异构无线分组网络中的接入选择机制

传统多接入选择(Multi-Radio Access Selection)方法只针对话音业务,在设计中仅仅考虑已接入用户数及系统容量,由于未将"分组级"信息考虑在内而不适用于无线分组网络。提出了一种新的异构无线分组网络中的接入选择算法,分组业务在多接入选择时考虑了实时、非实时的不同QoS要求和链路自适应机制(链路层重传及自适应调制编码);用户接入后,在保证其QoS的基础上,同时达到不同网络间负载均衡的目的。基于OPNET Modeler的动态仿真对算法性能进行了仿真评估,并与传统的最小用户数和最小路径损耗多接入选择方法在保证业务QoS和负载均衡性能方面进行了比较。

Radio Access Selection Algorithm in Heterogeneous Wireless Packet Networks

Existing multi-radio access selection (MRAS) algorithms, which are designed for traditional voice service according to the number of accessed users and the system capacity, are not adapt to the wireless packet networks. A novel multi-radio access selection algorithm in heterogeneous wireless packet networks was proposed, in which the effect of link adaptive technology was considered together with the requirement of quality of packet service and network available resource. The algorithm aimed at guaranteeing the quality of accessed service as well as load balancing. The dynamic simulation was implemented to evaluate the performance of the proposed algorithm compared with traditional minimum accessed user and minimum path loss MRAS schemes, in terms of QoS guarantee and load balancing.