CN105637960A

CN105637960A - Allocation method and apparatus for device-to-device transmission resource

Info

Publication number: CN105637960A
Application number: CN201480009873.7A
Authority: CN
Inventors: 孙卫军; 赵振山; 伍勇
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2014-09-22
Filing date: 2014-09-22
Publication date: 2016-06-01
Anticipated expiration: 2034-09-22
Also published as: WO2016044978A1; CN105637960B

Abstract

An allocation method for a device-to-device (D2D) communication transmission resource, a control device and a user equipment. The method comprises: a control device receives state information sent by at least two user equipments, the state information including at least one of user equipment identification and location information; the control device allocates a D2D communication transmission resource to the at least two user equipments according to the state information sent by the at least two user equipments; and the control device sends a notification message respectively to the at least two user equipments, the notification message being used for notifying the corresponding D2D communication transmission resource. The present invention can decrease the probability of transmission collision when a plurality of user equipments in a D2D system send data.

Description

The distribution method and device of a kind of device-to-device transfer resource

Technical field

Embodiments of the invention are related to communication system, more particularly, to the distribution method and device of a kind of device-to-device transfer resource.

Background technology

Device-to-device (Device to Device, D2D) communication is the direct technology communicated between user equipment (User Equipment, user equipment).Based on time division multiple acess (Time Division Multiple Access, TDMA in D2D systems), multiple user equipmenies carry out data within the different time and sent and received, and each user equipment therein needs to carry out data receiver and transmission within the different time, use time division duplex (Time Division Duplex, TDD) pattern.

In D2D communications, generally using Carrier Sense Multiple Access (Carrier Sense Multiple Access, CSMA)/collision avoidance techniques (Collision Avoidance, CA), be at war with user equipment communication.In CSMA/CA technologies, whether each user equipment can compete detection present channel in time window at one idle, if channel all keeps idle within the time observed by the user equipment, the user equipment is considered as oneself obtaining data transmitter meeting and can send data within the subsequent time.And other either with or without the user equipment for successfully obtaining launching opportunity, it is necessary to wait next competition time window, and compete launching opportunity again.

By taking two user equipmenies as an example, when the D2D systems based on TDMA are at war with communication using CSMA/CA, two user equipmenies detect present channel simultaneously when being the free time, and described two user equipmenies will send respective data simultaneously on this channel.That is, D2D, which communicates, has the transmitting collision problem of user equipment.Described two user equipmenies are tdd modes, and described two user equipmenies are all in the state for sending data, and they can not just receive the data from other side or other user equipmenies.In addition, because the transmission signal of described two user equipmenies is interfered, except other user equipmenies of above-mentioned two user equipment also can not effectively receive the data from described two user equipmenies.

Therefore, in the D2D systems based on TDMA, there are multiple user equipmenies while sending the transmitting collision problem of data.

The content of the invention

Embodiments of the invention provide the distribution method and device of a kind of device-to-device transfer resource, can Reduce when multiple user equipmenies in D2D systems send data and occur the probability of transmitting collision.

First aspect there is provided a kind of distribution method of device-to-device D2D communications resources, including：Control device receives the status information that at least two user equipmenies are sent, and the status information includes at least one in customer equipment identification and positional information；The status information that the control device is sent according at least two user equipment distributes D2D communications resources at least two user equipment；The control device sends a notification message at least two user equipment respectively, and the notification message is used to notify the corresponding D2D communications resource.

In the first possible implementation, the status information includes customer equipment identification；The status information that the control device is sent according at least two user equipment distributes D2D communications resources at least two user equipment, including：When the customer equipment identification of at least two user equipment is different, the control device is that at least two user equipment distributes different D2D communications resources.

In second of possible implementation, the status information includes positional information；The status information that the control device is sent according at least two user equipment distributes D2D communications resources at least two user equipment, including：The spacing of the control device at least two user equipmenies according to the state information acquisition that at least two user equipment is sent；When the spacing of at least two user equipment is more than predetermined value, the control device is that at least two user equipment distributes identical D2D communications resources, and/or when at least two user equipment is when being smaller than predetermined value, the control device is that at least two user equipment distributes different D2D communications resources.

In the third possible implementation, the status information includes positional information；The status information that the control device is sent according at least two user equipment distributes D2D communications resources at least two user equipment, including：The spacing of the control device at least two user equipmenies according to the state information acquisition that at least two user equipment is sent；According to the spacing of at least two user equipment, at least one at least two user equipment is assigned at least one group of user equipments；Different D2D communications resources are distributed for the different group of user equipments with the control device；Wherein, at least two user equipment, two user equipment quilts of predetermined value are smaller than It is assigned to different group of user equipments.

With reference to the third possible implementation, in the 4th kind of possible implementation, wherein, at least two user equipment, two user equipmenies that spacing is more than predetermined value are assigned to group of user equipments described in identical.

With reference to the third or the 4th kind of possible implementation, in the 5th kind of possible implementation, group information is included in the notification message, the group information is used for the user equipment group # for indicating to receive the user equipment of the notification message, and the available D2D communications resource of group of user equipments is corresponding with the user equipment group #.

Second aspect there is provided a kind of control device for device-to-device D2D communications resource allocations, including：Receiving unit, for receiving the status information that at least two user equipmenies are sent, the status information includes at least one in customer equipment identification and positional information；Processing unit, the status information for being sent according at least two user equipment is at least two user equipment distribution D2D communications resources；Transmitting element, for being sent a notification message respectively at least two user equipment, the notification message is used to notify the corresponding D2D communications resource.

In the first possible implementation, the status information includes customer equipment identification；The status information that the processing unit is used to be sent according at least two user equipment includes at least two user equipment distribution D2D communications resources：The processing unit is used for when the customer equipment identification of at least two user equipment is different, is that at least two user equipment distributes different D2D communications resources.

In second of possible implementation, the status information includes positional information；The status information that the processing unit is used to be sent according at least two user equipment includes at least two user equipment distribution D2D communications resources：The processing unit is used for the spacing of at least two user equipmenies according to the state information acquisition of at least two user equipment transmission；When the spacing of at least two user equipment is more than predetermined value, identical D2D communications resources are distributed at least two user equipment, and/or when at least two user equipment is when being smaller than predetermined value, the processing unit is that at least two user equipment distributes different D2D communications resources.

In the third possible implementation, the status information includes positional information；The status information that the processing unit is used to be sent according at least two user equipment includes at least two user equipment distribution D2D communications resources：The processing unit is used for the spacing of at least two user equipmenies according to the state information acquisition of at least two user equipment transmission；According to the spacing of at least two user equipment, at least one at least two user equipment is assigned at least one group of user equipments；With different D2D communications resources are distributed for the different group of user equipments；Wherein, at least two user equipment, two user equipmenies for being smaller than predetermined value are assigned to different group of user equipments.

The third aspect there is provided a kind of distribution method of device-to-device D2D communications resources, including：User equipment sends status information, and the status information includes at least one in customer equipment identification and positional information；The notification message that the user equipment receiving control apparatus is sent, the notification message is used to notify control device described in the user equipment to be the D2D communications resources that the user equipment is distributed；Wherein, the D2D communications resource is that the control device is that the user equipment is distributed according to the status information of the user equipment.

In the first possible implementation, the user equipment is the first user equipment；The D2D communications resource for distributing to first user equipment is different from the D2D communications resources for distributing to second user equipment, wherein, the customer equipment identification of first user equipment is different from user's mark of the second user equipment, either the positional information of first user equipment is different from the positional information of the second user equipment or first user equipment where group of user equipments and the second user Group of user equipments where equipment is different；Wherein, the user equipment for being smaller than predetermined value is assigned to different group of user equipments, and/or, the user equipment that spacing is more than predetermined value is assigned to group of user equipments described in identical.

With reference to the first possible implementation of the third aspect or the third aspect, in second of possible implementation, group information is included in the notification message, the group information is used for the user equipment group # for indicating to receive the user equipment of the notification message, and the available D2D communications resource of group of user equipments is corresponding with the user equipment group #.

With reference to second of possible implementation of the first possible implementation or the third aspect of the third aspect, the third aspect, in the third possible implementation, the status information is D2D information or control information, the D2D information is the information that the user equipment is sent to other user equipmenies, and the control information is the information that the user equipment is sent to the control device.

Fourth aspect there is provided a kind of user equipment, including：Transmitting element, for sending status information, the status information includes at least one in customer equipment identification and positional information；Receiving unit, the notification message sent for receiving control apparatus, the notification message is used to notify control device described in the user equipment to be the D2D communications resources that the user equipment is distributed；Wherein, the D2D communications resource is that the control device is that the user equipment is distributed according to the status information of the user equipment.

In the first possible implementation, the user equipment is the first user equipment；The D2D communications resource for distributing to first user equipment is different from the D2D communications resources for distributing to second user equipment, wherein, the customer equipment identification of first user equipment is different from user's mark of the second user equipment, either the positional information of first user equipment is different from the positional information of the second user equipment or first user equipment where group of user equipments it is different with group of user equipments where the second user equipment；

Wherein, the user equipment for being smaller than predetermined value is assigned to different group of user equipments, and/or, the user equipment that spacing is more than predetermined value is assigned to group of user equipments described in identical.

With reference to the first possible implementation of fourth aspect or fourth aspect, in second of possible implementation, group information is included in the notification message, the group information receives the notice for instruction The user equipment group # of the user equipment of message, the available D2D communications resource of group of user equipments is corresponding with the user equipment group #.

With reference to second of possible implementation of the first possible implementation or fourth aspect of fourth aspect, fourth aspect, in the third possible implementation, the status information is D2D information or control information, the D2D information is the information that the user equipment is sent to other user equipmenies, and the control information is the information that the user equipment is sent to the control device.

By such scheme, control device receives the status information that at least two user equipmenies are sent, and the status information that the control device is sent according at least two user equipment distributes D2D communications resources at least two user equipment.Relative to the competition communication based on CSMA/CA in the prior art, control device provided in an embodiment of the present invention is according to the scheduling that the status information of at least two user equipment is at least two user equipmenies user equipment progress D2D communications resources, therefore, the probability reduction that user equipment is interfered when sending signal, therefore, reduce when multiple user equipmenies in D2D systems send data and occur the probability of transmitting collision.

Brief description of the drawings

Technical scheme in order to illustrate the embodiments of the present invention more clearly, the required accompanying drawing used in embodiment or description of the prior art will be briefly described below, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is the schematic architectural diagram of the system of embodiments of the invention.

Fig. 2 is the distribution method flow chart of the device-to-device D2D communications resources of the embodiment of the present invention.

Fig. 3 is the control device for device-to-device D2D communications resource allocations of the embodiment of the present invention.

Fig. 4 is the distribution method flow chart of the device-to-device D2D communications resources of the embodiment of the present invention.

Fig. 5 is the user equipment of the embodiment of the present invention.

Fig. 6 is the distribution method of the device-to-device D2D communications resources of the embodiment of the present invention.

Fig. 7 is the distribution method of the device-to-device D2D communications resources of the embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.

Fig. 1 is system architecture provided in an embodiment of the present invention.The system of the embodiment of the present invention includes base station and user equipment.

Wherein, the base station includes evolution base station (edolved Node B, eNB), UMTS (Universal Mobile Telecommunications System, UMTS the roadside unit (Road Side Unit) of base station (Node B)), access point (Access Point, AP) or car networking system.The user equipment can be but not limited to vehicle-mounted mobile of mobile station (MS, Mobile Station), mobile terminal (Mobile Terminal), mobile phone (Mobile Telephone), mobile phone (handset), portable equipment (portable equipment) or car networking system etc..

The user equipment, which can be set up with base station between radio communication, such as radio communication between user equipment 1 and base station, user equipment, can also set up D2D communications, and such as user equipment 2 communicates with the D2D between user equipment 3.In embodiments of the present invention, the transfer resource shared by the D2D communications between user equipment is allocated by base station.

Fig. 2 is the distribution method of device-to-device D2D communications resources provided in an embodiment of the present invention.It is concretely comprised the following steps：

Step 11, control device receives the status information that at least two user equipmenies are sent.Wherein, the status information includes at least one in customer equipment identification and positional information.

Optionally, the customer equipment identification of at least two user equipment is different.The status information can also include the facility informations such as translational speed, the size of D2D message or the D2D message cycles of user equipment except customer equipment identification, positional information.

Step 12, the status information that the control device is sent according at least two user equipment distributes D2D communications resources at least two user equipment.By this step, the status information that control device is sent according at least two user equipment communicates at least two user equipment distribution D2D Transfer resource.I.e., the control device is according to the scheduling that the status information of at least two user equipment is at least two user equipmenies user equipment progress D2D communications resources, D2D communications resources are allocated by control device, therefore, the probability reduction that user equipment is interfered when D2D communicates and sends signal, therefore, reduce when multiple user equipmenies in D2D systems send data and occur the probability of transmitting collision.

Step 13, the control device sends a notification message at least two user equipment respectively.Wherein, the notification message is used to notify the corresponding D2D communications resource.

In an alternate embodiment of the invention, the status information includes customer equipment identification；The status information that the control device is sent according at least two user equipment distributes D2D communications resources at least two user equipment, including：When the customer equipment identification of at least two user equipment is different, the control device is that at least two user equipment distributes different D2D communications resources.Pass through this step, control device is that user equipment distributes different D2D communications resources according to the customer equipment identification of user equipment, the customer equipment identification of different user devices is different, thus, different user equipmenies carries out D2D communications in different D2D communications resources, reduces the probability for occurring transmitting collision.

In an alternate embodiment of the invention, the status information includes positional information；The status information that the control device is sent according at least two user equipment distributes D2D communications resources at least two user equipment, including：The spacing of the control device at least two user equipmenies according to the state information acquisition that at least two user equipment is sent；When the spacing of at least two user equipment is more than predetermined value, the control device is that at least two user equipment distributes identical D2D communications resources, and/or when at least two user equipment is when being smaller than predetermined value, the control device is that at least two user equipment distributes different D2D communications resources.Pass through this step, at a distance of closer, the user equipment for being such as smaller than a predetermined value is possible to transmitting collision problem occur, at least two user equipment for being smaller than a predetermined value is assigned to different D2D communications resources by control device, therefore, the probability that transmitting collision occurs at least two user equipment is reduced.At a distance of distant, even if transmitting collision occurs for the user equipment as spacing is more than a predetermined value, one is not interfered with yet Equipment receives the D2D information that its nearby device is sent, simultaneously, spacing is more than the user equipment of a predetermined value because controlled device has been assigned to identical D2D communications resources, therefore, the user equipment that spacing is more than a predetermined value will carry out D2D communications in identical D2D communications resource, and then improve the utilization ratio of D2D communications resources.

In an alternate embodiment of the invention, the status information includes positional information；The status information that the control device is sent according at least two user equipment distributes D2D communications resources at least two user equipment, including：The spacing of the control device at least two user equipmenies according to the state information acquisition that at least two user equipment is sent；According to the spacing of at least two user equipment, at least one at least two user equipment is assigned at least one group of user equipments；Different D2D communications resources are distributed for the different group of user equipments with the control device；Wherein, at least two user equipment, two user equipmenies for being smaller than predetermined value are assigned to different group of user equipments.Pass through this step, at a distance of closer, the user equipment for being such as smaller than a predetermined value is possible to transmitting collision problem occur, at least two user equipment for being smaller than a predetermined value is assigned to different group of user equipments by control device, all user equipmenies for being smaller than a predetermined value have all been assigned to different group of user equipments, control device distributes different D2D communications resources for the different group of user equipments, different groups have been assigned to due to being smaller than the user equipment of a predetermined value, therefore, the user equipment for being smaller than a predetermined value is also assigned different D2D communications resources, reduce the probability for occurring transmitting collision.

In an alternate embodiment of the invention, wherein, at least two user equipment, spacing be more than predetermined value two user equipmenies be assigned to group of user equipments described in identical.By this step, at a distance of distant, even if transmitting collision occurs for the user equipment as spacing is more than a predetermined value, do not interfere with an equipment yet and receive the D2D information that its nearby device is sent.Simultaneously, spacing is more than the user equipment of a predetermined value because controlled device has been assigned to identical group of user equipments, therefore, the user equipment for belonging to same group of user equipments is all assigned to identical D2D communications resources, and then improves the utilization ratio of D2D communications resources.

In an alternate embodiment of the invention, group information is included in the notification message, the group information is used to indicate The user equipment group # of the user equipment of the notification message is received, the available D2D communications resource of group of user equipments is corresponding with the user equipment group #.

Wherein, control device can be grouped by any mode come the positional information according to included by status information at least two user equipment, the following is an example of packet mode：

Vacation let N be ought interior all D2D communications that can be used for the previous period transfer resource number, all user equipmenies are divided into N number of set by controller according to following principle：

(1) number of devices each gathered is equal or roughly equal；

(2) user equipment for being smaller than predetermined value is in a set.

Controller is randomly assigned different D2D communications resources to different user equipment in a set, and same D2D communications resource can be used by belonging to the user equipment of different sets.For example, it is assumed that transfer resource number N=3 of all D2D communications that can be used, have 11 user equipmenies, 11 user equipmenies are divided into 3 set according to above-mentioned two principle, such as：User equipment 1,2,3 and 4 has been assigned to set 1, and user equipment 5,6,7 and 8 has been assigned to set 2, and user equipment 9,10 and 11 has been assigned to set 3.Control device distributes different D2D communications resources for the user equipment of identity set, it is such as the distribution D2D communications of user equipment 1 resource 1, for the distribution D2D communications of user equipment 2 resource 2, it is the distribution D2D communications of user equipment 4 resource 4 for the distribution D2D communications of user equipment 3 resource 3.And same D2D communications resource can be used by belonging to the user equipment equipment of different sets, the distribution D2D communications of user equipment 5 resource 1 such as set 2.It is specific as shown in table 1.

Table 1

	D2D transfer resources 1	D2D transfer resources 2	D2D transfer resources 3	D2D transfer resources 4
	D2D transfer resources 1	D2D transfer resources 2	D2D transfer resources 3	D2D transfer resources 4	Set 1	User equipment 1	User equipment 2	User equipment 3	User equipment 4
Set 2	User equipment 5	User equipment 6	User equipment 7	User equipment 8	Set 1	User equipment 1	User equipment 2	User equipment 3	User equipment 4
Set 2	User equipment 5	User equipment 6	User equipment 7	User equipment 8	Set 3	User equipment 9	User equipment 10	User equipment 11

In table 1, user equipment 1,2,3,4 is assigned to different group of user equipments and then different D2D communications resources is distributed for user equipment 1,2,3,4 by control device, user equipment 5,6,7,8 is assigned to different group of user equipments and then different D2D communications resources is distributed for user equipment 5,6,7,8 by control device, and user equipment 9,10,11 is assigned to different by control device Group of user equipments and then different D2D communications resources are distributed for user equipment 9,10,11, thus reduce the probability for occurring transmitting collision.Control device is by user equipment 1, 5, 9 are assigned to identical group of user equipments and then for user equipment 1, 5, 9 distribution identical D2D communications resources 1, control device is by user equipment 2, 6, 10 are assigned to identical group of user equipments and then for user equipment 2, 6, 10 distribution identical D2D communications resources 2, control device is by user equipment 3, 7, 11 are assigned to identical group of user equipments and then for user equipment 3, 7, 11 distribution identical D2D communications resources 3, control device is by user equipment 4, 8 are assigned to identical group of user equipments and then for user equipment 4, 8 distribution identical D2D communications resources 4, which thereby enhance the utilization ratio of D2D communications resources.

In an alternate embodiment of the invention, it is smaller than the predetermined value that at least two user equipment of a predetermined value is assigned to described in different group of user equipments and can be described as first predetermined value, the predetermined value that two user equipmenies that spacing is more than predetermined value are assigned to described in identical described in group of user equipments can be described as second predetermined value, and the first predetermined value can be the same or different with the second predetermined value.In an alternate embodiment of the invention, the first predetermined value is equal to the second predetermined value.The value of the predetermined value can communicate according to the quantity, density, D2D of user equipment occurs the probability flexible in size setting of transmitting collision.For example:The predetermined value can be one in one group of numerical value.For example, this group of numerical value can be { ..., 50,100,150,200 ... }, numerical value unit is rice.In the high urban area circumstance of user equipment density, the predetermined value can be set as less numerical value in this group of numerical value, such as 50 meters.It can so to be spaced the user equipment more than 50 meters and use same D2D transfer resources, so as to improve the utilization ratio of D2D transfer resources.In the low density suburban environment of user equipment, the predetermined value can be set as numerical value larger in this group of numerical value, such as 150 meters.The user equipment in the range of 150 meters can be so caused all to use different D2D transfer resources, so as to overcome D2D transfer resources to collide.

In an alternate embodiment of the invention, the status information is D2D information or control information, the D2D information is the information that a user equipment at least two user equipment is sent to other user equipmenies, and the control information is the information that a user equipment at least two user equipment is sent to the control device.In an alternate embodiment of the invention, the control information is sent to control device by least one descending sub frame and/or at least one sub-frame of uplink in LTE TDD radio frames.In optional embodiment In, the control information is D2D communications resource scheduling request message.

In an alternate embodiment of the invention, the control device distributes at least two D2D communications resources for an equipment of at least two user equipment.

In an alternate embodiment of the invention; the D2D communications resource includes at least one time slot; the time slot includes training sequence time portion, data transmission period part and protection interval time portion, and the length of the time slot is the function of the D2D communication bandwidths of a user equipment at least two user equipment.It is preferred that, at least one described time slot can be isometric.Certainly, at least one described time slot can also be Length discrepancy.Wherein, training sequence time portion is used for synchronous signal transmission and/or other signals, for helping D2D communications to synchronize and/or channel estimation.Data transmission period part is used for transmission equipment to the data message of equipment.Protection interval is used for providing user equipment and receives or receive the conversion time of transmitting from being transmitted into.If two adjacent time slots are assigned to same equipment, wherein the protection interval time portion of first time slot is also used as D2D data transfers, and/or some or all of training sequence time portion of second time slot are also used as D2D data transfers.If at least three adjacent time slots are assigned to same equipment; the protection interval of other all time slots in addition to wherein last time slot may be used as D2D data transfers, and/or some or all of training sequence time portion of other all time slots in addition to wherein first time slot can be used as D2D data transfers.

In an alternate embodiment of the invention, the length of a time slot can be relevant with D2D communication bandwidths.For example, being communicated for 10MHZ bandwidth D2D, slot length can be 500us.For 20MHZ bandwidth D2D communications, slot length can be 250us.

In an alternate embodiment of the invention, the D2D communications resource includes at least one subframe, and the subframe is the subframe of Long Term Evolution LTE system.

Fig. 3 is a kind of control device for device-to-device D2D communications resource allocations provided in an embodiment of the present invention.The control device is used to realize that each embodiment in preceding method, therefore preceding method is equally applicable to the control device, repeats no more here.The control device includes receiving unit 301, processing unit 302 and transmitting element 303.

Receiving unit 301, for receiving the status information that at least two user equipmenies are sent.Wherein, institute Stating status information includes at least one in customer equipment identification and positional information.

Processing unit 302, the status information for being sent according at least two user equipment is at least two user equipment distribution D2D communications resources.The status information that processing unit 302 is sent according at least two user equipment distributes D2D communications resources at least two user equipment.I.e., the processing unit 302 is according to the scheduling that the status information of at least two user equipment is at least two user equipmenies user equipment progress D2D communications resources, row D2D communications resources are allocated by control device, therefore, the probability reduction that user equipment is interfered when D2D communicates and sends signal, therefore, reduce when multiple user equipmenies in D2D systems send data and occur the probability of transmitting collision.

Transmitting element 303, for being sent a notification message respectively at least two user equipment, the notification message is used to notify the corresponding D2D communications resource.

In an alternate embodiment of the invention, the status information includes customer equipment identification；The status information that the processing unit 302 is used to be sent according at least two user equipment includes at least two user equipment distribution D2D communications resources：The processing unit 302 is used for when the customer equipment identification of at least two user equipment is different, is that at least two user equipment distributes different D2D communications resources.Processing unit 302 is that user equipment distributes different D2D communications resources according to the customer equipment identification of user equipment, the customer equipment identification of different user devices is different, thus, different user equipmenies carries out D2D communications in different D2D communications resources, reduces the probability for occurring transmitting collision.

In an alternate embodiment of the invention, the status information includes positional information；The status information that the processing unit 302 is used to be sent according at least two user equipment includes at least two user equipment distribution D2D communications resources：The processing unit 302 is used for the spacing of at least two user equipmenies according to the state information acquisition of at least two user equipment transmission；As at least two user When the spacing of equipment is more than predetermined value, identical D2D communications resources are distributed at least two user equipment, and/or when at least two user equipment is when being smaller than predetermined value, the processing unit 302 is that at least two user equipment distributes different D2D communications resources.At a distance of closer, the user equipment for being such as smaller than a predetermined value is possible to transmitting collision problem occur, at least two user equipment for being smaller than a predetermined value is assigned to different D2D communications resources by processing unit 302, therefore, the probability that transmitting collision occurs at least two user equipment is reduced.At a distance of distant, even if transmitting collision occurs for the user equipment as spacing is more than a predetermined value, do not interfere with an equipment yet and receive the D2D information that its nearby device is sent.Simultaneously, spacing is more than the user equipment of a predetermined value because processed unit 302 has been assigned to identical D2D communications resources, therefore, the user equipment that spacing is more than a predetermined value will carry out D2D communications in identical D2D communications resource, and then improve the utilization ratio of D2D communications resources.

In an alternate embodiment of the invention, the status information includes positional information；The status information that the processing unit 302 is used to be sent according at least two user equipment includes at least two user equipment distribution D2D communications resources：The processing unit 302 is used for the spacing of at least two user equipmenies according to the state information acquisition of at least two user equipment transmission；According to the spacing of at least two user equipment, at least one at least two user equipment is assigned at least one group of user equipments；With different D2D communications resources are distributed for the different group of user equipments；Wherein, at least two user equipment, two user equipmenies for being smaller than predetermined value are assigned to different group of user equipments.At a distance of closer, the user equipment for being such as smaller than a predetermined value is possible to transmitting collision problem occur, at least two user equipment for being smaller than a predetermined value is assigned to different group of user equipments by processing unit 302, all user equipmenies for being smaller than a predetermined value have all been assigned to different group of user equipments, processing unit 302 distributes different D2D communications resources for the different group of user equipments, different groups have been assigned to due to being smaller than the user equipment of a predetermined value, therefore, the user equipment for being smaller than a predetermined value is also assigned different D2D communications resources, reduce the probability for occurring transmitting collision.

In an alternate embodiment of the invention, wherein, at least two user equipment, spacing is more than predetermined Two user equipmenies of value are assigned to group of user equipments described in identical.At a distance of distant, even if transmitting collision occurs for the user equipment as spacing is more than a predetermined value, do not interfere with an equipment yet and receive the D2D information that its nearby device is sent.Simultaneously, spacing is more than the user equipment of a predetermined value because controlled device has been assigned to identical group of user equipments, therefore, the user equipment for belonging to same group of user equipments is all assigned to identical D2D communications resources, and then improves the utilization ratio of D2D communications resources.

In an alternate embodiment of the invention, group information is included in the notification message, the group information is used for the user equipment group # for indicating to receive the user equipment of the notification message, and the available D2D communications resource of group of user equipments is corresponding with the user equipment group #.

In an alternate embodiment of the invention, it is smaller than the predetermined value that at least two user equipment of a predetermined value is assigned to described in different group of user equipments and can be described as first predetermined value, the predetermined value that two user equipmenies that spacing is more than predetermined value are assigned to described in identical described in group of user equipments can be described as second predetermined value, and the first predetermined value can be the same or different with the second predetermined value.In an alternate embodiment of the invention, the first predetermined value is equal to the second predetermined value.The value of the predetermined value can communicate according to the quantity, density, D2D of user equipment occurs the probability flexible in size setting of transmitting collision.For example:The predetermined value can be an in one group of numerical value for example, this group of numerical value can be { 50,100,150,200 }, and numerical value unit is rice.In the high urban area circumstance of user equipment density, the predetermined value can be set as less numerical value in this group of numerical value, such as 50 meters.It can so to be spaced the user equipment more than 50 meters and use same D2D transfer resources, so as to improve the utilization ratio of D2D transfer resources.In the low density suburban environment of user equipment, the predetermined value can be set as numerical value larger in this group of numerical value, such as 150 meters.The user equipment in the range of 150 meters can be so caused all to use different D2D transfer resources, so as to overcome D2D transfer resources to collide.

In an alternate embodiment of the invention, the status information is D2D information or control information, the D2D information is the information that a user equipment at least two user equipment is sent to other user equipmenies, and the control information is the information that a user equipment at least two user equipment is sent to the control device.In an alternate embodiment of the invention, the control information by LTE TDD radio frames extremely A few descending sub frame and/or at least one sub-frame of uplink are sent to control device.In an alternate embodiment of the invention, the control information is D2D communications resource scheduling request message.

In optional implementation, the processing unit 302 can be processor.It is described processing implement body can be：BBP, digital signal processor (Digital Signal Processor, DSP), field programmable gate array (Field Programmable Gata Array,) or CPU (Central Processing Unit, CPU) FPGA.The receiving unit 301 can be receiver (receiver), the transmitting element 303 can be transmitter (transmitter).The receiving unit 301 and the transmitting element 303 can also be realized by transceiver (transceiver).The receiver, transmitter and transceiver can be radio circuit or the combination comprising the processor and radio circuit.

Fig. 4 is a kind of distribution method flow chart of device-to-device D2D communications resources provided in an embodiment of the present invention, and it is concretely comprised the following steps：

Step 41, user equipment sends status information.Wherein, the status information includes at least one in customer equipment identification and positional information.

Optionally, the status information can also include the facility informations such as translational speed, the size of D2D message or the D2D message cycles of user equipment except customer equipment identification, positional information.

Step 42, the notification message that the user equipment receiving control apparatus is sent.

The notification message is used to notify control device described in the user equipment to be the D2D communications resources that the user equipment is distributed；Wherein, the D2D communications resource is that the control device is that the user equipment is distributed according to the status information of the user equipment.

In an alternate embodiment of the invention, the user equipment is the first user equipment；The D2D communications resource for distributing to first user equipment is different from the D2D communications resources for distributing to second user equipment, wherein, the customer equipment identification of first user equipment is different from user's mark of the second user equipment, either the positional information of first user equipment is different from the positional information of the second user equipment or first user equipment where group of user equipments it is different with group of user equipments where the second user equipment；Wherein, the user equipment for being smaller than predetermined value is assigned to different group of user equipments, and/or, the user equipment that spacing is more than predetermined value is assigned to group of user equipments described in identical.

In an alternate embodiment of the invention, the status information is D2D information or control information, the D2D letters Breath is the information that the user equipment is sent to other user equipmenies, and the control information is the information that the user equipment is sent to the control device.In an alternate embodiment of the invention, the control information is sent to control device by least one descending sub frame and/or at least one sub-frame of uplink in LTETDD radio frames.In an alternate embodiment of the invention, the control information is D2D communications resource scheduling request message.

In an alternate embodiment of the invention; the D2D communications resource includes at least one time slot; the time slot includes training sequence time portion, data transmission period part and protection interval time portion, and the length of the time slot is the function of the D2D communication bandwidths of a user equipment at least two user equipment.

Fig. 5 is a kind of user equipment provided in an embodiment of the present invention, and the user equipment includes transmitting element 501 and receiving unit 502.

Transmitting element 501, for sending status information, the status information includes at least one in customer equipment identification and positional information.

Receiving unit 502, the notification message sent for receiving control apparatus, the notification message is used to notify control device described in the user equipment to be the D2D communications resources that the user equipment is distributed.Wherein, the D2D communications resource is that the control device is that the user equipment is distributed according to the status information of the user equipment.

In an alternate embodiment of the invention, the status information is D2D information or control information, and the D2D information is the information that the user equipment is sent to other user equipmenies, and the control information is the information that the user equipment is sent to the control device.In an alternate embodiment of the invention, the control information is sent to control device by least one descending sub frame and/or at least one sub-frame of uplink in LTETDD radio frames.In an alternate embodiment of the invention, the control information is D2D communications resource scheduling request message.

Time slot described in embodiment and subframe corresponding to Fig. 4 and Fig. 5 is consistent with the time slot and subframe described in the embodiment corresponding to Fig. 2 and Fig. 3, will not be repeated here.

In optional implementation, the receiving unit 502 can be receiver (receiver), and the transmitting element 501 can be transmitter (transmitter).The receiving unit and the transmitting element can also be realized by transceiver (transceiver).The receiver, transmitter and transceiver can be radio circuit or the combination comprising the processor and radio circuit.

With reference to specific example, embodiments of the invention are described more fully.

Fig. 6 implements the distribution method for the device-to-device D2D communications resources that body is provided for the present invention.

User equipment 1,2,3 is merely exemplary and the not limitation to number of user equipment.User equipment 1,2,3 sends status information respectively.The status information that user equipment 1,2,3 is sent respectively is D2D information or control information.The D2D information is a user equipment in the user equipment 1,2,3 It is sent to the information of other user equipmenies, the control information is the information that a user equipment in the user equipment 1,2,3 is sent to the control device.The status information includes at least one in customer equipment identification and positional information.

Control device receives the status information that user equipment 1,2,3 is each sent, and is that the user equipment 1,2,3 distributes D2D communications resources according to the status information.

Control device is according to user equipment 1, 2, 3 customer equipment identification is user equipment 1, 2, 3 distribution D2D communications resources, due to user equipment 1, 2, 3 customer equipment identification is different, therefore, control device is according to user equipment 1, 2, 3 customer equipment identification is user equipment 1, 2, 3 distribution D2D communications resources are different, i.e. control device is according to user equipment 1, 2, 3 customer equipment identification is user equipment 1, 2, the different D2D communications resources of 3 distribution, if control device is the distribution D2D communications of user equipment 1 resource 1, control device is the distribution D2D communications of user equipment 2 resource 2, control device is the distribution D2D communications of user equipment 3 resource 3.User equipment 1,2,3 sends signal in different D2D communications resources 1,2,3, therefore reduces the probability for occurring transmitting collision.

Control device sends a notification message to user equipment 1,2,3, this notification message is used for control device described in control device notifying user equipment 1,2,3 according to the different D2D communications resources 1,2,3 that the customer equipment identification of user equipment 1,2,3 is the distribution of user equipment 1,2,3, specifically, control device is the distribution D2D communications of user equipment 1 resource 1, control device is the distribution D2D communications of user equipment 2 resource 2, and control device is the distribution D2D communications of user equipment 3 resource 3.

Fig. 7 implements the distribution method for the device-to-device D2D communications resources that body is provided for the present invention.

User equipment 1,2,3 is merely exemplary and the not limitation to number of user equipment.User equipment 1,2,3 sends status information respectively.The status information that user equipment 1,2,3 is sent respectively is D2D information or control information.The D2D information is the information that a user equipment in the user equipment 1,2,3 is sent to other user equipmenies, and the control information is the information that a user equipment in the user equipment 1,2,3 is sent to the control device.The status information includes at least one in customer equipment identification and positional information.

Control device is got after user equipment 1,2,3 respective positional informations, the spacing of any two user equipment in user equipment 1,2,3 is obtained according to user equipment 1,2,3 respective positional informations, such as, the spacing of user equipment 1 and user equipment 2, the spacing of user equipment 1 and user equipment 3, the spacing of user equipment 2 and user equipment 3.Two user equipmenies for being smaller than a predetermined value are assigned to different group of user equipments by control device.The predetermined value can be one in one group of numerical value.For example, this group of numerical value can be { ..., 50,100,150,200 ... }, numerical value unit is rice.As shown in fig. 7, user equipment 1 and user equipment 2 are smaller than predetermined value, then user equipment 1 and user equipment 2 are assigned to different group of user equipments 1,2 by control device.Control device distributes different D2D communications resources for the different group of user equipments, the distribution D2D communications of group of user equipments 1 resource 1 as belonging to control device is user equipment 1, control device is the distribution D2D communications of group of user equipments 2 resource 2 belonging to user equipment 2, user equipment 1,2 sends signal in different D2D communications resources 1,2, therefore reduces the probability for occurring transmitting collision.

On the premise of two user equipmenies for being smaller than a predetermined value are assigned to different group of user equipments by control device, two user equipmenies that spacing is more than the predetermined value are assigned to one group of user equipments of identical by control device.As shown in Figure 7, the spacing of user equipment 3 and user equipment 1 is more than the predetermined value, then user equipment 3 and user equipment 1 can be assigned to same group of user equipments 1 by control device, control device is that the group of user equipments 1 distributes a D2D communications resource, that is D2D communications resource, so, control device is the D2D communications resource 1 of the distribution of user equipment 1 and 3 equally in group of user equipments 1.Because the spacing of user equipment 1 and user equipment 3 is more than the predetermined value, even if transmission collision occurs between them, does not interfere with one of equipment yet and receive the D2D information that its nearby device is sent.In the case, control device is the D2D communications resource 1 of the distribution of user equipment 1 and 3 equally in group of user equipments 1, and user equipment 1 and 3 all carries out D2D communications in D2D communications resource 1, so as to improve the utilization ratio of D2D transfer resources.If user equipment 1 is smaller than a predetermined value with user equipment 2, then user equipment 1 and user equipment 2 It is assigned to different group of user equipments, the spacing of user equipment 3 and user equipment 1 is more than the predetermined value, the spacing of user equipment 3 and user equipment 2 is also greater than the predetermined value, so user equipment 3 can be assigned to same group of user equipments with user equipment 1, user equipment 3 can be assigned to same group of user equipments with user equipment 2, but user equipment 3 can not be assigned to same group of user equipments with user equipment 1 and user equipment 2 simultaneously.In Fig. 7 embodiments, user equipment can be grouped by control device according to the spacing of different user devices, user equipment can not also be grouped, and be only when the spacing of the user equipment 1,2,3 is more than predetermined value, the control device is that the user equipment 1,2,3 distributes identical D2D communications resources, and/or when the user equipment 1,2,3 is when being smaller than predetermined value, the control device is that the user equipment 1,2,3 distributes different D2D communications resources.

The value of the predetermined value can communicate according to the quantity, density, D2D of user equipment occurs the probability flexible in size setting of transmitting collision.In the high urban area circumstance of user equipment density, the predetermined value can be set as less numerical value in this group of numerical value, such as 50 meters.It can so to be spaced the user equipment more than 50 meters and use same D2D transfer resources, so as to improve the utilization ratio of D2D transfer resources.In the low density suburban environment of user equipment, the predetermined value can be set as numerical value larger in this group of numerical value, such as 150 meters.The user equipment in the range of 150 meters can be so caused all to use different D2D transfer resources, so as to overcome D2D transfer resources to collide.

The terms "and/or", only a kind of incidence relation for describing affiliated partner, represents there may be three kinds of relations, for example, A and/or B, can be represented：Individualism A, while there is A and B, these three situations of individualism B.In addition, character "/" herein, it is a kind of relation of "or" to typically represent forward-backward correlation object.

It is described above; only embodiment of the invention, but protection scope of the present invention is not limited thereto, any one skilled in the art the invention discloses technical scope in; change or replacement can be readily occurred in, should be all included within the scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.

Claims

A kind of distribution method of device-to-device D2D communications resources, it is characterised in that including：

Control device receives the status information that at least two user equipmenies are sent, and the status information includes at least one in customer equipment identification and positional information；

The status information that the control device is sent according at least two user equipment distributes D2D communications resources at least two user equipment；

The control device sends a notification message at least two user equipment respectively, and the notification message is used to notify the corresponding D2D communications resource.
According to the method described in claim 1, it is characterised in that the status information includes customer equipment identification；

The status information that the control device is sent according at least two user equipment distributes D2D communications resources at least two user equipment, including：

When the customer equipment identification of at least two user equipment is different, the control device is that at least two user equipment distributes different D2D communications resources.
According to the method described in claim 1, it is characterised in that the status information includes positional information；

The status information that the control device is sent according at least two user equipment distributes D2D communications resources at least two user equipment, including：

The spacing of the control device at least two user equipmenies according to the state information acquisition that at least two user equipment is sent；

When the spacing of at least two user equipment is more than predetermined value, the control device is that at least two user equipment distributes identical D2D communications resources, and/or when at least two user equipment is when being smaller than predetermined value, the control device is that at least two user equipment distributes different D2D communications resources.
According to the method described in claim 1, it is characterised in that the status information includes positional information；

The status information that the control device is sent according at least two user equipment distributes D2D communications resources at least two user equipment, including：

The spacing of the control device at least two user equipmenies according to the state information acquisition that at least two user equipment is sent；

According to the spacing of at least two user equipment, at least one at least two user equipment is assigned at least one group of user equipments；With

The control device distributes different D2D communications resources for the different group of user equipments；

Wherein, at least two user equipment, two user equipmenies for being smaller than predetermined value are assigned to different group of user equipments.
Method according to claim 4, it is characterised in that wherein, at least two user equipment, two user equipmenies that spacing is more than predetermined value are assigned to group of user equipments described in identical.
Method according to claim 4 or 5, it is characterized in that, group information is included in the notification message, the group information is used for the user equipment group # for indicating to receive the user equipment of the notification message, and the available D2D communications resource of group of user equipments is corresponding with the user equipment group #.
Method according to any one in claim 1-6, it is characterised in that

The status information is D2D information or control information, the D2D information is the information that a user equipment at least two user equipment is sent to other user equipmenies, and the control information is the information that a user equipment at least two user equipment is sent to the control device.
Method according to claim 7, it is characterised in that the control information is D2D communications resource scheduling request message.
Method according to any one in claim 1-8, it is characterised in that：The D2D communications resource includes at least one time slot; the time slot includes training sequence time portion, data transmission period part and protection interval time portion, and the length of the time slot is the function of the D2D communication bandwidths of a user equipment at least two user equipment；

Or, the D2D communications resource includes at least one subframe, and the subframe is the subframe of Long Term Evolution LTE system.
A kind of control device for device-to-device D2D communications resource allocations, it is characterised in that including：

Receiving unit, for receiving the status information that at least two user equipmenies are sent, the status information includes at least one in customer equipment identification and positional information；

Processing unit, the status information for being sent according at least two user equipment is at least two user equipment distribution D2D communications resources；

Transmitting element, for being sent a notification message respectively at least two user equipment, the notification message is used to notify the corresponding D2D communications resource.
Device according to claim 10, it is characterised in that the status information includes customer equipment identification；

The status information that the processing unit is used to be sent according at least two user equipment includes at least two user equipment distribution D2D communications resources：

The processing unit is used for when the customer equipment identification of at least two user equipment is different, is that at least two user equipment distributes different D2D communications resources.
Device according to claim 10, it is characterised in that the status information includes positional information；

The status information that the processing unit is used to be sent according at least two user equipment includes at least two user equipment distribution D2D communications resources：

The processing unit is used for the spacing of at least two user equipmenies according to the state information acquisition of at least two user equipment transmission；

When the spacing of at least two user equipment is more than predetermined value, identical D2D communications resources are distributed at least two user equipment, and/or when at least two user equipment is when being smaller than predetermined value, the processing unit is that at least two user equipment distributes different D2D communications resources.
Device according to claim 10, it is characterised in that the status information includes positional information；

The status information that the processing unit is used to be sent according at least two user equipment includes at least two user equipment distribution D2D communications resources：

The processing unit is used for the spacing of at least two user equipmenies according to the state information acquisition of at least two user equipment transmission；

According to the spacing of at least two user equipment, at least one at least two user equipment is assigned at least one group of user equipments；With

The different group of user equipments distributes different D2D communications resources；

Wherein, at least two user equipment, two user equipmenies for being smaller than predetermined value are assigned to different group of user equipments.
Device according to claim 13, it is characterised in that wherein, at least two user equipment, two user equipmenies that spacing is more than predetermined value are assigned to group of user equipments described in identical.
Device according to claim 13 or 14, it is characterized in that, group information is included in the notification message, the group information is used for the user equipment group # for indicating to receive the user equipment of the notification message, and the available D2D communications resource of group of user equipments is corresponding with the user equipment group #.
Device according to any one in claim 10-15, it is characterised in that

The status information is D2D information or control information, the D2D information is the information that a user equipment at least two user equipment is sent to other user equipmenies, and the control information is the information that a user equipment at least two user equipment is sent to the control device.
Device according to claim 16, it is characterised in that the control information is D2D communications resource scheduling request message.
Device according to any one in claim 10-17, it is characterised in that：The D2D communications resource includes at least one time slot, and the time slot includes training sequence time portion, data and passed Defeated time portion and protection interval time portion, the length of the time slot is the function of the D2D communication bandwidths of a user equipment at least two user equipment；

Or, the D2D communications resource includes at least one subframe, and the subframe is the subframe of Long Term Evolution LTE system.
A kind of distribution method of device-to-device D2D communications resources, it is characterised in that including：

User equipment sends status information, and the status information includes at least one in customer equipment identification and positional information；

The notification message that the user equipment receiving control apparatus is sent, the notification message is used to notify control device described in the user equipment to be the D2D communications resources that the user equipment is distributed；

Wherein, the D2D communications resource is that the control device is that the user equipment is distributed according to the status information of the user equipment.
Method according to claim 19, it is characterised in that：The user equipment is the first user equipment；The D2D communications resource for distributing to first user equipment is different from the D2D communications resources for distributing to second user equipment, wherein, the customer equipment identification of first user equipment is different from user's mark of the second user equipment, either the positional information of first user equipment is different from the positional information of the second user equipment or first user equipment where group of user equipments it is different with group of user equipments where the second user equipment；

Wherein, the user equipment for being smaller than predetermined value is assigned to different group of user equipments, and/or, the user equipment that spacing is more than predetermined value is assigned to group of user equipments described in identical.
Method according to claim 19 or 20, it is characterized in that, group information is included in the notification message, the group information is used for the user equipment group # for indicating to receive the user equipment of the notification message, and the available D2D communications resource of group of user equipments is corresponding with the user equipment group #.
Method according to any one in claim 19-21, it is characterised in that：

The status information is D2D information or control information, and the D2D information is the information that the user equipment is sent to other user equipmenies, and the control information is that the user equipment is sent to the control and set Standby information.
Method according to claim 22, it is characterised in that the control information is D2D communications resource scheduling request message.
Method according to any one in claim 19-23, it is characterised in that：The D2D communications resource includes at least one time slot; the time slot includes training sequence time portion, data transmission period part and protection interval time portion, and the length of the time slot is the function of the D2D communication bandwidths of a user equipment at least two user equipment；

Or, the D2D communications resource includes at least one subframe, and the subframe is the subframe of Long Term Evolution LTE system.
A kind of user equipment, it is characterised in that including：

Transmitting element, for sending status information, the status information includes at least one in customer equipment identification and positional information；

Receiving unit, the notification message sent for receiving control apparatus, the notification message is used to notify control device described in the user equipment to be the D2D communications resources that the user equipment is distributed；

Wherein, the D2D communications resource is that the control device is that the user equipment is distributed according to the status information of the user equipment.
User equipment according to claim 25, it is characterised in that：The user equipment is the first user equipment；The D2D communications resource for distributing to first user equipment is different from the D2D communications resources for distributing to second user equipment, wherein, the customer equipment identification of first user equipment is different from user's mark of the second user equipment, either the positional information of first user equipment is different from the positional information of the second user equipment or first user equipment where group of user equipments it is different with group of user equipments where the second user equipment；

Wherein, the user equipment for being smaller than predetermined value is assigned to different group of user equipments, and/or, the user equipment that spacing is more than predetermined value is assigned to group of user equipments described in identical.
User equipment according to claim 25 or 26, it is characterised in that group information is included in the notification message, the group information receives the user equipment of the notification message for instruction User equipment group #, the available D2D communications resource of group of user equipments is corresponding with the user equipment group #.
User equipment according to any one in claim 25-27, it is characterised in that：

The status information is D2D information or control information, and the D2D information is the information that the user equipment is sent to other user equipmenies, and the control information is the information that the user equipment is sent to the control device.
User equipment according to claim 28, it is characterised in that the control information is D2D communications resource scheduling request message.
User equipment according to any one in claim 25-29, it is characterised in that：The D2D communications resource includes at least one time slot; the time slot includes training sequence time portion, data transmission period part and protection interval time portion, and the length of the time slot is the function of the D2D communication bandwidths of a user equipment at least two user equipment；

Or, the D2D communications resource includes at least one subframe, and the subframe is the subframe of Long Term Evolution LTE system.