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LTE system soft handoff mechanism

A soft handover and mechanism technology, applied in the field of communication, can solve problems such as inability to send and receive data, increase data transmission delay, etc.

Inactive Publication Date: 2020-02-11
JIANGSU JIUXIN COPPER IND
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Problems solved by technology

[0002] The existing handover method of LTE (Long Term Evolution, long-term evolution) is hard handover, that is, the UE (User Equipment, user equipment) first disconnects the connection with the source BS (Base Station, base station), and then establishes a connection with the target BS. There is a period of time during the handover process, during which the UE is neither connected to the source BS nor the target BS, and cannot send and receive data, thus increasing the data transmission delay

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Embodiment Construction

[0022] Existing LTE handovers are all hard handovers. During the handover process, there is a time period during which the UE is neither connected to the source BS nor the target BS, and cannot send and receive data, thus increasing the data transmission delay. The present invention designs a soft handover mechanism by utilizing the partial frequency multiplexing technology, so as to reduce the data transmission time delay of the UE in the handover process.

[0023] In the case of using partial frequency reuse to plan the frequency of the cell, if the UE is handed over at the edge of the cell, the frequency bands of the adjacent cells do not overlap, such as image 3 shown. On the basis of this analysis, the present invention finds that the soft handover of UE between cells can be realized by designing a new method, thereby reducing the data transmission delay problem caused by hard handover.

[0024] The invention relates to a soft handover mechanism of an LTE system. In the...

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Abstract

According to the LTE system soft handoff mechanism, under the condition that partial frequency reuse is used for planning cell frequency, user equipment UE achieves base station switching between cells through the soft switching mechanism. According to the invention, the UE is always connected with only one BS in the switching process; an interruption period like a hard switching mechanism does not exist, and a connection overlapping period of an existing soft switching mechanism does not exist, so that on one hand, the data transmission time delay of the UE in the switching process is reduced, on the other hand, no pressure is brought to terminal processing capacity and equipment devices, and resources are not occupied repeatedly.

Description

technical field [0001] The invention belongs to the technical field of communication, relates to a method for switching a communication terminal in a cellular network, and is an LTE system soft switching mechanism. Background technique [0002] The existing handover method of LTE (Long Term Evolution, long-term evolution) is hard handover, that is, the UE (User Equipment, user equipment) first disconnects the connection with the source BS (Base Station, base station), and then establishes a connection with the target BS. There is a time period during the handover process, during which the UE is neither connected to the source BS nor the target BS, and cannot send and receive data, thus increasing the data transmission delay. [0003] Soft handover means that the UE first establishes a connection with the target BS, and then disconnects the connection with the source BS. During the handover process, the connection between the UE and the BS is always maintained, thereby reduci...

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Application Information

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IPC IPC(8): H04W36/18H04W36/08H04W36/00H04W74/08
CPCH04W36/0011H04W36/08H04W36/18H04W74/0833
Inventor 钱骅许哲吴龙波丁俊涛刘俊龙
Owner JIANGSU JIUXIN COPPER IND
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