CA2230778A1 - Transmitted power controller - Google Patents

Transmitted power controller

Info

Publication number
CA2230778A1
CA2230778A1 CA002230778A CA2230778A CA2230778A1 CA 2230778 A1 CA2230778 A1 CA 2230778A1 CA 002230778 A CA002230778 A CA 002230778A CA 2230778 A CA2230778 A CA 2230778A CA 2230778 A1 CA2230778 A1 CA 2230778A1
Authority
CA
Canada
Prior art keywords
received signal
error rate
power controller
transmitted power
frame
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
CA002230778A
Other languages
French (fr)
Other versions
CA2230778C (en
Inventor
Tomohiro Dohi
Shunsuke Seo
Yukihiko Okumura
Mamoru Sawahashi
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
Ntt Mobile Communications Network Inc.
Tomohiro Dohi
Shunsuke Seo
Yukihiko Okumura
Mamoru Sawahashi
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=15842550&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2230778(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ntt Mobile Communications Network Inc., Tomohiro Dohi, Shunsuke Seo, Yukihiko Okumura, Mamoru Sawahashi filed Critical Ntt Mobile Communications Network Inc.
Publication of CA2230778A1 publication Critical patent/CA2230778A1/en
Application granted granted Critical
Publication of CA2230778C publication Critical patent/CA2230778C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • 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
    • H04W52/12—Outer and inner loops
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H04L1/0019—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy in which mode-switching is based on a statistical approach
    • H04L1/002—Algorithms with memory of the previous states, e.g. Markovian models
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H04L1/203—Details of error rate determination, e.g. BER, FER or WER
    • 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
    • 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
    • H04W52/20—TPC being performed according to specific parameters using error rate
    • 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
    • H04W52/08—Closed loop 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
    • H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
    • H04W52/225—Calculation of statistics, e.g. average, variance
    • 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

Abstract

An error rate of received signal is measured by a received signal error measuring unit 32, and a target SIR is changed by a target SIR decision unit using the error rate. It is also possible to detect error rate of received signal in a unit of frame using a CRC signal of a frame. It is further possible to detect error rate of received signal by detecting errors of known pilot signals inserted in a constant interval.
CA002230778A 1996-06-27 1997-06-26 Transmitted power controller Expired - Fee Related CA2230778C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP167,054/1996 1996-06-27
JP16705496 1996-06-27
PCT/JP1997/002215 WO1997050197A1 (en) 1996-06-27 1997-06-26 Transmitted power controller

Publications (2)

Publication Number Publication Date
CA2230778A1 true CA2230778A1 (en) 1997-12-31
CA2230778C CA2230778C (en) 2002-12-03

Family

ID=15842550

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002230778A Expired - Fee Related CA2230778C (en) 1996-06-27 1997-06-26 Transmitted power controller

Country Status (8)

Country Link
US (1) US6341224B1 (en)
EP (1) EP0853393B1 (en)
JP (1) JP3660690B2 (en)
KR (1) KR100309652B1 (en)
CN (1) CN1102308C (en)
CA (1) CA2230778C (en)
DE (1) DE69729784T2 (en)
WO (1) WO1997050197A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2009217367B2 (en) * 2001-05-14 2012-01-12 Interdigital Technology Corporation Channel quality measurements for downlink resource allocation
US9456449B2 (en) 2001-05-14 2016-09-27 Interdigital Technology Corporation Channel quality measurements for downlink resource allocation

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* Cited by examiner, † Cited by third party
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CN1198274A (en) 1998-11-04

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