Clear channel access methods, apparatuses, media and signals

Details Clear channel access methods, apparatuses, media and signals Clear channel access methods, apparatuses, media and signals

2005-02-22

2005-02-22

Cangialosi, Salvatore (Department: 2621)

Multiplex communications

Pathfinding or routing

Through a circuit switch

C370S539000

Reexamination Certificate

active

06859453

ABSTRACT:
Methods, apparatuses, media and signals for providing clear channel access on a network are disclosed. A first method involves receiving a communication signal from a remote network element. The communication signal includes a previous transport overhead (PTOH) portion indicative of transport overhead contents of the communication signal prior to arrival at the remote network element, and a previous path error (PPE) portion indicative of path errors present in the communication signal at the remote network element. The method then involves modifying a transport overhead portion of the communication signal in response to the PTOH and PPE portions. A second method involves inserting into a communication signal received at a network element, a previous transport overhead (PTOH) portion indicative of transport overhead contents of the communication signal prior to arrival at the network element, and a previous path error (PPE) portion indicative of path errors present in the communication signal at the network element. The second method then involves transmitting the communication signal to a remote device.

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International Telecommunication Union Standard, ITU-T, Rec. G. 707, “Network Node Interface for the Synchronous Digital Hierarchy (SDH)”, pp. 90-114, Mar., 1996.

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