Cisco Cisco Packet Data Gateway (PDG) Documentation Roadmaps
CDMA2000 Wireless Data Services
Features and Functionality—Base Software ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22938-01
Allows the use of small packets for delay sensitive low data-rate traffic
Decreases header overhead
Reduces packet loss rate over lossy links
Description
The system supports the Van Jacobson (VJ) IP header compression algorithms by default for subscriber traffic.
The VJ header compression is supported as per RFC 1144 (CTCP) header compression standard developed by V.
Jacobson in 1990. It is commonly known as VJ compression. It describes a basic method for compressing the headers of
IPv4/TCP packets to improve performance over low speed serial links.
Jacobson in 1990. It is commonly known as VJ compression. It describes a basic method for compressing the headers of
IPv4/TCP packets to improve performance over low speed serial links.
By default IP header compression using the VJ algorithm is enabled for subscribers. You can also turn off IP header
compression for a subscriber.
compression for a subscriber.
Important:
For more information on IP header compression support, refer IP Header Compression chapter in
System Enhanced Feature Configuration Guide.
DSCP Marking
Provides support for more granular configuration of DSCP marking.
For different Traffic class, the PDSN supports per-service and per-subscriber configurable DSCP marking for Uplink
and Downlink direction based on Allocation/Retention Priority in addition to the current priorities.
and Downlink direction based on Allocation/Retention Priority in addition to the current priorities.