General PCU frame number synchronizing method and system suitable for time domain reduced transmission time interval

A technology of transmission delay and frame number, which is applied in the general PCU frame number synchronization method and system field, can solve the problems of frame number out-of-synchronization, affecting business stability and performance, etc., to achieve performance, save transmission bandwidth, and reduce bandwidth The effect of occupation

CN102118190BActive Publication Date: 2014-02-05南通泰东机械有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2014-02-05

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Abstract

The present invention discloses a method and system which is applicable to a time domain RTTI for synchronizing a general PCU frame number. The method and the system are used to resolve some technical problems that desynchronization of the frame number is often generated, and the stability and the performance of the service is affected, after introducing the technology of the time domain RTTI. The present invention synchronizes the PCU frame number by using a time granularity of 5 milliseconds, and can guarantee the synchronization between the PCU frame and the Time Division Multiple Access (TDMA) frame under the precision claimed in the time domain RTTI, and the time delay of the system is reduced and the optimal performance of the time domain RTTI is realized at the same time as the stability of the frame synchronization is guaranteed and the Base Transmission Time Interval (BTTI) service is compatible.
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Description

technical field

[0001] The invention relates to the technical field of wireless communication, in particular to a general PCU frame number synchronization method and system suitable for reducing transmission delay in the time domain. Background technique

[0002] After adding PCU (Packet Control Unit, Packet Control Unit), the second-generation mobile communication system began to support packet domain data services, namely GPRS (General Packet Radio Service, General Packet Radio Service) and EGPRS (Enhanced General Packet Radio Service, enhanced type general packet radio service). The GPRS / EGPRS service adopts a 52-multiframe structure on the wireless side. One multiframe is divided into 12 wireless blocks, and one wireless block is composed of 4 consecutive bursts. The time of these 4 pulses is called BTTI (Base Transmission Time Interval, basic transmission delay) wireless block, about 20ms.

[0003] The PCU is responsible for assigning wireless blocks to several mobile...

Examples

Embodiment Construction

[0062] The basic idea of ​​the present invention is: adopt 5 milliseconds time granularity to carry out reduced transmission time delay (RTTI) frame number synchronous scheduling, when frame number is not synchronized, between packet control unit (PCU) and base transceiver station (BTS) with 5 milliseconds Send synchronization frames at time granularity; after the frame number synchronization is successful, when there is no wireless block to send and receive, no redundant synchronization frames are sent between the PCU and the BTS.

[0063] The present invention defines the basic time granularity of RTTI frame (block) synchronization as 5 milliseconds (ms), and the frame number synchronization under this time granularity can be well compatible with the block allocation of 20ms BTTI, 10ms RTTI and 5ms RTTI, so that the BTS side The RTTI wireless resource can be shared by BTTI TBF (Temporary Block Flow, temporary block flow) and RTTI TBF, therefore, once the frame number synchron...