Balancing System Throughput and Fairness in Multi-User OFDMA-TDD Using Busy Bursts
This paper analyses Busy Burst (BB) enabled interference avoidance for multi-user Orthogonal Frequency Division Multiple Access (OFDMA) in a Manhattan grid deployment scenario. Upon successful reception of data, the receiver transmits a BB in a time-multiplexed mini-slot. Exploiting the channel reciprocity of Time Division Duplex (TDD), an exclusion region around a victim receiver is established, where potential transmitters are denied access to reserved resources. The size of the exclusion region is determined by a threshold parameter, known to the entire network. System level simulations compare the system and user throughput of BB enabled interference avoidance with greedy resource allocation that does not attempt to avoid interference.