Radio Communication Method and Radio Communication Terminal

• US 20100323642A1
• Filed: 08/29/2007
• Published: 12/23/2010
• Est. Priority Date: 08/30/2006
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Morita, Kugo
• Granted Patent: US 8,346,178 B2
• Time in Patent Office: Days
• US Class Current: 455/115.3
• CPC Class Codes: H04L 5/0066 Requirements on out-of-channel emissions
• CPC Class Codes: H04W 52/16 Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range

Abstract

The present invention is summarized as a radio communication method including the steps of: calculating a transmission power difference between transmission power values of the first carrier and the second carrier; determining whether the transmission power difference exceeds a threshold set on the basis of a maximum transmission power difference allowable between the first carrier and the second carrier; and stopping a transmission of reverse link data using one of the first carrier and the second carrier with a larger transmission power for a certain period in a case where the transmission power difference exceeds the threshold set on the basis of the maximum transmission power difference.

Claims

1. A radio communication method in reverse link by multicarrier using at least a first carrier and a second carrier that is adjacent to the first carrier with a predetermined frequency interval, the method comprising the steps of:

calculating a transmission power difference between a transmission power value of the first carrier and a transmission power value of the second carrier;

determining whether the transmission power difference exceeds a threshold set on the basis of a maximum transmission power difference allowable between the first carrier and the second carrier; and

stopping a transmission of reverse link data using one of the first carrier and the second carrier with a larger transmission power value for a certain period, in a case where the transmission power difference exceeds the threshold set on the basis of the maximum transmission power difference.

2. The radio communication method according to claim 1,

wherein the transmission power difference is calculated in a predetermined cycle in the step of calculating the transmission power difference,

the method further comprising the step of determining whether the transmission power difference is increasing, on the basis of the transmission power differences calculated in the predetermined cycle, wherein

in the step of stopping the transmission of the reverse link data, the transmission of reverse link data using one of the first carrier and the second carrier with a larger transmission power value is stopped for a certain period, in a case where the transmission power difference is determined as increasing.

3. A radio communication terminal performing communications by multicarrier using at least a first carrier and a second carrier that is adjacent to the first carrier with a predetermined frequency interval, the radio communication terminal comprising:

a transmission power difference calculator configured to calculate a transmission power difference between a transmission power value of the first carrier and a transmission power value of the second carrier;

a transmission power difference determination unit configured to determine whether the transmission power difference calculated by the transmission power difference calculator exceeds a threshold set on the basis of a maximum transmission power difference allowable between the first carrier and the second carrier; and

a communication controller configured to stop a transmission of reverse link data using one of the first carrier and the second carrier with a larger transmission power value for a certain period, in a case where the transmission power difference determination unit determines that the transmission power difference exceeds the threshold set on the basis of the maximum transmission power difference.

4. The radio communication terminal according to claim 3,

wherein the transmission power difference calculator calculates the transmission power difference in a predetermined cycle,

the radio communication terminal further comprising a power difference tendency determination unit configured to determine whether the transmission power difference is increasing, on the basis of the transmission power differences calculated by the transmission power difference calculator in the predetermined cycle, wherein

the communication controller stops the transmission of the reverse link data using one of the first carrier and the second carrier with a larger transmission power for a certain period in a case where the power difference tendency determination unit determines that the transmission power difference is increasing.