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Soft switching method between mobile switching center in CDMA 2000 1X mobile communication system

A mobile switching center and mobile communication system technology, applied in the field of soft handover, can solve the problems of not knowing user information, traffic statistics cannot be performed, and soft handover cannot be fully satisfied

Inactive Publication Date: 2004-04-21
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But how can the T-MSC generate call detail records after the MS successfully accesses the cell it controls? In addition, when the MS switches to the service area of ​​the T-MSC through the A3 and A7 connections between the BSs, there is no location update process
Therefore, T-MSC does not know the user's information, and relevant traffic statistics cannot be performed.
[0037] Since the soft handover through the A3 and A7 connections between BSs is a new technology introduced by the CDMA2000 1X system, the existing mechanism cannot fully satisfy the soft handover between MSCs through the A3 and A7 connections between BSs

Method used

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  • Soft switching method between mobile switching center in CDMA 2000 1X mobile communication system
  • Soft switching method between mobile switching center in CDMA 2000 1X mobile communication system
  • Soft switching method between mobile switching center in CDMA 2000 1X mobile communication system

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Embodiment Construction

[0053] When the soft handover between MSCs is realized through the A3 and A7 connections between BSs, the S-MSC will notify the T-MSC through the handover notification operation whether the MS is in the service area of ​​the T-MSC. This message is used for T-MSC's billing, statistics and future supplementary services and value-added services. In the Handoff Notification operation, a new message—Handoff Notification (Handoff Notification) message will be sent from S-MSC to T-MSC.

[0054] Figure-1 describes the successful operation process of the handoff notification (Handoff Notification) message.

[0055] 101 When the S-MSC determines that the MS has performed soft handover between MSCs through the A3 and A7 connections between BSs, the S-MSC

[0056] MSC will send handover notification message to T-MSC.

[0057] The parameter settings in the switching notification message are shown in the table below.

[0058] parameter name

Parameter Description ...

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Abstract

A soft handover method among mobile switching centers in CDMA2000 1X mobile communication system, includes following steps: a. utilizes the connection of A3 and A7 among the current BS takes the procedure and message of soft handover; b. S-MSC informs T-MSC: between MSC the soft handover happens. This invention based on the procedure of soft handover of the connection of A3 and A7 between BS, studies the soft handover procedure of connection of A3 and A7 among MSC through BS, and provides material solving scheme, thereby makes it possible to use the soft handover between MSC replacing hard handover, in this way can reduce the expected Call dripping, meanwhile makes the T-MSC to be able to gain the relevant MS information after making soft handover between MSC through the connection of A3 an A7 between BS.

Description

technical field [0001] The invention relates to the soft handover of CDMA2000 1X system, in particular to the soft handover method between MSCs (Mobile Switching Centers) by using A3 and A7 connections between BSs (Base Stations). Background technique [0002] Soft handover is one of the unique key technologies of CDMA (Code Division Multiple Access) mobile communication system. It plays the role of traffic channel diversity at the junction of the coverage areas of two BSs, and can greatly reduce the call drop caused by handover. The so-called soft handover means that when the MS (mobile station) needs to communicate with a new BS, it does not interrupt the connection with the original BS first, but first gets in touch with the new BS, and then interrupts the connection with the original BS. In short, the connection between them is "connect first and then break". [0003] In the process of deploying CDMA network, China Unicom encountered the handover problem between MSCs. ...

Claims

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Application Information

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IPC IPC(8): H04W36/18
Inventor 李崑
Owner BEIJING SAMSUNG TELECOM R&D CENT
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