Resource allocation for outage probability minimisation in cognitive radio multicast networks

2014 ◽  
Vol 27 (1) ◽  
pp. 51-63 ◽  
Author(s):  
Ding Xu ◽  
Qun Li
Keyword(s):  
Resource Allocation ◽  
Cognitive Radio ◽  
Outage Probability ◽  
Multicast Networks

Outage Analysis in Underlay OFDMA Based Cooperative Cognitive Radio Networks

2020 ◽  
Vol 10 (4) ◽  
pp. 625-633
Author(s):  
Rupali Sawant ◽  
Shikha Nema
Keyword(s):  
Resource Allocation ◽  
Cognitive Radio ◽  
Outage Probability ◽  
Cognitive Radio Network ◽  
Base Station ◽  
Data Rate ◽  
Subcarrier Allocation ◽  
Radio Network ◽  
Cooperative Cognitive Radio Networks ◽  
High Data

Background: Efficient resource allocation in Cooperative Cognitive Radio Network (CCRN) is necessary in order to meet the challenges in future wireless networks. With proper resource allocation, the Quality of Service (QoS) comprising of outage probability and data rate are evaluated in this paper and sufficiently improved with proper subcarrier allocation. Objective: Another important parameter is Signal to Interference Ratio (SIR) which should be above a threshold called minimum protection ratio to maintain the required QoS. Results: The network considered is Orthogonal Frequency Division Multiple Access (OFDMA) based Hybrid Cooperative Cognitive Radio Network (HCCRN) in downlink in which licensed as well as unlicensed resources are used by cognitive user depending on it’s availability keeping the interference constraint in limit. The number of subcarriers required is different for every user depending upon its distance from the base station to satisfy the requirement of data rate which depends on the experienced SIR. To avoid outage of users at the boundary of a cell, it is necessary to allocate more number of subcarriers. Conclusion: It is observed that for a given user position and outage probability, as the number of subcarrier allocation in a subchannel increases high data rates can be achieved. This analysis can be useful in allocation of subcarriers to users depending upon their position.

Sign in / Sign up

Export Citation Format

Share Document