蓝牙技术、GPS定位技术,重力加速器技术的不断发展为移动社交网络服务的产生和发展提供了新的契机。以面向现实为应用需求,探讨了MSNS(Mobile Social Network Services)的应用开发技术,设计了系统的体系结构,基于Android操作系统研究了其中关键功能的设计与实现。面向现实移动SNS系统拉近了人与人之间的距离,使SNS从"虚拟"走向"现实"。
To address the issue of resource scarcity in wireless communication, a novel dynamic call admission control scheme for wireless mobile network was proposed. The scheme established a reward computing model of call admission of wireless cell based on Markov decision process, dynamically optimized call admission process according to the principle of maximizing the average system rewards. Extensive simulations were conducted to examine the performance of the model by comparing with other policies in terms of new call blocking probability, handoff call dropping probability and resource utilization rate. Experimental results show that the proposed scheme can achieve better adaptability to changes in traffic conditions than existing protocols. Under high call traffic load, handoff call dropping probability and new call blocking probability can be reduced by about 8%, and resource utilization rate can be improved by 2%-6%. The proposed scheme can achieve high source utilization rate of about 85%.
