Richard H Crump, 67Lowell, MA

6484206, Nov 19, 2002

Oct 7, 1998

09/167746

Richard Crump - Boston MA
Todd Short - Maynard MA

Nortel Networks Limited - St. Laurent

G06F 1516

709227, 709223, 709230, 709237, 709250, 370401, 370466, 370467, 714 4

An efficient technique for recovering multiple connections detects a connection failure affecting multiple clients, selects one of the number of affected clients, repeatedly attempts to reestablish the failed connection between the selected client and the server until the connection is successfully re-established, and then re-establishes the connections for the remaining clients.

6581175, Jun 17, 2003

Dec 27, 1999

09/472668

Richard Crump - Boston MA
Janet Doong - Chelmsford MA
Xiangrong Cai - Billerica MA

Nortel Networks Limited

H04L 116

714748

An apparatus and method of requesting retransmission of at least a portion of a message (having a plurality of message segments) from a sender utilizes message units in a memory device for storing data relating to retransmit messages. In particular, each message unit in the memory has data for one message segment. To that end, a retransmit message requesting retransmission of a set of message segments to a given receiver is received from the given receiver. The given retransmit message then is parsed to determine both the identity of the given receiver, and the identity of the set of message segments requested by the given receiver. A message unit then is produced in the memory for each of the set of message segments that does not have an existing message unit in memory. Data representing the identity of the given receiver then is added to all message units for the set of message segments.

6618359, Sep 9, 2003

Oct 7, 1998

09/167950

Yue Long Chen - Nashua NH
Richard Crump - Boston MA
Mark F. Leary - Franklin MA

Nortel Networks Limited - St. Laurent

H04L 1226

370242, 370401, 370466

A method, translating apparatus, apparatus comprising a computer readable medium, and system for error recovery in a mixed protocol communication network includes a translation function that communicates with a first device using a first communication protocol and a second device using a second communication protocol. When the translation function determines that a connection failure occurred between the translation function and the second device, the translation function completes a first link reset procedure with the first device to suspend data flow between the first device and the translation function, completes a connection establishment procedure with the second device to establish a connection between the translation function and the second device, and then completes a second link reset procedure with the first device to enable data flow between the first device and the translation function.

6757731, Jun 29, 2004

Jan 6, 2000

09/478391

Frank Barnes - Nashua NH
Sandipan Basu - Burlington MA
Donald McGinley - New Boston NH
Richard Crump - Boston MA
Arvind Kukreja - Burlington MA

Nortel Networks Limited

G06F 1516

709227, 709230, 709236, 709240, 370469, 370389

A system, device, and method for interfacing multiple protocol stacks in a communication network utilizes a virtual circuit subsystem to interconnect protocol stacks internally within a network device. The virtual circuit subsystem establishes a virtual connection between at least a first protocol of a first protocol stack and a second protocol of a second protocol stack. The virtual circuit subsystem enables messages to be exchanged between the first protocol of the first protocol stack and the second protocol of the second protocol stack over the virtual connection. Specifically, the virtual circuit subsystem converts a transmitted message received from the first protocol into a received message for the second protocol, and converts a transmitted message received from the second protocol into a received message for the first protocol.

6823386, Nov 23, 2004

Feb 24, 2000

09/511847

Richard Crump - Boston MA
Janet Yung Doong - Chelmsford MA

Nortel Networks Limited

G06F 1300

709227, 709224

A single address configuration table entry maps multiple source devices in a source network to a single destination device in a destination network. The single address configuration table entry is used when any of the source devices initiates a connection to the destination device. The single address configuration table entry includes a âwildcardâ for matching the source address of connection requests that are originated by any of the multiple source devices and destined for the destination device. When a connection is initiated by a source device, certain address/channel information is dynamically allocated in order to map the source device to the destination device. A dynamic routing table entry is installed in a dynamic routing table in order to map the source device to the destination device using the dynamically allocated address/channel information.

6879993, Apr 12, 2005

Feb 24, 2000

09/512576

Richard Crump - Boston MA, US

Nortel Networks Limited

G06F015/16

709203, 709239, 709238, 709223, 370229, 370230, 370474

Each connection-oriented client in a network device is bound to its own communication channel. The communication channel may be an X. 25 logical channel having a single virtual circuit.

6892245, May 10, 2005

Sep 22, 2000

09/667460

Richard Crump - Boston MA, US
Timothy Cunningham - Groton MA, US
Joseph Flaherty - Westborough MA, US
Manish Patel - Tyngsboro MA, US

Nortel Networks Limited

G06F013/00

709245, 709223, 709238, 709249

A management information base (MIB) for a multi-domain network address translator provides management objects for configuring and controlling the multi-domain network address translator. The MIB includes management objects for defining a domain-specific source address filter range, which is a range of addresses used to detect domain-specific packets that require domain-specific network address translation forwarding. The domain-specific source address filter management objects include a beginning address, a prefix length, a domain indicator, and a domain-specific translation pool indicator. The MIB also includes management objects for defining a domain-specific translation pool, which is a range of addresses from which domain-specific translation addresses are selected for domain-specific network address translation forwarding. The domain-specific translation pool management objects include a beginning address, a prefix length, and a domain indicator.

6999454, Feb 14, 2006

Jan 17, 2002

10/052128

Richard H. Crump - Boston MA, US

Nortel Networks Limited

H04L 12/28
H04L 12/56

370389, 370473, 370474, 712 1, 712220, 712223, 710306, 709238

An information routing system and apparatus includes separate control and forwarding planes. The control plane is split into box management control functions and routing control functions. The box management control functions are isolated to a single processing card, while the routing control functions are distributed across multiple processing cards. The routing table is also distributed across multiple processing cards. The multiple processing cards are interconnected via a high-speed backplane bus for control plane traffic and by a fabric for forwarding plane traffic.