WO2001054288A2 - Method for the decentralised management of measurement results in a radio communications system - Google Patents

Method for the decentralised management of measurement results in a radio communications system Download PDF

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Publication number
WO2001054288A2
WO2001054288A2 PCT/DE2001/000208 DE0100208W WO0154288A2 WO 2001054288 A2 WO2001054288 A2 WO 2001054288A2 DE 0100208 W DE0100208 W DE 0100208W WO 0154288 A2 WO0154288 A2 WO 0154288A2
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Prior art keywords
rnc
radio
controlling
management
control device
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PCT/DE2001/000208
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German (de)
French (fr)
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WO2001054288A3 (en
Inventor
Jörn KRAUSE
Armin Sitte
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Siemens Aktiengesellschaft
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Priority to EP01913518A priority Critical patent/EP1249149A2/en
Priority to AU39136/01A priority patent/AU3913601A/en
Publication of WO2001054288A2 publication Critical patent/WO2001054288A2/en
Publication of WO2001054288A3 publication Critical patent/WO2001054288A3/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/24—Monitoring; Testing of receivers with feedback of measurements to the transmitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/12—Reselecting a serving backbone network switching or routing node
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria

Definitions

  • the invention relates to a method for managing measurement results in a radio communication system, in particular in a mobile radio system.
  • a connection between at least one base radio station Node B and several subscriber terminals UE (user equipment) is established via a so-called radio interface, which can in particular be mobile, but also stationary transmitting and receiving devices and which are the lowest links of the radio communication system.
  • a base radio station Node B supplies a radio zone of up to several square kilometers, a so-called radio cell Z. Due to the spatial limitation of a radio zone, the scarce carrier frequencies on which the data are transmitted in modulated form can be reused at a certain distance without causing mutual interference (Intercell interference) is coming.
  • several radio cells Z form a radio area RNS (Radio Network Subsystem) which is managed jointly by a base radio station controller RNC (Radio Network Controller). Multiple radio areas
  • UTRAN Universal Telecommunications Radio Access Network
  • synchronous multiplexing methods based on frequency, time and / or spreading code selective multiple access to distribute the transmission capacity of a channel over several connections were introduced, which were implemented accordingly with FDMA (Frequency Division Multiple Access), TDMA (Time Division Multiple Access) and CDMA (Code Division Multiple Access).
  • FDMA Frequency Division Multiple Access
  • TDMA Time Division Multiple Access
  • CDMA Code Division Multiple Access
  • the UMTS mobile radio system described uses numerous measurements in accordance with the referenced prior art [8] of the subscriber terminals and the network (UTRAN) to control and optimize the use of their radio resources.
  • This control and optimization in the Radio Network System (RNS) of UTRAN according to FIGS. 1 and 4 is the so-called Radio Network Controller (RNC) as a physical unit, more precisely the so-called Radio Resource Control (RRC) protocol according to the referenced status the technology according to [5].
  • RRC Radio Network Controller
  • D-RNS is the RNS assigned to the radio cell in which the UE is located.
  • the so-called dedicated channels are managed in the MAC-d of the S-RNC.
  • the MAC-c of the D-RNC the com on control channels, and in the MAC-sh manages the shared channels with the D-RRC (see Fig. 7).
  • the UE moves a radio cell during a connection that is not controlled by the S-RNC, there are two options for maintaining the connection on the network side:
  • the S-RNC can also communicate with several D-RNCs for the so-called soft handover (HO).
  • Soft HO only refers to the dedicated channels (DCH). If several RNCs are involved in the Soft HO, the S-RNC always exercises control. This is the reason that the associated MAC-d instance is always in the S-RNC, even if the data from there go via Iur to the node Bs of all radio cells of the D-RNC.
  • the S-RNC controls the measurements of the dedicated channels via the messages 'Measurement Request', 'Measurement Reportmg' and 'Measurement Termination x', the measurements on the common and shared channels are not yet specified.
  • the invention has for its object to provide a method that enables more efficient management of measurements in the described system. This task is solved by the independent claims. Further developments of the invention can be found in the dependent claims.
  • the first exemplary embodiment concerns the control of the so-called timing advance, whereby only the TDD mode is considered here:
  • the correct time of transmission in subsequent upward direction transmissions is determined UE set by a timing advance (TA) signaled in the downward direction (DL - downlink).
  • TA timing advance
  • the calculation of the TA and the signaling of the TA to the UE are transferred to the C-RNC, which relieves the Iur and also reduces delays in the transmission of the TA to the UE.
  • the second exemplary embodiment relates to the control of a call forwarding (HO handover):
  • a UE regularly measures the reception powers of the neighboring cells from the so-called HO monitoring set (for a UE in a TDD cell, see [8]: eg P-CCPCH RSCP for TDD neighboring cell, CPICH RSCP for FDD Neighbor cell and GSM camer RSSI for GSM neighboring cell), and reports the radio cells with the strongest reception levels, the so-called HO candidate set, back to the RRC in UTRAN.
  • the HO decision is based on this RRC and is communicated to the UE and the radio cells involved. If the management of these measurements, ie requesting the measurements and using the reports, is carried out in the C-RNC instead of in the S-RNC, this relieves the Iur.
  • a suitable cell for the HO is then proposed on the basis of these measurement results in the C-RRC and is reported to the S-RRC in order to take into account the effect of the S-RRC in terms of an anchor function. This is important, for example, if the HO also involves a change in the C-RNC
  • the radio connections (radio links of the different cells for a dedicated channel in the soft HO, the so-called active set) are combined by selecting the best received frame of all cells in the S-RNC Which cells are in the soft HO, ie which belong to the active set, is determined by measuring the various common channel CPICHs. If these measurement results are not reported from the UE to the UTRAN on dedicated channels, the affiliation of radio cells becomes the active set according to the invention also managed in the C-RNC.
  • the measurement reports can also be distinguished from the other data using a so-called MAC header, so that the measurement results can be sent from the MAC directly to the RRC without passing through the RLC.
  • the third exemplary embodiment relates to dynamic channel allocation (DCA - Dynamic Channel Allocation), whereby in turn only one implementation is considered for the TDD mode:
  • the TDD mode For the rapid allocation of resources for shared channels, it is advantageous for the TDD mode to manage these resources in the C-RNC. This implies an administration of nierfur necessary measurements, such as RSCP a shared channels and timeslot ISCP, in advance in the C-RNC.
  • the C-RNC In order to avoid conflicts between the resources for shared and dedicated channels, the C-RNC must first have information from the S-RNC about all available resources (code / time / frequency space) available for shared channels.
  • the fourth exemplary embodiment relates to the transmission power control (PC - Power Control):
  • the fast control loop of the power control (inner loop PC) determined by the physical layer (layer 1) is contrasted by a slower outer control loop (outer loop PC; defined on a higher layer), which specifies a long-term goal for the transmission power (SIRtarget).
  • control over the outer loop PC is transferred to the C-RNC in accordance with the above statements.
  • a possible implementation for the transfer of competencies from the S-RNC to the C-RNC is a message that is for a given channel, shared channel or common channel, a given set of measurements and stating events that require reporting, for example an upcoming HO or be a reallocation of resources that must be communicated to the S-RRC, transmitted from the S-RRC to the C-RRC via the Iur.
  • the C-RRC can then independently request measurements or evaluate measurement reports, for example from the UE and / or the radio cells, until the event occurs. After the feedback, the control of the measurements passes back to the S-RNC, if necessary, until the next transfer of competence.
  • RAN WG3 TS 25.401 v3.0.0, UTRAN Overall Description
  • RAN WG3 TS 25.420 vl.0.1
  • UTRAN Iur Interface General Aspects and Prmciples
  • RAN WG2 TS 25.301 v3.2.0, Radio Interface Protocol Architecture
  • RAN WG2 TS 25.321 v3.1.0, MAC protocol specification
  • RAN WG2 TS 25.331 v3.0.0, RRC
  • RAN WG1 TS25.225 v3.0.0, Physical Layer - Measurements (TDD)
  • RAN WG1 TS25.215 v3.0.0, Physical Layer - Measurements (FDD)

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

According to the invention, the management of the measurement results is at least temporarily transmitted from supply controlling equipment (S-RNC) to controlling control equipment (C-RNC, D-RNC).

Description

Beschreibungdescription
Verfahren zur dezentralen Verwaltung von Meßergebnissen m einem Funk-KommunikationssystemProcess for decentralized management of measurement results in a radio communication system
Die Erfindung betrifft ein Verfahren zur Verwaltung von Meßergebnissen m einem Funk-Kommunikationssystem, insbesondere in einem Mobilfunksystem.The invention relates to a method for managing measurement results in a radio communication system, in particular in a mobile radio system.
In der Fig. 1 ist entsprechend der Seite 11 des referenzier- ten Standes der Technik gemäß [1] beispielhaft die logische Architektur des zukunftigen universellen Telekommunikations- systems UMTS (Universal Mobile Telecom unications System) dargestellt, ohne daß die Erfindung hierauf beschrankt wäre.1, the logical architecture of the future universal telecommunications system UMTS (Universal Mobile Telecommunications Unications System) is shown by way of example according to page 11 of the referenced prior art according to [1], without the invention being restricted to this.
Über eine sogenannte Funkschnittstelle wird eine Verbindung zwischen mindestens einer Basisfunkstation Node B und mehreren Teilnehmerendgeraten UE (User Equipment), die insbesondere mobile, aber auch ortsfeste Sende- und Empfangsgeräte sein können und die untersten Glieder des Funk-Kommumkati- onssystems sind, hergestellt. Eine Basisfunkstation Node B versorgt eine bis zu mehrere Quadratkilometer große Funkzone, eine sogenannte Funkzelle Z. Infolge der raumliche Begrenzung einer Funkzone lassen sich die knappen Tragerfrequenzen, auf denen die Daten moduliert übertragen werden, m einer gewissen Entfernung wiederverwenden, ohne daß es zu gegenseitigen Störungen ( Interzell-Interferenzen) kommt. Mehrere Funkzellen Z bilden hierfür einen gemeinsam von einer Basisfunkstationssteuerung RNC (Radio Network Controller) verwalteten Funk- bereich RNS (Radio Network Subsystem) . Mehrere FunkbereicheA connection between at least one base radio station Node B and several subscriber terminals UE (user equipment) is established via a so-called radio interface, which can in particular be mobile, but also stationary transmitting and receiving devices and which are the lowest links of the radio communication system. A base radio station Node B supplies a radio zone of up to several square kilometers, a so-called radio cell Z. Due to the spatial limitation of a radio zone, the scarce carrier frequencies on which the data are transmitted in modulated form can be reused at a certain distance without causing mutual interference (Intercell interference) is coming. For this purpose, several radio cells Z form a radio area RNS (Radio Network Subsystem) which is managed jointly by a base radio station controller RNC (Radio Network Controller). Multiple radio areas
RNS bilden ein Funknetz (UTRAN = Universal Telecommunications Radio Access Network) , über das die Verbindung mit dem Kernnetz CN (Core Network) des Mobilko munikationssystems UMTS hergestellt wird, und welches u.a. den Zugang zum analogen und digitalen Festnetz PSTN, ISDN, in ein spezielles Paket- Vermittlungsnetz, insbesondere ein ATM- (Asynchron Transfer Mode) und IP- (Internet Protocol) Netz, oder m ein weiteres Mobilfunknetz erlaubt.RNS form a radio network (UTRAN = Universal Telecommunications Radio Access Network), via which the connection to the core network CN (Core Network) of the UMTS mobile communication system is established, and which, among other things, gives access to the analog and digital fixed network PSTN, ISDN, in a special Package- Switching network, in particular an ATM (Asynchronous Transfer Mode) and IP (Internet Protocol) network, or m another mobile network is allowed.
Um das insgesamt zur Verfugung stehende Spektrums an Tragerfrequenzen besser nutzen zu können, s nd synchrone Multiplex- verfahren auf der Basis eines frequenz-, zeit- und/ oder spreizcodeselektiven Vielfachzugriffs zur Verteilung der Übertragungskapazität eines Kanals auf mehrere Verbindungen eingeführt worden, die entsprechend mit FDMA (Frequency Division Multiple Access), TDMA (Time Division Multiple Access) und CDMA (Code Division Multiple Access) bezeichnet werden. Hierzu wird in Absprache zwischen Sender und Empfanger unter Einbeziehung der Basisfunkstationen eine fest vorgegebene Zu- ordnung aus sende- und empfangssynchronen Frequenzbandern, Zeitschlitzen und/oder Codes genutzt.To make better use of the spectrum of carrier frequencies available, synchronous multiplexing methods based on frequency, time and / or spreading code selective multiple access to distribute the transmission capacity of a channel over several connections were introduced, which were implemented accordingly with FDMA (Frequency Division Multiple Access), TDMA (Time Division Multiple Access) and CDMA (Code Division Multiple Access). To this end, in consultation between the sender and receiver, including the base radio stations, a predefined assignment of frequency bands, time slots and / or codes synchronized with transmission and reception is used.
Das beschriebene UMTS-Mobilfunksystem nutzt zahlreiche Messungen entsprechend dem referenzierten Stand der Technik ge- maß [8] der Teilehmerendgerate und des Netzwerkes (UTRAN) zur Kontrolle und Optimierung der Ausnutzung ihrer Funkressourcen. Diese Kontrolle und Optimierung obliegt im Radio Network System (RNS) des UTRAN entsprechend den Fig. 1 und 4 dem sogenannten Radio Network Controller (RNC) als physikalischer Einheit, genauer gesagt dem sogenannten Radio Ressource Con- trol (RRC) Protokoll entsprechend dem referenzierten Stand der Technik gemäß [5] .The UMTS mobile radio system described uses numerous measurements in accordance with the referenced prior art [8] of the subscriber terminals and the network (UTRAN) to control and optimize the use of their radio resources. This control and optimization in the Radio Network System (RNS) of UTRAN according to FIGS. 1 and 4 is the so-called Radio Network Controller (RNC) as a physical unit, more precisely the so-called Radio Resource Control (RRC) protocol according to the referenced status the technology according to [5].
In der Architektur des UTRAN unterscheidet man das sogenannte S-RNS (Servmg-„bedιenendesxv-RNS) mit S-RRC, das durch ein aktives Iu-Interface gekennzeichnet ist, vom sogenannten D- RNS (Drift-RNS) . D-RNS ist dabei das der Funkzelle, m der sich das UE befindet, zugeordnete RNS. Im MAC-d des S-RNC die sogenannten dedicated Channels verwaltet. Dahingegen werden im MAC-c des D-RNC die com on control Channels, und im MAC-sh die shared Channels mit dem D-RRC verwaltet (Siehe eweils Fig. 7) .In the architecture of the UTRAN, a distinction is made between the so-called S-RNS (Servmg- "operating xv- RNS) with S-RRC, which is characterized by an active Iu interface, from the so-called D-RNS (drift RNS). D-RNS is the RNS assigned to the radio cell in which the UE is located. The so-called dedicated channels are managed in the MAC-d of the S-RNC. In contrast, in the MAC-c of the D-RNC the com on control channels, and in the MAC-sh manages the shared channels with the D-RRC (see Fig. 7).
Bewegt sich das UE wahrend einer Verbindung m eine Funk- zelle, die nicht vom S-RNC kontrolliert wird, so bestehen zwei Möglichkeiten, netzwerkseitig die Verbindung aufrecht zu erhalten :If the UE moves a radio cell during a connection that is not controlled by the S-RNC, there are two options for maintaining the connection on the network side:
Dieses kann zum einen durch eine sogenannte S-RNS-Realocation erfolgen (Siehe Fig. 3) . Dieses ist jedoch der aufwendigere und daher seltenere Fall, m dem das D-RNS für dieses UE eine eigene Iu-Verbmdung zum Core Network aufbaut und so selbst zum S-RNS wird. Zum anderen kommuniziert das D-RNS weiterhin über das Iur-Interface mit dem S-RNS (Siehe Fig. 2) .This can be done on the one hand by a so-called S-RNS-Realocation (see Fig. 3). However, this is the more complex and therefore rarer case in which the D-RNS establishes its own Iu connection to the core network for this UE and thus itself becomes the S-RNS. On the other hand, the D-RNS continues to communicate with the S-RNS via the Iur interface (see FIG. 2).
Für den FDD-Modus (Frequency Devision Duplex) des UTRA kann der S-RNC für das sogenannte Soft Handover (HO - Verbmdungs- weiterschaltung) auch mit mehreren D-RNCs kommunizieren. Soft HO bezieht sich nur auf die dedicated Channels (DCH) . Sind mehrere RNCs am Soft HO beteiligt, so übt stets der S-RNC die Kontrolle aus. Dies ist der Grund dafür, daß sich die dazugehörige MAC-d Instanz stets im S-RNC befindet, auch wenn die Daten von dort über Iur zu den Node Bs aller Funkzellen des D-RNCs gelangen.For the FDD mode (Frequency Division Duplex) of the UTRA, the S-RNC can also communicate with several D-RNCs for the so-called soft handover (HO). Soft HO only refers to the dedicated channels (DCH). If several RNCs are involved in the Soft HO, the S-RNC always exercises control. This is the reason that the associated MAC-d instance is always in the S-RNC, even if the data from there go via Iur to the node Bs of all radio cells of the D-RNC.
Bei dem TDD-Modus gibt es kein Soft Handover, bei dem ein UE die gleichen Daten von verschiedenen Basisstationen Node B empfangt. Aus Harmonisierungsgrunden zwischen den beiden Modi FDD und TDD wurde aber der Splitt m der Architektur bei FDD zwischen MAC-d im S-RNC und MAC-sh und MAC-c im D-RNC auch für TDD übernommen. Teilweise wird in diesem Zusammenhang noch zwischen dem Drift RNC und dem Controlling RNC (C-RNC) unterschieden. C-RNC ist dann das D-RNC, das die Kontrolle über die Funkzelle hat, m der sich das UE befindet. Die Kommunikation auf dem Iur Interface zwischen S-RNC und D- RNC bzw. C-RNC ist in dem referenzierten Stand der Technik gemäß [6] spezifiziert. Nach dem dargelegten Stand der Technik kontrolliert dabei das S-RNC über die Messages ,Measure- ment Request', ,Measurement Reportmg und ,Measurement Ter- mmation x die Messungen der dedicated Channels, αie Messungen auf den common und den shared Channels sind noch nicht spezifiziert.In the TDD mode there is no soft handover in which a UE receives the same data from different base stations Node B. For reasons of harmonization between the two modes FDD and TDD, however, the split m of the architecture in FDD between MAC-d in S-RNC and MAC-sh and MAC-c in D-RNC was also adopted for TDD. In this context, a distinction is sometimes made between the drift RNC and the controlling RNC (C-RNC). The C-RNC is then the D-RNC that has control over the radio cell on which the UE is located. Communication on the Iur interface between S-RNC and D-RNC or C-RNC is specified in the referenced prior art according to [6]. According to the state of the art, the S-RNC controls the measurements of the dedicated channels via the messages 'Measurement Request', 'Measurement Reportmg' and 'Measurement Termination x', the measurements on the common and shared channels are not yet specified.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren anzugeben, das eine effizientere Verwaltung von Messungen in dem beschriebenen System ermöglicht. Diese Aufgabe wird durch die unabhängigen Patentansprüche gelost. Weiterbildungen der Erfindung sind den abhangigen Patentansprüchen zu entnehmen.The invention has for its object to provide a method that enables more efficient management of measurements in the described system. This task is solved by the independent claims. Further developments of the invention can be found in the dependent claims.
Der beschriebene Stand der Technik sowie das erfmdungsgemaße Verfahren und die damit zusammenwirkenden Komponenten des Funk-Kommunikationssystems werden anhand von zeichnerischen Darstellungen naher erl utert. Dabei zeigen die Fig. 1 bis 7 jeweils Blockschaltbilder aus den referenzierten Dokumenten des Standes der Technik gemäß [1] bis [9] .The described prior art as well as the method according to the invention and the components of the radio communication system interacting therewith are explained in more detail on the basis of graphic representations. 1 to 7 each show block diagrams from the referenced documents of the prior art according to [1] to [9].
Erfmdungsgemaß wird ein Konzept vorgeschlagen, bei dem Kompetenzen für die Verwaltung von Messungen von dem S-RNC zu dem C-RNC bzw. D-RNC übertragbar sind.According to the invention, a concept is proposed in which competencies for the administration of measurements can be transferred from the S-RNC to the C-RNC or D-RNC.
Auf diese Weise wird das Iur von der Übertragung von Meßbefehlen und Meßreports entlastet und die Reaktionsgeschwindigkeit auf Meßergebnisse erhöht. Letzteres ist besonders dann von Vorteil, wenn es sich um funkzellspezifische Messungen handelt .In this way, the Iur is relieved of the transmission of measurement commands and measurement reports and the reaction speed to measurement results is increased. The latter is particularly advantageous when it comes to radio cell-specific measurements.
Die Vorteile des Konzepts wirken sich insbesondere für Messungen auf den control Channels und den shared Channels aus, wenn dem RRC im C-RNC auch die Kontrolle über die Verwertung dieser Meßergebnisse übertragen wird.The advantages of the concept particularly affect measurements on the control channels and the shared channels, if the RRC in the C-RNC also has control over the utilization of these measurement results is transmitted.
Anhand mehrerer Ausführungsbeispiele soll im folgenden das erfmdungsgemaße Verfahren erläutert werden.The method according to the invention is to be explained below using several exemplary embodiments.
Das erste Ausfuhrungsbeispiel betrifft die Steuerung des sogenannten Timing advance, wobei hierbei nur der TDD-Modus betrachtet wird:The first exemplary embodiment concerns the control of the so-called timing advance, whereby only the TDD mode is considered here:
Durch die Messung des Empfangszeitpunktes auf einem in Aufwärtsrichtung (UL - uplink) genutzten Kanal, beispielsweise PRACH, PUSCH und/oder UL DPCH (Siehe Stand der Technik gemäß [8]) RX timing deviation, wird für nachfolgende Übertragungen in Aufwärtsrichtung der korrekte Sendezeitpunkt im UE durch einen in Abwärtsrichtung (DL - downlink) signalisierten timing advance (TA) eingestellt.By measuring the time of reception on a channel used in the upward direction (UL uplink), for example PRACH, PUSCH and / or UL DPCH (see prior art according to [8]) RX timing deviation, the correct time of transmission in subsequent upward direction transmissions is determined UE set by a timing advance (TA) signaled in the downward direction (DL - downlink).
Die Berechnung des TA und die Signalisierung des TA an das UE wird erfindungsgemäß dem C-RNC übertragen, wodurch das Iur entlastet wird und auch Verzogerungen bei der Übertragung des TA an das UE verringert werden.According to the invention, the calculation of the TA and the signaling of the TA to the UE are transferred to the C-RNC, which relieves the Iur and also reduces delays in the transmission of the TA to the UE.
Das zweite Ausführungsbeispiel betrifft die Steuerung einer Verbindungsweiterschaltung (HO - Handover) :The second exemplary embodiment relates to the control of a call forwarding (HO handover):
Zur Vorbereitung eines HO mißt ein UE regelmäßig die Empfangsleistungen der Nachbarzellen aus dem sogenannten HO mo- nitoring set (für ein UE in einer TDD-Zelle, siehe hierzu [8]: z.B. P-CCPCH RSCP für TDD-Nachbarzelle, CPICH RSCP für FDD-Nachbarzelle und GSM camer RSSI für GSM-Nachbarzelle) , und meldet die Funkzellen mit den stärksten Empfangspegeln, das sogenannte HO candidate set, an das RRC im UTRAN zurück. Die HO-Entscheidung geht von diesem RRC aus und wird dem UE und den beteiligten Funkzellen mitgeteilt. Wird die Verwaltung dieser Messungen, d.h. Anforderung der Messungen und Verwertung der Reports, im C-RNC vorgenommen anstatt im S-RNC, so entlastet dies das Iur. Der Vorschlag einer geeigneten Zelle für das HO erfolgt dann erfmdungsge- maß auf Basis dieser Meßergebnisse im C-RRC und wird dem S- RRC gemeldet, um der Wirkung des S-RRC m Sinne einer Ankerfunktion Rechnung zu tragen. Dies ist beispielsweise von Bedeutung, wenn mit dem HO auch ein Wechsel des C-RNC verbundenTo prepare an HO, a UE regularly measures the reception powers of the neighboring cells from the so-called HO monitoring set (for a UE in a TDD cell, see [8]: eg P-CCPCH RSCP for TDD neighboring cell, CPICH RSCP for FDD Neighbor cell and GSM camer RSSI for GSM neighboring cell), and reports the radio cells with the strongest reception levels, the so-called HO candidate set, back to the RRC in UTRAN. The HO decision is based on this RRC and is communicated to the UE and the radio cells involved. If the management of these measurements, ie requesting the measurements and using the reports, is carried out in the C-RNC instead of in the S-RNC, this relieves the Iur. According to the invention, a suitable cell for the HO is then proposed on the basis of these measurement results in the C-RRC and is reported to the S-RRC in order to take into account the effect of the S-RRC in terms of an anchor function. This is important, for example, if the HO also involves a change in the C-RNC
Bei dem FDD-Modus werden die Funkverbindungen (radio links der verschiedenen Zellen für einen dedicated Channel im soft HO, das sogenannte active set, dadurch kombiniert, daß e- weils das am besten empfangene frame (Rahmen) aller Zellen im S-RNC ausgewählt wird. Welche Zellen sich im soft HO befir- den, also zum active set gehören, wird durch Messung der verschiedenen common Channel CPICH bestimmt. Werden diese Meßergebnisse nicht auf dedicated Channels vom UE an das UTRAN ge- meldet, so wird die Zugehörigkeit von Funkzellen zum active set erfmdungsgemaß auch im C-RNC verwaltet.In the FDD mode, the radio connections (radio links of the different cells for a dedicated channel in the soft HO, the so-called active set) are combined by selecting the best received frame of all cells in the S-RNC Which cells are in the soft HO, ie which belong to the active set, is determined by measuring the various common channel CPICHs.If these measurement results are not reported from the UE to the UTRAN on dedicated channels, the affiliation of radio cells becomes the active set according to the invention also managed in the C-RNC.
Zu beachten ist dabei, daß die Measurement Reports dabei auch mit Hilfe eines sog. MAC-headers von den anderen Daten unter- schieden werden können, so daß die Meßresultate vom MAC direkt an das RRC gehen können, ohne den RLC zu passieren.It should be noted that the measurement reports can also be distinguished from the other data using a so-called MAC header, so that the measurement results can be sent from the MAC directly to the RRC without passing through the RLC.
Das dritte Ausfuhrungsbeispiel betrifft die dynamische Kanal- zuweisung (DCA - Dynamic Channel Allocation) , wobei wiederum nur eine Verwirklichung für den TDD-Modus berücksichtigt wird:The third exemplary embodiment relates to dynamic channel allocation (DCA - Dynamic Channel Allocation), whereby in turn only one implementation is considered for the TDD mode:
Für die schnelle Allokierung von Ressourcen für shared Channels ist für den TDD-Modus eine Verwaltung dieser Ressourcen im C-RNC von Vorteil. Dies setzt eine Verwaltung der nierfur notwendigen Messungen, wie beispielsweise RSCP a shared Channels und Timeslot ISCP, im C-RNC voraus.For the rapid allocation of resources for shared channels, it is advantageous for the TDD mode to manage these resources in the C-RNC. This implies an administration of nierfur necessary measurements, such as RSCP a shared channels and timeslot ISCP, in advance in the C-RNC.
Um Konflikte zwischen den Ressourcen für shared und dedicated channnels zu vermeiden, muß dem C-RNC vom S-RNC zuvor eine Information über alle für shared Channels verfugbaren freien Ressourcen (Code/Zeit/Frequenzraum) vorliegen.In order to avoid conflicts between the resources for shared and dedicated channels, the C-RNC must first have information from the S-RNC about all available resources (code / time / frequency space) available for shared channels.
Das vierte Ausfuhrungsbeispiel betrifft die Sendeleistungsre- gelung (PC - Power Control) :The fourth exemplary embodiment relates to the transmission power control (PC - Power Control):
Der vom physical layer (Schicht 1) bestimmten schnellen Re- gelschleife der Leistungsregelung (inner loop PC) steht eine langsamere ußere Regelschleife (outer loop PC; festgelegt auf höherem layer) gegenüber, die ein langerfristiges Ziel für die Sendeleistung vorgibt (SIRtarget) .The fast control loop of the power control (inner loop PC) determined by the physical layer (layer 1) is contrasted by a slower outer control loop (outer loop PC; defined on a higher layer), which specifies a long-term goal for the transmission power (SIRtarget).
Für die shared Channels wird erfmdungsgemaß entsprechend den obigen Ausfuhrungen die Kontrolle ber die outer loop PC dem C-RNC übertragen.For the shared channels, control over the outer loop PC is transferred to the C-RNC in accordance with the above statements.
Eine mögliche Realisierung für die Kompetenzubertragung vom S-RNC an den C-RNC ist erfmdungsgemaß eine Meldung, die f r einen vorgegebenen Kanal, shared Channel oder common Channel, einen vogegebenen Satz von Messungen und unter Angabe von meldepflichtigen Ereignissen, dies kann beispielsweise ein anstehender HO oder eine Neuzuteilung von Ressourcen sein, die dem S-RRC mitgeteilt werden muß, vom S-RRC an den C-RRC über das Iur übertragen wird.According to the invention, a possible implementation for the transfer of competencies from the S-RNC to the C-RNC is a message that is for a given channel, shared channel or common channel, a given set of measurements and stating events that require reporting, for example an upcoming HO or be a reallocation of resources that must be communicated to the S-RRC, transmitted from the S-RRC to the C-RRC via the Iur.
Der C-RRC kann dann bis zum Eintritt des Ereignisses selbständig Messungen anfordern oder Meßberichte, beispielsweise vom UE und/oder den Funkzellen, auswerten. Nach der Ruckmeldung geht die Kontrolle der Messungen gegebenenfalls bis zur nächsten Kompetenzubertragung wieder an den S-RNC über. Referenzierte LiteraturThe C-RRC can then independently request measurements or evaluate measurement reports, for example from the UE and / or the radio cells, until the event occurs. After the feedback, the control of the measurements passes back to the S-RNC, if necessary, until the next transfer of competence. Referenced literature
[1] RAN WG3: TS 25.401 v3.0.0, UTRAN Overall Description[1] RAN WG3: TS 25.401 v3.0.0, UTRAN Overall Description
[2] RAN WG3: TS 25.420 vl.0.1, UTRAN Iur Interface: General Aspects and Prmciples[2] RAN WG3: TS 25.420 vl.0.1, UTRAN Iur Interface: General Aspects and Prmciples
[3] RAN WG2: TS 25.301 v3.2.0, Radio Interface Protocol Ar- chitecture[3] RAN WG2: TS 25.301 v3.2.0, Radio Interface Protocol Architecture
[4] RAN WG2: TS 25.321 v3.1.0, MAC protocol specification[4] RAN WG2: TS 25.321 v3.1.0, MAC protocol specification
[5] RAN WG2: TS 25.331 v3.0.0, RRC[5] RAN WG2: TS 25.331 v3.0.0, RRC
Kapitel 8.4: Measurement procedures Kapitel 10.1.2: Measurement MessagesChapter 8.4: Measurement procedures Chapter 10.1.2: Measurement messages
Kapitel 10.2.7: Measurement Information ElementsChapter 10.2.7: Measurement Information Elements
[6] RAN WG3: TS 25.423 vl.4.0, RNSAP Kapitel 8.2.9, 8.2.10, 8.2.11: DCH Procedures Kapitel 8.3: Common Transport Channel Procedures[6] RAN WG3: TS 25.423 vl.4.0, RNSAP chapter 8.2.9, 8.2.10, 8.2.11: DCH procedures chapter 8.3: Common Transport Channel Procedures
[7] RAN WG3: TS 25.433 vl.3.0, NBAP Common Procedures:[7] RAN WG3: TS 25.433 vl.3.0, NBAP Common Procedures:
Kapitel 8.1.4: Radio Network Performance Measurement Kapitel 8.1.9: Neighbour Cell Measurement (for TDD) Dedicated Procedures: Kapitel 8.2.6: Radio Network Performance MeasurementChapter 8.1.4: Radio Network Performance Measurement Chapter 8.1.9: Neighbor Cell Measurement (for TDD) Dedicated Procedures: Chapter 8.2.6: Radio Network Performance Measurement
[8] RAN WG1: TS25.225 v3.0.0, Physical Layer - Measurements (TDD)[8] RAN WG1: TS25.225 v3.0.0, Physical Layer - Measurements (TDD)
[9] RAN WG1: TS25.215 v3.0.0, Physical Layer - Measurements (FDD) [9] RAN WG1: TS25.215 v3.0.0, Physical Layer - Measurements (FDD)

Claims

Patentansprüche claims
1. Verfahren zur Verwaltung von Meßergebnissen m einem Funk-Kommunikationssystem, bei dem von einer versorgenden Steuereinrichtung (S-RNC) zumindest zeitweise e ne Verwaltung der Meßergebnisse zu einer kontrollierenden Steuereinrichtung (C-RNC, D-RNC) übertragen wird.1. Method for managing measurement results in a radio communication system in which a supplying control device (S-RNC) transmits at least temporarily a management of the measurement results to a controlling control device (C-RNC, D-RNC).
2. Verfahren nach Anspruch 1, bei dem das Funk-Kommunikationssystem ein TDMA-basiertes Teilnehmer- separierungsverfahren nutzt, wobei eine Funkkanalressource durch zumindest ein Frequenzband (B) und einen Zeitschlitz (ts) definiert wird.2. The method as claimed in claim 1, in which the radio communication system uses a TDMA-based subscriber separation method, a radio channel resource being defined by at least one frequency band (B) and one time slot (ts).
3. Verfahren nach Anspruch 2, bei dem das Funk-Kommunikationssystem zusätzlich ein CDMA-Teilnehmer- sepaπerungsverfahren nutzt.3. The method of claim 2, wherein the radio communication system additionally uses a CDMA subscriber separation method.
4. Verfahren nach einem vorhergehenden Anspruch, bei dem die Übertragung der Verwaltung zu der kontrollierenden Steuereinrichtung (C-RNC, D-RNC) für eine Steuerung eines Timing Advance (TA) einer Teilnehmerstation (UE) genutzt wird.4. The method according to any preceding claim, in which the transmission of management to the controlling control device (C-RNC, D-RNC) is used for controlling a timing advance (TA) of a subscriber station (UE).
5. Verfahren nach einem vorhergehenden Anspruch, bei dem die Übertragung der Verwaltung zu der kontrollierenden Steuereinrichtung (C-RNC, D-RNC) für eine Steuerung einer Verbin- dungsweiterschaltung genutzt wird.5. The method according to any preceding claim, in which the transfer of administration to the controlling control device (C-RNC, D-RNC) is used for controlling a connection forwarding.
6. Verfahren nach einem vorhergehenden Anspruch, bei dem die Übertragung der Verwaltung zu der kontrollierenden Steuereinrichtung (C-RNC, D-RNC) für eine Steuerung einer dynamischen Kanalzuweisung genutzt wird. 6. The method according to any preceding claim, wherein the transfer of management to the controlling control device (C-RNC, D-RNC) is used for controlling a dynamic channel assignment.
7. Verfahren nach einem vorhergehenden Anspruch, bei dem die Übertragung der Verwaltung zu der kontrollierenden Steuereinrichtung (C-RNC, D-RNC) für eine Sendeleistungssteuerung der Teilnehmerstation (UE) genutzt wird.7. The method according to any preceding claim, wherein the transmission of management to the controlling control device (C-RNC, D-RNC) is used for a transmission power control of the subscriber station (UE).
8. Funk-Kommunikationssystems zur Durchfuhrung des Verfahrens nach Anspruch 1. 8. Radio communication system for performing the method according to claim 1.
PCT/DE2001/000208 2000-01-18 2001-01-18 Method for the decentralised management of measurement results in a radio communications system WO2001054288A2 (en)

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WO1998057450A1 (en) * 1997-06-13 1998-12-17 Telefonaktiebolaget Lm Ericsson Methods and arrangements in a radio communications system
WO1999044384A1 (en) * 1998-02-27 1999-09-02 Siemens Aktiengesellschaft Relaying in a telecommunications system based on code and time-division multiplex

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WO1998057450A1 (en) * 1997-06-13 1998-12-17 Telefonaktiebolaget Lm Ericsson Methods and arrangements in a radio communications system
WO1999044384A1 (en) * 1998-02-27 1999-09-02 Siemens Aktiengesellschaft Relaying in a telecommunications system based on code and time-division multiplex

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