Interference Coordination Method and Heterogeneous Network Communication System Based on Hybrid Resource Allocation

Abstract

The present invention discloses an interference coordination method based on hybrid resource allocation and a heterogeneous network communication system, wherein the method includes: MeNB acquires initial PRB allocation information, uses the available PRB information and limited PRB information of the interfered MUE, and transmits information to each interfering HeNB Update the available PRB information and restricted PRB information of each HUE, and update the available PRB information and restricted PRB information of the MeNB according to the updated first HeNB resource list of each interfering HeNB to obtain the first MeNB resource list; obtain the available information of each HUE PRB information and limited PRB information and update the first MeNB resource list accordingly, and use the updated second MeNB resource list to update the first HeNB resource list of each HeNB, according to the obtained second HeNB resource of each HeNB The list and the second MeNB resource list re-allocate PRBs for the MeNB and each HeNB. The embodiment of the present invention can reduce the downlink interference in the heterogeneous network system, and improve the throughput of the heterogeneous network system.

Description

technical field [0001] The present invention relates to communication technology, in particular to an Interference Coordination Based on Hybrid Resource Allocation (Interference Coordination Based on Hybrid Resource Allocation, hereinafter referred to as: ICHRA) method and a heterogeneous network communication system. Background technique [0002] In order to increase the capacity of the communication system, enhance network coverage, and improve spectrum efficiency, the communication system can be deployed in a heterogeneous network manner. In a long term evolution system (Long Term Evolution, hereinafter referred to as: LTE) heterogeneous network, a home base station (Home eNB, hereinafter referred to as: HeNB) or a home base station (HeNB) is placed within the coverage of a macro base station (Macro eNB, hereinafter referred to as MeNB). An access point such as a Femto eNB (hereinafter referred to as FeNB), these HeNB base stations may access the LTE network in a wired or...

AI Technical Summary

Problems solved by technology

[0008] Since the coverage of HeNB is mainly in the home and office environment, and it is plug-and-play type, the distribution of HeNB and the HUE served by HeNB is time-varying and uneven, which is mainly manifested in the following aspects: In the home and office environment , the number of users changes significantly with time, resulting in the ratio between the number of HUEs served by HeNB and the number of MUEs in the HeNB serving cell changes with time; HeNB is plug and play for users, which causes the network structure of HeNB to change with time, which further causes Changes in the interference scene in the serving cell; the distribution of HeNBs in the coverage area of ​​their MeNBs is often uneven, and the surrounding geographical environment is complex, resulting in the unevenness of the wireless propagation environment around the home and office environment, that is, the channel environment, and interference Inhomogeneity of the scene

[0009] In the process of realizing the present invention, the inventors found that although the existing method of sharing channel configuration between MeNB and HeNB can improve the average spectrum utilization rate of the communication system to a certain extent, there are at least the following problems: allocation based on fixed frequency bands The method allocates fixed frequency resources for MeNB and HeNB, and the MeNB and the HeNB within the coverage of the MeNB each occupy continuous frequency band resources, which cannot adapt to the time-varying and uneven distribution of the HeNB and the HUEs it serves, resulting in the loss of some resources. Waste, which reduces the spectrum resource utilization of the LTE heterogeneous network system, and the downlink interference in the LTE heterogeneous network system is serious, thereby reducing the throughput of the LTE heterogeneous network system

However, due to the heterogeneity of the channel environment, it is very likely that the channel quality of the PRBs allocated to HeNBs is not good, while the PRBs with good channel quality do not belong to the scope of resource sharing; at the same time, some PRBs allocated to non-MeNBs may be harmful to many HeNBs. service users cause strong interference, but are continuously used by MeNB, thus affecting the overall channel quality of the communication system

In addition, the value of α directly affects the throughput of the entire cell in the heterogeneous network. However, according to some shared channel configuration methods, the fixed value of α cannot adapt to the change in the ratio β between the number of MUEs and the number of HeNBs. Once α is set to If the value does not match β, it will cause unbalanced communication system load and waste of some resources, thereby reducing the throughput of the entire cell

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