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Method for virtual soft hand-off

A soft handover and access terminal technology, applied in the field of virtual soft handover, can solve problems such as virtual soft handover effect discount, achieve the effect of eliminating delay and jitter, and ensuring service quality

Inactive Publication Date: 2008-11-12
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, although the air interface is continuously sending data, due to the influence of overlapping data, time delay (t3-t2) is still introduced, which greatly reduces the effect of virtual soft handover based on DSC

Method used

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  • Method for virtual soft hand-off
  • Method for virtual soft hand-off
  • Method for virtual soft hand-off

Examples

Experimental program
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Embodiment Construction

[0033] In order to make the purpose, technical solution and advantages of the present invention clearer, the following examples are given to further describe the present invention in detail.

[0034] From the data transmission process of virtual soft handover, it can be seen that before the access terminal changes the DRC, the access terminal has been receiving the downlink data from the source base station; The last byte ordinal of the data. Therefore, the present invention mainly utilizes the access terminal to report to the access network the information of the last data received by the access terminal from the source base station, that is, information related to the last downlink data sent by the source base station, so that the target base station can quickly and accurately know how to send The starting point of the data, so as to avoid the target base station from sending overlapping data, and completely eliminate the time delay and jitter caused by overlapping data.

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Abstract

The invention relates to a method of virtual soft switch, which comprises: the access terminal finds the SINR of target base station region is higher than the SINR of source base station region, to change the region mark of first reverse signal channel into from the source base station region to the target base station region; the access network controller fills descending data to the target base station; the access terminal feeds back the byte serial number information relative to the latest received data of access terminal and changes the region mark of second reverse signal channel from source base station to the target base station; the source base station stops sending data; the target base station sends data alignment relative to said byte serial number information to the access terminal. With said invention, the target base station can quick obtain the sent data, to eliminate time delay and vibration, to confirm the service quality of wireless grouped data application with high real-time demand.

Description

technical field [0001] The invention relates to the technical field of packet data transmission in a mobile communication system, in particular to a virtual soft handoff method. Background technique [0002] With the development of the communication industry, there are more and more signs that network IP is the development trend of the communication industry. The original voice service carried by Time Division Multiplex (Time Division Multiplex, TDM) will gradually but inevitably be replaced by IP voice ( Voice Over IP, VoIP) instead. In order to make Code Division Multiple Access (CDMA) 2000 system better support wireless integrated multimedia services including VoIP, such as World Wide Web (WWW), VoIP, Video Telephony (VT), etc., and better To adapt to the development of wireless Internet technology, Qualcomm has developed High Data Rate (HDR) technology, which has been accepted by the Communications Industry Association / Electronic Industries Association (TIA / EIA) as the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/38H04W36/08H04L1/16H04W36/18
Inventor 邓爱林
Owner HUAWEI TECH CO LTD
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