Optimal Power Scheduling for SIC-Based Uplink Wireless Networks with Guaranteed Real-Time Performance

摘要

The k-SIC technology can support at most k parallel transmissions, thus it has the prominent capability of providing fast media access, which is vital for real-time industrial wireless networks. However, it suffers from high power consumption because high interference has to be overcome. In this paper, given the real-time performance requirement of an uplink network supporting k-SIC, we study how to minimize aggregate power consumption of users by power scheduling. We prove that the problem is solvable in polynomial time. A universal algorithm with complexity of O(n~3) is proposed for k-SIC, where n is the number of transmitters. For the special case of k = 2, another algorithm with complexity of O(L~4) is presented, where L is the frame length. Simulation results reveal that both the aggregate power consumption and the maximal transmit power will be exponentially declined with further relaxation of the real-time performance.