CN1937478A - 改善无线通讯系统状态回报信令的传输速度的方法及装置 - Google Patents
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- H04L2001/125—Arrangements for preventing errors in the return channel
Abstract
用于无线通讯系统改善状态回报信令传输速度的方法,该无线通讯系统是操作于确认模式,该方法包含有将状态回报单元重复传输预定次数,该预定次数大于1。
Description
技术领域
本发明是指一种于无线通讯系统改善状态回报信令传输速度的方法及装置,尤指一种通过重复传输状态回报单元,以提高状态回报功能的正确性的方法及使用该方法的装置。
背景技术
随着信息时代的来临,移动语音、数据通讯与各种移动服务的需求日益增加,已知的移动通讯系统,已面临通讯频道不敷使用与传输速率不足的瓶颈。因此,可提供更高频谱使用率、更高速率传输服务的第三代移动通讯应运而生。相较于第二代移动通讯技术,第三代移动通讯最根本的差异在于采用宽带码分多址接入(Wideband Code Division Multiple Access,WCDMA)的无线接入方式,其是用以提供高度频谱利用效率、无远弗届的覆盖率及高质量、高速率的多媒体数据传输,同时还能同时满足各种不同的QoS服务要求,提供具弹性的多样化双向传输服务,并提供较佳的通讯质量,有效降低通讯中断率。
以第三代移动通讯联盟(the 3rd Generation partnership Project,3GPP)所制定的通信协议规范为例,第三代移动通讯系统可提供不同等级的传输质量,并可依据不同的传输质量要求,操作于不同的模式,如:透明模式(Transparent Mode,TM)、非确认模式(Unacknowledged Mode,UM)、确认模式(Acknowledged Mode,AM)。透明模式适用于对实时传输要求较高的服务,非确认模式适用于对实时传输及封包次序皆有要求的服务,而确认模式则适用于对实时传输要求不高,但数据正确性要求很高的服务。
在确认模式中,为了提高数据正确性,无线链路控制(Radio LinkControl,RLC)层通信协议中包含自动重传要求(Automatic RetransmissionRequest)流程。传输端可据以启动查询(Polling)功能,以检测数据传输状态,接收端收到该查询要求时,则启动状态回报(Status Report)功能,以将数据传输状态回传至传输端。当传输端要查询接收端时,会设定协议数据单元(Protocol Data Unit)的查询位(Polling Bit)为默认值(如1),当接收端收到该协议数据单元时,即代表收到查询要求,则接收端通过状态回报单元或夹带式(Piggybacked)状态回报单元将数据传输状态回传至传输端。如此一来,传输端可根据接收端输出的状态回报单元,执行后续运作,如推进传输窗、重传协议数据单元等。在传输端中,查询功能的启动可依据以下方式:
1、最后一新传协议数据单元:当协议数据单元为传输端最后一新传的协议数据单元时,启动查询流程,亦即将该协议数据单元的查询位设为默认值。
2、最后一重传协议数据单元:当协议数据单元为传输端最后一重传的协议数据单元时,启动查询流程。
3、催询定时器:于查询送出之后启动催询定时器。当该催询定时器(Timer_poll)逾时时,启动新的查询流程,进行催询。
4、每一定量协议数据单元:每传输一定数量的协议数据单元(包含重传及新传)即启动一次查询流程。
5、每一定量伺服数据单元:每传输一定数量的伺服数据单元(ServiceData Unit)即启动一次查询流程。
6、传输窗基准式:根据传输窗的已传输比率,启动查询流程。
7、时间基准式:传输端周期地每隔一段时间启动一次查询流程。
因此,根据不同的传输要求,系统可通过上述的启动方式适时启动传输端的查询功能,以要求接收端回传状态回报单元,从而检测数据传输状态。接收端启动接收状态回报程序的时机,除了收到上述查询要求之外,接收端可于检测到一或多个遗漏的协议数据单元时,主动输出状态回报单元至传输端,以提示传输端重传遗漏的协议数据单元,或者亦可周期性地每隔一段时间,主动输出状态回报单元至传输端,以回报数据传输状态。当传输端接收到接收端输出的状态回报单元后,可判断数据传输状态,以执行后续运作。
通过自动重传要求流程(查询及状态回报流程),可提高数据传输的正确性。然而,在无线传输过程中,上层信令信息(Signaling Message)可能会受干扰而发生错误,以致于查询及状态回报流程无法一次传送即有效完成,而导致上层信令信息的传输时间增加,影响电话接通时效。
当接收端于接收到查询要求时,会输出状态回报单元至传输端,以提示传输端重传遗漏的协议数据单元。此时,若传输该状态回报单元时,发生干扰或错误时,则传输端亦必需等待定时器Timer_poll逾时,才会重传要求查询的协议数据单元,接收端收到该协议数据单元后才会再输出状态回报单元,请参考图1。在图1中,传输端根据伺服数据单元(未绘于图1中)输出协议数据单元300、302、304,其序号分别为11、12、13,且协议数据单元304的查询位P被设定为1。若传输协议数据单元302时发生错误,使得接收端未成功接收到协议数据单元302,则接收端于收到协议数据单元304所含的查询要求后,会回传状态回报单元306,以提示传输端其欠收协议数据单元302。此时,若状态回报单元306于传输时发生错误,使得传输端无法收到状态回报单元306,因而无法得知接收端欠收协议数据单元302。接下来,等到定时器Timer_poll逾时时,传输端会判断传输发生问题而重传SN=13的协议数据单元304a。待接收端收到重传的协议数据单元304a后,由于仍未收到SN=12的协议数据单元302,接收端会再次回传状态回报单元306a至传输端,以提示传输端其欠收协议数据单元302。然后,根据状态回报单元306a,传输端会重传SN=12的协议数据单元302a,并将其查询位设为1。换句话说,若接收端检测到查询要求时,会输出状态回报单元至传输端。若该状态回报单元于传输时发生错误,已知技术虽可检测到这样的错误,但却无法防止这样的错误,因而降低了上层信令传输速率及使用时的便利性。
简言之,通过自动重传要求流程,已知技术可确保数据正确性。然而,若传输相关协议数据单元或状态回报单元发生错误时,会造成传输延迟的情形,因而影响传输速率及使用时的便利性。
发明内容
因此,本发明的主要目的即在于提供用于无线通讯系统改善状态回报信令传输速度的方法及相关装置。
本发明揭露一种用于无线通讯系统改善状态回报信令传输速度的方法,该无线通讯系统系操作于确认模式,该方法包含有将一状态回报单元重复传输预定次数,该预定次数大于1。
本发明还揭露一种用于无线通讯系统的无线通讯装置,用以改善状态回报信令传输速度,该无线通讯装置是操作于确认模式,包含有:硬件电路,用来实现该无线通讯装置的功能;处理器,用来执行程序代码以操控该硬件电路;以及储存存储器,用来储存该程序代码;其中该程序代码中包含有:将状态回报单元重复传输预定次数,该预定次数大于1。
附图说明
图1为已知第三代移动通讯系统传输状态回报单元发生错误时的示意图。
图2为本发明移动通讯装置的功能方块图。
图3为图2中程序代码的示意图。
图4为本发明一实施例流程的流程图。
图5为实现图4的流程的示意图。
[主要元件标号说明]
1100、1102、1102a、1104 协议数据单元
1106、1106a 状态回报单元
400 无线通讯装置
402 输入装置
404 输出装置
406 控制电路
408 中央处理器
410 储存装置
412 程序代码
414 收发器
500 应用程序层
502 第三层接口
506 第二层接口
508 伺服数据单元
512 缓冲器
514 协议数据单元
518 第一层接口
101 流程
1000、1002、1004、1006 步骤
具体实施方式
请参考图2,图2为无线通讯装置400的功能方块图。为求简洁,图4仅绘出无线通讯装置400的输入装置402、输出装置404、控制电路406、中央处理器408、储存装置410、程序代码412、及收发器414。在无线通讯装置400中,控制电路406通过中央处理器408执行储存于储存装置410中的程序代码412,从而控制无线通讯装置400的运作,其可通过输入装置402(如键盘)接收使用者输入的信号,或通过输出装置404(如屏幕、喇叭等)输出画面、声音等信号。收发器414用以接收或发送无线信号,将所接收的信号传送至控制电路406,或将控制电路406所产生的信号以无线电方式输出。换言之,以通讯协议的架构而言,收发器414可视为第一层的一部分,而控制电路406则用来实现第二层及第三层的功能。
请继续参考图3,图3为图2中程序代码412的示意图。程序代码412包含有应用程序层500、第三层接口502、及第二层接口506,并与第一层接口518连接。当发射信号时,第二层接口506根据第三层接口502输出的数据,形成多个伺服数据单元508存于缓冲器512中。然后,根据存于缓冲器512中的伺服数据单元508,第二层接口506产生多个协议数据单元514,并将所产生的协议数据单元514通过第一层接口518输出至目的端。相反地,当接收无线信号时,通过第一层接口518接收信号,并将所接收的信号以协议数据单元514输出至第二层接口506。第二层接口506则将协议数据单元514还原为伺服数据单元508并存于缓冲器512中。最后,第二层接口506将存于缓冲器512的伺服数据单元508传送至第三层接口502。
无线通讯装置400较佳地用于第三代移动通讯系统,当其操作于确认模式时,为了避免已知技术中传输效率不佳或传输资源浪费等问题,本发明可根据以下流程,于程序代码412中设定相关算法以解决已知技术的问题。
请参考图4,图4为本发明一实施例流程101的流程图。流程101包含以下步骤:
步骤1000:开始。
步骤1002:启动接收状态回报程序。
步骤1004:将状态回报单元重复传输预定次数,该预定次数大于1。
步骤1006:结束。
因此,根据本发明流程101,当接收端需要回传状态回报单元时,是将该状态回报单元传输两次以上,以确保该状态回报单元能成功传送至传输端。换句话说,本发明流程101是通过重复传输状态回报单元,以提高该状态回报单元正确传送至传输端的机率,从而提高传输效率,缩短传输延迟时间。
举例来说,在图5中,传输端根据伺服数据单元(未绘于图5中)输出协议数据单元1100、1102、1104,其序号分别为11、12、13,且协议数据单元1104的查询位P被设定为1。若传输协议数据单元1102时发生错误,使得接收端无法成功接收协议数据单元1102,则接收端于收到协议数据单元1104所含的查询要求后,会传输状态回报单元两次1106、1106a,以提示传输端其欠收协议数据单元1102。此时,若传输状态回报单元1106时发生错误,传输端仍可收到状态回报单元1106a,因而得知接收端欠收SN=12的协议数据单元1102,因此传输端会重传SN=12的协议数据单元1102a。一般是将协议数据单元1102a的查询位设为1,此点则与本发明无直接关系,并非本发明的必要特征。换句话说,根据流程101,若接收端检测到遗漏的协议数据单元时,会重复传输状态回报单元至传输端,以提示传输端其欠收协议数据单元。由于本发明可重复传输状态回报单元,因此可避免传输状态回报单元其中一个发生错误时造成传输延迟的情形,从而提升传输效率及使用时的便利性。
综上所述,本发明是通过重复传输状态回报单元,以提高状态回报功能的成功机率,从而提升传输效率及使用时的便利性,并缩短传输延迟时间。
以上所述仅为本发明的较佳实施例,凡依本发明权利要求范围所做的均等变化与修饰,皆应属本发明的涵盖范围。
Claims (4)
1.一种用于无线通讯系统改善状态回报信令传输速度的方法,该无线通讯系统系操作于确认模式,该方法包含有:
启动接收状态回报程序;
将状态回报单元重复传输预定次数,该预定次数大于1。
2.一种用于无线通讯系统的无线通讯装置,用以改善状态回报信令传输速度,该无线通讯装置是操作于确认模式,包含有:
硬件电路,用来实现该无线通讯装置的功能;
处理器,用来执行程序代码以操控该硬件电路;以及
储存存储器,用来储存该程序代码;其中该程序代码中包含有:
将状态回报单元重复传输预定次数,该预定次数大于1。
3.根据权利要求1所述的方法及权利要求2所述的无线通讯装置,其中该预定次数为2。
4.根据权利要求1所述的方法及权利要求2所述的无线通讯装置,其中该状态回报单元是夹带式状态回报单元。
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Cited By (1)
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2006
- 2006-08-22 TW TW095130775A patent/TW200713895A/zh unknown
- 2006-09-07 TW TW095133059A patent/TW200713933A/zh unknown
- 2006-09-19 CN CNA2006101388452A patent/CN1937477A/zh active Pending
- 2006-09-19 US US11/522,992 patent/US20070064668A1/en not_active Abandoned
- 2006-09-20 JP JP2006255044A patent/JP2007089174A/ja not_active Withdrawn
- 2006-09-20 JP JP2006255047A patent/JP2007089177A/ja not_active Withdrawn
- 2006-09-21 KR KR1020060091933A patent/KR20070033292A/ko not_active Application Discontinuation
- 2006-09-21 CN CNA200610138907XA patent/CN1937478A/zh active Pending
- 2006-09-21 KR KR1020060091979A patent/KR20070033299A/ko not_active Application Discontinuation
- 2006-09-21 EP EP06019798A patent/EP1768297A2/en not_active Withdrawn
- 2006-09-21 EP EP06019785A patent/EP1768296A2/en not_active Withdrawn
- 2006-09-21 US US11/524,367 patent/US20070064631A1/en not_active Abandoned
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103918212A (zh) * | 2011-09-26 | 2014-07-09 | 高通股份有限公司 | 用于在无线通信中重传协议数据单元的系统、方法和装置 |
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EP1768297A2 (en) | 2007-03-28 |
CN1937477A (zh) | 2007-03-28 |
EP1768296A2 (en) | 2007-03-28 |
US20070064631A1 (en) | 2007-03-22 |
TW200713895A (en) | 2007-04-01 |
KR20070033292A (ko) | 2007-03-26 |
US20070064668A1 (en) | 2007-03-22 |
JP2007089174A (ja) | 2007-04-05 |
TW200713933A (en) | 2007-04-01 |
KR20070033299A (ko) | 2007-03-26 |
JP2007089177A (ja) | 2007-04-05 |
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