面向蜂窝物联网的RB动态预分配调度方案  

RB dynamic pre-allocation scheduling scheme for cellular Internet of Things

作　　者：金叶奇 郑敏[1] 谭冲[1] 刘洪[1] JIN Yeqi;ZHENG Min;TAN Chong;LIU Hong(Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海微系统与信息技术研究所,上海200050 [2]中国科学院大学,北京100049

出　　处：《中国科学院大学学报（中英文）》2019年第6期825-831,共7页Journal of University of Chinese Academy of Sciences

基　　金：国家自然科学基金(61401445)资助

摘　　要：针对动态调度普遍存在的高信令开销问题,结合蜂窝物联网机器业务特点应用LTE半静态调度思想,提出一种资源块(resource block, RB)的动态预分配模型并设计相应的调度算法。利用设备缓冲区结合预分配参数代替传统授权调度,在低控制信道使用率和时延约束下,为业务动态分配RB数减少了资源浪费。仿真表明,算法降低了调度信令开销,控制信道有限下的时延满意度和业务信道利用率均优于动态和半静态调度算法。For high signaling overhead in dynamic scheduling, the LTE semi-persistent scheduling(SPS) is improved in combination with the machine traffic characteristics of cellular Internet of Things. We proposed a dynamic pre-allocation model of resource block(RB) and designed a corresponding scheduling algorithm. By using device buffers in combination with pre-allocation parameters instead of traditional grant scheduling, dynamic allocation of RBs for packets under low control channel usage rates reduces the resource waste. Simulation results show that the algorithm reduces the signaling overhead of scheduling, and the delay satisfaction and utilization of traffic channel under the limited control channel are better compared to the dynamic and semi-persistent scheduling algorithms.

关 键 词：蜂窝物联网 信令开销 半静态调度 动态预分配 

分 类 号：TN929.5[电子电信—通信与信息系统]