DocumentCode :
1350191
Title :
Performance comparison of a slotted ALOHA DS/SSMA network and a multichannel narrow-band slotted ALOHA network
Author :
De Graaf, Peter W. ; Lehnert, James S.
Author_Institution :
US Air Force Acad., Colorado Springs, CO, USA
Volume :
46
Issue :
4
fYear :
1998
fDate :
4/1/1998 12:00:00 AM
Firstpage :
544
Lastpage :
552
Abstract :
Throughput, delay, and stability for two slotted ALOHA packet radio systems are compared. One system is a slotted direct-sequence spread-spectrum multiple-access (DS/SSMA) network where each user employs a newly chosen random signature sequence for each bit in a transmitted packet. The other system is a multiple-channel slotted narrow-band ALOHA network where each packet is transmitted over a randomly selected channel. Accurate packet success probabilities for the code-division multiple-access (CDMA) system are computed using an improved Gaussian approximation technique which accounts for bit-to-bit error dependencies. Average throughput and delay results are obtained for the multiple-channel slotted ALOHA system and CDMA systems with block error correction. The first exit time (FET) is computed for both systems and used as a measure of the network stability. The CDMA system is shown to have better performance than the multiple-channel ALOHA system in all three areas
Keywords :
Gaussian processes; access protocols; approximation theory; code division multiple access; delays; error correction codes; packet radio networks; probability; random processes; spread spectrum communication; stability; telecommunication channels; CDMA; bit-to-bit error dependencies; block error correction; code-division multiple-access; delay; direct-sequence spread-spectrum multiple-access; first exit time; improved Gaussian approximation; multichannel narrow-band slotted ALOHA network; network stability; packet success probabilities; packet transmission; performance comparison; random signature sequence; randomly selected channel; slotted ALOHA DS/SSMA network; slotted ALOHA packet radio systems; stability; throughput; Delay; Error correction; FETs; Gaussian approximation; Multiaccess communication; Narrowband; Packet radio networks; Spread spectrum communication; Stability; Throughput;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/26.664310
Filename :
664310
Link To Document :
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