CA2149094A1 - Transmission Power Control Method of a Spread-Spectrum Communication System, and Spread-Spectrum Communication System Employing the Control Method - Google Patents

Transmission Power Control Method of a Spread-Spectrum Communication System, and Spread-Spectrum Communication System Employing the Control Method

Info

Publication number
CA2149094A1
CA2149094A1 CA2149094A CA2149094A CA2149094A1 CA 2149094 A1 CA2149094 A1 CA 2149094A1 CA 2149094 A CA2149094 A CA 2149094A CA 2149094 A CA2149094 A CA 2149094A CA 2149094 A1 CA2149094 A1 CA 2149094A1
Authority
CA
Canada
Prior art keywords
transmission power
power control
spread
communication system
control method
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2149094A
Other languages
French (fr)
Other versions
CA2149094C (en
Inventor
Tomohiro Dohi
Mamoru Sawahashi
Fumiyuki Adachi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Docomo Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2149094A1 publication Critical patent/CA2149094A1/en
Application granted granted Critical
Publication of CA2149094C publication Critical patent/CA2149094C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
    • H04W52/226—TPC being performed according to specific parameters taking into account previous information or commands using past references to control power, e.g. look-up-table
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
    • H04W52/221—TPC being performed according to specific parameters taking into account previous information or commands using past power control commands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/362—Aspects of the step size
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure

Abstract

A transmission power control method of a spread-spectrum communication system which determines transmission power in accordance with a transmission power control bit. The transmission power control bit is extracted at a base station from a signal sequence obtained by receiving a signal transmitted from a mobile station, and by despreading and demodulating the received signal. When the same value of the transmission power control bit is consecutively received, the transmission power of the base station is controlled in accordance with transmission power control quantities which are predetermined in accordance with the consecutive number of receptions of the same value of the transmission power control bit. This is because the consecutive receptions of the same value of the transmission power control bit suggests that the received power of the other party (the mobile station in this case) changes greatly. Thus, an amount of an increment or a decrement in the transmission power is increased with the duration of the consecutive receptions. This makes it possible for the transmission power control to follow sudden changes in propagation paths.
CA 2149094 1994-05-12 1995-05-10 Transmission power control method of a spread-spectrum communication system, and spread-spectrum communication system employing the control method Expired - Fee Related CA2149094C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP98,814/1994 1994-05-12
JP9881494 1994-05-12
JP77,935/1995 1995-04-03
JP7793595A JP2980156B2 (en) 1994-05-12 1995-04-03 Transmission power control method and spread spectrum communication apparatus using the control method

Publications (2)

Publication Number Publication Date
CA2149094A1 true CA2149094A1 (en) 1995-11-13
CA2149094C CA2149094C (en) 1998-08-04

Family

ID=26418987

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2149094 Expired - Fee Related CA2149094C (en) 1994-05-12 1995-05-10 Transmission power control method of a spread-spectrum communication system, and spread-spectrum communication system employing the control method

Country Status (7)

Country Link
US (1) US5604766A (en)
EP (1) EP0682417B1 (en)
JP (1) JP2980156B2 (en)
KR (1) KR0143836B1 (en)
CN (1) CN1042998C (en)
CA (1) CA2149094C (en)
DE (1) DE69532546T2 (en)

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Also Published As

Publication number Publication date
CA2149094C (en) 1998-08-04
KR0143836B1 (en) 1998-08-01
JP2980156B2 (en) 1999-11-22
JPH0832513A (en) 1996-02-02
EP0682417A3 (en) 1996-03-06
KR950035124A (en) 1995-12-30
EP0682417A2 (en) 1995-11-15
CN1042998C (en) 1999-04-14
DE69532546T2 (en) 2004-12-30
CN1117225A (en) 1996-02-21
DE69532546D1 (en) 2004-03-18
US5604766A (en) 1997-02-18
EP0682417B1 (en) 2004-02-11

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