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Base station apparatus, communication system and synchronization method

a technology of communication system and base station, applied in the direction of synchronization arrangement, electrical apparatus, time-division multiplex, etc., can solve the problem that each base station may be unable to synchronize with the other base stations with high precision apart from restart, and achieve the effect of high precision

Active Publication Date: 2014-06-19
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Ensures high-precision synchronization between base stations even when synchronization signals are not received, maintaining communication timing stability and preventing network load increases.

Problems solved by technology

As a result, each base station may be unable to synchronize with the other base stations with high precision apart from restart.

Method used

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  • Base station apparatus, communication system and synchronization method
  • Base station apparatus, communication system and synchronization method
  • Base station apparatus, communication system and synchronization method

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first embodiment

[0030]FIG. 1 is a diagram illustrating a configuration example of a communication system 1000 according to a first embodiment of the present invention. A communication system 1000 includes base station apparatuses (CS: cell stations) 100, communication terminals (PS: personal stations) 200, a SIP (session initiation protocol) server 300, a telephone 400, and a router 500.

[0031]A plurality of base station apparatuses 100 is hierarchically present within the communication system 1000. In FIG. 1, the plurality of CSs 100 is called CS 100M, CS 100M1, and CS 100M2. Referring to FIG. 1, the CS 100M is a device (timing master CS) which is arranged in the highest level hierarchy, and is, for example, a reference of synchronization. The CS 100M1 and CS 100M2 are devices (Slave CS) which are arranged in a lower level hierarchy than that of the CS 100M, and operate based on the synchronization reference of the CS 100M. The CS 100M1 and the CS 100M2 may be also hierarchically arranged. For exam...

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PUM

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Abstract

A base station apparatus includes a wireless communication unit, a wired communication unit, and a communication timing correction unit. If the wireless communication unit fails to receive a synchronization signal from another base station apparatus at given reception timing, the wired communication unit transmits a synchronization state confirmation signal for confirming a synchronization state between the base station and another base station apparatus, and receives a synchronization state response signal including a determination result of the synchronization state. The communication timing correction unit corrects a communication timing based on the synchronization state response signal.

Description

BACKGROUND[0001]1. Field of the Invention[0002]The present invention relates to a base station apparatus, a communication system and a synchronization method.[0003]2. Description of the Related Art[0004]In a related art communication system (for example, PBX (private branch exchange) wireless system), a communication terminal can move while sequentially switches a base station apparatus (hereinafter referred to merely as “base station”) to be communicated to another among a plurality of base stations. This switching of the base station is called “handover”. In order that the communication terminal preferably conducts the handover, the plurality of base stations needs to mutually synchronize their time information with each other.[0005]As a method of synchronizing the plurality of base stations with each other, the following method has been known. A time information server transmits the time information to the plurality of base stations through a LAN (local area network). Then, each ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04W56/00
CPCH04W56/00H04J3/0641H04W56/0015H04J3/0658
Inventor ISHIHARA, HIROYUKISUWA, YUTAKASHIBUTA, AKIRA
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD