Lee W Davidson

6377799, Apr 23, 2002

Jun 17, 1999

09/335806

Heino Hameleers - Kerkrade, NL
Lee Davidson - McKinney TX
Tore Martin Hagen - Borgen, NO

Ericason Inc. - Plano TX

H04J 312

455426, 370466, 370913

An Internet Protocol (IP)-based radio telecommunications network and method of providing data services to a mobile terminal. An Internet Protocol Shared Interworking Function (IP-SIWF) is implemented in the network, and is controlled from a Mobile Switching Center (MSC) utilizing the Media Gateway Control Protocol (MGCP) device control protocol. When a data call carrying a data payload is originated by a mobile terminal, the data call is transported utilizing radio access and radio link protocols to the IP-SIWF. The radio access and radio link protocols are terminated in the IP-SIWF, and the data payload is transported thereafter utilizing a real time protocol over a User Datagram Protocol (UDP) and an IP protocol layer.

6408182, Jun 18, 2002

Jul 16, 1999

09/356107

Lee Davidson - McKinney TX
Eric Valentine - Plano TX
Heino Hameleers - Kerkrade, NL

Ericsson, Inc. - Richardson TX

H04Q 723

455433, 455424, 455 9, 455 8, 455 671, 455560, 455507

A telecommunications network architecture and method of providing failover operations between mobile switching centers (MSCs). A plurality of MSCs and at least one base station controller (BSC) are connected to an Internet Protocol (IP) network in which transmission paths and control paths are logically separated. The BSC reports to a primary MSC and includes an alternative MSC list identifying at least one backup MSC for the primary MSC. The BSC determines when the primary MSC has failed, and utilizes a control path in the IP network to notify the backup MSC that the BSC has switched its reporting to the backup MSC. The BSC also utilizes a transmission path in the IP network to send mobile station communications from the BSC to the backup MSC. Mobile station location updating requests are sent from the backup MSC to a home location register (HLR). The requests include a new element that informs the HLR that the backup MSC is now serving the mobile station due to a failure of the primary MSC.

6449478, Sep 10, 2002

May 6, 1999

09/306562

Eric Valentine - Plano TX
Lee Davidson - McKinney TX

Ericsson Inc. - Research Triangle Park NC

H04Q 720

455430, 455427, 455428

A telecommunications system and method is disclosed for providing a more accurate measurement of the cumulative path delay present in a call to enable switches to make an informed decision as to the routing method to use. In one embodiment, the Integrated Services Digital Network User Part (ISUP) satellite hop counter field is expanded to include three fields, one for each type of delay: geostationary satellite hops, mid-earth orbit satellite hops and low-earth orbit satellite hops. In an alternative embodiment, a cumulative delay value in milliseconds or centiseconds, instead of the number of satellite hops, can be included in the expanded ISUP satellite hop counter field.

6483820, Nov 19, 2002

Mar 22, 1999

09/274440

Lee Davidson - McKinney TX
Heino Hameleers - Kerkrade, NL
Frank Hundscheidt - Kerkrade, NL

Ericsson Inc. - Research Triangle Park NC

H04Q 720

370329, 370429, 370468, 455452

A system and method for providing dynamic demand based management of traffic channel allocation in a mobile communications network providing high-speed circuit-switched data services. Traffic channel allocation for the data services is controlled dynamically by an InterWorking Function (IWF) which monitors the status of the associated buffers. The need for additional radio resources and the under-utilization of current radio resources is automatically detected by the IWF which respectively responds by initiating new traffic channel assignments via the Mobile Services switching Center or requesting the Mobile Services switching center deallocate an appropriate portion of the allocated radio spectrum.

6487209, Nov 26, 2002

Mar 16, 1999

09/268476

Eric Valentine - Plano TX
Lee Davidson - McKinney TX
Heino Hameleers - Kerkrade, NL

Ericsson Inc. - Plano TX

H04M 1100

370401, 370466, 370467

The present invention provides a system and method for reliably transferring Dual Tone Multiple Frequency (DTMF) signals originating at a MS through an IP based GSM network. In general, when a MS sends a DTMF request, it is processed in the IP network by a logical application module in a MSC, which, based on the disclosed processing, activates another logical application module in an appropriate gateway (for independent, remote, tone generation), and then the logical application module in the gateway directs the production of the DTMF signal towards the interworking or destination network.

6577862, Jun 10, 2003

Dec 23, 1999

09/471880

Lee Davidson - McKinney TX
Eric Valentine - Plano TX
Heino Hameleers - Kerdrade, NL
Frank Hundscheidt - Kerkrade, NL

Ericsson Inc. - Plano TX

H04Q 700

455422, 455 63, 370433, 370528

Provided is a system, method, and computer program for transmitting, across a mobile communication network, the occurrence of silence in a communication channel. The system generally comprises a first Media Gateway (MGW), which could be a transmission control node (first TCN), for executing a silence transmission algorithm, and a second MGW, such as a second transmission control node (second TCN), for executing a comfort noise generating algorithm. One method detects silence in a communications channel and then transmits a network silence indicator (SID). Another method receives the network SID and then produces a comfort noise. The computer program utilizes a query module for detecting a comfort noise production module in a destination MGW, and a network SID transmission module to send a network SID across a PLMN.

6691164, Feb 10, 2004

Apr 13, 2000

09/548321

Frank Hundscheidt - Kerkrade, NL
Heino Hameleers - Kerkrade, NL
Eric Valentine - Plano TX
Lee Davidson - McKinney TX

Ericsson Inc. - Plano TX

G06F 15173

709225, 709226

A versatile network architecture ( ) utilizing functional distribution of location registers to provide subscriber roaming without requiring local profile copies is disclosed; comprising a core network ( ) having a mobility server ( ) communicatively interfaced ( ) with one or more external networks ( ) and a profile server ( ) storing subscriber records and communicatively interfaced ( ) with one or more external networks ( ), an access network ( ) having a plurality of access service infrastructures ( ) communicatively interfaced ( ) with the mobility server and each providing communication access within a particular area, and one or more subscriber units ( ) communicatively interfaced ( ) with the profile server and operating within one of the particular areas.

6735184, May 11, 2004

Mar 21, 2000

09/531916

Lee Davidson - McKinney TX
Eric Valentine - Plano TX
David Boltz - Garland TX

Ericsson Inc - Plano TX

H04B 7185

370316, 370352, 370401

A system and method for a terrestrial IP network for efficient transmissions within a satellite-terrestrial network. The terrestrial network of a satellite-terrestrial telecommunications system provides for IP signaling between satellite access nodes without the use of dedicated, circuit switched trunks therebetween. The terrestrial network configuration provides for mobile services switching center redundancy and load sharing, as well as direct packet routing between satellite access nodes. Alternatively, a signaling gateway may be interposed on dedicated satellite access node links for converting inter-satellite access node traffic into an IP signaling format for efficient utilization of the direct links.