Network coding relayed dynamic spectrum access

Chunsheng Xin, Min Song, Liangping Ma, George Hsieh, Chien Chung Shen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

Existing paradigms of dynamic spectrum access (DSA) impose a 'foe' relationship between the primary users (PUs) and the secondary users (SUs), where SUs may access the spectrum only when PUs cease using it, and the resurgence of PU traffic disrupts SU traffic. To comply with such stringent DSA policies, SUs behave conservatively to sense and access the spectrum, which may result in an actual spectrum utilization lower than what is feasible. Applying network coding (NC), this paper proposes a new DSA architecture termed network coding relayed DSA (NCR-DSA). In NCRDSA, NC is conducted between PU traffic and SU traffic to enable SU nodes to serve as relays for PU trafficb etween PU nodes. While relaying PU traffic, SU nodes seek opportunities to encode SU trafficon to PU trafficfor transmission, i.e., SU packets are 'piggybacked' via NC on PU packets without incurring separate spectrum access. A Linear Programming model has been developed to analyze the throughput gain of NCR-DSA in comparison with existing DSA paradigms. Numerical results show that NCR-DSA significantly increases throughput for both PU and SU, creating a 'win-win' DSA paradigm.

Original languageEnglish
Title of host publicationProceedings of the 2010 ACM Workshop on Cognitive Radio Networks, CoRoNet '10, Co-located with MobiCom'10 and 11th ACM International Symposium on Mobile Ad Hoc Networking and Computing, MobiHoc'10
Pages31-36
Number of pages6
DOIs
StatePublished - 2010
EventMobiCom'10 and 11th ACM International Symposium on Mobile Ad Hoc Networking and Computing, MobiHoc'10 - Chicago, IL, United States
Duration: 20 Sep 201024 Sep 2010

Publication series

NameProceedings of the Annual International Conference on Mobile Computing and Networking, MOBICOM

Conference

ConferenceMobiCom'10 and 11th ACM International Symposium on Mobile Ad Hoc Networking and Computing, MobiHoc'10
Country/TerritoryUnited States
CityChicago, IL
Period20/09/1024/09/10

Keywords

  • Design

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