Time-critical and delay-sensitive multimedia applications require more spectrum and
transmission resources. With the provision of cognitive radios (CRs), the underutilized …

This paper focuses on the current state of voice over Internet protocol in wireless mesh
networks. Mesh network formation is dynamic, unpredictable and self-healing. Thus, voice …

Large-scale antenna technology is a key technology for the fifth-generation mobile
communication (5G) system to improve capacity and spectrum utilization; meanwhile …

Real-time VoIP communication demands strong QoS assurance for its efficient performance.
Ensuring high quality of VoIP transmission in spectrally congested scenarios requires …

In Voice over Iternet Protocol (VoIP) applications, paquet loss is major source of speech
impairement. This work consists on using packet loss concealment methods based on …

The demand of wireless spectrum is increasing very fast as the field of telecommunication is
advancing rapidly. The spectrum was underutilized because of fixed spectrum assignment …

Appropriate pricing of channel bandwidths that are allotted to secondary users is an
important and challenging task in cognitive radio networks. It is usually carried out through …

This research has developed technique to improve the quality of service in wireless data
networks that employ spectrum utilization techniques based on Cognitive Radio. Most …

The conventional static spectrum allocation policy has resulted in a suboptimal use of
spectrum resources, leading to over-utilization in some bands and under-utilization in …