Sk Telecom Company, Ltd.

Sk Telecom Ltd.

Hee Hyeok Hahm

Sang Yun Lee

Ki Mun Kim

Yeong Tae No

Jae Young Ju

Jae Young Park

Young Ho Joo

Young Ahn Ryu

Tae Wook Park

Yeong Tee No

The present invention relates to method and apparatus for providing an arbitrary sound chosen by a called subscriber instead of ringback tone to a calling subscriber. In this present invention, if a call is received, a terminating exchanger requests a trunk connection to a sound db server based on the first information on whether or not to replace a ringback tone and the second information on a route to the sound db server that are received from a home location register (HLR), and provides a called subscriber identification for the sound server. Then, the sound db server searches its db for a sound specified by the called, and provides the found sound for the caller instead of a conventional ringback tone via the terminating exchanger connected through a trunk. Through this sequential procedure of network elements, a caller can hear a sound specified by a called instead of a dry ringback tone.

Method and apparatus for providing subscriber-based ringback tone

The present invention presents a method for providing the location information of a mobile station(MS) by selectively using a DBM-based method and a TCP/IP-based method on a global positioning system(GPS) in a mobile telecommunication network constituted of a client server, a mobile positioning center(MPC), a home location register(HLR), and a position determination Entity(PDE). By selectively using a DBM-based method or a TCP/IP-based method according to the type of requested service, the present invention enables to reduce the time required for obtaining the accurate location. Moreover, it can provide the requested location based service(LBS) on an MS even when the MS is on-line or on stand-by mode.

Method for providing the location information on a mobile station based on DBM and TCP/IP

The present invention relates to method for providing an arbitrary sound chosen by a called subscriber instead of an ordinary tone to a calling or call-waiting subscriber. In this present invention, if a call is received, a terminating exchanger requests a trunk connection to a sound db server based on the first information on whether or not to replace an ordinary tone and the second information on a route to the sound db server that were received from a home location register (HLR) when a called was registered, and provides the called identification and call state (idle/busy or call-waiting, etc.) for the sound server. Then, the sound db server searches its db for a sound associated with the call state specified by the called, and provides the found sound for the caller instead of a conventional tone via the terminating exchanger. Through this sequential procedure of network elements, a caller can hear a sound specified by a called instead of a dry ordinary tone.

Method for providing a tone replacing sound chosen by a subscriber in call waiting service

In a method for providing an arbitrary sound, chosen by a called subscriber, as a ringback tone to a calling subscriber through a call-originating exchanger, the call-originating exchanger requests a trunk connection to a sound database server based on first information on whether or not to replace an RBT (RingBack Tone) and second information on a route to the sound database server that are received from a home location register (HLR), and provides a called subscriber identification for the sound database server. Then, the sound database server searches its database for a sound specified by the called, and provides the found sound for the caller instead of a conventional RBT via the originating exchanger connected through the requested trunk connection. The caller can hear a sound specified by the called instead of the conventional RBT.

Method for providing subscriber-based ringback tone through a call-orginating exchanger

The present invention relates to apparatus and method of providing a history of failed calls for a subscriber who is targeted by the failed calls. In the present invention, when an exchanger can not route a call to a target subscriber it notifies an HLR (Home Location Register) of call routing failure. Then, the HLR sends information about the failed call, which includes the called and the calling number, and call originating time (or call receiving time), to a call control system. The call control system adds the received failed-call information to a calling history for the called number. Afterwards, when the called number is accessible the call control system provides a subscriber of the called number with the calling history, whereby the subscriber can know all of calling numbers that requested to make connections with him or her while he or she was not able to communicate with a mobile network.

Apparatus and method of providing a history of calling numbers

In a method of providing a caller with a pre-stored sound chosen by a called subscriber instead of a standard RBT (RingBack Tone), an HLR (Home Location Register), when a location request message is received from a call-originating exchanger, furnishes either the call-originating exchanger or a call-terminating exchanger with information on whether or not an RBT is to be replaced for the called terminal. The call-originating exchanger or the call-terminating exchanger then searches, while a trunk connection is established between the exchangers, for a sound code assigned to the called terminal based on the information furnished by the HLR, and provides the caller with a pre-stored RBT-replacing sound associated with the found sound code as an RBT.

Method for providing a subscriber-based ringback tone sound stored in a mobile exchanger

The present invention discloses a method for tracking location of synchronous and asynchronous mobile communication network subscribers by using a dual stack home location register and a dual stack mobile positioning center. When the dual stack mobile positioning center externally receives a location tracking request for a subscriber, it requests reception subscriber information to the dual stack home location register, confirms whether the terminal is located in a synchronous or asynchronous mobile communication network by referring to the reception subscriber information from the dual stack home location register and network information, and requests location tracking for the terminal to the corresponding mobile communication network. Accordingly, location of the synchronous and asynchronous mobile communication network subscribers can be tracked in the network in which mobile communication networks using different protocols coexist.

Method for tracking location of subscribers in dual stack mobile communication network

The present invention discloses a mobile location based service system and method. The mobile location based service system includes an application server for receiving a location based service request, and providing a location based service of a mobile station, and a location information providing system for discriminating location of the mobile station according to a kind of a location information service, and transmitting the location of the mobile station to the application server. A cell or GPS based location based service can be selectively provided according to a function of a mobile station of a mobile communication subscriber and a service request type. The GPS based location based service can be provided by an SMS delivery point to point message through an N07 signal network, and thus embodied during a voice call of the mobile station.

Mobile location based service system and method

The present invention relates to a method for providing an arbitrary sound chosen by a called subscriber for a caller instead of a conventional RBT (RingBack Tone). The present method comprises: the first step, conducted by an HLR (Home Location Register), of furnishing a call-originating exchanger with information on whether to replace RBT or not for a terminal if a location request message is received from the call-originating exchanger when a call connection is requested to the terminal; the second step, conducted by the call-originating exchanger, of requesting a trunk connection to a call-terminating exchanger, and further requesting another trunk connection to a sound providing means based on the information and preset routing information while furnishing the sound providing means with information to identify the terminal; and the third step, conducted by the sound providing means, of selecting a sound based on the terminal identifying information, and providing the selected sound for a caller instead of an RBT.

Method for providing a subscriber-based ringback tone sound

The present invention provides a caller with an arbitrary sound chosen by a called subscriber instead of a conventional RBT (RingBack Tone) without fails even in a flexible paging mode. In the present method: both exchangers check individually whether first information on replacing RBT or not and second information informing a route to a sound providing means have been stored for a called terminal, when an originating exchanger requests a trunk connection to said both exchangers according to a flexible paging procedure, and receive the first and the second information from a home location register after requesting if said information has not been stored, and request individually a trunk connection to the sound providing means while furnishing information identifying the called, based on the already-stored or the received first and the second information; and the originating exchanger selects one of the two paths connected to said both exchangers, and delivers to a caller an RBT replacing sound determined by the sound providing means that is received through the selected path.

Method for providing subscriber-based ringback tone in flexible paging mode

The present invention relates to method for providing a calling subscriber with an arbitrary sound chosen by a called subscriber instead of a common ringback tone (RBT) with no progress tone. In this present invention, if a call is generated, a terminating exchanger starts paging of the called and simultaneously requests a trunk connection to a sound db server without waiting acknowledgement of the paging from the called based on the first information on whether or not to replace an RBT and the second information on a route to the sound db server that have been received from a home location register (HLR), and provides a called subscriber identification for the sound db server. Then, the sound db server searches its db for a sound specified by the called, and provides the found sound for the caller instead of a conventional RBT via the terminating exchanger connected through a trunk. Through this sequential procedure of network elements, a caller can hear a sound specified by a called instead of a dry RBT with no progress tone.

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Seoul, South Korea

Hee Hyeok Hahm