无线局域网WLANs(Wireless Local Area Network)、通用分组无线服务GPRS(General Packet Radio Service)、通用移动通信系统UMTS(Universal Mobile Telecommunication System)网络都可以为移动用户提供数据服务,它们分别可以满足用户对...无线局域网WLANs(Wireless Local Area Network)、通用分组无线服务GPRS(General Packet Radio Service)、通用移动通信系统UMTS(Universal Mobile Telecommunication System)网络都可以为移动用户提供数据服务,它们分别可以满足用户对不同带宽和不同服务质量的要求.一种融合了这三者的网络架构,并且可以保证移动用户的服务在不同网络中的连贯性,应该成为移动通信系统新的发展方向.在文章最后,还对该网络中使用的移动终端应具有的性能进行了描述.展开更多
Heterogeneous networks combine different access technologies. An important problem in such networks is the selection of the most suitable radio access network. To perform this task efficiently, a lot of information is...Heterogeneous networks combine different access technologies. An important problem in such networks is the selection of the most suitable radio access network. To perform this task efficiently, a lot of information is required, such as signal strength, QoS, monetary cost, battery consumption, and user preferences. These are well known issues and a considerable effort has been made to tackle them using a number of solutions. These efforts improve the performance of vertical handover but also add considerable complexity. In this paper, we introduce an enhanced algorithm for radio access network selection, which is simple, flexible and applicable to future mobile systems. Its main characteristics are the distribution of the radio access selection process among the mobile terminal and the core network, the evaluation of mobile terminal connections separately and the primary role of user preferences in the final decision. The performance of the algorithm is evaluated through simulation results, which show that the algorithm provides a high rate of user satisfaction. It decreases the messages required for the vertical handovers in the whole network and it alleviates the core network from the processing of unnecessary requests.展开更多
文摘无线局域网WLANs(Wireless Local Area Network)、通用分组无线服务GPRS(General Packet Radio Service)、通用移动通信系统UMTS(Universal Mobile Telecommunication System)网络都可以为移动用户提供数据服务,它们分别可以满足用户对不同带宽和不同服务质量的要求.一种融合了这三者的网络架构,并且可以保证移动用户的服务在不同网络中的连贯性,应该成为移动通信系统新的发展方向.在文章最后,还对该网络中使用的移动终端应具有的性能进行了描述.
文摘Heterogeneous networks combine different access technologies. An important problem in such networks is the selection of the most suitable radio access network. To perform this task efficiently, a lot of information is required, such as signal strength, QoS, monetary cost, battery consumption, and user preferences. These are well known issues and a considerable effort has been made to tackle them using a number of solutions. These efforts improve the performance of vertical handover but also add considerable complexity. In this paper, we introduce an enhanced algorithm for radio access network selection, which is simple, flexible and applicable to future mobile systems. Its main characteristics are the distribution of the radio access selection process among the mobile terminal and the core network, the evaluation of mobile terminal connections separately and the primary role of user preferences in the final decision. The performance of the algorithm is evaluated through simulation results, which show that the algorithm provides a high rate of user satisfaction. It decreases the messages required for the vertical handovers in the whole network and it alleviates the core network from the processing of unnecessary requests.
