摘要:
A system is disclosed for providing a bell to a call-terminating terminal that includes a call-originating terminal for generating at least one group, setting group list information which includes additional services usable by the generated group and predetermined terminals belonging to the generated group, registering the set group list information, and transmitting a call request to a terminal belonging to the group; a first server for receiving the call request from the call-originating at a midway point of a route of the call request, acquiring the group list information registered by the call-originating terminal, constructing an additional service menu in accordance with the acquired group list information, and providing the constructed additional service menu through a bell; and the call-terminating terminal for receiving information of the additional service menu constructed by the first server, and constructing an additional service menu usable by the call-originating terminal based on the information.
摘要:
A method and system for providing a phone directory service to a user terminal in a mobile communication network are provided. The method includes receiving a search request including a search keyword for the phone directory service and a subscriber identifier for the user terminal from the user terminal, acquiring subscriber information of a subscriber possessing the user terminal from the mobile communication network in which the user terminal is registered using the subscriber identifier, acquiring a business list of businesses corresponding to the search keyword from a business DataBase (DB) for managing businesses which have subscribed to the phone directory service, arranging the business list based on a communication pattern of a group of similar subscribers which have been determined to have subscriber information similar to that of the subscriber possessing the user terminal according to a predetermined criteria, and providing the arranged business list to the user terminal.
摘要:
A system and method for providing an Internet Protocol (IP)-based service in a communication system are provided. In an IP Multimedia Subsystem (IMS) communication system, a menu server generates a service object based on service capability information of a subscriber received from a service provider, and a terminal activates the service object received from the menu server so that the subscriber can easily use services. The user can select one of services from a service menu displayed on the terminal and immediately implement the selected service.
摘要:
A system is disclosed for providing a bell to a call-terminating terminal that includes a call-originating terminal for generating at least one group, setting group list information which includes additional services usable by the generated group and predetermined terminals belonging to the generated group, registering the set group list information, and transmitting a call request to a terminal belonging to the group; a first server for receiving the call request from the call-originating at a midway point of a route of the call request, acquiring the group list information registered by the call-originating terminal, constructing an additional service menu in accordance with the acquired group list information, and providing the constructed additional service menu through a bell; and the call-terminating terminal for receiving information of the additional service menu constructed by the first server, and constructing an additional service menu usable by the call-originating terminal based on the information.
摘要:
A method and system for providing service menu information when an alerting service is provided between a calling terminal and a called terminal are provided. For this includes transmitting, by a calling terminal, a call setup request message including a service menu request; comparing, by a first server, service capability information of the calling terminal with service capability information of a called terminal, when it is necessary to evaluate the service capability information of the calling and called terminals, upon receipt of the call setup request message; and providing, by the first server, service menu to the calling and called terminals according to the comparison.
摘要:
The invention provides a method and apparatus for transmitting signalling information to a receiver using a plurality of transmission antennas in a time switching configuration. The apparatus includes a controller for generating a switch controlling signal in a non-overlapped time cycle for selecting one of the plurality of transmission antennas to output a transmission signal in a fixed, non-overlapped time interval. The invention further provides for a receiving device for detecting a pilot channel signal from an input forward link signal and generating estimated phase and time values for detecting a traffic channel signal at the selected estimated time position and correcting a phase error of the detected traffic channel signal based on the estimated phase value, for signal decoding.
摘要:
Disclosed is a hard handover method and system for use in a Broadband Wireless Access (BWA) communication system. The method and system includes dividing a data transmission field for mobile stations (MSs) into a handover field and a normal user field, allocating at least one subchannel in the normal user field to non-handover MSs located in a non-handover region, allocating at least one subchannel in the handover field to handover MSs located in a handover region, and performing communication through the allocated at least one subchannel.
摘要:
A demodulation method in a mobile station having a plurality of channels, for receiving a signal from a base station. In one aspect, the base station has a plurality of channels, a BPSK spreader for orthogonally spreading symbol data of each channel with an assigned orthogonal code, and a QPSK spreader for PN-spreading the orthogonally spread signal with a PN code. In the demodulation method, a first QPSK despreader in the mobile station receives PN-spread signal and PN-despreads the PN-spread signal with the PN code, and a second QPSK despreader orthogonally despreads the PN-despread signal with a complex orthogonal code having the real and imaginary parts of the assigned orthogonal code. In another aspect, the base station has a plurality of channels, a QPSK spreader for spreading symbol data of each channel by the real and imaginary parts of its assigned orthogonal code, and a QPSK spreader for PN-spreading the orthogonally spread signal with a PN code. In the demodulation method, a mobile station receives the PN-spread signal from the base station, PN-despreads the received signal with a PN code by a QPSK despreader, and orthogonally despreads the PN-despread signal with the assigned orthogonal code by a BPSK despreader. In both aspects, during the orthogonal despreading, the complex conjugate of the estimated pilot channel value is multiplied by the orthogonally despread signal, for compensation.
摘要:
An STD (Selection Transmit Diversity) communication method. In the method, a base station selects a transmission antenna corresponding to an antenna selection signal received from a terminal, transmits a traffic channel signal through the selected antenna, and transmits a predetermined part of the traffic channel signal through an unselected antenna.
摘要:
A device and method for cancelling code interference in a receiver of a CDMA (Code Division Multiple Access) communication system simultaneously using orthogonal codes and quasi-orthogonal codes are provided. In a receiver according to an embodiment of the present invention, a channel estimator produces a channel estimation value of a pilot channel signal spread by an orthogonal code through despeading. A quasi-orthogonal channel receiver receives a channel signal spread by a quasi-orthogonal code, despreads the channel signal, demodulates the despread channel signal by use of the channel estimation value, and provides an output. An interference estimator estimates an interference value of the pilot channel signal with the channel signal spread by the quasi-orthogonal code by obtaining a correlation value between the orthogonal code corresponding to a pilot channel and the quasi-orthogonal code corresponding to a quasi-orthogonal channel. An interference canceller cancels the estimated interference from the output of the quasi-orthogonal channel receiver.