This article presents a dynamic random access scheme for orthogonal frequency division multiple access （OFDMA） systems. The key features of the proposed scheme are it is a combination of both the distributed and the...This article presents a dynamic random access scheme for orthogonal frequency division multiple access （OFDMA） systems. The key features of the proposed scheme are it is a combination of both the distributed and the centralized schemes, it can accommodate several delay sensitivity classes, and it can adjust the number of random access channels in a media access control （MAC） frame and the access probability according to the outcome of Mobile Terminals access attempts in previous MAC frames. For floating populated packet-based networks, the proposed scheme possibly leads to high average user satisfaction.展开更多
文摘This article presents a dynamic random access scheme for orthogonal frequency division multiple access （OFDMA） systems. The key features of the proposed scheme are it is a combination of both the distributed and the centralized schemes, it can accommodate several delay sensitivity classes, and it can adjust the number of random access channels in a media access control （MAC） frame and the access probability according to the outcome of Mobile Terminals access attempts in previous MAC frames. For floating populated packet-based networks, the proposed scheme possibly leads to high average user satisfaction.
