CN1984072A

CN1984072A - Method for transmitting scheduling information, user terminal and base-station node

Info

Publication number: CN1984072A
Application number: CNA200610084995XA
Authority: CN
Inventors: 刘晟
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-05-29
Filing date: 2006-05-29
Publication date: 2007-06-20
Anticipated expiration: 2026-05-29
Also published as: CN100484102C

Abstract

The invention relates to mobile communication field; disclose a dispatching information transmission method and user terminal and the base station node, so that the base station node can obtain the latest SI report, thereby ensure performances of E-DCH ascending grouped dispatching. In the invention, the user terminal record the first PDU sent time in every HARQ process, when the first PDU including SI in anyone of HARQ process is successfully sent, judge whether there is second transmitting PDU including SI in other HARQ process, if there is, then further judge that if the SI included in second PDU is fresher than that of transmitted first PDU, if not, then abandon the SI included in second PDU. At the beginning of abandoning, if the second PDU contains SI and high-level data, users terminal instruct the base station nodes the invalidation of SI in second PDU; If the second PDU just includes SI, then the user terminal terminate the retransmission of the second PDU.

Description

Scheduling information transmission method, user terminal and base station node

Technical Field

The present invention relates to the field of mobile communication, and in particular, to a High Speed Uplink Packet Access (HSUPA) technology.

Background

The Universal Mobile Telecommunications System (UMTS) is one of The major Third-Generation Mobile communications (3G) systems in The world. The UMTS system consists of three parts, namely a Core Network (CN), a universal mobile telecommunications system Terrestrial radio access Network (UMTS Terrestrial radio access Network, UTRAN) and a user terminal. The interface between the CN and the UTRAN is defined as Iu interface, and the interface between the UTRAN and the user terminal is defined as Uu interface.

The earliest protocol version of UMTS is R99, in which the bearers for both uplink and downlink traffic are based on Dedicated Channels (DCH), and the achievable data transmission rates are 384 Kbps. However, as the demand of users for transmitting High-Speed data is higher and higher, the UMTS standard organization subsequently proposes protocol specifications of three stages, namely R4, R5 and R6, introduces a High-Speed Downlink Packet Access (HSDPA) technology and a High-Speed Uplink Packet Access (HSUPA) technology, and can respectively provide peak rates of 14.4Mbps and 5.76Mbps, and simultaneously, greatly improve the spectrum efficiency.

Among them, HSUPA is also called Enhanced-Dedicated channel (E-DCH), and the main features of HSUPA in R6 version include: a 2ms short frame or a 10ms frame is adopted, a Hybrid adaptive repeat request (HARQ for short) is adopted in a physical layer, and a fast scheduling technology of an uplink base station and the like are adopted. In order to realize high-efficiency transmission of uplink Data of a user, HSUPA adds two uplink Physical channels and three downlink Physical channels, which are an E-DCH Dedicated Physical Data Channel (E-DPDCH) for transmitting Data, an E-DCH Dedicated Physical Control Channel (E-DCH Dedicated Physical Control Channel, E-DPCCH) for transmitting Physical layer signaling, an E-DCH Absolute Grant Channel (E-DCH Absolute Grant Channel, E-AGCH) and an E-DCH Relative Grant Channel (E-DCH Relative Grant Channel, E-RGCH) for controlling an uplink transmission rate of a user, and an E-DCH HARQ Indicator Channel (E-DCH HARQ Indicator Channel) for carrying ACK (acknowledgement)/NACK (not acknowledgement) information from a base station Node B, abbreviated as "E-HICH"). In addition to the addition of the physical layer channel, in order to cooperate with HSUPA, two sublayers, namely MAC-e (e refers to enhancement) and MAC-es, are introduced into a Medium Access Control (MAC for short) to support HARQ and fast scheduling. MAC-e and MAC-es lie between the physical layer and MAC-d (d means dedicated).

In particular, the protocol related to E-DCH over the Radio air interface (Uu interface) mainly relates to the physical layer, the MAC layer and the corresponding Radio Resource Control (RRC) layer. Wherein, the MAC layer of the E-DCH comprises three MAC sub-layers of MAC-E, MAC-es and MAC-d. At the UTRAN side, the MAC-e entity is in the base station node, the MAC-es entity is in the Serving Radio Network Controller (SRNC), and at the user terminal side, the MAC-e and MAC-es are not distinguished and exist in the same functional unit.

As shown in fig. 1, at a sending end of the E-DCH, that is, at a user terminal side, a Dedicated Traffic Channel (DTCH) of a logical Channel and a Dedicated Control Channel (DCCH) from a Radio Link Control (RLC) layer enter MAC-d to form a MAC-d Protocol Data Unit (PDU), a MAC-d PDU of the same logical Channel forms a MAC-es PDU through MAC-es, and the MAC-es PDU further forms a MAC-E PDU in the MAC-E and is mapped to a physical layer through the E-DCH transport Channel.

The MAC layer structure of the E-DCH at the UTRAN side is shown in figure 2, at the receiving end of the E-DCH, namely the UTRAN side, MAC-E PDU from the E-DCH transmission channel is firstly subjected to MAC-E de-multiplexing processing in a base station node to form MAC-es PDU, then the MAC-es PDU is transmitted to the SRNC and is firstly subjected to macro diversity selection, reordering and the like, then each MAC-d PDU is resolved and sent to a MAC-d unit, and finally the MAC-d PDU is sent to the RLC layer through the logic channels DTCH and DCCH.

The MAC-E PDU comprises a header portion and a payload portion, and is structured as shown in fig. 3, wherein the payload portion of the MAC-E PDU comprises a plurality of Scheduling Information (Scheduling Information, abbreviated as "SI") with a length of 18 bits, which are multiplexed together to form the MAC-es PDU, optionally used for uplink fast packet Scheduling, and a possible padding field for making the length of the MAC-E PDU equal to the specified E-DCH transport block length; the header of the MAC-e PDU is composed of the corresponding parameters DDI field and N field of each MAC-es PDU, both of which are 6 bits in length, and in addition, the header of the MAC-e PDU also includes an optional DDI0 field.

According to the protocol specification TS25.321 of 3GPP, the format of MAC-E PDU has the following four structures according to whether SI is transmitted or not and the residual bit number D, wherein SI is measurement information which is depended by the E-DCH for carrying out uplink fast packet scheduling based on the base station node, and the E-DCH supports two SI reporting modes based on cycle triggering and event triggering at present; the remaining number of bits D is the number of bits remaining from the E-DCH transport block length minus the length of the N MAC-es PDUs contained in the MAC-ePDU and the corresponding N DDIs and N fields contained in the MAC-E PDU header.

(a) Separately transmitting a MAC-e PDU of the SI, the MAC-e PDU consisting of the 18-bit long SI;

(b) when the residual bit number D is less than 18 bits, the SI is not transmitted and the residual bits are filling bits;

(c) when the residual bit number D is equal to or larger than 18 bits but smaller than 24 bits, the SI is directly concatenated at the end of the MAC-es PDU, and the rest bits are filling bits (0-5 bits);

(d) when the remaining bit number D is equal to or greater than 24 bits, the SI is concatenated at the end of the MAC-es PDU, and a special DDI, DDI0 ═ 111111, is appended at the end of the MAC-e PDU header, and the remaining bits are padding bits.

The MAC-E PDU is transmitted on the E-DPDCH and the associated control signaling is transmitted on the E-DPCCH. The information transmitted on the E-DPCCH includes: a Retransmission Sequence Number (RSN), an E-DCH Transport format combination Indicator (E-DCH Transport format combination Indicator, E-TFCI), and a Happy bit, which occupy 2 bits, 7 bits, and 1 bit, respectively. The RSN is mainly used for indicating new data in a HARQ process and indicating a redundancy version of retransmission, a 'Happy' bit is mainly used for auxiliary control of uplink packet scheduling, and the value range of the E-TFCI is 0-127 and used for indicating the size of the MAC-E PDU, namely the size of an E-DCH transmission block. According to the specification TS25.321 of 3GPP, the MAC-E pdu in 2ms Transmission Time Interval (TTI) mode and 10ms TTI mode can both configure one of two E-DCH transport block size sets, fig. 4 and 5 respectively show two E-DCH transport block size sets in 2ms TTI mode, and fig. 6 and 7 respectively show two E-DCH transport block size sets in 10ms TTI mode. The transport block with the E-DCH transport block size of 18 bits indicated by E-TFCI ═ 0 is mainly used for transmitting the uplink SI alone.

Currently, there are two ways to transmit SI on the E-DPDCH, one is by means of the MAC-E PDU alone, in which case the entire MAC-E PDU consists of the 18-bit long SI, and the other is by means of the SI being transmitted together with the data in the MAC-E PDU, in which case the SI is placed at the end of each MAC-es PDU.

Since the E-DPDCH employs HARQ operation, transmission of SI also supports HARQ operation. According to the TS25.321 of the current version, the maximum transmission times are fixed 8 times for the case of single SI transmission; for the case where SI is transmitted together with data in a MAC-E PDU, the maximum number of retransmissions is determined by the HARQ configuration parameter of the E-DCH MAC-d flow in the data portion of the MAC-E PDU that is transmitted simultaneously with SI, which is given by the "E-DCH MAC-d flow maximum number of retransmissions (E-DCH MAC-d flow maximum number of retransmissions)" of the Information Element (IE) of the RRC, and the value range is 0-15 times.

Since the HARQ operation in E-DCH is synchronized, i.e. the initial transmission and retransmission of a certain HARQ process always occurs at a fixed time, there are 8 total parallel HARQ processes for the 2ms TTI mode and 4 total parallel HARQ processes for the 10ms TTI mode. Therefore, the retransmission time of one HARQ process in E-DCH (i.e. the time from when the ue sends a MAC-E PDU from a TTI to when the ue receives a non-received response message NACK from the base station node and sets the time for retransmitting data) is 8 × 2ms, i.e. 16ms for the 2ms TTI mode; for the 10ms TTI mode, 4 × 10ms, i.e., 40 ms.

In practical applications, the above scheme has the following problems: the base station node may not be able to acquire the latest SI report, thereby affecting the performance of E-DCH uplink packet scheduling.

The main reason for this is that in both ways of transmitting SI on E-DPDCH, for a 2ms TTI, if SI is transmitted alone, a maximum of 8 transmissions are required, i.e. a maximum of 8 × 16ms, i.e. 128ms, is required, and if SI is transmitted together with data in a MAC-E PDU, a maximum of 15 retransmissions are required, i.e. a maximum of 16 × 16ms, i.e. 256ms, is required; for a 10ms TTI, a maximum of 8 transmissions are required, i.e. a maximum of 8 × 40ms, i.e. 320ms, is required if SI is transmitted alone, and a maximum of 15 retransmissions are possible, i.e. a maximum of 16 × 40ms, i.e. 640ms, is required if SI is transmitted together with data in a MAC-e PDU.

However, when the user terminal has an event specified in the SI report triggering mechanism, reaches a period specified in the SI report triggering mechanism, or has the remaining number of bits D of the MAC-e PDU of a certain TTI equal to or greater than 18, the user terminal needs to send a new SI report to the base station node. Furthermore, since SI transmission has a very high priority, even if SI transmission is allowed on HARQ processes with a service Grant parameter of a special value "Zero Grant" as well as on HARQ processes in an inactive state, it is not difficult to find that a user terminal is highly likely to transmit a new SI to a base station node during HARQ retransmission of a certain SI report.

As shown in fig. 8, since other HARQ processes except the HARQ process for retransmitting the old SI report may transmit a new SI report, and before the retransmission of the old SI report is completed, if the new SI report is already successfully received by the base station node, the new SI report is overwritten after the transmission of the old SI report is successfully completed, so that the SI report that is not the latest SI report acquired by the base station node is obtained, and the performance of uplink packet scheduling is greatly reduced.

Disclosure of Invention

In view of the above, the present invention provides a scheduling information transmission method, a user equipment and a base station node, so that the base station node can obtain a latest SI report, thereby ensuring performance of E-DCH uplink packet scheduling.

In order to achieve the above object, the present invention provides a method for transmitting scheduling information in an enhanced dedicated channel, comprising the following steps:

when a first Protocol Data Unit (PDU) containing scheduling information in any hybrid adaptive repeat request (HARQ) process in a user terminal is successfully received by a Radio Link Set (RLS) containing a serving cell, if a second PDU which is transmitted in other HARQ processes contains the scheduling information and the first transmission time of the second PDU is earlier than that of the first PDU, the user terminal discards the scheduling information contained in the second PDU.

Wherein the step of discarding, by the user equipment, the scheduling information included in the second PDU further comprises the substeps of:

if the second PDU contains scheduling information and high-level data, the user terminal indicates the base station node that the scheduling information in the second PDU is invalid;

and if the second PDU contains the scheduling information and does not contain the high-level data, the user terminal terminates the retransmission of the second PDU.

In addition, the method also comprises the following steps:

and recording the first transmission time when the PDU in the HARQ process is transmitted for the first time.

Further in the method, the first transmission time is represented by a connection frame number and a subframe number.

Further in the method, the user terminal indicates to the base station node that the scheduling information in the second PDU is invalid by setting control information corresponding to the second PDU in a dedicated physical control channel, E-DPCCH, of an enhanced dedicated channel.

Further in the method, the user terminal indicates to the base station node that the scheduling information in the second PDU is invalid by one of:

when the second PDU is retransmitted, setting a transport format combination indication E-TFCI field of an enhanced dedicated channel corresponding to the second PDU in the E-DPCCH control information as a specified value; or,

when the second PDU is retransmitted, setting an E-TFCI field corresponding to the second PDU in the E-DPCCH control information as a value different from that of the initial transmission; or,

and when the second PDU is retransmitted, setting a 'Happy' bit corresponding to the second PDU in the E-DPCCH control information to a value indicating that the scheduling information is invalid, wherein the 'Happy' bit in the E-DPCCH control information is redefined to indicate whether the scheduling information is valid or not during retransmission.

In addition, the method also comprises the following steps:

when the base station node successfully receives a third PDU containing scheduling information in the HARQ process, judging whether a fourth PDU containing scheduling information in other HARQ processes is successfully received in a preset time period before, if so, comparing the transmission times of the third PDU and the fourth PDU, if the transmission times of the third PDU is greater than that of the fourth PDU, judging the scheduling information in the third PDU as invalid, otherwise, judging the scheduling information in the third PDU as valid;

the preset time is the time length from the time when the user terminal sends the PDU to the time when the user terminal receives the feedback information of the base station node to the PDU.

In addition, the method also comprises the following steps:

and if the base station node is indicated that the scheduling information in the PDU is invalid when receiving the PDU or judges that the scheduling information in the received PDU is invalid, discarding the scheduling information in the PDU.

The invention also provides a user terminal, which comprises an HARQ entity, wherein the HARQ entity comprises at least two HARQ processes, and also comprises a judging module, wherein the judging module is used for judging whether the second PDU transmitted on other HARQ processes contains the scheduling information when the first protocol data unit PDU containing the scheduling information on any HARQ process of the HARQ entity is successfully received by the radio link set RLS containing the service cell, and the first transmission time of the second PDU is earlier than that of the first PDU, if so, the scheduling information contained in the second PDU is abandoned.

When the scheduling information contained in the second PDU is discarded, the judging module further judges the content carried in the second PDU, if the second PDU contains the scheduling information and high-level data at the same time, the control information corresponding to the second PDU in the E-DPCCH is set, and the base station node is indicated that the scheduling information in the second PDU is invalid; and if the second PDU contains the scheduling information and does not contain the high-level data, the HARQ entity is instructed to terminate the retransmission of the second PDU.

The invention also provides a base station node, which comprises an HARQ entity and a judging module, wherein the HARQ entity comprises at least two HARQ processes, and the judging module is used for judging whether the control information on the E-DPCCH corresponding to the PDU indicates that the scheduling information in the PDU is invalid or not when any HARQ process successfully receives the PDU containing the scheduling information, and if so, the scheduling information in the PDU is discarded.

The judging module is further configured to, when any HARQ process successfully receives a third PDU containing scheduling information, judge whether a fourth PDU containing scheduling information in another HARQ process has been successfully received within a predetermined time period before that, if yes, compare the transmission times of the third PDU with the fourth PDU, and if the transmission times of the third PDU is greater than the transmission times of the fourth PDU, instruct the HARQ entity to discard the scheduling information in the third PDU;

the preset time length is the time length from the time when the user terminal sends the PDU to the time when the user terminal receives the feedback information of the base station node to the PDU.

The main difference between the technical scheme of the present invention and the prior art can be found by comparing, in the user terminal, the first transmission time of the PDU in each HARQ process is recorded, when the first PDU containing the SI in any HARQ process is successfully transmitted, whether a second PDU containing the SI is being transmitted in other HARQ processes is determined, if yes, whether the SI contained in the second PDU is newer than the SI contained in the first PDU which is successfully transmitted is further determined, and if not, the SI contained in the second PDU is discarded. The base station node is ensured to be capable of obtaining the latest SI report from the user terminal in time, the problem that the new SI report is possibly covered by the old SI report due to the retransmission of the SI is avoided, and the performance of the E-DCH uplink packet scheduling is ensured.

If the second PDU contains both SI and higher layer data, the user terminal discards the SI contained in the second PDU by indicating to the base station node that the SI in the second PDU is invalid; if the second PDU only contains SI but not higher layer data, the user terminal discards the SI contained in the second PDU by terminating the retransmission of the second PDU, effectively saving system resources.

The user terminal indicates that the SI contained in the second PDU of the base station node is invalid by setting the control signaling information of the E-DPCCH in the prior art, so that the scheme of the invention is easier to realize.

When the base station node successfully receives the third PDU containing the SI in the HARQ process, the base station node compares the transmission times of the currently and successfully received third PDU and the fourth PDU containing the SI in other HARQ processes successfully received in the previous preset time length to judge whether the SI in the currently and successfully received third PDU is the latest SI, and if not, the base station node judges the SI in the currently and successfully received third PDU as invalid. The predetermined Time length is a Time length from the Time when the user terminal sends the PDU to the Time when the user terminal receives the feedback information of the PDU from the base station node, that is, a Round Trip Time (RTT). Therefore, the base station node is further ensured to obtain the latest SI report, and the performance of E-DCH uplink packet scheduling is ensured.

Drawings

Fig. 1 is a diagram illustrating an E-DCH MAC structure of a ue in the prior art;

FIG. 2 is a diagram of the E-DCH MAC structure on the UTRAN side in the prior art;

FIG. 3 is a diagram illustrating a structure of a MAC-e PDU in the prior art;

FIG. 4 is a diagram of E-DCH data transport block set #0 in a 2ms TTI mode in the prior art;

FIG. 5 is a diagram of E-DCH data transport block set #1 in a 2ms TTI mode in the prior art;

FIG. 6 is a diagram of E-DCH data transport block set #0 in the 10ms TTI mode in the prior art;

FIG. 7 is a diagram of E-DCH data transport block set #1 in a 10ms TTI mode in the prior art;

fig. 8 is a diagram illustrating transmission of SI reports by multiple HARQ processes in the prior art;

fig. 9 is a flowchart of a transmission method of SI in E-DCH according to a first embodiment of the present invention;

fig. 10 is a schematic structural diagram of a user terminal according to a third embodiment of the present invention;

fig. 11 is a schematic diagram of a base station node structure according to a fourth embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

The core of the invention is that the user terminal records the first transmission time of the PDU in each HARQ process, when the first PDU containing SI in any HARQ process is successfully transmitted, if the second PDU transmitted in other HARQ processes contains SI and the first transmission time of the second PDU is earlier than the first transmission time of the first PDU, the user terminal discards the SI contained in the second PDU by indicating the base station node that the SI in the second PDU is invalid or terminating the retransmission of the second PDU. When the base station node successfully receives the third PDU containing the SI, the base station node judges whether the fourth PDU containing the SI on other HARQ processes is successfully received within a preset time period before, if so, the base station node judges whether the SI in the third PDU successfully received at present is the latest SI by comparing the transmission times of the third PDU and the fourth PDU, if not, the base station node judges the SI in the third PDU successfully received at present as invalid, and the base station node discards the SI which is indicated to be invalid or judged as invalid. The preset time length is the time length from the time when the user terminal sends the PDU to the time when the feedback information of the PDU is received from the base station node.

The principle of the present invention is briefly explained above, and the transmission method of SI in E-DCH according to the first embodiment of the present invention is explained in detail below.

As shown in fig. 9, in step 901, the ue records the first transmission time of the PDU on each HARQ process. Specifically, the user terminal records the first transmission time of the PDU in each HARQ process by storing the connection frame number and subframe number of the PDU in each HARQ process at the first transmission time. For example, when the user terminal is in the event specified in the SI triggering mechanism, reaches the period specified in the SI triggering mechanism, has the remaining bit number D of the MAC-e PDU transmitted through one TTI greater than or equal to 18, or needs to transmit the MAC-e PDU containing SI on a certain HARQ process for other reasons, the first transmission time of the MAC-e PDU is recorded by saving the connection frame number and subframe number of the MAC-e PDU on the HARQ process at the first transmission time.

Then, step 902 is performed, and when a first PDU including SI in any HARQ process of the ue is successfully received by a Radio Link Set (RLS) including a serving cell, the ue determines whether there is a second PDU including SI being transmitted in another HARQ process.

Specifically, the MAC-e PDU including the SI transmitted by the user terminal to the base station node on each HARQ process may include only the SI without including higher layer data, or may include both the SI and the higher layer data. For the MAC-e PDU only containing the SI and not containing the higher layer data, if the user terminal receives the acknowledgement information ACK from the RLS containing the service cell, the SI in the MAC-e PDU is successfully sent; for the MAC-e PDU containing the SI and the higher layer data, if the user terminal only receives the acknowledgement information ACK of any other RLS, the transmission of the higher layer data in the MAC-e PDU is successful, and the SI in the MAC-e PDU is lost, if the user terminal receives both the acknowledgement information ACK of other RLS and the acknowledgement information ACK of the RLS containing the service cell, the transmission of both the higher layer data and the SI in the MAC-e PDU is successful.

Therefore, when the first PDU containing SI on a certain HARQ process is successfully received by the RLS containing the serving cell, it indicates that the SI in the first PDU has been successfully transmitted. When the SI in the first PDU is successfully sent, the user terminal judges whether a second PDU containing the SI is transmitted on other HARQ processes. For example, for a 2ms TTI, there are 8 parallel HARQ processes in the ue, and when a first PDU containing SI on any HARQ process is successfully received by the RLS containing the serving cell, 7 parallel HARQ processes are checked one by one to determine whether there is a second PDU containing SI being transmitted on the 7 HARQ processes. If so, go to step 903, otherwise, go directly to step 907.

In step 903, the ue further determines whether the SI in the second PDU being transmitted is an updated SI report. Specifically, since the user terminal records the first transmission time of the PDU including the SI in each HARQ process, it can further determine whether the first transmission time of the second PDU being transmitted is earlier than the first transmission time of the first PDU according to the recorded first transmission time of the PDU in each HARQ process, if so, it indicates that the SI included in the second PDU is an old SI report, and step 904 is entered, otherwise, it indicates that the SI included in the second PDU is newer than the SI included in the first PDU, and step 907 is directly entered.

In step 904, as described above, the MAC-e PDU including the SI transmitted by the user terminal to the base station node on each HARQ process may include only the SI without including the higher layer data, or may include both the SI and the higher layer data. Therefore, in this step, the ue needs to determine whether the second PDU is a MAC-e PDU containing only SI and no higher layer data, or a MAC-e PDU containing both SI and higher layer data. If the second PDU contains only SI and no higher layer data, proceed to step 905; if the second PDU contains both SI and higher layer data, step 906 is entered.

In step 905, the user terminal terminates the retransmission of the second PDU when it contains only SI and no higher layer data. Because the SI contained in the second PDU is an old SI report and there is no higher layer data to be transmitted in the second PDU, the ue discards the SI contained in the PDU by terminating the retransmission of the second PDU, which not only ensures that the ue obtains the latest SI report from the ue, but also effectively saves system resources.

In step 906, when the second PDU contains both SI and higher layer data, the ue instructs the base station node that the SI in the transmitting second PDU is invalid to discard the SI contained in the PDU. The problem that a new SI report may be covered by an old SI report due to the retransmission of SI is avoided, so that the base station node can obtain the latest SI report from the user terminal in time, and the performance of E-DCH uplink packet scheduling is also ensured.

Specifically, the user terminal indicates to the base station node that the SI in the second PDU is invalid by setting control information corresponding to the PDU in the E-DPCCH.

For example, in the subsequent retransmission of the second PDU, the E-TFCI field in the corresponding TTI in the E-DPCCH is set to a specified value, indicating to the base station node that the SI in this PDU is invalid. Since the retransmission always uses the same transport format (transport block size) as the initial transmission in the E-DCH and the E-TFC field on the E-DPCCH in the retransmission is redundant, for the case where SI is transmitted together with higher layer data, a specific E-TFCI value, i.e. transport block index, may be assigned in the retransmission to indicate to the base station node that the SI contained in the second PDU is invalid, e.g. setting E-TFCI to 0 indicates that the SI in the PDU is invalid. Alternatively, in the retransmission of the second PDU, an E-TFCI value different from that of the initial transmission is arbitrarily designated to indicate that the SI contained in the PDU is invalid. The user terminal indicates that the SI in the PDU corresponding to the base station node is invalid by setting the control signaling information of the E-DPCCH in the prior art, so that the scheme of the invention is easier to realize.

Then, step 907 is entered, and when the base station node receives the PDU, it determines whether it is indicated that the SI in the PDU is invalid. For the above case, the base station node determines whether the SI contained in the received PDU is invalid according to the E-TFCI field value in the corresponding TTI in the E-DPCCH, and if so, directly proceeds to step 910, otherwise, proceeds to step 908.

In step 908, the base station node determines whether the SI included in the third PDU that is currently successfully received is up to date. Specifically, since the ue needs a certain time, i.e. RTT, from sending a MAC-e PDU on one HARQ process until receiving the feedback information of the MAC-e PDU from the base station node, the time length is exactly one retransmission time, i.e. 16ms for the 2ms TTI mode; for the 10ms TTI mode, 40 ms. Therefore, when the user terminal knows that the first PDU containing SI was successfully received by the RLS containing the serving cell, there may be other HARQ processes transmitting or retransmitting MAC-e PDUs containing SI within one RTT before this, and if a certain HARQ process also successfully transmits MAC-e PDUs containing SI, the problem may still be caused that new SI information is replaced by old SI information.

Therefore, in this step, when the base station node successfully receives the third PDU containing SI, it determines whether other fourth PDUs containing SI have been successfully received in other HARQ processes within one RTT before, if so, compares the transmission times of the third PDU and the fourth PDU, if the transmission times of the third PDU is greater than the transmission times of the fourth PDU, determines that the SI in the currently successfully received third PDU is not the latest SI report, and enters step 909, otherwise, the process is ended.

In step 909, the base station node determines that the SI in the third PDU that is currently successfully received is invalid. Since the SI contained in the third PDU is not the latest SI report, determining that the SI is invalid further ensures that the base station node obtains the latest SI report, and ensures the performance of E-DCH uplink packet scheduling.

Next, at step 910, the base station node discards the invalid SI. Specifically, when the base station node receives the PDU and is indicated that the SI in the PDU is invalid, or judges that the SI in the received PDU is invalid, the SI in the PDU is discarded to ensure that the latest SI report is obtained, thereby ensuring the performance of E-DCH uplink packet scheduling.

The transmission method of SI in EDCH of the second embodiment of the present invention is substantially the same as the first embodiment except that in the first embodiment, the ue indicates to the base station node that SI in the second PDU is invalid by setting the E-TFCI field in the corresponding TTI in E-DPCCH. In the embodiment, the user terminal sets the 'Happy' bit corresponding to the second PDU in the E-DPCCH control information to a value indicating that the SI is invalid when retransmitting the second PDU, wherein the 'Happy' bit in the E-DPCCH control information is redefined to indicate whether the SI is valid or not when retransmitting the second PDU. If it is defined that the SI is valid when the "Happy" bit value is 0 at retransmission and invalid when the "Happy" bit value is 1, the base station node may indicate that the SI in the second PDU is invalid by setting the "Happy" bit value to 1 in the corresponding TTI in the E-DPCCH.

As shown in fig. 10, a user terminal according to a third embodiment of the present invention includes: a HARQ entity, wherein the HARQ entity has at least two HARQ processes; and a judging module, configured to, when a first PDU including SI in any HARQ process of the HARQ entity is successfully received by the RLS including the serving cell, judge whether a second PDU being transmitted in another HARQ process includes SI, where a first transmission time of the second PDU is earlier than a first transmission time of the first PDU, and if so, discard the SI included in the second PDU. To ensure that the latest SI report is obtained, thereby ensuring the performance of E-DCH uplink packet scheduling.

It should be noted that, when determining that the first transmission time of the second PDU is earlier than the first transmission time of the first PDU, the determining module needs to further determine the content carried in the second PDU, and if the second PDU includes SI and high-level data at the same time, sets control information corresponding to the second PDU in the E-DPCCH to indicate that the SI in the second PDU is invalid; and if the SI contained in the second PDU does not contain higher layer data, the HARQ entity is instructed to terminate the retransmission of the second PDU so as to save system resources.

As shown in fig. 11, a base station node according to a fourth embodiment of the present invention includes: a HARQ entity, wherein the HARQ entity has at least two HARQ processes; and a judging module, configured to, when any HARQ process successfully receives a PDU including SI, judge whether control information on the E-DPCCH corresponding to the PDU indicates that SI in the PDU is invalid, and if so, indicate that SI in the PDU is not the latest SI report, and indicate that the HARQ entity discards SI in the PDU. The judging module is further configured to, when any HARQ process successfully receives a third PDU containing SI, judge whether a fourth PDU containing SI on another HARQ process has been successfully received within a predetermined time period before that, if yes, compare the transmission times of the third PDU and the fourth PDU, and if the transmission time of the third PDU is greater than the transmission time of the fourth PDU, indicate that the SI in the currently successfully received third PDU is not the latest SI report, and indicate that the HARQ entity discards the SI in the third PDU.

The predetermined time length is the time length from the time when the user terminal sends the PDU to the time when the user terminal receives the feedback information of the base station node to the PDU, namely, RTT.

It should be noted that, in the present invention, the first PDU, the second PDU, the third PDU, and the fourth PDU are not specific to one PDU, but description is made for one type of PDU for ease of understanding.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. A method for scheduling information transmission in an enhanced dedicated channel, comprising the steps of:

2. The method of claim 1, wherein the step of discarding the scheduling information contained in the second PDU by the user equipment further comprises the sub-steps of:

3. The method for scheduling information transmission in an enhanced dedicated channel according to claim 1, further comprising the steps of:

4. The method of claim 4, wherein the first transmission time is represented by a connection frame number and a subframe number.

5. The method of claim 2, wherein the user equipment indicates to the base station node that the scheduling information in the second PDU is invalid by setting control information corresponding to the second PDU in a dedicated physical control channel E-DPCCH of the enhanced dedicated channel.

6. The method of claim 5, wherein the user terminal indicates to the base station node that the scheduling information in the second PDU is invalid by one of:

7. The method for scheduling information transmission in an enhanced dedicated channel according to any of claims 1 to 6, further comprising the steps of:

8. The method for scheduling information transmission in an enhanced dedicated channel according to claim 7, further comprising the steps of:

9. A user terminal comprises a HARQ entity, wherein, the HARQ entity comprises at least two HARQ processes, and is characterized in that the user terminal also comprises a judging module which is used for judging whether a second PDU transmitted on other HARQ processes contains scheduling information when a first protocol data unit PDU containing scheduling information on any HARQ process of the HARQ entity is successfully received by a Radio Link Set (RLS) containing a service cell, and the first transmission time of the second PDU is earlier than that of the first PDU, if so, the scheduling information contained in the second PDU is abandoned.

10. The ue of claim 9, wherein when discarding the scheduling information contained in the second PDU, the determining module further determines the content carried in the second PDU, and if the second PDU contains both the scheduling information and higher layer data, sets control information corresponding to the second PDU in the E-DPCCH to indicate that the scheduling information in the second PDU is invalid; and if the second PDU contains the scheduling information and does not contain the high-level data, the HARQ entity is instructed to terminate the retransmission of the second PDU.

11. A base station node comprises an HARQ entity, wherein the HARQ entity comprises at least two HARQ processes, and is characterized by also comprising a judging module used for judging whether control information on an E-DPCCH corresponding to a PDU indicates that scheduling information in the PDU is invalid or not when any HARQ process successfully receives the PDU containing the scheduling information, and if so, discarding the scheduling information in the PDU.

12. The base station node of claim 11, wherein the determining module is further configured to determine whether a fourth PDU including the scheduling information in another HARQ process has been successfully received within a predetermined time period before any HARQ process successfully receives the third PDU including the scheduling information, if so, compare the transmission times of the third PDU and the fourth PDU, and if the transmission time of the third PDU is greater than the transmission times of the fourth PDU, instruct the HARQ entity to discard the scheduling information in the third PDU;