Guaranteed QoS access by Packet-by-Packet Generalized Processor Sharing with channel errors and long propagation

In this paper the PGPS/RAP multiaccess proposed in [16] is reinvestigated for realistic channel characteristics such as unreliable transmission and propagation delay effect. With our proposed link control scheme, the packet error rate of PGPS/RAP in an unreliable channel can be effectively improved while the packet delay for constant-bit-rate (CBR), variable-bit-rate (VBR) traffic is still guaranteed. Furthermore, with the technique of pipelining, we modify the PGPS/RAP to adapt the long propagation delay effect for guaranteed QoS access to CBR and VBR traffic of the end-users. This modified PGPS/RAP without any specific frame concept can still guarantee worst-case jitter of CBR and VBR traffic sources and therefore can guarantee the QoS of jitter-sensitive CBR and VBR sources.