Optimal Compression and Transmission Rate Control for Node-Lifetime Maximization

被引:11
作者
Alvi, Sheeraz A. [1 ]
Zhou, Xiangyun [1 ]
Durrani, Salman [1 ]
机构
[1] Australian Natl Univ, Res Sch Engn, Canberra, ACT 2601, Australia
关键词
Machine-type communication; lifetime; energy efficiency; data compression; data transmission; ENERGY-EFFICIENT TRANSMISSION; LIMITED FEEDBACK; NETWORK LIFETIME; FADING CHANNELS; WIRELESS; TRADEOFF;
D O I
10.1109/TWC.2018.2870870
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We consider a system that is composed of an energy constrained sensor node and a sink node, and devise optimal data compression and transmission policies with an objective to prolong the lifetime of the sensor node. While applying compression before transmission reduces the energy consumption of transmitting the sensed data, blindly applying too much compression may even exceed the cost of transmitting raw data, thereby losing its purpose. Hence, it is important to investigate the trade-off between data compression and transmission energy costs. In this paper, we study the joint optimal compression-transmission design in three scenarios which differ in terms of the available channel information at the sensor node, and cover a wide range of practical situations. We formulate and solve joint optimization problems aiming to maximize the lifetime of the sensor node whilst satisfying specific delay and bit error rate constraints. Our results show that a jointly optimized compression-transmission policy achieves significantly longer lifetime (90% to 2000%) as compared to optimizing transmission only without compression. Importantly, this performance advantage is most profi)und when the delay constraint is stringent, which demonstrates its suitability for low latency communication in future wireless networks.
引用
收藏
页码:7774 / 7788
页数:15
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