Research output: Contribution to Journal/Magazine › Journal article › peer-review
Access strategies for spectrum sharing in fading environment : overlay, underlay, and mixed. / Khoshkholgh, Mohammad G.; Navaie, Keivan; Yanikomeroglu, Halim.
In: IEEE Transactions on Mobile Computing, Vol. 9, No. 12, 11615541, 12.2010, p. 1780-1793.Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Access strategies for spectrum sharing in fading environment
T2 - overlay, underlay, and mixed
AU - Khoshkholgh, Mohammad G.
AU - Navaie, Keivan
AU - Yanikomeroglu, Halim
PY - 2010/12
Y1 - 2010/12
N2 - In this paper, we analyze the achievable capacity of the secondary service for overlay and underlay access strategies. We then propose a novel mixed access strategy in which in contrast to the underlay strategy, the secondary service transmits during the idle periods without considering the interference threshold constraint. In contrast to the overlay strategy, mixed strategy makes transmission during the busy periods with a probability p(a) subject to satisfying the interference threshold constraint. Parameter p(a) is a secondary service parameter, which can be adjusted based on the spectrum status. Moreover, we show that the secondary service can adjust pa to select appropriate access strategy with the objective of maximizing the achieved capacity based on the interference at the secondary service receiver, I, imposed by the primary service transmitter. The proposed spectrum-sharing technique developed in this paper based on I significantly reduces the system complexity comparing to the system in which for spectrum sharing, the imposed interference at the primary receiver is required. We further suggest a simple power allocation scheme for the mixed strategy that its achieved capacity is very close to the maximum achievable capacity of the secondary service.
AB - In this paper, we analyze the achievable capacity of the secondary service for overlay and underlay access strategies. We then propose a novel mixed access strategy in which in contrast to the underlay strategy, the secondary service transmits during the idle periods without considering the interference threshold constraint. In contrast to the overlay strategy, mixed strategy makes transmission during the busy periods with a probability p(a) subject to satisfying the interference threshold constraint. Parameter p(a) is a secondary service parameter, which can be adjusted based on the spectrum status. Moreover, we show that the secondary service can adjust pa to select appropriate access strategy with the objective of maximizing the achieved capacity based on the interference at the secondary service receiver, I, imposed by the primary service transmitter. The proposed spectrum-sharing technique developed in this paper based on I significantly reduces the system complexity comparing to the system in which for spectrum sharing, the imposed interference at the primary receiver is required. We further suggest a simple power allocation scheme for the mixed strategy that its achieved capacity is very close to the maximum achievable capacity of the secondary service.
KW - Achievable capacity
KW - dynamic spectrum access
KW - interference threshold
KW - overlay strategy
KW - spectrum sharing
KW - underlay strategy
KW - COGNITIVE RADIO NETWORKS
KW - POWER ALLOCATION
KW - CAPACITY
KW - CHANNELS
KW - SYSTEMS
KW - CONSTRAINTS
KW - DESIGN
KW - IMPACT
KW - LIMITS
U2 - 10.1109/TMC.2010.57
DO - 10.1109/TMC.2010.57
M3 - Journal article
VL - 9
SP - 1780
EP - 1793
JO - IEEE Transactions on Mobile Computing
JF - IEEE Transactions on Mobile Computing
SN - 1536-1233
IS - 12
M1 - 11615541
ER -