[go: up one dir, main page]

WO2006134032A1 - Method for establishing a connection by means of mobile terminals in communication networks with variable bandwidths - Google Patents

Method for establishing a connection by means of mobile terminals in communication networks with variable bandwidths Download PDF

Info

Publication number
WO2006134032A1
WO2006134032A1 PCT/EP2006/062791 EP2006062791W WO2006134032A1 WO 2006134032 A1 WO2006134032 A1 WO 2006134032A1 EP 2006062791 W EP2006062791 W EP 2006062791W WO 2006134032 A1 WO2006134032 A1 WO 2006134032A1
Authority
WO
WIPO (PCT)
Prior art keywords
transmitted
bcch
frequency
bandwidth
control channel
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.)
Ceased
Application number
PCT/EP2006/062791
Other languages
German (de)
French (fr)
Inventor
Volker Breuer
Michael Färber
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.)
Siemens AG
Nokia Solutions and Networks GmbH and Co KG
Siemens Corp
Original Assignee
Siemens AG
Nokia Siemens Networks GmbH and Co KG
Siemens Corp
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 AG, Nokia Siemens Networks GmbH and Co KG, Siemens Corp filed Critical Siemens AG
Publication of WO2006134032A1 publication Critical patent/WO2006134032A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Definitions

  • the present invention relates to a method and a device for connection establishment by mobile terminals in communication networks with variable bandwidths according to the independent claims 1 and 9.
  • the third generation of mobile communication systems provides a variety of services, including voice data transmission (telephone conversation) and other media data transmission services (e-mail, data downloads, instant messaging, video telephony).
  • voice data transmission telephone conversation
  • media data transmission services e-mail, data downloads, instant messaging, video telephony
  • the system bandwidth set in the previous 3G standard is 5Mhz.
  • 3GPP 3rd Generation Partnership Project
  • UMTS Universal Mobile Telecommunications System
  • UTRA UMTS Terrestrial Radio Access
  • UTRA offers variable system bandwidths of 1.25, 2.5, 5, 10, 15, and 20 MHz and it is a primary goal to keep access and response times as low as possible for all devices, the most important of which are radio control channels serve the transmission of network-specific parameters such as physical information for synchronization or cell-specific data sent in the downlink direction from the base station to the mobile terminals out.
  • the system bandwidth is fixed and thus known from the outset, as well as the lower and upper limits of the frequency band used.
  • the mobile terminals are known to use the frequency band used covering the range of 890 to 915 MHz with a 200 kHz wide carrier grid. This information can be used by the mobile devices to connect and in this way very quickly to the corresponding radio control channel (Broadcast Control Channel, short BCCH).
  • BCCH Broadcast Control Channel
  • the object of the invention is a method that allows mobile terminals in 3G mobile communication systems with variable system bandwidths an efficient connection setup.
  • a base station communicates using a certain system frequency and a certain bandwidth less than or equal to the maximum system bandwidth and a specific frame structure via a radio control channel with mobile terminals.
  • Network-specific system information is transmitted from the base station to the mobile terminals via the radio control channel.
  • one or more sets of permanently transmitted sub-carriers alpha, beta, gamma of predetermined frequency are combined to form at least one so-called beacon for transmission of frequency correction information, bandwidth used and frame structure used from the base station to the mobile
  • At least one first and at least one second of the permanently transmitted subcarriers alpha and gamma are used for frequency correction
  • at least one third of the permanently transmitted subcarriers beta transmits information about the bandwidth currently being used by the radio control channel BCCH and the frame structure used
  • the permanently transmitted subcarriers alpha and gamma are used by a mobile terminal in a first step of establishing a connection to synchronize the frequency used by the mobile terminal with the system frequency used.
  • the mobile terminal uses the information transmitted on the permanently transmitted subcarrier beta for the bandwidth currently being used by the radio control channel BCCH and for the frame structure used for the reconfiguration. After the mobile terminal has been reconfigured, the system information transmitted via the radio control channel is used for the complete establishment of the connection.
  • the invention comprises a device with means for carrying out the method presented above.
  • the present invention has the advantage that mobile terminals in variable bandwidth communication networks are enabled to establish an efficient connection by introducing a two-step method. For example, instead of letting the mobile terminals test all the bandwidths possible in the system until the currently used system bandwidth is found, sets of permanently transmitted adjacent subcarriers, English Beacons, are used to transmit the basic system information.
  • the beacons have previously defined positions in the frequency band, which are known to the mobile terminals, and these positions may also be locally separated relative to the radio cells.
  • the coding and structure of the subcarriers according to the invention allow a simultaneous estimation, for example, of the exact frequency, the frame structure, and further of system-specific information such as the bandwidth of the transmitted radio control channel BCCH. This information is spread in time by the mobile terminal known code sets.
  • MIMO Multiple Input, Multiple Output
  • the frequency correction based on the first and second permanently transmitted subcarriers alpha and gamma, is performed by means of a difference method.
  • the first permanently transmitted subcarrier Alpha is used for frequency correction in the direction of a lower frequency and the second permanently transmitted subcarrier gamma is used for frequency correction in the direction of a higher frequency.
  • the transmission of the bandwidth of the radio control channel BCCH takes place on the third permanently transmitted subcarrier beta by a suitable coding in the form of temporally repeatedly transmitted symbol sequences.
  • the symbols of the bit pattern transmitted in beta in combination with the symbols transmitted to the beta allow a more accurate identification of the code used for the transmission of the BCCH.
  • the radiation of the beacons can be spatially separated from one another in order to avoid interference between adjacent cells.
  • an encryption of the transmitted bits can be carried out to increase the reception sensitivity, preferably by 16-bit Walsh codes. This corresponds to a spreading of the information in time.
  • a specific network code is sent via the beacons, which in the case of "neighbor cell monitoring” makes it possible to check whether the operation of a mobile terminal in the relevant frequency band is permitted.
  • Fig. 1 the arrangement of the subcarrier alpha, beta and gamma and the radio control channel BCCH
  • FIG. 1 illustrates the temporal and frequency-related arrangement of the subcarriers alpha, beta and gamma as well as the radio control channel BCCH according to the invention.
  • the subcarriers alpha, beta and gamma and the radio control channel BCCH are constructed in the form of individual radio channels, preferably OFDM radio channels.
  • the present invention can also be applied to other systems.
  • the subcarrier beta is located between the subcarriers alpha and gamma.
  • Other variants of the arrangement of subcarriers are conceivable.
  • a mobile terminal For establishing a connection in a mobile radio communication network, a mobile terminal must perform an initial cell search.
  • the mobile terminal needs information about the current bandwidth of the radio control channel BCCH, the may be less than or equal to the system bandwidth, information about the system frequency and the frame structure used. Due to the variable system bandwidth in 3G wireless networks, a variety of system bandwidths is possible. The possible system bandwidths are known to the mobile terminal, but not the currently used bandwidth of the radio control channel BCCH.
  • the inventive method consists of two steps, which are explained below.
  • the method according to the invention is based on the concept of permanently transmitted subcarriers, English beacons, which constantly transmit the system information necessary for establishing a connection.
  • the OFDM downlink may be used for this purpose. OFDM transfers are done using a set of subcarriers.
  • a beacon is composed of several adjacent such subcarriers.
  • the embodiment of the invention shown in FIG. 1 uses three subcarriers.
  • the positions of the beacons in the frequency band are set by default.
  • the number of beacons used is a compromise of possible spectral capacity and overhead, as well as acceptable connection setup time requirements.
  • the number and locations of the beacons also depends on availability in the frequency spectrum. Assuming that UMTS has a downlink bandwidth of 70 MHz, for example, seven beacons are sufficient for secure information transfer during call setup.
  • a beacon consists of three adjacent subcarriers alpha, beta and gamma.
  • Alpha and gamma are used for frequency correction and are preferably modulated with a symbol pattern that corresponds to a constant rotation in the vector space. This constant rotation causes a constant frequency shift.
  • the symbol patterns are chosen in the exemplary embodiment such that alpha involves a constant frequency shift in the direction of a lower frequency, while gamma includes a constant frequency shift in the direction of a higher frequency.
  • Other variants of frequency correction based on alpha and gamma are conceivable, for example, suitable differential methods that represent a frequency correction by subtraction between alpha and gamma.
  • beta includes information about the bandwidth of the radio control channel BCCH as well as information about the frame structure. The bandwidth of the BCCH is encoded by repeatedly transmitted bit patterns of a certain length.
  • the bit pattern transmitted on beta has the length 2 and consists of the symbols Bl and B2.
  • the repetition of this two-sequence code exemplifies a system bandwidth of 2.5 MHz.
  • Other bit patterns are possible, for example a 3-bit bit pattern could encode the 5 MHz system bandwidth and a 1-bit bit pattern the smallest available system bandwidth.
  • Beta may also include information on the remaining bandwidth of the system.
  • a bandwidth of the BCCH which corresponds to half the maximum system bandwidth is advantageous, since in this case the bandwidth of the BCCH and the residual bandwidth correspond. This allows the use of the same information structures for both the BCCH and the payload.
  • the beacons are sent constantly, without any performance adjustments or time interruptions.
  • the position of the beacons in the frequency band is known.
  • a mobile terminal searches for the permanently transmitted subcarriers alpha and gamma. This search is made easier by the fact that the symbols sent via alpha and gamma have a typical pattern that corresponds to a constant frequency modulation. Furthermore, in the present exemplary embodiment, the mobile terminal is known in advance how large the frequency shift transmitted by alpha and gamma is and to which frequency this frequency shift relates. In this way, the frequency of a mobile terminal to be synchronized with the system frequency.
  • a mobile terminal in a second step of the method according to the invention for establishing a connection, can receive the permanently transmitted subcarrier beta and by using signal-matched filters and using the correct system code, the frame structure of the system and the current from BCCH used to detect bandwidth. Following this, the mobile terminal can use the received information to autonomously reconfigure itself with respect to the current bandwidth of the BCCH. Upon successful reconfiguration, the mobile terminal may receive the complete system information transmitted on the BCCH radio control channel.

Landscapes

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

Abstract

The invention relates to a method and a device for establishing a connection by means of mobile terminals in communication networks with variable bandwidths, said method and device enabling a more efficient establishment of a connection. A bundle of permanent send sub-carriers (beacons) is used to transmit basic system information. The beacons occupy predefined positions, which are therefore known to the mobile terminals, in the frequency band. According to the invention, said beacons can also be locally clustered in relation to the radio zone.

Description

Verfahren zum Verbindungsaufbau durch mobile Endgeräte in Kommunikationsnetzen mit variablen BandbreitenMethod for establishing a connection by mobile terminals in communication networks with variable bandwidths

Die vorliegende Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zum Verbindungsaufbau durch mobile Endgeräte in Kommunikationsnetzen mit variablen Bandbreiten gemäß den unabhängigen Ansprüchen 1 und 9.The present invention relates to a method and a device for connection establishment by mobile terminals in communication networks with variable bandwidths according to the independent claims 1 and 9.

Die dritte Generation der Mobilfunk-Kommunikationssysteme (abgekürzt 3G) stellt eine Vielzahl von Diensten zur Verfügung, unter anderem Dienste zur Übertragung von Sprachdaten (Telefongespräch) und Dienste zur Übertragung von andersartigen Mediadaten (E-Mail, Datendownloads, Instant Messaging, Videotelefonie) . Die im bisherigen 3G-Standard festgelegte Systembandbreite beträgt 5Mhz . Die nächste Entwicklungsstufe von 3G, die derzeit vom „3rd Generation Partnership Project" (3GPP) diskutiert wird, unterstützt unterschiedliche Systembandbreiten. Für das „Universal Mobile Telecommunications System" (UMTS) wurde die Funkzugangstechnologie „UMTS Ter- restrial Radio Access" (UTRA) entwickelt und von 3GPP spezifiziert. UTRA bietet variable Systembandbreiten von 1.25, 2.5, 5, 10, 15 und 20 MHz. Es ist es ein vorrangiges Ziel, die Zugriffs- und Reaktionszeiten für alle Endgeräte möglichst gering zu halten. Die in diesem Zusammenhang wichtigen Funkkontrollkanäle dienen der Übertragung netzwerkspezifischer Parameter wie zum Beispiel physikalischer Informationen zum Aufsynchronisieren oder zellspezifischen Daten, die in Downlink-Richtung von der Basisstation zu den mobilen Endgeräten hin gesendet werden.The third generation of mobile communication systems (3G for short) provides a variety of services, including voice data transmission (telephone conversation) and other media data transmission services (e-mail, data downloads, instant messaging, video telephony). The system bandwidth set in the previous 3G standard is 5Mhz. The next development stage of 3G, currently under discussion by the 3rd Generation Partnership Project (3GPP), supports different system bandwidths and the Universal Mobile Telecommunications System (UMTS) has introduced UMTS Terrestrial Radio Access (UTRA) radio access technology. UTRA offers variable system bandwidths of 1.25, 2.5, 5, 10, 15, and 20 MHz and it is a primary goal to keep access and response times as low as possible for all devices, the most important of which are radio control channels serve the transmission of network-specific parameters such as physical information for synchronization or cell-specific data sent in the downlink direction from the base station to the mobile terminals out.

In konventionellen Systemen wie GSM oder WCDMA ist die Systembandbreite fest und damit von vornherein bekannt, ebenso die unteren und oberen Grenzen des verwendeten Frequenzbandes. Bezüglich GSM ist den mobilen Endgeräten zum Beispiel bekannt, dass das verwendete Frequenzband den Bereich von 890 bis 915 MHz abdeckt bei einem 200 kHz breiten Trägerraster. Diese Informationen können die mobilen Endgeräte für den Verbindungsaufbau nutzen und sich auf diese Weise sehr schnell auf den entsprechenden Funkkontrollkanal (Broadcast Control Channel, kurz BCCH) aufsynchronisieren.In conventional systems such as GSM or WCDMA, the system bandwidth is fixed and thus known from the outset, as well as the lower and upper limits of the frequency band used. With respect to GSM, for example, the mobile terminals are known to use the frequency band used covering the range of 890 to 915 MHz with a 200 kHz wide carrier grid. This information can be used by the mobile devices to connect and in this way very quickly to the corresponding radio control channel (Broadcast Control Channel, short BCCH).

In 3G-Mobilfunksystemen ergibt sich für die mobilen Endgeräte das Problem, zunächst die Bandbreite des Funkkontrollkanals BCCH zu ermitteln, auf dem die notwendigen Systeminformationen übertragen werden. Weiterhin müssen die mobilen Endgeräte sowohl die Systemfrequenz ermitteln, auf der die Basisstationen senden, als auch die aktuell verwendete Rahmenstruktur (Frame Timing) . Während in konventionellen System nur zwei dieser Parameter zu ermitteln sind (Systemfrequenz und Frame Timing) , müssen durch die variablen Systembandbreiten in 3G- Mobilfunksystemen drei Parameter ermittelt werden (Systemfrequenz, Frame Timing und aktuell verwendete Bandbreite) .In 3G mobile radio systems, the problem arises for the mobile terminals to firstly determine the bandwidth of the radio control channel BCCH, on which the necessary system information is transmitted. Furthermore, the mobile terminals must determine both the system frequency at which the base stations are transmitting and the currently used frame structure (frame timing). While only two of these parameters are to be determined in conventional systems (system frequency and frame timing), the variable system bandwidths in 3G mobile radio systems require three parameters to be determined (system frequency, frame timing and currently used bandwidth).

Aufgabe der Erfindung ist ein Verfahren, dass mobilen Endgeräten in 3G-Mobilfunk-Kommunikationssystemen mit variablen Systembandbreiten einen effizienten Verbindungsaufbau ermöglicht.The object of the invention is a method that allows mobile terminals in 3G mobile communication systems with variable system bandwidths an efficient connection setup.

Diese Aufgabe wird hinsichtlich des Verfahrens durch die Merkmale des Anspruchs 1 und hinsichtlich der Vorrichtung durch die Merkmale des Anspruchs 9 gelöst.This object is achieved in terms of the method by the features of claim 1 and in terms of the device by the features of claim 9.

In dem erfindungsgemäßen Verfahren zum Verbindungsaufbau durch mobile Endgeräte in Kommunikationsnetzen mit variablen Bandbreiten kommuniziert eine Basisstation unter Verwendung einer bestimmten Systemfrequenz sowie einer bestimmten Bandbreite kleiner oder gleich der maximalen Systembandbreite und einer bestimmten Rahmenstruktur über einen Funkkontrollkanal mit mobilen Endgeräten. Es werden über den Funkkontrollkanal netzwerkspezifische Systeminformationen von der Basisstation zu den mobilen Endgeräten übertragen. Weiterhin werden eine oder mehrere Mengen von permanent gesendeten Subträgern Al- pha, Beta, Gamma zuvor festgelegter Frequenz, zusammengefasst zu mindestens einem sogenannten Beacon, zur Übertragung von Frequenzkorrekturinformationen, genutzter Bandbreite und verwendeter Rahmenstruktur von der Basisstation zu den mobilen Endgeräten verwendet, wobei zumindest ein erster und zumindest ein zweiter der permanent gesendeten Subträger Alpha und Gamma zur Frequenzkorrektur verwendet werden, und wobei auf zumindest einem dritten der permanent gesendeten Subträger Beta Informationen zur aktuell vom Funkkontrollkanal BCCH verwendeten Bandbreite und zur verwendeten Rahmenstruktur ü- bertragen werden. Die permanent gesendeten Subträger Alpha und Gamma werden von einem mobilen Endgerät in einem ersten Schritt des Verbindungsaufbaus zur Synchronisation der vom mobilen Endgerät genutzten Frequenz mit der verwendeten Systemfrequenz genutzt. In einem weiteren Schritt verwendet das mobile Endgerät nach erfolgter Synchronisation der Frequenz des mobilen Endgeräts mit der Systemfrequenz die auf dem permanent gesendeten Subträger Beta übertragenen Informationen zur aktuell vom Funkkontrollkanal BCCH verwendeten Bandbreite und zur verwendeten Rahmenstruktur zur Rekonfiguration. Nach erfolgter Rekonfiguration des mobilen Endgeräts werden die über den Funkkontrollkanal übertragenen Systeminformationen zum vollständigen Verbindungsaufbau verwendet.In the inventive method for establishing a connection by mobile terminals in communication networks with variable bandwidths, a base station communicates using a certain system frequency and a certain bandwidth less than or equal to the maximum system bandwidth and a specific frame structure via a radio control channel with mobile terminals. Network-specific system information is transmitted from the base station to the mobile terminals via the radio control channel. Furthermore, one or more sets of permanently transmitted sub-carriers alpha, beta, gamma of predetermined frequency are combined to form at least one so-called beacon for transmission of frequency correction information, bandwidth used and frame structure used from the base station to the mobile At least one first and at least one second of the permanently transmitted subcarriers alpha and gamma are used for frequency correction, and at least one third of the permanently transmitted subcarriers beta transmits information about the bandwidth currently being used by the radio control channel BCCH and the frame structure used , The permanently transmitted subcarriers alpha and gamma are used by a mobile terminal in a first step of establishing a connection to synchronize the frequency used by the mobile terminal with the system frequency used. In a further step, after synchronization of the frequency of the mobile terminal with the system frequency, the mobile terminal uses the information transmitted on the permanently transmitted subcarrier beta for the bandwidth currently being used by the radio control channel BCCH and for the frame structure used for the reconfiguration. After the mobile terminal has been reconfigured, the system information transmitted via the radio control channel is used for the complete establishment of the connection.

Weiterhin umfasst die Erfindung eine Vorrichtung mit Mitteln zur Durchführung des oben dargestellten Verfahrens .Furthermore, the invention comprises a device with means for carrying out the method presented above.

Die vorliegende Erfindung hat den Vorteil, dass mobilen End- geraten in Kommunikationsnetzen mit variablen Bandbreiten ein effizienter Verbindungsaufbau ermöglicht wird, in dem ein Verfahren, basierend auf zwei Schritten, eingeführt wird. Anstatt zum Beispiel die mobilen Endgeräte alle im System möglichen Bandbreiten durchprobieren zu lassen, bis die aktuell verwendete Systembandbreite gefunden ist, werden Mengen von permanent gesendeten benachbarten Subträgern, englisch Bea- cons, verwendet, um die grundlegenden Systeminformationen zu übertragen. Die Beacons haben zuvor festgelegte und damit den mobilen Endgeräten bekannte Positionen im Frequenzband, wobei diese Positionen bezogen auf die Funkzellen auch örtlich gec- lustert sein können. Die erfindungsgemäße Codierung und Struktur der Subträger erlauben eine gleichzeitige Abschätzung z.B. der genauen Frequenz, der Rahmenstruktur sowie wei- terer systemspezifischer Informationen wie der Bandbreite des gesendeten Funkkontrollkanals BCCH. Diese Information wird durch den mobilen Endgeräten bekannte Code-Sets zeitlich gespreizt. Mobile Endgeräte mit „Multiple Input, Multiple Out- put" (MIMO) -Fähigkeit können gleichzeitig verschiedene Bea- con-Positionen nutzen und so durch Parallel-Empfang die Empfangsqualität steigern. Gleichzeitig wird so ein schnellerer und effizienterer Verbindungsaufbau ermöglicht. Ein weiterer MIMO-bedingter Vorteil ist die Auswertung des Dopplershifts und damit zusammenhängender Frequenzverschiebungen, die eine Optimierung der Funkverbindung ermöglichen.The present invention has the advantage that mobile terminals in variable bandwidth communication networks are enabled to establish an efficient connection by introducing a two-step method. For example, instead of letting the mobile terminals test all the bandwidths possible in the system until the currently used system bandwidth is found, sets of permanently transmitted adjacent subcarriers, English Beacons, are used to transmit the basic system information. The beacons have previously defined positions in the frequency band, which are known to the mobile terminals, and these positions may also be locally separated relative to the radio cells. The coding and structure of the subcarriers according to the invention allow a simultaneous estimation, for example, of the exact frequency, the frame structure, and further of system-specific information such as the bandwidth of the transmitted radio control channel BCCH. This information is spread in time by the mobile terminal known code sets. Mobile devices with "Multiple Input, Multiple Output" (MIMO) capability can simultaneously use different beacon positions, increasing reception quality through parallel reception, while enabling faster and more efficient call origination. a conditional advantage is the evaluation of the Doppler shift and related frequency shifts, which allow an optimization of the radio link.

Vorteilhafte Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen angegeben.Advantageous developments of the invention are specified in the dependent claims.

In einer weiteren vorteilhaften Ausprägung der Erfindung wird die Frequenzkorrektur, basierend auf dem ersten und dem zweiten permanent gesendeten Subträger Alpha und Gamma, mit Hilfe eines Differenzverfahrens durchgeführt.In a further advantageous embodiment of the invention, the frequency correction, based on the first and second permanently transmitted subcarriers alpha and gamma, is performed by means of a difference method.

In einer weiteren vorteilhaften Ausprägung der Erfindung wird der erste permanent gesendete Subträger Alpha zur Frequenzkorrektur in Richtung einer niedrigeren Frequenz und der zweite permanent gesendete Subträger Gamma zur Frequenzkor- rektur in Richtung einer höheren Frequenz genutzt.In a further advantageous embodiment of the invention, the first permanently transmitted subcarrier Alpha is used for frequency correction in the direction of a lower frequency and the second permanently transmitted subcarrier gamma is used for frequency correction in the direction of a higher frequency.

In einer weiteren vorteilhaften Ausprägung der Erfindung erfolgt die Übertragung der Bandbreite des Funkkontrollkanals BCCH auf dem dritten permanent gesendeten Subträger Beta durch eine geeignete Codierung in Form von zeitlich wiederholt übertragenen Symbolsequenzen.In a further advantageous embodiment of the invention, the transmission of the bandwidth of the radio control channel BCCH takes place on the third permanently transmitted subcarrier beta by a suitable coding in the form of temporally repeatedly transmitted symbol sequences.

In einer weiteren vorteilhaften Ausprägung der Erfindung erlauben die auf Beta übertragenen Symbole des Bitmusters in Kombination mit den auf den Beta umgebenden Subträgern übertragenen Symbolen eine genauere Identifizierung des für die Übertragung des BCCH verwendeten Codes . In einer weiteren vorteilhaften Ausprägung der Erfindung kann die Ausstrahlung der Beacons räumlich getrennt voneinander erfolgen, um Interferenzen zwischen benachbarten Zellen zu vermeiden.In a further advantageous embodiment of the invention, the symbols of the bit pattern transmitted in beta in combination with the symbols transmitted to the beta allow a more accurate identification of the code used for the transmission of the BCCH. In a further advantageous embodiment of the invention, the radiation of the beacons can be spatially separated from one another in order to avoid interference between adjacent cells.

In einer weiteren vorteilhaften Ausprägung der Erfindung kann zur Steigerung der Empfangssensitivität eine Verschlüsselung der übertragenen Bits vorgenommen werden, vorzugsweise durch 16 Bit lange Walsh-Codes. Dies entspricht einer Spreizung der Information in der Zeit.In a further advantageous embodiment of the invention, an encryption of the transmitted bits can be carried out to increase the reception sensitivity, preferably by 16-bit Walsh codes. This corresponds to a spreading of the information in time.

In einer weiteren vorteilhaften Ausprägung der Erfindung wird über die Beacons ein bestimmter Netzwerk-Code gesendet, der es im Fall von „Neighbour cell monitoring" ermöglicht zu ü- berprüfen, ob der Betrieb eines mobilen Endgeräts in dem betreffenden Frequenzband erlaubt ist.In a further advantageous embodiment of the invention, a specific network code is sent via the beacons, which in the case of "neighbor cell monitoring" makes it possible to check whether the operation of a mobile terminal in the relevant frequency band is permitted.

Im folgenden wird die Erfindung anhand eines Ausführungsbeispiels und mit Bezug auf die beigefügte Zeichnung veranschau- licht. Dabei zeigt:In the following the invention with reference to an embodiment and with reference to the accompanying drawings illustrated. Showing:

Fig. 1: die Anordnung der Subträger Alpha, Beta und Gamma sowie des Funkkontrollkanals BCCHFig. 1: the arrangement of the subcarrier alpha, beta and gamma and the radio control channel BCCH

Figur 1 stellt die erfindungsgemäße zeitliche und frequenzbezogene Anordnung der Subträger Alpha, Beta und Gamma sowie des Funkkontrollkanals BCCH dar. Erfindungsgemäß werden die Subträger Alpha, Beta und Gamma sowie der Funkkontrollkanal BCCH in Form von einzelnen Funkkanälen, vorzugsweise OFDM- Funkkanälen, aufgebaut. Die vorliegende Erfindung lässt sich jedoch auch auf andere Systeme anwenden. Im vorliegenden Ausführungsbeispiel befindet sich der Subträger Beta zwischen den Subträgern Alpha und Gamma. Andere Varianten der Anordnung der Subträger sind denkbar. Für den Verbindungsaufbau in einem Mobilfunk-Kommunikationsnetz muss ein mobiles Endgerät eine initiale Zellsuche durchführen. Für einen erfolgreichen Verbindungsaufbau benötigt das mobile Endgerät Informationen über die aktuelle Bandbreite des Funkkontrollkanals BCCH, die kleiner oder gleich der Systembandbreite sein kann, Informationen zur Systemfrequenz und zur verwendeten Rahmenstruktur. Aufgrund der variablen Systembandbreite in 3G-Funknetzen ist eine Vielzahl von Systembandbreiten möglich. Die möglichen Systembandbreiten sind dem mobilen Endgerät bekannt, jedoch nicht die aktuell verwendete Bandbreite des Funkkontrollkanals BCCH. Das erfindungsgemäße Verfahren besteht aus zwei Schritten, die im folgenden erläutert werden. Das erfindungsgemäße Verfahren basiert auf dem Konzept der permanent gesen- deten Subträger, englisch Beacons, die die für einen Verbindungsaufbau notwendigen Systeminformationen konstant übertragen. Vorzugsweise kann zu diesem Zweck der OFDM-Downlink verwendet werden. OFDM-Übertragungen geschehen mithilfe einer Menge von Subträgern. Der typische Abstand zwischen zwei Sub- trägem beträgt dabei 20 bis 40 kHz. Ein Beacon setzt sich aus mehreren benachbarten solcher Subträger zusammen. Die in Figur 1 dargestellte Ausprägung der Erfindung verwendet drei Subträger. Die Positionen der Beacons im Frequenzband ist standardmäßig festgelegt. Die Anzahl der verwendeten Beacons stellt einen Kompromiss aus möglicher Spektralkapazität und Overhead sowie annehmbarem Zeitbedarf hinsichtlich des Verbindungsaufbaus dar. Die Anzahl und die Positionen der Beacons hängt weiterhin von der Verfügbarkeit im Frequenzspektrum ab. Unter der Annahme, dass UMTS eine Downlink-Bandbreite von 70 MHz aufweist, sind beispielsweise sieben Beacons ausreichend für eine sichere Informationsübertragung während des Verbindungsaufbaus . In der in Figur 1 dargestellten Ausprägung der Erfindung besteht ein Beacon aus drei adjazenten Subträgern Alpha, Beta und Gamma. Alpha und Gamma dienen zur Frequenzkorrektur und werden vorzugsweise mit einem Symbolmuster moduliert, dass einer konstanten Rotation im Vektorraum entspricht. Diese konstante Rotation bewirkt eine konstante Frequenzverschiebung. Die Symbolmuster werden im Ausführungsbeispiel so gewählt, dass Alpha eine konstante Fre- quenzverschiebung in Richtung einer niedrigeren Frequenz beinhaltet, während Gamma eine konstante Frequenzverschiebung in Richtung einer höheren Frequenz beinhaltet. Andere Varianten der Frequenzkorrektur auf der Basis von Alpha und Gamma sind denkbar, zum Beispiel geeignete Differenzverfahren, die eine Frequenzkorrektur durch Differenzbildung zwischen Alpha und Gamma darstellen. Beta beinhaltet im Ausführungsbeispiel Informationen zur Bandbreite des Funkkontrollkanals BCCH so- wie Informationen zur Rahmenstruktur. Die Bandbreite des BCCH wird durch wiederholt gesendete Bitmuster bestimmter Länge codiert. Dies entspricht einer Codierung der Bandbreiteninformation in der Zeit. In Figur 1 hat das auf Beta gesendete Bitmuster die Länge 2 und besteht aus den Symbolen Bl und B2. Die Wiederholung dieser Zweiersequenz codiert beispielhaft eine Systembandbreite von 2.5 MHz. Andere Bitmuster sind möglich, zum Beispiel könnte ein Bitmuster der Länge 3 die Systembandbreite 5 MHz codieren und ein Bitmuster der Länge 1 die kleinste verfügbare Systembandbreite. Für den Fall, dass die Bandbreite des BCCH kleiner ist als die maximale Systembandbreite, kann Beta auch Informationen zur Restbandbreite des Systems beinhalten. Vorteilhaft ist eine Bandbreite des BCCH, die der halben maximalen Systembandbreite entspricht, da sich in diesem Fall die Bandbreite des BCCH und die Rest- bandbreite entsprechen. Dies erlaubt die Verwendung gleicher Informationsstrukturen sowohl für den BCCH als auch für die Nutzdaten.FIG. 1 illustrates the temporal and frequency-related arrangement of the subcarriers alpha, beta and gamma as well as the radio control channel BCCH according to the invention. According to the invention, the subcarriers alpha, beta and gamma and the radio control channel BCCH are constructed in the form of individual radio channels, preferably OFDM radio channels. However, the present invention can also be applied to other systems. In the present embodiment, the subcarrier beta is located between the subcarriers alpha and gamma. Other variants of the arrangement of subcarriers are conceivable. For establishing a connection in a mobile radio communication network, a mobile terminal must perform an initial cell search. For a successful connection, the mobile terminal needs information about the current bandwidth of the radio control channel BCCH, the may be less than or equal to the system bandwidth, information about the system frequency and the frame structure used. Due to the variable system bandwidth in 3G wireless networks, a variety of system bandwidths is possible. The possible system bandwidths are known to the mobile terminal, but not the currently used bandwidth of the radio control channel BCCH. The inventive method consists of two steps, which are explained below. The method according to the invention is based on the concept of permanently transmitted subcarriers, English beacons, which constantly transmit the system information necessary for establishing a connection. Preferably, the OFDM downlink may be used for this purpose. OFDM transfers are done using a set of subcarriers. The typical distance between two sub-carriers is 20 to 40 kHz. A beacon is composed of several adjacent such subcarriers. The embodiment of the invention shown in FIG. 1 uses three subcarriers. The positions of the beacons in the frequency band are set by default. The number of beacons used is a compromise of possible spectral capacity and overhead, as well as acceptable connection setup time requirements. The number and locations of the beacons also depends on availability in the frequency spectrum. Assuming that UMTS has a downlink bandwidth of 70 MHz, for example, seven beacons are sufficient for secure information transfer during call setup. In the embodiment of the invention shown in FIG. 1, a beacon consists of three adjacent subcarriers alpha, beta and gamma. Alpha and gamma are used for frequency correction and are preferably modulated with a symbol pattern that corresponds to a constant rotation in the vector space. This constant rotation causes a constant frequency shift. The symbol patterns are chosen in the exemplary embodiment such that alpha involves a constant frequency shift in the direction of a lower frequency, while gamma includes a constant frequency shift in the direction of a higher frequency. Other variants of frequency correction based on alpha and gamma are conceivable, for example, suitable differential methods that represent a frequency correction by subtraction between alpha and gamma. In the exemplary embodiment, beta includes information about the bandwidth of the radio control channel BCCH as well as information about the frame structure. The bandwidth of the BCCH is encoded by repeatedly transmitted bit patterns of a certain length. This corresponds to encoding the bandwidth information in time. In FIG. 1, the bit pattern transmitted on beta has the length 2 and consists of the symbols Bl and B2. The repetition of this two-sequence code exemplifies a system bandwidth of 2.5 MHz. Other bit patterns are possible, for example a 3-bit bit pattern could encode the 5 MHz system bandwidth and a 1-bit bit pattern the smallest available system bandwidth. In the event that the bandwidth of the BCCH is less than the maximum system bandwidth, Beta may also include information on the remaining bandwidth of the system. A bandwidth of the BCCH which corresponds to half the maximum system bandwidth is advantageous, since in this case the bandwidth of the BCCH and the residual bandwidth correspond. This allows the use of the same information structures for both the BCCH and the payload.

Unabhängig vom verwendeten Sendeschema (vorzugsweise TDM, FDM oder OFDMA) werden die Beacons konstant gesendet, ohne dabei Leistungsanpassungen oder zeitliche Unterbrechungen vorzunehmen. Erfindungsgemäß ist den mobilen Endgeräten die Position der Beacons im Frequenzband bekannt.Regardless of the transmission scheme used (preferably TDM, FDM or OFDMA), the beacons are sent constantly, without any performance adjustments or time interruptions. According to the mobile devices, the position of the beacons in the frequency band is known.

In einem ersten Schritt des erfindungsgemäßen Verfahrens zum Verbindungsaufbau sucht ein mobiles Endgerät nach den permanent gesendeten Subträgern Alpha und Gamma. Diese Suche wird dadurch vereinfacht, dass die über Alpha und Gamma gesendeten Symbole ein typisches Muster aufweisen, das einer konstanten Frequenzmodulation entspricht. Weiterhin ist den mobilen End- geraten im vorliegenden Ausführungsbeispiel im Voraus bekannt, wie groß die von Alpha und Gamma übertragene Frequenzverschiebung ist und auf welche Frequenz sich diese Frequenzverschiebung bezieht. Auf diese Weise kann die Frequenz eines mobilen Endgeräts mit der Systemfrequenz synchronisiert werden.In a first step of the method according to the invention for establishing a connection, a mobile terminal searches for the permanently transmitted subcarriers alpha and gamma. This search is made easier by the fact that the symbols sent via alpha and gamma have a typical pattern that corresponds to a constant frequency modulation. Furthermore, in the present exemplary embodiment, the mobile terminal is known in advance how large the frequency shift transmitted by alpha and gamma is and to which frequency this frequency shift relates. In this way, the frequency of a mobile terminal to be synchronized with the system frequency.

In einem zweiten Schritt des erfindungsgemäßen Verfahrens zum Verbindungsaufbau kann ein mobiles Endgerät nach erfolgrei- eher Synchronisation mit der Systemfrequenz den permanent ü- bertragenen Subträger Beta empfangen und durch Anwendung sig- nalangepasster Filter sowie unter Verwendung des korrekten Systemcodes die Rahmenstruktur des Systems sowie die aktuell vom BCCH verwendete Bandbreite ermitteln. Im Anschluss daran kann das mobile Endgerät die empfangenen Informationen verwenden, um sich selbständig hinsichtlich der aktuellen Bandbreite des BCCH zu rekonfigurieren. Nach erfolgreicher Rekon- figuration kann das mobile Endgerät die vollständigen Systeminformationen empfangen, die auf dem Funkkontrollkanal BCCH gesendet werden. In a second step of the method according to the invention for establishing a connection, a mobile terminal, after successful synchronization with the system frequency, can receive the permanently transmitted subcarrier beta and by using signal-matched filters and using the correct system code, the frame structure of the system and the current from BCCH used to detect bandwidth. Following this, the mobile terminal can use the received information to autonomously reconfigure itself with respect to the current bandwidth of the BCCH. Upon successful reconfiguration, the mobile terminal may receive the complete system information transmitted on the BCCH radio control channel.

Claims

Patentansprücheclaims 1) Verfahren zum Verbindungsaufbau durch mobile Endgeräte in Kommunikationsnetzen mit variablen Bandbreiten, a. bei dem eine Basisstation unter Verwendung einer bestimmten Systemfrequenz sowie einer bestimmten Bandbreite kleiner oder gleich der maximalen Systembandbreite und einer bestimmten Rahmenstruktur über einen Funkkontrollkanal (BCCH) mit mobilen Endgeräten kommuniziert, b. bei dem über den Funkkontrollkanal (BCCH), der eine Bandbreite kleiner oder gleich der maximalen Systembandbreite aufweist, netzwerkspezifische Systeminformationen von der Basisstation zu den mobilen Endgeräten übertragen werden, c. bei dem eine oder mehrere Mengen von permanent gesendeten Subträgern (Alpha, Beta, Gamma) zuvor festgelegter Frequenz, zusammengefasst zu mindestens einem sogenannten Beacon, zur Übertragung von Frequenzkorrekturinformationen, Bandbreite des1) Method for connection establishment by mobile terminals in communication networks with variable bandwidths, a. wherein a base station communicates with mobile terminals via a radio control channel (BCCH) using a particular system frequency and a certain bandwidth less than or equal to the maximum system bandwidth and a particular frame structure, b. wherein network-specific system information is transmitted from the base station to the mobile terminals via the radio control channel (BCCH) having a bandwidth equal to or less than the maximum system bandwidth, c. in which one or more sets of permanently transmitted subcarriers (alpha, beta, gamma) of predetermined frequency, combined to at least one so-called beacon, for transmitting frequency correction information, bandwidth of the Funkkontrollkanals (BCCH) und verwendeter Rahmenstruktur von der Basisstation zu den mobilen Endgeräten verwendet werden, wobei zumindest ein erster und zumindest ein zweiter der permanent gesendeten Subträger (Alpha, Gamma) zur Frequenzkorrektur verwendet werden, und wobei auf zumindest einem dritten der permanent gesendeten Subträger (Beta) Informationen zur aktuell vom Funkkontrollkanal (BCCH) verwendeten Bandbreite und zur verwendeten Rahmenstruktur übertragen werden, d. bei dem der erste und der zweite permanent gesendete Subträger (Alpha, Gamma) von einem mobilen Endgerät in einem ersten Schritt des Verbindungsaufbaus zur Synchronisation der vom mobilen Endgerät genutzten Frequenz mit der verwendeten Systemfrequenz genutzt werden, e. bei dem das mobile Endgerät in einem weiteren Schritt nach erfolgter Synchronisation der Frequenz des mobilen Endgeräts mit der Systemfrequenz die auf dem permanent gesendeten Subträger (Beta) übertragenen Informationen zur aktuell vom Funkkontrollkanal (BCCH) verwendeten Bandbreite und zur verwendeten Rahmenstruktur zur Rekonfiguration verwendet, und f. bei dem das mobile Endgerät nach erfolgter Rekonfi- guration die über den Funkkontrollkanal (BCCH) ü- bertragenen Systeminformationen für einen vollstän- digen Verbindungsaufbau verwendet.Radio control channel (BCCH) and frame structure used from the base station to the mobile terminals, wherein at least a first and at least a second of the permanently transmitted subcarriers (alpha, gamma) are used for frequency correction, and wherein on at least a third of the permanently transmitted subcarriers ( Beta) information about the current bandwidth used by the radio control channel (BCCH) and the frame structure used, d. in which the first and the second permanently transmitted subcarriers (alpha, gamma) are used by a mobile terminal in a first step of the connection setup to synchronize the frequency used by the mobile terminal with the system frequency used, e. in which the mobile terminal in a further step after synchronization of the frequency the system frequency mobile station uses the information transmitted on the permanently transmitted subcarrier (beta) for the bandwidth currently being used by the radio control channel (BCCH) and the frame structure used for the reconfiguration, and f. in which the mobile terminal, after reconfiguration, uses the system information transmitted via the radio control channel (BCCH) for a complete connection establishment. 2) Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Frequenzkorrektur, basierend auf dem ersten und dem zweiten permanent gesendeten Subträger (Alpha, Gamma) , mit Hilfe eines Differenzverfahrens geschieht.2) Method according to claim 1, characterized in that the frequency correction, based on the first and the second permanently transmitted subcarrier (alpha, gamma), is done by means of a difference method. 3) Verfahren nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der erste permanent gesendete Subträger (Alpha) zur Frequenzkorrektur in Richtung einer niedrigeren Frequenz und der zweite permanent gesendete Subträger (Gamma) zur Frequenzkorrektur in Richtung einer höheren Frequenz genutzt wird.3) Method according to one of the preceding claims, characterized in that the first permanently transmitted subcarrier (alpha) is used for frequency correction in the direction of a lower frequency and the second permanently transmitted subcarrier (gamma) for frequency correction in the direction of a higher frequency. 4) Verfahren nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Übertragung der Bandbreite des4) Method according to one of the preceding claims, characterized in that the transmission of the bandwidth of Funkkontrollkanals (BCCH) auf dem dritten permanent ü- bertragenen Subträger (Beta) durch eine geeignete Codierung in Form von zeitlich wiederholt übertragenen Symbolsequenzen erfolgt.Funkkontrollkanals (BCCH) on the third permanently Ü transmitted transmitted subcarrier (beta) by a suitable coding in the form of temporally repeatedly transmitted symbol sequences. 5) Verfahren nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die auf dem dritten permanent übertragenen Subträger (Beta) übertragenen Symbole zur Codierung der Bandbreite des Funkkontrollkanals (BCCH) in Kombination mit den auf den diesen dritten Subträger5) Method according to one of the preceding claims, characterized in that the on the third permanently transmitted subcarrier (beta) transmitted symbols for coding the bandwidth of the radio control channel (BCCH) in combination with the latter on this third subcarrier (Beta) umgebenden Subträgern (Alpha, Gamma) übertragenen Symbolen verwendet werden, um den für die Übertragung des Funkkontrollkanals (BCCH) verwendeten Code zu iden- tif izieren .(Beta) surrounding subcarriers (alpha, gamma) are used to identify the code used to transmit the radio control channel (BCCH). tify. 6) Verfahren nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Ausstrahlung mehrerer Beacons räumlich getrennt voneinander erfolgt.6) Method according to one of the preceding claims, characterized in that the radiation of several beacons is spatially separated from each other. 7) Verfahren nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das die in Form von Bits übertragenen Informationen mit 16 Bit langen Walsh-Codes ver- schlüsselt werden.7) Method according to one of the preceding claims, characterized in that the transmitted in the form of bits information with 16-bit Walsh codes are encrypted. 8) Verfahren nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass über einen Beacon ein bestimmter Netzwerk-Code gesendet wird, der es ermöglicht zu über- prüfen, ob der Betrieb eines mobilen Endgeräts in dem betreffenden Frequenzband erlaubt ist.8) Method according to one of the preceding claims, characterized in that a specific network code is sent via a beacon, which makes it possible to check whether the operation of a mobile terminal in the relevant frequency band is allowed. 9) Vorrichtung zum Verbindungsaufbau in Kommunikationsnetzen mit variablen Bandbreiten, a. mit Mitteln zur Kommunikation unter Verwendung einer bestimmten Systemfrequenz sowie einer bestimmten Bandbreite kleiner oder gleich der maximalen Systembandbreite und einer bestimmten Rahmenstruktur über einen Funkkontrollkanal (BCCH) , b. mit Mitteln zur Übertragung von netzwerkspezifische9) Device for connection establishment in communication networks with variable bandwidths, a. with means for communication using a certain system frequency and a certain bandwidth less than or equal to the maximum system bandwidth and a specific frame structure via a radio control channel (BCCH), b. with means for transmission of network-specific Systeminformationen über den Funkkontrollkanal (BCCH) , c. mit Mitteln zum permanenten Senden einer oder mehrerer Mengen von permanent gesendeten Subträgern (Alpha, Beta, Gamma) zuvor festgelegter Frequenz, zusammengefasst zu mindestens einem sogenannten Beacon, zur Übertragung von Frequenzkorrekturinformationen, Bandbreite des Funkkontrollkanals (BCCH) und verwendeter Rahmenstruktur, d. mit Mitteln zur Frequenzkorrektur durch Verwendung zumindest eines ersten und zumindest eines zweiten der permanent gesendeten Subträger (Alpha, Gamma) , e. mit Mitteln zur Übertragung von Informationen zur aktuell vom Funkkontrollkanal (BCCH) verwendeten Bandbreite sowie zur verwendeten Rahmenstruktur auf zumindest einem dritten der permanent gesendeten Subträger (Beta) , f. mit Mitteln zu einem ersten Schritt des Verbindungsaufbaus durch Verwendung der auf den permanent gesendeten Subträgern (Alpha, Gamma) übertragenen Informationen zur Frequenzkorrektur zur Frequenz- Synchronisation, g. mit Mitteln zur Rekonfiguration durch Nutzung der auf dem dritten permanent gesendeten Subträger (Beta) übertragenen Informationen zur aktuell vom Funkkontrollkanal (BCCH) verwendeten Bandbreite und zur verwendeten Rahmenstruktur, und h. mit Mitteln zur Verwendung der über den Funkkontrollkanal (BCCH) übertragenen Systeminformationen für einen vollständigen Verbindungsaufbau.System information via the radio control channel (BCCH), c. means for permanently transmitting one or more sets of permanently transmitted subcarriers (alpha, beta, gamma) of predetermined frequency, aggregated to at least one so-called beacon, for transmitting frequency correction information, bandwidth of the radio control channel (BCCH) and frame structure used, d. with frequency correction means by using at least a first and at least a second of the permanently transmitted subcarriers (alpha, gamma), e. with means for transmitting information on the bandwidth currently being used by the radio control channel (BCCH) and on the frame structure used on at least a third of the permanently transmitted sub-carriers (beta), f. means for a first step of establishing a connection by using the information transmitted to the permanently transmitted subcarriers (alpha, gamma) for frequency correction for frequency synchronization, g. with means for reconfiguration by using the information transmitted on the third permanently transmitted subcarrier (beta) information on the current bandwidth used by the radio control channel (BCCH) and the frame structure used, and h. with means for using the system information transmitted over the radio control channel (BCCH) for complete connection establishment. 10) Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass es sich bei der Vorrichtung um eine Basisstation handelt .10) Device according to claim 5, characterized in that it is a base station in the device. 11) Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass es sich bei der Vorrichtung um ein mobiles Endgerät handelt . 11) Apparatus according to claim 5, characterized in that it is the device is a mobile terminal.
PCT/EP2006/062791 2005-06-17 2006-05-31 Method for establishing a connection by means of mobile terminals in communication networks with variable bandwidths Ceased WO2006134032A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510028179 DE102005028179A1 (en) 2005-06-17 2005-06-17 Method for establishing a connection by mobile terminals in communication networks with variable bandwidths
DE102005028179.6 2005-06-17

Publications (1)

Publication Number Publication Date
WO2006134032A1 true WO2006134032A1 (en) 2006-12-21

Family

ID=36838669

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/062791 Ceased WO2006134032A1 (en) 2005-06-17 2006-05-31 Method for establishing a connection by means of mobile terminals in communication networks with variable bandwidths

Country Status (2)

Country Link
DE (1) DE102005028179A1 (en)
WO (1) WO2006134032A1 (en)

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007051182A1 (en) * 2005-10-27 2007-05-03 Qualcomm Incorporated A method and apparatus for bootstraping information in a communication system
WO2009064531A3 (en) * 2007-11-15 2009-07-02 Qualcomm Inc Beacon-based control channels
WO2009099841A2 (en) 2008-02-01 2009-08-13 Qualcomm Incorporated Method and apparatus for facilitating concatenated codes for beacon channels
WO2009053816A3 (en) * 2007-10-22 2009-08-13 Nokia Corp Digital broadcast signaling metadata
US8045512B2 (en) 2005-10-27 2011-10-25 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
US8098568B2 (en) 2000-09-13 2012-01-17 Qualcomm Incorporated Signaling method in an OFDM multiple access system
US8446892B2 (en) 2005-03-16 2013-05-21 Qualcomm Incorporated Channel structures for a quasi-orthogonal multiple-access communication system
US8462859B2 (en) 2005-06-01 2013-06-11 Qualcomm Incorporated Sphere decoding apparatus
US8477684B2 (en) 2005-10-27 2013-07-02 Qualcomm Incorporated Acknowledgement of control messages in a wireless communication system
US8565194B2 (en) 2005-10-27 2013-10-22 Qualcomm Incorporated Puncturing signaling channel for a wireless communication system
US8582509B2 (en) 2005-10-27 2013-11-12 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
US8582548B2 (en) 2005-11-18 2013-11-12 Qualcomm Incorporated Frequency division multiple access schemes for wireless communication
US8599945B2 (en) 2005-06-16 2013-12-03 Qualcomm Incorporated Robust rank prediction for a MIMO system
US8611284B2 (en) 2005-05-31 2013-12-17 Qualcomm Incorporated Use of supplemental assignments to decrement resources
US8644292B2 (en) 2005-08-24 2014-02-04 Qualcomm Incorporated Varied transmission time intervals for wireless communication system
US8675537B2 (en) 2008-04-07 2014-03-18 Qualcomm Incorporated Method and apparatus for using MBSFN subframes to send unicast information
US8693405B2 (en) 2005-10-27 2014-04-08 Qualcomm Incorporated SDMA resource management
US8761032B2 (en) 2007-11-16 2014-06-24 Qualcomm Incorporated Random reuse based control channels
US8879511B2 (en) 2005-10-27 2014-11-04 Qualcomm Incorporated Assignment acknowledgement for a wireless communication system
US8885628B2 (en) 2005-08-08 2014-11-11 Qualcomm Incorporated Code division multiplexing in a single-carrier frequency division multiple access system
US8917654B2 (en) 2005-04-19 2014-12-23 Qualcomm Incorporated Frequency hopping design for single carrier FDMA systems
US9088384B2 (en) 2005-10-27 2015-07-21 Qualcomm Incorporated Pilot symbol transmission in wireless communication systems
US9107239B2 (en) 2008-04-07 2015-08-11 Qualcomm Incorporated Systems and methods to define control channels using reserved resource blocks
US9130810B2 (en) 2000-09-13 2015-09-08 Qualcomm Incorporated OFDM communications methods and apparatus
US9136974B2 (en) 2005-08-30 2015-09-15 Qualcomm Incorporated Precoding and SDMA support
US9137822B2 (en) 2004-07-21 2015-09-15 Qualcomm Incorporated Efficient signaling over access channel
US9143305B2 (en) 2005-03-17 2015-09-22 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9144060B2 (en) 2005-10-27 2015-09-22 Qualcomm Incorporated Resource allocation for shared signaling channels
US9148256B2 (en) 2004-07-21 2015-09-29 Qualcomm Incorporated Performance based rank prediction for MIMO design
US9154211B2 (en) 2005-03-11 2015-10-06 Qualcomm Incorporated Systems and methods for beamforming feedback in multi antenna communication systems
US9172453B2 (en) 2005-10-27 2015-10-27 Qualcomm Incorporated Method and apparatus for pre-coding frequency division duplexing system
US9179319B2 (en) 2005-06-16 2015-11-03 Qualcomm Incorporated Adaptive sectorization in cellular systems
US9184870B2 (en) 2005-04-01 2015-11-10 Qualcomm Incorporated Systems and methods for control channel signaling
US9209956B2 (en) 2005-08-22 2015-12-08 Qualcomm Incorporated Segment sensitive scheduling
US9225416B2 (en) 2005-10-27 2015-12-29 Qualcomm Incorporated Varied signaling channels for a reverse link in a wireless communication system
US9225488B2 (en) 2005-10-27 2015-12-29 Qualcomm Incorporated Shared signaling channel
US9246560B2 (en) 2005-03-10 2016-01-26 Qualcomm Incorporated Systems and methods for beamforming and rate control in a multi-input multi-output communication systems
US9307544B2 (en) 2005-04-19 2016-04-05 Qualcomm Incorporated Channel quality reporting for adaptive sectorization
US9326253B2 (en) 2007-11-15 2016-04-26 Qualcomm Incorporated Wireless communication channel blanking
US9461859B2 (en) 2005-03-17 2016-10-04 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9520972B2 (en) 2005-03-17 2016-12-13 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9660776B2 (en) 2005-08-22 2017-05-23 Qualcomm Incorporated Method and apparatus for providing antenna diversity in a wireless communication system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1061705A1 (en) * 1999-06-16 2000-12-20 Sony International (Europe) GmbH Optimized synchronization preamble structure for OFDM system
DE19957288C1 (en) * 1999-11-29 2001-05-10 Siemens Ag Channel structure signalling in radio communications system
US20050075125A1 (en) * 2002-01-21 2005-04-07 Bada Anna Marina Method and mobile station to perform the initial cell search in time slotted systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1061705A1 (en) * 1999-06-16 2000-12-20 Sony International (Europe) GmbH Optimized synchronization preamble structure for OFDM system
DE19957288C1 (en) * 1999-11-29 2001-05-10 Siemens Ag Channel structure signalling in radio communications system
US20050075125A1 (en) * 2002-01-21 2005-04-07 Bada Anna Marina Method and mobile station to perform the initial cell search in time slotted systems

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MOTOROLA: "Considerations on the preamble A-field for BCCH", ETSI EP BRAN#13, TEMPORARY DOCUMENT HL13MOT1A, 7 April 1999 (1999-04-07), Stockholm, SE, pages 1 - 4, XP002396362 *

Cited By (72)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9426012B2 (en) 2000-09-13 2016-08-23 Qualcomm Incorporated Signaling method in an OFDM multiple access system
US8098568B2 (en) 2000-09-13 2012-01-17 Qualcomm Incorporated Signaling method in an OFDM multiple access system
US11032035B2 (en) 2000-09-13 2021-06-08 Qualcomm Incorporated Signaling method in an OFDM multiple access system
US9130810B2 (en) 2000-09-13 2015-09-08 Qualcomm Incorporated OFDM communications methods and apparatus
US8098569B2 (en) 2000-09-13 2012-01-17 Qualcomm Incorporated Signaling method in an OFDM multiple access system
US10313069B2 (en) 2000-09-13 2019-06-04 Qualcomm Incorporated Signaling method in an OFDM multiple access system
US10194463B2 (en) 2004-07-21 2019-01-29 Qualcomm Incorporated Efficient signaling over access channel
US11039468B2 (en) 2004-07-21 2021-06-15 Qualcomm Incorporated Efficient signaling over access channel
US10237892B2 (en) 2004-07-21 2019-03-19 Qualcomm Incorporated Efficient signaling over access channel
US10517114B2 (en) 2004-07-21 2019-12-24 Qualcomm Incorporated Efficient signaling over access channel
US9137822B2 (en) 2004-07-21 2015-09-15 Qualcomm Incorporated Efficient signaling over access channel
US9148256B2 (en) 2004-07-21 2015-09-29 Qualcomm Incorporated Performance based rank prediction for MIMO design
US10849156B2 (en) 2004-07-21 2020-11-24 Qualcomm Incorporated Efficient signaling over access channel
US9246560B2 (en) 2005-03-10 2016-01-26 Qualcomm Incorporated Systems and methods for beamforming and rate control in a multi-input multi-output communication systems
US9154211B2 (en) 2005-03-11 2015-10-06 Qualcomm Incorporated Systems and methods for beamforming feedback in multi antenna communication systems
US8547951B2 (en) 2005-03-16 2013-10-01 Qualcomm Incorporated Channel structures for a quasi-orthogonal multiple-access communication system
US8446892B2 (en) 2005-03-16 2013-05-21 Qualcomm Incorporated Channel structures for a quasi-orthogonal multiple-access communication system
US9520972B2 (en) 2005-03-17 2016-12-13 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9143305B2 (en) 2005-03-17 2015-09-22 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9461859B2 (en) 2005-03-17 2016-10-04 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9184870B2 (en) 2005-04-01 2015-11-10 Qualcomm Incorporated Systems and methods for control channel signaling
US9036538B2 (en) 2005-04-19 2015-05-19 Qualcomm Incorporated Frequency hopping design for single carrier FDMA systems
US9307544B2 (en) 2005-04-19 2016-04-05 Qualcomm Incorporated Channel quality reporting for adaptive sectorization
US9408220B2 (en) 2005-04-19 2016-08-02 Qualcomm Incorporated Channel quality reporting for adaptive sectorization
US8917654B2 (en) 2005-04-19 2014-12-23 Qualcomm Incorporated Frequency hopping design for single carrier FDMA systems
US8611284B2 (en) 2005-05-31 2013-12-17 Qualcomm Incorporated Use of supplemental assignments to decrement resources
US8462859B2 (en) 2005-06-01 2013-06-11 Qualcomm Incorporated Sphere decoding apparatus
US9179319B2 (en) 2005-06-16 2015-11-03 Qualcomm Incorporated Adaptive sectorization in cellular systems
US8599945B2 (en) 2005-06-16 2013-12-03 Qualcomm Incorporated Robust rank prediction for a MIMO system
US9693339B2 (en) 2005-08-08 2017-06-27 Qualcomm Incorporated Code division multiplexing in a single-carrier frequency division multiple access system
US8885628B2 (en) 2005-08-08 2014-11-11 Qualcomm Incorporated Code division multiplexing in a single-carrier frequency division multiple access system
US9860033B2 (en) 2005-08-22 2018-01-02 Qualcomm Incorporated Method and apparatus for antenna diversity in multi-input multi-output communication systems
US9209956B2 (en) 2005-08-22 2015-12-08 Qualcomm Incorporated Segment sensitive scheduling
US9240877B2 (en) 2005-08-22 2016-01-19 Qualcomm Incorporated Segment sensitive scheduling
US9246659B2 (en) 2005-08-22 2016-01-26 Qualcomm Incorporated Segment sensitive scheduling
US9660776B2 (en) 2005-08-22 2017-05-23 Qualcomm Incorporated Method and apparatus for providing antenna diversity in a wireless communication system
US8787347B2 (en) 2005-08-24 2014-07-22 Qualcomm Incorporated Varied transmission time intervals for wireless communication system
US8644292B2 (en) 2005-08-24 2014-02-04 Qualcomm Incorporated Varied transmission time intervals for wireless communication system
US9136974B2 (en) 2005-08-30 2015-09-15 Qualcomm Incorporated Precoding and SDMA support
US8582509B2 (en) 2005-10-27 2013-11-12 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
WO2007051182A1 (en) * 2005-10-27 2007-05-03 Qualcomm Incorporated A method and apparatus for bootstraping information in a communication system
US9144060B2 (en) 2005-10-27 2015-09-22 Qualcomm Incorporated Resource allocation for shared signaling channels
US9088384B2 (en) 2005-10-27 2015-07-21 Qualcomm Incorporated Pilot symbol transmission in wireless communication systems
US10805038B2 (en) 2005-10-27 2020-10-13 Qualcomm Incorporated Puncturing signaling channel for a wireless communication system
US9172453B2 (en) 2005-10-27 2015-10-27 Qualcomm Incorporated Method and apparatus for pre-coding frequency division duplexing system
US8045512B2 (en) 2005-10-27 2011-10-25 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
US8879511B2 (en) 2005-10-27 2014-11-04 Qualcomm Incorporated Assignment acknowledgement for a wireless communication system
US8842619B2 (en) 2005-10-27 2014-09-23 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
US9225416B2 (en) 2005-10-27 2015-12-29 Qualcomm Incorporated Varied signaling channels for a reverse link in a wireless communication system
US9225488B2 (en) 2005-10-27 2015-12-29 Qualcomm Incorporated Shared signaling channel
US8477684B2 (en) 2005-10-27 2013-07-02 Qualcomm Incorporated Acknowledgement of control messages in a wireless communication system
US8565194B2 (en) 2005-10-27 2013-10-22 Qualcomm Incorporated Puncturing signaling channel for a wireless communication system
US8693405B2 (en) 2005-10-27 2014-04-08 Qualcomm Incorporated SDMA resource management
US8582548B2 (en) 2005-11-18 2013-11-12 Qualcomm Incorporated Frequency division multiple access schemes for wireless communication
US8681764B2 (en) 2005-11-18 2014-03-25 Qualcomm Incorporated Frequency division multiple access schemes for wireless communication
US7974254B2 (en) 2007-10-22 2011-07-05 Nokia Corporation Digital broadcast signaling metadata
WO2009053816A3 (en) * 2007-10-22 2009-08-13 Nokia Corp Digital broadcast signaling metadata
WO2009064531A3 (en) * 2007-11-15 2009-07-02 Qualcomm Inc Beacon-based control channels
US9326253B2 (en) 2007-11-15 2016-04-26 Qualcomm Incorporated Wireless communication channel blanking
US8798665B2 (en) 2007-11-15 2014-08-05 Qualcomm Incorporated Beacon-based control channels
JP2011504044A (en) * 2007-11-15 2011-01-27 クゥアルコム・インコーポレイテッド Beacon-based control channel
AU2008321288B2 (en) * 2007-11-15 2012-05-24 Qualcomm Incorporated Beacon-based control channels
CN101868935B (en) * 2007-11-15 2015-01-14 高通股份有限公司 Beacon-based control channels
US8761032B2 (en) 2007-11-16 2014-06-24 Qualcomm Incorporated Random reuse based control channels
AU2009210472B2 (en) * 2008-02-01 2013-05-02 Qualcomm Incorporated Method and apparatus for facilitating concatenated codes for beacon channels
WO2009099841A3 (en) * 2008-02-01 2009-12-30 Qualcomm Incorporated Method and apparatus for facilitating concatenated codes for beacon channels
US9009573B2 (en) 2008-02-01 2015-04-14 Qualcomm Incorporated Method and apparatus for facilitating concatenated codes for beacon channels
WO2009099841A2 (en) 2008-02-01 2009-08-13 Qualcomm Incorporated Method and apparatus for facilitating concatenated codes for beacon channels
US10420078B2 (en) 2008-04-07 2019-09-17 Qualcomm Incorporated Systems and methods to define control channels using reserved resource blocks
US9107239B2 (en) 2008-04-07 2015-08-11 Qualcomm Incorporated Systems and methods to define control channels using reserved resource blocks
US10939416B2 (en) 2008-04-07 2021-03-02 Qualcomm Incorporated Systems and methods to define control channels using reserved resource blocks
US8675537B2 (en) 2008-04-07 2014-03-18 Qualcomm Incorporated Method and apparatus for using MBSFN subframes to send unicast information

Also Published As

Publication number Publication date
DE102005028179A1 (en) 2006-12-28

Similar Documents

Publication Publication Date Title
WO2006134032A1 (en) Method for establishing a connection by means of mobile terminals in communication networks with variable bandwidths
WO1999021297A2 (en) Method and radicommunications system for transmitting data
DE3607687A1 (en) METHOD AND CIRCUIT ARRANGEMENT FOR SWITCHING A RADIO CONNECTION INTO ANOTHER RADIO CELL OF A DIGITAL RADIO TRANSMISSION SYSTEM
DE10105219A1 (en) Non-SDMA system with an SDMA process
EP0954122A1 (en) Method for the management of a radio communication system and such a system
EP1652321B1 (en) Method for synchronisation of a radio communication system divided into radio cells, and a base station and a mobile station in such a system
DE19810285A1 (en) Channel characteristics determination for radio communications system
DE19901755C2 (en) Frequency band allocation to radio communication systems
EP0973349A2 (en) Calling a mobile station with multiple subscriber identities by broadcast
EP1135892A2 (en) Communications method and system for transmitting data of several combined services via physical channels which are used in common
EP1163746B1 (en) Method and radiotelecommunications system for synchronising subscriber stations
EP1226666B1 (en) Method for synchronising an uplink signal transmission in a radio communication system
DE19827700C1 (en) Base station method for transmitting organizational information in a radio communication system
EP1027811B1 (en) Transmission/reception process and device and radio communications system for data transmission
EP2095591B1 (en) OFDM communication system with fast frequency hops
DE69616588T2 (en) ADMISSION OF A PARTICIPANT IN A RADIO NETWORK
EP1305974A1 (en) Method for differentiating logic channels in a commonly used physical transmission channel of a radio communication system
EP1226659B1 (en) Method of carrying out an uplink synchronization of the signal transmission in a radio communication system
WO2000013446A1 (en) Method for transmitting voice information in a radiocommunication system
EP1013128B1 (en) Method and device for transmitting user data in a radiocommunication system
EP1208661B1 (en) Method for measuring the intercell interference in a frequency channel
EP0991289A2 (en) Base station for a radio communication system
DE19808948C2 (en) Method, radio communication system and mobile station for information transmission
WO1999049673A1 (en) Method and radiocommunications system for controlling connections for calls to and by radio subscribers
DE19959179A1 (en) Method for dynamically changing rate adjustment factors in a radio communication system

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Country of ref document: DE

122 Ep: pct application non-entry in european phase

Ref document number: 06763421

Country of ref document: EP

Kind code of ref document: A1