Communication of packet arrival times to cable modem...

Details Communication of packet arrival times to cable modem... Communication of packet arrival times to cable modem...

2006-12-05

2006-12-05

Nguyen, Chau (Department: 2616)

Multiplex communications

Communication over free space

Repeater

C370S443000, C370S516000

Reexamination Certificate

active

07145887

ABSTRACT:
A cable modem communicates the timing of the arrival of certain packets (such as TCP ACK packets) to a cable modem termination system. This timing feature is useful in methods for increasing the throughput in the downstream direction by eliminating TCP ACKs backing up at a cable modem. In particular, a cable modem termination system implementing an unsolicited bandwidth grant service in which unsolicited grants of bandwidth are sent by the cable modem termination system to the cable modem. The grants of bandwidth are timed to arrive at the cable modem simultaneous with or shortly after the arrival of the TCP ACK from an end station connected to the cable modem. Several methods of calculating or predicting when the unsolicited grants should be sent to the cable modem are described. The method is also applicable to other types of packets, such as voice packets from a end station implementing a Voice over Internet Protocol (VoIP) application.

REFERENCES:
patent: 6507592 (2003-01-01), Hurvig et al.
patent: 6657983 (2003-12-01), Surazski et al.
patent: 6698022 (2004-02-01), Wu
patent: 6950399 (2005-09-01), Bushmitch et al.
patent: 7024680 (2006-04-01), Howard
Data-Over-Cable Service Interface Specifications (“DOCSIS”), Radio Frequency Interface Specification, SP-RFI-104-980724, Interim Specification, Cable Television Laboratories, Inc. dated Jul. 24, 1998.

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