802.16 支持的业务类型
Unsolicited grant service (UGS)
T1/E1 and Voice over IP without silence suppression
Real-time variable-rate (RT-VR) service
variable-size data packets that are issued at periodic intervals, such
as moving pictures experts group (MPEG) video
Extended real-time variable-rate (ERT-VR) service
support real-time applications with variable data rates, which requir
e guaranteed data and delay, for example VoIP with silence suppres
sion
Non-real-time variable-rate (NRT-VR) service
delay-tolerant data streams consisting of variable-size data packets
for which a minimum data rate is required, such as FTP
Best effort (BE) service
support data streams for which no minimum service level is require
d ， such as HTTP
