Abstract
PROBLEM TO BE SOLVED: To allow a transmission power to be controlled with a small number of signals in a cellular wireless system taking into account a specific need of a packet switching link.
SOLUTION: A terminal device measures a control signal from a base station in a long break period between packets and prior connection establishment (30 31) and compares the signal power (R0) with a target level that the base station holds. The base station also informs the transmission power to the terminal device by the control signal and the terminal device determines the transmission power by correcting the power by a difference (t0-R0) between the target level and link quality measured (32). The link quality measured (RXQUAL) is also transmitted by a positive response message and the transmission power is changed at a transmission side so that the quality becomes a predetermined target level. The maximum change width is determined by the packet length. At packet transfer to the downlink the base station first uses the maximum power and then corrects it based on the measurement information in the acknowledgement.
COPYRIGHT: (C)2009JPO&INPIT
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
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