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Method and system for realizing empty pont synchronous emitting data

A technology for air interface synchronization and data transmission, which is applied in the field of communication

Inactive Publication Date: 2006-10-25
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, how to achieve synchronous transmission of MBMS services of different cells in a cell group when MBMS supports soft combining

Method used

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  • Method and system for realizing empty pont synchronous emitting data
  • Method and system for realizing empty pont synchronous emitting data
  • Method and system for realizing empty pont synchronous emitting data

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Embodiment Construction

[0036] In order to facilitate those skilled in the art to understand and implement the present invention, the embodiments of the present invention are now described with reference to the accompanying drawings.

[0037] The basic idea of ​​the present invention is that the RNC obtains the time offset between the RFN (RNC frame number) of the RNC and the CFN of the FACH (forward access channel) for sending MBMS services in each cell through the transmission channel synchronization process, and then uses the time The offset realizes the synchronous transmission of the MBMS service in each cell in the RNC.

[0038] To facilitate the description of this application, the symbols are defined as follows:

[0039] T frame Is the length of the wireless frame, with a value of 10ms.

[0040] RFN is the RNC frame number and the value range is 0 to 4095; if RFN_C is defined as RFN mod 256, the value range of RFN_C is 0 to 255.

[0041] CFN is the FACH frame number, and the value range is 0 to 2...

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Abstract

This invention discloses a method for realizing empty synchronization including: a radio network controller gets a time deviation between its frame number and the connection frame numbers of the front access channels of the areas based on the synchronized process of transmission channels, thus, the time delay difference among different areas is less than half transmission time interval based on the deviation and the offset volume of the transmission time interval is got. This invention also discloses a method and a system for realizing empty synchronous data sending.

Description

Technical field [0001] The present invention relates to a communication technology, in particular to a method and a system for realizing synchronous data transmission through an air interface. Background technique [0002] With the development of communication services, the application of MBMS services has become more and more extensive, and people have higher requirements for the quality of MBMS services. When the UE (user terminal) moves and is at the edge of the cell, handover may occur in this area. During handover, it is necessary to combine the signals of the active cell according to the bearer mode adopted by the cell on the air interface (such as PTP bearer or PTM bearer). Therefore, the signal quality received by the UE fluctuates the most in this area. [0003] In the prior art, when the MBMS (Broadcast Multicast Service) service is carried by PTP (point-to-point) on the air interface, the soft handover function can be supported, and the downlink PTP bearers of the same...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04Q7/38
Inventor 胡军
Owner HUAWEI TECH CO LTD