Cognition-based macro eNB and femtocell interference management method

Abstract

The invention discloses a cognition-based macro eNB and femtocell interference management method. A chance interference avoidance method and a Gale-Shapley frequency spectrum sharing method are combined. In the chance interference avoidance method, a femtocell acquires free frequency spectrum resources in a macro eNB network or available time-frequency resource blocks in orthogonal frequency division multiplexing through detection. In the G-S frequency spectrum sharing method, a one-to-one frequency spectrum resource distribution strategy is adopted in the femtocell, communication is carried out through obtained frequency spectrum resource holes, in the communication process, the femtocell periodically monitors the occupancy state of the frequency spectrum resources, and once a macro eNB user occupies frequency spectrum resource blocks, the femtocell stops communication. Compared with existing partial frequency spectrum resource sharing schemes, the method has many advantages, for example, the existing schemes are low in spectrum efficiency and cannot eliminate in-layer interference, the method of detecting macro eNB behaviors is adopted in the scheme, more resources can be sensed, and the spectrum efficiency is high; meanwhile, the in-layer interference is eliminated by combining the G-S theory.

Description

technical field [0001] The present invention belongs to the technical field of communication, and more specifically relates to a method for managing interference between a macro base station and a home base station based on cognition. Background technique [0002] In order to solve the problems of macro base station network coverage blind spots and indoor high-speed wireless coverage, a home base station network (Femtocell) technology is proposed in the LTE-Advanced system. [0003] Femtocells provide an effective solution for high-speed indoor wireless communication coverage. A Femtocell Access Point (FAP) is a small, low-cost, low-power, short-distance, plug-and-play wireless access device placed in a home or office. Femtocells can increase system capacity by improving link quality, and use spectrum reuse technology to expand network coverage. In the home base station network, shortening the communication distance can increase the link rate, and reducing the link loss ca...

AI Technical Summary

Problems solved by technology

[0009] (1) Part of the spectrum resource sharing scheme only solves the interlayer interference, but because a part of the spectrum is specially allocated to the macro base station, the efficiency of spectrum reuse is not high

[0010] (2) Femtocell grouping adds intra-layer interference cancellation technology on the basis of part of the spectrum resource sharing scheme, but how to group and coordinate increases the complexity

But the frequency reuse factor is no longer 1, and the location information of macro users is not fully utilized, and the spectrum utilization efficiency needs to be further improved

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