NGN 
            Multimedia Services
			
			
			The next 
            generation telecommunications network (NGN) based on an IP platform 
            is expected to enable advanced multimedia services such as those in 
            Table 1.
			
			
            
              
                | 
                 Multiparty multimedia 
                conferencing  | 
                
                 Multiple parties 
                interact using voice, media streaming/video, and/or data. 
                Customers can converse with each other while displaying visual 
                information.  | 
               
              
                | 
                 Collaborative 
                computing  | 
                
                 Computer resources, 
                documents, applications, and groupware tools can be shared for 
                interactive work efforts.  | 
               
              
                | 
                 Distance learning  | 
                
                 Users can take 
                interactive courses from remote locations. These courses can be 
                offered in either a computer-based training or live virtual 
                classroom environment.  | 
               
              
                | 
                 Data services  | 
                
                 Real-time 
                establishment of data connectivity between endpoints, providing 
                new switched circuit flexibility for customers who had 
                previously been limited to pe manent circuits.  | 
               
              
                | 
                 Virtual private 
                network (VPN)  | 
                
                 Data VPN services 
                expand upon the traditional PSTN VPN services and provide added 
                security and networking features that allow customers to use a 
                shared IP network as a closed user group.  | 
               
              
                | 
                 Public network 
                computing  | 
                
                 Businesses and 
                consumers utilize generic processing and storage capabilities 
                provided by the net work for such activities as hosting web 
                pages; storage, maintenance, and backup of data; andapplications 
                access.  | 
               
              
                | 
                 Information brokering  | 
                
                 Services that enable 
                consumers to be matched with providers through advertising, 
                finding, and providing information. For example, consumers could 
                receive information based on pre-specified criteria or based on 
                personal preferences and behavior patterns in addition to direct 
                subscription.  | 
               
              
                | 
                 E-commerce  | 
                
                 Businesses and 
                consumers can purchase goods and services electronically over 
                the network. This could include processing transactions, 
                verifying payment information, providing security, and possibly 
                trading for goods and services. Consumer services include Home 
                Banking and Home Shopping. Business-to- business applications 
                include supply-chain management and knowledge management 
                applications.  | 
               
              
                | 
                 Interactive games  | 
                
                 Consumers can meet 
                online and play video games interactively complete with a set of 
                interactive communication tools.  | 
               
             
             
            Table 1. NGN 
            multimedia services 
			
			
            
            Within this 
            context, basically three kinds of applications can be distinguished: 
            
              - 
            
            ·        
            
            
              Elastic applications: Generate discrete media traffic(e.g. 
            file transfers, www)
 
              - 
              
              ·        
              
              
              Adaptive applications:  
				Generate continuous media traffic 
              (e.g. video and audio),
 
              - 
              
              ·        
              
              
              Critical applications: Generate continuous media traffic 
              (e.g., teleteaching, teleconferencing, medical telediagnostics, 
            video/entertainment on demand, and distributed games )
 
              - 
              
              ·        
              
              
              intolerant applications 
               
              (e.g., interactive games, some control applications)
 
              - 
              
              ·        
              
              
              
				tolerant applications 
            (e.g., interactive voice applications).
 
             
		
		
		
		
			 
 
		
			 |