Patents Examined by Thuan Nguyen
  • Patent number: 6075981
    Abstract: A method for responding to a pointer received on an analog control channel pointing to a control channel belonging to a forbidden service provider includes avoiding a power-up scan and resuming camping on the analog control channel. A wireless communications mobile unit is camped on an analog control channel may receive a channel pointer to a digital control channel. If the digital control channel has acceptable received signal strength, the service provider information for that control channel is checked. If the control channel belongs to a non-forbidden service provider, the mobile unit camps on the digital control channel. If the control channel belongs to a forbidden service provider, the mobile unit returns to camping on the analog control channel without performing an intervening power-up scan. By avoiding power-up scans when the pointed-to channel belongs to a forbidden service provider, less power is consumed and users receive more consistent communications service.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: June 13, 2000
    Assignee: Ericsson, Inc.
    Inventors: Amish K. Shah, Nadi S. Findikli, David Hoover
  • Patent number: 6070053
    Abstract: In a radio communication system and radio communication apparatus, the ringing sound or melody of calling notification can be altered by users. A music data receiving section, a music data storage section and a music data reproducing section are provided within a controller. A calling party transmits a calling signal in which music data is appended to the message; a called party receives the calling signal through an antenna and radio section, where a music data receiving section is used to determine whether or not music data is contained in the received message in the calling signal, and, if it is contained, to perform ringing for calling notification with a speaker by using the music data.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: May 30, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Tomohisa Yamashita
  • Patent number: 5995845
    Abstract: The transmission system is designed for links between an infrastructure and moving bodies (10.sub.1, 10.sub.2) constrained to move along a determined path. The infrastructure has fixed transmitter/receiver stations distributed along the path, each having two transmitter/receivers allocated to two adjacent cells, e.g. (E'.sub.1, E.sub.2). The transmitters of two successive fixed stations allocated to the same cell are synchronized and they transmit using a coding system that is capable of tolerating or taking advantage of propagation over multiple paths.
    Type: Grant
    Filed: October 22, 1997
    Date of Patent: November 30, 1999
    Assignee: Matra Transport International
    Inventor: Regis Lardennois
  • Patent number: 5909647
    Abstract: When a call is received at the TAD from telephone 1 via exchange A2 and exchange B3, the TAD transmits an outgoing message. In response to the aforementioned message, the caller transmits a message or telephone number data regarding his own telephone. After the TAD records the telephone number, it calls up portable telephone 6 by autodialing. When TAD and portable telephone 6 are in a connected condition via base station 5, and if TAD sends the telephone number data in a predetermined format, it will be displayed upon the display unit of portable telephone 6.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: June 1, 1999
    Inventors: Kazuo Hashimoto, deceased, by Takako Hashimoto, legal representative
  • Patent number: 5884174
    Abstract: Improved wireless telephone call admission methods for admitting new and/or handoff calls into a wireless telephone network having a plurality of communications channels. One such method, fractional guard channel call admission, effectively reserves a non-integral number of guard channels for handoff calls by rejecting new calls in accordance with a probability value that is dependent upon the current channel occupancy. Fractional guard channel call admission results in a significant reduction of new call blocking when a fixed constraint is placed on the handoff call blocking probability. Fractional guard channel call admission also provides improvements over the integral guard channel policy by minimizing the number of required channels when fixed constraints are placed on both the new call blocking probability and the handoff call blocking probability.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: March 16, 1999
    Assignee: Lucent Technologies Inc.
    Inventors: Ramesh Nagarajan, Ramachandran Ramjee, Donald Fred Towsley
  • Patent number: 5870667
    Abstract: A support system architecture for use in a communications network environment enabling automatic provisioning, change in service, and maintenance at a plurality of subscriber locations. A gateway allows communication between a plurality of programmer providers and a network provider including status information for each of the plurality of subscriber locations. A customer management system in communication with the gateway determines whether service at a subscriber location can be remotely provisioned or changed based on the status information. A service control manager in communication with the customer management system automatically provisions or performs a change in the service of the subscriber location if the service of the subscriber location can be remotely provisioned or changed.
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: February 9, 1999
    Assignees: MediaOne Group, Inc., U S West, Inc.
    Inventor: Mark J. Globuschutz
  • Patent number: 5852777
    Abstract: A method and apparatus for screening a call in a telecommunications network having a first system comprising a first subscriber station and a second system comprising a second subscriber station, associated with the first subscriber station by a predetermined relationship. Each subscriber station in the first system has a unique subscriber number and the second system having a general number for all subscriber stations. In the method and apparatus, call setup requests for calls to the general number of the second system are screened to determine if the call was originally made to the number of the first subscriber station and then forwarded to the general number of the second system, or if the call was originally made to the general number. If the call was originally made to the first subscriber station, only the second subscriber station is alerted. If the call was originally made to the general number, all the subscriber stations in the second system are alerted.
    Type: Grant
    Filed: June 11, 1996
    Date of Patent: December 22, 1998
    Assignee: Nokia Mobile Phones Limited
    Inventor: Peter Harrison
  • Patent number: 5790955
    Abstract: In a mobile communication system, a mobile communication switching center includes a communication restriction control section for calculating a communication channel usage from the traffic volume of communication channels, comparing the usage with first and second thresholds, and designating communication restriction on the basis of the comparison result, and a base station control section for creating first notification information indicating communication restriction on only the roaming mobile station or second notification information indicating communication restriction on all the mobile stations on the basis of an instruction from the communication restriction control section depending on whether it is determined that the calculated communication channel usage is higher than the first threshold but is not higher than the second threshold, or exceeds the second threshold, and transmitting control information including the pieces of first and second notification information to each of the mobile stations
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: August 4, 1998
    Assignee: NEC Corporation
    Inventor: Hiroyuki Tomoike