Network link detection and generation

a network link and detection technology, applied in the field of network link detection and generation, can solve the problems of inability to operate a mixed-protocol or “mixed-environment” system, infeasible or wasteful to upgrade only a portion of the system,

a network link and detection technology, applied in the field of network link detection and generation, can solve the problems of inability to operate a mixed-protocol or “mixed-environment” system, infeasible or wasteful to upgrade only a portion of the system,

USRE39116E1Inactive Publication Date: 2006-06-06NEGOTIATED DATA SOLUTIONS
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  • Network link detection and generation
  • Network link detection and generation
  • Network link detection and generation

Examples

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Embodiment Construction

[0031]Before describing link endpoint capability detection, a general description of one type of network will be provided as one example of a data communication system in which the present invention can operate. A data communication system can be configured in a star-topology with a plurality of nodes of 42a, 42b, 42c, (FIG. 2) each coupled to a hub 44a by data links comprising physical data transmission media such as one-way twisted pair wires 46a-46f. The number of nodes can be adjusted depending on the data transmission needs and objectives of the system. In one embodiment, each hub is configured to accommodate connection with up to 16 nodes. Each 42a, 42b, 42C includes circuitry 50a, 50b, 50c for receiving data, converting it to a form suitable for transmission onto the physical media 45a, 46c, 46e using transmitters 78a, 78b, 78c and receipt of signals from the physical media 46b, 46d, 46f using receivers 79a, 79b, 79c and conversion to a form suitable for use by the data sinks...

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Abstract

Support for a mixed network environment is provided which can contain multiple isochronous and / or non-isochronous LAN protocols such as Isochronous-Ethernet. Ethernet, isochronous-token ring, token ring, other isochronous-LAN or other LAN Systems. Support for a mixed environment includes a protocol detection mechanism which is embodied in a handshaking scheme. This handshaking scheme determines the signalling capability at the end points of the link and implements the correct protocol. This enables isochronous nodes and hubs to automatically detect the presence of Ethernet, token ring, or other LAN equipment at the other and of the network cable. If this detection occurs, the isochronous LAN equipment will fall-back to a LAN compliant mode of operation. Typically, only the hub will have the capability of operating at different networking modes, such as Ethernet, Token Ring isochronous modes. The hub will listen for some form of identification from the attached nodes as to the type of service to provide—isochronous or non-isochronous: Ethernet, token ring or other LAN service.

Description

[0001]This application is a continuation-in-part of U.S. Ser. No. 07 / 971,018, filed Nov. 2, 1992, abandoned for “Network Link Endpoint Capability Detection,” incorporated herein by reference.[0002]The present invention is directed to a method and apparatus for generating and detecting, in a network, such as a local area network, the link signals transmitted to or received from one or more endpoints of a data communication link, and in particular to a method and apparatus for generating one or a plurality of different link signals and determining whether a data source / sink at the end of a datalink has the capability of first data communication protocol or a second data communication protocol.BACKGROUND OF THE INVENTION[0003]A typical data communication network is configured to operate according to a single predetermined protocol, e.g., an Ethernet protocol, a token ring protocol, other LAN protocols, or an isochronous protocol. An example of an Ethernet system is an implementation kn...

Claims

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Application Information

Patent Timeline
06 Jun 2006
Publication
USRE39116E1
IPC
H04Q1/30; H04L12/44; H04L12/56; H04L12/64; H04L29/06; H04L29/08
CPC
H04L12/44; H04L12/6418; H04L49/205; H04L49/351; H04L2012/6437; H04L2012/6451; H04L2012/6454; H04L2012/6459
Inventors
SHIRANI, RAMIN; EDEM, BRIAN C.