WO2008025232A1 - Procédé permettant la surveillance répétée d'une demande de répétition automatique hybride asynchrone d'une liaison montante améliorée - Google Patents

Procédé permettant la surveillance répétée d'une demande de répétition automatique hybride asynchrone d'une liaison montante améliorée Download PDF

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Publication number
WO2008025232A1
WO2008025232A1 PCT/CN2007/002462 CN2007002462W WO2008025232A1 WO 2008025232 A1 WO2008025232 A1 WO 2008025232A1 CN 2007002462 W CN2007002462 W CN 2007002462W WO 2008025232 A1 WO2008025232 A1 WO 2008025232A1
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WIPO (PCT)
Prior art keywords
retransmission
user terminal
access control
enhanced
hybrid automatic
Prior art date
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PCT/CN2007/002462
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English (en)
French (fr)
Inventor
Hui Chen
Yincheng Zhang
Zhifeng Ma
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Zte Corporation
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Publication date
Application filed by Zte Corporation filed Critical Zte Corporation
Priority to EP07785358.8A priority Critical patent/EP2061175B1/en
Priority to US12/377,929 priority patent/US8121048B2/en
Priority to JP2009524875A priority patent/JP2010502053A/ja
Priority to CN2007800288318A priority patent/CN101502033B/zh
Publication of WO2008025232A1 publication Critical patent/WO2008025232A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/188—Time-out mechanisms
    • H04L1/1883—Time-out mechanisms using multiple timers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1848—Time-out mechanisms

Definitions

  • the invention relates to a retransmission control method for asynchronous hybrid automatic repeat request in a time division synchronous code division multiple access system, in particular to an enhanced uplink asynchronous HARQ (hybrid automatic repeat request) in a time division synchronous code division multiple access system.
  • Retransmission control method Background technique
  • 3GPP 3rd Generation Mobile Partner Project
  • TD-SCDMA Time Division Synchronous Code Division Multiple Access
  • HSUPA High Speed Uplink Packet Access
  • 3GPP's TD-SCDMA has not yet formed a complete technical report, but the basic technical framework has already appeared. It is basically consistent with the TD-CDMA (Time Division Code Division Multiple Access) system. You can refer to the proposal and conference report of the 3GPP May Shanghai Conference. The technical framework related to the present invention is as described below.
  • E-DCH Enhanced Uplink Dedicated Transport Channel
  • TTI transmission time interval
  • the new physical channels are:
  • An E-AGCH channel (uplink enhanced absolute grant channel), which is a control channel for NodeB (Node B) transmission grant information;
  • An E-PUCH channel (uplink enhanced physical channel) is a traffic channel used by a UE (User Equipment) to carry an E-DCH type coded combined transmission channel, and information related to the auxiliary scheduling is also transmitted on the channel;
  • the E-RUCCH channel (uplink enhanced random access control channel) is a physical layer control channel, and is used for the UE to transmit information related to the auxiliary scheduling without authorization, and the E-RUCCH uses the random access physical channel resource;
  • the E-fflCH channel (uplink enhanced hybrid automatic repeat request indication channel) is a control channel used by the NodeB to transmit HARQ indication information.
  • the HSUPA service is divided into scheduling service and non-scheduling service according to different scheduling modes.
  • the resources of the non-scheduled service are allocated by the SRNC (Serving Radio Network Controller) for the UE, and the allocation mode is the same as the existing dedicated channel allocation mode;
  • the NodeB sends absolute authorization information to the UE through the E-AGCH channel, including power grant information and physical channel allocation information.
  • the authorization information is not sent to the UE in each TTI (transmission time interval), and the scheduling function entity of the NodeB determines whether to send and when to send according to the network condition and the QoS (Quality of Service) parameter of the UE.
  • the UE listens to a group of E-AGCH channels, reads the authorization information once it is successfully decoded, and transmits the data through the authorized E-PUCH channel (enhanced uplink physical channel) after the time specified by the protocol.
  • the entity handling the HARQ function is located in the MAC-es/e entity (Enhanced Medium Access Control Sub-Entity/Enhanced Medium Access Control Entity) of the UE side and the MAC-e (Enhanced Medium Access Control Entity Entity) entity in the NodeB, one
  • the HARQ entity supports multiple instances of the HARQ protocol, such as one HARQ process. Each instance has not yet determined the number of parallel processes in a HARQ entity, but not less than 4 processes, one HARQ process and one physical layer buffer.
  • the area is associated with the buffer, which is used at the transmitting end to buffer data for retransmission; at the receiving end, for soft combining and decoding.
  • the HARQ entity on the UE side is responsible for the storage and retransmission of the MAC-e PDU (Protocol Data Unit); the HARQ entity on the NodeB side is responsible for generating an ACK (Acknowledgement) or NACK (No Acknowledgement) indication for a single MAC-e PDU, and at E- The indication is sent to the UE on the fflCH channel.
  • a group of logical channels belonging to one UE having the same QoS attribute are mapped to the same MAC-d (dedicated medium access control) flow, and one UE supports up to 16 logical channels, 8 MAC-d flows, the upper layer allows multiple MAC-d flows to be multiplexed in one MAC-e PDU, which configures a MAC-d flow multiplexing list for each MAC-d flow, and multiplexes the MAC-d flow in the list
  • the QoS is similar to the MAC-d flow.
  • HARQ Profile service attribute
  • the number (which can also be "maximum number of transmissions", at this time "maximum number of retransmissions, "maximum number of transmissions” minus 1) and power offset.
  • the maximum number of retransmissions in the HARQ Profile of a MAC-e PDU is generated according to the following rules:
  • the maximum number of retransmissions is the maximum number of maximum retransmissions of all MAC-d streams multiplexed into the MAC-e PDU;
  • the maximum number of retransmissions reflects the delay requirements and residual bit rate requirements of the MAC-e PDU.
  • the HARQ entity provides the HARQ process MAC-e PDU and its HARQ profile, where the maximum number of retransmissions is used by the HARQ process to retransmit the retransmission when the PDU retransmission exceeds the maximum number of retransmissions.
  • E-TFC Enhanced Transport Format Set
  • TSN Send Sequence Number setting entity according to E- The TFC selects the result of the entity selection, and is responsible for placing multiple MAC-d PDUs from one logical channel into the MAC-es (Enhanced Medium Access Control Sub-entity) PDU, and multiplexing one or more MAC-es PDUs into A MAC-e PDU is generated and a HARQ profile is generated
  • the scheduling access entity is responsible for obtaining and normalizing scheduling-related signaling information
  • the HARQ entity is responsible for HARQ protocol-related processing, including storage and retransmission of MAC-e PDUs.
  • the data transmission process is as shown in Figure 2.
  • priority is given to retransmission, selecting the appropriate retransmission packet, informing the corresponding HARQ process to retransmit, and retransmitting the HARQ process: providing the retransmission sequence number for the physical layer.
  • the information such as the power offset is retransmitted, and the retransmission counter is automatically incremented by one; if the maximum number of retransmissions of the MAC-e PDU is exceeded, the packet is discarded, the HARQ process is cleared, and the packet is not retransmitted in the future. .
  • the E-TFC selection entity is notified to select a transmission format; the multiplexing and TSN setting entity assembles the MAC-e PDU, and generates a HARQ profile;
  • HARQ The entity selects an idle process for new data transmission, and the processing of the HARQ process: provides the physical layer with information such as a transport format, a retransmission sequence number, a process number, and a power offset, and the retransmission counter is cleared to 0.
  • the NodeB creates a MAC-e entity for each UE that uses the enhanced uplink, and has a scheduler that is responsible for scheduling control of the UE, generating ACK and NACK indications for a single MAC-e PDU, and decoding the MAC-e PDU.
  • SRNC monthly wireless network In the network controller, a MAC-es entity is created for each UE using the enhanced uplink, which is responsible for reordering and demultiplexing the MAC-es PDUs, wherein the reordering is similar to the reordering mechanism in the existing HSDPA.
  • TD-SCDMA enhances the scheduling service in the uplink, and adopts the HARQ mechanism of synchronous acknowledgment and asynchronous retransmission.
  • the timing relationship is as shown in Figure 3: After the UE receives the E-AGCH authorization information, After the timing time T1, the data is transmitted on the E-PUCH channel, and after receiving the data, the HARQ indication that the NodeB uploads on the E-HICH channel is received after the timing time T2. If the NACK is received, the UE will wait for the absolute authorization to arrive. The data is retransmitted, and the waiting time is T3. If the ACK is received, the UE will discard the data block, clear the relevant HARQ process, and wait for the next authorization to perform new data transmission. Tl and ⁇ 2 have a clear timing relationship, and ⁇ 3 is variable, depending on the scheduling of the NodeB.
  • the HARQ asynchronous retransmission mechanism is adopted, so that the retransmission time of the MAC-e PDU is not guaranteed, and the setting of the number of retransmissions alone cannot ensure the delay requirement in the QoS in the radio bearer, and the upper layer RLC (radio link)
  • the control layer does not allow the MAC layer of the UE to wait for retransmission of resources indefinitely under the transmission mechanism using the acknowledge mode.
  • a timer mechanism and a window mechanism are often used.
  • the timer mechanism is used to avoid setting the low sequence number packet for a long time under non-sequential transmission; the window mechanism is to avoid the confusion of the sequence number, because the sequence number space of the packet is limited, in a system with a retransmission mechanism,
  • the serial numbers of the old and new groups will be repeated, which will easily cause the serial number of the receiving end to be confused.
  • the 3GPP organization has made clear that this part is not standardized, and belongs to the internal processing mechanism of SR C.
  • this mechanism requires cooperation from the UE side, so as to avoid unnecessary retransmission. For example, if there is no UE side cooperation, the network side reordering timer has timed out, but the UE side does not exceed the maximum number of retransmissions. Therefore, the retransmission data sent by the UE side will not be processed on the network side. , causing unnecessary retransmissions. Summary of the invention
  • the present invention provides a retransmission control method for enhancing an uplink asynchronous hybrid automatic repeat request, and implements HARQ retransmission control to ensure that the MAC layer retransmission delay and the retransmission status of both ends are consistent.
  • the method for retransmitting the uplink asynchronous hybrid automatic repeat request of the present invention includes:
  • the network side adds a retransmission timer parameter to the hybrid automatic repeat request attribute of each dedicated medium access control entity flow of the user terminal, and the user terminal is multiplexed into each of the enhanced medium access control entity protocol data units.
  • the retransmission timer parameter of the dedicated media access control entity stream, and the retransmission timer value of the enhanced media access control entity protocol data unit is set;
  • the user terminal performs retransmission control by using the retransmission timer value and the maximum number of retransmissions of the enhanced medium access control entity protocol data unit.
  • step (1) is specifically:
  • the retransmission timer parameter is added in the hybrid automatic repeat request service attribute of each dedicated media access control entity flow;
  • the user terminal when the user terminal sets the hybrid automatic repeat request service attribute of the enhanced medium access control entity protocol data unit, the user terminal multiplexes the dedicated medium access control entity stream multiplexed into the enhanced medium access control entity protocol data unit.
  • the largest one of the retransmission timer parameters is the retransmission timer value of the enhanced medium access control entity protocol data unit.
  • step (2) is specifically:
  • the user terminal receives the indication information on the corresponding uplink enhanced hybrid automatic repeat request indication channel. If the indication information is non-confirmation information, if the data is not confirmed after the first transmission, the information is started.
  • the retransmission timer of the enhanced media access control entity protocol data unit performs step (23); if the indication information is a confirmation indication, the process ends;
  • the user terminal determines whether the current number of retransmissions is less than the maximum number of retransmissions of the packet, and if yes, performing step (24), if the current number of retransmissions is equal to or greater than the maximum number of retransmissions of the packet, the process ends;
  • the enhanced media access control entity protocol data unit allows the user terminal to resend the data before the retransmission timer has not timed out; after the retransmission timer expires, the user terminal discards the data.
  • step (24) is specifically:
  • step (22) further includes:
  • the device When the user terminal resends the data and receives the unconfirmed indication information again, if the current number of retransmissions does not reach the maximum number of retransmissions, the device continues to wait for retransmission of resources and maintains the original retransmission timer.
  • the network side configures the enhanced uplink radio bearer for the user terminal, in the step of adding the retransmission timer parameter in the hybrid automatic repeat request service attribute of each dedicated medium access control entity flow, when configuring the retransmission timer parameter
  • the configured retransmission timer parameter matches the timer of the reordering queue on the network side.
  • the step of adding the retransmission timer parameter in the hybrid automatic repeat request service attribute of each dedicated medium access control entity stream is in the high speed uplink packet access system.
  • the configured retransmission timer parameters match the send window parameters configured for the user device.
  • step (12) further includes:
  • the maximum retransmission of each dedicated medium access control entity stream multiplexed to the enhanced medium access control entity protocol data unit is taken. The largest value of the number of times as the maximum number of retransmissions of the Enhanced Media Access Control Entity Protocol data unit.
  • step (11) further includes:
  • the group access control entity flow MAC with the QoS attributes of the service quality is similar.
  • the d stream is multiplexed.
  • the network side adds a retransmission in the attribute of each dedicated medium access control entity flow (MAC-d flow) of the user terminal.
  • the timer parameter the user terminal sets a retransmission timer of the enhanced medium access control entity protocol data unit (MAC-e PDU) according to the retransmission timer parameter of each dedicated medium access control entity flow, and enhances the medium access control
  • the retransmission timer of the protocol data unit cooperates with the maximum number of retransmissions to perform retransmission control, realizing the retransmission delay requirement in the radio bearer QoS, and also realizes that the network side and the user terminal work together to avoid unnecessary use of the user terminal. Retransmission.
  • the invention is applicable to both TD-CDMA systems and TD-SCDMA systems.
  • FIG. 1 is a structural diagram of a MAC-es/e entity on a UE side of a user equipment
  • 3 is a HARQ timing diagram in a synchronous acknowledgement and asynchronous retransmission mode
  • FIG. 4 is a flow chart of HARQ data transmission after a new retransmission timer of the retransmission control method for enhancing an uplink asynchronous hybrid automatic repeat request according to the present invention.
  • the retransmission control method for the enhanced uplink asynchronous hybrid automatic repeat request of the present invention ensures asynchronous HARQ by adding configuration parameters of the retransmission timer to each MAC-d flow of the user equipment UE, together with the maximum number of retransmissions.
  • the delay requirement and residual bit rate requirement of the radio bearer under the retransmission mechanism takes the HSUPA technology in the TD-SCDMA system as an example.
  • Step 1 When the network side configures the radio bearer of the E-DCH type for the UE, combined with the configuration of the number of retransmissions, comprehensively considers the delay requirement and the residual bit rate requirement of the MAC-d flow; and considers the timer of the network side reordering queue
  • a new configuration parameter is added to the HARQ profile of each MAC-d flow:
  • the retransmission timer T_Retrans is used to control the maximum retransmission time of each MAC-d flow.
  • the QoS attributes of the logical channels mapped in one MAC-d flow in HSUPA are the same, and thus the present invention sets the retransmission timer in units of MAC-d flows.
  • the upper layer When the upper layer is configured with "T-Retrans", it should match the timer of the reordering queue on the network side to avoid inconsistency between the two ends. If the window mechanism is also used in the HSUPA system, the upper layer should configure the transmit window parameters for the UE, which should match the "T-Retrans" parameter to achieve high transmit end. Work effectively.
  • Table 1 is a partial configuration parameter information element of the MAC-d flow.
  • a new "T-Retmns" element is added, which is used when the UE is in the authorized E-PUCH.
  • the timer is started, and the packet is discarded after the timeout.
  • MP indicates that the element is mandatory; OP indicates that the element is optional.
  • Step 2 When the UE sets the HARQ profile of the MAC-e PDU, the retransmission timer is the largest one of the retransmission timers of the MAC-d streams multiplexed in the MAC-e PDU.
  • the UE After receiving the authorization of the NodeB, the UE first considers the data in the logical channel with the highest priority according to the principle of logical channel priority, and then considers the multiplexing list of the MAC-d flow where the logical channel is located, so that the finally obtained MAC-e
  • the PDU may contain data of multiple MAC-d flows, and the maximum number of retransmissions of the MAC-e PDU will select the largest one from the HARQ profiles of the multiplexed MAC-d flows, and the retransmission timer will also select the largest. a value.
  • the upper layer When configuring the multiplex list of MAC-d flows, the upper layer should consider multiplexing a set of MAC-d flows with similar QoS attributes.
  • Step 3 After the UE sends new data, if the NACK is received on the corresponding E-HICH, the retransmission timer of the MAC-e PDU is started, and the number of retransmissions does not reach the maximum number of retransmissions and is re-issued. The retransmission is allowed before the timer expires; after the maximum number of retransmissions is reached or the retransmission timer expires, the packet is discarded.
  • the NACK is received after the UE sends new data, it means that the PDU needs to be retransmitted.
  • the device When the NACK is received again after retransmission, if the current number of retransmissions does not reach the maximum number of retransmissions, the device continues to wait for retransmission of resources and maintains the original retransmission timer.
  • the UE In the process of processing the enhanced uplink service, if the UE receives the radio bearer reconfiguration command from the upper layer, and the reconfiguration command includes the "T_Retrans" element, the UE enables the new configuration parameter after the activation time specified in the message. When the activation time comes, the running retransmission timer is not changed, and the new configuration information is used when the retransmission timer is started later.
  • Figure 4 is a flow chart showing the complete operation of a HARQ process after adding the method of the present invention. A specific embodiment of the present invention will be described below with reference to Figure 4:
  • the HARQ process receives a new MAC-e PDU and its HARQ service attribute from the HARQ entity, where the maximum number of retransmissions, the power offset, and the retransmission timer of the MAC-e PDU are included, where the retransmission timer is a complex The maximum value of the retransmission timer of each MAC-d flow in the MAC-e PDU;
  • the HARQ process requires the physical layer to send new data and provide the necessary physical layer parameters while initializing its own internal variables: retransmission timer T-Retrans and retransmission counter N-Retrans. T-Retrans is in reset state; N-Retrans is cleared.
  • the UE receives the HARQ indication from the NodeB on the E-HICH channel;
  • step (404) determining whether the HARQ indication is ACK, if the HARQ indication is ACK, performing step (405); if the HARQ indication is NACK, performing step (406)
  • step (406) determining whether the current number of retransmissions is less than the maximum number of retransmissions of the packet, if yes, performing step (407); if the current number of retransmissions is equal to or greater than the maximum number of retransmissions of the packet, performing step (405)
  • the packet is waiting for retransmission, and it is determined whether the NACK indication information is received for the first time. If the NACK indication information is received for the first time, the step (408) is performed; if the NACK indication information is not received for the first time, the step is performed. ( 409 ) ;
  • step (411) determining whether the retransmission timer has timed out. If it times out, it will not resend, and returns to step (405); if there is no timeout, step (411) is performed;
  • the network side adds a retransmission timer parameter to the dedicated media access control entity flow of the user terminal, and the user terminal controls according to each dedicated medium.
  • the timer parameter of the entity flow is used to set a retransmission timer of the enhanced medium access control entity protocol data unit, and cooperates with the maximum number of retransmissions to perform retransmission control, thereby realizing the retransmission delay requirement in the QoS of the radio bearer.
  • the network side and the user terminal work together to avoid unnecessary retransmission of the user terminal.
  • the window mechanism is also used in the HSUPA system, then the retransmission timer is used together with the window mechanism to implement efficient packet transmission under the HARQ asynchronous retransmission mechanism to ensure consistent state at both ends.
  • the invention is applicable to both TD-CDMA systems and TD-SCDMA systems.
  • the invention is applicable to a time division synchronous code division multiple access TD-SCDMA system, and is also applicable to a time division code division multiple access system TD-CDMA system.
  • the method for retransmission control is to add a retransmission timer parameter to the dedicated media access control entity stream of the user terminal by the network side, and the user terminal sets the timer parameter according to each dedicated medium access control entity flow.
  • the retransmission timer of the media access control entity protocol data unit is enhanced, and the retransmission control is performed in conjunction with the maximum number of retransmissions, thereby realizing the retransmission delay requirement in the QoS of the radio bearer, and also implementing the network side and the user terminal. Working together, avoiding unnecessary retransmission of user terminals.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Communication Control (AREA)

Description

增强上行链路异^混合自动重传请求的重传控制方法
技术领域
本发明涉及一种时分同步码分多址系统中异步混合自动重传请求的重 传控制方法， 尤其涉及一种时分同步码分多址系统中增强上行链路异步 HARQ (混合自动重传请求)重传控制的方法。 背景技术
2006 年 3 月， 3GPP (第三代移动通讯伙伴项目 ） 通过了低码片 TD-SCDMA (时分同步码分多址） 系统增强上行链路的立项申请。 增强上 行链路一般被称为 HSUPA ( High Speed Uplink Packet Access, 高速上行分组 接入） ， 旨在通过先进的技术提高上行链路的效率， 以有效的支持像 web 浏览、 视频、 多媒体信息和其他基于 IP的业务。
目前 3GPP的 TD-SCDMA尚未形成完整的技术报告， 但基本的技术框 架已经显现， 与 TD-CDMA (时分码分多址 ) 系统基本保持一致， 可以参考 3GPP 5月上海会议的提案和会议报告， 与本发明相关的技术框架如下面描 述。
HSUPA中新增了一个传输信道 E-DCH (增强上行链路专用传输信道） , 增强上行数据承载在该传输信道上， E-DCH的 TTI (传输时间间隔）为 5ms。
新增的物理信道有：
E-AGCH信道（上行增强绝对授权信道） ， 是控制信道， 用于 NodeB (节点 B )传输授权信息；
E-PUCH信道 （上行增强物理信道） ， 是业务信道， 用于 UE ( User Equipment, 用户终端）承载 E-DCH类型的编码组合传输信道， 辅助调度相 关的信息也在该信道上传输；
E-RUCCH信道（上行增强随机接入控制信道） ， 是物理层控制信道， 用于 UE在无授权的情况下， 传输辅助调度相关的信息， E-RUCCH使用随 机接入物理信道资源； E-fflCH信道（上行增强混合自动重传请求指示信道） ， 是控制信道， 用于 NodeB传输 HARQ指示信息。
HSUPA业务按调度方式的不同分为调度业务和非调度业务， 其中非调 度业务的资源由 SRNC (服务无线网絡控制器） 为 UE分配， 分配方式同现 有的专用信道分配方式； 调度业务是基于 NodeB 的调度， NodeB 通过 E-AGCH信道向 UE发送绝对授权信息， 其中包括功率授权信息和物理信道 分配信息。 但授权信息并不在每个 TTI (传输时间间隔） 中向 UE发送， 完 全由 NodeB的调度功能实体根据网络情况和 UE的 QoS ( Quality of Service, 服务质量）参数来决定是否发送以及何时发送。 UE对一组 E-AGCH信道进 行侦听， 一旦解码成功就读取其中的授权信息， 并在协议规定的时间后通过 授权的 E-PUCH信道（增强上行物理信道）发送数据。
增强上行链路使用的另外一个关键技术是并行停等 HARQ技术， 实现 错误数据包的快速重传。 处理 HARQ功能的实体位于 UE侧的 MAC-es/e实 体（增强媒体接入控制子实体 /增强媒体接入控制实体）和 NodeB中的 MAC-e (增强媒体接入控制实体） 实体中， 一个 HARQ实体支持多个停等 HARQ 协议实例， 每个实例称为一个 HARQ进程， 目前尚未确定一个 HARQ实体 中并行的进程数， 但不会低于 4个进程， 一个 HARQ进程与一个物理层緩 冲区相关联， 该緩冲区在发送端用于緩存数据， 便于重发； 在接收端， 用于 软组合和解码。 UE侧的 HARQ实体负责 MAC-e PDU (协议数据单元） 的 存储和重发； NodeB侧的 HARQ实体负责对单个 MAC-e PDU产生 ACK(确 认）或 NACK (不确认）指示， 并在 E-fflCH信道上将指示发送给 UE。
在 TD-SCDMA上行增强技术中， 对属于一个 UE的、 具有相同 QoS属 性的一组逻辑信道映射到同一个 MAC-d (专用媒体接入控制） 流上， 一个 UE最多支持 16条逻辑信道、 8个 MAC-d流， 高层允许在一个 MAC-e PDU 中复用多个 MAC-d流， 它对各 MAC-d流配置 MAC-d流复用列表， 复用列 表中的 MAC-d流的 QoS与该 MAC-d流相近。 对 MAC-e PDU进行组装时， 按照逻辑信道优先级进行数据复用，同时需要考虑高层配置的最高优先级逻 辑信道所在 MAC-d流的复用列表。 高层为每个 MAC-d流设置一个 HARQ Profile (服务属性） ， 体现各 MAC-d流的 QoS属性， 其中包括最大重传次 数（也可以是 "最大发送次数" ， 此时 "最大重传次数，， 为 "最大发送次数" 减 1 )和功率偏移。
一个 MAC-e PDU的 HARQ Profile中的最大重传次数按照以下规则产 生：
最大重传次数是复用到该 MAC-e PDU中的所有 MAC-d流的最大重传 次数的最大值；
最大重传次数体现了 MAC-e PDU的时延要求和残留比特率要求。 在一 个新的传输开始时， HARQ 实体提供给 HARQ进程 MAC-e PDU和它的 HARQ profile, 其中最大重传次数用于 HARQ进程在该 PDU重传超过最大 重传次数时放弃重传。
图 1是 UE侧的 MAC-es/e实体， 其中 E-TFC (增强传输格式集合）选 择实体根据授权信息为新数据选择传输块长度； 复用和 TSN (发送序列号） 设置实体根据 E-TFC选择实体的选择结果， 负责将来自一个逻辑信道的多 个 MAC-d PDU放入 MAC-es (增强媒体接入控制子实体） PDU中， 并将一 个或多个 MAC-es PDU复用到一个 MAC-e PDU中， 并产生 HARQ Profile; 调度接入实体负责获得和规整与调度相关的信令信息； HARQ 实体负责 HARQ协议相关的处理， 包括对 MAC-e PDU的存储和重发。
数据发送流程如图 2所示， 接收到授权后， 优先考虑重传， 选择合适的 重传分组， 通知相应的 HARQ进程进行重传， HARQ进程的重传处理： 为 物理层提供重传序列号和功率偏移等信息， 进行重传， 对重传计数器自动加 1; 如果超过该 MAC-e PDU的最大重传次数则丢弃该分组， 清空该 HARQ 进程， 以后不再对该分组进行重传。 如果接收到授权后， 没有重传分组或该 授权资源不适合当前的重传分组， 通知 E-TFC选择实体选择传输格式； 复 用和 TSN设置实体组装 MAC-e PDU, 并产生 HARQ profile; HARQ实体选 择空闲的进程进行新数据传输， HARQ 进程的处理： 为物理层提供传输格 式、 重传序列号、 进程号和功率偏移等信息， 重传计数器清 0。
NodeB为每一个使用增强上行链路的 UE创建一个 MAC-e实体， 并有 一个调度器， 负责对 UE进行调度控制、 对单个 MAC-e PDU产生 ACK和 NACK指示、 对 MAC-e PDU解复用为 MAC-es PDU; SRNC (月艮务无线网 络控制器） 中为每一个使用增强上行链路的 UE创建一个 MAC-es实体， 负 责对 MAC-es PDU进行重排序和解复用，其中重排序和现有的 HSDPA中的 重排序机制相似。
TD-SCDMA增强上行链路中的调度业务， 采用的是同步确认、 异步重 传的 HARQ机制， 以调度业务为例， 其定时关系如附图 3 所示： UE收到 E-AGCH授权信息后， 在定时时间 T1后在 E-PUCH信道发送数据， 发送数 据后在定时时间 T2后收到 NodeB在 E-HICH信道上传来的 HARQ指示，如 果收到的是 NACK， UE将等待绝对授权到来后再重传数据，等待时间是 T3; 如果收到的是 ACK, UE将丢弃此数据块， 清空相关的 HARQ进程， 等待 下一次授权再进行新数据的传输。 其中 Tl、 Τ2有明确的定时关系， Τ3是可 变的， 取决于 NodeB的调度。
目前采用 HARQ异步重传机制，使得 MAC-e PDU的重传时间得不到保 证， 仅仅依赖重传次数的设置无法确保满足无线承载中 QoS中的时延要求， 且在上层 RLC (无线链路控制）层使用确认模式的传输机制下， 也不允许 UE的 MAC层无限期的等待重传资源。
另外网络侧 MAC-es实体进行重排序时，为了避免重排序緩沖区阻塞和 序号混淆， 往往采用定时器机制和窗口机制。 定时器机制用于在非顺序传输 下， 为了避免过长时间等待低序号分组而设置； 窗口机制是为了避免序号的 混淆， 因为分组的序号空间是有限的， 在有重传机制的系统中， 新老分组的 序号会重复， 容易造成接收端的序号混淆。 目前 3GPP组织已明确这部分不 作标准化， 属于 SR C内部处理机制， 但这一机制需要 UE侧的配合， 目的 是不作无谓的重传。 比如， 若没有 UE侧的配合， 就会出现网络侧重排序定 时器已经超时， 但 UE侧没有超过最大重传次数的情况， 这样 UE侧发出的 重传数据， 在网絡侧将得不到任何处理， 造成无谓的重传。 发明内容
为克服上述缺陷 ,本发明提供一种增强上行链路异步混合自动重传请求 的重传控制方法， 实现对 HARQ重传控制， 以便确保 MAC层重传时延和收 发两端重传状态一致。 为达到上述发明目的，本发明增强上行链路异步混合自动重传请求的重 传控制方法包括：
( 1 ) 网络侧在用户终端的各专用媒体接入控制实体流的混合自动重传 请求属性中增加重发定时器参数，用户终端依据复用到增强媒体接入控制实 体协议数据单元中的各专用媒体接入控制实体流的重发定时器参数，设置增 强媒体接入控制实体协议数据单元的重发定时器值；
( 2 )用户终端利用增强媒体接入控制实体协议数据单元的重发定时器 值和最大重发次数进行重传控制。
进一步地， 所述步驟（ 1 )具体为：
( 11 )网络侧为用户终端配置增强上行链路无线承载时，在各专用媒体 接入控制实体流的混合自动重传请求服务属性中增加重发定时器参数；
( 12 )用户终端在设置增强媒体接入控制实体协议数据单元的混合自动 重传请求服务属性时，取复用到该增强媒体接入控制实体协议数据单元的各 专用媒体接入控制实体流的重发定时器参数中最大的一个值，作为该增强媒 体接入控制实体协议数据单元的重发定时器值。
进一步地， 所述步骤（2 )具体为：
( 21 )用户终端发出新数据；
( 22 )用户终端在相应的上行增强混合自动重传请求指示信道上接收到 指示信息， 如果该指示信息为不确认信息， 若是所述数据第一次发送后收到 的不确认信息， 则启动该增强媒体接入控制实体协议数据单元的重发定时 器， 执行步骤（23 ) ； 如果该指示信息为确认指示， 则流程结束；
( 23 )用户终端判断当前重传次数是否小于该分組的最大重传次数， 如 果是， 执行步骤（24 ) , 如果当前重传次数等于或大于该分组的最大重传次 数， 则流程结束；
( 24 )增强媒体接入控制实体协议数据单元在重发定时器未超时前， 用 户终端允许重发该数据； 重发定时器超时后， 用户终端丢弃该数据。
进一步地， 所述步驟（24 )具体为：
( 241 ) 用户终端获得重传资源后， 如果重发定时器未超时， 用户终端 重新发送该数据， 并将重发次数加 1 , 返回执行步骤（22 ) ; 如果重发定时 器超时， 则用户终端丢弃该数据， 流程结束。
进一步地， 所述步骤（22 ) 中进一步包括：
当用户终端重新发送该数据后再次接收到不确认的指示信息，则在当前 重传次数未达到最大重传次数的情况下， 继续等待重发资源， 维持原有的重 发定时器。
进一步地， 所述步驟（11 ) 中：
网絡侧为用户终端配置增强上行链路无线承载时，在各专用媒体接入控 制实体流的混合自动重传请求服务属性中增加重发定时器参数的步骤中，在 配置重发定时器参数时，所配置的重发定时器参数与网络侧的重排序队列的 定时器相匹配。
进一步地， 所述步驟（11 ) 中：
网络侧为用户终端配置增强上行链路无线承载时，在各专用媒体接入控 制实体流的混合自动重传请求服务属性中增加重发定时器参数的步驟中，如 果高速上行分组接入系统中使用了窗口机制，则所配置的重发定时器参数与 为用户设备配置的发送窗口参数相匹配。
进一步地， 所述步骤（12 ) 中进一步还包括：
用户终端在设置增强媒体接入控制实体协议数据单元的混合自动重传 请求服务属性时，取复用到该增强媒体接入控制实体协议数据单元的各专用 媒体接入控制实体流的最大重传次数中最大的一个值，作为该增强媒体接入 控制实体协议数据单元的最大重传次数。
进一步地， 所述步骤（11 ) 中进一步包括：
所述网络侧的高层为用户终端配置增强上行链路无线承载时，在配置媒 体接入控制实体流的复用列表时， 是将服务质量 QoS属性相近的一组体接 入控制实体流 MAC-d流进行复用的。
本发明增强上行链路异步混合自动重传请求的重传控制方法中，网络侧 在用户终端的各专用媒体接入控制实体流（MAC-d 流） 的属性中新增重发 定时器参数，用户终端依据各专用媒体接入控制实体流的重发定时器参数设 置增强媒体接入控制实体协议数据单元（MAC-e PDU ) 的重发定时器， 并 通过增强媒体接入控制协议数据单元的重发定时器与最大重传次数相配合 进行重传控制， 实现了无线承载 QoS 中的重传时延要求， 也实现了网络侧 和用户终端协同工作， 避免了用户终端无谓的重传。 本发明同时适用于 TD-CDMA系统和 TD-SCDMA系统。
附图概述
图 1是用户设备 UE侧的 MAC-es/e实体结构图；
图 2是现有技术方案中数据发送的流程图；
图 3是同步确认、 异步重传方式下的 HARQ时序图；
图 4是本发明增强上行链路异步混合自动重传请求的重传控制方法新 增重发定时器之后的 HARQ数据发送流程图。 本发明的较佳实施方式
本发明的增强上行链路异步混合自动重传请求的重传控制方法，通过为 用户设备 UE的各 MAC-d流增加重发定时器的配置参数， 与最大重传次数 一起， 来确保异步 HARQ重传机制下无线承载的时延要求、 残留比特率要 求。 下面以 TD-SCDMA系统中的 HSUPA技术为例进行介绍。
步驟一、 网络侧为 UE配置 E-DCH类型的无线承载时， 结合重传次数 的配置， 综合考虑该 MAC-d流的时延要求和残留比特率要求； 同时考虑网 络侧重排序队列的定时器设置情况， 在各 MAC-d流的 HARQ Profile中新增 配置参数： 重发定时器 T— Retrans, 用于控制各 MAC-d流的最大重发时间。
HSUPA中一个 MAC-d流中映射的逻辑信道的 QoS属性是相同的， 因 而本发明以 MAC-d流为单位设置重发定时器。
高层在配置 "T— Retrans"时，应与网络侧的重排序队列的定时器相匹配， 避免收发两端工作的不一致。 如果窗口机制也被用于 HSUPA系统， 高层为 UE配置发送窗口参数时， 应与 "T— Retrans" 参数相匹配， 实现发送端的高 效工作。
表 1是 MAC-d流的部分配置参数信息元素， 除了原有的功率偏移、 最 大重传次数外， 新增 "T—Retmns" 元素， 其使用方法是， 当 UE在授权的 E-PUCH上发出新数据后， 在之后的 E-HICH上如果收到 NACK指示， 则启 动该定时器， 超时后丢弃该分组。 表中 "存在，， 一栏中， MP表示该元素是 必选的； OP表示该元素是可选的。
Figure imgf000010_0001
Figure imgf000010_0002
步骤二、 UE在设置 MAC-e PDU的 HARQ Profile时， 其重发定时器是 MAC-e PDU中复用的各 MAC-d流的重发定时器中最大的一个值。
UE接收到 NodeB的授权后， 根据逻辑信道优先级原则， 首先考虑优先 级最高的逻辑信道中的数据， 然后考虑该逻辑信道所在 MAC-d流的复用列 表， 这样， 最终得到的 MAC-e PDU中可能包含多个 MAC-d流的数据， 该 MAC-e PDU的最大重传次数将从这些复用的 MAC-d流的 HARQ Profile中 选择最大的一个， 重发定时器也将选择最大的一个值。 高层在配置 MAC-d 流的复用列表时， 应考虑将 QoS属性相近的一组 MAC-d流进行复用。
步骤三、 UE发出新数据后如果在相应的 E-HICH上接收到 NACK就启 动该 MAC-e PDU的重发定时器， 在重传次数未达到最大重传次数且重发定 时器未超时前允许重发； 达到最大重传次数或重发定时器超时后，丢弃该分 组。
UE发出新数据后如果接收到 NACK, 意味着该 PDU需要重传，此时判 断当前重传次数是否已达到该分组的最大重传次数， 如果已达到（这种情况 下， 该分组的最大重传次数为 0 ) , 则不再重发， 复位该 HARQ进程， 该 HARQ进程将为其它新数据服务； 如果没有达到最大重传次数， 则启动重发 定时器。 此时如果没有合适的授权资源供重发， 该重传分组继续保存在 HARQ緩冲器中， 等待授权。 当接收到合适的授权资源后， 对该分组进行重 发， 重发计数器自动加 1。
当重发后再次接收到 NACK,则在当前重传次数未达到最大重传次数的 情况下， 继续等待重发资源， 维持原有的重发定时器。
UE在处理增强上行业务过程中， 如果接收到来自高层的无线承载重配 置命令， 且重配置命令中包含了 "T— Retrans" 元素， UE在该消息中指定的 激活时间后启用新的配置参数， 在激活时间到来时， 不改变正在运行的重发 定时器， 在之后启动重发定时器时才使用新的配置信息。
附图 4是增加本发明方法后一个 HARQ进程完整的工作流程图 , 下面 结合附图 4描述本发明的一个具体实施方式：
( 401 ) HARQ进程从 HARQ实体处接收新 MAC-e PDU及其 HARQ服 务属性，其中包含该 MAC-e PDU的最大重传次数、功率偏移和重发定时器， 其中重发定时器是复用到该 MAC-e PDU中各 MAC-d流的重发定时器的最 大值；
( 402 ) HARQ进程要求物理层发送新数据， 并提供必要的物理层参数， 同时初始化自 己的内部变量： 重发定时器 T— Retrans 和重发计数器 N— Retrans。 T— Retrans处于复位状态； N— Retrans清 0。
( 403 ) UE在 E-HICH信道上接收到来自 NodeB的 HARQ指示；
( 404 )判断该 HARQ指示是否为 ACK， 如果 HARQ指示为 ACK, 执 行步骤（405 ) ； 如果 HARQ指示是 NACK, 执行步骤（406 )
( 405 )清除数据， 清除内部变量， 清空 HARQ进程， 该 HARQ进程可 以用于新数据的传输， 流程结束；
( 406 )判断当前重传次数是否小于该分组的最大重传次数， 如果是， 则执行步骤（407 )； 如果当前重传次数等于或大于该分组的最大重传次数， 则执行步驟（405 )
( 407 )该分组等待重传， 判断是否是第一次收到 NACK指示信息， 若 是第一次收到 NACK指示信息 ,执行步骤（ 408 )；若不是第一次收到 NACK 指示信息， 执行步骤 ( 409 ) ；
( 408 ) 启动定时器 T— Retrans;
( 409 )获得合适的重传资源；
( 410 )判断重发定时器是否已经超时， 如果超时， 则不再重发， 返回 执行步骤（405 ) ； 若没有超时， 则执行步骤（411 ) ；
( 411 ) 重传该分组， 并且重传计数器 N_Retrans 自动加 1 , 继续等待 E-HICH的指示， 返回步骤（403 ) 。
上述具体实施方式中，如果分组已经被丟弃，则即使后续接收到 E-HICH 上针对该分组的重传指示也不再处理。
本发明增强上行链路异步混合自动重传请求的重传控制方法中，网络侧 在用户终端的专用媒体接入控制实体流中新增重发定时器参数，用户终端依 据各专用媒体接入控制实体流的定时器参数来设置增强媒体接入控制实体 协议数据单元的重发定时器， 并与最大重传次数相配合进行重传控制， 实现 了无线承载的 QoS 中的重传时延要求， 也实现了网络侧和用户终端协同工 作， 避免了用户终端无谓的重传。 如果窗口机制也用于 HSUPA系统中， 那 么重发定时器和窗口机制一起配合使用， 在 HARQ异步重发机制下实现高 效的分组传输，确保收发两端的状态一致。本发明同时适用于 TD-CDMA系 统和 TD-SCDMA系统。 工业实用性
本发明适用于时分同步码分多址 TD-SCDMA系统， 同时也适用于时分 码分多址系统 TD-CDMA系统。本发明的增强上行链路异步混合自动重传请 007 002462 求的重传控制方法，由网络侧在用户终端的专用媒体接入控制实体流中新增 重发定时器参数，用户终端则依据各专用媒体接入控制实体流的定时器参数 来设置增强媒体接入控制实体协议数据单元的重发定时器，并与最大重传次 数相配合进行重传控制， 实现了无线承载的 QoS 中的重传时延要求， 也实 现了网络侧和用户终端协同工作， 避免了用户终端无谓的重传。

Claims

权 利 要 求 书
1、 一种增强上行链路异步混合自动重传请求的重传控制方法， 其特征 在于， 包括：
( I ) 网络侧在用户终端的各专用媒体接入控制实体流的混合自动重传 请求属性中增加重发定时器参数，用户终端依据复用到增强媒体接入控制实 体协议数据单元中的各专用媒体接入控制实体流的重发定时器参数，设置增 强媒体接入控制实体协议数据单元的重发定时器值；
( 2 ) 用户终端利用增强媒体接入控制实体协议数据单元的重发定时器 值和最大重发次数进行重传控制。
2、 按照权利要求 1所述的增强上行链路异步混合自动重传请求的重传 控制方法， 其特征在于： 所述步骤（1 )具体为：
( I I )网络侧为用户终端配置增强上行链路无线承载时， 在各专用媒体 接入控制实体流的混合自动重传请求服务属性中增加重发定时器参数；
( 12 )用户终端在设置增强媒体接入控制实体协议数据单元的混合自动 重传请求服务属性时，取复用到该增强媒体接入控制实体协议数据单元的各 专用媒体接入控制实体流的重发定时器参数中最大的一个值，作为该增强媒 体接入控制实体协议数据单元的重发定时器值。
3、 按照权利要求 2所述的增强上行链路异步混合自动重传请求的重传 控制方法， 其特征在于： 所述步骤（2 )具体为-.
( 21 )用户终端发出新数据；
( 22 )用户终端在相应的上行增强混合自动重传请求指示信道上接收到 指示信息， 如果该指示信息为不确认信息， 若是所述数据第一次发送后收到 的不确认信息， 则启动该增强媒体接入控制实体协议数据单元的重发定时 器， 执行步骤（23 ) ； 如果该指示信息为确认指示， 则流程结束；
( 23 )用户终端判断当前重传次数是否小于该分组的最大重传次数， 如 果是， 执行步骤（24 ) , 如果当前重传次数等于或大于该分组的最大重传次 数， 则流程结束；
( 24 )增强媒体接入控制实体协议数据单元在重发定时器未超时前， 用 户终端允许重发该数据； 重发定时器超时后， 用户终端丢弃该数据。
4、 按照权利要求 3所述的增强上行链路异步混合自动重传请求的重传 控制方法， 其特征在于： 所述步骤（24 )具体为：
( 241 )用户终端获得重传资源后， 如果重发定时器未超时， 用户终端 重新发送该数据， 并将重发次数加 1， 返回执行步骤（22 ) ； 如果重发定时 器超时， 则用户终端丢弃该数据， 流程结束。
5、 按照权利要求 4所述的增强上行链路异步混合自动重传请求的重传 控制方法， 其特征在于， 所述步骤（22 ) 中进一步包括：
当用户终端重新发送该数据后再次接收到不确认的指示信息，则在当前 重传次数未达到最大重传次数的情况下， 继续等待重发资源， 维持原有的重 发定时器。
6、 按照权利要求 2所述的增强上行链路异步混合自动重传请求的重传 控制方法， 其特征在于， 所述步驟（11 ) 中：
网络侧为用户终端配置增强上行链路无线承载时，在各专用媒体接入控 制实体流的混合自动重传请求服务属性中增加重发定时器参数的步骤中，在 配置重发定时器参数时，所配置的重发定时器参数与网络侧的重排序队列的 定时器相匹配。
7、 按照权利要求 2所述的增强上行链路异步混合自动重传请求的重传 控制方法， 其特征在于， 所述步骤（11 ) 中：
网络侧为用户终端配置增强上行链路无线承载时，在各专用媒体接入控 制实体流的混合自动重传请求服务属性中增加重发定时器参数的步驟中，如 果高速上行分组接入系统中使用了窗口机制，则所配置的重发定时器参数与 为用户设备配置的发送窗口参数相匹配。
8、 按照权利要求 2所述的增强上行链路异步混合自动重传请求的重传 控制方法， 其特征在于， 所述步骤（12 ) 中进一步还包括：
用户终端在设置增强媒体接入控制实体协议数据单元的混合自动重传 请求服务属性时，取复用到该增强媒体接入控制实体协议数据单元的各专用 媒体接入控制实体流的最大重传次数中最大的一个值，作为该增强媒体接入 控制实体协议数据单元的最大重传次数。
9、 按照权利要求 2所述的增强上行链路异步混合自动重传请求的重传 控制方法， 其特征在于， 所述步驟（11 ) 中进一步包括：
所述网络侧的高层为用户终端配置增强上行链路无线承载时，在配置媒 体接入控制实体流的复用列表时， 是将服务质量 QoS属性相近的一组体接 入控制实体流 MAC-d流进行复用的。
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CN101502033B (zh) 2012-08-08
JP2010502053A (ja) 2010-01-21
KR101032621B1 (ko) 2011-05-06
US20110134829A1 (en) 2011-06-09
CN101132260A (zh) 2008-02-27
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EP2061175A1 (en) 2009-05-20
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