Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2004-09-09
2008-11-11
Jain, Raj K (Department: 2616)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S431000, C370S432000, C370S390000, C370S231000, C370S230000, C370S235000, C370S466000, C370S467000, C370S473000, C370S474000, C370S476000
Reexamination Certificate
active
07450579
ABSTRACT:
Downstream synchronous multichannel (DSSM) communications are provided among a plurality of carriers, each being a completely DOCSIS™ 2.0-compliant downstream. The synchronous multichannels support communications with both DSSM-capable communications nodes and non-DSSM-capable communications nodes (e.g., legacy cable modems). Non-DSSM packets are transmitted on a single channel. DSSM packets are split into multiple pieces, which are transmitted simultaneously on all available channels. Since the physical delay variation (e.g., group delay change) across the adjacent carriers is small (on the order of a symbol time), the multiple pieces arrive at the receiving communications nodes at nearly the same time and can be reassembled with minimal buffering and no packet ordering problems. To avoid causing trouble for the non-DSSM-capable communications nodes, the packet pieces are encapsulated with a header that causes the non-DSSM-capable communications nodes to silently discard them.
REFERENCES:
patent: 2003/0206554 (2003-11-01), Dillon
patent: 2004/0218623 (2004-11-01), Goldenberg et al.
Horton, Jr. John D.
Howard Daniel H.
Pantelias Niki R.
Prodan Richard S.
Pullen David M.
Broadcom Corporation
Jain Raj K
Sterne Kessler Goldstein & Fox PLLC
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