Abstract
In this paper, a distributed “Win-Win” reciprocal-selection-based medium access scheme (DWWRS-MAS) is designed for a cooperative spectrum leasing system hosting multiple licensed transmission pairs and multiple unlicensed transmission pairs. Based on the proposed DWWRS-MAS, the primary transmitter (PT) intends to lease its spectral resources to an appropriate secondary transmitter (ST) in exchange for cooperative transmission assistance for the sake of minimizing its transmit power and simultaneously satisfying its transmit rate requirement. The ST has an incentive to collaborate with the best PT for the sake of minimizing the ST’s transmit power under the constraint of its Quality of Service (QoS) requirement, while simultaneously winning a transmission opportunity for its own traffic. Moreover, based on the matching theory and queueing theory, we analyze the algorithmic stability and the queueing stability of the cooperative spectrum leasing system exploiting our DWWRS-MAS, respectively. Simulation results demonstrate that our DWWRS-MAS is capable of providing both considerable energy savings and substantial rate improvements for the cooperative spectrum leasing system hosting multiple licensed transmission pairs and multiple unlicensed transmission pairs.
Highlights
1) BACKGROUNDCognitive Radio (CR) techniques [1], [2] were proposed for efficiently exploiting the scarce spectral resources by enabling the unlicensed secondary users (SU) to access the spectrum originally licensed to the primary users (PU)
In order to evaluate the achievable performance of the proposed scheme, we consider a specific scenario where both the primary transmitters and primary receivers are randomly located on the opposite sides of the entire network area
The primary network has two primary transmission pairs (PTPs), while the number of secondary transmission pairs ranges from M = 5 to M = 11
Summary
Cognitive Radio (CR) techniques [1], [2] were proposed for efficiently exploiting the scarce spectral resources by enabling the unlicensed secondary users (SU) to access the spectrum originally licensed to the primary users (PU). Numerous contributions have been developed based on the cooperative CR concept [7]–[10] Most of these existing contributions assumed that the relays agree to altruistically forward the data of the source node. Bearing in mind the greedy behaviour of the mobile RNs, meritorious solutions were proposed in [11]–[14] based on cooperative spectrum leasing model, where the licensed PU intends to lease part of its spectral resources to the unlicensed SU in exchange for cooperative transmission assistance. We first model a matching game based framework for capturing the details of the CSLS considered supporting multiple PUs and multiple SUs. based on the matching theory, a distributed ‘win-win’ reciprocal-selection-based medium access scheme (DWWRS-MAS) is developed for the sake of distributively producing the best cooperative pairs for the CSLS considered.
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