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Smooth switching method for use in LTE technique

A smooth switching and technical technology, applied in the direction of electrical components, radio/induction link selection arrangement, selection device, etc., can solve the problems of large data transmission delay, poor service experience quality, data loss, etc., to reduce the delay, Reduce the chance of retransmission, smooth and stable switching effect

Inactive Publication Date: 2007-04-18
HUAWEI TECH CO LTD
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Problems solved by technology

For the Acknowledged Transmission Mode (AM) of RLC, the lost data can be compensated by RLC layer retransmission, but this will cause a large amount of RLC layer data transmission, and even cause a large amount of server layer data transmission due to server layer retransmission , so that the data transmission delay is very large when the user switches between cells; and for the RLC layer transmission mode of UM, since there is no RLC layer retransmission function, it will directly lead to data loss, making the user's service experience poor.

Method used

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  • Smooth switching method for use in LTE technique
  • Smooth switching method for use in LTE technique
  • Smooth switching method for use in LTE technique

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Embodiment Construction

[0052] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0053] The main idea of ​​the present invention is that before the handover, the upper layer network node that controls the handover of the terminal sends the same data to the base station corresponding to the handover-related cell; the base station that receives the data sends the received data to a preset temporary buffer for Caching; after the handover is completed, the target base station ends the process after sending the data in the temporary buffer, thus ensuring that the data cached for the terminal in the base station will not be lost during the handover process, and smooth and stable handover is ensured

[0054] The aforementioned handover-related cells may be only the handover target cell and the source cell, or may be all the cells in the active set of ...

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Abstract

The invention discloses a smooth switching method in LTE technique, comprising: before terminal switching, upper layer network node transmits the same data to a base station corresponding to the cell related with the terminal switching; the base station sends the received data to a preset temporary buffer memory; after switching is completed, a target base station sends the data in the temporary buffer memory. And it prevents the loss of the data in base station for terminal in the hard switching course and assures smooth and stable switching.

Description

technical field [0001] The present invention relates to the technical field of wireless communication system service transmission, in particular to a smooth handover method in Long Term Evolution (LTE) technology. Background technique [0002] In a wireless communication system, because the user has mobility, the system needs to support the handover of the user between different base stations. In the WCMDA system, a key technology introduced is soft handover. The UE measures the signal quality of the CPICH channel of the adjacent cell, establishes and maintains a DCH active set according to the measurement result, and maintains a soft handover connection with the cell in the DCH active set to maintain data transmission. The cells in the active set may belong to the same base station or different base stations. The GSM system in the second-generation mobile communication can only perform hard handover between different base station cells. Compared with soft handover, the sm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04W36/02H04W36/08
Inventor 邵飞
Owner HUAWEI TECH CO LTD
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