Title :
A new digital sense multiple access (DSMA) protocol for high-speed wireless networks
Author :
Leung, Kin K. ; Ho, Jin-Meng ; Chien, Herman
Author_Institution :
AT&T Labs., Red Bank, NJ, USA
Abstract :
We propose a new digital sense multiple access with delayed transmission (DSMA/DT) protocol for the reverse channel in high-speed wireless networks. The new protocol is motivated by the observation that the existing DSMA protocol does not yield satisfactory throughput for long round-trip propagation and processing delay, which occurs in outdoor, high-speed environments or when the receiver hardware requires long signal processing time. The new protocol is intended to reduce the performance impacts of the round-trip delay. Several optional features: look-ahead busy/idle flag, seizure queueing and reserved time slots are also devised for the new protocol. While requiring at most two additional status bits on the forward channel and no additional hardware capability, these features further enhance the protocol performance, and enable constant-bit-rate service with little added complexity. The channel throughput of the DSMA/DT protocol and the optional features are analyzed. Numerical results show a significant improvement of throughput for the new protocol compared to the existing DSMA protocol for non-negligible round-trip delay
Keywords :
access protocols; delays; land mobile radio; multi-access systems; packet radio networks; queueing theory; telecommunication channels; DSMA/DT protocol; channel throughput; constant-bit-rate service; delayed transmission; digital sense multiple access protocol; forward channel; high-speed wireless networks; long processing delay; long round-trip propagation; look-ahead busy/idle flag; outdoor environments; packet transmission; protocol performance; receiver hardware; reserved time slots; reverse channel; round-trip delay; seizure queueing; status bits; wireless LAN; Access protocols; Decoding; Delay effects; Hardware; Media Access Protocol; Propagation delay; Signal processing; Throughput; Wireless application protocol; Wireless networks;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1998. The Ninth IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-4872-9
DOI :
10.1109/PIMRC.1998.731419