Synchronization method and system for transmitting voice data in a mobile communication system
First Claim
1. A method for synchronizing transmission/reception time by a base station controller for delay in transmission/reception of a data frame of a digital voice signal in a mobile communication system which includes a media gateway and the base station controller, the media gateway including a trans-coder for converting an analog voice signal and a coded digital voice signal into each other, the base station controller transmitting/receiving the digital voice signal to/from the media gateway, the method comprising:
- checking whether or not forward data frames of the digital voice signal received from the media gateway are synchronized;
appointing information of a forward delay when the forward data frames are not synchronized, and notifying the media gateway of the appointed forward delay information and a reverse data frame of the voice signal received from a mobile station;
requesting time synchronization to the media gateway when synchronization is not established for the forward data frames received in sequence;
receiving information of transmission timing adjusted by the media gateway according to the requested time synchronization; and
synchronizing the forward data frames using the transmission timing information and transmitting the forward data frames to the mobile station.
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Accused Products
Abstract
A method and system for synchronizing transmission/reception timings delayed during transmission/reception of data frames for voice signals in a mobile communication system including a media gateway with a transcoder and a base station controller for exchanging digital voice signals with the media gateway. The media gateway or the base station controller performs synchronization control by detecting synchronization of forward data frames for the voice signals. As the base station controller requests synchronization, the media gateway adjusts transmission timing and acquires synchronization according to the adjusted transmission timing, thereby correctly transmitting/receiving data frames for the voice signals.
23 Citations
24 Claims
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1. A method for synchronizing transmission/reception time by a base station controller for delay in transmission/reception of a data frame of a digital voice signal in a mobile communication system which includes a media gateway and the base station controller, the media gateway including a trans-coder for converting an analog voice signal and a coded digital voice signal into each other, the base station controller transmitting/receiving the digital voice signal to/from the media gateway, the method comprising:
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checking whether or not forward data frames of the digital voice signal received from the media gateway are synchronized; appointing information of a forward delay when the forward data frames are not synchronized, and notifying the media gateway of the appointed forward delay information and a reverse data frame of the voice signal received from a mobile station; requesting time synchronization to the media gateway when synchronization is not established for the forward data frames received in sequence; receiving information of transmission timing adjusted by the media gateway according to the requested time synchronization; and synchronizing the forward data frames using the transmission timing information and transmitting the forward data frames to the mobile station. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for synchronizing transmission/reception time by a media gateway for delay in transmission/reception of a data frame of a digital voice signal in a mobile communication system which includes the media gateway and a base station controller, the media gateway including a trans-coder for converting an analog voice signal and a coded digital voice signal into each other, the base station controller transmitting/receiving the digital voice signal to/from the media gateway, the method comprising:
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checking whether or not reverse data frames of the digital voice signal received from the base station controller are synchronized; appointing information of a reverse delay when the reverse data frames are not synchronized, and notifying the base station controller of the appointed reverse delay information and a forward data frame of the digital voice signal; receiving a synchronization request from the base station controller when synchronization is not established for the reverse data frames received in sequence; adjusting transmission timing of the reverse data frame according to the synchronization request, and transmitting the adjusted information to the base station controller; and receiving the reverse data frame synchronized according to the adjusted transmission timing information from the base station controller. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A system for synchronizing transmission/reception time for delay in transmission/reception of a data frame of a digital voice signal in a mobile communication system which includes a media gateway and a base station controller, the media gateway including a trans-coder for converting an analog voice signal and a coded digital voice signal into each other, the base station controller transmitting/receiving the digital voice signal to/from the media gateway, the system comprising:
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the base station controller for transmitting information of a forward delay and reverse data frames of the digital voice signal, which is received from a mobile station, to the media gateway, receiving the information of the forward delay and the reverse delay, and performing a control for the synchronization; and the media gateway for transmitting information of a reverse delay to the base station controller when the media gateway receives forward data frames of voice signals from a called party, receiving the information of the forward delay and the reverse delay, and performing a control for the synchronization, wherein the base station controller checks whether or not forward data frames of the digital voice signal received from the media gateway are synchronized, requests time synchronization to the media gateway when synchronization is not established for the forward data frames received in sequence, receives information of transmission timing adjusted by the media gateway according to the time synchronization request, synchronizes the forward data frames, and transmits the forward data frames to the mobile station. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification