Nortel Networks Corporation

Blackberry Corporation

William Edward Illidge

Chandra Sekhar Bontu

Devaki Chandramouli

Prabaharan Kanesalingam

Jagdish Venkata Sonti

Azeem Ahmad

Henry S Lee

Jianping Jiang

Baji Edupuganty

Stephen P Leung

Jerri L Turner-Harris

Warren Richard Morris

Stephan Daniel Stephanson

To perform a handover of a mobile station from a source base station to a target base station, the source base station determines a delay of a connection between the source base station and the target base station. The source base station computes an action time taking into account the determined delay, the action time specifying a time when the target base station is able to allocate resources to the mobile station for the handover.

Computing an action time for allocation of resources to a mobile station that is handing over from a source to a target base station

A method and system to facilitate an inter-system CDMA multi-mode multi-pilot hard handoff is,provided. Reference target cell information consisting of reference target cell designations and their attributes are passed between the BS and MSC interfaces and between the serving MSC and target MSC interfaces. This invention enhances the ANSI-41 and CDG IOS A-Interface specifications to include reference target cell information. The target MSC processes the handoff request using the reference target cell information. The target MSC uses the reference target cell information to perform the handoff and other functions such as handoff retries, load balancing, and target screening. This increases the reliability of inter-system CDMA multi-mode multi-pilot hard handoffs.

Methods and systems for facilitating a multi-mode multi-pilot hard handoff

A method of reducing paging channel usage in a CDMA communication system. Each mobile switching centre maintains in its visitor location registry information regarding a paging channel or carrier frequency that each mobile station registered is monitoring. Then, when it comes time to send a page to a mobile station, the mobile switching centre looks up the information and appends it to the page which is sent to all basestation transceivers. The basestation transceivers extract the information and identify the paging channel the mobile station to which the page is addressed is monitoring. The transceivers then broadcast the page message over their air interfaces on the identified paging channel.

CDMA multiple carrier paging channel optimization

Disclosed is an apparatus and method whereby a direct base station to base station communication link is used to bypass message transmissions to an MSC in establishing a soft handoff. By using a standardized protocol for both traffic and signaling messages flowing directly from base station to base station, communications with foreign manufacturers base station equipment may be readily accomplished.

Methods and systems for standardizing interbase station communications

A method for allowing subscribers of a telecommunications network to change easily between sets of desired features is disclosed. The home location register stores multiple profiles of all subscribers within its serving region along with an active profile number field indicating the list of features currently available to each subscriber. Upon initial registration of the mobile station at a mobile switching center communicating with the home location register, a default profile is extracted from the home location register. Upon dialling a special code or number, a subscriber can prompt a change of profile containing a different set of features for different users of the mobile station or for different times of day or geographic areas. In this way, subscribers bypass the routine of having to contact an agent in order to add or remove features and are allowed to switch among multiple profiles at will. A personal identification number can be used to enhance the security of the profile change procedure.

Multi-profile subscriber

A system and method for delivering short messages to idle mobile stations which conserves paging channel capacity. A normal page is first sent to all cells to locate the mobile station to which the short message is addressed. When the mobile station is located, the full short message is sent over the paging channel for the single cell in which the mobile station is located if the length of the short message is determined to be suitable for sending over the paging channel. If the short message is too long, then a traffic channel is established to the mobile station, and the message is sent over the traffic channel.

Growing community of inventors

Kanata, Canada

William Edward Illidge