一种基于GPRS网络的缓存一致性策略

Cache consistency strategy based on GPRS networks

提出了在GPRS网络中加入一个验证服务器VS维护无线移动环境下的缓存一致性的策略,利用GPRS骨干网中SGSN的有关移动终端的位置信息和用户访问的局域性,有针对性地只向在线终端发送所缓存数据的失效信息,有效地降低异步传输中的信息量。性能分析表明,该策略简化了维护缓存一致性的复杂性,使用很少的移动终端计算量,支持任意断开连接时间和一个PLMN网内的漫游。

A strategy of maintaining cache consistency in wireless mobile computing environments was provided, which added a VS server into the GPRS network, utilized the location information of mobile terminal in SGSN located at GPRS backbone and locality of user access, just sent invalidation information to mobile terminal which was online in accordance with the cached data, and reduced the information amount in asynchronous transmission. The performance analyses indicate that this strategy can simplify the complexity of maintaining cache consistency, support arbitrary disconnection intervals of mobile terminal and roaming in a PLMN with very little computing amount.