Important Trends
Multimedia / Voice over IP networks
- Lower cost, more flexible packet-switching core network
- Simultaneous delay sensitive and delay insensitive flows (RSVP, Class-based Queuing, Link Scheduling)
Intelligence shifts to the network edges
- User-implemented functionality
Programmable intelligence inside the network
- Proxy servers intermixed with switching infrastructure
- TACC model & Java code: “write once, run anywhere”
- Rapid new service development
- Speech-based services
Implications for cellular network infrastructure of the 21st century?
- High BW data (384 Kb/s-2 Mb/s): Reliable Link Protocols