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Method and system for realizing empty port synchronous emitting data

A technology for air interface synchronization and data transmission, applied in the field of communication, to achieve the effect of meeting the delay difference limit

Inactive Publication Date: 2010-01-20
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 port synchronous emitting data
  • Method and system for realizing empty port synchronous emitting data
  • Method and system for realizing empty port synchronous emitting data

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Embodiment Construction

[0035] In order to make it easier for those skilled in the art to understand and realize the present invention, the embodiments of the present invention are described in conjunction with the accompanying drawings.

[0036] The basic thought of the present invention is, RNC obtains the RFN (RNC frame number) of RNC and the time offset between the CFN of FACH (forward access channel) that each subdistrict sends MBMS service through the transmission channel synchronization process, then utilizes this time The offset realizes the synchronous transmission of MBMS services in each cell in the RNC.

[0037] In order to facilitate the description of the present application, each symbol is defined as follows:

[0038] T Frame is the wireless frame length, and the value is 10ms.

[0039] RFN is the RNC frame number, and the value range is from 0 to 4095; if RFN_C is defined as RFN mod 256, the value range of RFN_C is from 0 to 255.

[0040] CFN is the FACH frame number, and its value...

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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 invention relates to a communication technology, in particular to a method and a system for realizing synchronous transmission of data by an air interface. Background technique [0002] With the development of communication services, the application of MBMS services is becoming more and more extensive, and people have higher requirements for the quality of MBMS services. , the signal of the active cell needs to be combined according to the bearer mode (such as PTP bearer or PTM bearer) adopted by the cell on the air interface during the handover. 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 adopts PTP (Point-to-Point) bearer on the air interface, it can support the soft handover function, and the downlink PTP bearer of the same user in different cells can realize soft combination. When the MBMS service adopts PTM (point-to-multipoin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26H04Q7/38
Inventor 胡军
Owner HUAWEI TECH CO LTD