May 01, 2017

distributed channel probing and sequential access for ultra dense networks: joint spectrum- and energy-aware design

  • Cai L.
  • Guo H.

Ultra dense network (UDN) with universal resource reuse capability is recognized as a promising technology for 5G. In this paper, we advance a distributed channel probing and sequential access (DISCO-SEA) scheme for UDNs, which enables an autonomous procedure for network expanding by blending receiver-transmitter pairing, interference avoidance, spectrum sharing, power control, and admission control. The autonomous network expansion is carried out through spectrum-aware channel probing and energy-aware receiver-transmitter pairing, which are performed under a distributed recursive power computation framework based on power updating factors. In particular, the channel probing is designed to check expandability, whereby a closed-loop cognitive mechanism is resorted to exactly predict the surplus capacity an active network reserved for the unserved users. The active network accommodate the new link in favor of energy efficiency so that the expanded network can leave as much capacity margin for the next expansion as possible. Accordingly, an active network can be scaled up by continuously adding new links in a sequential manner. DISCO-SEA promises a joint spectrum- and energy-efficient UDN towards optimizing the system performance and guaranteeing individual minimum performance. Also, the recursive power computation is developed with a computation-aware signaling strategy, allowing for computation-information reuse and significant reduction in signaling overhead, computation time, and memory amount.

Recent Publications

January 01, 2018

Fair Dynamic Spectrum Management for QRD-Based Precoding with User Encoding Ordering in Downstream G.fast Transmission

In next generation DSL networks such as G.fast, employing discrete multi-tone transmission in high frequencies up to 212 MHz, the crosstalk among lines reaches very high levels. To precompensate the crosstalk in downstream transmission, QRD-based precoding has been proposed as a near-optimal dynamic spectrum management (DSM) technique. However, the performance ...

January 01, 2018

Practical Mitigation of Passive Intermodulation in Microstrip Circuits

This paper presents new experimental evidence and a novel practical approach for mitigation of passive intermodulation (PIM) in microstrip circuits fabricated on commercial printed circuit board laminates. The mechanisms of distributed PIM in microstrip circuits are reviewed and a phenomenology of PIM generation due to locally enhanced electromagnetic fields at ...

January 01, 2018

Efficient Cooperative HARQ for Multi-Source Multi-Relay Wireless Networks

In this paper, we compare the performance of three different cooperative Hybrid Automatic Repeat reQuest (HARQ) protocols for slow-fading half-duplex orthogonal multiple access multiple relay channel. Channel State Information (CSI) is available at the receiving side of each link only. Time Division Multiplexing is assumed, where each orthogonal transmission occurs ...