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Titolo:
A PERFORMANCE EVALUATION OF SLOTTED ALOHA MULTIPLE-ACCESS ALGORITHMS WITH FIXED AND VARIABLE FRAMES FOR RADIOMOBILE NETWORKS
Autore:
BENELLI G; CAU GR; RADAELLI A;
Indirizzi:
UNIV SIENA,FAC INGN,VIA ROMA 77 I-53100 SIENA ITALY OTE SPA I-50127 FLORENCE ITALY
Titolo Testata:
IEEE transactions on vehicular technology
fascicolo: 2, volume: 43, anno: 1994,
pagine: 181 - 193
SICI:
0018-9545(1994)43:2<181:APEOSA>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
PACKET;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
11
Recensione:
Indirizzi per estratti:
Citazione:
G. Benelli et al., "A PERFORMANCE EVALUATION OF SLOTTED ALOHA MULTIPLE-ACCESS ALGORITHMS WITH FIXED AND VARIABLE FRAMES FOR RADIOMOBILE NETWORKS", IEEE transactions on vehicular technology, 43(2), 1994, pp. 181-193

Abstract

Radiomobile networks. among them GSM, DECT, TETRA, and PCN, are increasingly providing voice and data services to users over vast territories. In radiomobile systems, access to radio channels is controlled by a radio base station which sends and receives digital signals from mobile units in order to implement connections. All the digital messages are time-division multiplexed over one or more control channels, whilethe information flow is transmitted over shared radio channels. This paper evaluates the performance of the slotted Aloha access method with a superimposed frame structure. Its advantages, especially when channel occupancy is not detectable by all users and/or under particular traffic conditions, are pointed out. The proposed method, which has been incorporated in European trunking system standards such as MPT 1327,is suitable for both private (PMR) and public networks. The method isanalyzed in terms of the average number of collisions per unit of time (or frame), with finite and infinite numbers of users, and with fixed and variable frame lengths. The analysis also includes hybrid access, i.e., simultaneous random and dedicated, which mobile fleets, for example, use to send data at a preset rate. In addition, the criteria for sizing frame lengths and investigating the stability of the methods are described. New ways of optimizing network performance are also presented. The results of the simulations are in good agreement with the theoretical predictions.

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Documento generato il 22/09/20 alle ore 08:04:31