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Dynamic spectrum access (DSA) is an important design aspect for the cognitive radio networks. Most of the existing DSA schemes are to govern the unlicensed user (i.e., secondary user) traffic in a licensed spectrum without compromising the transmissions of the licensed users, in which all the unlicensed users are typically treated equally. In this paper, prioritized unlicensed user traffic is considered...
This paper firstly introduces the mesh structure of IEEE 802.16, explains the three-way handshaking mechanism under the mesh structure, then questions the conflict problem existing in the previous protocols, and proposes a method to improve the three-way handshaking mechanism. According to simulation results, it performs well, not only shorten end to end delay, but also increase throughput.
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