دانلود رایگان مقاله حداکثر توان عملیاتی برای شبکه های شخصی بی سیم 60 گیگاهرتز تعاونی

Abstract

Transmission in the 60 GHz frequency band performs poorly in long-distance direct links due to the large path loss. The received signal strength can be relatively weak if the line-of-sight path is blocked by obstacles. A device cooperation approach, which effectively combats the severe path loss thereby improving the overall throughput for wireless personal area networks (WPANs), is proposed in this paper. Throughput maximization is formulated as a linear programming problem and the optimal solutions are provided in each case. Comprehensive simulations are performed to quantify the performance of the cooperative approach with different antenna models and spatial reuse strategies. The effect of minor-lobe, imperfect information and other factors are investigated under different network settings. The performance analysis presented here can provide guidelines for the design of cooperative 60 GHz WPANs.

7. Conclusion

In this work, we propose the use of cooperative transmission to improve the throughput of directional 60 GHz WPANs. Both achievable and bursty data demand scenarios are studied. Throughput maximization is formulated as linear programming problem and solved by the column generation method. Performance analysis is performed based on simulations considering different antenna models and spatial reuse strategies. The minor-lobe effect and performance gap due to imperfect information are investigated under different network settings. We also compare the proposed optimal cooperative scheme with an extension of the protocol used in [4], which presents around 20% to 45% higher throughput. In summary, the proposed cooperative transmission scheme can significantly improve the throughput of 60 GHz WPANs.