Combinatorial optimization: algorithms and complexity
Combinatorial optimization: algorithms and complexity
Computers and Intractability: A Guide to the Theory of NP-Completeness
Computers and Intractability: A Guide to the Theory of NP-Completeness
Proceedings of the 12th annual international conference on Mobile computing and networking
On exploiting diversity and spatial reuse in relay-enabled wireless networks
Proceedings of the 9th ACM international symposium on Mobile ad hoc networking and computing
Performance of cellular networks with relays and centralized scheduling
IEEE Transactions on Wireless Communications
Transmit power adaptation for multiuser OFDM systems
IEEE Journal on Selected Areas in Communications
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Enhanced data rates and connectivity are key requirements for providing ubiquitous mobile access in next-generation cellular networks. Relay-enabled cellular networks, marked by their adoption in IEEE 802.16j standard, have become a viable candidate in such an endeavor. Such relay networks not only provide multi-user and (OFDM) channel diversity gains that are available in conventional cellular systems, but also provide spatial reuse gains, arising from the simultaneous transmissions on different hops of the network on the same channel. However, the efficient exploitation of these gains, calls for intelligent scheduler design at the BS that must not only accommodate the multi-hop nature of the network, but also address the resulting significant overhead incurred in the form of feedback. In this work, we present relay-assisted scheduling algorithms that efficiently exploit the available diversity and spatial reuse gains at the cost of minimal feedback overhead. The proposed solutions improve performance over conventional approaches by over 50% along with a scalable feedback overhead that grows only with the number of relays in the network and not with the number of users.