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Standalone Long Term Evolution in unlicensed band (SA LTE-U) is a promising technology to address the scarcity of licensed band. For SA LTE-U system, we design a novel random access protocol, and propose an algorithm to calculate the optimal number of Random Access Channels (RACHs) which balances the resources between RACHs and Uplink Shared Channels (UL-SCHs). Specifically, we formulate an optimization...
In this paper, with the cross-layer design principle, a novel cooperative triple busy tone multiple access (CTBTMA) scheme is proposed for wireless networks to achieve cooperative diversity gain. A utility-based algorithm is presented to determine the capability of a node in helping other nodes' transmissions. With the use of three busy-tone channels, not only collisions can be avoided, but also an...
Multi-user multiple-input multiple-output (MIMO) systems have been emerging and attracting considerable attention recently for its potential to substantially improve system capacity via space division multiple access. In this paper, we propose a distributed multi-user (MU) medium access control (MAC) protocol for wireless local area networks (WLANs) with MIMO capability, using a leakage-based preceding...
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