The Coded Tone Sense Protocol for Multihop Spread Spectrum Packet Radio Networks

Kwok-Wah HUNG  Tak-Shing YUM  

IEICE TRANSACTIONS on Communications   Vol.E77-B   No.1   pp.51-55
Publication Date: 1994/01/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Radio Communication
communication protocol,  packet radio networks,  

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In Spread Spectrum Packet Radio Networks (SS/PRNs), different spreading codes are required for different stations for transmitting packets. Therefore multihop SS/PRNs with a large number of stations would require a large number of codes and hence a large channel bandwidth. In this paper we design a code assignment algorithm which could reduce the number of codes required to about 22%. Further reducing the number of codes is found to cause little throughput degradation. The Coded Tone Sense protocol is designed for using these codes in multihop PRNs. Simulation result shows that in a 80 node network using only 5 spreading codes, the maximum network throughput is about 73% higher than the BTMA protocol.