A method of synchronising radio base stations using multiple DSL links

Abstract

A radio communication system and a radio base station apparatus which are capable of high-speed transmission and the network synchronization using a metallic subscriber line are provided. The radio communication system has a plurality of radio base station apparatus CS which accommodates a radio terminal PS, a communication apparatus 1 which is connected to a IP network 4, and a digital subscriber line L3 which connects the radio base station apparatus CS and the communication apparatus. The radio base station apparatus CS has a clock unit which generates a clock of predetermined frequency common to each radio base station apparatus CS based on a signal supplied from the communication apparatus 1 via the digital subscriber line L3. The radio base station apparatus CS communicates the data with the radio terminal PS using a radio frame of a time division created based on the clock which the clock unit generates.

Description

[0001] This application is based on and claims priority from Japanese Patent Application No. 2008-270936 filed on October 21, 2008, the entire contents of which are hereby incorporated by reference. technical field [0002] The present invention relates to a wireless communication system in which a wireless terminal device communicates with a communication counterpart via a wireless base station device, and a wireless base station device used in the wireless communication system. Background technique [0003] With the development of information and communication technology, subscriber lines as the infrastructure for Internet access and information transmission paths have become popular in companies, stores, and households. In the past, the digital transmission method of metal subscriber line (metallic subscriber line) was used, and the basic rate interface of ISDN (Integrated Services Digital Network) or ADSL (Asymmetric Digital Subscriber Line) which is one of the technologi...

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