Methods and apparatus for data communication

Details Methods and apparatus for data communication Methods and apparatus for data communication

2002-09-06

2009-12-29

Shah, Chirag G (Department: 2419)

Multiplex communications

Fault recovery

C370S356000

Reexamination Certificate

active

07639601

ABSTRACT:
Data communication apparatus including a port and a control entity. The control entity is operative to establish a connection with a remote entity over a first path and negotiate with the remote entity using in-band signaling over the first path establishment of a second path allowing the exchange of data between the data communication apparatus and the remote entity. The invention presents advantages from the standpoint of ease of implementation and bandwidth and resource savings. The use of an in-band messaging protocol to negotiate a establishment of the second path can be implemented generally in a straight forward manner. At the same time, the ability to transfer at least part of the connection to the second path avoids the drawbacks that would arise if that part of the connection were constrained to the first path. This feature allows the operator to take advantage of benefits provided by the second path but not available to the first path.

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Digital Cellular telecommunication system (phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Inband Tandem Free Operation (TFO) of speech codecs; Service Description; Stage 3 (3GPP TS 28.062 version 5.0.0 Release 5) ETSI TS 128 062 V5.0.0, Mar. 2002, pp. 14-19, 35-51, 56-59, 81-88, 164-168, XP 002248624 cited in the application section 4.2.1.
Partial International Search Report, PCT/CA03/00972, Nov. 3, 2003.

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