CN102420682B - Downlink feedback information for trunk link transmission time sequence defining method and device - Google Patents
Downlink feedback information for trunk link transmission time sequence defining method and device Download PDFInfo
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- CN102420682B CN102420682B CN201010503357.3A CN201010503357A CN102420682B CN 102420682 B CN102420682 B CN 102420682B CN 201010503357 A CN201010503357 A CN 201010503357A CN 102420682 B CN102420682 B CN 102420682B
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Abstract
Do you the invention discloses a kind of TDD? downlink feedback information for trunk link transmission time sequence defining method and device in LTE-A, does the method comprise: according to TDD? relay sub-frame configuration set in lte-a system under subframe uplink-downlink configuration, determines downlink feedback information for trunk link transmission time sequence; Wherein, described sequential refers to the sequential relationship of the transmission of repeated link uplink business data and the transmission of corresponding downlink feedback information.Relay link downlink ACK/NACK feedback information correctly transmits to adopt method provided by the invention to ensure, and then ensures the reliability of business data transmission between base station and relay station.
Description
Technical field
The present invention relates to the communications field, downlink feedback information for trunk link transmission time sequence defining method and device in a kind of time division duplex advanced long-term evolution system TDDLTE-A.
Background technology
The demand for development of mobile communication to support higher transmission rate, more perfect quorum sensing inhibitor and higher resource utilization.Relaying (Relay) technology can increase covering and balance, increase cell throughout, and relay station is compared to base station, there is relatively little deployment cost, therefore relaying is regarded as Long Term Evolution (LTE, LongTermEvolution) evolution system a---key technology in senior Long Term Evolution (LTE-A, LTE-Advanced) system.
At time division duplex (TDD, TimeDivisionDual) in LTE system, frequency resource divides in time respectively in units of frame, and LTE herein refers in particular to two protocol version Release-8 or Release-9 of LTE usually, is called for short Rel-8 or Rel-9.As shown in Figure 1, the length of each radio frames is 10 milliseconds, and each radio frames comprises the subframe that 10 length are 1 millisecond, wherein comprises sub-frame of uplink, descending sub frame and special subframe respectively.Ratio for ascending-descending subframes is different, 7 kinds of subframe configuration structure (subframe uplink-downlink configuration are had in TDDLTE system, Uplink-downlinkconfiguration, be called for short UL-DLconfiguration), in often kind of configuration structure, the ratio of ascending-descending subframes is all not identical, and system can carry out flexible configuration according to factors such as the traffic carrying capacitys of up-downgoing in community.7 kinds of concrete configurations are as shown in table 1, and wherein D represents descending sub frame, and U represents sub-frame of uplink, and S represents special subframe.As the evolution system of the TDDLTE of guarantee backwards compatibility, (LTE-A of current generation refers generally to LTERelease-10 version to TDDLTE-A, be called for short Rel-10, also may comprise the later version of Rel-10, such as Release-11 etc. later) system can keep the frame structure identical with TDDLTE.
Subframe uplink-downlink configuration form in table 1TDDLTE system
Hybrid automatic repeat-request (HARQ, Hybrid-AutomaticRepeatRequest) is error control method important in block transmission system, effectively can improve transmission reliability.In HARQ transmission, for the transmission of business datum, need to obtain corresponding feedback information, namely confirm or non-acknowledgement (ACK/NACK, Acknowledge/NegativeAcknowledge) information, to determine whether that needs retransmit.
Introduce relay station in TDDLTE-A system after, be equivalent to the many jumpings of the transmission of data, the communication pattern of namely original base station-terminal there occurs change.For double bounce system, the communication pattern accepting the terminal of relay station service becomes the mode of base station-relay station-terminal.At this time, just need in uplink and downlink resource, to divide the communication resource (corresponding interface be also referred to as Un interface) of a part as base station-relay station respectively, namely mark the communication of a part of subframe for base station-relay station, these subframes are called as relay sub-frame (or Un subframe).For downlink relay sub-frame, relay station indicates that it is Multicast Broadcast Single Frequency Network (MBSFN to subordinate Rel-8 terminal, MulticastBroadcastSingleFrequencyNetwork) subframe, and do not go in the resource of Rel-8 terminal outside the control domain of MBSFN sub-frame to receive, thus ensure relay station when carrying out downlink reception for the compatibility of Rel-8 terminal.For uplink relay subframe, by not dispatching the uplink service of subordinate terminal, while avoiding the up transmitting of relay station, terminal is also in up transmitting.
But, in the related, the not sequence problem of clear and definite repeated link uplink traffic transmission and corresponding descending ACK/NACK transmission of feedback information, and for base station, to cause not knowing when transmit this feedback information, corresponding relay station does not know when this receives this feedback information yet, and this may cause repeated link HARQ transmission efficiency to reduce, and then impacts the transfer of data of relay station subordinate terminal.
Can ensure that for there is no scheme in correlation technique relay link downlink ACK/NACK feedback information correctly transmits, and then the problem of reliability of business data transmission between base station and relay station can not be ensured, not yet propose effective solution at present.
Summary of the invention
Main purpose of the present invention is to provide downlink feedback information for trunk link transmission time sequence defining method and device in a kind of TDDLTE-A, with at least solve in above-mentioned correlation technique do not have scheme to ensure relay link downlink ACK/NACK feedback information correctly transmits, and then the problem of reliability of business data transmission between base station and relay station can not be ensured.
According to an aspect of the present invention, provide downlink feedback information for trunk link transmission time sequence defining method in a kind of TDDLTE-A, comprising:
According to the relay sub-frame configuration set under subframe uplink-downlink configuration in TDDLTE-A system, determine downlink feedback information for trunk link transmission time sequence;
Wherein, described sequential refers to the sequential relationship of the transmission of repeated link uplink business data and the transmission of corresponding downlink feedback information.
Preferably, also comprise:
Base station receives the repeated link uplink business data that relay station sends, and determines the subframe position that described downlink feedback information transmits and send described downlink feedback information according to described sequential in described subframe; And
Described relay station is determined described downlink feedback information transmission subframe position according to described sequential and receive described downlink feedback information in described subframe.
Preferably, describedly determine downlink feedback information for trunk link transmission time sequence, comprising:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 1, when comprising subframe 3 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 9 of current wireless frame;
When comprising subframe 4 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 8 correspondence transmits in the subframe 4 of next radio frames.
Preferably, describedly determine downlink feedback information for trunk link transmission time sequence, comprising:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 2, when comprising subframe 2 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 2 correspondence transmits in the subframe 8 of current wireless frame;
When comprising subframe 3 and 7 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 7 correspondence transmits in the subframe 3 of next radio frames.
Preferably, describedly determine downlink feedback information for trunk link transmission time sequence, comprising:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 3, when comprising subframe 2 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 2 correspondence transmits in the subframe 8 of current wireless frame;
When comprising subframe 3 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 9 of current wireless frame;
When only comprising subframe 3 and 7 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 7 of current wireless frame;
When only comprising subframe 3 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 8 of current wireless frame;
When only comprising subframe 3,7 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 7 or 8 of current wireless frame;
When only comprising subframe 4 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 4 correspondence transmits in the subframe 9 of current wireless frame.
Preferably, describedly determine downlink feedback information for trunk link transmission time sequence, comprising:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 4, when comprising subframe 2 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 2 correspondence transmits in the subframe 8 of current wireless frame;
When comprising subframe 3 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 9 of current wireless frame.
Preferably, describedly determine downlink feedback information for trunk link transmission time sequence, comprising:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 6, when comprising subframe 4 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 4 correspondence transmits in the subframe 9 of current wireless frame.
Preferably, described downlink feedback information is identified by the new data instruction NDI and/or repeated link physical mixed HARQ HARQ indicating channel R-PHICH in uplink authorization ULgrant.
According to a further aspect in the invention, provide downlink feedback information for trunk link transmission time sequence determining device in a kind of TDDLTE-A, comprising:
Selected cell, for selecting the relay sub-frame configuration set under subframe uplink-downlink configuration in TDDLTE-A system;
Determining unit, for according to the relay sub-frame configuration set under the subframe uplink-downlink configuration selected, determines downlink feedback information for trunk link transmission time sequence; Wherein, described sequential refers to the sequential relationship of the transmission of repeated link uplink business data and the transmission of corresponding downlink feedback information.
Preferably, described determining unit is further used for:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 1, when comprising subframe 3 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 9 of current wireless frame; And
When comprising subframe 4 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 8 correspondence transmits in the subframe 4 of next radio frames.
Preferably, described determining unit is further used for:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 2, when comprising subframe 2 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 2 correspondence transmits in the subframe 8 of current wireless frame;
When comprising subframe 3 and 7 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 7 correspondence transmits in the subframe 3 of next radio frames.
Preferably, described determining unit is further used for:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 3, when comprising subframe 2 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 2 correspondence transmits in the subframe 8 of current wireless frame;
When comprising subframe 3 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 9 of current wireless frame;
When only comprising subframe 3 and 7 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 7 of current wireless frame;
When only comprising subframe 3 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 8 of current wireless frame;
When only comprising subframe 3,7 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 7 or 8 of current wireless frame;
When only comprising subframe 4 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 4 correspondence transmits in the subframe 9 of current wireless frame.
Preferably, described determining unit is further used for:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 4, when comprising subframe 2 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 2 correspondence transmits in the subframe 8 of current wireless frame;
When comprising subframe 3 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 9 of current wireless frame.
Preferably, described determining unit is further used for:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 6, when comprising subframe 4 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 4 correspondence transmits in the subframe 9 of current wireless frame.
Pass through the present invention, according to the relay sub-frame configuration set under subframe uplink-downlink configuration in TDDLTE-A system, determine downlink feedback information for trunk link transmission time sequence, for base station, when feeding back downlink feedback information can be known, corresponding relay station also can know the downlink feedback information when receiving base station and send, the reliability of transfer of data between abundant guarantee base station and relay station, avoid the problem that repeated link HARQ transmission efficiency reduces, thus avoid impacting the transfer of data of relay station subordinate terminal, ensure that the backwards compatibility for terminal.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the radio frames that correlation technique provides;
Fig. 2 is that the base station that provides of the embodiment of the present invention and relay station carry out the process chart of transfer of data according to the sequential determined;
Fig. 3 is the process chart according to the relay sub-frame configuration set determination downlink feedback information transmission time sequence under subframe uplink-downlink configuration in TDDLTE-A system that the embodiment of the present invention provides;
Fig. 4 is the structural representation of downlink feedback information for trunk link transmission time sequence determining device in the TDDLTE-A that provides of the embodiment of the present invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
In the HARQ transmission of communication system, transmitting terminal, after service data transmission, needs to obtain a feedback information (ACK/NACK) from receiving terminal, to determine whether this business datum is transmitted correctly.Consider HARQ transmission efficiency, transmitting terminal and receiving terminal all need to know for sure the subframe position of transmission of feedback information.Do not consider the details of TDD system relay link downlink ACK/NACK transmission of feedback information sequential in correlation technique, namely relay station is after transmission uplink business data, and downlink feedback information is transmitted wherein in base station, and relay station receives this downlink feedback information wherein.After determining this sequential relationship, guarantee relay station effectively obtains descending ACK/NACK feedback information, ensures the efficiency of ascending HARQ transmission.
For solving the problems of the technologies described above, embodiments provide the defining method of downlink feedback information for trunk link transmission time sequence in a kind of TDDLTE-A, comprise: according to the relay sub-frame configuration set under subframe uplink-downlink configuration in TDDLTE-A system, determine downlink feedback information for trunk link transmission time sequence; Wherein, downlink feedback information for trunk link transmission time sequence refers to the sequential relationship of the transmission of repeated link uplink business data and the transmission of corresponding downlink feedback information.
When implementing, the downlink feedback information that the embodiment of the present invention is mentioned is often referred to confirmation/non-acknowledgement ACK/NACK information, certainly, in the subsequent applications of the embodiment of the present invention, also may comprise other downlink feedback information, concrete which kind of feedback information that adopts is determined according to actual conditions.
In embodiments of the present invention, the downlink feedback information transmission time sequence relation of repeated link uplink traffic transmission is determined according to the repeated link sub-frame configuration supported in TDD system under the subframe uplink-downlink configuration of relay transmission and described subframe uplink-downlink configuration, repeated link sub-frame configuration uniquely determines the sequential relationship of repeated link uplink traffic transmission and descending ACK/NACK transmission of feedback information, that is:, after relay sub-frame configuration is determined in base station, the sequential relationship of transmitting uplink data and downlink feedback information transmission can be determined; Relay station is after acquisition relay sub-frame configuration information, and can determine the sequential relationship that downlink feedback information transmits, also namely downlink feedback information for trunk link transmission time sequence follows relay sub-frame configuration one_to_one corresponding.The method that the embodiment of the present invention provides has taken into full account the flexibility of relay sub-frame configuration, and the reasonability of relay link downlink feedback transmission and re-transmission timing intervals, ensure the reliability of transfer of data between base station and relay station and implement simple (without the need to extra signaling indication feedback information transmission position) in systems in practice; Thus the impact avoided for relay station subordinate terminal transfer of data, ensure that the backwards compatibility for terminal.
During enforcement, after downlink feedback information for trunk link transmission time sequence is determined, base station and relay station all can carry out transfer of data according to the sequential determined, concrete handling process as shown in Figure 2, comprising:
Step 202, according to the relay sub-frame configuration set under subframe uplink-downlink configuration in TDDLTE-A system, determine downlink feedback information for trunk link transmission time sequence;
Step 204, base station receive the repeated link uplink business data that relay station sends, and the subframe position transmitted according to sequential determination downlink feedback information also sends downlink feedback information in subframe;
Step 206, relay station transmit subframe position according to downlink feedback information transmission time sequence determination downlink feedback information and receive downlink feedback information in subframes.
Generally, the transmission time sequence demand fulfillment processing delay of business data transmission and corresponding ACK/NACK feedback information.Namely after receiving terminal receives business datum, enough processing times are needed to carry out demodulation, decoding and cyclic redundancy check (CRC) (CyclicRedundantCheck, CRC) verification waits operation, and could determine should to transmitting terminal feeding back ACK or nack message.Simultaneously, after transmitting terminal receives feedback information, also time enough process is needed to retransmit or the new data (coding and modulation etc.) transmitted, in LTE, it is generally acknowledged that the time delay of these two sequential is minimum for 4ms, after namely subframe n receives data, generally meeting in subframe position the subframe being more than or equal to n+4 feeds back, and after subframe n+4 receiving feedback information, meet in subframe position the subframe being more than or equal to (n+4)+4 and carry out retransmitting or new data transmission.Therefore, downlink feedback information for trunk link transmission time sequence also needs to follow this principle.On the other hand, the definition of downlink feedback information transmission time sequence should consider delay problem, namely above-mentioned timing intervals can not be too large, the time delay that too conference causes business to be transmitted increases, then the propagation delay time of the following terminal of relay station is caused to increase, can be adopted one preferably execution mode herein: a default feedback delay is set, only select feedback delay to be less than default feedback delay downlink feedback information transmission time sequence; Concrete handling process is as shown in Figure 3:
Step 302, under each subframe uplink-downlink configuration, feedback delay is selected to be less than the relay sub-frame configuration set of default feedback delay;
Step 304, according to select relay sub-frame configuration set determination downlink feedback information transmission time sequence.
Wherein, default feedback delay depends on transport service type, and it is different that different business presets feedback delay value, and the default feedback delay of partial service is comparatively large, and the default feedback delay of partial service is less, and concrete default feedback delay is determined according to actual conditions.
Mention subframe uplink-downlink configuration in correlation technique and have 7 kinds, specifically see table 1, but owing to determining that subframe uplink-downlink configuration 0 and subframe uplink-downlink configuration 5 do not support relay transmission in TDDRel-10 at present, therefore, the situation of subframe uplink-downlink configuration 0 and subframe uplink-downlink configuration 5 is not all comprised in various embodiments of the present invention.
Embodiment one: subframe uplink-downlink configuration is subframe uplink-downlink configuration 1
Subframe uplink-downlink configuration 1 time, due to the restriction of MBSFN sub-frame configuration, only have descending sub frame 4 and 9 to be configured to downlink relay sub-frame, subframe 2,3,7 and 8 can be configured to uplink relay subframe.If subframe 2 is configured to uplink relay subframe, so subframe 9 meets the descending time delay relation of uplink traffic transmission, but re-transmission after subframe 9 transmission of feedback information next time can only be transmitted in the subframe 2 of next but one radio frames, and being equivalent to feedback delay is 13ms, and namely feedback delay is excessive.Therefore preferred subframe 2 is not configured to uplink relay subframe.In like manner can obtain, subframe 7 is not also configured to uplink relay subframe.Like this for configuring 3,4,8,9 of relay sub-frame, 5 kinds of different relay sub-frame configuration as shown in table 2 can be obtained according to ascending-descending subframes ratio difference.Described downlink feedback information for trunk link transmission time sequence can be summarized as: when comprising subframe 3 and 9 in subframe configuration set, and the feedback information of subframe 3 repeated link uplink business data transmission transmits in the subframe 9 of current wireless frame; When comprising subframe 4 and 8 in subframe configuration set, the feedback information of subframe 8 repeated link uplink business data transmission transmits in the subframe 4 of next radio frames.
By above-mentioned sequential relationship form description out, uplink traffic transmission under each relay sub-frame configuration and transmission of feedback information sequential relationship be as shown in Table 2: the uplink of the corresponding subframe n-k of downlink feedback information in subframe n, wherein, n is subframe index, namely the subframe numbering in radio frames, scope is from 0-9; K is feedback delay, is numeral corresponding under subframe index in table two.In follow-up description, DL represents descending sub frame, and UL represents sub-frame of uplink.
The relay sub-frame configuration of table 2:TDD subframe uplink-downlink configuration 1 and uplink feedback sequential k value table
In table 2, just list possible relay sub-frame configuration situation, the relay sub-frame configuration do not represented under this configuration only has these several, does not also represent cited relay sub-frame configuration and all can be supported.
Embodiment two: subframe uplink-downlink configuration is subframe uplink-downlink configuration 2
Subframe uplink-downlink configuration 2 times, descending sub frame 3,4,8 and 9 can be configured to downlink relay sub-frame, and subframe 2 and 7 can be configured to uplink relay subframe.If subframe 2 is configured to uplink relay subframe, so subframe 8 and 9 meets the descending time delay relation of uplink traffic transmission, but re-transmission after subframe 9 transmission of feedback information next time can only be transmitted in the subframe 2 of next but one radio frames, and being equivalent to feedback delay is 13ms, and namely feedback delay is excessive.Therefore the downlink feedback information of preferred subframe 2 uplink traffic transmission transmits in subframe 8.In like manner can obtain, the downlink feedback information of subframe 7 uplink traffic transmission preferably transmits in subframe 3.Described downlink feedback information for trunk link transmission time sequence can be summarized as: when comprising subframe 2 and 8 in subframe configuration set, and the feedback information of subframe 2 repeated link uplink business data transmission transmits in the subframe 8 of current wireless frame; When comprising subframe 3 and 7 in subframe configuration set, the feedback information of subframe 7 repeated link uplink business data transmission transmits in the subframe 3 of next radio frames.
By above-mentioned sequential relationship form description out, can obtain the different relay sub-frame configuration of as shown in Table 3 10 kinds according to ascending-descending subframes ratio difference, the uplink traffic transmission under each relay sub-frame configuration and transmission of feedback information sequential relationship are as shown in the k in showing: the uplink of the corresponding subframe n-k of downlink feedback information in subframe n.
The relay sub-frame configuration of table 3:TDD subframe uplink-downlink configuration 2 and uplink feedback sequential k value table
In table 3, just list possible relay sub-frame configuration situation, the relay sub-frame configuration do not represented under this configuration only has these several, does not also represent cited relay sub-frame configuration and all can be supported.
Embodiment three: subframe uplink-downlink configuration is subframe uplink-downlink configuration 3
Subframe uplink-downlink configuration 3 times, descending sub frame 7,8 and 9 can be configured to downlink relay sub-frame, and subframe 2,3 and 4 can be configured to uplink relay subframe.According to the analysis of aforementioned subframe uplink-downlink configuration 1 with configuration 2, the corresponding relation of different proportion relay sub-frame configuration and corresponding downlink feedback information transmission time sequence can be obtained for 3 times equally for subframe uplink-downlink configuration, be summarized as follows: when comprising subframe 2 and 8 in subframe configuration set, the feedback information of subframe 2 repeated link uplink business data transmission transmits in the subframe 8 of current wireless frame; When comprising subframe 3 and 9 in subframe configuration set, the feedback information of subframe 3 repeated link uplink business data transmission transmits in the subframe 9 of current wireless frame; When only comprising subframe 3 and 7 in subframe configuration set, the feedback information of subframe 3 repeated link uplink business data transmission transmits in the subframe 7 of current wireless frame; When only comprising subframe 3 and 8 in subframe configuration set, the feedback information of subframe 3 repeated link uplink business data transmission transmits in the subframe 8 of current wireless frame; When only comprising subframe 3,7 and 8 in subframe configuration set, the feedback information of subframe 3 repeated link uplink business data transmission transmits in the subframe 7 or 8 of current wireless frame; When the sub-frame of uplink in subframe configuration set only comprises subframe 4, and when descending sub frame comprises subframe 9, the feedback information of subframe 4 repeated link uplink business data transmission transmits in the subframe 9 of current wireless frame.
By above-mentioned sequential relationship form description out, can obtain 25 kinds of different relay sub-frame configuration as shown in table 4 according to ascending-descending subframes ratio difference, the uplink traffic transmission under each relay sub-frame configuration and transmission of feedback information sequential relationship are as shown in the k in showing: the uplink of the corresponding subframe n-k of downlink feedback information in subframe n.For the transmission of feedback information sequential of relay sub-frame configuration index 9 correspondence in table 4, the feedback information of subframe 3 repeated link uplink business data transmission transmits in the subframe 7 or 8 of current wireless frame, if be 4 in the corresponding k value of the words of subframe 7 transmission, if be 5 in the k value of the words correspondence of subframe 8 transmission, in practical operation, these two values only have an existence, but are all enumerated out in table 4.
The relay sub-frame configuration of table 4:TDD subframe uplink-downlink configuration 3 and uplink feedback sequential k value table
In table 4, just list possible relay sub-frame configuration situation, the relay sub-frame configuration do not represented under this configuration only has these several, does not also represent cited relay sub-frame configuration and all can be supported.
Embodiment four: subframe uplink-downlink configuration is subframe uplink-downlink configuration 4
Subframe uplink-downlink configuration 4 times, descending sub frame 4,7,8 and 9 can be configured to downlink relay sub-frame, and subframe 2 and 3 can be configured to uplink relay subframe.According to the analysis of aforementioned subframe uplink-downlink configuration 1 with configuration 2, the corresponding relation of different proportion relay sub-frame configuration and corresponding downlink feedback information transmission time sequence can be obtained for 4 times equally for subframe uplink-downlink configuration, be summarized as follows: when comprising subframe 2 and 8 in subframe configuration set, the feedback information of subframe 2 repeated link uplink business data transmission transmits in the subframe 8 of current wireless frame; When comprising subframe 3 and 9 in subframe configuration set, the feedback information of subframe 3 repeated link uplink business data transmission transmits in the subframe 9 of current wireless frame.
By above-mentioned sequential relationship form description out, can obtain 20 kinds of different relay sub-frame configuration as shown in table 5 according to ascending-descending subframes ratio difference, the uplink traffic transmission under each relay sub-frame configuration and transmission of feedback information sequential relationship are as shown in the k in showing: the uplink of the corresponding subframe n-k of downlink feedback information in subframe n.
The relay sub-frame configuration of table 5:TDD subframe uplink-downlink configuration 4 and uplink feedback sequential k value table
In table 5, just list possible relay sub-frame configuration situation, the relay sub-frame configuration do not represented under this configuration only has these several, does not also represent cited relay sub-frame configuration and all can be supported.
Embodiment five: subframe uplink-downlink configuration is subframe uplink-downlink configuration 6
Subframe uplink-downlink configuration 6 times, descending sub frame 9 is only had to be configured to downlink relay sub-frame.Consider the feature that repeated link business is transmitted, generally think the no more than downlink relay sub-frame quantity of uplink relay subframe quantity, namely lower of this subframe uplink-downlink configuration supports the uplink and downlink relay sub-frame configuration of 1: 1.That is: when comprising subframe 4 and 9 in subframe configuration set, the feedback information of subframe 4 repeated link uplink business data transmission transmits in the subframe 9 of current wireless frame.With subframe uplink-downlink configuration 6 times relay sub-frame configuration of form description and an example of corresponding downlink feedback information transmission time sequence corresponding relation as shown in table 6.
The relay sub-frame configuration of table 6:TDD subframe uplink-downlink configuration 6 and uplink feedback sequential k value table
In table 6, just list possible relay sub-frame configuration situation, the relay sub-frame configuration do not represented under this configuration only has these several, does not also represent cited relay sub-frame configuration and all can be supported.
During enforcement, downlink feedback information can have multiple identification means, preferably, can be identified by the new data instruction NDI in uplink authorization ULgrant and/or repeated link physical mixed HARQ HARQ indicating channel (Relay-PhysicalHARQIdicatorChannel is called for short R-PHICH).
During the downlink feedback information for trunk link transmission time sequence defining method that the application embodiment of the present invention provides, be not limited to the specific embodiment that the embodiment of the present invention provides, if follow-up subframe uplink-downlink configuration 0,5 can carry out repeated link transfer of data, also this method can be applied, in like manner, in subsequent applications, this method scope of application also may be any one or more combination in subframe uplink-downlink configuration 1-4 and subframe uplink-downlink configuration 6.
Based on same inventive concept, the embodiment of the present invention additionally provides downlink feedback information for trunk link transmission time sequence determining device in a kind of time division duplex long evolving system TDDLTE-A, and be applied to relay station, concrete structure as shown in Figure 4, comprising:
Selected cell 401, for selecting the relay sub-frame configuration set under subframe uplink-downlink configuration in TDDLTE-A system;
Determining unit 402, for according to the relay sub-frame configuration set under the subframe uplink-downlink configuration selected, determines downlink feedback information for trunk link transmission time sequence; Wherein, sequential refers to the sequential relationship of the transmission of repeated link uplink business data and the transmission of corresponding downlink feedback information.
In one embodiment, determining unit 402 can be further used for:
When subframe uplink-downlink configuration is subframe uplink-downlink configuration 1, when comprising subframe 3 and 9 in relay sub-frame configuration set, determine that sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 9 of current wireless frame;
When comprising subframe 4 and 8 in relay sub-frame configuration set, determine that sequential is: the feedback information of the repeated link uplink business data transmission of subframe 8 correspondence transmits in the subframe 4 of next radio frames.
In one embodiment, determining unit 402 can be further used for:
When subframe uplink-downlink configuration is subframe uplink-downlink configuration 2, when comprising subframe 2 and 8 in relay sub-frame configuration set, determine that sequential is: the feedback information of the repeated link uplink business data transmission of subframe 2 correspondence transmits in the subframe 8 of current wireless frame;
When comprising subframe 3 and 7 in relay sub-frame configuration set, determine that sequential is: the feedback information of the repeated link uplink business data transmission of subframe 7 correspondence transmits in the subframe 3 of next radio frames.
In one embodiment, determining unit 402 can be further used for:
When subframe uplink-downlink configuration is subframe uplink-downlink configuration 3, when comprising subframe 2 and 8 in relay sub-frame configuration set, determine that sequential is: the feedback information of the repeated link uplink business data transmission of subframe 2 correspondence transmits in the subframe 8 of current wireless frame;
When comprising subframe 3 and 9 in relay sub-frame configuration set, determine that sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 9 of current wireless frame;
When only comprising subframe 3 and 7 in relay sub-frame configuration set, determine that sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 7 of current wireless frame;
When only comprising subframe 3 and 8 in relay sub-frame configuration set, determine that sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 8 of current wireless frame;
When only comprising subframe 3,7 and 8 in relay sub-frame configuration set, determine that sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 7 or 8 of current wireless frame;
When only comprising subframe 4 and 9 in relay sub-frame configuration set, determine that sequential is: the feedback information of the repeated link uplink business data transmission of subframe 4 correspondence transmits in the subframe 9 of current wireless frame.
In one embodiment, determining unit 402 can be further used for:
When subframe uplink-downlink configuration is subframe uplink-downlink configuration 4, when comprising subframe 2 and 8 in relay sub-frame configuration set, determine that sequential is: the feedback information of the repeated link uplink business data transmission of subframe 2 correspondence transmits in the subframe 8 of current wireless frame;
When comprising subframe 3 and 9 in relay sub-frame configuration set, determine that sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 9 of current wireless frame.
In one embodiment, determining unit 402 can be further used for:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 6, when comprising subframe 4 and 9 in relay sub-frame configuration set, determine that sequential is: the feedback information of the repeated link uplink business data transmission of subframe 4 correspondence transmits in the subframe 9 of current wireless frame.
As can be seen from the above description, present invention achieves following technique effect:
Above-described embodiment is according to the relay sub-frame configuration set under subframe uplink-downlink configuration in TDDLTE-A system, determine downlink feedback information for trunk link transmission time sequence, for base station, when feeding back downlink feedback information can be known, corresponding relay station also can know the downlink feedback information when receiving base station and send, the reliability of transfer of data between abundant guarantee base station and relay station, avoid the problem that repeated link HARQ transmission efficiency reduces, thus avoid impacting the transfer of data of relay station subordinate terminal, ensure that the backwards compatibility for terminal.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. a downlink feedback information for trunk link transmission time sequence defining method in time division duplex advanced long-term evolution system TDDLTE-A, is characterized in that, comprising:
In TDDLTE-A system under subframe uplink-downlink configuration, feedback delay is selected to be less than the relay sub-frame configuration set of default feedback delay;
According to the relay sub-frame configuration set selected, determine downlink feedback information for trunk link transmission time sequence;
Wherein, described sequential refers to the sequential relationship of the transmission of repeated link uplink business data and the transmission of corresponding downlink feedback information, and described default feedback delay depends on transport service type, and it is different that different transport service types presets feedback delay value.
2. method according to claim 1, is characterized in that, also comprises:
Base station receives the repeated link uplink business data that relay station sends, and determines the subframe position that described downlink feedback information transmits and send described downlink feedback information according to described sequential in described subframe; And
Described relay station is determined described downlink feedback information transmission subframe position according to described sequential and receive described downlink feedback information in described subframe.
3. method according to claim 1, is characterized in that, describedly determines downlink feedback information for trunk link transmission time sequence, comprising:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 1, when comprising subframe 3 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 9 of current wireless frame;
When comprising subframe 4 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 8 correspondence transmits in the subframe 4 of next radio frames.
4. method according to claim 1, is characterized in that, describedly determines downlink feedback information for trunk link transmission time sequence, comprising:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 2, when comprising subframe 2 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 2 correspondence transmits in the subframe 8 of current wireless frame;
When comprising subframe 3 and 7 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 7 correspondence transmits in the subframe 3 of next radio frames.
5. method according to claim 1, is characterized in that, describedly determines downlink feedback information for trunk link transmission time sequence, comprising:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 3, when comprising subframe 2 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 2 correspondence transmits in the subframe 8 of current wireless frame;
When comprising subframe 3 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 9 of current wireless frame;
When only comprising subframe 3 and 7 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 7 of current wireless frame;
When only comprising subframe 3 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 8 of current wireless frame;
When only comprising subframe 3,7 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 7 or 8 of current wireless frame;
When only comprising subframe 4 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 4 correspondence transmits in the subframe 9 of current wireless frame.
6. method according to claim 1, is characterized in that, describedly determines downlink feedback information for trunk link transmission time sequence, comprising:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 4, when comprising subframe 2 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 2 correspondence transmits in the subframe 8 of current wireless frame;
When comprising subframe 3 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 9 of current wireless frame.
7. method according to claim 1, is characterized in that, describedly determines downlink feedback information for trunk link transmission time sequence, comprising:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 6, when comprising subframe 4 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 4 correspondence transmits in the subframe 9 of current wireless frame.
8. the method according to any one of claim 1 to 7, it is characterized in that, described downlink feedback information is identified by the new data instruction NDI and/or repeated link physical mixed HARQ HARQ indicating channel R-PHICH in uplink authorization ULgrant.
9. a downlink feedback information for trunk link transmission time sequence determining device in time division duplex long evolving system TDDLTE-A, is characterized in that, comprising:
Selected cell, under subframe uplink-downlink configuration in TDDLTE-A system, selects feedback delay to be less than the relay sub-frame configuration set of default feedback delay;
Determining unit, for according to the relay sub-frame configuration set selected, determines downlink feedback information for trunk link transmission time sequence; Wherein, described sequential refers to the sequential relationship of the transmission of repeated link uplink business data and the transmission of corresponding downlink feedback information;
Wherein, described default feedback delay depends on transport service type, and it is different that different transport service types presets feedback delay value.
10. device according to claim 9, is characterized in that, described determining unit is further used for:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 1, when comprising subframe 3 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 9 of current wireless frame; And
When comprising subframe 4 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 8 correspondence transmits in the subframe 4 of next radio frames.
11. devices according to claim 9, is characterized in that, described determining unit is further used for:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 2, when comprising subframe 2 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 2 correspondence transmits in the subframe 8 of current wireless frame;
When comprising subframe 3 and 7 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 7 correspondence transmits in the subframe 3 of next radio frames.
12. devices according to claim 9, is characterized in that, described determining unit is further used for:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 3, when comprising subframe 2 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 2 correspondence transmits in the subframe 8 of current wireless frame;
When comprising subframe 3 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 9 of current wireless frame;
When only comprising subframe 3 and 7 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 7 of current wireless frame;
When only comprising subframe 3 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 8 of current wireless frame;
When only comprising subframe 3,7 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 7 or 8 of current wireless frame;
When only comprising subframe 4 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 4 correspondence transmits in the subframe 9 of current wireless frame.
13. devices according to claim 9, is characterized in that, described determining unit is further used for:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 4, when comprising subframe 2 and 8 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 2 correspondence transmits in the subframe 8 of current wireless frame;
When comprising subframe 3 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 3 correspondence transmits in the subframe 9 of current wireless frame.
14. devices according to claim 9, is characterized in that, described determining unit is further used for:
When described subframe uplink-downlink configuration is subframe uplink-downlink configuration 6, when comprising subframe 4 and 9 in described relay sub-frame configuration set, determine that described sequential is: the feedback information of the repeated link uplink business data transmission of subframe 4 correspondence transmits in the subframe 9 of current wireless frame.
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| CN103580829B (en) * | 2012-08-10 | 2018-11-20 | 南京中兴新软件有限责任公司 | A kind of PHICH treating method and apparatus under tdd mode |
| EP3550745B1 (en) * | 2016-12-30 | 2022-05-11 | Huawei Technologies Co., Ltd. | Communication method, network device, and terminal device |
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| CN101741452A (en) * | 2008-11-07 | 2010-06-16 | 华为技术有限公司 | Relay transmission method and network node |
| WO2010078583A2 (en) * | 2009-01-05 | 2010-07-08 | Intel Corporation | Harq timing control in wireless communication systems |
| CN102377550A (en) * | 2010-08-13 | 2012-03-14 | 中兴通讯股份有限公司 | Method and device for transmitting relay link HARQ (Hybrid Automatic Repeat Request) of time division duplex system |
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| CN101741452A (en) * | 2008-11-07 | 2010-06-16 | 华为技术有限公司 | Relay transmission method and network node |
| WO2010078583A2 (en) * | 2009-01-05 | 2010-07-08 | Intel Corporation | Harq timing control in wireless communication systems |
| CN102377550A (en) * | 2010-08-13 | 2012-03-14 | 中兴通讯股份有限公司 | Method and device for transmitting relay link HARQ (Hybrid Automatic Repeat Request) of time division duplex system |
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