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

May 22, 2017

Multidimensional Resource Allocation in NFV Cloud

  • Goldstein M.
  • Raz D.
  • Segall I.

Network Function Virtualization (NFV) is a new networking paradigm in which network functionality is implemented on top of virtual infrastructure deployed over COTS servers. One of the main motivations for the shift of telco operators into this paradigm is cost reduction, thus the efficient use of resources is an important ...

May 20, 2017

The Actual Cost of Software Switching for NFV Chaining

  • Caggiani Luizelli M.
  • Raz D.
  • Saar Y.
  • Yallouz J.

Network Function Virtualization (NFV) is a novel paradigm allowing flexible and scalable implementation of network services on cloud infrastructure. An important enabler for the NFV paradigm is software switching, which needs to satisfy rigid network requirements such as high throughput and low latency. Despite recent research activities in the field ...

May 08, 2017

Coexistence-aware dynamic channel allocation for 3.5 GHz shared spectrum systems

The paradigm of shared spectrum allows secondary devices to opportunistically access spectrum bands underutilized by primary owners. As the first step, the FCC targeted sharing the 3.5 GHz (3550–3700 MHz) federal spectrum with commercial systems. The proposed rules require a Spectrum Access System to implement a three-tiered spectrum management framework, ...