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

June 04, 2017

A New PRACH Transmission Scheme in Unlicensed Spectrum

  • Luo Z.
  • Meng Y.
  • Tao T.

For the unlicensed spectrum, the occupied bandwidth requirement is demanded by some regulations. The legacy scheme of Physical Random Access Channel (PRACH) for Long Term Evolution (LTE) cannot satisfy it. In this paper, we propose a novel PRACH transmission scheme to satisfy the requirement of unlicensed spectrum based on preamble ...

June 01, 2017

Mutual service processes in Euclidean spaces: existence and ergodicity

  • Baccelli F.
  • Mathieu F.
  • Norros I.

Consider a set of objects, abstracted to points of a spatially stationary point process in R-d, that deliver to each other a service at a rate depending on their distance. Assume that the points arrive as a Poisson process and leave when their service requirements have been fulfilled. We show ...

June 01, 2017

Incentivizing social media users for mobile crowdsourcing

  • Aiello L.
  • Karaliopoulos M.
  • Koutsopoulos I.
  • Micholia P.
  • Morales G.
  • Quercia D.

We focus on the problem of contributor-task matching in mobile crowd-sourcing. The idea is to identify existing social media users who possess domain expertise (e.g., photography) and incentivize them to perform some tasks (e.g., take quality pictures). To this end, we propose a framework that extracts the potential contributors' expertise ...