Partial frequency reuse-based spectrum flexible allocation method in long term evolution (LTE) heterogeneous network

Abstract

The present invention discloses a partial frequency reuse-based spectrum flexible allocation method in a long term evolution (LTE) heterogeneous network. In the method, a covered macro cell is divided into a center region and an edge region divided into N regions; one sub-frequency band is allocated to a macro user in the center region, and N sub-frequency bands are allocated to a macro user in the edge region; a home base station assigns an initial value TM for a time invoking spectrum allocation information, and timing starts; whether a value TM of the timer is 0 is determined; if the value of the timer is not 0, partial frequency multiplexing algorithms based on a spectrum database are invoked; and if the value of the time is 0, it is indicated that the partial frequency multiplexing algorithms based on the spectrum database fail in running, and partial frequency multiplexing algorithms based on spectrum sensing are invoked. Through adoption of the method, inference in a cell and among cells is effectively suppressed, spectrum efficiency of each cell and throughput of the user at the cell edge are improved, base station maintenance workload and base station construction investment are reduced, and the adaptability of the base station to the environment is enhanced.

Description

technical field [0001] The present invention relates to the technical field of LTE heterogeneous network, in particular to a flexible frequency spectrum allocation method based on partial frequency multiplexing under the LTE heterogeneous network. Background technique [0002] LTE (Long Term Evolution, long-term evolution) is the long-term evolution of the third-generation mobile communication technology standard formulated by 3GPP. The maturity and application of LTE technology provides more possibilities for the improvement of mobile communication performance. [0003] With the continuous development of mobile communication technology, the unevenness of service distribution has become more and more obvious. Most of the communication traffic is concentrated in indoor and outdoor hotspots. The traditional homogeneous network can no longer meet people's needs. Therefore, Heterogeneous network technology has been widely used. The heterogeneous network architecture refers to t...

AI Technical Summary

Problems solved by technology

However, due to the introduction of low-power nodes, the interference in the heterogeneous network is not only the interference between the adjacent cell base stations, but also the interference between the macro base station and the micro base station in the same cell, and the interference in the network becomes more complicated.

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