Channel Allocation in OFDMA based Wireless
نویسنده
چکیده
Wireless ad hoc networks find great utility in situ ations where there is no wired base station infrastructure. For large networks wireless channel access needs to be performed in adistributed mann er. Orthogonal Frequency Division Multiple Access (OFDM A) is an emerging multiple access technique that is used in several new networking technologies. In this paper we study the use of OFDMA for ad hoc networks. Each point-to-point link does not ransmi t over the ntire band and uses aubset of the tot al number of available subcarriers. This enables flexi ble network resource management with the ability to vary the output link capacity depending on the traf fic load. Specifically, we address the problem of subcarrier allocation for point-to-point links of a d hoc networks. We present a distributed algorithm for subcarrier allocation and compare its performance t o a centralized graph-theoretic heuristic. The simu lation results also show that our protocol is robust and s calable.
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