High power short message service using broadcast control channel
First Claim
1. A method for transmitting a subscriber-specific message to a user associated with a mobile receiver over a TDMA communication channel having a plurality of frame sets, each frame set including one or more frames, each frame having a plurality of time slots, each time slot transmitting a plurality of data bits, the method comprising the steps of:
- encoding data bits representing the subscriber-specific message to be transmitted to form one or more data codewords; and
transmitting each data codeword a plurality of times over a message channel, the message channel having a plurality of message frames, each message frame including one or more time slots from each frame set of one or more frames of the TDMA communication channel.
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Accused Products
Abstract
A method and system for increasing the signal margin of a radiocommunication link to provide a short message service which is reliable, even under non-ideal conditions. According to the method, 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.
92 Citations
20 Claims
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1. A method for transmitting a subscriber-specific message to a user associated with a mobile receiver over a TDMA communication channel having a plurality of frame sets, each frame set including one or more frames, each frame having a plurality of time slots, each time slot transmitting a plurality of data bits, the method comprising the steps of:
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encoding data bits representing the subscriber-specific message to be transmitted to form one or more data codewords; and transmitting each data codeword a plurality of times over a message channel, the message channel having a plurality of message frames, each message frame including one or more time slots from each frame set of one or more frames of the TDMA communication channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 20)
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11. A system for transmitting a subscriber-specific message to a user associated with a mobile receiver over a TDMA communication channel having a plurality of frame sets, each frame set including one or more frames, each frame having a plurality of time slots, each time slot transmitting a plurality of data bits, comprising:
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an encoder for encoding data bits representing the subscriber-specific message to be transmitted with error detection coding to form one or more data codewords; and a transmitter for transmitting each data codeword a plurality of times over a message channel, the message channel having a plurality of message frames, each message frame including one or more time slots from each frame set of one or more frames of the TDMA communication channel. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification