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Switching method for user to cross base stations in high speed downlink packet access technology

An access technology and user technology, applied in the field of wireless communication, can solve the problems of wasting air interface resources, UE synchronization, and receiving interference of downlink data, etc., and achieve the effect of reducing interference, avoiding waste, and realizing simple handover process

Inactive Publication Date: 2010-03-31
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the introduction of HS-DSCH, the change of the data transmission control relationship leads to the following problems during the handover: when the handover occurs, the UE switches to the new configuration after the activation time is up, and because the NodeB side does not know There is still data, NodeB will continue to send data in the original cell
Since the UE has switched to the new cell at this time, the data sent in this part not only wastes the air interface resources of the original cell, but also causes great interference to the synchronization of the UE in the new cell and the reception of downlink data

Method used

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  • Switching method for user to cross base stations in high speed downlink packet access technology
  • Switching method for user to cross base stations in high speed downlink packet access technology
  • Switching method for user to cross base stations in high speed downlink packet access technology

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Embodiment Construction

[0037] In the prior art, when UE cross-NodeB handover occurs, the NodeB to which the original cell belongs continues to send data in the original cell. All UE data will be lost. Unnecessary data loss will be caused when the handover fails to roll back, and it is necessary to notify the UE to reset the MAC-HS entity when the handover fails through display designation, which complicates the handover process; if handover occurs, use The wireless link activation command deactivates the wireless link of the original cell when the activation time is up, and the wireless link of the original cell will no longer send or receive any data when the activation time is up. This makes it impossible for the UE to return to the original cell to perform dedicated channel synchronization after the handover fails, and cannot complete the rollback operation.

[0038] In order to overcome above-mentioned defective, propose technical scheme of the present invention now:

[0039]The present inventi...

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Abstract

The invention provides a switching method for a user to cross base stations in a high speed downlink packet access technology. The method comprises the following step: when a user switches among cellsbelonging to different base stations, a base station of an original cell of the user suspends the high speed downlink shared channel data transmission of the user. By adopting the technical scheme ofthe invention, when the user switches among the cells belonging to different base stations, a switching flow is simple to realize, which not only can reduce interferences to a new cell of the user, but also can avoid the waste of idle interface resources, and also can realize that a successful user can return to the original cell after the switching is failed.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to an optimization method for users switching between base stations in HSDPA (High Speed ​​Downlink Packet Access: High Speed ​​Downlink Packet Access) technology. Background technique [0002] An important feature of the third-generation mobile communication system is the unbalanced traffic volume of the uplink and downlink, and the traffic volume of the downlink will generally be greater than that of the uplink. In response to this requirement, 3GPP (3rd Generation Partnership Project) introduced a High Speed ​​Downlink Packet Access (HSDPA: High Speed ​​Downlink Packet Access) feature in the 3G specification. In the HSDPA feature, by introducing adaptive coding and modulation (AMC: Adaptive Modulation and Coding), hybrid automatic repeat request (HARQ: Hybrid Automatic Retransmission Request) technology and related technologies to reduce network processing delay, to provide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/08H04W56/00
Inventor 刘琛黄河
Owner ZTE CORP
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