Consider a broadcast channel with N nodes and a transmission rate of R bps. Suppose the broadcast channel uses

polling (with an additional polling node) for multiple access. Suppose the amount of time from when a node completes

transmission until the subsequent node is permitted to transmit (that is, the polling delay) is dpoll. Suppose that within

a polling round, a given node is allowed to transmit at most Q bits. What is the maximum throughput of the broadcast

channel?