TY - GEN
T1 - Network coding relayed dynamic spectrum access
AU - Xin, Chunsheng
AU - Song, Min
AU - Ma, Liangping
AU - Hsieh, George
AU - Shen, Chien Chung
PY - 2010
Y1 - 2010
N2 - 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.
AB - 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.
KW - Design
UR - http://www.scopus.com/inward/record.url?scp=78649236983&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78649236983&partnerID=8YFLogxK
U2 - 10.1145/1859955.1859963
DO - 10.1145/1859955.1859963
M3 - Conference contribution
AN - SCOPUS:78649236983
SN - 9781450301411
T3 - Proceedings of the Annual International Conference on Mobile Computing and Networking, MOBICOM
SP - 31
EP - 36
BT - Proceedings 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
T2 - MobiCom'10 and 11th ACM International Symposium on Mobile Ad Hoc Networking and Computing, MobiHoc'10
Y2 - 20 September 2010 through 24 September 2010
ER -