n
 nReal-time
 services for video and audio
 nCan not tolerate
 delays clearly observable by human (in order 200 ms or
 larger)
 nCan tolerate
 relatively large error rates
 nBlocking
 probability depends on number of customers in a service area
 nFixed rate
 data services require much non-reusable capacity:
 nFixed delay
 ndemanding error
 rate limit
 nHigh-latency
 data: 
 nLarge
 flexibility in delay
 ndemanding error
 rate limit
 n