Mobile station apparatus and transmission power control method

• US 6,912,405 B2
• Filed: 03/29/2001
• Issued: 06/28/2005
• Est. Priority Date: 03/30/2000
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Hiramatsu, Katsuhiko, Kitade, Takashi
• Primary Examiner(s): Maung, Nay
• Assistant Examiner(s): SOBUTKA, PHILIP
• Application Number:
  US09/979,721
• Publication Number:
  US 20020160802A1
• Time in Patent Office: 1,552 Days
• Field of Search: 455/522, 455/69, 455/442, 455436- 9, 455/452.1, 455/452.2, 375/299, 370331- 4
• US Class Current: 455/522
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters

Abstract

A propagation loss measuring section 207 appropriately changes a measuring method according to the reception type of system informed from a base station so as to measure propagation losses. A propagation loss comparator 209 compares the propagation loss between the respective cells. A transmission slot controller 210 controls a data assembling section 211 and spreader 213 in such a way to transmit a signal to a base station existing in a cell with a smaller propagation loss. A transmission power controller 208 controls a RF section 202 in such a way to transmit a signal with a transmission power value obtained by adding the propagation loss value at each cell to a target reception power value at each base station.

Claims

1. A mobile station apparatus comprising:

a measurer that measures individual propagation losses of a plurality of propagation paths while changing a method of measurement according to a type of reception employed in a base station apparatus, said type of reception being one of combining-type reception and selecting-type reception;

a controller that determines a transmission power based on a measured propagation loss; and

a transmitter that transmits a signal with the transmission power, through a propagation path of minimum propagation loss among the plurality of propagation paths.

2. The mobile station apparatus according to claim 1, wherein said measurer changes the method of measurement with reference to reception type information reported from the base station apparatus.

3. The mobile station apparatus according to claim 1, wherein:

said measurer measures propagation losses of propagation paths from a plurality of cells, and

said transmitter transmits the signal to the base station apparatus that corresponds to a cell of minimum propagation loss among the plurality of cells.

4. The mobile station apparatus according to claim 1, wherein:

said measurer measures propagation losses of propagation paths from a plurality of sectors, and

said transmitter transmits the signal to an antenna that corresponds to a sector of minimum propagation loss among the plurality of sectors.

5. The mobile station apparatus according to claim 1, wherein said measurer comprises:

a reception power measurer that measures reception power of;

a signal in which signals received through the plurality of propagation paths are combined, when the base station apparatus employs the combining-type reception, and

each of the signals received through the plurality of propagation paths, when the base station apparatus employs the selecting-type reception; and

a propagation loss measurer that measures the propagation loss of each propagation path based on the measured reception power and a transmission power used by the base station apparatus to transmit the signal through the propagation path.

6. A mobile communication system comprising a base station apparatus and a mobile station apparatus, wherein:

said base station apparatus reports a type of reception employed in said base station apparatus to said mobile station apparatus, said type of reception being one of combining-type reception and selecting-type reception; and

said mobile station apparatus;

measures propagation losses of a plurality of propagation paths while changing a method of measurement according to the type of reception reported from said base station apparatus;

determines a transmission power based on a measured propagation loss; and

transmits a signal with the transmission power, through a propagation path of minimum propagation loss among the plurality of propagation paths.

7. A transmission power control method comprising:

measuring individual propagation losses of a plurality of propagation paths while changing a method of measurement according to a type of reception employed in a base station apparatus, said type of reception being one of combining-type reception and selecting-type reception; and

transmitting a signal with a transmission power determined based on a measured propagation loss, through a propagation path of minimum propagation loss among the plurality of propagation paths.