In-band quality-of-service signaling to endpoints that...

Details In-band quality-of-service signaling to endpoints that... In-band quality-of-service signaling to endpoints that...

2011-07-19

2011-07-19

Ferris, Derrick W (Department: 2463)

Multiplex communications

Data flow congestion prevention or control

Flow control of data transmission through a network

Reexamination Certificate

active

07983170

ABSTRACT:
IP packets are scheduled at source devices such as cell phones on a private network that connect to the Internet at an edge device. A private traffic controller by the edge device detects pre-Internet congestion on the private network. The private traffic controller uses in-band piggybacked signaling of policy changes by intercepting return packets to the source devices and modifying bits such as DSCP bits in the header. Source traffic controllers in the source devices read the modified DSCP bits and implement specified policy changes, dropping or delaying packets at the source device before transmission. Congestion on RF links from cell phones is reduced by the source traffic controllers dropping packets before transmission. The source device limits or drops future packets in response to the policies signaled by the DSCP bits. Rather than indicate the existing packet's priority, private DSCP bits signal policy changes to the source device.

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