Motorola Corporation

3com Corporation

Vijay J Nadkarni

Stanley T Naudus

Craig S Zaplatynsky

Richard Ng

Thomas A Gentles

Daniel L Schoo

Leland Otis Thompson

Ying Wu

Richard J Varman

Tom Gentles

Disclosed is an architecture for a network access server wherein a switching device is placed between a network gateway device and a first network, where the switching device detects the presence or absence of a security protocol field in the header information of data packets received from the first network and routes the data packets accordingly. When the security protocol field is absent, the switching device routes the data packet to the network gateway device for processing in accordance with a protocol service provided by the network access server. When the security protocol field is present, the switching device decrypts the data packet, processes the data packet in accordance with the protocol service provided by the network access server, and routes the data packet to another device within the network access server on the basis of decrypted address information within the data packet.

Apparatus and method for processing encrypted packets in a computer network device

A method and apparatus for distributing protocol processing among a plurality of computing platforms. Data communications equipment such as Remote Access Devices, Communication Servers, Terminal Servers, and Dial-up Routers provide single user or large-scale multiple user communication access to various computing environments. The equipment costs and performance of such access equipment is related to the amount of CPU processing capability and memory required to support the desired number of serial communication links. It is common to use protocols that terminate in their entirely in the same processing machine. This invention encompasses methods developed to increase the cost/performance capabilities of the communication equipment that supports these serial links, primarily by means of distributing the protocol processing for higher level protocols across multiple computing platforms, including devices such as modems. Examples of such higher level protocols include PPP, SLIP and RTP.

Distributed processing of high level protocols, in a network access server

A method and system for reflexive tunneling. One aspect of the invention includes a method for reflexive tunneling using hidden virtual tunnels. A first peer application sends data packets to a second peer application and intermediate network devices create a hidden virtual tunnel to send the data packets. The hidden virtual tunnel is &ldquo;hidden&rdquo; from the first peer application and the second peer application. The hidden virtual tunnels may allow supplemental services to be added to a network device such as a gateway in less time with less expense. Another aspect of the invention includes a method for reflexive tunneling using transparent virtual tunnels with multiple segments. A first peer application associated with a first network device on a first network with multiple communication channels sends data packets to a second peer application associated with a second network device on a second network over a pre-determined communications channel forming a first segment of transparent virtual tunnel. Intermediate network devices create a second segment of the transparent virtual tunnel, by adding headers to the data packets between the first and second networks. Reflexive tunneling with transparent virtual tunnels with multiple segments between the first and second networks, may allow peer applications on a network device with multiple communication channels on a communication link to communicate with other peer applications on other independent devices without confusion.

Method and system for reflexive tunneling

A contention free local area network includes a token passing control bus (102) and a data bus (104) coupled to a plurality of communication nodes ( 108, 112, 114, 116, 118, and 120). The control bus (102) allows for a transmit-enable token to be daisy-chained along the plurality of communication nodes. When one of the communication nodes wants to transmit a message, the node upon receiving the transmit-enable token holds the token until it transmits its message along a data bus (104) to the other communication nodes. Once the message is transmitted, the particular communication node releases the transmit-enable token, allowing the token to continue to be rotated among the plurality of communication nodes (108, 112, 114, 116, 118 and 120).

Contention free local area network

A method for optimizing allocation of telephone and communication resources in a trunked communication system (100) is accomplished in the following manner. Upon receiving a resource request, a communication resource allocator, determines whether the request is for a communication resource (trunking call) or for a telephone resource (telephone call). When the request is for a communication resource, the communication resource allocator, allocates a communication resource from a broadcast unit in a second set of broadcast units. If no communication resources are available in the second set of broadcast units, the communication resource allocator allocates a communication resource from a broadcast unit of a first set of broadcast units in a predetermined order, wherein the broadcast units in the first set are affiliated with a telephone resource and a communication resource.

Growing community of inventors

Naperville, IL, United States of America

Vijay J Nadkarni