Apparatus realizing distributed wireless cell and communication method

Abstract

The invention discloses a device and a communication method thereof for achieving a distributed type radio cell. The method comprises the following steps: after being received by a radio frequency remote unit, an uplink signal sent by a mobile terminal is forwarded to a base band unit; after being received by the base band unit, the uplink signal is resolved and synthesized, and sent to a base station controller; the base station controller sends a downlink signal to the base band unit; after being received by the base band unit, the downlink signal is resolved, and then distributed to a plurality of radio frequency remote units; and the radio frequency remote units forward the downlink signal to the mobile terminal through an aerial interface. The invention expands the effective coverage scope of the cell through the distributed type collaboration of the radio frequency unit at the remote end, thereby prolonging the sojourn time of a high speed mobile terminal passing through the cell, improving the measuring and switching effects of the mobile terminal passing through an adjacent cell, improving the communication quality of a mobile user, and satisfying the mobile communication demands on the occasions like express railway lines in a pertinence manner and the like.

Description

technical field [0001] The present invention mainly relates to the field of mobile communication, in particular to a device and a communication method for realizing distributed wireless cells. Background technique [0002] In the field of new-generation communication equipment manufacturing, the remote radio system is gradually attracting attention. Its typical architecture is to divide the base transceiver station (BTS, Base Tranceiver Station) into a baseband unit (BBU, Baseband Unit) and a remote radio unit (RRU, Remote Radio Unit) two parts. [0003] After the RRU and BBU are installed separately, they are connected remotely through optical fibers to provide a basis for distributed network coverage. For example, in some specific occasions, multiple different RRUs are used to transmit the same carrier to form a distributed network coverage. [0004] For the high-speed railways in economically developed areas, although the existing network coverage is very complete, seam...

AI Technical Summary

Problems solved by technology

[0006] First of all, in the process of laying a private network, if you want to increase the network coverage radius of the community, you need to raise the antenna high. However, raising the antenna will have two adverse consequences. First, users who do not belong to the high-speed train can easily switch to the high-speed train. In the private network, the resources of the private network are occupied

Second, since private network planning along the line generally requires breaking away from the adjacency relationship with the existing large mobile communication network, so as to reduce the interval switching with the large network, it is difficult for users who do not belong to the high-speed train to enter from the private network. switch out

[0007] Secondly, when the coverage radius of the cell network increases, the signal strength of the edge area covered by the cell network will inevitably decrease.

Due to the strong shielding effect of high-speed trains, for example, the signal attenuation loss of Bombardier high-speed trains can reach up to 24db. Therefore, when the high-speed train enters the edge of the network coverage of the community, the mobile terminals in the high-speed train may not be able to communicate normally.

[0008] To sum up, the cell network coverage mode under the existing technology can no longer meet the mobile communication needs along the high-speed railway

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