PCI (physical cell identification) allocation method suitable for low-speed MR (mobile relay)

Abstract

The invention relates to a PCI allocation method suitable for a low-speed MR, and belongs to the field of wireless communication. The method comprises the steps as follows: a PCI allocation detection list is configured and maintained at a macro base station terminal of each cell, and a state information list is configured and maintained at each MR terminal simultaneously; the MR determines an access cell B according to cell selection norm and performs signaling interaction with a macro base station of the target cell B, so that the cell switching is finished; the macro base station of the cell B performs matching search on PCI of the MR and a PCI allocation detection list managed by the macro base station of the cell B, and whether collision exists is detected; the MR performs PCI screening by utilizing the obtained allocation detection list managed by the macro base station of the cell B and the state information list, and performs priority ranking; M (M is equal to 1) PCIs with highest priority ranking are selected to be reported to the macro base station of the cell B; the PCIs are reallocated for the MR by the macro base station of the cell B according to the PCIs reported by the MR; and the MR and the macro base station of the cell B perform information updating correspondingly. With the adoption of the PCI allocation method suitable for the low-speed MR, the problems of PCI collision and confusion caused when the MR moves in multiple cells at a lower speed can be effectively solved, and the replacement times of the PCIs are reduced.

Description

technical field [0001] The invention belongs to the field of wireless communication, in particular to a PCI allocation method for MR, which is oriented to future mobile communication networks. technical background [0002] With the rapid popularization of smartphones, wireless data is growing explosively, and the demand for network capacity has increased significantly. Although a single-layer network composed of macro base stations can provide better coverage, it is difficult to solve the problem of greatly increasing network capacity. In order to cope with the growing data demand, more low-power nodes need to be introduced into the network to form multi-layer Network is an inevitable trend in the development of mobile communication systems in the future. [0003] Currently introduced low-power nodes include remote radio (RRH), pico base station (Pico), home base station (HeNB), and relay (Relay). The backhaul link of the relay is wireless, so the deployment is flexible an...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of the PCI allocation scheme of the mobile relay, and propose a method for assigning physical cell identifiers suitable for low-speed mobile relays, which can effectively solve the problem of PCI allocation when the mobile relay moves in multiple cells at a lower speed. Conflict and confusion problems, PCI with low conflict probability can be preferred during use, effectively reducing the number of PCI replacements

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