Parameters of the Сarrier Sense Multiple Access Protocol with Conflicts Resolving at the Physical Layer
Keywords:CSMA – CD, conflicts resolvconflicts resolving on the physical layer, multiuser detection theory, queuing system, source of recurring calls
At present, the global growth of communication needs makes us more efficient in using of the frequency spectrum. The development of communication systems requires an increase of throughputs, but the frequency spectrum is limited, which will not allow to increase the channel width or the number of channels. Assuming that at one frequency there is an opportunity to transmit several mutual interference signals at one time, the problem of the separation of these signals arises. But, complexity of demodulation procedures has significantly increased compared to the classical. It is necessary, therefore, to determine whether this complexity increasing will be justified. To answer this question, it is necessary to find out how the throughput of the random multiple access system increases, where the frequency resource multiple reusing is possible. For research was chosen the carrier sense multiple access protocol, which have become widespread in packet networks for their successful combination of relative simplicity of access algorithms and fairly high efficiency. The purpose of the research is to determine the main characteristics of the various carrier sense multiple access protocols with collision detection and with additional assumption about conflicts resolving at the physical layer. The parameters of the carrier sense multiple access protocols with collision detection and with additional assumption about conflicts resolving at the physical layer are obtained. It is shown that in comparison with the classical protocol, the assumption about paired conflicts resolving at the physical layer gives the significant increasing of the throughput in the communication systems with such access protocols. The comparison results are given. The obtained results allow to confirm the expediency of implementation in demodulators of the perspective receiving devices algorithms of conflicts resolving at the physical layer as being characterized by relatively small complexity.
Verdu S. (1998) Multiuser Detection, Cambridge University Press, 474 p.
Lupas R. and Verdu S. (1989) Linear multiuser detectors for synchronous code-division multiple-access channels. IEEE Transactions on Information Theory, Vol. 35, Iss. 1, pp. 123-136. DOI: 10.1109/18.42183
Ageev D.V. (1935) Osnovyi teorii lineynoy selektsii, Nauchno-tehnicheskiy sbornik, Iss. 10, pp. 8-28.
Borisov Yu. and Penin P. (1967) Osnovyi mnogokanalnoy peredachi informatsii, Moskva, Svyaz, 435 s.
Burachenko D. (1990) Optimalnoe razdelenie tsifrovyih signalov mnogihpolzovateley v liniyah i setyah svyazi v usloviyah pomeh. Leningrad: VAS, 302 p.
Bobrovskiy V. (2007) Mnogopolzovatelskoe detektirovanie. Ulyanovsk: Vektor-S, 348 s.
Yerokhin V. F. and Peleshok Y. V. (2016) Mathematical model сoherent demodulation of synchronous mutually nonorthogonal digital signals with minimum frequency-shift keying, Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, Iss. 64, pp. 41-50. doi: 10.20535/RADAP.2016.64.41-50.
Klyuev V.F. (2015) Issledovanie optimal'nykh kogerentnykh demodulyatorov AM i ChM signalov [The study of optimal coherent demodulators AM and FM signals], Nizhniy Novgorod, 20 p.
Gerasimenko E. S. (2017) Algorithm for digital coherent demodulation of phase-shift keyed signals and its characteristics, Vestnik of Voronezh Institute of the Ministry of Internal Affairs of the Russian Federation, no. 1, pp. 137-143.
Glushkov A.N. and Gerasimenko E.S. (2017) Algorithm of digital coherent demodulation of binary signals with differential phase keying and its interference immunity
Vestnik Voronezhskogo gosudarstvennogo tekhnicheskogo universiteta, No. 5, pp. 70-74.
Sboyev R.Yu., Polyakova A.S. and Yerokhin V.F. (2018) Asymptotic analysis of the random multiple access protocol ``Nonpersistent CSMA-CD'' with pairwise conflicts resolving at the physical layer, Problemy teplekomunikatsii, 3p.
Nazarov A.A. (1991) Asimptoticheskiy analiz markoviziruemyih sistem, Tomsk, TGU, 158 p.
How to Cite
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).