Method and apparatus for transmitting data packets over voice channel
First Claim
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1. A system for acquiring a channel in radio packet data communication for use with a base station and a mobile station, in communication with said base station, for transmitting a voice burst, comprising:
- a receiver for receiving said voice burst and measuring a receiving level thereof;
a ranking section for ranking a receiving state of said receiver based on receiving levels of radio waves transmitted from said mobile station; and
a channel monitoring and control section for selecting a channel with a predetermined receiving state based on an output from said ranking section, and for monitoring the receiving state of the channel,wherein, for packet data communication, said mobile station selectively uses an idle channel and other channels engaged for voice communication by other mobile stations such that when said mobile station is determined not to be transmitting a voice burst on the channel, said channel is interrupted and packet data is transmitted thereover, andwherein, when a voice burst is transmitted on said channel during transmission of said packet data, the transmission of packet data is suspended, and a second mobile station not transmitting a voice burst is identified, thereby to obtain said idle channel for said radio packet data communication.
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Abstract
A communication system includes a first station in voice communication with a base station and a second station in data communication with the base station. The second station monitors the voice communication and identifies predetermined periods (e.g., preferably silent periods) of the voice communication. The second station transmits data packets during the predetermined periods.
91 Citations
29 Claims
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1. A system for acquiring a channel in radio packet data communication for use with a base station and a mobile station, in communication with said base station, for transmitting a voice burst, comprising:
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a receiver for receiving said voice burst and measuring a receiving level thereof; a ranking section for ranking a receiving state of said receiver based on receiving levels of radio waves transmitted from said mobile station; and a channel monitoring and control section for selecting a channel with a predetermined receiving state based on an output from said ranking section, and for monitoring the receiving state of the channel, wherein, for packet data communication, said mobile station selectively uses an idle channel and other channels engaged for voice communication by other mobile stations such that when said mobile station is determined not to be transmitting a voice burst on the channel, said channel is interrupted and packet data is transmitted thereover, and wherein, when a voice burst is transmitted on said channel during transmission of said packet data, the transmission of packet data is suspended, and a second mobile station not transmitting a voice burst is identified, thereby to obtain said idle channel for said radio packet data communication. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for acquiring a channel in radio packet data communication for use with a base station and a mobile station, in communication with said base station, for transmitting a voice burst, comprising:
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a receiver for receiving said voice burst and measuring a receiving level thereof; a ranking section for ranking a receiving state of said receiver based on receiving levels of radio waves transmitted from said mobile station; and a channel monitoring and control section for selecting a channel with a predetermined receiving state based on an output from said ranking section, and for monitoring the receiving state of the channel, wherein, when said mobile station is determined not to be transmitting a voice burst on the channel, said channel is interrupted and packet data is transmitted thereover, and wherein, when a voice burst is transmitted on said channel during transmission of said packet data, the transmission of packet data is suspended, and a second mobile station not transmitting a voice burst is identified, thereby to obtain an idle channel for radio packet data communication, wherein said ranking section comprises; a power level measuring section for measuring a power level of said receiving levels of radio waves transmitted from said mobile station; a power level comparing section for comparing said power level with a predetermined level; a memory for storing levels of channels determined to have a level above said predetermined level and a respective channel number; and a level selection section for selecting a channel having a highest level of said channels determined to have a level above said predetermined level, said level selection section providing an output to said channel monitoring and control section. - View Dependent Claims (12)
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13. A system for acquiring a channel in radio packet data communication for use with a base station and a mobile station, in communication with said base station, for transmitting a voice burst, comprising:
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a receiver for receiving said voice burst and measuring a receiving level thereof; a ranking section for ranking a receiving state of said receiver based on receiving levels of radio waves transmitted from said mobile station; and a channel monitoring and control section for selecting a channel with a predetermined receiving state based on an output from said ranking section, and for monitoring the receiving state of the channel, wherein, when said mobile station is determined not to be transmitting a voice burst on the channel, said channel is interrupted and packet data is transmitted thereover, and wherein, when a voice burst is transmitted on said channel during transmission of said packet data, the transmission of packet data is suspended, and a second mobile station not transmitting a voice burst is identified, thereby to obtain an idle channel for radio packet data communication, wherein said channel monitoring and control section comprises; a postamble monitoring/supervising section for receiving an output from said ranking section and for monitoring postambles of a selected channel, such that packet data is transmitted when a postamble is received by said channel monitoring and control section; and a collision monitoring section for determining whether a collision has occurred between said voice burst and said packet data, wherein, when said collision monitoring section detects a collision, said collision monitoring section provides an output to terminate said radio packet data communication, and when no collision is detected by said collision monitoring section, said radio data packet communication continues to completion.
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14. A communication system comprising:
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a base station; a first station in voice communication with said base station; and a second station in data communication with said base station, wherein said second station monitors said voice communication and identifies a predetermined period of said voice communication, said second station transmitting data packets during said predetermined period, wherein, for packet data communication, said second station selectively uses an idle channel and other channels engaged, for voice communication, by mobile stations. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A communication system comprising:
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a base station; a first station in voice communication with said base station; a second station in data communication with said base station, wherein said second station monitors said voice communication and identifies a predetermined period of said voice communication, said second station transmitting data packets during said predetermined period, and wherein said first station comprises a first mobile station and said second station comprises a second mobile station, said predetermined period comprising a silent period between audible sounds; and a plurality of first mobile stations, and said base station communicates with said first mobile stations on separate channels, wherein said second mobile station includes means for monitoring said channels and for transmitting said data packets on selected ones of said separate channels which include said predetermined period, and means for ranking a receiving level of each of said channels. - View Dependent Claims (21, 22, 23)
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24. A method for acquiring a channel in radio packet data communication system including a base station and a mobile station, in communication with said base station, for transmitting a voice burst, comprising:
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receiving said voice burst and measuring a receiving level thereof; ranking a receiving state based on receiving levels of radio waves transmitted from said mobile station; selecting a channel with a predetermined receiving state based on said ranking, and monitoring the receiving state of the channel; determining whether said mobile station is not transmitting a voice burst on the channel; based on said determining, interrupting said channel and transmitting packet data thereover; and when said determining determines a voice burst is transmitted on said channel during transmission of said packet data, suspending the transmission of said packet data, and identifying a second mobile station not transmitting a voice burst, thereby to obtain an idle channel for radio packet data communication. - View Dependent Claims (25, 26, 27, 28, 29)
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Specification