信息感知的分层加权干扰消除编码缓存  

Information-A ware Layered Weighted Interference Cancellation Coded

作　　者：王璞 刘超[2] 包建荣[1] 姜斌[1] WANG Pu;LIU Chao;BAO Jianrong;JIANG Bin(School of Communication Engineering,Hangzhou Dianzi University,Hangzhou 310018,China;Information Engineering College,Hangzhou Dianzi University,Hangzhou 311305,China)

机构地区：[1]杭州电子科技大学通信工程学院,杭州310018 [2]杭州电子科技大学信息工程学院,杭州311305

出　　处：《北京邮电大学学报》2023年第4期46-51,共6页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(U1809201);浙江省属高校基本科研业务费专项项目(GK209907299001-003);浙江省普通本科高校“十四五”教学改革项目(jg20220225)。

摘　　要：为了消除多中继系统未请求子文件的干扰,提高系统传输总自由度,提出了信息感知的分层加权干扰消除编码缓存方案。该方案根据用户、中继的缓存容量、用户和文件数量将系统划分为两个子系统,联合设计加权干扰消除、正交单播和去中心化编码多播来最小化链路负载和提高系统总自由度。对于子系统Ⅰ,在单次无干扰传输子文件数大于用户数时引入单播,相对传统干扰消除,可获得的额外总自由度增益。在子系统Ⅱ中,提出了多中继协作编码传输,极大地降低了传输次数,提高系统总自由度。仿真表明,在单次无干扰传输子文件数小于用户数时,所提方案获得的总自由度优于传统未编码缓存方案,可实现最低1.3倍的总自由度增益;与传统干扰消除方案相比,所提方案可获约10.6%的总自由度增益。An information-aware hierarchical weighted interference cancellation coded caching scheme is proposed for multiple relay systems to eliminate the interference of unrequested subfiles and improve the degrees-of-freedom of the system.The proposed scheme divides the system into subsystems Ⅰ and Ⅱ to minimize link load and improve the degrees-of-freedom according to the cache capacities of the user and relays,and the number of users and files by jointly designing weighted interference cancellation,orthogonal unicast scheme,and decentralized coded caching scheme.In subsystem I,when subfiles are more than users in the single interference-free transmission,the unicast is introduced to achieve additional degrees-of-freedom compared to the traditional interference cancellation.In subsystem I,the multi-relay cooperative coded transmission is proposed to reduce massive steps of the delivery and improve the system degrees-of-freedom.Simulation results show that when the number of subfiles is less than that of users in a single interference-free transmission,the system degrees-of-freedom obtained by the proposed scheme is better than that of the traditional orthogonal unicast scheme,and can achieve more than 1.3 times system degrees-of-freedom gains.In addition,it also achieves about 10.6%degrees-of-freedom gains compared with that of the traditional interference cancellation scheme.

关 键 词：编码缓存 物理层网络编码 多中继系统 干扰消除 

分 类 号：TN929.5[电子电信—通信与信息系统]