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Method of time synchronization in broad band CDMA

A wideband code division multiple access and time synchronization technology, used in code division multiplexing systems, communication between multiple stations, synchronization devices, etc. and other problems to achieve the effect of solving time synchronization

Inactive Publication Date: 2003-12-03
ZTE CORP
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AI Technical Summary

Problems solved by technology

The third-generation wireless communication network has not yet defined the time synchronization method between each node in the system in the wideband code division multiple access (WCDMA) cellular mobile communication system, so it may cause problems between RNC and NodB, between different NodeBs and other network nodes. A situation where the time cannot be synchronized between
This method does not consider the transmission delay of the network, and when the network composition is relatively complex, there may be non-negligible transmission delay, and only 32bit unsigned binary second counting is provided to the client. I am afraid that in some current applications Accuracy cannot meet the requirements
Although the accuracy of the NTP protocol and the handling of transmission delays can meet the requirements, its protocol is relatively complicated, and a field in the message structure requires DES encryption and decryption as an authority authentication for the broadcast message of the server, which leads to the realization of The complexity of the larger, not suitable for this occasion

Method used

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  • Method of time synchronization in broad band CDMA
  • Method of time synchronization in broad band CDMA
  • Method of time synchronization in broad band CDMA

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Embodiment Construction

[0013] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0014] The scheme of the present invention is mainly based on the following premise: the one, accurate time information can be obtained through the operation and maintenance center OMC (or RNC); Connection or IPOA connection, the radio network controller RNC and NodeB have an IPOA channel;

[0015] The operation and maintenance center OMC of the WCDMA system provides the function of the time service center and realizes the server of SNTP. It supports broadcast mode and Unicast (server and client point-to-point message interaction) mode to support both point-to-multipoint and point-to-point application requirements.

[0016] As a client who implements SNTP on the RNC and NodeB of each node in the WCDMA system network, he can actively request to obtain the time value through Unicast, or obtain the time value by receiving the broadcast from the server for synch...

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Abstract

A time synchronizing method between nodes in WCDMA system includes setting up time synchronization parameters, starting SNTP service on time server, actively transmitting request information from wireless network controller or wireless network access node to the time server, choosing and judging the SNTP service mode, regularly broadcasting time information by time server for broadcast mode or regularly requesting time information from client to time server for point-to-point mode to obtain time information, and removing transmission delay to complete time synchronization.

Description

Technical field: [0001] The invention relates to a time synchronization method in a wideband code division multiple access (WCDMA) cellular mobile communication system, in particular to a radio network controller (RNC) and a radio network access point (NodeB) in a universal terrestrial radio access network (UTRAN) Accurate time value acquisition and technical issues of time synchronization. Background technique: [0002] Accurate time information in the network plays a very important role in the services provided by the network. With the development of wireless communication technology, the communication network is becoming more and more complex and large, which also brings great challenges to how each node in the network can obtain accurate time. big difficulty. The third-generation wireless communication network has not yet defined the time synchronization method between each node in the system in the wideband code division multiple access (WCDMA) cellular mobile communi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04B7/26H04J13/00
Inventor 沈毅董嘉樊永宁
Owner ZTE CORP
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