Inter-Base Station Cooperative Scheduling Method Among Multiple Service Channels to Maximize Integrated System Throughput

摘要

In this paper, we propose an inter-base station (BS) cooperative scheduling method among terminals in multiple service channels that maximizes the system throughput, which is an integrated system metric concatenating the performance levels of all services. The fifth generation (5G) mobile communication system is expected to support various wireless communication services such as massive machine-type communications (mMTC), ultra-reliable low latency communications (URLLC), and enhanced mobile broadband (eMBB). These services will serve different numbers of terminals and have different requirements in terms of spectrum efficiency and fairness among terminals. Therefore, appropriately allocating resources to terminals receiving different services is essential to utilize fully the overall system bandwidth considering the performance levels of all services. The proposed method assumes the centralized radio access network (C-RAN) architecture in heterogeneous networks. The proposed method achieves optimal coordinated time/frequency-domain scheduling with inter-BS cooperation. The optimization criterion is to maximize the integrated system throughput among service channels. Extensive computer simulation results show that the proposed method achieves significant enhancement in the achievable integrated system throughput compared to that for the conventional method, especially when a service prioritizes the fairness among terminals and the number of pico BSs is large.