Femtocell interference suppression method combining with frequency spectrum distribution and power control

Abstract

The invention provides a Femtocell interference suppression method combing with a frequency spectrum distribution and a power control, relates to a Femtocell interference suppression method, and aims to achieve interference suppression between the Femtocell and a macro cellular when the Femetocell and the macro base state adopt a common communication channel configuration or part of the common communication channel configuration. The Femtocell interference suppression method comprises the following steps: firstly, the sensing-based frequency spectrum distribution scheme is used to divide the frequency spectrum into a specific frequency spectrum for the macro cellular and a macro cellular common frequency spectrum for Femtocell; based on Doppler parameter low speed of a reference signal received by a macrocell, the speed of a macro cellular UE (User Experience) around the Femtocell is evaluated; whether the macro cellular user uses the specific frequency spectrum for the macro cellular or not is determined according to the threshold value of the speed; and the used frequency spectrum resource is determined by the reported feedback value of a CQI (Channel Quality Indicator). Meanwhile, the power control means is started when the intensiveness of the Femtocell reaches a certain threshold to evaluate the amount of active Femtocell in each cluster, and the Femtocell initial interference tolerance is set up by broadcast. The invention is suitable for the Femtocell interference suppression.

Description

technical field [0001] The invention relates to a method for interference suppression in Femtocell. Background technique [0002] How to economically and efficiently provide good indoor coverage and high-speed data transmission rate to improve the throughput of the entire network has always been an important problem to be solved in mobile cellular networks. Femtocell, with its unique advantages in this aspect, has been proposed by various mobile networks once it is proposed. Favored by network operators and most equipment manufacturers. [0003] In order to meet higher data transmission rates, LTE-A requires high bandwidth, which means that it needs to operate in high frequency bands in many cases. But the deep fading nature of high-band signals makes it not good news for indoor signal quality. However, the traditional scheme of increasing the transmit power of cell base stations has low returns, and indoor coverage construction is difficult and costly. Therefore, 3GPP be...

AI Technical Summary

Problems solved by technology

[0008] Method 1: Both use the same frequency band, that is, co-channel configuration. Although both can use more frequency resources, there will be greater interference between the two

[0009] Method 2: The two use independent orthogonal frequency bands, that is, independent channel configurations. Although this reduces the interference between the two, it also reduces the spectral efficiency of the system.

Images