Title :
Coalitions in Cooperative Wireless Networks
Author :
Mathur, Suhas ; Sankar, Lalitha ; Mandayam, Narayan B.
Author_Institution :
Dept. of Electr. Eng., Rutgers Univ., North Brunswick, NJ
fDate :
9/1/2008 12:00:00 AM
Abstract :
Cooperation between rational users in wireless networks is studied using coalitional game theory. Using the rate achieved by a user as its utility, it is shown that the stable coalition structure, i.e., set of coalitions from which users have no incentives to defect, depends on the manner in which the rate gains are apportioned among the cooperating users. Specifically, the stability of the grand coalition (GC), i.e., the coalition of all users, is studied. Transmitter and receiver cooperation in an interference channel (IC) are studied as illustrative cooperative models to determine the stable coalitions for both flexible (transferable) and fixed (non-transferable) apportioning schemes. It is shown that the stable sum-rate optimal coalition when only receivers cooperate by jointly decoding (transferable) is the GC. The stability of the GC depends on the detector when receivers cooperate using linear multiuser detectors (non-transferable). Transmitter cooperation is studied assuming that all receivers cooperate perfectly and that users outside a coalition act as jammers. The stability of the GC is studied for both the case of perfectly cooperating transmitters (transferrable) and under a partial decode-and-forward strategy (non-transferable). In both cases, the stability is shown to depend on the channel gains and the transmitter jamming strengths.
Keywords :
channel coding; game theory; radio networks; radiofrequency interference; coalitional game theory; cooperative wireless networks; grand coalition; interference channel; multiuser detectors; partial decode-and-forward strategy; sum-rate optimal coalition; transmitter cooperation; transmitter jamming strengths; Costs; Decoding; Detectors; Information theory; Integrated circuit modeling; Interference channels; Jamming; Stability; Transmitters; Wireless networks; Coalitional games; cooperative communications; interference channel;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
DOI :
10.1109/JSAC.2008.080908