Abstract
AbstractA highly efficient random access scheme ICMA‐PE (Idle‐Signal Casting Multiple Access with Partial Echo) is proposed for digital mobile communications. In this scheme, partial echo (PE) bits are broadcast with idle busy bite and receive nonreceive indicating bits as collision control bits to control mobile transmission, thus improving the random access efficiency.First, frame formats, behavior of mobile and base stations, and the transmission procedure are explained.Next, the packet failure rate and throughput are evaluated with both theoretical analysis and computer simulations. As a result it is clarified that about 20 percent improvement in maximum throughput is achieved compared to conventional schemes. The improvements achieved with transmissions also are mentioned and the transmission characteristic when various message length signals coexist is clarified. Finally, the effect of the coincidence of a PE with one from another station is evaluated, and it is shown that the PE bit length of about 7 bit is necessary to maintain the characteristic.
Published Version
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