James E Mathis

US Patent:

6597919, Jul 22, 2003

Filed:

Jun 23, 2000

Appl. No.:

09/602327

Inventors:

Surender Kumar - Schaumburg IL
James Mathis - Barrington IL
Bhavesh G. Patel - Naperville IL
Gary J. Aitkenhead - Bramley, GB
Mark Shaughnessy - Phoenix AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 700

US Classification:

455510, 455452, 455445, 370230

Abstract:

A method and system for optimal radio channel management in a distributed connection and transport network. The method includes the steps of determining the quality of service required by a communication session, determining whether transport resources are available for immediate use by the communication session, and queuing the communication session for assignment to transport resources in accordance with the quality of service required and the availability of transport resources for immediate use. The system includes a set of assignable transport resources, an interface for requesting a communication session, a detection processor in communication with the interface for determining the quality of service required by the session, a resource processor in communication with the detection processor determining whether transport resources are available for immediate use by the session, and a queuing processor in communication with the resource processor holding the communication session for prioritized allocation to the transport resources.

US Patent:

6697349, Feb 24, 2004

Filed:

Aug 30, 2001

Appl. No.:

09/945459

Inventors:

James E. Mathis - Barrington IL
Mark L. Shaughnessy - Phoenix AZ
Surender Kumar - Schaumburg IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 724

US Classification:

370338, 370390, 370432, 370331, 455518, 455524

Abstract:

A wireless communication system comprises a connectionless packet network coupled to a plurality of sites that are in location areas. The sites join respective location area multicast addresses to receive messages from other sites in their location area. Communication units desiring to participate in talkgroup calls need only to register affiliation with a first site of the location area. Upon the first site receiving an affiliation message, it joins a payload multicast group address to receive payload for the talkgroup. In alternative embodiments, the first site sends, via the location area multicast address, either control message(s) or tunneled payload associated with the talkgroup call to secondary site(s) of the location area. The sites initiate paging sequences to determine whether communication units at their sites desire to participate in the call and, based on the responses, the sites may deliver stored payload and/or join the payload multicast group address to receive payload for the call. In this manner, a centralized entity such as a VLR is not needed to keep track of communication units in the location area.

US Patent:

6798755, Sep 28, 2004

Filed:

Dec 31, 2002

Appl. No.:

10/334523

Inventors:

Ross J. Lillie - Hoffman Estates IL
Matthew Keller - Algonquin IL
James E. Mathis - Barrington IL
Donald G. Newberg - Hoffman Estates IL
Bryan Thale - Algonquin IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04L 1228

US Classification:

370312, 370270, 370338, 370462, 370352, 709227, 709228, 709229

Abstract:

A method for controlling and managing individual directed sessions between at least two endpoints in a communications system. The method including the steps of: intercepting a first message sent from an initiating endpoint via application layer routing to at least one other endpoint requesting an individual directed session; communicating the requested individual directed session to a service entity for determining the state of the session as a function of communication system resources and capabilities and resources of the endpoints to be included in the requested session, and if the requested individual directed session is accepted determining a set of corresponding session parameters; and communicating the state of the requested individual session to the initiating endpoint via application layer routing, and if the requested session is accepted also communicating the state of the session the at least one other endpoint via application layer routing.

US Patent:

6993327, Jan 31, 2006

Filed:

Oct 29, 2001

Appl. No.:

10/038185

Inventors:

James Earl Mathis - Barrington IL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04M 3/42

US Classification:

4554141, 4554121, 455466, 370390

Abstract:

The present invention is a system, method and network () for multicast distribution of presence information to a plurality of communication devices (). A contact list (), associated with each communication device, identifies one or more of the other communication devices. The network provides one or more multicast addresses based on the contact lists of the communication devices to the plurality of communication devices. The network also sends multicast messages identified by the one or more multicast addresses to the plurality of communication devices. Each multicast address identifies a group of multicast devices among the plurality of communication devices, and the multicast messages include presence information about the group of multicast devices. A portion of the plurality of communication devices receives the multicast messages identified by the one or more multicast addresses and extracts the presence information about the group of multicast devices from the multicast messages.

US Patent:

7023813, Apr 4, 2006

Filed:

Dec 31, 2002

Appl. No.:

10/334635

Inventors:

Donald G. Newberg - Hoffman Estates IL, US
Matthew Keller - Algonquin IL, US
Ross J. Lillie - Hoffman Estates IL, US
James E. Mathis - Barrington IL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04H 1/00

US Classification:

370312, 370270, 370390, 370338, 370432, 709227, 709228

Abstract:

In a communications system having a plurality of endpoints each including a logical entity and its physical counterpart, a method for managing a pool of multicast addresses. The method including the steps of: generating a pool of available multicast addresses; receiving a request for a multicast address; allocating a multicast address for usage subject to at least a first limitation; monitoring the usage of the allocated multicast address; and reclaiming the allocated multicast address if as a function of the monitoring it is detected that a first condition is met, and causing the allocated multicast address to be placed into the pool of available multicast addresses.

US Patent:

7103011, Sep 5, 2006

Filed:

Oct 11, 2001

Appl. No.:

09/975353

Inventors:

Surender Kumar - Naperville IL, US
Mark Shaughnessy - Phoenix AZ, US
James E. Mathis - Barrington IL, US
Gregory A. Dertz - Algonquin IL, US
Michael D. Sasuta - Mundelein IL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04L 12/16
H04L 12/66

US Classification:

370261, 370352

Abstract:

A wireless communication system comprises a connectionless packet network coupled to a plurality of sites. Upon a first communication unit () initiating a call request for a 2-party call with a second communication unit (), a call server identifies respective multicast IP addresses (MC, MC) associated with the source and target. If the first communication unit , or its associated site () desires to send payload to the second communication unit , it addresses the payload to the multicast IP address (MC) of the second communication unit, and the second communication unit , or its associated site joins the multicast address MC to receive the payload. Conversely, if the second communication unit , or its associated site () desires to send payload to the first communication unit , it addresses the payload to the multicast IP address (MC) of the first communication unit, and the first communication unit , or its associated site joins the multicast address MC to receive the payload.

US Patent:

7353038, Apr 1, 2008

Filed:

Mar 29, 2005

Appl. No.:

11/092236

Inventors:

James E. Mathis - Barrington IL, US

Assignee:

Mototola, Inc. - Schaumburg IL

International Classification:

H04B 7/00

US Classification:

455518, 4554141, 455517, 455519, 455520

Abstract:

A method and apparatus for indicating an expected level of quality in a private Push To Talk (PTT) network are disclosed. The method and apparatus receive at least one of an affiliation message and a talkgroup call request for a first subscriber unit of the private PTT network wherein a talkgroup is associated with at least one of the private PTT network, another PTT network, and a public network. The method and system determine an expected level of quality for the talkgroup and send the determined expected level of quality to the subscriber unit.

US Patent:

7366780, Apr 29, 2008

Filed:

Dec 31, 2002

Appl. No.:

10/334577

Inventors:

Matthew Keller - Algonquin IL, US
Ross J. Lillie - Hoffman Estates IL, US
James E. Mathis - Barrington IL, US
Donald G. Newberg - Hoffman Estates IL, US

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G06F 15/16
H04L 12/16
H04M 11/00
H04M 3/42

US Classification:

709227, 709204, 370260, 370261, 370263, 370270, 370351, 379 9321, 379 9331, 37910006, 37920501, 37920601

Abstract:

In a communications system having a plurality of endpoints () each including a logical entity and its physical counterpart, a system for controlling and managing session between at least two endpoints. The system including a registration manager (), an application layer router (), a session controller (), a group database manager (), and at least one group entity ().