WO2009076903A1 - 调整nhr参考值的方法、系统和装置 - Google Patents

调整nhr参考值的方法、系统和装置 Download PDF

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Publication number
WO2009076903A1
WO2009076903A1 PCT/CN2008/073467 CN2008073467W WO2009076903A1 WO 2009076903 A1 WO2009076903 A1 WO 2009076903A1 CN 2008073467 W CN2008073467 W CN 2008073467W WO 2009076903 A1 WO2009076903 A1 WO 2009076903A1
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WIPO (PCT)
Prior art keywords
nhr
load
reference value
cell
threshold
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PCT/CN2008/073467
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English (en)
French (fr)
Inventor
Dingzhang Dai
Chengyi Wang
Hua Cai
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Huawei Technologies Co., Ltd.
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Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to EP08863088A priority Critical patent/EP2214339A4/en
Priority to BRPI0821194-9A priority patent/BRPI0821194A2/pt
Publication of WO2009076903A1 publication Critical patent/WO2009076903A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements 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
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1825Adaptation of specific ARQ protocol parameters according to transmission conditions
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements 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
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812Hybrid protocols; Hybrid automatic repeat request [HARQ]

Definitions

  • the present invention relates to the field of communications, and in particular to an adjustment hybrid automatic retransmission (HARQ, Hybrid)
  • NHR Number of HARQ
  • WCDMA Wideband Code Division Multiple Access
  • NodeB NodeB implementation of user equipment
  • the HARQ protocol is an improvement of the ARQ protocol, and can add packet redundancy information in an ARQ system that requires a retransmission of a data transmission failure.
  • the HARQ mechanism has many forms. For example, the same mechanism as ARQ can be used, that is, if a data packet is received and cannot be correctly decoded, it is directly discarded, and a packet retransmission request is returned in the uplink channel, and the request is heavy.
  • the original data is transmitted; the data packet carrying the error may not be discarded, and then the data packet carrying the redundant information may be retransmitted to be combined with the previous data packet to obtain the correct data packet. Therefore, under the HARQ protocol, it may be necessary to transmit multiple times before receiving the correct data packet, and the NHR of a data packet HARQ can reflect the service quality of the system (QoS, Quality of
  • OLPC Outer Loop Power
  • SIR Signal interference
  • the target value which is to keep the UE a certain average NHR, that is, to make the number of retransmissions of the data packet meet the QoS requirements.
  • the NHR reference value used for QoS control is a fixed value set to meet the user's Q oS requirement, the current QoS control cannot comprehensively consider the system load problem, for example, when the load In the lighter case, if the NHR reference value is configured to be large, the service cannot reach the limit rate. When the load is heavy, if the NHR reference value is configured to be small, the capacity of the cell is wasted.
  • embodiments of the present invention provide a method, system, and apparatus for adjusting an NHR reference value.
  • an embodiment of the present invention provides a method for adjusting an NHR reference value, which is used to determine an average retransmission number NHR reference value used in quality of service control, and the method includes:
  • an embodiment of the present invention provides an apparatus for adjusting an NHR reference value, where the apparatus includes: [15] a comparison module, configured to compare an average load of a cell with a preset load threshold;
  • the adjustment module is configured to adjust the current NHR reference value according to the comparison result obtained by the comparison module.
  • an embodiment of the present invention provides a system for adjusting an NHR reference value, where the system includes: [18] at least one base station, configured to report an average load of a cell;
  • the adjusting device is configured to compare the average load of the cell with a preset load threshold value and adjust the current NHR reference value according to the comparison result.
  • the method, device, and system for adjusting the NHR reference value provided by the embodiment of the present invention adjust the NHR reference value according to the average load of the cell, so that the NHR reference value can be dynamically adjusted, so that the cell load can be easily tapped. Adjust the NHR reference value used by QoS control, or increase the load by appropriate
  • FIG. 1 is a schematic structural diagram of a protocol of an HSUPA according to an embodiment of the present invention
  • FIG. 2 is a schematic flow chart of a method for adjusting an NHR reference value according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a method for adjusting an NHR reference value according to another embodiment of the present invention.
  • FIG. 4 is a schematic flow chart of a method for adjusting an NHR reference value according to still another embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a system for adjusting an NHR reference value used in an embodiment of the present invention.
  • the implementation of the controller is as shown in FIG. 1.
  • the protocol structure of the HSUPA mainly includes the UE, the NodeB s drift radio network controller (DRNC, Drift Radio Network).
  • DRNC drift radio network controller
  • An entity such as the controller and the SRNC, where the UE and the NodeB are connected through the Uu interface; the DRNC and the Nod eB are connected through the Iub interface.
  • SRNC and DRNC can exchange information through the Iur interface, which can be a radio network controller (RNC, Radio Network).
  • RNC Radio Network Controller
  • the SRNC is responsible for data transmission between the core network and the user, and transfer and reception of Iu interface signaling, responsible for performing radio resource control including quality of service control, and performing L2 layer processing on data of the air interface, that is, media access.
  • Control MAC, Medium Access Control
  • RLC Radio Link Control
  • basic radio resource management operations such as handover decision, outer loop power control, and radio access bearer (RAB, Radio Access)
  • the parameters of Bearer are used to transfer channel parameters to the air interface.
  • MAC-d denotes a MAC entity that handles a dedicated logical channel and a dedicated transport channel allocated to one UE, each UE having one MAC-d.
  • the UTRAN has a corresponding MAC-d corresponding thereto; the MAC-es, MAC-e entity is the added MA after the introduction of HSUPA by the WCDMA system.
  • C layer entity In order to support the fast scheduling of the NodeB, the MAC-e entity on the UTRAN side is moved down to the Noode B; in order to support the macro diversity of the HSUPA, the MAC-es is located in the SRNC.
  • the embodiment of the present invention provides a method for adjusting an NHR reference value.
  • a method for adjusting an NHR reference value is: comparing an average load of each cell in an active set with a preset load threshold; Compare the results and adjust the current NHR reference value.
  • FIG. 2 is a schematic flow chart of a method for adjusting an NHR reference value used in an embodiment of the present invention. As shown in Figure 2, the method can include:
  • the average load of each cell in the active set may be obtained from the measurement report reported by the base station of each cell, or the average load of the cell may be extracted from the database of the wireless controller.
  • the base station of each cell can measure the actual load of the cell periodically or irregularly, and after averaging, obtain the average load of the cell.
  • the number of cells in one active set may be one or more.
  • [35] 202 Compare the average load of the cell with a preset load threshold.
  • the preset load threshold may be one or two. After having two load thresholds, it can be represented as a first load threshold and a second load threshold respectively.
  • the set first load threshold corresponds to a heavy load, for example, a cell.
  • the average load reaches 80%, that is, there are more terminals connected, and the actual used capacity accounts for 80% of the total capacity.
  • the second load threshold corresponds to the case where the load is light, such as the average load of the cell reaches 20%.
  • the first load threshold corresponds to a heavy load
  • the cell is obtained.
  • the average load exceeds the comparison result of the first load threshold. In this case, the NHR reference value can be adjusted upwards. Otherwise, no adjustment is made.
  • the second load threshold corresponds to the case where the load is light
  • all cells in the active set or the cells reaching the set ratio are lower than the second load gate.
  • the limit value ⁇ the comparison result that the average load of the cell is lower than the second load threshold is obtained, and thus, the NHR reference value can be adjusted downward, otherwise, no adjustment is made.
  • the active set refers to a set of all wireless links that establish communication services with a certain UE, and the radio link corresponds to a specific cell for the UE.
  • [40] 203 Adjust the NHR reference value based on the comparison result.
  • the current NHR reference value is adjusted upward, for example, the current NHR reference value may be adjusted to the upper limit value of the preset NHR reference value, or according to The preset step size adjusts the current NHR reference value upwards.
  • the current NHR reference value is adjusted downward.
  • the current NHR reference value may be adjusted to the lower limit value of the preset NHR reference value. , or adjust the current NHR reference value downward according to the preset step size.
  • the NHR reference value is adjusted upward to improve the number of retransmissions of the actual data packet, so as to improve HARQ retransmits the combined gain, which improves transmission efficiency and transmission reliability.
  • the second load threshold can be used to distinguish the light load. When the load is light, the NHR reference value is adjusted downward to reduce the number of retransmissions of the actual data packet, thereby reducing transmission delay. Improve transmission efficiency.
  • FIG. 3 is a schematic flow chart of a method for adjusting an NHR reference value according to another embodiment of the present invention.
  • a method for adjusting the current NHR reference value according to the step size is used, and two load thresholds are set, including a high load threshold and a low load threshold.
  • the high load threshold corresponds to the first load threshold
  • the low load threshold corresponds to the second load threshold.
  • the method may include:
  • [45] 301 Receive an average load of each cell in the period reported by the BS in each measurement period.
  • the measurement period of the average load of the cell may be set in advance, and the average load of each cell in the period reported by the BS is received in each measurement period.
  • [47] 302 Determine whether the average load of at least one cell in the active set exceeds a high load threshold, and if yes, execute 303, otherwise execute 305.
  • the upper limit of the NHR reference value is the maximum value of the number of retransmissions set in advance.
  • [50] 304 Adjust the current NHR reference value upwards according to the preset step size.
  • the method of adjusting upward is: selecting the smaller of the following as the adjusted NHR Reference value: upper limit of NHR reference value, current NHR reference value plus the preset adjustment step size
  • Adjusted NHR reference value min (NHR reference value + adjustment step size, upper limit value of NHR reference value).
  • [53] 305 Determine whether the average load of all cells in the active set is lower than the low load threshold, and if yes, execute 306, otherwise, the process ends.
  • the lower limit value of the NHR reference value is the minimum value of the number of retransmissions set in advance.
  • the method of downward adjustment is: select the larger of the following as the adjusted NHR reference value: the lower limit value of the NHR reference value, the current NHR reference value minus the preset adjustment
  • the difference in step size can be expressed by the following formula:
  • Adjusted NHR reference value max (NHR reference value - adjustment step size, lower limit value of NHR reference value).
  • the upper limit value of the upward adjustment that is, the upper limit value of the NHR reference value
  • the lower limit value of the downward adjustment that is, the lower limit value of the NHR reference value
  • the current NHR reference value may be directly added to the sum of the preset adjustment step sizes, or the current NHR reference value may be subtracted from the preset adjustment step size as the adjusted NHR reference value.
  • the comparison between the average load of the cell and the comparison of the high and low loads may be performed, that is, whether the average load of all the cells in the active set is lower than the low load threshold, and the step 306 is performed according to the determination result.
  • the operation of 307 it is determined that the average load of at least one cell in the active set exceeds the high load threshold, and the operations as described in steps 303 and 304 above are performed according to the determination result.
  • the load is heavier and the load is lighter, and the current NHR reference is adjusted according to the preset step size.
  • the value so that when the average load of the cell is too low, the transmission delay can be reduced by gradually reducing the actual number of retransmissions of the data packet, and the transmission efficiency is improved, and when the average load of the cell is too high, the data packet can be gradually increased.
  • the actual number of retransmissions increases transmission reliability and ultimately increases system capacity.
  • the current NHR is adjusted according to the upper limit value of the preset NHR reference value and the lower limit value of the NHR reference value.
  • the reference value method, and two load thresholds are set, including a high load threshold and a low load threshold.
  • the high load threshold corresponds to the first load threshold
  • the low load threshold corresponds to the second load threshold.
  • the method may include:
  • [63] 402 Determine whether the current NHR reference value is the lower limit value of the set NHR reference value. If yes, execute 4 03, otherwise, execute 405.
  • [65] 404 Adjust the current NHR reference value to the upper limit of the set NHR reference value.
  • the upper limit of the preset NHR reference value is used as the adjusted NHR reference value to end the flow.
  • [67] 405 Determine whether the current NHR reference value is the upper limit value of the NHR reference value. If yes, execute 406, no Bay I", and end the process.
  • the lower limit of the NHR reference value is used as the adjusted NHR reference value.
  • the load is heavier and the load is lighter.
  • the current NHR reference value is adjusted according to the upper and lower limits of the preset NHR reference value, so that the cell If the average load is too low, the transmission delay can be reduced by reducing the actual number of retransmissions of the data packet.
  • the transmission reliability can be improved by increasing the actual number of retransmissions of the data packet.
  • the average load of the cell is first compared with the high load threshold as an example.
  • the average load of the cell may be compared with the low load threshold first, and then with the high load threshold.
  • the comparison between the average load of the cell and the high load threshold, and the comparison between the average load of the cell and the low load threshold are not sequential, which is not limited by the embodiment of the present invention.
  • the system includes: an adjustment device 520 and at least one BS 510.
  • the BS 510 is configured to report the average load of the cell.
  • the adjusting device 520 is configured to compare the average load of the cell reported by the BS 510 with a preset load threshold, and adjust the current NHR reference value according to the comparison result.
  • the adjustment means may be SRNC; or the adjustment means may be integrated into other physical entities on the network side.
  • the adjusting device 520 may include: a comparing module 521 and an adjusting module 522.
  • the comparison module 521 is configured to compare the average load of the cell with a preset low load threshold; [78] The adjustment module 522 is configured to adjust the current NHR reference value according to the comparison result obtained by the comparison module 521.
  • the comparison module 521 may include: a first threshold comparison unit 524 and/or a second threshold comparison unit 523.
  • the first threshold comparison unit 524 is configured to compare an average load of each cell in the active set with a preset first load threshold, and an average load of the at least one cell in the active set is higher than the first The load threshold, such as the high load threshold, results in a comparison that exceeds the first load threshold.
  • the second threshold comparison unit 523 is configured to compare the average load of the cell with a preset second load threshold, and the average load of all the cells in the active set or the set ratio is lower than the first A second load threshold, such as a low load threshold, results in a comparison below the second load threshold.
  • the adjustment module 522 can include: an upward adjustment unit 526 and a downward adjustment unit 525.
  • the upward adjustment unit 526 is configured to adjust the NHR reference value upwards when the comparison result obtained by the comparison module 521 is that the average load exceeds the high load threshold.
  • the upward adjustment unit 526 is configured to: when the comparison result obtained by the comparison module 521 is that the average load exceeds the high load threshold, adjust the current NHR reference value to an upper limit value of the preset NHR reference value; or Adjusting the current NHR reference value upwards according to a preset adjustment step; or, adjusting the NHR reference value to a preset NHR reference value after the NHR reference value is a lower limit value of the preset NHR reference value The upper limit value; or, if the NHR reference value is less than the upper limit value of the preset NHR reference value, the current NHR reference value is adjusted upward according to the preset adjustment step size.
  • the down adjustment unit 525 is configured to compare the NHR reference value downwardly when the comparison result obtained by the comparison module 521 is that the average load is lower than the low load threshold.
  • the downward adjustment unit 525 is configured to adjust the current NHR reference value to a lower limit value of the preset NHR reference value when the comparison result obtained by the comparison module 521 is that the average load is lower than the low load threshold. Or adjusting the current NHR reference value downward according to the preset adjustment step size, or adjusting the NHR reference value to a preset NHR after the NHR reference value is a preset upper limit value of the NHR reference value The lower limit value of the reference value, or, after the NHR reference value is greater than a lower limit value of the preset NHR reference value, the current NHR reference value is adjusted downward according to a preset adjustment step size.
  • the adjustment module 522 can only include the upward adjustment unit 526, and does not include the downward adjustment unit 525;
  • the adjustment module 522 may include only the downward adjustment unit 525, and does not include the upward adjustment unit 526.
  • An embodiment of the present invention further provides an adjusting apparatus, configured to compare an average load of each cell in the active set with a preset load threshold, and adjust a current NHR reference value according to the comparison result.
  • the adjusting device receives the average load of the cell reported by the base station, compares it with a preset load threshold, and adjusts the current NHR reference value according to the comparison result.
  • the adjustment device may be an SRNC; or the adjustment device may be integrated into other physical entities on the network side.
  • the specific structure of the adjusting device described in this embodiment may be the same as that of the adjusting device described in the above embodiments, and will not be further described herein.
  • the readable storage medium is, for example, a read only memory (ROM), a random access memory (abbreviated as RAM), a magnetic disk, an optical disk, or the like.

Abstract

本发明实施例中公开了一种调整NHR参考值的方法,用于确定在服务质量控制中使用的平均重传次数(NHR)参考值,该方法包括:将小区的平均负载与预先设置的负载门限值作比较;根据比较结果,调整当前NHR参考值。本发明实施例中还公开了一种调整NHR参考值的系统,该系统包括:基站(BS)和调整实体。本发明实施例另外公开了一种调整NHR参考值的装置,应用本发明能够动态调整NHR参考值。

Description

调整 NHR参考值的方法、 系统和装置
[1] 本申请要求于 2007年 12月 12日提交中国专利局、 申请号为 200710198759.5、 发 明名称为"调整 NHR参考值的方法、 系统和装置"的中国专利申请的优先权, 其 全部内容通过引用结合在本申请中。
[2] 技术领域
[3] 本发明涉及通信领域, 特别涉及一种调整混合自动重传 (HARQ, Hybrid
Automatic Repeat Request) 的重传次数 (NHR, Number of HARQ
Retransmission) 参考值的方法、 系统和装置。
[4] 发明背景
[5] 高速上行分组接入 (HSUPA, High Speed Uplink Packet
Access) 技术是宽带码分多址接入 (WCDMA, Wideband Code Division Multiple Access) 系统中上行高速数据解决方案, 通过釆用包括 10ms/2ms的短帧、 在物理 层釆用 HARQ协议及在基站 (NodeB) 实现对用户设备 (UE, User
Equipment) 的快速调度等一系列关键技术, 实现了 WCDMA系统上行的高速数 据传输。
[6] 其中,
HARQ协议是 ARQ协议的改进, 可以在一次数据传输失败吋要求重传的一种传输 机制的 ARQ系统中增加数据包冗余信息。 HARQ机制的形式很多, 比如, 可以釆 用与 ARQ相同的机制, 即在一个数据包接收吋不能正确解码情况下, 直接将其 丢弃, 并在上行信道中返回一个数据包重传请求, 请求重传原来的数据; 也可 以不丢弃接收错误的数据包, 再请求重传携带冗余信息的数据包, 以便与前一 个数据包合并解码, 得到正确的数据包。 因而在 HARQ协议下, 接收到正确数据 包之前, 可能需要传输多次, 而一个数据包 HARQ的 NHR则能够反映出系统的服 务质量 (QoS, Quality of
Service) , 一般来讲, 重传次数越少, 传输效率越高, QoS越好。
[7] 对 HSUPA业务的 QoS控制, 一般釆用外环功控(OLPC, Outer Loop Power Control)的方法, OLPC指的是 SRNC动态地调整内环功控的信噪比 (SIR, Signal interference
Rate) 目标值, 其目的是使得 UE保持一定的平均 NHR, 也就是说, 使数据包的 重传次数满足 QoS要求。
[8] 在实现本发明的过程中, 发明人发现现有技术中至少存在如下问题: 目前对于
HSUPA业务 QoS的控制过程, 由于用于 QoS控制的 NHR参考值是为满足用户的 Q oS要求而设定的一个固定值, 因此, 目前的 QoS控制无法综合考虑系统的负载问 题, 比如, 当负载较轻的吋候, 如果 NHR参考值配置较大, 则业务不能够达到 极限速率; 当负载较重的吋候, 如果 NHR参考值配置较小, 则浪费了小区的容
[9] 发明内容
[10] 有鉴于此, 本发明实施例提供一种调整 NHR参考值的方法、 系统及装置。
[11] 一方面, 本发明实施例提供一种调整 NHR参考值的方法, 用于确定在服务质量 控制中使用的平均重传次数 NHR参考值, 该方法包括:
[12] 将激活集内各小区的平均负载与预先设置的负载门限值作比较;
[13] 根据比较结果, 调整当前 NHR参考值。
[14] 另一方面, 本发明实施例提供一种调整 NHR参考值的装置, 所述装置包括: [15] 比较模块, 用于将小区的平均负载与预先设置的负载门限值作比较;
[16] 调整模块, 用于根据所述比较模块得到的比较结果, 调整当前 NHR参考值。
[17] 又一方面, 本发明实施例提供一种调整 NHR参考值的系统, 所述系统包括: [18] 至少一个基站, 用于上报小区的平均负载;
[19] 调整装置, 用于将所述小区的平均负载与预先设置的负载门限值作比较并根据 比较结果, 调整当前 NHR参考值。
[20] 本发明实施例提供的调整 NHR参考值的方法、 装置和系统, 根据小区平均负载 对 NHR参考值进行调整, 因而能够动态调整 NHR参考值, 从而能够在小区负载 轻吋, 通过向下调整 QoS控制使用的 NHR参考值, 或者在负载重吋通过适当提高
NHR参考值。
[21] 附图简要说明 [22] 图 1为本发明实施例中 HSUPA的协议结构示意图;
[23] 图 2为本发明一个实施例中调整 NHR参考值的方法流程示意图;
[24] 图 3为本发明另一个实施例中调整 NHR参考值的方法流程示意图;
[25] 图 4为本发明又一个实施例中调整 NHR参考值的方法流程示意图;
[26] 图 5为本发明一个实施例中釆用的调整 NHR参考值的系统结构示意图。
[27] 实施本发明的方式
[28] 为使本发明实施例的技术方案及优点更加清楚明白, 以下参照附图对本发明实 施例作进一步详细说明。
[29] 在 HSUPA的协议结构中, QoS控制是由服务无线网络控制器 (SRNC, Serving
Radio Network
Controller) 实现的, 图 1为本发明实施例中 HSUPA的协议结构示意图, 如图 1所 示, HSUPA的协议结构主要包括 UE、 NodeB s 漂移无线网络控制器 (DRNC, D rift Radio Network
Controller) 和 SRNC等实体, 其中, UE与 NodeB通过 Uu接口连接; DRNC与 Nod eB通过 Iub接口连接,
SRNC和 DRNC能通过 Iur接口交互信息, 该 Iur接口可以是无线网络控制器 (RNC , Radio Network
Controller) 之间物理的直接相连或通过适当的传输网络实现。 SRNC负责核心网 和用户之间的数据传送和 Iu接口信令的转送和接收、 负责进行包括服务质量控制 的无线资源控制、 负责对空中接口的数据进行 L2层的处理, 也就是, 媒体接入 控制 (MAC, Medium Access Control) 与无线链路控制 (RLC, Radio Link Control) 层的处理, 并执行基本无线资源管理操作, 如切换判决、 外环功率控 制和无线接入承载 (RAB, Radio Access
Bearer) 的参数向空口传输信道参数的转化等。
[30] 如图 1所示,
MAC-d表示处理分配给一个 UE的专用逻辑信道和专用传输信道的 MAC实体, 每 个 UE具有一个 MAC-d。 对应每一个 UE的 MAC-d, UTRAN都有一个相应的 MAC- d与之对应; MAC-es、 MAC-e实体是 WCDMA系统引入 HSUPA以后, 增加的 MA C层实体。 其中为了支持 NodeB的快速调度, UTRAN侧的 MAC-e实体下移到了 N odeB; 为了支持 HSUPA的宏分集, MAC-es位于 SRNC。
[31] 本发明实施例提供了调整 NHR参考值的方法, 本发明实施例中调整 NHR参考值 的方法是: 将激活集内各小区的平均负载与预先设置的负载门限值作比较; 根 据比较结果, 调整当前 NHR参考值。
[32] 图 2为本发明一个实施例中釆用的调整 NHR参考值的方法流程示意图。 如图 2所 示, 该方法可以包括:
[33] 201: 获取小区的平均负载。
[34] 此处, 激活集内各个小区的平均负载可以从各个小区的基站上报的测量报告中 获得, 也可以从无线控制器的数据库中提取出小区的平均负载。 各个小区的基 站可以通过周期或不定期测量小区的实际负载, 求平均值后, 得到该小区的平 均负载。 本实施例中一个激活集内小区的个数可以是一个也可以是多个。
[35] 202: 将小区的平均负载与预先设置的负载门限值作比较。
[36] 此处, 预先设置的负载门限值可以有一个也可以有两个。 在有两个负载门限值 吋, 可以分别表示为第一负载门限值和第二负载门限值, 此处, 设置的第一负 载门限值对应于负载较重的情况, 比如, 小区平均负载达到 80% , 也就是说, 接 入的终端较多, 实际使用的容量占总容量的 80% , 第二负载门限值对应于负载较 轻的情况, 比如小区平均负载达到 20%。
[37] 如果只预先设置了第一负载门限值, 其中第一负载门限值对应于负载较重的情 况, 在激活集中的至少一个小区超过第一负载门限值吋, 则得到小区的平均负 载超出第一负载门限值的比较结果, 这吋, 可以向上调整 NHR参考值, 否则, 不进行调整。
[38] 如果只预先设置了第二负载门限值, 其中第二负载门限值对应于负载较轻的情 况, 在激活集中的所有小区或者达到设定比例的小区均低于第二负载门限值吋 , 则得到小区的平均负载低于第二负载门限值的比较结果, 这吋, 可以向下调 整 NHR参考值, 否则, 不进行调整。 这里, 激活集指的是和某一个 UE建立通讯 业务的所有无线链路的集合, 针对该 UE—条无线链路对应一特定小区。
[39] 如果既设置了第一负载门限值又设置了第二负载门限值, 则既需要比较在激活 集中是否所有小区或设定比例小区的平均负载均低于第二负载门限值, 还要比 较在激活集中是否有至少一个小区超过第一负载门限值。
[40] 203: 根据比较结果, 调整 NHR参考值。
[41] 当比较结果为小区的平均负载超出第一负载门限值吋, 向上调整当前 NHR参考 值, 比如, 可以将当前 NHR参考值调整为预先设置的 NHR参考值的上限值, 或 者根据预先设置的步长, 向上调整当前 NHR参考值。
[42] 当比较结果为小区的平均负载低于第二负载门限值吋, 向下调整当前的 NHR参 考值, 比如, 可以将当前 NHR参考值调整为预先设置的 NHR参考值的下限值, 或者根据预先设置的步长, 向下调整当前的 NHR参考值。
[43] 本实施例中, 通过釆用第一负载门限值区分出负载较重的情况, 在负载较重吋 , 通过向上调整 NHR参考值, 来提高实际数据包的重传次数, 以提高 HARQ的重 传合并增益, 从而能够提高传输效率和传输可靠性。 并且, 可以通过釆用第二 负载门限值区分出负载较轻的情况, 在负载较轻吋, 通过向下调整 NHR参考值 , 来降低实际数据包的重传次数, 能够减少传输吋延, 提高传输效率。
[44] 图 3为本发明另一个实施例中调整 NHR参考值的方法流程示意图。 本实施例釆 用了根据步长调整当前 NHR参考值的方法, 并且设置了两个负载门限, 包括一 个高负载门限值和一个低负载门限值。 其中, 高负载门限值对应第一负载门限 值, 低负载门限值对应第二负载门限值, 如图 3所示, 该方法可以包括:
[45] 301: 在每一个测量周期, 接收 BS上报的该周期内各个小区的平均负载。
[46] 本实施例中, 可以预先设置对小区平均负载的测量周期, 在每一个测量周期内 , 接收 BS上报的该周期内各个小区的平均负载。
[47] 302: 判断激活集内是否至少有一个小区的平均负载超过高负载门限, 如果是 , 执行 303, 否则执行 305。
[48] 303: 判断当前 NHR参考值是否小于 NHR参考值的上限值, 如果是, 执行 304, 否则执行 305。
[49] 本实施例中, NHR参考值的上限值为预先设置的重传次数的最大值。
[50] 304: 根据预先设置的步长, 向上调整当前 NHR参考值。
[51] 本实施例中, 向上调整的方法是: 选取以下二者中的较小者作为调整后的 NHR 参考值: NHR参考值的上限值、 当前 NHR参考值加上预先设置的调整步长之和
, 可釆用如下公式表示:
[52] 调整后的 NHR参考值 =min (NHR参考值 +调整步长, NHR参考值的上限值) 。
[53] 305: 判断激活集内是否所有小区的平均负载均低于低负载门限, 如果是, 执 行 306, 否则, 结束流程。
[54] 306: 判断当前 NHR参考值是否大于 NHR参考值的下限值, 如果是, 执行 307, 否则, 结束流程。
[55] 本实施例中, NHR参考值的下限值为预先设置的重传次数的最小值。
[56] 307: 根据预先设置的步长, 向下调整当前 NHR参考值。
[57] 本实施例中, 向下调整的方法是: 选取以下二者中的较大者作为调整后的 NHR 参考值: NHR参考值的下限值、 当前 NHR参考值减掉预先设置的调整步长之差 , 可釆用如下公式表示:
[58] 调整后的 NHR参考值 =max (NHR参考值 -调整步长, NHR参考值的下限值) 。
[59] 本实施例中给出了向上调整的上限值即 NHR参考值的上限值, 以及向下调整的 下限值即 NHR参考值的下限值。 当然也可以直接将当前 NHR参考值加上预先设 置的调整步长之和, 或者将当前 NHR参考值减掉预先设置的调整步长之差作为 调整后的 NHR参考值。 本实施例中也可以将小区的平均负载与高低负载的比较 顺序调换执行, 也就是先判断激活集内是否所有小区的平均负载均低于低负载 门限, 根据判断结果执行如上述步骤 306、 步骤 307所述的操作, 再判断判断激 活集内是否至少有一个小区的平均负载超过高负载门限, 根据判断结果再执行 如上述步骤 303、 步骤 304所述的操作。
[60] 本实施例根据小区的平均负载、 以及第一负载门限值和第二负载门限值来区分 负载较重和负载较轻的情况, 并根据预先设置的步长, 调整当前 NHR参考值, 从而当小区的平均负载过低吋, 能够通过逐步减少数据包的实际重传次数来减 少传输吋延, 提高传输效率, 而当小区的平均负载过高吋, 能够通过逐步增加 数据包的实际重传次数来提高传输可靠性, 最终提高系统容量。
[61] 图 4为本发明又一个实施例中调整 NHR参考值的方法流程示意图。 本实施例釆 用根据预先设置的 NHR参考值的上限值和 NHR参考值的下限值来调整当前 NHR 参考值的方法, 并且设置了了两个负载门限, 包括一个高负载门限值和一个低 负载门限值。 其中, 高负载门限值对应第一负载门限值, 低负载门限值对应第 二负载门限值, 如图 4所示, 该方法可以包括:
[62] 401: 从数据库中提取各个小区的平均负载。
[63] 402: 判断当前 NHR参考值是否为设置的 NHR参考值的下限值, 如果是, 执行 4 03, 否则, 执行 405。
[64] 403: 判断激活集内是否至少有一个小区的平均负载超过高负载门限, 如果是
, 执行 404, 否则, 结束流程。
[65] 404: 调整当前 NHR参考值为设置的 NHR参考值的上限值。
[66] 本步骤中, 将预先设置的 NHR参考值的上限值作为调整后的 NHR参考值, 结束 流程。
[67] 405: 判断当前 NHR参考值是否为 NHR参考值的上限值, 如果是, 执行 406, 否 贝 I」, 结束流程。
[68] 406: 判断激活集内是否所有小区的平均负载均低于低负载门限, 如果是, 执 行 407, 否则, 结束流程。
[69] 407: 调整当前 NHR参考值为 NHR参考值的下限值。
[70] 本步骤中, 将 NHR参考值的下限值作为调整后的 NHR参考值。
[71] 本实施例根据小区的平均高、 低负载门限来区分负载较重和负载较轻的情况, 根据预先设置的 NHR参考值的上、 下限值, 调整当前 NHR参考值, 从而当小区 的平均负载过低吋, 能够通过减少数据包的实际重传次数来减少传输吋延, 而 当小区的平均负载过高吋, 能够通过增加数据包的实际重传次数来提高传输可 靠性。
[72] 上述实施例中以小区的平均负载先与高负载门限比较为例进行说明, 作为一种 可选的方案, 也可以用小区的平均负载先与低负载门限比较, 再与高负载门限 进行比较, 也就是小区的平均负载与高负载门限的比较, 以及小区的平均负载 和低负载门限的比较这两个过程无先后顺序, 本发明实施例对此不做限定。
[73] 图 5为本发明实施例中釆用的调整 NHR参考值的系统结构示意图。 如图 5所示, 该系统包括: 调整装置 520和至少一个 BS510。 [74] 具体地, BS510用于上报小区的平均负载。
[75] 调整装置 520用于将 BS510上报的小区的平均负载与预先设置的负载门限值作比 较, 并根据比较结果调整当前 NHR参考值。 这里, 调整装置可以为 SRNC; 或者 调整装置可以集成到网络侧的其它物理实体中。
[76] 其中, 调整装置 520可以包括:比较模块 521和调整模块 522。
[77] 比较模块 521, 用于将小区的平均负载与预先设置的低负载门限值作比较; [78] 调整模块 522, 用于根据比较模块 521得到的比较结果调整当前 NHR参考值。
[79] 进一步地, 比较模块 521可以包括: 第一门限比较单元 524和 /或第二门限比较 单元 523。
[80] 其中第一门限比较单元 524, 用于将激活集内各小区的平均负载与预先设置的 第一负载门限值作比较, 在激活集内的至少一个小区的平均负载高于第一负载 门限值例如高负载门限吋, 得到超出第一负载门限的比较结果。
[81] 第二门限比较单元 523, 用于将小区的平均负载与预先设置的第二负载门限值 作比较, 在激活集内的所有的小区或设定比例的小区的平均负载低于第二负载 门限值例如低负载门限吋, 得到低于第二负载门限的比较结果。
[82] 进一步地, 调整模块 522可以包括: 向上调整单元 526和向下调整单元 525。
[83] 向上调整单元 526, 用于在比较模块 521得到的比较结果为平均负载超出高负载 门限吋, 向上调整 NHR参考值。
[84] 具体地, 向上调整单元 526, 用于在比较模块 521得到的比较结果为平均负载超 出高负载门限吋, 将当前 NHR参考值调整为预先设置的 NHR参考值的上限值; 或者根据预先设置的调整步长, 向上调整当前 NHR参考值; 或者, 在所述 NHR 参考值为预先设置的 NHR参考值的下限值吋, 将所述 NHR参考值调整为预先设 置的 NHR参考值的上限值; 或者, 在所述 NHR参考值小于预先设置的 NHR参考 值的上限值吋, 根据预先设置的调整步长, 向上调整所述当前 NHR参考值。
[85] 向下调整单元 525, 用于在比较模块 521得到的比较结果为平均负载低于低负载 门限吋, 向下调整 NHR参考值。
[86] 具体地, 向下调整单元 525, 用于在比较模块 521得到的比较结果为平均负载低 于低负载门限吋, 将当前 NHR参考值调整为预先设置的 NHR参考值的下限值, 或者根据预先设置的调整步长, 向下调整当前 NHR参考值, 或者, 在所述 NHR 参考值为预先设置的 NHR参考值的上限值吋, 将所述 NHR参考值调整为预先设 置的 NHR参考值的下限值, 或者, 在所述 NHR参考值大于预先设置的 NHR参考 值的下限值吋, 根据预先设置的调整步长, 向下调整所述当前 NHR参考值。
[87] 可以理解, 当比较模块 521只包括第一门限比较单元 524, 而不包括第二门限比 较单元 523吋, 调整模块 522可以只包括向上调整单元 526, 而不包括向下调整单 元 525; 当比较模块 521只包括第二门限比较单元 524, 而不包括第一门限比较单 元 523吋, 调整模块 522可以只包括向下调整单元 525, 而不包括向上调整单元 52 6。
[88] 本发明实施例还提供一种调整装置, 用于将激活集内各小区的平均负载与预先 设置的负载门限值作比较, 并根据比较结果调整当前 NHR参考值。 例如该调整 装置接收基站上报的小区的平均负载, 并与预先设置的负载门限值作比较, 以 及根据比较结果调整当前 NHR参考值。 在具体实现吋, 调整装置可以为 SRNC; 或者调整装置可以集成到网络侧的其它物理实体中。 本实施例所述的调整装置 具体结构可以如上面实施例中所述的调整装置的结构, 此处不再赞述。
[89] 本领域普通技术人员可以理解, 实现上述实施例方法中的全部或部分步骤是可 以通过程序来指令相关的硬件完成, 所述的程序可以存储于一计算机可读存储 介质中。 该可读存储介质例如只读存储器 (简称 ROM) 、 随机存取存储器 (简 称 RAM) 、 磁盘、 光盘等。
[90] 以上所述仅为本发明的较佳实施例而已, 并非用于限定本发明的保护范围。 凡 在本发明的精神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

权利要求书
[1] 一种调整混合自动重传次数 NHR参考值的方法, 其特征在于, 该方法包括 将激活集内各小区的平均负载与预先设置的负载门限值作比较; 根据比较结果, 调整当前 NHR参考值。
[2] 根据权利要求 1所述的方法, 其特征在于, 还包括: 获取小区的平均负载; 所述获取小区的平均负载包括: 接收各基站周期上报的小区平均负载或从 数据库中提取小区的平均负载。
[3] 根据权利要求 1所述的方法, 其特征在于, 所述将激活集内各小区的平均负 载与预先设置的负载门限值作比较包括:
将所述激活集内各小区的平均负载与第一负载门限值作比较, 如果所述激 活集内的至少一个小区的平均负载高于所述第一负载门限值, 则所述比较 结果为所述平均负载超出第一负载门限值;
所述根据比较结果, 调整当前 NHR参考值包括:
当所述比较结果为所述平均负载超出第一负载门限值吋, 上调所述 NHR参 考值。
[4] 根据权利要求 3所述的方法, 其特征在于, 所述上调所述 NHR参考值包括 将所述 NHR参考值调整为预先设置的 NHR参考值的上限值; 或者, 根据预先设置的调整步长上调所述当前 NHR参考值。
[5] 根据权利要求 1或 3所述的方法, 其特征在于, 所述将激活集内各小区的平 均负载与预先设置的负载门限值作比较包括:
将所述激活集内各小区的平均负载与第二负载门限值作比较, 如果所述激 活集内的所有小区或者达到设定比例的小区的平均负载都低于所述第二负 载门限值, 则所述比较结果为所述平均负载低于第二负载门限值; 所述根据比较结果, 调整当前 NHR参考值包括: 当所述比较结果为所述平 均负载低于第二负载门限吋, 下调所述 NHR参考值。
[6] 根据权利要求 5所述的方法, 其特征在于, 所述下调所述 NHR参考值包括 将所述 NHR参考值调整为预先设置的 NHR参考值的下限值, 或者, 根据预先设置的调整步长, 向下调整所述当前 NHR参考值。
[7] 一种调整 NHR参考值的装置, 其特征在于, 所述装置包括:
比较模块, 用于将激活集内各小区的平均负载与预先设置的负载门限值作 比较;
调整模块, 用于根据所述比较模块得到的比较结果, 调整当前 NHR参考值
[8] 根据权利要求 7所述的装置, 其特征在于, 所述比较模块包括:
第一门限比较单元, 用于将所述激活集内各小区的平均负载与预先设置的 第一负载门限值作比较, 在激活集内的至少一个小区的平均负载高于所述 第一负载门限值, 得到平均负载超出第一负载门限的比较结果; 和 /或, 第二门限比较单元, 用于将所述小区的平均负载与预先设置的第二负载门 限值作比较, 在激活集内的所有小区或者达到设定比例的小区的平均负载 都低于所述第二负载门限值吋, 得到平均负载低于第二负载门限的比较结 果。
[9] 根据权利要求 7所述的装置, 其特征在于, 所述调整模块包括:
向上调整单元, 用于在所述比较模块得到的比较结果为平均负载超出第一 负载门限吋, 向上调整所述当前 NHR参考值; 和 /或
向下调整单元, 用于在所述比较模块得到的比较结果为平均负载低于第二 负载门限吋, 向下调整所述当前 NHR参考值。
[10] 如权利要求 7所述的装置, 其特征在于, 所述装置为服务无线网络控制器 S
Figure imgf000013_0001
[11] 一种调整 NHR参考值的系统, 其特征在于, 所述系统包括:
至少一个基站, 用于上报小区的平均负载;
调整装置, 用于将所述小区的平均负载与预先设置的负载门限值作比较并 根据比较结果, 调整当前 NHR参考值。
[12] 根据权利要求 11所述的系统, 其特征在于, 所述装置包括: 比较模块, 用于将小区的平均负载与预先设置的负载门限值作比较; 调整模块, 用于根据所述比较模块得到的比较结果, 调整当前 NHR参考值
[13] 根据权利要求 12所述的系统, 其特征在于, 所述比较模块包括:
第一门限比较单元, 用于将所述激活集内各小区的平均负载与预先设置的 第一负载门限值作比较, 在激活集内的至少一个小区的平均负载高于所述 第一负载门限值, 得到超出第一负载门限的比较结果; 和 /或, 第二门限比较单元, 用于将所述小区的平均负载与预先设置的第二负载门 限值作比较, 在激活集内的所有小区或者达到设定比例的小区的平均负载 都低于所述第二负载门限值吋, 得到低于第二负载门限的比较结果。
[14] 根据权利要求 12所述的系统, 其特征在于, 所述调整模块包括:
向上调整单元, 用于在所述比较模块得到的比较结果为平均负载超出高负 载门限吋, 向上调整所述当前 NHR参考值;
向下调整单元, 用于在所述比较模块得到的比较结果为平均负载低于低负 载门限吋, 向下调整所述当前 NHR参考值。
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