SPREAD SPECTRUM COMMUNICATION DEVICE AND SPREAD SPECTRUM COMMUNICATION METHOD
First Claim
1. A communication method applied to a mobile communication system in a code division multiple access system for continuously transmitting uncompressed frames in a normal mode and intermittently transmitting compressed frames in a compressed mode, in accordance with transmission power being controlled with a transmission power control step size, said method comprising:
- at a base station, transmitting transmission power control information to a mobile station, the power control information instructing increase or decrease of transmission power; and
at the mobile station, receiving the transmission power control information from the base station; and
adjusting the transmission power for the uncompressed frames and the compressed frames with the transmission power control step size based on the transmission power control information, wherein the adjusting step includes;
adjusting the transmission power with a first transmission power control step size for the uncompressed frames, and adjusting the transmission power with a plurality of transmission power control step sizes that include a second transmission power control step size larger than the first transmission power control step size for the compressed frames.
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Abstract
In a compressed mode, a spread spectrum communication device interleaves bit units across multiple frames using an interleaver, reduces the spreading factor using a framing/spreading unit, outputs the compressed mode frames at a predetermined compressed mode frame timing, and increases the average transmission power in the compressed mode at a radio frequency transmitter. Furthermore, a handover between different frequencies is carried out by establishing synchronization to another frequency carrier, based on a first search code and a second search code which have been detected, and moreover, a handover between different communication systems is carried out by establishing synchronization to a GSM, based on an FCCH and a SCH which have been detected.
41 Citations
8 Claims
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1. A communication method applied to a mobile communication system in a code division multiple access system for continuously transmitting uncompressed frames in a normal mode and intermittently transmitting compressed frames in a compressed mode, in accordance with transmission power being controlled with a transmission power control step size, said method comprising:
- at a base station,
transmitting transmission power control information to a mobile station, the power control information instructing increase or decrease of transmission power; and
at the mobile station,receiving the transmission power control information from the base station; and
adjusting the transmission power for the uncompressed frames and the compressed frames with the transmission power control step size based on the transmission power control information, wherein the adjusting step includes;
adjusting the transmission power with a first transmission power control step size for the uncompressed frames, and adjusting the transmission power with a plurality of transmission power control step sizes that include a second transmission power control step size larger than the first transmission power control step size for the compressed frames. - View Dependent Claims (2)
- at a base station,
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3. A communication method applied to a base station in a code division multiple access system for continuously transmitting uncompressed frames in a normal mode and intermittently transmitting compressed frames in a compressed mode, in accordance with transmission power being controlled with a transmission power control step size, said method comprising:
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receiving transmission power control information, the power control information instructing increase or decrease of transmission power; and
adjusting the transmission power for the uncompressed frames and the compressed frames with the transmission power control step size based on the transmission power control information, wherein the adjusting step includes;
adjusting the transmission power with a first transmission power control step size for the uncompressed frames, and adjusting the transmission power with a plurality of transmission power control step sizes that include a second transmission power control step size larger than the first transmission power control step size for the compressed frames. - View Dependent Claims (4)
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5. A mobile communication system in a code division multiple access system for continuously transmitting uncompressed frames in a normal mode and intermittently transmitting compressed frames in a compressed mode, in accordance with transmission power being controlled with a transmission power control step size, the system comprising:
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a base station including a transmitting unit configured to transmit transmission power control information to a mobile station, the power control information instructing increase or decrease of transmission power; and
the mobile station including a receiving unit that configured to receive the transmission power control information from the base station, and an adjusting unit configured to adjust the transmission power for the uncompressed frames and the compressed frames with the transmission power control step size based on the transmission power control information, wherein the adjusting unit is further configured to adjust the transmission power with a first transmission power control step size for the uncompressed frames, and to adjust the transmission power with a plurality of transmission power control step sizes that include a second transmission power control step size larger than the first transmission power control step size for the compressed frames. - View Dependent Claims (6)
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7. A base station in a code division multiple access system for continuously transmitting uncompressed frames in a normal mode and intermittently transmitting compressed frames in a compressed mode, in accordance with transmission power being controlled with a transmission power control step size, the base station comprising:
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a receiving unit configured to receive transmission power control information, the power control information instructing increase or decrease of transmission power; and
an adjusting unit that configured to adjust the transmission power for the uncompressed frames and the compressed frames with the transmission power control step size based on the transmission power control information, wherein the adjusting unit is further configured to adjust the transmission power with a first transmission power control step size for the uncompressed frames, and adjusts the transmission power with a plurality of transmission power control step sizes that include a second transmission power control step size larger than the first transmission power control step size for the compressed frames. - View Dependent Claims (8)
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Specification