Distributed multichannel random access networks with selfish users
| Autor: | O. Ileri, Ali Ozyagci, Jens Zander |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Selfish users
User terminals Computer science Cognitive radio Distributed computing User utility Distributed systems Communications system Nash equilibria Distributed schemes Frequency allocation symbols.namesake Random access systems Dynamic spectrum allocations Multichannel random access Wireless Spectrum demand Complex task Dynamic spectrum access business.industry Communication Systems Multi-channel Cooperative schemes Telekommunikation Spread spectrum Nash equilibrium Noncooperative game Time and space Telecommunications symbols business Operating points Game theory Kommunikationssystem Random access Computer network |
| Zdroj: | CrownCom |
| DOI: | 10.4108/icst.crowncom2010.9284 |
| Popis: | Dynamic spectrum access (DSA) schemes allow the users to share spectrum resources by taking advantage of the variations in spectrum demand over time and space. Carrying out dynamic spectrum allocation centrally, however, can be a complex task. For this reason, distributed schemes in which users can access the available channels independently may be preferable to centralized DSA schemes. Cognitive radio systems, which enable user terminals to sense their environment and form their action accordingly, are particularly well-suited for distributed systems. On the other hand, the freedom in distributed schemes gives the users the option to act selfishly, which has decisive effects on system performance. In this paper we consider a distributed multichannel wireless random access system where users selfishly access the channels in the system. We analyze the behavior of the selfish users by modeling the system as a non-cooperative game and we identify all stable operating points (Nash equilibria) of this game. We then compare the performance of this system with a number of cooperative distributed DSA schemes in terms of user utilities. Our results show that the performance of the selfish multichannel random access system can be comparable to cooperative schemes. QC 20111208. © 2010 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. QC 20111207 |
| Databáze: | OpenAIRE |
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