Abstract:

In order to decrease the random access latency and to lower the collision probability, an interleave division multiple access scheme is adopted as the multiple access scheme of resource request data part of the one-step random access scheme. The number of available random identifier will be enlarged when inserting several additional bits into the data part. An asynchronous IDMA receiver is designed for multi-user detection of the data part. Analysis and simulation results show that the collision probability can be lowered dramatically by using the proposed scheme.

Key words: random access channel, interleave division multiple access, asynchronous receiver, collision probability