Spread spectrum communication device and spread spectrum communication method
First Claim
1. A spread spectrum communication method applied to a mobile communication system in a code division multiple access system transmitting an uncompressed frame and a compressed frame, wherein the compressed frame has a transmission gap characterized by at a base station, transmitting transmission power control information indicating an increase or a decrease in power to a mobile station;
- at a mobile station, receiving transmission power control information from the base station;
adjusting transmission power on the uncompressed and the compressed frames in accordance with the transmission power control information, by increasing or decreasing current power with a first power control step size for the uncompressed frames, and with a plurality of power control steps size for the compressed frames; and
transmitting the uncompressed and the compressed frames in accordance with the adjusted transmission power;
wherein said transmission gap is used to observe other frequency career.
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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.
44 Citations
4 Claims
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1. A spread spectrum communication method applied to a mobile communication system in a code division multiple access system transmitting an uncompressed frame and a compressed frame, wherein the compressed frame has a transmission gap characterized by
at a base station, transmitting transmission power control information indicating an increase or a decrease in power to a mobile station; -
at a mobile station, receiving transmission power control information from the base station;
adjusting transmission power on the uncompressed and the compressed frames in accordance with the transmission power control information, by increasing or decreasing current power with a first power control step size for the uncompressed frames, and with a plurality of power control steps size for the compressed frames; and
transmitting the uncompressed and the compressed frames in accordance with the adjusted transmission power;
wherein said transmission gap is used to observe other frequency career.
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2. A spread spectrum communication method applied to a mobile communication system in a code division multiple access system transmitting an uncompressed frame and a compressed frame, wherein the compressed frame has a transmission gap characterized by
at a mobile station, transmitting transmission power control information indicating an increase or a decrease in power to a base station; -
at a base station, receiving transmission power control information from the mobile station;
adjusting transmission power on the uncompressed and the compressed frames in accordance with the transmission power control information, by increasing or decreasing current power with a first power control step size for the uncompressed frames, and with a plurality of power control steps size for the compressed frames; and
transmitting the uncompressed and the compressed frames in accordance with the adjusted transmission power;
wherein said transmission gap is used to observe other frequency career.
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3. A spread spectrum communication method applied to a base station in a code division multiple access system transmitting an uncompressed frames and a compressed frame, wherein the compressed frame has a transmission gap characterized by
receiving transmission power control information indicating an increase or a decrease in power from a mobile station; -
adjusting transmission power on the uncompressed and the compressed frames in accordance with the transmission power control information, by increasing or decreasing current power with a first power control step size for the uncompressed frames, and with a plurality of power control step sizes for the compressed frames; and
transmitting the uncompressed and the compressed frames in accordance with the adjusted transmission power;
wherein said transmission gap is used to observe other frequency career.
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4. A spread spectrum communication method applied to a mobile station in a code division multiple access system transmitting an uncompressed frames and a compressed frame, wherein the compressed frame has a transmission gap characterized by
receiving transmission power control information indicating an increase or a decrease in power from a base station; -
adjusting transmission power on the uncompressed and the compressed frames in accordance with the transmission power control information, by increasing or decreasing current power with a first power control step size for the uncompressed frames, and with a plurality of power control step sizes for the compressed frames; and
transmitting the uncompressed and the compressed frames in accordance with the adjusted transmission power;
wherein said transmission gap is used to observe other frequency career.
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Specification