WO2000057573A1 - Reglage initial de la puissance d'emission pour la voie aval dans les systemes de telecommunication w-cdma - Google Patents

Reglage initial de la puissance d'emission pour la voie aval dans les systemes de telecommunication w-cdma Download PDF

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Publication number
WO2000057573A1
WO2000057573A1 PCT/DE2000/000874 DE0000874W WO0057573A1 WO 2000057573 A1 WO2000057573 A1 WO 2000057573A1 DE 0000874 W DE0000874 W DE 0000874W WO 0057573 A1 WO0057573 A1 WO 0057573A1
Authority
WO
WIPO (PCT)
Prior art keywords
transmission power
base station
value
delta
control value
Prior art date
Application number
PCT/DE2000/000874
Other languages
German (de)
English (en)
Inventor
Markus Dillinger
Hans Kröner
Bernhard Raaf
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2000057573A1 publication Critical patent/WO2000057573A1/fr

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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
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/265—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the quality of service QoS
    • 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
    • H04W52/38—TPC being performed in particular situations
    • H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment

Definitions

  • the invention relates to a method and a subscriber station which are designed for setting the transmission power for a base station.
  • the invention relates in particular to the initial transmission power setting of the base station for a connection to the subscriber station within a W-CDMA radio communication system.
  • messages for example voice, image information or other data
  • the radio interface relates to a connection between a base station and subscriber stations, it being possible for the subscriber stations to be mobile stations or fixed radio stations.
  • the electromagnetic waves are emitted at carrier frequencies that lie in the frequency band provided for the respective system.
  • UMTS Universal Mobile Telecommunication System
  • 3rd generation systems frequencies in the frequency band of approx. 2000 MHz are provided.
  • the 3rd generation radio communication systems are to use a subscriber separation method known as CDMA (Code Division Multiple Access). If the frequency band used is broadband, the radio interface is organized as a W-CDMA (wideband CDMA) radio interface.
  • CDMA Code Division Multiple Access
  • W-CDMA wideband CDMA
  • ARIB Specification "Specification of Air-Interface for 3G Mobile System", Vol. 3, dated January 14, 1999, does not contain any information about the initial transmission power, i.e. before the closed loop in the connection regulates the transmission power.
  • the invention is therefore based on the object of specifying a method and a subscriber station which result in an improved transmission power setting for the initial phase of a connection.
  • the object is achieved by the method with the features of claim 1 and the subscriber station with the features of claim 10.
  • Advantageous developments of the invention can be found in the subclaims.
  • base stations and subscriber stations are connected to one another via a radio interface.
  • a subscriber station receives transmissions from a base station and uses this to determine a measured value for the transmission power setting.
  • the partial subscriber station a service-dependent transmission power value with the measured value to a control value and transmits this control value to the base station, which uses the control value for the transmission power setting . Because a connection to the desired service is immediately established, the base station can calculate and set the necessary transmission power for the next transmissions to the subscriber station without further inquiries.
  • the transmission power setting is particularly fast if the control value is transmitted in an RACH channel.
  • the RACH channel Random Access Channel
  • the correct transmission power value can thus already be established for the first, the initial transmission of a connection.
  • measurement and transmission power values are related to reception powers or to signal / noise ratios. These values can be easily determined in the subscriber station and give one
  • the control value advantageously also takes into account a ratio of spreading factors between the received, measured transmissions and the desired service.
  • the ratio can be set for the service by separate information or a previously signaled or defined spreading factor.
  • the control value is based on a difference in the transmission powers or sig- nal / Rauschverhaltnisse the base station m gen a control channel and a channel for the desired service bezo ⁇ .
  • the base station from the control value and for example, the transmission power in the control channel used before, the benot costume transmission power itself quickly calculate.
  • the subscriber station can carry out the calculation if the transmission power in the organization channel is known, so that the control value is directly related to the transmission power of the base station for the desired service.
  • control value is related to a value which compares the measured value with a minimum value.
  • the minimum value is, for example, the minimum required reception power or the minimum required signal / noise ratio for a service.
  • the value range of the control value is reduced by reference to a minimum value, so that the control value can be encoded with a few bits. This ties up less transmission capacity.
  • FIG. 2 shows a procedure for setting the transmission power of a base station
  • FIG. 3 shows a schematic structure of a subscriber station.
  • connections VI, V2, V3 for the transmission of useful information ni and signaling information si as point-to-point connections between mobile stations MS and a base station BS and an organization channel BCCH as point-to-multipoint connection from the base station BS to the subscriber stations MS.
  • An operation and maintenance center OMC implements control and maintenance functions for the mobile radio system or for parts thereof. The functionality of this structure is different
  • Radio communication systems can be transmitted, in which the invention can be used, in particular for subscriber access networks with a wireless subscriber connection.
  • base station BS m send the organization channel BCCH with a constant and known transmission power.
  • the subscriber station MS receives the transmissions from the base stations BS and determines a measured value w in each case.
  • the base station BS is selected for which the best transmission conditions exist (e.g. lowest attenuation or best signal / noise ratio).
  • the subscriber station MS also stores a service-dependent transmission power value sw, which is linked by the subscriber station MS to the measured value mw.
  • the service-dependent transmission power value sw is for a voice service or for agreed packet data services differently and takes into account individual quality of service.
  • a control value delta is determined from both values mw, sw, which is transmitted to the base station BS in a channel with random access R ⁇ CH, RACH channel (Random Access Channel).
  • This transmission also contains, for example, a request for resource allocation or short data packets for a packet data transmission.
  • the base station BS receives the control value delta, determines the transmission power P desired by the subscriber station MS and sets this already in the next transmission to this subscriber station MS in a channel FACH (Forward Access Channel) of the connection.
  • FACH Forward Access Channel
  • Receive power RMS BCCH of the transmissions of the base station BS in the BCCH at the subscriber station MS - signal-to-noise ratio SIRMS, BCCH of the transmissions of the base station BS in the BCCH at the subscriber station MS
  • Transmission power value sw for the desired service (service) required receiving power RMS, S ervice of emissions of the base station BS at the subscriber station MS - for the desired service (service) required signal / noise ratio SIR ⁇ S, S of the transmissions ervice the base station BS at the subscriber station MS
  • BCCH is the transmission power of the base station BS in the organization channel BCCH, and PB S, Se r vice desired Sen ⁇ de carte the base station BS for the service (Service).
  • the final calculation of the transmission power of the base station BS is carried out at 2) to 4) by the base station BS.
  • the calculation has already been carried out by the subscriber station MS.
  • the selected spreading factors SF in the organization channel BCCH and in the channel FACH of the connection must be taken into account.
  • the spreading factor SFB CCH is fixed and known.
  • the spreading factor SFservice to be selected for the transmission from the base station BS to the subscriber station MS of the service can either be set permanently, during the establishment of the connection context or can be signaled in the transmission of the subscriber station MS to the base station BS in the RACH channel.
  • Variant 4 offers particular advantages, since the received signal / noise ratio SIR MS BCCH is compared with a minimum value mw in, which relates to a minimum signal / noise ratio SIR MS BCCH of the organization channel BCCH for the service. Particularly high-rate data services can only be received in a radio cell at a short distance from the base station BS, since otherwise the transmission power of the base station Station BS had to be too big.
  • the minimum value thus specifies a service-dependent threshold value for reception.
  • the difference according to 4) can be coded with just a few bits, since the range of values is much smaller than when the received signal / noise ratio is signaled
  • a subscriber station MS receives the transmissions from the base station BS of the organization channel BCCH as received signals via an antenna device AE.
  • the received signals are amplified in a HF part HF-T, filtered and fed to a receiving device RXE, which is digitized and further signal evaluated.
  • An evaluation device AU determines a measured value mw for setting the transmission power from the transmissions of the base station BS and carries out a calculation of the control value delta, the service-dependent transmission power value sw being taken into account.
  • the service-dependent transmission power value sw is stored in a memory device SP and can be called up by the evaluation device AU. Furthermore, the evaluation device AU initiates the transmission of the control value delta via a transmission device TXE and the antenna device AE to the base station BS.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé qui permet de régler la puissance d'émission dans un système de télécommunication dans lequel les stations de base et les stations mobiles sont reliées par une interface radio. Une station mobile reçoit d'une station de base des données à partir desquelles elle détermine une valeur de mesure pour le réglage de la puissance d'émission. Selon l'invention, la station mobile relie à ladite valeur une valeur de puissance d'émission dépendante du service, de façon à obtenir une valeur de réglage, puis elle transmet ladite valeur de réglage à la station de base, qui l'utilise pour régler la puissance d'émission. Le fait qu'une référence au service désiré est immédiatement établie permet à la station de base, sans autre demande, de calculer et de régler la puissance nécessaire à l'émission des données suivantes.
PCT/DE2000/000874 1999-03-24 2000-03-21 Reglage initial de la puissance d'emission pour la voie aval dans les systemes de telecommunication w-cdma WO2000057573A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999113371 DE19913371A1 (de) 1999-03-24 1999-03-24 Initiale Sendeleistungseinstellung für die Abwärtsrichtung von W-CDMA Funk-Kommunikationssystemen
DE19913371.9 1999-03-24

Publications (1)

Publication Number Publication Date
WO2000057573A1 true WO2000057573A1 (fr) 2000-09-28

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PCT/DE2000/000874 WO2000057573A1 (fr) 1999-03-24 2000-03-21 Reglage initial de la puissance d'emission pour la voie aval dans les systemes de telecommunication w-cdma

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DE (1) DE19913371A1 (fr)
WO (1) WO2000057573A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002056498A2 (fr) * 2001-01-12 2002-07-18 Telefonaktiebolaget Lm Ericsson (Publ) Commande de puissance liaison descendante d'une voie de transport commune
WO2004073203A1 (fr) * 2003-02-13 2004-08-26 Siemens Aktiengesellschaft Procede de reglage des puissances d'emission de deux canaux d'une liaison, station et systeme de communication

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10254182A1 (de) * 2002-11-20 2004-01-15 Siemens Ag Verfahren zur Sendeleistungssteuerung einer ersten Station in einem Kommunikationssystem durch eine zweite Station sowie erste und zweite Station und Kommunikationssystem

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0639896A1 (fr) * 1993-08-20 1995-02-22 AT&T Corp. Procédé et dispositif pour commander un réseau CDMA utilisant un contrôle de puissance
EP0680159A2 (fr) * 1994-04-28 1995-11-02 AT&T Corp. Procédé et dispositif de commande de la puissance de transmission pour différents types de dispositifs sans fil dans un système AMDC
US5487180A (en) * 1993-09-20 1996-01-23 Fujitsu Limited Method of determining initial transmission power
WO1997002665A2 (fr) * 1995-06-30 1997-01-23 Interdigital Technology Corporation Systeme de commande de puissance automatique destine a un systeme de telecommunications a acces multiple par code de repartition (amcr)
WO2000008706A2 (fr) * 1998-08-01 2000-02-17 Samsung Electronics Co., Ltd. Dispositif et procede de commande de la puissance d'emission initiale d'une voie de liaison aller dans un systeme de telecommunications mobiles

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5732328A (en) * 1995-04-25 1998-03-24 Lucent Technologies Inc. Method for power control in wireless networks for communicating multiple information classes
JP3202658B2 (ja) * 1997-06-20 2001-08-27 日本電気株式会社 可変レートｃｄｍａ送信電力制御方式

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0639896A1 (fr) * 1993-08-20 1995-02-22 AT&T Corp. Procédé et dispositif pour commander un réseau CDMA utilisant un contrôle de puissance
US5487180A (en) * 1993-09-20 1996-01-23 Fujitsu Limited Method of determining initial transmission power
EP0680159A2 (fr) * 1994-04-28 1995-11-02 AT&T Corp. Procédé et dispositif de commande de la puissance de transmission pour différents types de dispositifs sans fil dans un système AMDC
WO1997002665A2 (fr) * 1995-06-30 1997-01-23 Interdigital Technology Corporation Systeme de commande de puissance automatique destine a un systeme de telecommunications a acces multiple par code de repartition (amcr)
WO2000008706A2 (fr) * 1998-08-01 2000-02-17 Samsung Electronics Co., Ltd. Dispositif et procede de commande de la puissance d'emission initiale d'une voie de liaison aller dans un systeme de telecommunications mobiles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002056498A2 (fr) * 2001-01-12 2002-07-18 Telefonaktiebolaget Lm Ericsson (Publ) Commande de puissance liaison descendante d'une voie de transport commune
WO2002056498A3 (fr) * 2001-01-12 2002-11-07 Ericsson Telefon Ab L M Commande de puissance liaison descendante d'une voie de transport commune
WO2004073203A1 (fr) * 2003-02-13 2004-08-26 Siemens Aktiengesellschaft Procede de reglage des puissances d'emission de deux canaux d'une liaison, station et systeme de communication

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Publication number Publication date
DE19913371A1 (de) 2000-10-19

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