Communication terminal apparatus

• US 6,799,053 B2
• Filed: 12/18/2002
• Issued: 09/28/2004
• Est. Priority Date: 08/02/2000
• Status: Expired due to Term

• Current Assignee: INVT SPE LLC (FIG LLC (d/b/a Fortress Investment Group LLC))
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Aizawa, Junichi, Miyoshi, Kenichi, Kato, Osamu
• Primary Examiner(s): Trost, William
• Assistant Examiner(s): Le, Danh C
• Application Number:
  US10/321,500
• Publication Number:
  US 20030087662A1
• Time in Patent Office: 650 Days
• Field of Search: 455/522, 455/127.1, 455/67.13, 455/69, 455/452.2, 370/318, 370/310, 370/355, 370/342, 370/441, 375/141, 375/145, 375/149
• US Class Current: 455/522
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 52/247 where the output power of a terminal is based on a path parameter sent by another terminal
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

A communication mode determination section 201 determines the communication mode based on the CIR measured by a CIR measurement section 219; a DRC signal creation section 202 creates a DRC signal with a number corresponding to the communication mode; and a DRC power controller 205 refers to a transmission power table 206 showing the correspondence between DRC numbers and transmission power, and, based on the transmission power of the pilot signal output from a pilot power controller 209, increases transmission power in proportion as the DRC signal indicates that downlink channel quality is good.

Claims

1. A communication terminal apparatus comprising:

a measurer that measures a downlink channel quality and outputs information that is generated in association with said downlink channel quality and composed of a plurality of digits including an upper digit and a lower digit;

a coder that encodes the upper digit to a first code word and encodes the lower digit to a second code word having a shorter code word minimum distance than the first code word, and

a transmitter that transmits the first and second code words to a base station apparatus.

2. The communication terminal apparatus according to claim 1, further comprising a multiplexer that places the second code word after the first code word and time-multiplexes the first and second code words, wherein said transmitter transmits the multiplexed first and second code words.

3. A communication terminal apparatus comprising:

a measurer that measures a downlink channel quality and outputs information that is generated in association with said downlink channel quality and composed of a plurality of digits including an upper digit and a lower digit;

a coder that encodes the upper digit to a first code word and encodes the lower digit to a second code word having a smaller number of bits than the first code word; and

a transmitter that transmits the first and second code words to a base station apparatus.

4. The communication terminal apparatus according to claim 3, further comprising a multiplexer that places the second code word after the first code word and time-multiplexes the first and second code words, wherein said transmitter transmits the multiplexed first and second code words.