WO2016086715A1 - 一种混合自动重传请求进程数分配方法和装置 - Google Patents

一种混合自动重传请求进程数分配方法和装置 Download PDF

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WO2016086715A1
WO2016086715A1 PCT/CN2015/091575 CN2015091575W WO2016086715A1 WO 2016086715 A1 WO2016086715 A1 WO 2016086715A1 CN 2015091575 W CN2015091575 W CN 2015091575W WO 2016086715 A1 WO2016086715 A1 WO 2016086715A1
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harq
harq processes
allocated
delay
loopback
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粟中权
王宏志
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中兴通讯股份有限公司
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    • 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

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  • the present invention relates to the field of WCDMA (Wideband Code Division Multiple Access) and subsequent evolution, and in particular, to a method and an apparatus for allocating a number of downlink hybrid automatic repeat request processes.
  • WCDMA Wideband Code Division Multiple Access
  • HSDPA High Speed Downlink Packet Access
  • HARQ Hybrid Automatic Repeat Request
  • the NodeB base station
  • RNC Radio Network Controller
  • the number of HARQ processes allocated by the RNC is further reported to the UE (User Equipment) by the RB Setup (Radio Bear Setup).
  • one HARQ process is required for each HSDPA scheduling.
  • the NodeB uses a HARQ process for scheduling, it needs to receive the response from the UE to this scheduling before continuing to use the HARQ process for scheduling.
  • the NodeB may not be able to schedule the HSDPA data of the UE because there is no HARQ process, thereby causing the UE rate to drop.
  • a common method for allocating the number of HARQ processes is obtained by dividing the number of soft channel bits of the UE by the maximum number of bits that the physical layer of the UE can receive per TTI (Transmission Time Interval). After the UE's HSDPA capability level is determined, the number of soft channel bits of the UE and the maximum number of bits that can be received by the physical layer of each TTI UE are clearly stated in the protocol.
  • the number of HARQ processes allocated by this method may be smaller than the HARQ loopback delay value, resulting in dissatisfaction of scheduling and a decrease in UE rate.
  • the embodiment of the invention provides a technical solution for the method for allocating the automatic retransmission request process number, which is used to solve the problem that the HSDPA user data cannot be scheduled because the number of HARQ processes is insufficient.
  • an embodiment of the present invention provides a method for allocating a number of HARQ processes, including:
  • the number of pre-allocated HARQ processes is obtained according to the number of soft channel bits of the UE divided by the maximum number of bits received by the physical layer of the UE;
  • calculating a HARQ loopback delay of the UE according to the NodeB access service Preferably, calculating a HARQ loopback delay of the UE according to the NodeB access service
  • the NodeB access service includes: a number of users, a throughput rate, and the like.
  • the number of the pre-allocated HARQ processes is less than the delay of the HARQ loopback, the number of actually allocated HARQ processes is equal to the HARQ loopback delay value;
  • the number of the pre-allocated HARQ processes is greater than or equal to the delay of the HARQ loopback, the number of actually allocated HARQ processes is equal to the number of the pre-allocated HARQ processes.
  • an embodiment of the present invention provides a hybrid automatic repeat request process number allocation apparatus, including:
  • the pre-allocation module is set to pre-allocate the number of HARQ processes and calculate a HARQ loopback delay
  • the number of pre-allocated HARQ processes is obtained according to the number of soft channel bits of the UE divided by the maximum number of bits received by the physical layer of the UE;
  • the HARQ loopback delay of the UE is calculated according to the NodeB access service.
  • the NodeB access service includes: a number of users, a throughput rate, and the like.
  • the actual allocation module is configured to obtain the actual number of HARQ processes according to the number of pre-allocated HARQ processes and the HARQ loopback delay;
  • the number of the pre-allocated HARQ processes is less than the delay of the HARQ loopback, the number of actually allocated HARQ processes is equal to the delay of the HARQ loopback;
  • the number of the pre-allocated HARQ processes is greater than or equal to the HARQ loopback delay
  • the number of actually allocated HARQ processes is equal to the number of the pre-allocated HARQ processes.
  • the embodiment of the present invention provides a method for allocating the number of HARQ processes according to the HARQ loopback delay value, which can improve the scheduling times of the HSDPA users, thereby improving the HSDPA user rate and the HSDPA throughput rate of the cell, and avoiding that the NodeB cannot be processed due to the absence of the HARQ process. Scheduling the HSDPA data of the UE greatly improves user satisfaction.
  • FIG. 1 is a schematic diagram of a hybrid automatic repeat request process number allocation method according to an embodiment of the present invention
  • Figure 2 is a flow chart of an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a hybrid automatic repeat request process number allocation apparatus according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a HARQ process number allocation method according to an embodiment of the present invention, which includes two steps: first, pre-allocating the number of HARQ processes and calculating a HARQ loopback delay; second, according to the number of pre-allocated HARQ processes and HARQ The loopback delay is obtained, and the actual number of HARQ processes is obtained.
  • the HARQ loopback delay value refers to that the NodeB uses a HARQ process for scheduling. After receiving the ACK/NACK response, the same HARQ process is used for scheduling.
  • the two schedulings are performed in units of 2 ms TTI (Transmission Time Interval).
  • a common method for allocating HARQ processes is obtained by dividing the number of soft channel bits of the UE by the maximum number of bits that can be received by the physical layer of each TTI UE.
  • the number of soft channel bits is the sum of the storage space sizes of all the HARQ processes, and is used by the UE to store data of the HS-DSCH (High-Speed Downlink Shared Channel) channel.
  • the maximum number of bits that can be received by each TTI UE physical layer reflects the UE physical layer receiving HS-PDSCH (High-Speed) Physical Downlink Shared Channel A capability of a physical channel, which refers to how many bits the UE can receive the HS-PDSCH channel every 2 ms. This value is equal to the size of the virtual incremental buffer (NIR, Vital Incremental Redundancy Buffer) on the protocol.
  • NIR Virtual Incremental Redundancy Buffer
  • the NodeB When receiving the radio link setup or radio link reconfiguration preparation message with the HSDPA service, the NodeB calculates the HARQ loopback delay of the HSDPA user according to the service status of the current NodeB access.
  • the HARQ loopback delay of the HSDPA user can be obtained according to the sum of the weighted value of the number of HSDPA users that the current NodeB has accessed and the weighted value of the HSDPA throughput rate. The number of HSDPA users connected to the NodeB is increased, and the HSDPA throughput rate is high, which will increase the HARQ loopback delay of HSDPA users.
  • FIG. 2 is a flowchart of an implementation of an embodiment of the present invention, and the steps are as follows:
  • the NodeB receives the radio link establishment or radio link reconfiguration preparation message of the RNC with the HSDPA service, and calculates the HARQ loopback delay of the UE according to the access service of the RNC.
  • the NodeB obtains a pre-allocated HARQ process number according to the number of soft channel bits of the UE according to the maximum number of bits that the UE can receive in the physical layer of the TTI UE every 2 ms.
  • S203 If the number of pre-assigned HARQ processes is smaller than the HARQ loopback delay value, then go to S204. If the number of pre-allocated HARQ processes is greater than or equal to the HARQ loopback delay value, go to S205.
  • the actually allocated number of HARQ processes is equal to the number of pre-allocated HARQ processes.
  • the NodeB notifies the RNC of the number of the actually allocated HARQ processes by using the radio link setup response or the radio link reconfiguration preparation completion message, and the RNC notifies the UE of the actually allocated number of HARQ processes by using the RB establishment signaling.
  • Figure 3 is a schematic illustration of an apparatus in accordance with an embodiment of the present invention.
  • the device includes: a pre-allocation module, configured to pre-allocate the number of HARQ processes and calculate a HARQ loopback delay; and the actual allocation module is configured to obtain an actual HARQ process according to the number of pre-allocated HARQ processes and the HARQ loopback delay. Number.
  • the computer program can be implemented in a computer readable storage medium, the computer program being executed on a corresponding hardware platform (such as a system, device, device, device, etc.), when executed, including One or a combination of the steps of the method embodiments.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.
  • Each of the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • Each device/function module/functional unit in the above embodiments may be stored in a computer readable storage medium when implemented in the form of a software function module and sold or used as a standalone product.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the embodiment of the present invention provides a method for allocating the number of HARQ processes according to the HARQ loopback delay value, which can improve the scheduling times of the HSDPA users, thereby improving the HSDPA user rate and the HSDPA throughput rate of the cell, and avoiding that the NodeB cannot be processed due to the absence of the HARQ process. Scheduling the HSDPA data of the UE greatly improves user satisfaction.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

一种混合自动重传请求HARQ进程数分配方法和装置，涉及WCDMA及其后续演进领域。该方法包括：预分配混合自动重传请求HARQ进程个数并且计算HARQ环回时延；根据预分配HARQ进程个数和HARQ环回时延，得出实际HARQ进程个数。该装置包括：预分配模块和实际分配模块。通过本发明实施例提高HSDPA用户的调度次数，从而达到提高HSDPA用户速率和小区HSDPA吞吐率的效果，极大提高了用户满意度。

Description

一种混合自动重传请求进程数分配方法和装置 技术领域
本发明涉及WCDMA(Wideband Code Division Multiple Access，宽带码分多址)及后续演进领域，特别涉及一种下行混合自动重传请求进程数的分配方法和装置。
背景技术
在3GPP(the 3rd Generation Partner Project，第三代合作伙伴计划)协议中，HSDPA(High Speed Downlink Packet Access，高速下行分组接入)用户HARQ(Hybrid Automatic Repeat Request，混合自动重传请求)进程个数由NodeB(基站)分配，然后在NBAP(NodeB Application Part，基站应用部分)信令的无线链路建立响应或无线链路重配准备完成信令里告知RNC(Radio Network Controller，无线网络控制器)所分配的HARQ进程个数，RNC再通过RBSetup(Radio Bear Setup，无线承载建立过程)信令通知UE(User Equipment，用户设备)HARQ进程个数。
根据HSDPA业务中的混合自动重传的原理，每次HSDPA调度需要一个HARQ进程。NodeB使用一HARQ进程进行调度以后，需要接收到UE对此次调度的回应以后才能继续使用这个HARQ进程进行调度。根据HSDPA混合自动重传的原理，如果HARQ环回时延值大于UE的HARQ进程数，则会出现NodeB因为没有HARQ进程而无法调度UE的HSDPA数据，从而导致UE速率下降的情况。常见的HARQ进程个数分配方法是根据UE的软信道比特数除以每TTI(Transmission Time Interval，传输时间间隔)UE物理层可以接收的最大比特数得到。UE的HSDPA能力级确定后，UE的软信道比特数和每TTI UE物理层可以接收的最大比特数在协议里有明确说明。使用这种方法所分配得出的HARQ进程数可能比HARQ环回时延值要小，导致调度不满，UE速率下降。
发明内容
本发明实施例提供一种混合自动重传请求进程数分配方法的技术方案，用于解决因为HARQ进程数不足而无法调度HSDPA用户数据的问题。
第一方面，本发明实施例提供一种HARQ进程数分配的方法，包括：
首先，预分配HARQ进程个数和并且计算HARQ环回时延；
优选地，根据所述UE的软信道比特数除以UE物理层接收的最大比特数，得到预分配HARQ进程个数；
优选地，根据NodeB接入业务计算所述UE的HARQ环回时延；
优选地，所述NodeB接入业务包括：用户数和吞吐率等。
其次，根据预分配HARQ进程个数和HARQ环回时延，得出实际HARQ进程个数；
优选地，当所述预分配HARQ进程个数小于所述HARQ环回时延时，实际分配HARQ进程个数等于所述HARQ环回时延值；
优选地，当所述预分配HARQ进程个数大于或等于所述HARQ环回时延时，实际分配HARQ进程个数等于所述预分配HARQ进程个数。
第二方面，本发明实施例提供一种混合自动重传请求进程数分配装置，包括：
首先，预分配模块，设置为预分配HARQ进程个数并且计算HARQ环回时延；
优选地，根据所述UE的软信道比特数除以UE物理层接收的最大比特数，得到预分配HARQ进程个数；
优选地，根据NodeB接入业务计算所述UE的HARQ环回时延。
优选地，所述NodeB接入业务包括：用户数和吞吐率等。
其次，实际分配模块，设置为根据预分配HARQ进程个数和HARQ环回时延，得出实际HARQ进程个数；
优选地，当所述预分配HARQ进程个数小于所述HARQ环回时延时，实际分配HARQ进程个数等于所述HARQ环回时延时；
优选地，当所述预分配HARQ进程个数大于或等于所述HARQ环回时延 时，实际分配HARQ进程个数等于所述预分配HARQ进程个数。
本发明实施例提出根据HARQ环回时延值分配HARQ进程数的方法，可以提高HSDPA用户的调度次数，从而达到提高HSDPA用户速率和小区HSDPA吞吐率的效果，避免了NodeB由于没有HARQ进程而无法调度UE的HSDPA数据的情况，极大提高了用户满意度。
附图概述
为了更清楚地说明本发明实施例或现在技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍。
图1是本发明实施例的一种混合自动重传请求进程数分配方法的示意图；
图2是本发明实施例的流程图；
图3是本发明实施例的一种混合自动重传请求进程数分配装置的示意图。
本发明的较佳实施方式
图1所示本发明实施例的一种HARQ进程数分配方法示意图，包括两个步骤：首先，预分配HARQ进程个数和计算HARQ环回时延；其次，根据预分配HARQ进程个数和HARQ环回时延，得出实际HARQ进程个数。HARQ环回时延值是指NodeB使用一HARQ进程进行调度，收到ACK/NACK响应以后，使用相同的HARQ进程进行调度，两次调度以2ms TTI(Transmission Time Interval，传输时间间隔)为单位的HS-SCCH(Shared Control Channel for HS-DSCH，高速共享控制信道)信道空口发送时刻之差。常见的HARQ进程个数分配方法是根据UE的软信道比特数(Total number of soft channel bits)除以每TTI UE物理层可以接收的最大比特数得到。软信道比特数是所有HARQ进程的存储空间大小之和，是UE用来存储HS-DSCH(High-Speed Downlink Shared Channel，高速下行链路共享信道)信道的数据的。每TTI UE物理层可以接收的最大比特数体现了UE物理层接收HS-PDSCH(High-Speed  Physical Downlink Shared Channel高速物理下行链路共享信道)物理信道的一个能力，是指每2ms UE最多能接收HS-PDSCH信道多少比特。这个数值，与协议上的虚拟增量冗余缓冲器(NIR，Vitual Incremental Redundancy Buffer)大小相等。UE的HSDPA能力级确定后，UE的软信道比特数和每TTI UE物理层可以接收的最大比特数就确定下来了，因为这两个值在协议里有明确规定。
NodeB在收到带HSDPA业务的无线链路建立或无线链路重配准备消息时，根据当前NodeB接入的业务情况计算出此HSDPA用户的HARQ环回时延。通常，HSDPA用户的HARQ环回时延可以根据当前NodeB已接入的HSDPA用户数的加权值与HSDPA吞吐率的加权值之和得出。NodeB上已接入的HSDPA用户数增多，HSDPA吞吐率变高，都会使HSDPA用户的HARQ环回时延变大。
图2所示本发明实施例的实施流程图，步骤如下：
S201：NodeB收到RNC带HSDPA业务的无线链路建立或无线链路重配准备消息，根据自身的接入业务计算出此UE的HARQ环回时延。
S202：NodeB根据此UE的软信道比特数除以此UE每2ms TTI UE物理层可以接收的最大比特数，得到一个预分配的HARQ进程个数。
S203：如果预分配的HARQ进程数比HARQ环回时延值小，则转S204，如果预分配的HARQ进程数大于或者等于HARQ环回时延值，则转S205。
S204：实际分配的HARQ进程数等于HARQ环回时延值。转S206。
S205：实际分配的HARQ进程数等于预分配的HARQ进程数。
S206：NodeB把实际分配的HARQ进程数通过无线链路建立响应或无线链路重配准备完成消息通知RNC，RNC通过RB建立信令把实际分配的HARQ进程数通知UE。
图3是本发明实施例的装置示意图。所述装置包括：预分配模块，设置为预分配HARQ进程个数和计算HARQ环回时延；实际分配模块，设置为根据预分配HARQ进程个数和HARQ环回时延，得出实际HARQ进程个数。
本领域普通技术人员可以理解上述实施例的全部或部分步骤可以使用计 算机程序流程来实现，所述计算机程序可以存储于一计算机可读存储介质中，所述计算机程序在相应的硬件平台上(如系统、设备、装置、器件等)执行，在执行时，包括方法实施例的步骤之一或其组合。
可选地，上述实施例的全部或部分步骤也可以使用集成电路来实现，这些步骤可以被分别制作成一个个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明实施例不限制于任何特定的硬件和软件结合。
上述实施例中的每个装置/功能模块/功能单元可以采用通用的计算装置来实现，它们可以集中在单个的计算装置上，也可以分布在多个计算装置所组成的网络上。
上述实施例中的每个装置/功能模块/功能单元以软件功能模块的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。上述提到的计算机可读取存储介质可以是只读存储器，磁盘或光盘等。
以上所述，仅为本发明实施例的实施方式。因此，本发明的保护范围应以权利要求所述的保护范围为准。
工业实用性
本发明实施例提出根据HARQ环回时延值分配HARQ进程数的方法，可以提高HSDPA用户的调度次数，从而达到提高HSDPA用户速率和小区HSDPA吞吐率的效果，避免了NodeB由于没有HARQ进程而无法调度UE的HSDPA数据的情况，极大提高了用户满意度。

Claims (8)

  1. 一种混合自动重传请求HARQ进程数分配方法，包括：
    预分配混合自动重传请求HARQ进程个数并且计算HARQ环回时延；
    根据预分配HARQ进程个数和HARQ环回时延，得出实际HARQ进程个数。
  2. 如权利要求1所述的方法，其中，所述预分配混合自动重传请求HARQ进程个数并且计算HARQ环回时延包括：
    根据所述用户设备UE的软信道比特数除以UE物理层接受的最大比特数，得到所述预分配HARQ进程个数；
    根据基站NodeB接入业务计算所述UE的所述HARQ环回时延
  3. 根据权利要求1所述的方法，其中，所述根据预分配HARQ进程个数和HARQ环回时延，得出实际HARQ进程个数包括：
    当所述预分配HARQ进程个数小于所述HARQ环回时延时，实际分配HARQ进程个数等于所述HARQ环回时延时；
    当所述预分配HARQ进程个数大于或等于所述HARQ环回时延时，实际分配HARQ进程个数等于所述预分配HARQ进程个数。
  4. 如权利要求2所述的方法，其中，所述基站NodeB接入业务包括：用户数和吞吐率。
  5. 一种混合自动重传请求HARQ进程数分配装置，其中，所述装置包括：
    预分配模块，设置为预分配HARQ进程个数并且计算HARQ环回时延；
    实际分配模块，设置为根据预分配HARQ进程个数和HARQ环回时延，得出实际HARQ进程个数。
  6. 如权利要求5所述的装置，其中，所述预分配模块预分配HARQ进程个数和计算HARQ环回时延包括：
    根据所述UE的软信道比特数除以UE物理层接受的最大比特数，得到预分配HARQ进程个数；
    根据基站NodeB接入业务计算所述UE的HARQ环回时延。
  7. 如权利要求5所述的装置，其中，所述实际分配模块根据预分配HARQ进程个数和HARQ环回时延，得出实际HARQ进程个数包括：
    当所述预分配HARQ进程个数小于所述HARQ环回时延时，实际分配HARQ进程个数等于所述HARQ环回时延时；
    当所述预分配HARQ进程个数大于或等于所述HARQ环回时延时，实际分配HARQ进程个数等于所述预分配HARQ进程个数
  8. 如权利要求5所述的装置，其中，所述基站NodeB接入业务包括：用户数和吞吐率。
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