Patents by Inventor Jitang Sun

Jitang Sun has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and system for playing ring back tone, home location register and mobile switching center
    Patent number: 8254871
    Abstract: A ring back tone playing method and system, a home location register and a mobile switching center, the method comprises the calling side mobile switching center transmitting a route request message to the called side home location register when the calling side mobile switching center has received the call request transmitted from the calling terminal to the called terminal; the calling side mobile switching center receiving the ring back tone service identifier returned from the called side home location register which instructs that the called side home location register has got the called terminal's absence response message and the called terminal has customized a ring back tone service; the calling side mobile switching center instructing the playing device to play the ring back tone to the calling terminal according to the ring back tone service identifier.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: August 28, 2012
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Ping Wang, Jitang Sun
  • METHOD AND SYSTEM FOR PLAYING RING BACK TONE, HOME LOCATION REGISTER AND MOBILE SWITCHING CENTER
    Publication number: 20100022219
    Abstract: A ring back tone playing method and system, a home location register and a mobile switching center, the method comprises the calling side mobile switching center transmitting a route request message to the called side home location register when the calling side mobile switching center has received the call request transmitted from the calling terminal to the called terminal; the calling side mobile switching center receiving the ring back tone service identifier returned from the called side home location register which instructs that the called side home location register has got the called terminal's absence response message and the called terminal has customized a ring back tone service; the calling side mobile switching center instructing the playing device to play the ring back tone to the calling terminal according to the ring back tone service identifier.
    Type: Application
    Filed: September 22, 2009
    Publication date: January 28, 2010
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Ping Wang, Jitang Sun