Title :
Throughput and delay analysis of DS/SSMA unslotted ALOHA by non-perfect capture
Author :
Yamazato, T. ; Sato, T. ; Okada, H. ; Katayama, M. ; Ogawa, A.
Author_Institution :
Dept. of Inf. Eng., Nagoya Univ., Japan
Abstract :
Throughput and delay analysis of direct-sequence spread spectrum multiple access (DS/SSMA) unslotted ALOHA is presented. Due to the fluctuation of the levels of multi-user interference during the packet transmission, we calculate the throughput and delay by considering not only the number of overlapped packets but also the amount of time overlap. We consider the case of variable packet length and fixed packet length. As a result, we found that the performance of DS/SSMA unslotted ALOHA with fixed packet length is better than that with variable packet length
Keywords :
access protocols; channel capacity; delays; packet radio networks; pseudonoise codes; radiofrequency interference; spread spectrum communication; DS/SSMA unslotted ALOHA; delay analysis; direct-sequence spread spectrum multiple access; fixed packet length; multi-user interference; nonperfect capture; overlapped packets; packet transmission; performance; throughput; time overlap; variable packet length; Additive white noise; Delay effects; Error probability; Fluctuations; Gaussian noise; Interference; Multiaccess communication; Packet radio networks; Spread spectrum communication; Throughput;
Conference_Titel :
Universal Personal Communications. 1995. Record., 1995 Fourth IEEE International Conference on
Conference_Location :
Tokyo
Print_ISBN :
0-7803-2955-4
DOI :
10.1109/ICUPC.1995.497107
