Assignment strategy mechanism for heterogeneous types of mobile users and access points

This paper discusses a various customer heterogeneous server (VCHS) queuing system strategy for the optimal assignment of mobile users to wireless LAN access points (APs) to optimize user quality of service (QoS). The users and APs have heterogeneous types of service requests and services, such as types of service providers, respectively. It is assumed that users arrive in a stochastic manner and that the proportions of user traffic volumes to each service request are provided. The user only connects to an AP that matches the service with the user request. Then, the user leaves after downloading a specific volume of data. A “group” assignment strategy is proposed to match the service resources to the service request demands. The strategy includes how to make a group from a number of APs proportional to the volume of user traffic to each service request. The evaluations show that the “group” assignment strategy is significantly better than a “random” assignment strategy in terms of mean waiting time. The proposed strategy reduces the mean waiting time by 25%, with more significant decreases as the number of APs with more types of services increases.