IEEE802.16 (L1) . , , MAC- (Medium Access Control).
IEEE 802.16 (). (service flow) -.
, , . MAC-, (.12.1). .
, . ( ) . () IP. (QoS) IEEE 802.16. - .
- IEEE 802.16 (.12.1):
- (CS - Convergence Sublayer);
- (CPS - Common Part Sublayer);
- (PS - Privacy Sublayer)
.12.1. - IEEE 802.16
, / . .
WiMAX. . L2 : , , IEEE 802.3 (Ethernet).
QoS (Quality of Service). QoS :
- ,
- ,
- ,
- : ,
- ( )
(service flow) SFID (Service Flow Identifier) (32 ). SFID QoS, . , , .
QoS (scheduler). , . (→) . (→) 5 . (polling) , :
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UGS Unsolicited Grant Service: (1) VoIP; 5 10 BER = 10-6 10-4,
ertPS extended real time Polling Service, ,
rtPS real time Polling Service: (, ),
nrtPS non-real-time Polling Service: ,
BE Best Effort: .
.12.2 , .
- PDU - PDU |
- - - - / - (QoS) - - / - |
- - - - |
.12.2. .
PHS (Payload Header Suppression) IP- , .
SDU (Service Data Unit). (.12.2) SDU PDU (Protocol Data Unit), SDU, , PDU. MA PDU . CID (Connection Identifier) 16 . SFID CID.