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Method and apparatus for synchronizing base stations

A base station and time synchronization technology, applied in the direction of synchronization device, synchronization device, selection device, etc., can solve the problems of expensive technology and inconvenience

Inactive Publication Date: 2008-02-27
INTERDIGITAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These techniques are expensive and inconvenient since each base station has the source

Method used

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  • Method and apparatus for synchronizing base stations
  • Method and apparatus for synchronizing base stations
  • Method and apparatus for synchronizing base stations

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Embodiment Construction

[0013] FIG. 1 illustrates a simplified wireless spread spectrum code division multiple access (CDMA) or time division duplex (TDD) communication system 18. As shown in FIG. The system 18 includes a plurality of Node Bs 26 , 32 , . . . 34 , a plurality of RNCs 36 , 38 , . A Node B 26 within the system 18 communicates with associated user equipment 20-24 (UE). Node B 26 has associated with a single base station 30', or multiple base stations 30 1 ...30 n of a single position controller (SC) 30. Each base station serves an associated geographic area known as a cell. It should be noted that even if base station synchronization is disclosed, cell synchronization can be accomplished using the present invention.

[0014] A group of Node Bs 26, 32, 34 are connected to a radio network controller (RNC) 36 via the Iub interface. The RNCs 36...40 are also connected to the core network 46 via the Iub interface. For understanding, only one Node B is presented below, but the present in...

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Abstract

Method and apparatus for synchronizing base stations employing an independent synchronizing source or identifying a base station as a master source. An RNC (C-RNC) or a base station may designate one base station or a UE to acquire measurements derived from base stations to achieve synchronization. Synchronization activities may be regularly scheduled or may be undertaken when periodic measurements indicate that a drift value exceeds a given threshold.

Description

technical field [0001] The present invention generally relates to digital communication systems, and more particularly, the present invention relates to a system and method for synchronizing multiple base stations in a cellular communication system. Background technique [0002] proposed 3 rd Generation (3G) wireless communication protocols need to be based on simple, but expensive, methods of externally synchronizing each base station to a high-accuracy external source. Its technology to support base station synchronization requires the base station to passively listen for synchronization transmissions from its neighbors on a channel, such as the synchronization channel (SCH) or a common control physical channel (CCPCH), and to adopt methods similar to those provided by user equipment ( UE) those procedures performed for synchronization. Another approach requires each base station to occasionally transmit a particular synchronized burst based on one or more neighbors list...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/00H04L7/00H04B7/212H04B7/26H04L12/24H04W56/00H04W92/00
CPCH04B7/269H04B7/2687H04W56/00
Inventor 史帝芬·G·迪克詹姆士·M·米勒
Owner INTERDIGITAL TECH CORP
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