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Method of controlling relay communication

A relay communication and relay station technology, applied in wireless communication, relay system monitoring, active electrical relay system, etc., can solve problems such as not providing a communication system

Inactive Publication Date: 2009-03-11
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0064] However, conventional communication technologies do not provide a method for a communication system including RS, in which terminals, RS, and BS can communicate with each other according to state changes of wireless channels

Method used

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  • Method of controlling relay communication
  • Method of controlling relay communication
  • Method of controlling relay communication

Examples

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no. 1 approach

[0089] The base station (BS) compares the uplink signal quality between the BS and the terminal with the uplink signal quality of the signal received by the BS through the relay station (RS), and determines whether to perform direct communication with the terminal or allow the RS to Signals communicated between the BS and the terminal are relayed. If the BS determines that it is necessary to increase the throughput, the BS tries to relay the signal of the terminal through the RS.

[0090] In order to acquire uplink signal quality information of the terminal, the BS causes the terminal to transmit the signal quality information periodically or when certain conditions are satisfied.

[0091] The terminal can use a specific channel or MAC message to transmit signal quality information periodically or when a specific condition is met. For example, specific channels include CQICH, and MAC messages include REP-REQ / RSP MAC management messages.

[0092] The following is a descriptio...

no. 2 approach

[0164] The second embodiment of the present invention includes an example of a method for reporting a channel state in a system including an RS. A second embodiment will now be described with reference to the drawings.

[0165] Embodiments of the present invention relate to a terminal that communicates with a base station (BS) through a relay station (RS). A base station is a node connected to a backbone network to communicate with RSs and terminals. RS is a node communicating with BS. Preferably, the RS communicates wirelessly with the BS. More preferably, the RS communicates with the BS according to an OFDM / OFDMA scheme. The RS performs relay between the BS and the terminal. The term "relay" refers to a series of communication processes of receiving data destined for a terminal from a BS and transmitting the data to the terminal, receiving data destined for the BS from the terminal and transmitting the data to the BS. It is preferable to perform relaying according to th...

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Abstract

A method for reporting a channel status in a mobile communication system including a relay station (RS) is provided. When a mobile terminal in the coverage of a base station (BS) receives a service through an RS, the RS reports a channel status between the RS and the terminal to the BS to allow the BS to decide whether or not to communicate with the terminal through the RS. In the method, a first RS in communication with a BS and at least one terminal measures a channel quality with a first terminal and compares the measured channel quality with a threshold and transmits a report message to the BS according to the comparison. The report message is to request the BS to measure a channel quality of at least one of a second RS and the first terminal in communication with the BS.

Description

technical field [0001] The present invention relates to a communication method for a communication system including a relay station, in particular to a relay station (RS) reporting the channel status between the RS and a mobile terminal to a base station (BS) so that the BS can determine whether to communicate with the terminal through the RS The method of communication. Background technique [0002] It has been proposed to use a relay station (RS) to increase the cell coverage and throughput of a mobile communication system. The RS supports IEEE 802.16e terminals, has some functions of a base station (BS), and performs functions of an active transponder, including mobility, RRM, and security functions and a PMP-based RS network entry function. The RS can remove noise by decoding a signal received from a transmitting end and encoding and transmitting the signal to a receiving end. RS is also used as a digital amplifier, which can achieve higher throughput using higher data...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04B7/15H04B17/00H04L12/56H04B17/40H04W16/26
CPCH04W16/26H04W24/08H04W40/12H04W40/22H04W40/34H04W84/047H04B17/318
Inventor 尹爱兰柳麒善文斗铉金范峻
Owner LG ELECTRONICS INC