Apparatus and method for transmitting message in a mobile communication system
First Claim
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1. A method for transmitting a message on an uplink Random Access Channel (RACH) in a mobile communication system, comprising:
- generating a short message to be sent together with a preamble signal on the RACH, for uplink transmission;
spreading the short message and the preamble signal with different orthogonal spreading codes;
sending the short message and the preamble message together.
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Abstract
An apparatus and method for transmitting a message in a mobile communication system are provided, in which a short message is generated to be sent together with a preamble signal on the RACH, for uplink transmission, the short message and the preamble signal are spread with different orthogonal spreading codes, the phase of the short message is rotated to be orthogonal to the phase of the preamble signal, the phase-rotated short message is added to the preamble signal, and the sum is sent.
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Citations
23 Claims
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1. A method for transmitting a message on an uplink Random Access Channel (RACH) in a mobile communication system, comprising:
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generating a short message to be sent together with a preamble signal on the RACH, for uplink transmission;
spreading the short message and the preamble signal with different orthogonal spreading codes;
sending the short message and the preamble message together. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for transmitting a message on an uplink Random Access Channel (RACH) in a mobile communication system, comprising:
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a message generator for generating a short message to be sent together with a preamble signal on the RACH, for uplink transmission;
a spreader for spreading the short message and the preamble signal with different orthogonal spreading codes;
a transmitter for transmitting the short message and the preamble signal together. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for receiving a message on an uplink Random Access Channel (RACH) in a mobile communication system, comprising:
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receiving a message and a preamble signal simultaneously on the RACH, converting the received message and preamble signal to a digital signal, and storing the digital signal;
detecting a transmission signal from the preamble signal; and
demodulating and decoding the message, when the transmission signal is detected. - View Dependent Claims (21)
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22. An apparatus for receiving a message on an uplink Random Access Channel (RACH) in a mobile communication system, comprising:
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a receiver for receiving a message and a preamble signal simultaneously on the RACH, converting the received message and preamble signal to a digital signal, and storing the digital signal;
a searcher for detecting a transmission signal from the preamble signal and outputting a detection signal;
a controller for controlling demodulation and decoding of the message according to the detection signal; and
a modem for demodulating and decoding the message under the control of the controller. - View Dependent Claims (23)
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Specification