Radio relay communication method, radio base station, and radio relay station in radio communication system

Abstract

Correct reception of messages and data by a mobile station or radio base station is enabled in a planned timing by adjusting a receiving or transmit timing in consideration of a time (an occurrence of a time lag) required for relay processing in a radio relay station within a radio communication system. For that purpose, time lag information related to a relay delay due to relay processing in theradio relay station is set to the radio base, the receiving timing of the mobile station is determined based on the time lag information, and the transmit timing of the radio base station 1 or the receiving timing of the mobile station is controlled according to the determined receiving timing.

Description

technical field [0001] The invention relates to a radio relay communication method, a radio base station and a radio relay station in a radio communication system. Background technique [0002] In recent years, as a radio communication technology, a technology called WiMAX (Worldwide Interoperability for Microwave Access) has attracted attention. WiMAX was developed as a technology for constructing a wireless MAN by enabling communication carriers and user households to be connected by radio instead of telephone lines or optical fiber lines, and enabling MAN (Metropolitan Area Network) of LAN (Local Area Network) interconnected WAN is wireless, and WiMAX can cover an area with a radius of about 50 km at a transmission speed of up to 70 Mbps using one radio base station. [0003] Currently, for example, IEEE has standardized IEEE Standard 802.16-2004 (2004-10-01) and IEEE Standard 802.16-2004 / Cor1 / D5 (2005-09-12) as WiMAX for fixed e / D12 (2005-10-14) is standardized as WiMA...

AI Technical Summary

Problems solved by technology

In such a case, the planned reception timing at the MS 300 assumed by the BS 100 and the planned reception timing calculated by the MS 300 based on an instruction from the BS 100 represent a point in time that is greatly different, resulting in reception errors of messages and data

[0017] If such a reception error occurs, transmission / reception of redundant control messages, etc., by retransmission control such as HARQ (Hybrid Automatic Repeat Request) increases, resulting in a reduction in the utilization of radio resources and resulting in reductions in throughput such as The communication quality of the

Images