User access method under macro cell and small cell heterogeneous network

Abstract

The invention discloses a user access method under a macro cell and small cell heterogeneous network, and belongs to the field of communication. According to the user access method under the macro cell and small cell heterogeneous network, users to have access have three kinds of selectable access modes, except for a traditional small cell mode and a traditional macro cell mode, a D2D relay mode further exits, and under a certain condition, the users to have the access outside a small cell coverage range are made to build D2D relay chains with small cell users as relays through the channels of users repeatedly using a macro cell to access small base stations. A D2D relay technology is adopted to help the users outside the small cell coverage range to access the small base stations, the users outside the small cell coverage range can access the small base stations, the service range of a small cell can be enlarged without increasing the number of the small base stations.

Description

technical field [0001] The invention relates to the communication field, in particular to a user access method in a heterogeneous network where a macrocell and a small cell coexist. Background technique [0002] With the rapid development of wireless communication systems, the existing single network system can no longer meet the communication requirements of high speed, large capacity, and high quality of service. The next generation of wireless communication technology is developing towards the heterogeneous integration of multiple wireless networks. Heterogeneous network refers to the introduction of other communication methods within the coverage of macro base stations to strengthen the coverage of specific areas in a targeted manner to form a network structure with multi-layer coverage. It has flexible network construction and low maintenance costs, so it is popular received widespread attention. [0003] The introduction of small cells into a single macrocellular netw...

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Problems solved by technology

[0005] Aiming at the problem in the prior art that the number of small cells is large in order to improve the coverage of small cells, the present invention provides a user access method under the heterogeneous network of macro cells and small cells, without increasing the number of small cells, Effectively improve the coverage of small cells

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