Heterogeneous wireless network access control and resource distribution joint method based on multiple services

Abstract

The invention discloses a heterogeneous wireless network access control and resource distribution joint method based on multiple services, wherein the method includes: firstly, system throughput capacity and user fairness are taken into consideration comprehensively; a system optimization target function is designed for time-delay sensitive services and an optimization problem is resolved into two sub-problems of access control and resource distribution, wherein the resource distribution is completed by each base station; and then an indirect coordinator is arranged on a macro base station and according to the resource distribution result of each base station, access network selection of a user is adjusted. On the premise that the service quality of users of different service types is ensured, the heterogeneous wireless network access control and resource distribution joint method based on the multiple services is capable of solving a problem of load balance between the macro base station and household cells and between the household cells, improving the throughput capacity of the whole network and effectively reducing algorithm complexity; and the method is applicable to a downlink of a heterogeneous wireless network in which the macro base station and the household base stations coexist.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, is applied to the downlink of a heterogeneous wireless network environment where a macro cell and a home cell coexist, and relates to an access control technology and a resource allocation technology of an LTE heterogeneous wireless network, which can satisfy user quality of service (QoS ) demand, and can improve the throughput of the whole system. Background technique [0002] In order to meet the increasing data transmission requirements of users and increase the total capacity of the cell network, especially to improve the communication quality of users in hotspot cells, operators have added home cells within the coverage of macro cells. The home cell can spatially multiplex the frequency spectrum, so users in the overlapping area of ​​the macro cell and the home cell can choose the home base station to transmit data, which can enable the user to obtain better channel quality, g...

AI Technical Summary

Problems solved by technology

However, most of the research scenarios of resource allocation technology only consider a single base station, which is not in line with today's real heterogeneous wireless network environment

For example, Nan Zhou et al. proposed a low-complexity adaptive cross-layer scheduling resource allocation algorithm in IEEE Transactions on wireless communication, 2010 "Low Complexity Cross-Layer Design with Packet Dependent Scheduling for Heterogeneous Traffic in Multiuser OFDM Systems". The user quality of service (QoS) requirements of different business types are considered, but the heterogeneity of this method is only reflected in the different business types, and cannot reflect the different cell types in heterogeneous networks, so there is no research on access network selection technology

However, most studies on user access network selection control technology often ignore the guarantee of user quality of service (QoS), such as Mingyi Hong et al. in IEEE Journal On Selected Areas In Communications, 2012 "Mechanism Design for Base Station Association and Resource Allocation in Downlink "OFDMA Network" combines resource allocation and access control to improve system throughput, but this method does not consider the interference between base stations and the different types of user services, and cannot guarantee user quality of service (QoS) requirements

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