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Method and device for air frame synchronization between TDD-SCDMA base stations

A synchronous code division multiple access and time division duplex technology, applied in the field of telecommunications, can solve the problems of easy accumulation of errors in transmission delay, poor system reliability, etc., and achieve the effect of easy transplantation and easy positioning

Active Publication Date: 2006-02-08
ZTE CORP
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method and device for air frame synchronization between time division duplex synchronous code division multiple access base stations, to solve the problem that the existing synchronization technology requires RNC to participate, a large amount of handshake information is generated, and transmission delay is easy to accumulate errors , poor system reliability and technical problems affecting each other

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  • Method and device for air frame synchronization between TDD-SCDMA base stations
  • Method and device for air frame synchronization between TDD-SCDMA base stations
  • Method and device for air frame synchronization between TDD-SCDMA base stations

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Embodiment Construction

[0028] The present invention is a method and device for realizing the same frequency and phase of each Node B site, and the SFN frame is completely consistent. GPS is used as a unified reference source without the participation of RNC. NodeB realizes the same frequency, phase and frame number time by itself. same. Sites may not depend on each other. So that the locking time is very short, and there is no cumulative error of frequency and phase. It is relatively easy to implement, and it is easy to locate problems. The GPS card is also a universal device without additional requirements. It is easy to transplant the method and device.

[0029] The core of the present invention is the interface signal provided according to the GPS, which generally includes two kinds: one is the second pulse 1PPS (1 pulses per second, 1 second pulse timing signal), and the other is the standard serial port. On the one hand, the system control clock board can get GPS TOD (time of day, year, mon...

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Abstract

The invention discloses an apparatus and method for realizing frame synchronization between time-division duplex synchronizing code division multiple access base stations. The invention takes global positioning system (GPS) as reference; each base station gets frame number consistent to other base stations' according to the time information provided by GPS; the control clocks of each base station keep frequency and phase synchronizations with the pulse timing signal of GPS by loosely-coupled phase-locking mode. Without the participation of wireless network controller, the base stations can get same phase, same frequency and same frame time. It has the advantages of short locking time and zero frequency and phase cumulative error.

Description

technical field [0001] The invention relates to the field of telecommunication, in particular to a frame synchronization method and device for time division duplex synchronous code division multiple access base stations. Background technique [0002] In the third generation mobile communication, 3GPP (3 rd The Generation Partnership Project, the third generation partnership project) puts forward higher requirements for clock synchronization, especially in the time division duplex system, the concept of relay handover is proposed, which is suitable for synchronous CDMA (Code Division Multiple Access, code division multiple access ) mobile communication system is one of the core technologies of the TD-SCDMA (Time Division Duplex-Synchronous Code Division Multiplex Access, Time Division Duplex Synchronous Code Division Multiple Access) mobile communication system. Using the method can realize handover without interrupting communication and without losing information between T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26
Inventor 钟爽莉张建新
Owner ZTE CORP
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