TY - GEN
T1 - MAC protocol adaptation in cognitive radio networks
AU - Huang, Kuo Chun
AU - Raychaudhuri, Dipankar
PY - 2011
Y1 - 2011
N2 - This paper presents an adaptive MAC (AMAC) protocol for supporting MAC layer adaptation in cognitive radio networks. MAC protocol adaptation is motivated by the flexibility of emerging software-defined radios which makes it feasible to dynamically adjust radio protocols and parameters in order to maintain communications quality. Dynamic changes to the MAC layer may be useful in tactical or vehicular networking scenarios, where radio node density, traffic volumes and service requirements can vary widely over time. A specific control framework for the proposed AMAC algorithm is described based on the CogNet protocol stack which uses a Global Control Plane (GCP) to distribute control information between nearby radios. An AMAC prototype which switches between CSMA and TDMA is evaluated for various traffic scenarios using the NS-2 simulator. In addition, a proof-of-concept AMAC protocol is implemented using GNUradio/USRP platforms on the ORBIT radio grid testbed. Detailed simulation and experimental results are given for both UDP and TCP traffic with different usage scenarios and application models. The results show that AMAC can provide improved performance relative to a conventional static system and can be implemented with reasonable control protocol overhead and latency.
AB - This paper presents an adaptive MAC (AMAC) protocol for supporting MAC layer adaptation in cognitive radio networks. MAC protocol adaptation is motivated by the flexibility of emerging software-defined radios which makes it feasible to dynamically adjust radio protocols and parameters in order to maintain communications quality. Dynamic changes to the MAC layer may be useful in tactical or vehicular networking scenarios, where radio node density, traffic volumes and service requirements can vary widely over time. A specific control framework for the proposed AMAC algorithm is described based on the CogNet protocol stack which uses a Global Control Plane (GCP) to distribute control information between nearby radios. An AMAC prototype which switches between CSMA and TDMA is evaluated for various traffic scenarios using the NS-2 simulator. In addition, a proof-of-concept AMAC protocol is implemented using GNUradio/USRP platforms on the ORBIT radio grid testbed. Detailed simulation and experimental results are given for both UDP and TCP traffic with different usage scenarios and application models. The results show that AMAC can provide improved performance relative to a conventional static system and can be implemented with reasonable control protocol overhead and latency.
UR - http://www.scopus.com/inward/record.url?scp=79959294284&partnerID=8YFLogxK
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U2 - 10.1109/WCNC.2011.5779135
DO - 10.1109/WCNC.2011.5779135
M3 - Conference contribution
AN - SCOPUS:79959294284
SN - 9781612842547
T3 - 2011 IEEE Wireless Communications and Networking Conference, WCNC 2011
SP - 245
EP - 250
BT - 2011 IEEE Wireless Communications and Networking Conference, WCNC 2011
T2 - 2011 IEEE Wireless Communications and Networking Conference, WCNC 2011
Y2 - 28 March 2011 through 31 March 2011
ER -