CN107864498A - 在lte小基站系统中改进中继站传输性能的方法 - Google Patents

在lte小基站系统中改进中继站传输性能的方法 Download PDF

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Publication number
CN107864498A
CN107864498A CN201711112219.0A CN201711112219A CN107864498A CN 107864498 A CN107864498 A CN 107864498A CN 201711112219 A CN201711112219 A CN 201711112219A CN 107864498 A CN107864498 A CN 107864498A
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China
Prior art keywords
tti
denodeb
base station
bundle
lte
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Pending
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CN201711112219.0A
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English (en)
Inventor
刘泽
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SUZHOU WEIZHAN COMMUNICATION TECHNOLOGY Co Ltd
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SUZHOU WEIZHAN COMMUNICATION TECHNOLOGY Co Ltd
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Priority to CN201711112219.0A priority Critical patent/CN107864498A/zh
Priority to PCT/CN2017/110774 priority patent/WO2019090790A1/zh
Publication of CN107864498A publication Critical patent/CN107864498A/zh
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
    • 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
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals

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

Abstract

本发明公开了在LTE小基站系统中改进中继站传输性能的方法，其特征在于：源基站DeNodeB根据信道状态信息CSI在层二L2信令中通过字段RN‑SubframeCofig‑r10配置TTI bundling；DeNodeB通过R‑PDCCH中DCI调度新传一个下行数据，在TTI_BUNDLE_SIZE‑1后的下行回程子帧重传；TTI_BUNDLE_SIZE在DeNodeB和RN中定义，重传的资源分配和新传一样；RN用bundle的最后的TTI上的PUCCH上的信息反馈。本发明在回程下行链路使用TTI bundling传输下行信号，在无线信号差的条件下减少了传输延迟。将TTI bundling和中继Relay结合可以提高小区覆盖。在L2信令中配置TTI bundling可以避免UE重复解调下行数据，节省重传占用的DCI资源。

Description

在LTE小基站系统中改进中继站传输性能的方法
技术领域
本发明涉及在LTE小基站系统中改进中继站传输性能的方法。
背景技术
LTE 版本10 引进空口信号中继，是LTE 系统中的关键技术。LTE 的中继是decode-and-forward( 解码后前传) 中继，就是中继站RN(Relay Node) 把接收到的源基站DeNodeB(Donor eNodeB) 的空口信号解码后重新编码再发送给终端(UE)。只能经过一个中继站RN 把信号从源基站DeNodeB 传给UE。从DeNodeB 到RN 的空口链路叫回程链路backhaul link 定义为Un 口，从RN 到UE 的空口接入链路叫Uu 口。
带内中继(In-band relaying) 是LTE 系统中的一种重要中继类型。对于带内中继(In-band relaying)，回程链路、接入链路和直传链路都工作在相同的频谱上。一般情况下，为了避免中继站自身的接收端与发射端之间产生干扰，对于带内中继，规定回程链路和接入链路上不能同时进行下行或者上行的传输，而必须在时间上错开。因此，对于中继站来说，中继子帧分为回程子帧和接入子帧，中继站的回程链路下行和上行传输分别在下行和上行回程子帧上进行，接入链路下行和上行传输分别在下行和上行接入子帧上进行。对于下行回程子帧，中继站需要在该子帧前1 或2 个OFDM 符号上进行接入链路的下行发射，并且在剩余可用资源上进行回程链路的下行接收。TD-LTE 系统上下行子帧少，资源更紧张。
发明内容
本发明的目的在于提供一种在LTE小基站系统中改进中继站传输性能的方法，旨在解决上述问题。
为了实现上述目的，本发明的技术方案是设计一种在LTE小基站系统中改进中继站传输性能的方法，源基站DeNodeB根据信道状态信息CSI在层二L2信令中通过字段RN-SubframeCofig-r10配置TTI bundling；DeNodeB通过R-PDCCH 中DCI调度新传一个下行数据，在TTI_BUNDLE_SIZE-1 后的下行回程子帧重传；TTI_BUNDLE_SIZE 在DeNodeB 和RN 中定义，重传的资源分配和新传一样；RN 用bundle 的最后的TTI 上的PUCCH 上的信息反馈。
本发明的优点和有益效果在于：本发明在回程下行链路使用TTI bundling传输下行信号，在无线信号差的条件下减少了传输延迟。将TTI bundling 和中继Relay 结合可以提高小区覆盖。在L2 信令中配置TTI bundling 可以避免UE 重复解调下行数据，节省重传占用的DCI 资源。
具体实施方式
下面结合实施例，对本发明的具体实施方式作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。
实施例：
一种在LTE小基站系统中改进中继站传输性能的方法，源基站DeNodeB根据信道状态信息CSI在层二L2信令中通过字段RN-SubframeCofig-r10配置TTI bundling；DeNodeB通过R-PDCCH 中DCI调度新传一个下行数据，在TTI_BUNDLE_SIZE-1 后的下行回程子帧重传；TTI_BUNDLE_SIZE 在DeNodeB 和RN 中定义，重传的资源分配和新传一样；RN 用bundle 的最后的TTI 上的PUCCH 上的信息反馈。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (1)

1.在LTE小基站系统中改进中继站传输性能的方法，其特征在于：源基站DeNodeB根据信道状态信息CSI在层二L2信令中通过字段RN-SubframeCofig-r10配置TTI bundling；DeNodeB通过R-PDCCH 中DCI调度新传一个下行数据，在TTI_BUNDLE_SIZE-1 后的下行回程子帧重传；TTI_BUNDLE_SIZE 在DeNodeB 和RN 中定义，重传的资源分配和新传一样；RN 用bundle 的最后的TTI 上的PUCCH 上的信息反馈。
CN201711112219.0A 2017-11-13 2017-11-13 在lte小基站系统中改进中继站传输性能的方法 Pending CN107864498A (zh)

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PCT/CN2017/110774 WO2019090790A1 (zh) 2017-11-13 2017-11-14 在lte小基站系统中改进中继站传输性能的方法

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108668369A (zh) * 2018-04-10 2018-10-16 华为技术有限公司 下行控制信息的传输方法、设备及系统

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CN102802263A (zh) * 2011-05-25 2012-11-28 中兴通讯股份有限公司 一种mac层上行动态调度的方法和装置
CN103533575A (zh) * 2013-10-23 2014-01-22 苏州微站通信科技有限公司 在lte小基站系统中改进中继站传输性能的方法

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Publication number Priority date Publication date Assignee Title
CN103108392B (zh) * 2011-11-10 2017-12-15 中兴通讯股份有限公司 中继节点物理下行控制信道的资源分配方法及装置
CN103379628B (zh) * 2012-04-17 2018-07-20 中兴通讯股份有限公司 基于传输时间间隔捆绑的资源分配方法及移动终端
CN103634918B (zh) * 2013-12-19 2016-09-28 武汉邮电科学研究院 LTE系统中TTI bundling的资源分配方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102802263A (zh) * 2011-05-25 2012-11-28 中兴通讯股份有限公司 一种mac层上行动态调度的方法和装置
CN103533575A (zh) * 2013-10-23 2014-01-22 苏州微站通信科技有限公司 在lte小基站系统中改进中继站传输性能的方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108668369A (zh) * 2018-04-10 2018-10-16 华为技术有限公司 下行控制信息的传输方法、设备及系统
CN108668369B (zh) * 2018-04-10 2020-10-23 华为技术有限公司 下行控制信息的传输方法、设备及系统

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