Hee Ran Lee

6353902, Mar 5, 2002

Jun 8, 1999

09/337209

Anurudha Kulatunge - Richardson TX
Kalyan Basu - Plano TX
Hee C. Lee - Plano TX
Meenakshi Prakash - Plano TX

Nortel Networks Limited - St. Laurent

G06F 1100

714712, 714 47, 714 48

A system for proactive maintenance of a telecommunications network. A database is created containing characteristics of a plurality of valid logs. These valid logs represent alarms within a network which report status and abnormalities in the network and which have been specifically selected by a network domain expert or administrator from a larger group of logs. The characteristics correspond to a pattern of network fault parameters. The network is monitored for occurrences of a valid log. When a valid log is encountered, future occurrence of a fault is predicted based on an analysis of the valid log and the characteristics found in the database. Corrective measures are taken to prevent the fault from occurring.

6535742, Mar 18, 2003

Jun 29, 1999

09/342397

Hua Jiang - Plano TX
Chang Yu - Plano TX
Ping Yang - Plano TX
Hee Lee - Plano TX

Nortel Networks Limited - St. Laurent

H04Q 720

455452, 455 62, 455 63, 455444

The present invention is directed to a method and apparatus for assigning channels in a cellular environment. A time period T is defined in which cellular operational measurement information such as traffic information and mobility information are collected. Channels that are available for allocation are collected and maintained in a matrix. The predicted number of channels are calculated based on the operational measurement information. Using the channels available for allocation and the predicted number of channels, channels are allocated for use. As the operational measurement information changes the time period T is adjusted to accommodate the changes in traffic or mobility within the cellular system.

6741853, May 25, 2004

Nov 9, 2000

09/711223

Hua Jiang - Plano TX
Hee C. Lee - Plano TX
Kalyan K. Basu - Plano TX
Chang Yu - Plano TX

Nortel Networks Limited - St. Laurent

H04M 3493

455418, 4554141, 455 412, 455445, 709223, 709230, 709219

A method for providing information to devices in a format preferable to a device type. This is achieved by receiving an information request, detecting the device type from which the information request originated, adapting the content for presentation on the device type, and presenting the information to the device. By the use of this invention, telecommunications users are presented information in a format suitable to the device being used.

6751459, Jun 15, 2004

Apr 20, 1999

09/295030

Hee C. Lee - Plano TX
Kalyan K. Basu - Plano TX
Fred Homayoun - Plano TX

Nortel Networks Limited - St. Laurent

H04Q 720

455445, 4554321

A method and apparatus for updating information in a personal mobility database server with information concerning a users nomadicity. When the user travels from one place to another, the user registers with PMDNS server at an IP port for computing communications. PMDNS takes users terminal personalization, together with usage profile, session characteristics into account to map a partys identifier to a terminals identifier. The IP address of the users current location is used in concert with the terminals identifier, which is itself an IP address, to route incoming computing communications connection requests to the current location of the user. This information will be returned by the PMDNS directory server to the access network for the setup of the communications.

7136631, Nov 14, 2006

Nov 9, 2000

09/711056

Hua Jiang - Plano TX, US
Hee C. Lee - Plano TX, US

Nortel Networks Limited - St Laurent

H04M 3/42

4554141, 4554142, 4554143, 455406, 4554562, 4554563, 455403, 455408, 455418

A method for providing telecommunications users access to information networks. This is achieved by providing access information for at least one service provider to a service application. Thereafter, the service application retrieves the access information when information is requested from the service provider. The service application formats a request with the access information and transmits the request to the service provider. The service provider's response is presented to the user. By the use of this invention, the user can request information from a service provider from one or more devices without re-entering the access information.

61225223, Sep 19, 2000

Feb 19, 1998

9/026089

Hee C. Lee - Plano TX

Nortel Networks Corporation - Montreal

H04Q 706

455458

A method for reducing the paging load in a cellular communication system is described. The cell C with the largest paging load L is first identified. Since this cell is usually included in more than one paging zone, the paging zones including cell C are identified. Thereafter, cell C is removed tentatively from each identified zone and a ratio R calculated which represents the decrease in loading on cell C due to being removed from zone z divided by the maximum increase in loading on any other cell in the network. The zone for which the ratio R is the largest is the best candidate for removing cell C therefrom. After doing so tentatively, the cell C' with the largest paging load L' thereon is identified. If the loading L is greater than L', cell G is removed permanently from the zone having the highest ratio R therefor and the process is repeated until L' is greater than L at which point the process is stopped without removing cell C from the zone with the highest ratio R. In another operation, cell C, a largest paging load L, and a most favorable zone P from which to remove cell C are first identified.

59078103, May 25, 1999

Nov 6, 1996

8/743689

Sairam Subramanian - Garland TX
Seshu R. Madhavapeddy - Richardson TX
Alexander J. Montoya - Richardson TX
Hee C. Lee - Plano TX
Steven J. Currin - Allen TX
Falguni Sarkar - Dallas TX

Northern Telecom Limited - Montreal

H04Q 706

455458

A method for reducing the paging load in a cellular communication system is described. The cell C with the largest paging load L is first identified. Since this cell is usually included in more than one paging zone, the paging zones including cell C are identified. Thereafter, cell C is removed tentatively from each identified zone and a ratio R calculated which represents the decrease in loading on cell C due to being removed from zone z divided by the maximum increase in loading on any other cell in the network. The zone for which the ratio R is the largest is the best candidate for removing cell C therefrom. After doing so tentatively, the cell C' with the largest paging load L' thereon is identified. If the loading L is greater than L', cell C is removed permanently from the zone having the highest ratio R therefor and the process is repeated until L' is greater than L at which point the process is stopped without removing cell C from the zone with the highest ratio R.

61610089, Dec 12, 2000

Nov 23, 1998

9/198063

Hee C. Lee - Plano TX
Kalyan K. Basu - Plano TX
Shun Hua Zhou - Dallas TX
Wei Yuan - Plano TX
Hua Jiang - Plano TX
Edith Yeh - Plano TX
Surnjani Djoko - Richardson TX

Nortel Networks Limited - Montreal

H04M 342

455414

A personal mobility system determines a terminal address corresponding to a called user based upon a personal identifier of the called user. The personal mobility system operates in conjunction with a plurality of heterogeneous networks to provide the terminal address corresponding to the called user, independent of the particular network within which the called user currently operates. The personal mobility system includes a personal mobility user application and a personal mobility server application. The personal mobility user application receives a request from a calling user, the request including the personal identifier of a called user. The personal mobility server application couples to the personal mobility user application and includes a plurality of user records. Each user record is respective to a user and is indexed by a respective personal identifier. Further, each user record includes a plurality of terminal records with each of the terminal records including a respective terminal address.