05946322 is referenced by 106 patents and cites 20 patents.

An asymmetric network communication system for use in a client-server environment having independent forward and return channels operating at different speeds and/or under different protocols on the same or different communication media to provide efficient utilization of shared resources. A network manager, such as a hybrid access system, effects transmission of packetized data on a forward (downstream) channel from the host server to multiple client devices coupled with a shared downstream media at 10 or more megabits per second while simultaneously providing selectable multiple lower speeds of operation on shared or dedicated return (upstream) channels from the client devices to the host server depending on bandwidth availability, bandwidth demand, service level authorization, etc. for the return channel. Forward and return channels may be located on the same or different communication medium including a CATV network, direct broadcast satellite network, television or radio RF broadcast network, wireless or mobile cellular facilities or the like. The return channel may reside on a PSTN either directly coupled with the host server or connected with the network manager for subsequent transmission to the host server. The network manager handles or controls the forward and return communication to establish interactive full-duplex real-time network sessions between the host and a selected client device. The network manager switches upstream channel assignment based on quality of signals transmitted to the host, effects changes in the upstream transmitted power based on sensed conditions, and automatically configures new client devices as they are added to the network. The system issues data transmission credits to client devices for enabling them to independently transmit data without supervision up to their allowed credit limit thereby reducing polling for channel allocation requests.

Title
Hybrid access system utilizing credit/done polling protocols
Application Number
426920
Publication Number
5946322
Application Date
August 27, 1996
Publication Date
August 31, 1999
Inventor
Frederick Enns
Menlo Park
CA, US
Robert A Luxenberg
Woodside
CA, US
Robert L Packer
Los Gatos
CA, US
Jan Maksymilian Gronski
Palo Alto
CA, US
Eduardo J Moura
San Jose
CA, US
Agent
Kile McIntyre&Harbin
Assignee
Hybrid Networks
CA, US
IPC
H04J 3/16
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