Symbiotic Cognitive Relaying with mobile Secondary nodes in Cognitive Radio Networks

TL;DR

This paper introduces mobility into Symbiotic Cognitive Relaying with secondary nodes acting as relays in cognitive radio networks, deriving theoretical bounds on throughput and delay with mobile secondary users.

Contribution

It extends SCR by incorporating mobile secondary nodes and provides analytical bounds on throughput and delay for this new scenario.

Findings

Derived theoretical bounds on throughput and delay.

Introduced mobility pattern and routing strategy for secondary nodes.

Analytically determined minimum throughput and maximum delay.

Abstract

In a Symbiotic Cognitive Relaying (SCR) scenario, the Secondary users(SU) nodes can act as multihop relays to assist the communication between Primary User(PU) nodes in the case of a weak direct link. In return, the SU nodes are incentivised with the right to carry out SU-SU communication using licensed PU band for a fixed amount of time, referred to as the 'Time Incentive'. Existing work on SCR is constrained to a fixed ad-hoc SU network. In this paper, we introduce mobility in SCR by considering mobile SU nodes while keeping the PU nodes fixed. This paper uses a specific mobility pattern and routing strategy for the SU nodes to propose theoretical bounds on the throughput and delay of PU-PU transmission. We derive analytically the least throughput and maximum delay possible in our model.