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

Patent metadata

Field	Value
Publication number	US-9326287-B2
Application number	US-201514793110-A
Country	US
Kind code	B2
Filing date	Jul 7, 2015
Priority date	Aug 13, 2010
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

A relay station which performs radio communications with a base station and a mobile station, the relay station includes: a receiver configured to receive radio signals from the base station in downlink backhaul subframes, and to limit reception of radio signals from the base station in subframes other than the downlink backhaul subframes; and a controller configured to allow, when performing a random access to the base station, the receiver to receive a message of the random access even in the subframes other than the downlink backhaul subframes.

First claim

What is claimed is:

1. A relay station which performs radio communications with a base station and a mobile station, the relay station comprising:
a receiver configured to receive radio signals from the base station in downlink backhaul subframes, and to limit reception of radio signals from the base station in subframes other than the downlink backhaul subframes; and
a controller configured to allow, when performing a random access to the base station, the receiver to receive a message of the random access even in the subframes other than the downlink backhaul subframes.

2. A radio communication system comprising:
a base station;
a mobile station; and
a relay station which performs radio communications with the base station and the mobile station, the relay station including:
a receiver configured to receive radio signals from the base station in downlink backhaul subframes, and to limit reception of radio signals from the base station in subframes other than the downlink backhaul subframes; and
a controller configured to allow, when performing a random access to the base station, the receiver to receive a message of the random access even in the subframes other than the downlink backhaul subframes.

Assignees

• Fujitsu Ltd

Inventors

• Ohta Yoshiaki
• Kawasaki Yoshihiro
• Obuchi Kazuhisa
• Tajima Yoshiharu
• Tanaka Yoshinori

Classifications

• H04W74/002

  Transmission of channel access control information · CPC title

• H04B7/15528 Primary

  Control of operation parameters of a relay station to exploit the physical medium · CPC title

• H04W72/0446 Primary

  Resources in time domain, e.g. slots or frames · CPC title

• H04B7/15564

  Relay station antennae loop interference reduction · CPC title

• H04W74/00

  Wireless channel access · CPC title