Peripheral component interconnect (PCI) reassortment method

A base station and reference signal technology, which is applied in the field of physical cell identification reconfiguration, can solve the problems of poor user perception and unpredictable time when users naturally drop calls, and achieves the effect of improving user experience and reducing the call drop rate of users.

Inactive Publication Date: 2013-03-20
POTEVIO INFORMATION TECH CO LTD
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Problems solved by technology

[0014] In the prior art, there are the following disadvantages: it only prevents new users from accessing, and waits for the user to drop the call naturally. The time for the user to drop the call naturally is unpredictable. After the timer expires, the user will be forced to drop the call, and the user perception is too poor

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  • Peripheral component interconnect (PCI) reassortment method

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Embodiment Construction

[0031] The core idea of ​​the present invention is to introduce a method of reducing the downlink transmission energy (EPRE) of each RE of the downlink reference signal (RS) when the cell modifies the PCI of the cell, triggering the handover of online users to neighboring cells, and avoiding the access of new users to this cell to reduce the call drop rate and access failure rate of users in the operating cell.

[0032] In the embodiment of the present invention, reducing the power of the reference signal may be implemented through a cell reconfiguration process.

[0033] When the base station receives a request to modify the PCI preparation of the cell, the base station reduces the EPRE of the downlink RS of the cell to the minimum value EPRE min , while saving the EPRE of RS before the power drop as EPRE old , and then perform reconfiguration processing on the cell. However, the strength of the UE in this cell to measure the RSRP of this cell will be significantly reduced....

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Abstract

The invention provides a physics cell identity peripheral component interconnect (PCI) reassortment method which comprises the following steps: A, a base station receives PCI reassortment preparation message from operational management system (OM) so as to forbid a new user to access and to reduce downward emitted energy per resource element (EPRE) of a downward reference signal; B, user equipment (UE) detects the variation of a serving cell and reports detection reports to the base station and then is switched to an adjacent cell; C, when a timer of the OM is time-out and a PCI is reassigned to the cell, the cell delete indication is sent to the base station to demand for deleting the prior cell, and then the base station executes the operation of deleting the prior cell; and D, the OM sends a cell building indication carrying the reassigned PCI to the base station to demand for building a new cell, and then the base station restores the EPRE of the downward reference signal to a normal value and builds the new cell.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a physical cell identity (PCI) reconfiguration method. Background technique [0002] The Physical Cell Identity (PCI) is an identifier of the physical layer, a key parameter for determining the scrambling code of a cell, and a basic parameter for establishing a cell. PCI is a unique combination of an orthogonal sequence and a pseudo-random sequence, and its value range is 0-503. When a new base station (eNodeB) accesses the network and establishes a cell, an appropriate PCI value must be selected and the following three conditions must be met: [0003] 1. Collision-free: the PCI values ​​of the serving cell and its neighboring cells cannot be repeated; [0004] 2. Confusion-free: PCI values ​​between all adjacent cells of the serving cell cannot be repeated; [0005] 3. Reference signal interference minimum (Interference-minimum): Since the PCI value is related to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/00H04W24/10H04W36/08H04W72/04
Inventor 张燕宋明威
Owner POTEVIO INFORMATION TECH CO LTD
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