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District switching method in long-term evolution system

A long-term evolution system and cell handover technology, which is applied in the direction of electrical components, wireless communication, and communication between multiple stations, can solve problems such as call drop and cell no longer handover, so as to increase the chance of handover and shorten the time The time for switching preparations and the effect of improving the success rate of switching

Inactive Publication Date: 2009-11-25
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to provide a cell handover method in an LTE system, which solves the problem in the prior art that no more handover may result in call drop after cell handover fails

Method used

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  • District switching method in long-term evolution system
  • District switching method in long-term evolution system
  • District switching method in long-term evolution system

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Embodiment Construction

[0032] Aiming at the problem that the handover cannot be carried out smoothly due to reasons such as too high load of the target cell, which leads to call drop, the present invention expands the handover preparation failure message to bring back the information of the candidate cell that can be handed over again, so that the source base station can make a handover decision again For reference; if the source base station judges that the candidate cell satisfies certain conditions, it will initiate a handover attempt again.

[0033] The main idea of ​​the present invention is to allow the base station where the target cell is located to participate as much as possible when the source base station makes a handover decision, and the two parties cooperate to jointly select a suitable handover target cell to improve the success rate of handover.

[0034] To achieve the above object, the present invention provides following method:

[0035] Step 10, the source base station receives t...

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Abstract

The invention provides a district switching method in a long-term evolution system, which comprises the following steps: a source base station receives a measuring report reported by a terminal, and then, the source base station makes a switching decision and sends a switching preparation request to a destination base station; after receiving the switching preparation request, the destination base station selects a candidate district for resource allocation failure in a destination district to a user and sends a switching preparation failing message to the source base station, wherein the message carries information of the candidate district; and after receiving the switching preparation failing message, the source base station makes a switching decision again according to the information of the candidate district in the message. The district switching method in the long-term evolution system can be used for starting a switching attempt again under the condition that the first switching preparation fails, thereby increasing the opportunity of the switching, shortening the time for the second switching preparation, reducing the outage probability caused by unsuccessful switching, and greatly improving the successful rate of the switching of the whole system.

Description

technical field [0001] The present invention relates to a wireless communication system, specifically, it is a mobile communication system long-term evolution (Long Term Evolution, referred to as LTE) framework proposed by the 3rd Generation Partnership Project (The 3rd Generation Partnership Project, referred to as 3GPP) Cell handover method. Background technique [0002] With the rapid development of wireless communication technology, the requirements for the access system are getting higher and higher, hoping to provide higher transmission rate and lower transmission delay. For this reason, 3GPP proposed the long-term evolution of mobile communication system LTE project . Under the LTE architecture, the network consists of an Evolved Universal Terrestrial Radio Access Network (Evolved UTRAN, E-UTRAN for short) and an Evolved Packet Core (EPC for short). The E-UTRAN includes one or more evolved base stations (E-UTRAN Node B, eNB for short). The E-UTRAN and the EPC are c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/08H04B7/26
Inventor 李魁
Owner ZTE CORP
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