MRS (Mobile Relay Station) PCI (physical cell ID) distribution method

An allocation method and re-allocation technology, applied in the direction of electrical components, wireless communication, network data management, etc., can solve the problems of increased PCI allocation delay, inapplicability, and unsuitable application, etc., to reduce processing load and signaling overhead , Avoid PCI collision and save link resources

Inactive Publication Date: 2011-10-12

SHANGHAI RES CENT FOR WIRELESS COMM

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AI-Extracted Technical Summary

Problems solved by technology

[0012] After analysis, such a solution cannot completely avoid PCI collisions, and is not suitable for fast-moving MRS

This is because on the one hand, processing information by OAM (Operation Administration and Maintenance) will increase the PCI allocation delay; on t...

Method used

First, the allocation of PCI is put on the macro base station end, so that the delay caused by OAM dynamic allocation is avoided;

Second, the interaction between the macro base station and its adjacent cell base station list information detects the possible collision of PCI, avoids frequent MRS searches and reports information to its macro base station, simplifies the work of MRS, and saves signaling overhead and backhaul link resources;

The present inv...

Abstract

The invention discloses a MRS (Mobile Relay Station) PCI (physical cell ID) distribution method. The method comprises the following steps: step A, a PCI distribution detection list is configured at the terminal of a macro base station of each cell; step B, information interaction of the PCI distribution detection lists can be carried out between the macro base station of the cell in which the MRS locates and macro base stations of the cells adjacent to the cell in which the MRS locates so as to predict a possible PCI collision caused by the MRS; step C, if a collision is predicted, the macro base station of the cell in which the MRS locates can redistribute a PCI for the MRS to avoid the predictable collision. In the invention, the PCI of the MRS is configured at the terminal of the macro base station to detect the MRS entering in the cell in advance and can be changed in advance if a collision happens, thus avoiding the happening of PCI collision; besides, the invention transfers the work of PCI configured by an OAM (Operation Administration and Maintenance) to the macro base station in which the MRS locates, so the delay brought from the OAM configuration can be avoided; and meanwhile, the monitoring and reporting works of the MRS can be saved, the processing load and the signaling cost of the MRS can be alleviated and the backhaul link resource can be saved.

Application Domain

Network planningNetwork data management

Technology Topic

Cell IDDistribution method +2

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Examples

Experimental program(2)
Effect test(1)

Example Embodiment

[0042] Example one

[0043] This embodiment provides an MRS PCI allocation method, which includes the following steps:

[0044] [Step A] Set up a PCI allocation detection list at the macro base station side of each cell; the PCI allocation detection list includes Table 1, Table 2, and a reclaim table; the Table 1 is used to store the available PCI; the Table 2 is used To store the PCI that is already in use; the recovery table is used to store the spare PCI. The available PCI is a certain number of PCIs randomly selected from the remaining PCIs in the cell in addition to the fixed PCI in the cell and the fixed PCI in the neighboring cell. The table two includes a first module and a second module; the first module is used to store the adjacent cells of this cell and the fixed PCI in this cell, and the PCI stored in this module is static; the second module is used for To store the PCI of the newly introduced site, if the PCI of the newly introduced site conflicts with the PCI in Table 2 of the neighboring cells of the cell, a new PCI needs to be replaced. The spare PCI is the PCI that will be used by the MRS.

[0045] [Step B], the macro base station of the cell to which the MRS belongs and the macro base station of its neighboring cell exchange information on the PCI allocation detection list, thereby predicting the possible PCI collision of the MRS;

[0046] [Step C] If a collision is predicted, the macro base station of the cell to which the MRS belongs will reallocate a PCI for the MRS to avoid a collision that will occur.

[0047] Such as Figure 2-5 As shown, the MRS PCI allocation method further includes the following detailed steps:

[0048] 1) MRS is turned on, and the cell to which the MRS belongs will sequentially allocate a PCI to the MRS from Table 1 under its jurisdiction;

[0049] 2) MRS is handed over from cell A to cell B. After the handover is completed, the macro base station of cell B reports the PCI of the MRS to the neighboring cells of cell B, and the neighboring cells of cell B begin to detect whether this PCI is the same as the PCI in Table 2 have conflict;

[0050] 3) If neighboring cell C finds that the PCI conflicts with the PCI in Table 2 of its own, it will start the preparation process for PCI replacement, and neighboring cell C will feed back relevant information to cell B through the X2 interface, triggering cell B to replace MRS with a new PCI; If cell B has no remaining PCI, it sends a request to its neighboring cell to borrow a new PCI;

[0051] 4) A neighboring cell of cell B or B sequentially allocates a PCI to MRS from its own table 1;

[0052] 5) A neighboring cell of cell B or B stores the copies of the PCI allocated to the MRS in its own recovery table in order to reduce the priority of the PCI allocated to the MRS;

[0053] 6) A neighboring cell of cell B or B updates the PCI allocated to MRS to its own table two;

[0054] 7) If the neighboring cell does not find that the PCI allocated to the MRS conflicts with its own table 2, then it checks whether the PCI in its own table 1 conflicts with the PCI allocated to the MRS, if a neighboring cell finds the allocation If the PCI for the MRS conflicts with its own table 1, the table 1 of the cell deletes the PCI allocated to the MRS from the table 1, and moves it to its own recycling table;

[0055] 8) When the PCI in Table 1 is used up, the recovery table is triggered, and the PCI stored in the recovery table is imported into Table 1.

Example Embodiment

[0056] Example two

[0057] In this embodiment, a high-speed moving train is taken as an example. The MRS PCI collision detection scenario is as follows: figure 1 Shown:

[0058] First, according to the principle of non-conflict PCI between neighboring cells, a PCI list is configured for each macro base station. The list includes three parts: Table 1, Table 2, and Recovery Table.

[0059] Table 1: Store available PCI;

[0060] According to the search of each cell, we can know the macro base stations adjacent to the cell and the fixed PCI in the cell. These PCIs are excluded, and a certain number of PCIs are randomly selected from the remaining PCIs to establish a dedicated PCI list, as shown in Table 1. For the allocation of MRS PCI, the setting must follow the principle of no conflict between the exclusive lists of adjacent cells.

[0061] Table 2: Store PCIs that are already in use;

[0062] The content contained in this list can be divided into two modules for consideration:

[0063] The first module is the adjacent cell of this cell and the fixed PCI in this cell, and the PCI of this module is static;

[0064] The second module is the PCI of the newly introduced site. If this PCI conflicts with the PCI in Table 2 of the neighboring cells of this cell, a new PCI needs to be replaced;

[0065] For example, when a certain MRS is handed over from cell a to cell b, cell b will notify the PCI of this MRS to the neighboring cell, and the neighboring cell will detect whether the PCI conflicts with the table 2 managed by itself. If a certain neighboring cell of cell b When cell c detects a conflict, cell b is notified to allocate a PCI from list one of cell b to the MRS, and the new PCI is updated to table two of cell b. If the PCI introduced in the new site does not conflict with the PCI in the list 2 of each neighboring cell, then this PCI will be put into the list 1 of each neighboring cell for detection. If there is a conflict, then the conflicting neighboring cell d will be detected by the conflicting PCI Move from the list of cell d to the reclaim list for standby to reduce the priority of this PCI allocation.

[0066] Reclaim table: store spare PCI (that is, PCI with low storage allocation priority);

[0067] Such as figure 1 As shown, at a certain moment, MRS1 belonging to cell B is driving towards its neighboring cell A. When MRS1 enters cell A, cell A will report the PCI number of MRS1 to the neighboring cell where cell A is located to detect this PCI Whether there is a conflict with the PCI of the surrounding cells. If a PCI of a certain cell C is found to conflict with the PCI of MRS1, then cell C feeds back detection information to cell A, and cell A re-allocates a non-conflicting PCI for this MRS1.

PUM

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Classification and recommendation of technical efficacy words

avoid delay

MRS (Mobile Relay Station) PCI (physical cell ID) distribution method

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

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Examples

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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