负载均衡的多接入选择算法

针对异构无线分组网络进行多接入选择方法设计时，仅考虑已接入用户数及系统容量将存在缺陷的问题，提出了一种新的异构无线分组网络中的接入选择算法，在多接入选择时考虑了分组业务QoS和链路自适应机制（(链路层重传及自适应调制）)因素，来正确估计分组业务在接入后平均消耗的资源量以及分组网络当前的负载情况。最后对算法性能进行了仿真评估，并与传统多接入选择方法进行了比较，结果表明提出的算法优于传统多接入选择算法，能在保证分组业务QoS的基础上，同时达到不同网络间负载均衡的目的。

Load Balancing-Based Multi-Radio Access Selection Algorithm

The design of multi-radio access selection simply according to the number of accessed users and the system capacity(MRAS) is not accurate for the wireless packet networks. A novel multi-radio access selection algorithm in heterogeneous wireless packet networks is proposed, in which the effect of link adaptive technology (including MAC retransmission and adaptive modulation) is considered together with the requirement of quality of packet service, in order to evaluate the resource requirement of packet service and network load status. The dynamic simulation is implemented to evaluate the performance of the proposed algorithm compared with traditional minimum accessed user and minimum path loss MRAS schemes,. The results reveal that the proposed MRAS algorithm performs better than those schemes in terms of QoS guarantee and load balancing.