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Method for identifying missed neighbor cell of service cell in LTE (long term evolution) system

A technology of serving cells and identification methods, applied in electrical components, wireless communication and other directions, can solve the problem of low reliability of ANR

Active Publication Date: 2015-04-29
DINGLI COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the data processing output results of the LTE live network, many missing configuration neighbors that must be added were found, and it was verified that the neighbors must be added. The results fully show that the reliability of ANR is not high.

Method used

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  • Method for identifying missed neighbor cell of service cell in LTE (long term evolution) system
  • Method for identifying missed neighbor cell of service cell in LTE (long term evolution) system

Examples

Experimental program
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Embodiment 1

[0023] In the present invention, PCI, CI and MR are common terms in LTE technology. PCI (physical-layer Cell identity) is composed of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), which can be obtained through simple calculations. The formula is as follows: PCI=PSS+3*SSS, where the value of PSS is 0...2 (actually 3 different PSS sequences), the value of SSS is 0...167 (actually 168 different SSS sequences), Using the above formula, the range of PCI can be obtained from 0...503, so there are 504 PCIs in the physical layer. CI (Cell Identity) uniquely identifies a cell and cannot be repeated in the network. MR stands for Measurement Report, which is a method for collecting network optimization measurement data by using ordinary mobile phones and data cards.

[0024] The handover measurement of LTE has an obvious feature, that is, its measurement is based on the frequency point rather than the neighbor cell list. The UE measures the cell...

Embodiment 2

[0035] For concretely describing the present invention, refer to figure 2 As shown, the present invention uses specific examples to describe the above-mentioned method in detail. exist figure 2 Among them, the PCI of the S serving cell is 6, and the cell database is configured with a total of 4 neighboring cells N1-N4, and their PCIs are 5, 8, 7, and 11 respectively. When the fourth neighboring cell N4 is used as the serving cell, only one Neighboring cell N41, PCI is 12, when N41 is used as the serving cell, only one neighboring cell N411, PCI 10 is configured, and when N411, PCI 10 is used as the serving cell, a neighboring cell Nx is also configured, and Nx is a missing configuration adjacent cell , PCI is 4. With the continuous expansion of the system scale and the negligence of the planners, it is suspected that Nx is missing to configure adjacent cells.

[0036] The measurement report of the mobile phone can be periodic or event-triggered. If the UE reports a measur...

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Abstract

The invention discloses a method for identifying a missed neighbor cell of a service cell in a LTE (long term evolution) system. The method comprises the following steps: for each MR (measurement report) reported to UE (user equipment), recording the MR if the MR contains a PCI (physical-layer cell identity) which is not configured in a neighbor cell table of the service cell; searching for a target cell corresponding to the PCI in the neighbor cell table of all neighbor cells of the service cell when the MR accumulated in a same scene achieves a recording limit value, if the target cell is found, backfilling a CI (cell identity) of the target cell to the CI of the missed neighbor cell, if the target cell is not found, taking the neighbor cell of these neighbor cells as the service cell, looking for the neighbor cell table of these neighbor cells from the next-stage neighbor cells to judge whether the corresponding target cell is contained in the neighbor cell table or not, if the target cell is found, backfilling the CI of the target cell to the CI of the missed neighbor cell and if the target cell is not found, searching the CI of the PCI in the whole network range, and backfilling the CI of the nearest target cell to the CI of the non-configured neighbor cell according to the principle of proximity. The method disclosed by the invention can accurately identify the unknown neighbor cell.

Description

technical field [0001] The invention relates to the field of radio communication, in particular to a method for identifying adjacent cells that are missing from a serving cell in an LTE system. Background technique [0002] The handover measurement of LTE has an obvious feature, that is, its measurement is based on the frequency point rather than the neighbor cell list. The UE measures the cell using the frequency point according to the frequency point indicated by the measurement configuration, and then the high layer of the UE processes the measurement result, obtains a handover candidate list and sends it to the network, and the network selects a cell (according to the neighbor cell list) to initiate handover. However, the neighbor cells not configured in the neighbor cell list (frequency point + PCI, PCI is the physical cell ID physical layer cell identification number) will become the neighbor cells that the system omits to configure. Form a switch. [0003] The SON (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/02
CPCH04W24/02
Inventor 杨永宁喻大发王耘陆金红
Owner DINGLI COMM