WO2010111858A1 - 资源调度方法及用户设备 - Google Patents
资源调度方法及用户设备 Download PDFInfo
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- WO2010111858A1 WO2010111858A1 PCT/CN2009/073763 CN2009073763W WO2010111858A1 WO 2010111858 A1 WO2010111858 A1 WO 2010111858A1 CN 2009073763 W CN2009073763 W CN 2009073763W WO 2010111858 A1 WO2010111858 A1 WO 2010111858A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
Definitions
- the present invention relates to the field of mobile communications technologies, and in particular, to a resource scheduling method and user equipment.
- LTE long term evolution
- SPS semi-persistent scheduling
- the dynamic scheduling algorithm refers to initial transmission and Retransmission uses a scheduling method of dynamic resources.
- the semi-persistent scheduling algorithm refers to a scheduling method that uses static resources and retransmits dynamic resources.
- the allocation of dynamic resources needs to cooperate with relevant control signaling. Since the channel for transmitting control signaling is limited, the capacity of the LTE system will be limited by the capacity of the control signaling channel.
- the capacity of the control signaling channel is regarded as a constant, the capacity of the LTE system is inversely proportional to the number of control signaling required by each user equipment (User Equipment, called UE), so that semi-static scheduling is used.
- the LTE system of the algorithm has a high capacity.
- the LTE system needs to consider the performance of other aspects of the LTE system. Therefore, at present, semi-static scheduling algorithms and dynamic algorithms often exist in the LTE system at the same time.
- the LTE system uses one Transmission Time Interval (TTI) as the transmission basis.
- TTI Transmission Time Interval
- One ⁇ is 1 millisecond, which is equal to the length of one subframe.
- a control signal needs to be transmitted at each ⁇ .
- VoIP Voice of Internet Protocol
- Voice communication mode of the LTE system The characteristics of voice communication are the burstiness and real-time of communication. Therefore, the SPS method can improve the system capacity, and the TTI bundle can also increase the system capacity and obtain a certain coding gain.
- the signaling overhead in the LTE system is huge, accounting for about 30% of the bandwidth.
- the use of TTI bundling and semi-static scheduling can greatly improve the performance of VoIP.
- time division duplex Time Division Duplex
- the method called TTI bundling and semi-persistent scheduling under the TDB is used, so that the capacity of the system under TDD is low and the signaling overhead is large.
- a resource scheduling method includes: the user equipment receives the upper layer signaling sent by the network side, where the upper layer signaling is used to indicate that the user equipment enters the TTI bundle mode and the semi-static scheduling mode; and the user equipment activates the TTI bundle Set mode and semi-static scheduling mode, and communicate with the network side in a semi-static scheduling mode in units of TTI bundles.
- the method further includes: the network side sending the upper layer signaling to the user equipment, where the upper layer signaling carries an identifier indicating the uplink resource, and the uplink resource is semi-static for the user equipment. Scheduled static resources.
- the foregoing upper layer signaling includes: L1/L2 signaling.
- the method further includes: configuring, by the network side, parameters of the TTI bundle and the semi-static scheduling mode, where the parameters include: a size and/or a bundle of the TTI bundle The number of processes is set; the network side sends the configured parameters to the user equipment through system messages.
- the user equipment communicates with the network side by using a semi-persistent scheduling mode in a unit of TTI binding, including: the first transmission of the user equipment and the network side uses a static resource, and the retransmission uses dynamic resources or uses the current transmission process to transmit the previous transmission. Resources used; When the first transmission and the retransmission conflict, the retransmission priority is higher than the first transmission, and the first transmission is postponed to the next TTI bundle.
- the user equipment communicates with the network side by using a TTI bundle as a transmission unit, and the user equipment acquires a bundle process identifier mapped with the current uplink subframe, and the uplink data is transmitted by the bundle process corresponding to the bundle process identifier.
- the method further includes: if the network side does not receive the cached data sent by the user equipment within a predetermined time period, releasing the static resource, and sending a message to the user equipment Let the user equipment enter the dynamic scheduling mode; If the number of uplink scheduling requests from the user equipment received by the network side exceeds a preset threshold, the foregoing upper layer signaling is sent to the user equipment, indicating that the user equipment enters the semi-persistent scheduling mode. Further, the method further includes: the network side transmitting, in the same subframe, the downlink feedback information that is used by the upper layer signaling and the uplink data that is sent by the user equipment.
- the subframe number of the uplink signaling that is transmitted by the network side is n
- the subframe number of the uplink resource is n+k, where n and k are positive integers.
- a user equipment is also provided.
- the user equipment according to the present invention includes: a receiving module, an activation module, and a communication module.
- the receiving module is configured to receive the upper layer signaling sent by the network side, where the upper layer signaling is used to indicate that the user equipment enters the TTI bundle and the semi-static scheduling mode; and the activation module is configured to activate according to the foregoing upper layer signaling.
- the activation signaling is sent to the UE through the network side, so that the UE enters the TTI bundle and semi-static scheduling mode, and communicates with the network side in the TTI bundle and semi-static scheduling modes, thereby improving TDD system capacity reduces signaling overhead and improves system performance.
- FIG. 1 is a flowchart of a resource scheduling method according to an embodiment of the present invention
- FIG. 2 is a schematic diagram of acquiring a bundle process identifier according to an embodiment of the present invention
- FIG. 3 is a resource scheduling according to a preferred embodiment of the present invention.
- FIG. 4 is a schematic structural diagram of a user equipment according to an embodiment of the present invention
- FIG. 5 is a schematic diagram of the scheduling of the first embodiment
- FIG. 6 is a schematic diagram of the scheduling of the second embodiment
- FIG. 7 is a schematic diagram of the scheduling of the third embodiment.
- the embodiment of the present invention proposes an improved resource scheduling scheme, which can be applied to the TDD mode LTE system.
- the network side sends the upper layer signaling to the UE, indicating that the UE enters the TTI bundle and the semi-static scheduling mode, and the UE activates the TTI bundle and the semi-static scheduling mode according to the signaling, and the TTI bundle and The network side communicates with the semi-static scheduling mode.
- the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.
- the preferred embodiments of the present invention are described in the following with reference to the accompanying drawings, which are intended to illustrate and illustrate the invention. According to an embodiment of the present invention, a resource scheduling method is first provided.
- FIG. 1 is a flowchart of a resource scheduling method according to an embodiment of the present invention. As shown in FIG.
- a resource scheduling method mainly includes the following steps (step S101 - step S103 ): Step S101 : UE receives a network side Sending upper layer signaling, where the upper layer signaling is used to indicate that the UE enters the TTI bundle mode and the semi-static scheduling mode; Step S103: The UE activates the TTI bundle mode and the semi-static scheduling mode, and adopts the TTI bundle unit as a unit.
- the semi-static scheduling mode communicates with the network side. Details of each of the above processes are further described below.
- Step S101 the TTI bundle mode and the semi-static scheduling mode are used in the TDD mode. Therefore, the network side needs to configure the TTI bundle and the semi-static schedule.
- the TTI bundle is configured.
- the configuration of the semi-persistent scheduling may be performed by radio resource control (Radio Resource Control, RRC) signaling, where the configured parameters include: the size of the TTI bundle (Size), the number of bundle processes (or the number) And so on, wherein the TTI bundle size indicates the number of subframes occupied by one bundle process in one transmission, and the number of bundle processes refers to the number of bundle processes participating in semi-static scheduling.
- RRC Radio Resource Control
- the scheduling period interval of the semi-persistent scheduling is not required to be configured, and the subframes occupied by the scheduling processes may be determined in a natural ranking order.
- the configured parameters are sent to the UE through system messages.
- the network side sends the foregoing upper layer signaling, where the upper layer signaling carries an identifier indicating an uplink resource (UL grant), where the identifier uses a special identifier.
- the user equipment identifier is semi-statically scheduled, and the uplink resource is a static resource that is semi-statically scheduled by the UE.
- the foregoing upper layer signaling is L1/L2 signaling.
- the network layer may transmit the upper layer signaling and the downlink feedback information corresponding to the uplink data sent by the UE in the same subframe; and the network side may send the foregoing on the subframe n.
- the upper layer signaling indicates that the uplink resource allocated to the UE in the upper layer signaling is in the subframe n+k. Where n and k are positive integers, and the configuration of k is determined according to the TDD configuration and the number of the subframe number, which can be determined according to the provisions in the current specification.
- the UE receives the uplink signaling sent by the network side from the Physical Downlink Control Channel (PDCCH), acquires the uplink resource allocated by the network side, performs a semi-persistent scheduling mode, and uses the uplink resource as the performing half.
- PDCCH Physical Downlink Control Channel
- the UE enters the TTI bundle mode and the semi-static scheduling mode to communicate with the network side. Specifically, the UE communicates with the network side by using one TTI bundle as a transmission unit, and at most one control signaling is required for each TTI bundle, where Each TTI bundle includes a plurality of TTIs.
- the first transmission of the UE and the network side uses static resources.
- the source that is, the uplink resource allocated by the network side
- the UE is only on the Physical Hybrid ARQ Indicator Channel (PHICH).
- PHICH Physical Hybrid ARQ Indicator Channel
- the UE After receiving the ACK signaling (ie, L1/L2 signaling) indicating that the re-information is not received, the UE may also be in the current bundling process.
- the method corresponding to the current bundling process may be determined by using the method shown in FIG. 2) to perform non-adaptive retransmission, that is, using the resources used by the bundling process in the previous transmission for retransmission;
- the retransmission priority is higher than the first transmission, and the first transmission is extended to the next TTI bundle corresponding to the current converging process. Thereby, the uplink coverage is fully improved, and scheduling signaling is saved.
- the UE In the process of the UE communicating with the network side, the UE first obtains the bundle process identifier mapped by the current uplink subframe, and performs scheduling by using the bundle process corresponding to the bundle process identifier to transmit uplink data sent by the UE.
- two loop arrays and two counters can be used to obtain the bundle process ID of the current uplink subframe mapping, wherein the counting index count_frame, the counter count_systemframe, and the counter count_process are used. And a count of ⁇ count—bundling.
- the TDD configuration is 0.
- the loop array on the left of Figure 2 includes 10 bits. Each bit has 1 for the uplink subframe and 0 for the downlink subframe.
- Count_frame indicates the current subframe number
- the counter count_systemframe indicates the system frame number in which the current subframe is located.
- the loop array on the right consists of 14 bytes. Except for the last two bytes, the other bytes include the bundle process ID (bling process ID). The contents of the last two bytes are 0, which does not indicate the bundle. Process ID, only a placeholder.
- the count indicator count_process is used to specify the bundling process ID associated with the current subframe.
- the count subframe count_bundling indicates the position of the current subframe within the current bundling, ranging from 0 to 3. When the knife is set, the count_syetemframe is the nickname of the system, and the count_syetemframe is the subframe number in the current system frame.
- the Count_Process is set according to the ID of the first bundling process, and the ID of the subsequent bundling process is determined according to the Count-Process of the cyclic change.
- the result is: the middle number is count—systmeframe, the sub-sub-number is count_frame, the corresponding bundling process ID is count_process, and count—bundling indicates that the sub-frame is in the current bundling
- the location inside so that the location of the bundled subframe can be obtained in the HARQ retransmission, and the efficiency of the bundling HARQ retransmission is improved.
- the loop array on the left is still 10 bits, and the uplink and downlink configuration settings are set to 0. , 1 bit.
- the bytes of the cyclic input group on the right are set according to the number and size of the bundled processes in each TDD configuration.
- TDD configuration 1 Bottom: The bits in the left loop array are: 0011000110, the right loop number The group size is 8 bytes, and the content is arranged as 11112222.
- TDD configuration 6 The bits in the left loop array are: 0011100110, the right loop array size is 12 bytes, and the content is arranged as 111122223333.
- the network side may also determine whether to release the static resource used by the semi-persistent scheduling by monitoring the buffer status of the UE. When the buffer area of the UE is empty, the UE sends an empty buffer report to the network side.
- the network side determines that the UE enters the inactive period, and the network side releases the static resource allocated for the semi-persistent scheduling, and Sending signaling to the UE, instructing the UE to perform a dynamic scheduling mode, and the UE automatically de-activates the semi-persistent scheduling according to the signaling, and adjusts to a dynamic scheduling mode; and when the UE sends the uplink scheduling request in a predetermined time period, the number exceeds a certain number.
- the network side When the threshold is set, the network side considers that the UE enters the active period, and needs to switch from the dynamic scheduling mode to the semi-persistent scheduling mode.
- the network side sends the above-mentioned upper layer signaling to the UE, allocates semi-statically scheduled static resources to the UE, and performs a semi-persistent scheduling mode.
- the predetermined time period and the threshold may be determined according to a specific application.
- the network side may be an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) base station (eNB).
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- a resource scheduling method according to a preferred embodiment of the present invention mainly includes the following steps (step S301 - step S313): Step S301, UE and The E-UTRAN establishes a communication link.
- Step S302 The E-UTRAN sends configuration signaling of the TTI bundling and the SPS to the UE.
- Step S303 the E-UTRAN sends the activation signaling of the TTI bundling and the SPS to the UE.
- Step S304 the UE communicates with the E-UTRAN in the bundling and SPS modes.
- Step S305 the UE enters an inactive state, and sends an empty buffer state 4 report to the E-UTRAN.
- Step S306 the E-UTRAN sends the anti-activation signaling of the SPS to the UE.
- Step S307 The UE and the E-UTRAN enter an inactive ⁇ 1 dog state, and the service data is exchanged between the UE and the E-UTRAN only through dynamic scheduling.
- Step S308 The L1/L2 scheduling request of the uplink data sent by the UE to the E-UTRAN exceeds a certain threshold, and the specific value of the threshold may be determined according to a specific service.
- Step S309 the E-UTRAN sends an activation signaling of the SPS to the UE.
- Step S310 the UE and the E-UTRAN resume communication, and the service data is exchanged between the UE and the E-UTRAN through semi-static.
- Step S311 The UE determines that the communication task is completed, and sends signaling of disconnecting the link to the E-UTRAN.
- the UE enters the IDLE dog state.
- FIG. 4 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
- a user equipment according to an embodiment of the present invention mainly includes: a receiving module 41, an activation module 43, and a communication module 45.
- the receiving module 41 is configured to receive the upper layer signaling sent by the network side, where the upper layer signaling is used to indicate that the user equipment enters the TTI bundle mode and the semi-static scheduling mode, and the upper layer signaling may also carry the user.
- the device enters a static resource required for semi-persistent scheduling; the activation module 43 is connected to the receiving module 41 for activating the communication module 45 according to the received upper layer signaling; the communication module 45 is connected to the activation module 43 for binding on the TTI
- the network mode is communicated in the set mode and the semi-static scheduling mode.
- Embodiment 1 In this embodiment, an example of LTE TDD configuration 0 will be described.
- FIG. 5 is a schematic diagram of scheduling in the embodiment. In FIG.
- the first behavior system frame number one system frame includes 10 subframes; the second behavior subframe number, one subframe is lms; Configuration mode, where D is downlink, U is uplink; fourth is PHICH information, where PHICH channel includes feedback information of UE uplink data; fifth behavior is original process number in non-b dish dling mode; sixth behavior bundling The bundling process number in the mode. As shown in FIG. 5, in this configuration, the bundling size is 4, and the number of bundling processes is 3. The PHICH feedback information and the retransmission signaling are received in the No. 2 system frame and the No. 0 subframe.
- the PHICH feedback signaling includes the managed subframe number and the feedback of the subframe, which is NACK in this embodiment; the retransmission signaling is located on the PDCCH, and the retransmission signaling allocates dynamic resources to the number 1 bundling process.
- Frame 6 of System Frame 2 Frame 5 of System Frame 4 receives ACK feedback from PHICH of No. 2 Bundling Process; Frame 5 of System Frame No. 3, Frame No. 6 of System Frame No. 5
- the ACK feedback of the PHICH of the Bundling process No. 3 is received; the No. 6 feedback of the No. 4 system frame receives the ACK feedback of the PHICH of the No. 1 bundling process. Since the ACK feedback is received, subsequent transmissions are still performed on the static resources.
- FIG. 6 is a schematic diagram of scheduling in the embodiment.
- the first behavior system frame number 1
- the system frame includes 10 subframes;
- the second behavior subframe number, 1 subframe is lms;
- the third behavior is the uplink and downlink configuration mode;
- the fourth behavior is PHICH information, where the PHICH channel includes feedback information of the UE uplink data;
- the sixth behavior bundling process number in bundling mode As shown in Figure 6, in this configuration, the bundling size is 4, and the number of bundling processes is
- the PHICH feedback information and the retransmission signaling are received in the No. 1 system frame and the No. 6 subframe, where the PHICH feedback information includes the managed subframe number and the feedback to the subframe, which is NACK in this embodiment.
- the retransmission signaling is located on the PDCCH, and the retransmission signaling allocates dynamic resources to the number 1 bundling process.
- Frame 6 of System Frame 2 Frame 6 of System Frame 4 receives ACK feedback from PHICH of No. 2 Bundling Process; Frame No. 6 of System Frame No. 3, Frame No. 6 of System Frame No. 5 ⁇ : ACK feedback to the PHICH of the 1st bundling process; since ⁇ : to ACK feedback, subsequent transmissions are still performed on static resources.
- FIG. 7 is a schematic diagram of scheduling in the embodiment.
- the first behavior system frame number one system frame includes 10 subframes; the second behavior subframe number, one subframe is lms;
- the configuration mode is as follows:
- the PHICH channel includes the feedback information of the UE uplink data;
- the fifth behavior is the original process number in the non-bundling mode;
- the sixth behavior is the bundling process number in the bundling mode.
- the bundling size is 4, and the number of bundling processes is
- the PHICH feedback information and the retransmission signaling are received in the No. 1 system frame and the No. 9 subframe.
- the PHICH feedback signaling includes the managed subframe number and the feedback to the subframe, where is the NACK; the retransmission signaling is located on the PDCCH, and the retransmission signaling allocates the dynamic resource to the number 1 bundling process.
- Subframe No. 2 of system frame No. 2 subframe No. 0 of system frame No. 5 receives NACK feedback of PHICH of No. 2 bundling process, but does not receive retransmission signaling on PDCCH, so non-adaptive retransmission will It occurs on the 8th subframe in the system frame No.
- the technical solution provided by the embodiment of the present invention can be implemented in TDD.
- TTI bundling and semi-persistent scheduling mode the uplink coverage rate can be improved, the signaling overhead can be reduced, the resource utilization can be improved, and the system can be improved, compared to the separate semi-persistent scheduling mode and the separate ⁇ bundling mode. Capacity and system performance.
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Description
资源调度方法及用户设备
技术领域 本发明涉及移动通信技术领域, 尤其涉及一种资源调度方法及用户设 备。 背景技术 长期演进计划 ( long term evolution, 筒称为 LTE ) 系统采用动态调度算 法和半静态调度 ( Semi-persistent scheduling, 筒称为 SPS ) 算法进行资源调 度, 其中, 动态调度算法是指初传和重传均采用动态资源的一种调度方法, 半静态调度算法是指初传采用静态资源,重传采用动态资源的一种调度方法。 动态资源的分配需要配合相关的控制信令。 由于传送控制信令的信道是有限 的, LTE系统的容量将受到控制信令信道容量的限制。 如果把控制信令信道 的容量看作常数, 则 LTE系统的容量与每用户设备( User Equipment , 筒称 为 UE ) 所需要的控制信令的数量成反比关系, 由此可知, 采用半静态调度 算法的 LTE 系统的容量较高。 另夕卜, 除了容量之外, LTE 系统还需要考虑 LTE系统其他方面的性能, 因此, 目前, 在 LTE系统内经常同时存在半静态 调度算法和动态算法。 通常情况下, LTE系统以 1个传输时间间隔(Transmission Time Interval, 筒称为 TTI ) 为传输基础, 1个 ΤΤΙ为 1毫秒, 等于 1个子帧的长度, 在每 个 ΤΤΙ都需要传输一个控制信令, 因此, 以 1个 ΤΤΙ为传输单位会导致信令 消耗较大, 且会存在带宽损失。 将若干个 ΤΤΙ为传输基础 , 则可以节省信令 , 同时还可以得到额外的编码增益, 这种技术被称作为 ΤΤΙ 捆集 ( ΤΤΙ bundling )。 在 LTE系统内 , IP语音 ( Voice of Internet Protocol, 筒称为 VoIP ) 为
LTE系统的语音通信方式。语音通信的特点是通信的突发性和实时性, 因此, 利用 SPS方法可以提高系统容量, 而且采用 TTI捆集也可以提高系统容量, 并可以获得一定的编码增益。 LTE系统内信令开销巨大, 大约占带宽的 30%, 采用 TTI捆集和半静态调度可以大大提高 VoIP的性能。 但在目前的 LTE规范中 , 还没有在时分双工 ( Time Division Duplex,
筒称为 TDD )下同时使用 TTI捆集和半静态调度这两种技术的方法, 从而使 得 TDD下系统的容量低、 信令开销较大。 发明内容 有鉴于此, 本发明提供了一种改进的资源调度方案, 用以解决现有技术 中在 TDD系统的容量不高、 信令开销较大的问题。 才艮据本发明的一个方面 , 提供了一种资源调度方法。 才艮据本发明的资源调度方法包括: 用户设备接收网络侧发送的上层信 令, 其中, 该上层信令用于指示用户设备进入到 TTI捆集模式和半静态调度 模式; 用户设备激活 TTI捆集模式和半静态调度模式 , 并以 TTI捆集为单位 采用半静态调度模式与网络侧进行通信。 进一步地, 在用户设备接收上层信令之前, 该方法还包括: 网络侧向用 户设备发送上层信令, 其中, 该上层信令中携带有指示上行资源的标识, 上 行资源为用户设备进行半静态调度的静态资源。 优选地, 上述上层信令包括: L1/L2信令。 进一步地,在网络侧向用户设备发送上述上层信令之前,该方法还包括: 网络侧配置 TTI捆集和半静态调度模式的参数, 其中, 该参数包括: TTI捆 集的大小和 /或捆集进程的数量; 网络侧通过系统消息将配置的参数发送给用 户设备。 优选地 ,用户设备以 TTI捆集为单位采用半静态调度模式与网络侧进行 通信包括: 用户设备与网络侧的首传使用静态资源, 重传采用动态资源或者 采用当前捆集进程上一次传输所使用的资源; 在首传和重传发生冲突时, 重 传的优先级高于首传, 首传顺延到下一个 TTI捆集。 优选地, 用户设备以一个 TTI捆集为传输单位与网络侧进行通信包括: 用户设备获取与当前上行子帧映射的捆集进程标识, 通过该捆集进程标识对 应的捆集进程传输上行数据。 进一步地, 在用户设备与网络侧进行通信的过程中, 该方法还包括: 如 果网络侧在预定时间段内未接收到用户设备发送的緩存数据, 则释放上述静 态资源, 并向用户设备发送信令, 指示用户设备进入动态调度模式; 如果网
络侧在预定时间段内接收到的来自用户设备的上行调度请求的数量超过预设 阈值, 则向用户设备发送上述上层信令,指示用户设备进入半静态调度模式。 进一步地, 该方法还包括: 网络侧在同一子帧中传输将上述上层信令与 对应于用户设备发送的上行数据的下行反馈信息。 优选地, 网络侧传输上述上层信令的子帧号为 n, 上述上行资源的子帧 号为 n+k, 其中, n和 k为正整数。 根据本发明的另一个方面 , 还提供了一种用户设备。 根据本发明的用户设备包括: 接收模块、 激活模块和通信模块。 其中, 接收模块, 用于接收网络侧发送的上层信令, 其中, 该上层信令用于指示用 户设备进入到 TTI捆集和半静态调度模式; 激活模块, 用于根据上述上层信 令, 激活通信模块; 通信模块, 用于在 TTI捆集和半静态调度模式下与网络 侧进行通信。 通过本发明的上述至少一个方案, 通过网络侧向 UE发送激活信令, 使 UE进入 TTI捆集和半静态调度模式, 在 TTI捆集和半静态调度模式下与网 络侧进行通信, 从而可以提高 TDD 系统容量, 减少信令的开销, 进而提高 系统的性能。 本发明的其它特征和优点将在随后的说明书中阐述, 并且, 部分地从说 明书中变得显而易见, 或者通过实施本发明而了解。 本发明的目的和其他优 点可通过在所写的说明书、 权利要求书、 以及附图中所特别指出的结构来实 现和获得。 附图说明 附图用来提供对本发明的进一步理解, 并且构成说明书的一部分, 与本 发明的实施例一起用于解释本发明 , 并不构成对本发明的限制。 在附图中: 图 1为根据本发明实施例的资源调度方法的流程图; 图 2为根据本发明实施例的获取捆集进程标识的示意图; 图 3为根据本发明优选实施例的资源调度方法的流程图; 图 4为才艮据本发明实施例的用户设备的结构示意图;
图 5为实施例一调度的示意图; 图 6为实施例二调度的示意图; 图 7为实施例三调度的示意图。 具体实施方式 功能相克述 由于半静态调度可以减少控制信令的传输,因而可以提高控制信令信道 的容量 , 而采用将若干个 TTI为传输基础的 TTI捆集 , 也可以节省信令 , 提 高信道容量, 并得到额外的编码增益, 因此, 本发明实施例提出了一种改进 的资源调度方案, 该方案可以应用于 TDD模式的 LTE系统。 在本发明实施 例中, 由网络侧向 UE发送上层信令, 指示 UE进入 TTI捆集和半静态调度 模式, UE根据该信令, 激活 TTI捆集和半静态调度模式, 在 TTI捆集和半 静态调度模式下与网络侧进行通信。 在不冲突的情况下, 本申请中的实施例及实施例中的特征可以相互组 合。 以下结合附图对本发明的优选实施例进行说明, 应当理解, 此处所描述 的优选实施例仅用于说明和解释本发明, 并不用于限定本发明。 才艮据本发明实施例 , 首先提供了一种资源调度方法。 图 1为根据本发明实施例的资源调度方法的流程图, 如图 1所示, 根据 本发明实施例的资源调度方法主要包括以下步骤 (步骤 S101 -步骤 S103 ): 步骤 S101 : UE接收网络侧发送的上层信令, 其中, 该上层信令用于指 示 UE进入到 TTI捆集模式和半静态调度模式; 步骤 S103: UE激活 TTI捆集模式和半静态调度模式, 以 TTI捆集为单 位采用半静态调度模式与网络侧进行通信。 以下进一步描述上述各处理的细节。
(一) 步骤 S101
在本发明实施例中, 由于 UE在 TDD模式下同时使用 TTI捆集模式和 半静态调度模式, 因此, 网络侧首先需要配置 TTI捆集和半静态调度, 在本 发明实施例中 , TTI捆集和半静态调度的配置可以通过无线资源控制 ( Radio Resource Control, 筒称为 RRC )信令进行, 其中, 配置的参数包括: TTI捆 集的大小 (Size )、 捆集进程的数量 (或个数) 等, 其中, TTI捆集大小指明 一个捆集进程一次传输所占用的子帧数, 捆集进程的个数是指参与半静态调 度的捆集进程数。 在本发明实施例中, 不需要配置半静态调度的调度周期间隔, 可以采用 自然的排列顺序确定各调度进程占用的子帧。 网络侧完成上述参数的配置后 ,通过系统消息将配置的参数发送给 UE。 在需要激活 UE进入 TTI捆集模式和半静态调度模式时 , 网络侧向 UE 发送上述上层信令, 该上层信令中携带有指示上行资源 (UL grant ) 的标识, 其中, 该标识采用特殊的半静态调度用户设备标识符, 上述上行资源为 UE 进行半静态调度的静态资源。 优选地, 上述上层信令为 L1/L2信令。 具体地 , 网络侧在向 UE发送上述上层信令时 , 可以在同一子帧中传输 上层信令与对应于 UE发送的上行数据的下行反馈信息; 并且, 网络侧可以 在子帧 n上发送上述上层信令, 而该上层信令中指示为 UE分配的上行资源 在子帧 n+k上。 其中, n 和 k 为正整数, k 的配置才艮据 TDD 配置 ( TDD configuration )和子帧号的编号方式确定, 具体可以才艮据目前规范中的规定确 定。
(二) 步骤 S103
UE从物理下行控制信道 ( Physical Downlink Control Channel, 筒称为 PDCCH )接收到网络侧发送的上述上层信令, 获取网络侧分配的上述上行资 源,进行半静态调度模式,使用该上行资源作为进行半静态调度的静态资源。
UE进入 TTI捆集模式和半静态调度模式与网络侧进行通信 , 具体地 , UE以一个 TTI捆集为传输单位与网络侧进行通信, 在每个 TTI捆集最多需 要一个控制信令, 其中, 每个 TTI捆集包括多个 TTI。 在 ΤΤΙ捆集模式和半静态调度模式下, UE与网络侧的首传采用静态资
源(即上述网络侧分配的上行资源),重传采用动态资源,对于非自适应重传, 即 UE只在物理混合自动重传请求指示信道 ( Physical Hybrid ARQ Indicator Channel, 筒称为 PHICH ) 上接收到非确认 ( Un- Acknowledgement, 筒称为 NACK ) 消息, 而没有接收到相应的指示重传的 PDCCH信令 (即 L1/L2信 令), 则 UE也可以在当前捆集进程所对应的子帧内 (具体可以采用如图 2所 示的方法确定当前捆集进程对应的子帧) 进行非自适应重传, 即使用该捆集 进程在上一次传输时所使用的资源进行重传; 在首传和重传发生冲突时, 重 传的优先级高于首传, 首传顺延到当前捆集进程对应的下一个 TTI捆集。 从 而充分提高了上行覆盖率、 节省了调度信令。 UE 与网络侧进行通信的过程中, UE 首先获取当前上行子帧所映射的 捆集进程标识, 通过与该捆集进程标识对应的捆集进程进行调度, 传输 UE 发送的上行数据。 在具体实施过程中,可以采用两个循环数组和两个计数器来获取当前上 行子帧映射的捆集进程标识, 其中, 主要使用了计数指标 count— subframe, 计数器 count— systemframe , 计数才旨标 count_process 和一个计数子†贞 count— bundling。 以 TDD配置( TDD configuration )为 0的情况为例, 如图 2所示, 图 2 左边的循环数组包括了 10个 bit, 每个 bit中 1表示上行子帧, 0表示下行子 帧 , 计数指标 count— subframe 表示当前所处的子帧号, 计数器 count— systemframe表示当前子帧所处的系统帧号。右边的循环数组包括了 14 个字节, 除最后两个字节外,其他字节包括了捆集进程标识(b皿 dling process ID ) , 最后两个字节的内容为 0 , 不表示捆集进程标识 , 仅为占位符。 计数指 标 count_process 才旨明当前子帧所关联的 bundling process ID , 计数子帧 count— bundling表示当前子帧在当前 bundling 内所处的位置, 取值范围为 0 到 3。 刀^台时, count— syetemframe为当 系纟充†贞号, count— syetemframe为 当前系统帧内的子帧号。 在每个新子帧到来时: count— syetemframe=count—syetemframe + (count_subframe+ 1 )/ 10; count— subframe=(count— sub frame+ 1 )mod 10; 当启动半静态调度和捆集模式时, 首次捆集进程 ID的计算方法如下:
已知一个系统帧内的上行子帧个数为 m, 当前系统帧内 , 当前子帧前的上行 子中贞数为 n, 贝1 J y=Upper[(m* count— syetemframe+n)/4] , 其中 Upper ( x )运 算符是指不小于 x的最小整数, z=y%3 ,则 z即为调度的首次捆集进程的 ID。 首次捆集进程的 ID确定以后,才艮据该首次捆集进程的 ID设置 Count— Process, 以后的捆集进程的 ID就才艮据循环改变的 Count— Process确定。 当 coung— subframe所指的 bit为 0 时, 进行右边循环数组的操作, 即 count_process=(count_process+l)modl4; 当 count_process所才旨单元前后不同 时将 count— bundling清零, 其它 count_bundling=count_bundling+ 1„ 其结果为: 中贞号为 count— systmeframe, 子中贞号为 count— subframe的上行 子中贞所对应的 bundling process ID为 count_process所才旨, 且 count— bundling 指出了该子帧在当前 bundling 内的位置, 从而使得在 HARQ重传可以获取 bundling子帧所处位置 , 提高了 bundling HARQ重传的效率。 其它 TDD配置下, 左边的循环数组仍为 10比特,才艮据上下行配置设置 0, 1 比特。 右边的循环输组各字节根据各 TDD配置下捆集进程的数量和大 小设置。 分别如下:
TDD配置 1 下: 左边循环数组内各比特为: 0011000110, 右边循环数 组大小为 8个字节, 内容排列如 11112222。
TDD配置 6下: 左边循环数组内各比特为: 0011100110, 右边循环数 组大小为 12个字节, 内容排列如 111122223333。 UE与网络侧进行通信的过程中 , 网络侧还可以通过监控 UE的緩存状 态来决定是否释放半静态调度使用的静态资源 , 当 UE的緩存区为空时, UE 向网络侧发送空緩存报告 , 如果在预定时间段内, 网络侧只接收到 UE发送 的空緩存报告, 而没有接收到 UE发送的緩存数据, 则确定 UE进入非活动 期, 网络侧释放为半静态调度分配的静态资源, 并向 UE发送信令, 指示 UE 进行动态调度模式, UE 根据该信令自动对半静态调度进行反激活, 调整为 动态调度模式; 而当 UE在预定时间段内发送的上行调度请求数量超过某个 阈值时, 则网络侧认为 UE进入活动期, 需要从动态调度模式切换至半静态 调度模式, 网络侧向 UE发送上述上层信令, 为 UE分配半静态调度的静态 资源, 进行半静态调度模式, 其中, 上述预定时间段和阈值可以根据具体应 用确定。
在本发明实施例提供的上述方法中,网络侧可以为演进的通用陆地无线 接入网 ( Evolved Universal Terrestrial Radio Access Network , 筒称为 E-UTRAN ) 的基站 (eNB )。 才艮据本发明实施例的上述方法, 可以实现在 TDD中同时使用 TTI捆集 和半静态调度模式,相对于单独的半静态调度模式和单独的 TTI 捆集模式而 言, 可以提高上行覆盖率, 降低信令的开销, 提高的资源利用。 图 3为根据本发明优选实施例的资源调度方法的流程图, 如图 3所示, 根据本发明优选实施例的资源调度方法主要包括以下步骤(步骤 S301 -步骤 S313 ): 步骤 S301 , UE与 E-UTRAN建立通信链接。 步骤 S302, E-UTRAN向 UE发送 TTI bundling和 SPS的配置信令。 步骤 S303 , E-UTRAN向 UE发送和 TTI bundling和 SPS的激活信令。 步骤 S304, UE在 bundling和 SPS模式下与 E-UTRAN进行通信。 步骤 S305 , UE进入非活动状态 , 向 E-UTRAN发送空緩存状态 4艮告。 步骤 S306, E-UTRAN向 UE发送 SPS的反激活信令。 步骤 S307 , UE和 E-UTRAN进入非活动^ 1犬态, jt匕时 UE和 E-UTRAN 之间只通过动态调度进行业务数据的交换。 步骤 S308 , UE向 E-UTRAN发送的上行数据的 L1/L2调度请求超过某 个阈值, 该阈值的具体值可以才艮据具体的业务来确定。 步骤 S309, E-UTRAN向 UE发送 SPS的激活信令。 步骤 S310 , UE和 E-UTRAN恢复通信^!犬态, jt匕时 UE和 E-UTRAN之 间通过半静态进行业务数据的交换。 步骤 S311 , UE判断通信任务完成,向 E-UTRAN发送断开链接的信令。 步骤 S313 , UE和 E-UTRAN断开链接。 UE进入 IDLE 犬态。 根据本发明实施例, 还提供了一种用户设备。
图 4为根据本发明实施例的用户设备的结构示意图, 如图 4所示, 根据 本发明实施例的用户设备主要包括: 接收模块 41、 激活模块 43和通信模块 45。 其中, 接收模块 41 用于接收网络侧发送的上层信令, 其中, 该上层信 令用于指示用户设备进入到 TTI捆集模式和半静态调度模式, 并且, 该上层 信令还可以携带有用户设备进入半静态调度所需的静态资源; 激活模块 43 与接收模块 41连接, 用于根据接收到的上述上层信令, 激活通信模块 45; 通信模块 45与激活模块 43连接, 用于在 TTI捆集模式和半静态调度模式下 与网络侧进行通信。 为进一步理解本发明实施例提供的技术方案的具体实施方式,下面通过 具体的实施例进行说明。 实施例一 在本实施例中, 以 LTE TDD configuration 0例进行说明。 图 5为本实施例中调度的示意图, 在图 5中, 第一行为系统帧号, 1个 系统帧包括 10个子帧; 第二行为子帧号, 1个子帧为 lms; 第三行为上下行 配置模式, 其中, D表示下行, U表示上行; 第四行为 PHICH的信息, 其中, PHICH信道包括 UE上行数据的反馈信息; 第五行为非 b皿 dling模式下的原 始进程号; 第六行为 bundling模式下的 bundling进程号。 如图 5所示, 在该配置下, bundling size为 4, bundling process个数为 3。 在 2号系统帧, 0号子帧下接收到 PHICH的反馈信息和重传信令。 其中, PHICH 反馈信令包含管理的子帧号以及对该子帧的反馈, 在本实施例中为 NACK; 重传信令位于 PDCCH上, 该重传信令给 1号 bundling process分配 动态资源。 2号系统帧的 6号子帧, 4号系统帧的 5号子帧接收到 2号 bundling process的 PHICH的 ACK反馈; 3号系统帧的 5号子帧, 5号系统帧的 6号 子帧接收到 3号 bundling process的 PHICH的 ACK反馈; 4号系统帧的 6号 反馈收到 1号 bundling process的 PHICH的 ACK反馈。由于收到 ACK反馈, 因此, 后续的传输仍然在静态资源上进行。 实施例二 在本实施例中, 以 LTE TDD configuration 1例进行说明。 图 6为本实施例中调度的示意图, 在图 6中, 第一行为系统帧号, 1个
系统帧包括 10个子帧; 第二行为子帧号, 1个子帧为 lms; 第三行为上下行 配置模式; 第四行为 PHICH的信息, 其中, PHICH信道包括 UE上行数据 的反馈信息; 第五行为非 bundling模式下的原始进程号; 第六行为 bundling 模式下的 bundling进程号。 如图 6所示, 在该配置下, bundling size为 4, bundling process个数为
2。 在 1号系统帧, 6号子帧下接收到 PHICH的反馈信息和重传信令, 其中, PHICH 反馈信处包含管理的子帧号以及对该子帧的反馈, 在本实施例中为 NACK; 重传信令位于 PDCCH上, 该重传信令给 1号 bundling process分配 动态资源。 2号系统帧的 6号子帧, 4号系统帧的 6号子帧收到 2号 bundling process的 PHICH的 ACK反馈; 3号系统帧的 6号子帧, 5号系统帧的 6号 子帧^:到 1号 bundling process的 PHICH的 ACK反馈;由于^:到 ACK反馈, 因此后续的传输仍然在静态资源上进行。 实施例三 在本实施例中, 以 LTE TDD configuration 6例进行说明。 图 7为本实施例中调度的示意图, 在图 7中, 第一行为系统帧号, 1个 系统帧包括 10个子帧; 第二行为子帧号, 1个子帧为 lms; 第三行为上下行 配置模式; 第四行为 PHICH的信息, 其中, PHICH信道包括 UE上行数据 的反馈信息; 第五行为非 bundling模式下的原始进程号; 第六行为 bundling 模式下的 bundling进程号。 如图 7所示, 在该配置下, bundling size为 4, bundling process个数为
3。在 1号系统帧, 9号子帧下接收到 PHICH的反馈信息和重传信令。 PHICH 反馈信令包含管理的子帧号以及对该子帧的反馈, 这里为 NACK; 重传信令 位于 PDCCH上, 该重传信令给 1号 bundling process分配动态资源。 2号系 统帧的 6号子帧, 5号系统帧的 0号子帧收到 2号 bundling process的 PHICH 的 NACK反馈, 但没有收到 PDCCH上的重传信令, 因此非自适应重传将发 生在 5号系统帧内的 8号子帧上; 3号系统帧的 5号子帧 ,收到 3号 bundling process的 PHICH的 ACK反馈; 4号系统帧的 1 号反馈收到 1 号 bundling process的 PHICH的 ACK反馈。 其它接收到 ACK反馈的 bundling process 的后续的传输仍然在静态资源上进行。 如上所述, 借助本发明实施例提供的技术方案, 可以实现在 TDD中同
时使用 TTI捆集和半静态调度模式, 相对于单独的半静态调度模式和单独的 ΤΤΙ 捆集模式而言, 可以提高上行覆盖率, 降低信令的开销, 提高的资源利 用 , 进而可以提高系统容量和系统的性能。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本 领域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的^^申和 原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护 范围之内。
Claims
1. 一种资源调度方法, 其特征在于, 包括:
用户设备接收网络侧发送的上层信令, 其中, 所述上层信令用于指 示所述用户设备进入到传输时间间隔 TTI捆集模式和半静态调度模式; 所述用户设备激活 TTI捆集模式和半静态调度模式,并以 TTI捆集 为单位采用半静态调度模式与所述网络侧进行通信。
2. 才艮据权利要求 1所述的方法, 其特征在于, 所述用户设备接收所述上层 信令之前, 所述方法还包括:
所述网络侧向所述用户设备发送所述上层信令, 其中, 所述上层信 令中携带有指示上行资源的标识, 所述上行资源为所述用户设备进行半 静态调度的静态资源。
3. 根据权利要求 2 所述的方法, 其特征在于, 所述上层信令包括: L1/L2 信令。
4. 根据权利要求 2或 3所述的方法, 其特征在于, 在所述网络侧向所述用 户设备发送所述上层信令之前, 所述方法还包括:
所述网络侧配置 TTI捆集和半静态调度模式的参数, 其中, 所述参 数包括: TTI捆集的大小和 /或捆集进程的数量;
所述网络侧通过系统消息将配置的所述参数发送给所述用户设备。
5. 才艮据权利要求 1 中所述的方法, 其特征在于, 所述用户设备以 TTI捆集 为单位采用半静态调度模式与所述网络侧进行通信包括:
所述用户设备与所述网络侧的首传使用静态资源 ,重传采用动态资 源或者采用当前捆集进程上一次传输所使用的资源;
在首传和重传发生冲突时, 重传的优先级高于首传, 首传顺延到当 前捆集进程对应 TTI捆集的下一个 TTI捆集。
6. 根据权利要求 1所述的方法, 其特征在于, 所述用户设备以一个 TTI捆 集为传输单位与所述网络侧进行通信包括:
所述用户设备获取与当前上行子帧映射的捆集进程标识 ,通过所述 捆集进程标识对应的捆集进程传输上行数据, 其中, 半静态调度模式的 调度才艮据 TTI捆集的自然顺序确定。
7. 根据权利要求 2或 3所述的方法 , 其特征在于 , 在所述用户设备与所述 网络侧进行通信的过程中, 所述方法还包括:
如果所述网络侧在预定时间段内未接收到所述用户设备发送的緩 存数据 4艮告, 则释放所述静态资源, 并向所述用户设备发送信令, 指示 所述用户设备进入动态调度模式;
如果网络侧在预定时间段内接收到的来自所述用户设备的上行调 度请求的数量超过预设阈值, 则向所述用户设备发送所述上层信令 , 指 示所述用户设备进入半静态调度模式。
8. 根据权利要求 7所述的方法, 其特征在于, 所述方法还包括:
所述网络侧在同一子帧中传输将所述上层信令与对应于所述用户 设备发送的上行数据的下行反馈信息。
9. 根据权利要求 2或 7所述的方法 , 其特征在于, 所述网络侧传输所述上 层信令的子帧号为 n, 所述上行资源的子帧号为 n+k, 其中, n和 k为正 整数。
10. 一种用户设备, 其特征在于, 包括:
接收模块, 用于接收网络侧发送的上层信令, 其中, 所述上层信令 用于指示所述用户设备进入到传输时间间隔 TTI 捆集和半静态调度模 式;
激活模块, 用于根据所述上层信令, 激活通信模块; 通信模块,用于在 TTI捆集和半静态调度模式下与所述网络侧进行 通信。
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