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...deed, sharing has been adopted in the TV white spaces [1] and is being considered for federal spectrum such as 3.5 GHz band [2]. Many different approaches to spectrum sharing have been studied, e.g., =-=[3]-=-–[5], much of this under the “primary-secondary” model. Here, the primary user has priority usage of the frequency band, while the secondary users are allowed to access the spectrum provided that they...

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...rum sharing is opportunistic spectrum sharing [1], where SUs identify the timefrequency resources unused by the PUs [2][3][4], and exploit them for their own transmissions [5][6][7]. Thanks to the development of advanced signal processing and interference management techniques, cooperative spectrum sharing is considered as an alternative way to share spectrum more efficiently between primary and secondary users. Instead of transmitting in idle time or on idle frequency, the SUs relay primary packets, and transmit their own packets with superimposed signal [8][9][10][11], or with a time[12][13][14], frequency-[15][16], or space-[17] division based cooperative relaying scheme. With appropriate cooperation between the two networks, the throughput or the power efficiency of the PUs can be guaranteed or improved, whereas the SUs gain more transmission opportunities. The literature on cooperative spectrum sharing networks addresses the optimal relay selection and resource allocation [12][13][14], and presents scaling laws [18][19][20], assuming that users are always willing to cooperate and always have packets to transmit. Non-backlogged traffic is considered for various cooperative spectrum...

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...for primary user and reduce the total sensing time (e.g., [2]–[4]). Cooperation between licensed primary users and secondary licensed users can help improve the performances of both sides (e.g., [5]– =-=[7]-=-). In this paper, we focus on the issue of cooperation among secondary users in terms of spectrum sharing. The key observation that motivates us in this study is that different secondary users may hav...

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... proposed small cell coalitional game is in partition form, which is a class of coalitional games significantly different than classical characteristic form games, widely studied in wireless networks =-=[34]-=-, [35](and reference therein). We solve the considered game through the concept of a recursive core [38], a key solution concept for coalitional games in partition form. In summary, our key contributi...