TSRMA-A communication protocol for data transmission by radio channels

A protocol is presented which is intended to solve the problem of communication between a number of widely separated users and a central station. It is assumed here that the greatest part of the traffic is between the users and the central station and that little need exists for connection between the users themselves. Time slot reservation multiple access (TSRMA) protocol is shown schematically, and it is pointed out that the protocol is a combination of synchronous time division multiple access and roll-call polling. It is noted that while in all other protocols the delay is defined as the time elapsing from generation of a packet until its transmission, in TSRMA protocol the delay is defined as the time elapsing from the packet generation until acknowledgment receipt. It is therefore thought that the delay in TSRMA protocol should decrease by an additional factor, improving the performance of the protocol. Among the advantages of the protocol is the larger area coverage, because line of sight requirements are confined to those between central station and user.