초록 ▼

A method and system for transmitting short data messages in a control station-based TDMA radiocommunication system. Selected TDMA frames are assigned as message frames, and one or more data slots from each message frame are assigned to transmitter/receivers. Data messages can be encoded and transmit

A method and system for transmitting short data messages in a control station-based TDMA radiocommunication system. Selected TDMA frames are assigned as message frames, and one or more data slots from each message frame are assigned to transmitter/receivers. Data messages can be encoded and transmitted multiple times, at an increased power level, from a control station to a transmitter/receiver over the appropriate data slots in each message frame. The selected TDMA frames are preferably slow associated control channel frames. Also, short alphanumeric messages can be transmitted over the broadcast control channel of a digital radiocommunication link, or another communication channel consisting of one or more slots from successive frames in a TDMA communication link. An increase in transmission power is used in combination with repetition to increase effective signal margin without complications in the mobile unit design, significant delay, or co-channel interference. Where a more significant increase in signal margin is desired, when a longer message is required, or for voice messages, the message may be stored and the mobile unit alerted of the message.

대표청구항 ▼

1. A method for transmitting a short message service (SMS) data message over a TDMA communication channel having a plurality of frame sets, each frame set including a plurality of frames, wherein a subset of said plurality of frames are control channel frames for carrying control channel information

1. A method for transmitting a short message service (SMS) data message over a TDMA communication channel having a plurality of frame sets, each frame set including a plurality of frames, wherein a subset of said plurality of frames are control channel frames for carrying control channel information at a first signal margin, the method comprising;encoding said SMS data message to form an encoded data message; and transmitting said encoded data message over a message channel at a second signal margin higher than the first signal margin, the message channel comprising one or more of said control channel frames; wherein a portion of said second signal margin is obtained by transmitting said encoded data message at an increased transmit power, and another portion of said second signal margin is obtained by dividing the SMS data message into a plurality of packets of one or more bits, transmitting each packet a plurality of times, and integrating the transmissions of each packet at a mobile station.