TY - JOUR
T1 - Channel access and traffic control for dynamic-spectrum networks with single-transmit, dual-receive radios
AU - Krunz, Marwan
AU - Manzi, David
N1 - Funding Information:
This research was supported in part by NSF (under grants CNS-0721935 and CNS-0904681), Raytheon, and Connection One (an I/UCRC NSF/industry/university consortium). Any opinions, findings, conclusions, or recommendations expressed in this paper are those of the author (s) and do not necessarily reflect the views of NSF.
PY - 2011/6/1
Y1 - 2011/6/1
N2 - Cognitive radios have a great potential to improve spectrum utilization by enabling dynamic spectrum access. A key challenge in operating these radios is how to implement an efficient medium access control (MAC) mechanism that adaptively and efficiently allocates transmission powers and spectrum according to the surrounding environment. In this work, we propose a distributed MAC protocol for operating spectrum-agile radios in a multi-hop ad hoc network. Our protocol is unique in that it exploits the "dual-receive" capability of radios, which is used to overcome channel access problems that are common to multi-channel designs. We conduct theoretical analysis of the protocol and study its performance via simulations. To further improve the system throughput, we propose a framework for joint adaptive load and medium access controls. Simulation results show that the proposed scheme achieves more than 90% of the maximum (global) system throughput that is achieved at saturation, while guaranteeing low collision rates.
AB - Cognitive radios have a great potential to improve spectrum utilization by enabling dynamic spectrum access. A key challenge in operating these radios is how to implement an efficient medium access control (MAC) mechanism that adaptively and efficiently allocates transmission powers and spectrum according to the surrounding environment. In this work, we propose a distributed MAC protocol for operating spectrum-agile radios in a multi-hop ad hoc network. Our protocol is unique in that it exploits the "dual-receive" capability of radios, which is used to overcome channel access problems that are common to multi-channel designs. We conduct theoretical analysis of the protocol and study its performance via simulations. To further improve the system throughput, we propose a framework for joint adaptive load and medium access controls. Simulation results show that the proposed scheme achieves more than 90% of the maximum (global) system throughput that is achieved at saturation, while guaranteeing low collision rates.
KW - Cognitive radio
KW - MAC protocols
KW - Multi-channel access
KW - Single transceiver
KW - Spectrum-dynamic networks
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U2 - 10.1016/j.comcom.2011.02.006
DO - 10.1016/j.comcom.2011.02.006
M3 - Article
AN - SCOPUS:79954420569
VL - 34
SP - 935
EP - 947
JO - Computer Communications
JF - Computer Communications
SN - 0140-3664
IS - 8
ER -