King Fahd University of Petroleum and Minerals

Anas M Salhab

Salam Adel Zummo

Mohamed-Slim Alouini

Mohanad Obeed

Ahmed A Al-Habob

The disclosure provides a method of relaying a transmission between a source device and a destination device in a wireless communication network where one or more unmanned aerial vehicles (UAVs) in a plurality of UAVs have been activated to relay the transmission between the source device and the destination device. The method includes calculating a sum of SNRs associated with the one or more UAVs and determining whether the sum of the SNRs is less than a predetermined threshold. The method further includes, when the sum of the SNRs is less than the predetermined threshold, determining whether there is at least one UAV in the plurality of UAVs that has not been activated to relay the transmission. Also, the method includes, when there is at least one UAV that has not been activated to relay the transmission, activating one of the at least one UAV to relay the transmission.

Apparatus and method to relay a transmission

Joint power allocation and cell formation for energy efficient (EE) visible light communication (VLC) networks is described. A set of rules for clustering users and then associating all the access points (APs) to the clustered users based on a proposed metric is developed. The energy efficiency is maximized by allocating power to users based on quality of service (QoS) constraints. The present disclosure jointly allocates the power and decides which APs must participate in communication and which ones must be switched off to minimize inter-cell interference. Numerical results demonstrate a significant improvement in energy efficiency compared to the traditional methods of clustering and AP assignment.

Method for joint power allocation in a communication network

Joint power allocation and cell formation for energy efficient (EE) visible light communication (VLC) networks networks is described. A set of rules for clustering users and then associating all the access points (APs) to the clustered users based on a proposed metric is developed. The energy efficiency is maximized by allocating power to users based on quality of service (QoS) constraints. The present disclosure jointly allocates the power and decides which APs must participate in communication and which ones must be switched off to minimize inter-cell interference. Numerical results demonstrate a significant improvement in energy efficiency compared to the traditional methods of clustering and AP assignment.

System for joint power allocation and cell formation in a visible light communication network

Cell clustering and power allocation for energy-efficient VLC networks

A simultaneous wireless information and power transfer relaying network system includes a source, a relay and a destination node. An overall time slot constituting a relaying protocol of the system includes a first time slot assigned for the source and a second time slot assigned for the relay, where at least a part of the first time slot is assigned for an information transmission from the source to the relay. A time duration of the second time slot is greater than a time duration of the at least part of the first time slot assigned for the information transmission from the source to the relay. A method of communication for the SWIPT relaying network system includes determining a structure of the overall time slot including ratios of time durations of subparts of the overall time slot.

Communication method for information and power transfer

The present disclosure relates to a triple-hop multiuser relay network. Further, the relay network is comprised of mixed communication mediums (radiofrequency/free-space optical/radiofrequency), and utilizes a generalized order user scheduling scheme for determining the next source or destination to be selected for transmission. Closed-form expressions were achieved to describe outage probability, average symbol error probability, and channel capacity assuming Rayleigh and Gamma-Gamma fading models for the radiofrequency and free-space optical links, respectively. The effects of pointing errors on the free-space optical link were also considered. Additionally, a power allocation algorithm was proposed to optimize power allocation at each hop.

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Dhahran, Saudi Arabia

Anas M Salhab