【摘要】 在实时的非对称通讯环境下,自适应混合广播策略能够根据数据的请求模式以及时间限制等特征来动态分配周期广播和按需广播的带宽比例。将这一策略推广到基于事务的多数据项广播调度中,同时引入"分布式广播"思想,以更精细的周期广播粒度来解决过长的周期广播与事务及数据的实时要求之间的矛盾,并且动态分配时间槽。实验结果表明:改进的调度策略更适合于实时环境下的数据广播,具有更低的事务失败率以及更小的上行信道负荷。更多还原

【Abstract】 In time-critical asymmetric communication environment,the adaptive hybrid broadcast---TC-AHB can dynamically assign the bandwidth ratio for periodic broadcast and on-demand broadcast according to data-requested mode and time limit.The paper extended the strategy to the broadcast based on transaction scheduling,adopted an idea called distributed broadcast to solve confliction between a long periodic broadcast interval and real-time requirement of data and transactions and assigned the time slot dynamically.The result of experimentation indicates that the strategies improved on adaptive hybrid broadcast mode are more suitable for data broadcast application in real-time environment and have lower transaction failure ratio and lower uplink load.更多还原