Method and system for reducing unnecessary switching in LTE (Long Term Evolution) system

A necessary and cell handover technology, applied in electrical components, wireless communications, etc., to solve the problems of unoptimized handover parameters, unnecessary handover, and unreasonable configuration of handover parameters between cells

Active Publication Date: 2011-09-21
深圳市中兴通讯技术服务有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the main purpose of the present invention is to provide a method and system for reducing unnecessary handover in an LTE system, which is used to solve the problem of unnecessary handover due to unreasonable configuration of inter-cell handover parameters or unoptimized handover parameters. technical problem

Method used

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  • Method and system for reducing unnecessary switching in LTE (Long Term Evolution) system
  • Method and system for reducing unnecessary switching in LTE (Long Term Evolution) system
  • Method and system for reducing unnecessary switching in LTE (Long Term Evolution) system

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Embodiment 1

[0032] Embodiment 1: scheme one

[0033] Such as figure 1 , when the base station B detects a certain number of unnecessary handovers, that is, the mobile terminal is handed over from cell A to cell B, and then quickly handed over to cell C after the handover is successful. First adjust the cell handover parameters of cell B and cell C. If the number of unnecessary handovers is still not reduced after the adjustment, base station B requests base station A to send a measurement report message. After that, base station A includes the relevant measurement report of the user in the handover request. . Base station B judges whether to accept the handover request according to the handover request message sent by base station A, if it accepts the handover request, it returns a handover request confirmation message, if it does not accept the handover request, it returns a handover request failure message, and in the handover request failure message Contains information about recommend...

Embodiment 2

[0062] Embodiment 2: scheme two

[0063] by figure 2 and image 3 For example, when cell handover parameters are adjusted in cell B and cell C, the base station decides whether to send the corresponding cell handover parameters to a public neighboring base station (for example, the control base station of cell A) according to the adjustment direction of the cell handover parameters. For example, if base station B finds that the handover threshold from cell B to cell C has been lowered, it can predict that the mobile terminal in cell A, which is a common neighbor cell of cell B and cell C, is likely to handover successfully when handing over to cell B. Afterwards, it is quickly switched to cell C, so base station B sends to base station A the handover threshold from cell B to cell C. The base station A may determine the target cell of the handover user according to the handover threshold from the cell B to the cell C. Base station B can judge whether base station A continue...

Embodiment 3

[0081] image 3 It is the method processing flowchart of the embodiment of the present invention 3, and concrete steps are as follows:

[0082] Step 301, base station B and base station C initiate handover threshold negotiation to adjust Tbc and Tcb;

[0083] In step 302, base station B and base station C determine whether unnecessary handover will occur according to their adjusted handover thresholds. That is, base station B judges whether it is possible to switch from cell A to cell B and then immediately to cell C according to Tbc, and base station C judges whether it is possible to switch from cell A to cell C and then immediately to cell B according to Tcb;

[0084] Step 303, assuming that base station B determines that unnecessary handover may occur (for example, Tbc is adjusted down to a certain threshold), base station B sends a message referring to the handover threshold to base station A, and the message includes the ECGI of the handover source cell, that is, the EC...

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Abstract

The invention discloses a method and system for reducing unnecessary switching in an LTE (Long Term Evolution) system, which are used for solving the technical problem of generating unnecessary switching between cells. In the invention, a switching request transmitted to a third base station that initiates switching to a first base station which detects the unnecessary switching carries a measuring report; the first base station judges whether the switching is accepted or not according to the measuring report and a cell switching parameter between the first base station and a second base station; and a target cell is recommended while the switching is not accepted. Or the first base station and / or the second base station judges whether the unnecessary switching is generated or not according to an adjusting direction of the cell switching parameter after the cell switching parameter of the first base station and the second base station is adjusted; and if the unnecessary switching is generated, the cell switching parameter is transmitted to a common neighbor third base station; and the third base station selects a switched target cell for a mobile terminal according to the cell switching parameter between the first base station and the second base station. According to the invention, the necessary switching frequency between the cells can be reduced and the consumption of network resources is avoided.

Description

technical field [0001] The present invention relates to a wireless cellular communication system, and in particular to a method and system for reducing unnecessary handover of a mobile terminal between cells in a Long Term Evolution (LTE) mobile communication system. Background technique [0002] The 3GPP protocol version 36300-800 describes that the LTE network is composed of an E-UTRAN (Evolved UTRAN) base station (Evolved NodeB, eNB) and an evolved packet switching center (Evolved Packet Core, EPC), and the network is flat. The EUTRAN includes a set of eNBs connected to the EPC through the S1 interface, and the eNBs can be connected through the X2. S1 and X2 are logical interfaces. One EPC can manage one or more eNBs, one eNB can also be controlled by multiple EPCs, and one eNB can manage one or more cells. [0003] Self-Organizing Network (SON) is a technology for automatic network configuration and optimization. The feature of this technology is self-configuration an...

Claims

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Application Information

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IPC IPC(8): H04W24/08H04W24/10H04W36/08H04W36/30
Inventor 方建民韩立锋和峰郑小盈张健魏珍珍
Owner 深圳市中兴通讯技术服务有限责任公司
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