David Alexander Irvin

US Patent:

6532374, Mar 11, 2003

Filed:

Jun 16, 2000

Appl. No.:

09/595318

Inventors:

Sandeep Chennakeshu - Cary NC
David Townsend - Chapel Hill NC
David R. Irvin - Raleigh NC
Randy Bright - Pittsboro NC

Assignee:

Ericsson Inc. - Research Triangle Park NC

International Classification:

H04B 106

US Classification:

455569, 455345, 37942004

Abstract:

A radiotelephone includes a base unit mounted within the vehicle having a wide area transceiver for communicating with a station outside the vehicle, a control unit disposed in the vehicle remotely from the base unit, and a local area network for establishing a communication link between the base unit and the control unit. The local area network is adapted to transmit control and data signals between the base unit and the control unit. The control unit includes a keypad for entering commands and data that are transmitted to the base unit via the local area network, and a display for displaying information to the user. The control unit may also include a speaker and microphone. Alternatively, the speaker and microphone may be contained in a remote audio unit that is linked to the base unit via the local area network. The control unit may, for example, be incorporated into the steering wheel of a vehicle while the base unit is concealed in the trunk or under the seat of the vehicle.

US Patent:

6542758, Apr 1, 2003

Filed:

Jul 22, 1999

Appl. No.:

09/359551

Inventors:

Sandeeep Chennakeshu - Cary NC
David Townsend - Chapel Hill NC
David R. Irvin - Raleigh NC
Nils Rydbeck - Cary NC

Assignee:

Ericsson Inc. - Research Triangle Park NC

International Classification:

H04B 138

US Classification:

455569, 455575, 455557

Abstract:

A vehicle mounted communication system comprises a hand held mobile phone and a hands-free unit. The hand-held unit includes a wide area transceiver for station outside of the vehicle and a short-range radio transceiver the hands-free unit includes a microphone and speaker and is mounted in a fixed location in the vehicle. A short range radio link operatively connects the hand-held unit and the hands-free unit to enable voice and data signals to be exchanged between the hand-held unit and the hands-free unit. The hands-free unit may include a programmable memory unit to store a user table containing user identification data and configuration data. The hands-free unit control logic configures the hands-free unit based on the user identification received from the hand-held unit, thus allowing multiple users to have their preferences recognized by an individual hands-free unit. The programmable memory unit and control logic may be incorporated into the vehicles internal network for control of things like electric seats, stereo controls and the like.

US Patent:

6678508, Jan 13, 2004

Filed:

Feb 7, 2000

Appl. No.:

09/499848

Inventors:

Ravinder David Koilpillai - Apex NC
David R. Irvin - Raleigh NC

Assignee:

Ericsson Inc. - Research Triangle Park NC

International Classification:

H04B 1702

US Classification:

455137, 455132, 455133, 455273, 375347

Abstract:

A mobile communications device includes at least two receivers and a memory module. The power consumption of the mobile communications device is controlled by selectively awakening and sleeping the receivers as needed to ensure that the desired quality of reception to check the control channel for messages from an associated base station and to handle incoming communications is maintained. The mobile communications device may operate in single receiver mode or dual receiver diversity mode. In the dual receiver diversity mode, the mobile communications device may switch between one of a number of diversity combining techniques based on the quality of reception.

US Patent:

57455023, Apr 28, 1998

Filed:

Sep 27, 1996

Appl. No.:

8/723217

Inventors:

Ali S. Khayrallah - Apex NC
David R. Irvin - Raleigh NC

Assignee:

Ericsson, Inc. - Research Triangle Park NC

International Classification:

H03M 1300
H04L 102
H04L 108
H04L 118

US Classification:

371 35

Abstract:

A method of error correction for an ARQ system allows decoding when an even number of flawed packets are received. Multiple flawed replications of a transmitted bit sequence are compared bit-by-bit. A set of composite packets is formed containing all possible combinations of values at the disputed bit positions. A validity check is performed on each of the composite packets. If only a single composite packet passes the validity check, an acknowledgment signal is sent.

US Patent:

63243954, Nov 27, 2001

Filed:

Nov 18, 1998

Appl. No.:

9/195315

Inventors:

Ali S. Khayrallah - Apex NC
David R. Irvin - Raleigh NC

Assignee:

Ericsson Inc. - Research Triangle Park NC

International Classification:

H04M 1100
H04Q 720

US Classification:

455406

Abstract:

Charge for communication of a message in a wireless communications system is assigned commensurate with the spectral and non-spectral resource demand associated with the service used to communicate the message. A service may be identified from a plurality of services in response to a user request to communicate a message, for example, and charge for the communication of the message assigned to the user based on the service identified. According to another aspect, the system may first determine whether sufficient system resources are available to communicate the message using the selected service. According to another aspect, the system may first determine whether the user is authorized to communicate the message using the selected service.

US Patent:

61190225, Sep 12, 2000

Filed:

Mar 18, 1997

Appl. No.:

8/819787

Inventors:

William Richard Osborn - Cary NC
David Rand Irvin - Raleigh NC

Assignee:

Ericsson Inc. - Research Triangle Park NC

International Classification:

H04B 138

US Classification:

455567

Abstract:

An incoming call alert system for use with a portable communication device is disclosed as including an accessory unit physically separate from the portable communication device for providing an alerting signal, a wireless link between the portable communication device and the accessory unit, and circuitry electrically connected to operating circuitry of the portable communication device for providing a message exclusively to the accessory unit over the wireless link when an incoming call is received by the portable communication device, the message causing the accessory unit to activate the alerting signal. The circuitry further includes an interface for maintaining and terminating the electrical connection between the circuitry and the operating circuitry of the portable communication device, a transceiver for transmitting messages exclusively to and receiving messages exclusively from the accessory unit over the wireless link, and control logic for monitoring receipt of an incoming call by the portable communication device and activating the transceiver to transmit the message in response thereto. The accessory unit further includes a power source, a transceiver for receiving messages exclusively from and transmitting messages exclusively to the circuitry over the wireless link, a transducer which provides the alerting signal upon activation, and control circuitry for activating the transducer upon receipt of the message by the receiver via the wireless link.

US Patent:

6115394, Sep 5, 2000

Filed:

Mar 4, 1998

Appl. No.:

9/034424

Inventors:

Kumar Balachandran - Cary NC
Havish Koorapaty - Raleigh NC
David R. Irvin - Raleigh NC

Assignee:

Ericsson Inc. - Research Triangle Park NC

International Classification:

H04B 166

US Classification:

370477

Abstract:

Methods, systems and computer program products are provide which reduce overhead in the communication of messages having a message header over a communication link. An alias address is selected from a predefined set of alias addresses and associated with a portion of the header of the message. If no unused alias addresses are available the least recently used alias address is associated with the portion of the message header. The portion of the message header is removed from the message and the alias address substituted. This reduced data message is then transmitted. The number of alias addresses may be increased to avoid churning of alias addresses. The message is reconstructed based on the alias address and the associated portion of the original message.

US Patent:

60351780, Mar 7, 2000

Filed:

May 9, 1996

Appl. No.:

8/647188

Inventors:

Sandeep Chennakeshu - Cary NC
Nils Rydbeck - Cary NC
Amer Hassan - Cary NC
Stanley L. Reinhold - Cary NC
David R. Irvin - Raleigh NC

Assignee:

Ericsson Inc. - Research Triangle Park NC

International Classification:

H04B 7185

US Classification:

455 121

Abstract:

A communication system provides efficient satellite communication in rural, remote, or sparsely populated areas, or in areas lacking a conventional telephone infrastructure, or in special purpose uses such as airport coverage. Subscribers in such areas communicate with the satellite via a simple, highly modular entry node located in a local area to be served. Subscriber units provide subscribers with access to the system. The subscriber units are connected to the entry node via local access loops provided by point-to-point wireless links between the subscriber units and the entry node. The entry node internally switches local traffic among subscribers and connects traffic to outside circuits, via wireless links with the satellite, as appropriate. The outside circuits are provided by the cooperative working of the satellite, an entry-node controller, and an earth station. The wireless links between the satellite and the entry node and the local access loops may operate at the same or different frequencies.