A novel spread slotted Aloha system with channel load sensing protocol

Author

Toshimitsu, Kiyoshi ; Yamazato, Takaya ; Katayama, Masaaki ; Ogawa, Akira

Author_Institution

Dept. of Inf. Electron., Nagoya Univ., Japan

Volume

12

Issue

4

fYear

1994

fDate

5/1/1994 12:00:00 AM

Firstpage

665

Lastpage

672

Abstract

This paper presents a novel spread slotted Aloha system with channel load sensing protocol (CLSP). CLSP is an effective scheme to improve the throughput performance in spread unslotted Aloha systems. In spread slotted Aloha systems, however, it does not make sense to utilize CLSP because the slot size is usually the same as the packet size. The slot size of the proposed system is set less than the packet size, thereby enabling the authors to apply CLSP and improving the throughput performance. Another feature of the proposed system is that the system is not likely affected by the time difference between channel load sensing and timing of packet access, which they call the access timing delay. Throughput performance of the proposed system is evaluated in the presence of the access timing delay and a significant increase of the throughput is shown compared with that of spread unslotted Aloha with CLSP

Keywords

delays; packet switching; protocols; spread spectrum communication; telecommunication channels; access timing delay; channel load sensing protocol; packet access timing; packet size; slot size; spread slotted Aloha system; throughput performance; Access control; Access protocols; Degradation; Delay effects; Interference; System performance; Throughput; Timing; Transmitters;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.286673

Filename

286673