Communicating isochronous and asynchronous data

摘要: In a medium access control (MAC) protocol for wireless communications network, between point and other nodes are coordinated by repeated superframe. This superframe contains in sequence contention-free period (CFP1), contention-based period, second (CFP2). Prior to CFP1 node hops from one channel frequency another. CFP2 is used initial transmission of isochronous data (such as voice signals); the following retransmission any such which were not correctly received at first attempt, after hop start that arrangement minimises delay before data, improves robustness system.