MULTIMEDIA COMMUNICATION OVER CONITIVE RADIO NETWORKS

Multimedia communication over cognitive radio networks

Multimedia communication:
               Multimedia communication includes different form of communication.It is the transmission that combine media of communication.Transmission is by means of transmitted signal.

Example:
   •Video conference 
   •World Wide Web 
   •Online games
   •E-mail 

Cognitive radio networks:

              Cognitive radio network is a wireless communication.In this,a transreceiver will detect the communication channel which are in use.So that it moves to the vaccant channel and it could avoid occupied channel.This optimizes the use of available radio-frequency (RF) spectrum while minimizing interference to other users.

                               

Multimedia Communication over Cognitive Radio Networks from QoS/QoE Perspective

• The stringent requirements of wireless multimedia transmission lead to very high radio spectrum solicitation. 
• Although the radio spectrum is considered as a scarce resource, the issue with spectrum availability is not scarcity, but the inefficient utilization. 
• Unique characteristics of cognitive radio (CR) such as flexibility, and interoperability, particularly have contributed to it being the optimum technological candidate to alleviate the issue of spectrum scarcity for multimedia communications. 
• However, multimedia communications over CR networks (MCRNs) as a bandwidth-hungry, delay-sensitive, and loss-tolerant service, exposes several severe challenges specially to guarantee quality of service (QoS) and quality of experience(QoE).

Multimedia communications over cognitive radio networks for smart grid applications 

     •Remote system monitoring
     •Automatic meter reading
     •Remote home/customer site monitoring
     •Equipment fault diagnosing

Wireless communication plays major role in these smart grid applications.Many smart grid applications face harsh environmental conditions but have high reliability and low latency requirements.It requires careful research and customised communication and networking solutions.

Example: 
           Huge amount of data related to monitoring and control will be transmitted across smart grid wireless communication infrastructures, with intensive interference and increasing competition over the limited and crowded radio spectrum for the existing wireless networking standards. The versatile features of cognitive radio technology satisfy the requirements of smart grid communications.But there are growing needs of multimedia applications via smart grid communication infrastructures that require large bandwidth and network resources.