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Relay timing adjusting method, system and device

A technology of relay equipment and timing adjustment, which is used in transmission systems, radio transmission systems, electrical components, etc.

Active Publication Date: 2014-04-02
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Embodiments of the present invention provide a relay timing adjustment method, system, and device, which are used to solve the problem of how to synchronize the downlink transmission of the eNB and the downlink transmission of the RN in the LTE-A system

Method used

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  • Relay timing adjusting method, system and device
  • Relay timing adjusting method, system and device
  • Relay timing adjusting method, system and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] In this embodiment, the base station generates an uplink timing adjustment command TAC according to the random access signal sent by the relay device during the initial access process UL Send a timing adjustment command TAC with the access link downlink subframe DL ,details as follows:

[0101] Base station side:

[0102] Step 1: The base station detects the PRACH and feeds back the TAC to the relay device UL ;

[0103] Step 2: When it is determined that the current communication object is a relay device, calculate TAC according to the detected random access signal DL , and feedback TAC DL to the relay device;

[0104] Trunk side:

[0105] Step 1: After the relay device initiates random access through the PRACH, it detects the random access feedback information of the base station;

[0106] Step 2: After detecting the random access feedback information, according to the TAC UL Adjust the uplink transmission timing of the backhaul link;

[0107] Step 3: Receive...

Embodiment 2

[0109]In this embodiment, the base station generates the uplink timing adjustment command TAC according to the random access signal sent by the relay device according to the instructions of the base station during normal communication. UL Send a timing adjustment command TAC with the access link downlink subframe DL ,details as follows:

[0110] Base station side:

[0111] Step 1: the base station sends a random access instruction command to the relay device;

[0112] Step 2: Detect the random access signal sent by the corresponding relay device through the PRACH, and calculate the TAC according to the detected random access signal UL and TAC DL ;

[0113] Step 3: Feedback TAC UL and TAC DL to the relay device;

[0114] Trunk side:

[0115] Step 1: After receiving the random access instruction command from the eNB, the relay device initiates random access through the PRACH;

[0116] Step 2: Detect the random access feedback information of the base station and obtain ...

Embodiment 3

[0120] In this embodiment, the base station generates an accumulative timing adjustment command TAC according to the signal sent by the relay device during normal communication, as follows:

[0121] Base station side:

[0122] Step 1: The base station calculates TACa according to the signal sent by the relay device;

[0123] Step 2: Send TACa to the relay device;

[0124] Trunk side:

[0125] Step 1: The relay device receives TACa;

[0126] Step 2: Adjust the uplink transmission timing of the backhaul link and the downlink transmission timing of the relay device according to the TACa.

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PUM

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Abstract

An embodiment of the present application provides a relay timing adjustment method, system and device, relating to the technical field of wireless communications, for use in solving the problem of how to synchronize base station downlink transmission and relay device downlink transmission in an Advanced Long Term Evolution (LTE-A) system. In this application, the base station sends an access downlink transmission timing adjustment command to the relay device. When the relay device receives said access downlink transmission timing adjustment command, the downlink transmission timing is adjusted in said relay device according to said received access downlink transmission timing adjustment command. This invention is thus able to synchronize relay device access downlink transmission timing with base station downlink transmission timing.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a relay timing adjustment method, system and equipment. Background technique [0002] In the long-term evolution upgrade (LTE-A) system, in order to improve the system throughput and increase the network coverage, a relay device (Relay Node, RN) is introduced, such as figure 1 As shown, the base station (eNB) is connected to the core network (CN) through a wired interface, and the RN is connected to the eNB through a wireless interface; the terminal (UE) is connected to the RN or eNB through a wireless interface. The link between the RN and the base station is called a backhaul (backhaul) link, and the link between the RN and the UE is called an access link. [0003] Regardless of the time division duplex (TDD) system or the frequency division duplex (FDD) system, the transmission of the signal sent by the eNB on the backhaul link to the RN requires a cert...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04W88/08H04W92/20
CPCH04B7/155H04W56/0015H04W72/042H04W92/10H04W56/0045H04W72/23
Inventor 王立波沈祖康潘学明肖国军张文健
Owner DATANG MOBILE COMM EQUIP CO LTD