Performance analysis of mobile packet radio networks in real channels with inhibit-sense multiple access

This paper is concerned with the performance analysis of unslotted frequency-hopped spread spectrum packet radio networks with Reed-Solomon forward error control coding. The following different network alternatives are analyzed in a unified manner (i) random/one-coincidence frequency hopping patterns, (ii) one/several code symbols per dwell interval, (iii) independent/dependent packet arrival processes, (iv) fixed/variable length packets. Joint probability generating functions for the pair-wise hit patterns and the effective multiple-access interference vector are determined for the different alternatives. Closed form formulae and expressions for packet capture probabilities are readily obtained from these generating functions. A direct proof is given that in the case of single symbol/dwell packets symbol errors, are asymptotically independent. Numerical results indicate that the unslotted networks outperform the corresponding slotted ones at low to moderate traffic levels, and the difference between the two networks is diminishing when the number of frequency bins is large.

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PERFORMANCE ANALYSIS OF FREQUENCY-HOPPED SPREAD-SPECTRUM PACKET RADIO NETWORKS PART I: SLOTTED MULTIPLE-ACCESS

Journal of Circuits System and Computers ◽

10.1142/s0218126696000303 ◽

1996 ◽

Vol 06 (05) ◽

pp. 435-452

Author(s):

KHAIRI ASHOUR MOHAMED ◽

LÁSZLÓ PAP

Keyword(s):

Performance Analysis ◽

Generating Functions ◽

Spread Spectrum ◽

Multiple Access ◽

Error Control ◽

Joint Probability ◽

Direct Proof ◽

Radio Networks ◽

Packet Radio Networks ◽

Packet Radio

This paper is concerned with the performance analysis of slotted frequency-hopped packet radio networks with Reed-Solomon forward error control coding. Both random and one coincidence frequency hopping patterns are considered. A new concept of the pair-wise hit patterns and the effective multiple-access interference are introduced. The joint probability generating functions of these interference vectors are determined for both synchronous and asynchronous hopping. Closed form expressions for packet capture probabilities and throughput are derived in terms of these joint generating functions. Finally a direct proof is given that hits in different symbols are asymptotically independent.

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Idle signal multiple-access (ISMA) scheme for terrestrial packet radio networks

Electrical Engineering in Japan ◽

10.1002/ecja.4400641009 ◽

1981 ◽

Vol 64 (10) ◽

pp. 66-74 ◽

Cited By ~ 4

Author(s):

Kaiji Mukumoto ◽

Akira Fukuda

Keyword(s):

Multiple Access ◽

Radio Networks ◽

Packet Radio Networks ◽

Packet Radio

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PERFORMANCE ANALYSIS OF FREQUENCY-HOPPED PACKET RADIO NETWORKS WITH SPATIALLY DISTRIBUTED USERS-COMBINED ERROR AND ERASURE DECODING CONSIDERED

Journal of Circuits System and Computers ◽

10.1142/s0218126600000123 ◽

2000 ◽

Vol 10 (03n04) ◽

pp. 159-171

Author(s):

KHAIRI ASHOUR MOHAMED ◽

LÁSZLÓ PAP

Keyword(s):

Spatial Distribution ◽

Performance Analysis ◽

Generating Functions ◽

Joint Probability ◽

Radio Networks ◽

Packet Radio Networks ◽

Packet Radio ◽

Novel Technique ◽

Packet Capture ◽

Spatially Distributed

This paper is concerned with the performance analysis of frequency-hopped packet radio networks with random spatial distribution of users. Depending on their relative energies, hits may either cause errors, erasures, or be ineffective. Combined error and erasure Reed Solomon decoding is used. Two types of hopping patterns are considered, namely random and one-coincidence patterns. Using a novel technique of the joint probability generating functions of the so called effective interference vectors, general closed form expressions for packet capture probabilities are derived. Numerical results indicate that, depending on the coding rate and traffic levels, larger values of the throughput can be achieved by using either error only or erasure only decoding.

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