摘要
结合网络编码研究支持双向对传模式的中继蜂窝小区的带宽分配问题.首先给出直连链路传输模式和中继网络编码协作传输模式共存小区的带宽分配方法和用户传输模式选择策略,然后利用优化算法对小区中继位置、带宽资源分配、用户传输模式选择进行联合优化.仿真结果表明,采用网络编码协作传输模式能比采用传统的解码转发传输模式至少延长移动用户8.59%的生命周期.
Reducing energy consumption and extending battery life for mobile terminals （MTs） are becom-ing increasingly important to mobile communications. This paper proposes a bandwidth allocation method to minimize MTs~ average transmission power with the help of network coding （NC） in relay-aided cellular networks for two-way transmission. We first provide bandwidth allocation methods for direct transmission and relay-aided transmission respectively. An MT path selection strategy is then proposed. An optimization algorithm is presented to jointly optimize RS locations, bandwidth resources allocation, and MT path selection. Numerical results show that relays operating in the NC mode can extend MT battery life by at least 8.59% with respect to those operating in the decode-and-forward （DF） mode
出处
《应用科学学报》
CAS
CSCD
北大核心
2013年第4期331-337,共7页
Journal of Applied Sciences
基金
国家自然科学基金(No.61201203)
中国博士后科学基金(No.20100480329)资助
关键词
中继蜂窝网络
能量有效
双向对传
网络编码
relay-aided cellular network, energy efficiency, two-way transmission, network coding
