WO2011157023A1 - 调制编码方式的更新方法及基站 - Google Patents

调制编码方式的更新方法及基站 Download PDF

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Publication number
WO2011157023A1
WO2011157023A1 PCT/CN2010/077965 CN2010077965W WO2011157023A1 WO 2011157023 A1 WO2011157023 A1 WO 2011157023A1 CN 2010077965 W CN2010077965 W CN 2010077965W WO 2011157023 A1 WO2011157023 A1 WO 2011157023A1
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Prior art keywords
error rate
base station
modulation
terminal
coding mode
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PCT/CN2010/077965
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English (en)
French (fr)
Inventor
郭强
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中兴通讯股份有限公司
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Publication of WO2011157023A1 publication Critical patent/WO2011157023A1/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
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026Transmission of channel quality indication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/20Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H04L1/203Details of error rate determination, e.g. BER, FER or WER

Definitions

  • FIG. 1 is a network architecture diagram terminal, an access network, and a connection service network according to the related technology of Worldwide Interoperability for Microwave Access (WIMAX).
  • WIMAX Worldwide Interoperability for Microwave Access
  • R1 consists of an air interface protocol between the terminal and the access network, and R1 may include an associated management plane protocol.
  • R2 consists of a protocol between the terminal and the connection network, including authentication, service authorization, and Internet Protocol (IP) host configuration management. This reference point is logical. It does not mean that there is a direct protocol interface between the mobile station (MS) and the connection service network. The authentication between the two is determined by the home network service provider (Network Service). Provider, referred to as NSP) is responsible. R2 can support IP host configuration management between the terminal and the connection network.
  • R3 consists of a set of control planes between a group of access networks and a connection service network to support authentication (Authentication, Authorization and Accounting, AAA for short), policy enforcement and mobility management. It also includes The method of carrying the face (such as a tunnel) transfers data between the access network and the connected network.
  • R4 consists of a set of control planes and 7 bearer protocols. These protocols start/terminate in different functional entities of the access network to support the mobility of the terminals between access networks. R4 is similar or different access. Common reference point between nets.
  • R5 consists of a set of control plane protocols and bearer plane protocols. The interworking between the home NSP and the visited NSP is completed.
  • AMC algorithms in communication technologies are generally based on channel quality information, that is, modulation and coding rate changes and hopping are dependent on channel quality information.
  • the terminal device reports the current channel quality information to the base station, and the base station determines, according to the channel quality information, whether the terminal can demodulate in a high-order modulation and coding mode at a predetermined error rate under the current signal quality. Receive signal, if not, force the terminal to use low-order modulation and coding, thus ensuring The terminal normally receives the data.
  • the current channel quality information reported by the terminal equipment of the same location to the base station should be the same.
  • there are differences between vendors of different terminal devices which result in different channel quality information reported by terminal devices of different vendors in the same location, thereby causing the base station to indicate the modulation and coding mode used by the terminal device according to the channel quality information. the same.
  • the present invention has been made in view of the problem that a terminal uses an AMC demodulation signal based on channel quality information to cause a decrease in overall network throughput, and a main object of the present invention is to provide a method for updating a modulation and coding method. Base station to solve the above problem.
  • an update method of a modulation coding method is provided.
  • the method for updating the modulation and coding scheme according to the present invention includes: the base station acquires a bit error rate; and updates the modulation and coding scheme according to the bit error rate.
  • the error rate includes a downlink error rate.
  • the base station acquires the downlink error rate.
  • the base station reports the downlink error rate reported by the terminal that accesses the terminal by reporting the REP-REQ message.
  • the base station receives the downlink error rate from the terminal.
  • the REP-REQ message further carries a measurement rule for the terminal to measure the bit error rate and an upper rule for the downlink error rate of the terminal.
  • carrying the upper rule in the REP-REQ message includes: adding a field for notifying the terminal to report the period of the downlink error rate in the REP-REQ message.
  • the method further includes: the terminal reporting the downlink error rate by using the REP-RPS message, wherein the terminal adds a downlink error rate in the REP-RSP message.
  • the error rate includes an uplink error rate; the base station acquiring the uplink error rate includes: the base station measures the uplink error rate.
  • the method further includes: when the terminal accesses the base station, the base station establishes a service flow with the terminal; and the base station configures the error rate lower limit value and the error rate upper limit value for the service flow.
  • the update modulation coding method includes: if the error rate is lower than the error rate lower limit, the modulation coding mode is updated to a higher order modulation coding mode; if the error rate is at the bit error rate The modulation coding mode is not updated between the limit value and the error rate upper limit value; if the bit error rate is higher than the error rate upper limit value, the modulation coding mode of the modulation coding mode is updated.
  • a base station includes: an obtaining module, configured to acquire a bit error rate; and an updating module, configured to update the modulation and coding mode according to the bit error rate. Further, the obtaining module includes: an indication submodule, configured to indicate, by using a REP-REQ message, a terminal that accesses the terminal to report a downlink error rate; a receiving submodule, configured to receive a downlink error rate from the terminal; and a measurement submodule, For measuring the uplink error rate.
  • the updating module includes: a first update submodule, configured to: when the bit error rate is lower than the bit error rate lower limit value, update the modulation and coding mode to a higher order modulation and coding mode; and the second update submodule is configured to When the bit error rate is higher than the bit error rate upper limit value, the modulation coding mode is updated to the modulation coding mode of the order.
  • the base station uses the acquired error rate to update the modulation and coding mode, and solves the problem that the terminal uses the AMC demodulated signal based on the channel quality information in the related art, thereby causing the entire network throughput to decrease, thereby improving as much as possible. The throughput of the entire network.
  • FIG. 1 is a network architecture diagram of a WIMAX according to the related art
  • FIG. 2 is a flowchart of a method for updating a modulation and coding scheme according to an embodiment of the present invention
  • FIG. 3 is a modulation and coding scheme according to a preferred embodiment of the present invention
  • FIG. 4 is a flowchart of a method for updating a modulation and coding scheme according to a preferred embodiment 2 of the present invention
  • FIG. 5 is a flowchart of an update method for a modulation and coding scheme according to a preferred embodiment 3 of the present invention
  • FIG. 6 is a structural block diagram of a base station according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. According to an embodiment of the present invention, an update method of a modulation and coding method is provided.
  • Step S202 the base station acquires a bit error rate.
  • Step S204 updating the modulation and coding mode according to the error rate.
  • the base station updates the modulation and coding mode according to the channel quality information.
  • the modulation coding mode is updated by the base station according to the error rate, so that the modulation and coding mode caused by the inaccuracy of the channel quality information acquired by the base station is not suitable, thereby improving the throughput of the entire network as much as possible.
  • the error rate includes a downlink error rate.
  • the base station acquires the downlink error rate.
  • the base station sends a report request (Report Request, REP-REQ for short) message to the terminal accessing the terminal to report the downlink error rate.
  • the downlink error rate of the terminal It should be noted that the downlink error rate can be accurately obtained by the terminal. Therefore, the preferred embodiment avoids the unsuitability of the modulation and coding mode due to inaccurate channel quality information in the related art.
  • the base station obtains the error rate of 4 ⁇ on the terminal, and updates the modulation and coding mode according to the error rate, so that the throughput of the entire network can be improved as much as possible.
  • the REP-REQ message further carries a measurement rule for the terminal to measure the bit error rate and an upper rule for the downlink error rate of the terminal.
  • a base station generally corresponds to multiple terminals. By setting the same measurement rule and reporting rule for these terminals, the error rate of measurement and reporting of these terminals can be standardized, thereby facilitating the base station to calculate the error rate according to the error rate.
  • Update the modulation coding method Preferably, carrying the upper rule in the REP-REQ message includes: adding a field in the REP-REQ message for notifying the period of the downlink error rate on the terminal. It should be noted that in the communication process between the base station and the terminal, the error rate usually does not change greatly frequently.
  • the type of the TLV of the REP-REQ can be increased in the REP-REQ message as shown in Table 1 below.
  • the terminal responds by obscuring
  • the downlink error rate is 4 ⁇ , where the terminal adds a field for indicating the downlink error rate in the REP - RSP message. It should be noted that, by standardizing the manner in which the terminal reports the error rate, the base station can be conveniently updated according to the error rate. Specifically, the TLV can be boosted in the REP - RSP message as shown in Table 2 below. Table 2 REP-RSP booster.
  • the error rate includes an uplink error rate; the base station acquiring the uplink error rate includes: the base station measures the uplink error rate.
  • the uplink error rate can be directly and accurately obtained by the base station. Therefore, the preferred embodiment avoids the unsuitability of the modulation and coding mode due to inaccurate channel quality information in the related art. Then, by adjusting the modulation and coding mode correspondingly to the error rate of the base station, the throughput of the entire network can be improved as much as possible.
  • the base station before the base station acquires the error rate, the base station establishes a service flow with the terminal in the process of the terminal accessing the base station; and the base station configures the error rate lower limit value and the error rate upper limit value for the service flow.
  • establishing a service flow may be configuring a corresponding QoS parameter, which may be used to determine a required bit error rate requirement between the base station and the terminal.
  • the bit error rate lower limit value and the bit error rate upper limit value may be used to compare whether the bit error rate exceeds an allowable range, which may be preset according to needs, or may be a base station according to users and operations.
  • the agreement signed by the merchant is calculated and pre-stored in the process of terminal access according to the corresponding service level.
  • the method of determining whether to update the modulation and coding mode is determined by the bit error rate lower limit value and the bit error rate upper limit value, and the implementation manner is simple and easy to implement.
  • the error code rate update modulation coding mode includes: if the error rate is lower than the error rate lower limit value, the modulation coding mode is updated to a higher order modulation coding mode; if the error rate is located at the bit error rate lower limit value And between the error rate upper limit value, the modulation coding mode is not updated; if the error rate is higher than the error rate upper limit value, the modulation coding mode is updated to the modulation coding mode.
  • the high-order modulation and coding method corresponds to a high error rate. Therefore, if the error rate is lower than the bit error rate lower limit, the bit error rate still has a rising space.
  • the modulation coding mode can be updated to a higher-order modulation coding mode under the requirement of the specified bit error rate, thereby improving the throughput of the entire network as much as possible.
  • the modulation coding method of the rank corresponds to the error rate of the Times. Therefore, if the error rate is higher than the upper limit of the error rate, the error rate must be lowered to meet the requirement of the specified error rate. Therefore, the update modulation coding mode is a low-order modulation coding mode, thereby ensuring compliance with a prescribed error rate requirement.
  • LTE Long-Term Evolution
  • the preferred embodiment 1 describes a process in which the terminal reports the error rate according to the indication of the base station after the terminal accesses the base station, and then the base station updates the modulation and coding mode according to the error rate.
  • FIG. 3 is a flowchart of a method for updating a modulation and coding mode according to a preferred embodiment of the present invention, including the following steps S302 to S310: Step S302, after the terminal searches for a network, attempts to access.
  • Step S304 indicating access signaling of the base station and the terminal, including basic capability negotiation, an authentication process, a registration process, and the like.
  • step S302 and step S304 are the same as the standard WIMAX access procedure.
  • Step S306 the base station requests the terminal to perform the error rate reporting by using the REP-REQ message.
  • Step S308 the terminal utilizes the error rate of 4 REP on the REP-RSP signaling by the request in the REP-REQ.
  • Step S310 the error rate of the base station of 4 ⁇ determines a new modulation and demodulation mode.
  • the preferred embodiment 2 describes in detail the process in which the terminal reports the downlink error rate according to the indication of the base station after the terminal accesses the base station, and then the base station updates the modulation and coding mode according to the downlink error rate.
  • Step S402 The base station receives an access message from the terminal.
  • Step S404 The base station acquires configuration information of the user from the AAA.
  • Step S406, the base station establishes a corresponding service flow according to the configuration information of the user. It should be noted that steps S402 to S406 are the same as the standard WIMAX access procedure.
  • Step S408 The service flow established by the base station configures a default error rate upper limit and a bit error rate lower limit for each service flow of the corresponding terminal.
  • Step S410 The base station instructs the terminal to perform measurement of the downlink error rate and the upper limit of the measurement result. It should be noted that the base station can notify the terminal to measure the downlink error rate by using the REP-REQ message, and the base station can also notify the terminal of the measurement rule and the reporting rule.
  • Step S412 The terminal starts the downlink measurement error rate according to the requirements of the base station, and statistics the error rate, and then reports according to the requirement. Specifically, the terminal uses the rule statistics set by the base station and uses the REP-RSP signaling to count the statistics.
  • Step S414, the base station determines whether to update the modulation and coding mode according to the error rate. The judgment principle is: Whether the bit error rate is between the above upper error rate and the lower error rate.
  • Step S416 updating the modulation and coding mode.
  • the modulation and coding method can be updated according to the following rules. If the bit error rate is greater than the set error rate upper limit, the modulation coding mode is changed to a higher order mode. If the bit error rate is smaller than the set modulation coding mode, the modulation coding mode is changed to a higher order mode. Step 4 gathers S418, and ends the update process of the modulation and coding mode. It should be noted that, in the related art, the base station requires the terminal to report the CINR or the terminal RI.
  • the terminal directly reports the error rate, which can avoid the modulation and coding mode caused by the channel quality information acquired by the base station. Not suitable, thus maximizing the throughput of the entire network.
  • Preferred Embodiment 3 This preferred embodiment 3 describes in detail the process in which the base station measures the uplink error rate after the terminal accesses the base station, and then updates the modulation and coding mode according to the uplink error rate.
  • FIG. 5 is a flowchart of a method for updating a modulation and coding scheme according to a preferred embodiment 3 of the present invention, including the following steps S502 to S516: Step S502: The base station receives an access message from the terminal. Step S504: The base station acquires configuration information of the user from the AAA.
  • Step S506 the base station establishes a corresponding service flow according to the configuration information of the user. It should be noted that steps S502 to S506 are the same as the standard WIMAX access procedure.
  • Step S508 the service flow established by the base station configures a default error rate upper limit and a bit error rate lower limit for each service flow of the corresponding terminal.
  • Step S 510 The base station measures an uplink error rate.
  • Step S512 the base station determines whether to update the modulation and coding mode according to the error rate. The judgment principle is: Whether the bit error rate is between the above upper error rate and the lower error rate.
  • Step S514 updating the modulation and coding mode.
  • the modulation and coding method can be updated according to the following rules. If the bit error rate is greater than the set error rate upper limit, the modulation coding mode is changed to a higher order mode. If the bit error rate is smaller than the set modulation coding mode, the modulation coding mode is changed to a higher order mode. Step S516, ending the update process of the modulation and coding mode.
  • the base station is configured to measure the uplink RI and the CINR.
  • the direct statistical error rate is changed, and the modulation and coding mode caused by the inaccuracy of the channel quality information acquired by the base station may be avoided.
  • the steps shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and, although the logical order is shown in the flowchart, in some cases, The steps shown or described may be performed in an order different than that herein.
  • the embodiment of the invention further provides a base station, which can be used to implement the update method of the above modulation and coding mode.
  • FIG. 6 is a structural block diagram of a base station according to an embodiment of the present invention, including an obtaining module 62 and an updating module 64, which are described in detail below.
  • the obtaining module 62 is configured to obtain a bit error rate.
  • the updating module 64 is connected to the obtaining module 62, and is configured to update the modulation and coding mode according to the bit error rate acquired by the obtaining module 62.
  • the base station updates the modulation and coding mode according to the channel quality information.
  • the modulation and coding scheme of the error rate obtained by the obtaining module 62 is updated by the update module 64, so that the modulation and coding mode caused by the inaccuracy of the channel quality information acquired by the obtaining module 62 is not suitable, thereby improving as much as possible.
  • the acquisition module 62 includes an indication sub-module 622, a receiving sub-module 624, and a measurement sub-module. Block 626, which is described in detail below.
  • the indication sub-module 622 is configured to indicate, by using the REP-REQ message, the terminal that accesses the downlink error rate; the receiving sub-module 624 is configured to receive the downlink error rate from the terminal; and the measurement sub-module 626 is configured to measure the uplink error. Code rate. It should be noted that the downlink error rate can be accurately obtained by the terminal. Therefore, the preferred embodiment avoids the unsuitability of the modulation and coding mode due to inaccurate channel quality information in the related art. Then, the receiving sub-module 624 receives the error rate reported by the terminal, and updates the modulation and coding mode according to the error rate, so that the throughput of the entire network can be improved as much as possible.
  • the update module 64 includes a first update sub-module 642 and a second update sub-module 644, which are described in detail below.
  • the first update sub-module 642 is connected to the receiving sub-module 624 and the measurement sub-module 626 for receiving the downlink error rate measured by the sub-module 624 or the uplink error rate measured by the measurement sub-module 626 to the lower error rate.
  • the update modulation coding mode is a high-order modulation coding mode;
  • the second update sub-module 644 is connected to the reception sub-module 624 and the measurement sub-module 626 for receiving the downlink error rate or the measurement sub-module 624.
  • the modulation coding mode is updated to the modulation coding mode.
  • the high-order modulation and coding method corresponds to a high error rate. Therefore, if the error rate is lower than the bit error rate lower limit, the bit error rate still has a rising space. Therefore, the modulation coding mode can be updated to the higher-order modulation coding mode by the first update sub-module 642 under the requirement of the specified error rate, thereby improving the throughput of the entire network as much as possible.
  • the modulation coding method of the rank corresponds to the error rate of the Times.
  • the second update sub-module 644 updates the modulation coding mode to a low-order modulation coding mode, thereby ensuring compliance with a prescribed error rate requirement.
  • the idea in the present invention is equally applicable to other communication systems having AMC functions, such as LTE and the like.
  • the base station described in the device embodiment corresponds to the foregoing method embodiment, and the specific implementation process has been described in detail in the method embodiment, and is not described herein.
  • the above embodiment of the present invention provides a method for updating a modulation and coding scheme and a base station.
  • the base station updates the modulation and coding mode according to the acquired error rate, and solves the problem that the terminal uses the AMC demodulation signal based on the channel quality information in the related art, thereby causing the entire network throughput to decrease, thereby improving the whole as much as possible.
  • the throughput of the network can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

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

本发明公开了调制编码方式的更新方法及基站,该方法包括:基站获取误码率;根据误码率,更新所述调制编码方式。该基站包括:获取模块,用于获取误码率;更新模块,用于根据误码率,更新调制编码方式。本发明解决了终端使用基于信道质量信息的AMC解调信号从而导致整个网络吞吐量下降的问题,提高了整个网络的吞吐量。

Description

调制编码方式的更新方法及基站 技术领域 本发明涉及通信领域, 具体而言, 涉及一种调制编码方式的更新方法及 基站。 背景技术 随着通信技术的飞速发展宽带无线通信已经越来越受到重视, 自适应调 制编码 ( Adaptive Modulation and Coding , 简称为 AMC ) 算法作为宽带无线 通信的一个重要 ^既念也被大家所认识。 图 1是才艮据相关技术的 波接入全球互通( Worldwide Interoperability for Microwave Access, 简称为 WIMAX ) 的网络架构图终端、 接入网、 连接月艮 务网。 图 1 中, R1 由终端和接入网之间的空中口协议组成, R1可以包括相 关的管理平面协议。 R2由终端和连接月艮务网之间的协议组成, 包括鉴权、 业 务授权和互联网协议 (Internet Protocol, 简称为 IP ) 主机配置管理等。 这个 参考点是逻辑的, 并不表述在移动台 (Mobile Station, 简称为 MS ) 和连接 服务网之间有直接的协议接口, 两者之间的鉴权部分由归属网络服务提供商 ( Network Service Provider, 简称为 NSP ) 负责。 R2可以支持终端和连接月艮 务网之间的 IP主机配置管理。 R3 由一组接入网和连接服务网之间的控制面 十办议组成, 以支持认证 ¾权计费 ( Authentication、 Authorization and Accounting, 简称为 AAA )、 策略执行和移动性管理, 它也包括承载面的方 法(如隧道 )在接入网和连接月艮务网之间传递数据。 R4由一组控制面和 7 载 面的协议组成, 这些协议在接入网的不同功能实体中起始 /终止, 以支持终端 在接入网之间的移动性, R4 是相似或者不同接入网之间的共同参考点。 R5 由一组控制面协议和承载面协议组成。 完成归属 NSP和拜访 NSP之间的互 通。 目前, 通信技术中 AMC算法通常都是基于信道质量信息的, 也就是说 调制编码方式和编码速率的变化和跳变都取决于信道质量信息。 在实际应用 中, 终端设备向基站上报当前的信道质量信息, 基站根据该信道质量信息, 判断终端在目前的信号质量下, 能否以预定的误码率在高阶调制编码方式下 解调、 接收信号, 如果不能, 则强制终端使用低阶的调制编码方式, 从而保 证终端正常地接收数据。 通常, 相同地点的终端设备向基站上报的当前的信道质量信息应该是相 同的。 但是, 不同终端设备的厂商之间存在差异, 从而造成在相同地点不同 厂商的终端设备上报的信道质量信息并不相同, 进而造成基站根据该信道质 量信息指示该终端设备使用的调制编码方式并不相同。 这就可能造成如下的情况, 在当前的实际的信道质量下, 某一终端即便 使用高阶的调制编码方式也可以在规定误码率的要求下解调信号、接收数据, 但是, 由于其上报的信道质量信息较差, 基站指示该终端设备使用了低阶的 调制编码方式。
求下解调信号、 接收数据, 但是这将导致整个网络的吞吐量下降, 不利于网 络优 4匕和控制月艮务质量 ( Quality of Service, 简称为 QoS )。 发明内容 针对相关技术中终端使用基于信道质量信息的 AMC解调信号从而导致 整个网络吞吐量下降的问题而提出本发明, 为此, 本发明的主要目的在于提 供一种调制编码方式的更新方法及基站, 以解决上述问题。 为了实现上述目的, 根据本发明的一个方面, 提供了一种调制编码方式 的更新方法。 才艮据本发明的调制编码方式的更新方法包括: 基站获取误码率; 才艮据误 码率, 更新调制编码方式。 进一步地, 误码率包括下行误码率; 基站获取下行误码率包括: 基站通 过报告请求 REP - REQ消息指示接入其的终端上报下行误码率;基站接收来 自终端的下行误码率。 进一步地, REP - REQ消息还携带有用于终端测量误码率的测量规则以 及用于终端上 4艮下行误码率的上 4艮规则。 进一步地, 在 REP - REQ消息中携带上 4艮规则包括: 在 REP - REQ消 息中增加用于通知终端上报下行误码率的周期的字段。 进一步地, 在基站指示终端上 下行误码率之后, 还包括: 终端通过 4艮 告响应 REP - RSP消息上报下行误码率, 其中, 终端在 REP - RSP消息中增 加用于表示下行误码率的字段。 进一步地, 误码率包括上行误码率; 基站获取上行误码率包括: 基站测 量上行误码率。 进一步地, 在基站获取误码率之前, 还包括: 在终端接入基站的过程中, 基站与终端建立业务流; 基站为业务流配置误码率下限值和误码率上限值。 进一步地, -据误码率, 更新调制编码方式包括: 如果误码率氏于误码 率下限值, 则更新调制编码方式为高阶的调制编码方式; 如果误码率位于误 码率下限值和误码率上限值之间, 则不更新调制编码方式; 如果误码率高于 误码率上限值, 则更新调制编码方式为氏阶的调制编码方式。 为了实现上述目的, 才艮据本发明的另一方面, 还提供了一种基站。 根据本发明的基站包括: 获取模块, 用于获取误码率; 更新模块, 用于 才艮据误码率, 更新调制编码方式。 进一步地, 获取模块包括: 指示子模块, 用于通过 REP - REQ消息指示 接入其的终端上报下行误码率; 接收子模块, 用于接收来自终端的下行误码 率; 测量子模块, 用于测量上行误码率。 进一步地, 更新模块包括: 第一更新子模块, 用于在误码率低于误码率 下限值时, 更新调制编码方式为高阶的调制编码方式; 第二更新子模块, 用 于在误码率高于误码率上限值时,更新调制编码方式为氏阶的调制编码方式。 通过本发明, 釆用基站才艮据获取的误码率更新调制编码方式, 解决了相 关技术中终端使用基于信道质量信息的 AMC解调信号从而导致整个网络吞 吐量下降的问题, 进而尽可能提高了整个网络的吞吐量。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部 分, 本发明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的 不当限定。 在附图中: 图 1是才艮据相关技术的 WIMAX的网络架构图; 图 2是才艮据本发明实施例的调制编码方式的更新方法的流程图; 图 3为根据本发明优选实施例一的调制编码方式的更新方法的流程图; 图 4为才艮据本发明优选实施例二的调制编码方式的更新方法的流程图; 图 5为才艮据本发明优选实施例三的调制编码方式的更新方法的流程图; 图 6是 居本发明实施例的基站的结构框图。 具体实施方式 需要说明的是, 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。 下面将参考附图并结合实施例来详细说明本发明。 才艮据本发明的实施例, 提供了一种调制编码方式的更新方法。 图 2是才艮 据本发明实施例的调制编码方式的更新方法的流程图, 包括如下的步骤 S202 至步 4聚 S204: 步骤 S202, 基站获取误码率。 步骤 S204, 根据误码率, 更新调制编码方式。 相关技术中, 基站是根据信道质量信息更新调制编码方式的。 本发明实 施例中, 通过基站才艮据误码率更新调制编码方式, 可以避免基站获取的信道 质量信息不准确而造成的调制编码方式不适合, 从而尽可能提高了整个网络 的吞吐量。 优选地, 误码率包括下行误码率; 基站获取下行误码率包括: 基站通过 报告请求( Report Request , 简称为 REP - REQ )消息指示接入其的终端上报 下行误码率; 基站接收来自终端的下行误码率。 需要说明的是, 下行误码率可以被终端准确地获取到, 因此, 本优选实 施例避免了相关技术中由于信道质量信息不准确而造成的调制编码方式不适 合。 然后, 通过基站获取该终端上 4艮的误码率, 并 居该误码率相应地更新 调制编码方式, 可以尽可能提高了整个网络的吞吐量。 优选地, REP - REQ消息还携带有用于终端测量误码率的测量规则以及 用于终端上 4艮下行误码率的上 4艮规则。 需要说明的是, 一个基站通常对应着艮多终端, 通过为这些终端设置相 同的测量规则和上报规则, 可以规范这些终端测量与上报的误码率, 从而便 于基站 艮据该误码率相应地更新调制编码方式。 优选地, 在 REP - REQ消息中携带上 4艮规则包括: 在 REP - REQ消息 中增加用于通知终端上 4艮下行误码率的周期的字段。 需要说明的是, 在基站与终端的通信过程中, 误码率通常不会频繁大幅 地变化。 因此, 通过为终端设置上 4艮周期, 可以避免终端频繁地上 4艮误码率, 从而减轻基站的处理压力。 具体地, 可以按照下表 1所示在 REP - REQ消息 中增力口类型长度含义 ( Type Length Value, 简称为 TLV )„ 表 1 REP-REQ增力。的 TLV的示意表
Figure imgf000006_0001
优选地, 在基站指示终端上 下行误码率之后, 终端通过 艮告响应
( Report Respondence, 简称为 REP - RSP ) 消息上 4艮下行误码率, 其中, 终 端在 REP - RSP消息中增加用于表示下行误码率的字段。 需要说明的是, 通过规范终端上报误码率的方式, 可以便于基站根据该 误码率相应地更新调制编码方式。具体地,可以按照下表 2所示在 REP - RSP 消息中增力 TLV„ 表 2 REP-RSP增力。的 TLV的示意表
Figure imgf000006_0002
优选地, 误码率包括上行误码率; 基站获取上行误码率包括: 基站测量 上行误码率。 需要说明的是, 上行误码率可以被基站直接地、 准确地获取到, 因此, 本优选实施例避免了相关技术中由于信道质量信息不准确而造成的调制编码 方式不适合。 然后, 通过基站 居该误码率相应地更新调制编码方式, 可以 尽可能提高了整个网络的吞吐量。 优选地, 在基站获取误码率之前, 在终端接入基站的过程中, 基站与终 端建立业务流; 基站为业务流配置误码率下限值和误码率上限值。 需要说明的是, 建立业务流可以是配置相应的 QoS参数, 其可以用于确 定基站与终端之间规定的误码率的要求。 需要说明的是, 误码率下限值和误码率上限值可以用于比较误码率是否 超过可允许的范围, 其可以是根据需要预先设定的、 也可以是基站根据用户 和运营商签订的协议并根据相应的服务等级, 在终端入网过程中计算得出并 预先保存的。 通过误码率下限值和误码率上限值对是否更新调制编码方式进 行判断, 其实现方式简单、 容易实现。 优选地, 居误码率更新调制编码方式包括: 如果误码率氏于误码率下 限值, 则更新调制编码方式为高阶的调制编码方式; 如果误码率位于误码率 下限值和误码率上限值之间, 则不更新调制编码方式; 如果误码率高于误码 率上限值, 则更新调制编码方式为氏阶的调制编码方式。 需要说明的是, 高阶的调制编码方式对应着高误码率, 因此, 如果误码 率氐于误码率下限值, 则该误码率仍有上升的空间。 因此, 可以在规定误码 率的要求下更新调制编码方式为高阶的调制编码方式, 从而尽可能提高了整 个网络的吞吐量。 需要说明的是, 氏阶的调制编码方式对应着氏误码率, 因此, 如果误码 率高于误码率上限值, 则该误码率必须下调以符合规定的误码率的要求。 因 此, 更新调制编码方式为低阶的调制编码方式, 从而保证符合规定的误码率 的要求。 需要说明的是, 本发明中的思想也同样适用于其它具有 AMC功能的通 信系统中, 例如长期演进 (Long-Term Evolution, 简称为 LTE ) 等。 为了帮助理解上述实施例, 下面进一步描述本发明的其他多个优选实施 例。 优选实施例一 本优选实施例一描述了终端接入基站后, 终端根据基站的指示上报误码 率, 然后基站才艮据该误码率更新调制编码方式的过程。 图 3为根据本发明优选实施例一的调制编码方式的更新方法的流程图, 包括如下的步骤 S302至步骤 S310: 步骤 S302, 终端搜到网络之后, 尝试进行接入。 步骤 S304, 表示基站和终端的接入信令, 其中包括基本能力协商, 鉴权 过程, 注册过程等。 需要说明的是,步骤 S302和步骤 S304与标准的 WIMAX接入过程相同。 步骤 S306, 基站通过 REP-REQ消息请求终端进行误码率上报。 步骤 S308,终端通过 REP-REQ中的要求利用 REP-RSP信令上 4艮误码率。 步骤 S310, 基站 居上 4艮的误码率决定新的调制解调方式。 优选实施例二 本优选实施例二详细描述了终端接入基站后, 终端根据基站的指示上报 下行误码率, 然后基站 居该下行误码率更新调制编码方式的过程。 图 4为才艮据本发明优选实施例二的调制编码方式的更新方法的流程图, 包括如下的步骤 S402至步骤 S418: 步骤 S402 , 基站接收到来自终端的接入消息。 步骤 S404 , 基站从 AAA获取用户的配置信息。 步骤 S406,基站根据用户的配置信息建立相应的业务流。需要说明的是, 步骤 S402至步骤 S406与标准的 WIMAX接入过程相同。 步骤 S408,基站 居建立的业务流为相应的终端的各个业务流配置默认 的误码率上限和误码率下限。 步骤 S410, 基站指示终端进行下行误码率的测量和测量结果的上 4艮。 需要说明的是, 基站可以通过 REP-REQ 消息通知终端进行下行误码率 的测量, 同时, 基站还可以通知终端测量规则和上报规则。 步骤 S412, 终端按照基站的要求开始下行测量误码率并统计该误码率, 然后按照要求进行上报。 具体地, 终端通过基站设定的规则统计和利用 REP-RSP信令上艮统计结果。 步骤 S414,基站 居误码率判断是否更新调制编码方式。其判断原则为: 误码率是否在上述误码率上限与误码率下限之间。 如果误码率在上述误码率 上限与误码率下限之间, 则直接进入步骤 S418, 否则进入步骤 S416。 步骤 S416, 更新调制编码方式。 需要说明的是, 可以按照下述规则更新调制编码方式。 如果误码率大于 设定的误码率上限, 则改变调制编码方式到更氏阶的方式, 如果误码率小于 设定的调制编码方式, 则改变调制编码方式到更高阶的方式。 步 4聚 S418 , 结束调制编码方式的更新过程。 需要说明的是, 相关技术中基站是要求终端上报 CINR或终端 RI的, 本 优选实施例二中改为终端直接上报误码率, 可以避免基站获取的信道质量信 息不准确而造成的调制编码方式不适合, 从而尽可能提高了整个网络的吞吐 量。 优选实施例三 本优选实施例三详细描述了终端接入基站后, 基站测量上行误码率, 然 后才艮据该上行误码率更新调制编码方式的过程。 图 5为才艮据本发明优选实施例三的调制编码方式的更新方法的流程图, 包括如下的步骤 S502至步骤 S516: 步骤 S502 , 基站接收到来自终端的接入消息。 步骤 S504 , 基站从 AAA获取用户的配置信息。 步骤 S506,基站根据用户的配置信息建立相应的业务流。需要说明的是, 步骤 S502至步骤 S506与标准的 WIMAX接入过程相同。 步骤 S508,基站 居建立的业务流为相应的终端的各个业务流配置默认 的误码率上限和误码率下限。 步骤 S 510 , 基站测量上行误码率。 步骤 S512,基站根据误码率判断是否更新调制编码方式。其判断原则为: 误码率是否在上述误码率上限与误码率下限之间。 如果误码率在上述误码率 上限与误码率下限之间, 则直接进入步骤 S516, 否则进入步骤 S514。 步骤 S514, 更新调制编码方式。 需要说明的是, 可以按照下述规则更新调制编码方式。 如果误码率大于 设定的误码率上限, 则改变调制编码方式到更氏阶的方式, 如果误码率小于 设定的调制编码方式, 则改变调制编码方式到更高阶的方式。 步骤 S516, 结束调制编码方式的更新过程。 需要说明的是, 相关技术中基站是测量上行 RI和 CINR的, 本优选实施 例三中改为直接统计误码率, 可以避免基站获取的信道质量信息不准确而造 成的调制编码方式不适合, 从而尽可能提高了整个网络的吞吐量。 需要说明的是, 在附图的流程图示出的步骤可以在诸如一组计算机可执 行指令的计算机系统中执行, 并且, 虽然在流程图中示出了逻辑顺序, 但是 在某些情况下, 可以以不同于此处的顺序执行所示出或描述的步骤。 本发明实施例还提供了一种基站, 该基站可以用于实现上述调制编码方 式的更新方法。 图 6是根据本发明实施例的基站的结构框图, 包括获取模块 62和更新模块 64 , 下面对其进行详细描述。 获取模块 62 , 用于获取误码率; 更新模块 64 , 连接至获取模块 62 , 用 于才艮据获取模块 62获取的误码率, 更新调制编码方式。 相关技术中, 基站是根据信道质量信息更新调制编码方式的。 本发明实 施例中 ,通过更新模块 64 居获取模块 62获取的误码率更新调制编码方式, 可以避免获取模块 62 获取的信道质量信息不准确而造成的调制编码方式不 适合, 从而尽可能提高了整个网络的吞吐量。 优选地, 获取模块 62包括指示子模块 622、 接收子模块 624和测量子模 块 626 , 下面对其进行详细描述。 指示子模块 622 , 用于通过 REP - REQ消息指示接入其的终端上报下行 误码率;接收子模块 624 ,用于接收来自终端的下行误码率;测量子模块 626 , 用于测量上行误码率。 需要说明的是, 下行误码率可以被终端准确地获取到, 因此, 本优选实 施例避免了相关技术中由于信道质量信息不准确而造成的调制编码方式不适 合。 然后, 通过接收子模块 624接收该终端上报的误码率, 并根据该误码率 相应地更新调制编码方式, 可以尽可能提高了整个网络的吞吐量。 优选地, 更新模块 64包括第一更新子模块 642和第二更新子模块 644 , 下面对其进行详细描述。 第一更新子模块 642 , 连接至接收子模块 624和测量子模块 626 , 用于 在接收子模块 624接收的下行误码率或者测量子模块 626测量的上行误码率 氐于误码率下限值时, 更新调制编码方式为高阶的调制编码方式; 第二更新 子模块 644 , 连接至接收子模块 624和测量子模块 626 , 用于在接收子模块 624接收的下行误码率或者测量子模块 626测量的上行误码率高于误码率上 限值时, 更新调制编码方式为氏阶的调制编码方式。 需要说明的是, 高阶的调制编码方式对应着高误码率, 因此, 如果误码 率氐于误码率下限值, 则该误码率仍有上升的空间。 因此, 可以在规定误码 率的要求下通过第一更新子模块 642更新调制编码方式为高阶的调制编码方 式, 从而尽可能提高了整个网络的吞吐量。 需要说明的是, 氏阶的调制编码方式对应着氏误码率, 因此, 如果误码 率高于误码率上限值, 则该误码率必须下调以符合规定的误码率的要求。 因 此, 通过第二更新子模块 644更新调制编码方式为低阶的调制编码方式, 从 而保证符合规定的误码率的要求。 需要说明的是, 本发明中的思想也同样适用于其它具有 AMC功能的通 信系统中, 例如 LTE等。 需要说明的是, 装置实施例中描述的基站对应于上述的方法实施例, 其 具体的实现过程在方法实施例中已经进行过详细说明, 在此不再赞述。 综上所述, 居本发明的上述实施例, 提供了一种调制编码方式的更新 方法及基站。 通过使用基于误码率的 AMC控制, 可以充分考虑各个产品的 差异性, 考虑各个用户在不同时间段的性能需求, 不同的用户的性能需求。 通过本发明, 釆用基站根据获取的误码率更新调制编码方式, 解决了相关技 术中终端使用基于信道质量信息的 AMC解调信号从而导致整个网络吞吐量 下降的问题, 进而尽可能提高了整个网络的吞吐量。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可 以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, 或者分布 在多个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程 序代码来实现, 从而, 可以将它们存储在存储装置中由计算装置来执行, 或 者将它们分别制作成各个集成电路模块, 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, 本发明不限制于任何特定的硬件和软 件结合。 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^"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 一种调制编码方式的更新方法, 其特征在于, 包括:
基站获取误码率;
才艮据所述误码率, 更新所述调制编码方式。 才艮据权利要求 1所述的方法, 其特征在于, 所述误码率包括下行误码率; 所述基站获取所述下行误码率包括:
所述基站通过 4艮告请求 REP - REQ 消息指示接入其的终端上 4艮所 述下行误码率;
所述基站接收来自所述终端的所述下行误码率。 根据权利要求 2所述的方法, 其特征在于, 所述 REP - REQ消息还携带 有用于所述终端测量所述误码率的测量规则以及用于所述终端上 4艮所述 下行误码率的上 4艮规则。 根据权利要求 3所述的方法, 其特征在于, 在所述 REP - REQ消息中携 带所述上报规则包括:
在所述 REP - REQ 消息中增加用于通知所述终端上 4艮所述下行误 码率的周期的字段。 根据权利要求 2所述的方法, 其特征在于, 在所述基站指示所述终端上 报所述下行误码率之后, 还包括:
所述终端通过报告响应 REP - RSP消息上报所述下行误码率,其中, 所述终端在所述 REP - RSP 消息中增加用于表示所述下行误码率的字 段。 才艮据权利要求 1所述的方法, 其特征在于, 所述误码率包括上行误码率; 所述基站获取所述上行误码率包括: 所述基站测量所述上行误码率。 根据权利要求 1至 6中任一项所述的方法, 其特征在于, 在所述基站获 取所述误码率之前, 还包括:
在所述终端接入所述基站的过程中, 所述基站与所述终端建立业务 流; 所述基站为所述业务流配置误码率下限值和误码率上限值。
8. 居权利要求 7所述的方法, 其特征在于, -据所述误码率, 更新所述 调制编码方式包括:
如果所述误码率氏于所述误码率下限值, 则更新所述调制编码方式 为高阶的调制编码方式;
如果所述误码率位于所述误码率下限值和所述误码率上限值之间, 则不更新所述调制编码方式;
如果所述误码率高于所述误码率上限值, 则更新所述调制编码方式 为低阶的调制编码方式。
9. 一种基站, 其特征在于, 包括:
获取模块, 用于获取误码率; 更新模块, 用于 居所述误码率, 更新所述调制编码方式。
10. 根据权利要求 9所述的基站, 其特征在于, 所述获取模块包括:
指示子模块, 用于通过 REP - REQ消息指示接入其的终端上报所述 下行误码率;
接收子模块, 用于接收来自所述终端的所述下行误码率; 测量子模块, 用于测量所述上行误码率。
11. 根据权利要求 9所述的基站, 其特征在于, 所述更新模块包括:
第一更新子模块, 用于在所述误码率低于误码率下限值时, 更新所 述调制编码方式为高阶的调制编码方式;
第二更新子模块, 用于在所述误码率高于所述误码率上限值时, 更 新所述调制编码方式为氏阶的调制编码方式。
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