WO2018082779A1 - Auto-configuration de paramètres de réseau local dans un enodeb pour interfonctionnement entre réseau local et réseau cellulaire - Google Patents

Auto-configuration de paramètres de réseau local dans un enodeb pour interfonctionnement entre réseau local et réseau cellulaire Download PDF

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Publication number
WO2018082779A1
WO2018082779A1 PCT/EP2016/076649 EP2016076649W WO2018082779A1 WO 2018082779 A1 WO2018082779 A1 WO 2018082779A1 EP 2016076649 W EP2016076649 W EP 2016076649W WO 2018082779 A1 WO2018082779 A1 WO 2018082779A1
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WO
WIPO (PCT)
Prior art keywords
network
configuration information
network element
manager entity
memory
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Application number
PCT/EP2016/076649
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English (en)
Inventor
Muhammad NASEER-UL-ISLAM
Stephen MWANJE
Janne Tapio ALI-TOLPPA
Richard Waldhauser
Olaf Pollakowski
Guillaume DECARREAU
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Nokia Technologies Oy
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Priority to PCT/EP2016/076649 priority Critical patent/WO2018082779A1/fr
Publication of WO2018082779A1 publication Critical patent/WO2018082779A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H04L41/0806—Configuration setting for initial configuration or provisioning, e.g. plug-and-play
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/085—Retrieval of network configuration; Tracking network configuration history
    • H04L41/0853—Retrieval of network configuration; Tracking network configuration history by actively collecting configuration information or by backing up configuration information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0876—Aspects of the degree of configuration automation
    • H04L41/0886—Fully automatic configuration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H04W76/16—Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/02—Inter-networking arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

Definitions

  • the present invention relates to auto-configuration of local network parameters in an eNodeB for cellular network-local network interworking, in particular 3GPP-WLAN interworking.
  • a communication system e.g. an eNodeB
  • a logical node e.g. a WT
  • APs access points
  • WLAN- APs local network
  • the network element only receives access point identifiers from UE reports and does not know the corresponding logical node.
  • At least one embodiment of the invention addresses the problem of identifying, at a network element of a radio access network of a cellular communication system, a logical node of a local network for a newly discovered access point of the local network, and acquiring configuration information allowing the network element to set up an interface to the logical node and operate network interworking/aggregation.
  • a network managing system of a cellular communication system is used as an interface between the cellular communication system and a local network, and an interface between an element manager entity of a network element of a radio access network of the cellular communication system and a network manager entity of the network management system is used to provide mapping from an identifier of an access point of a local network, reported by a UE, to a corresponding logical node of the local network, which controls the access point, and to auto-configure required parameters of the logical node at the network element.
  • a 3GPP network manager is used as an interface between 3GPP and WLAN, and an interface Itf-N between an element manager of an eNB and the 3GPP network manager is used to provide mapping from a BSSI D of a WLAN-AP reported by a UE to a corresponding WT which controls the WLAN- AP, and to auto-configure required parameters of the WT at the eNB.
  • At least some embodiments and implementation examples of the invention provide an extendable automated procedure to the network element, e.g. eNB, to acquire configuration information of an unknown logical node, e.g. WT, responsible for a newly discovered identifier, e.g. BSSID.
  • the configuration of the logical node, e.g. WT supports establishing a direct interface, e.g. an Xw interface, between the network element and the logical node, and successfully operating interworking features of the local network, e.g. WLAN.
  • a point to note is that there may be some delay between the identification of the new BSSID and the establishment of the Xw interface as the eNB needs to acquire the required information from the NM system. However, as the UE can still be connected to the 3GPP network, there will be no severe impact of this delay. Acquisition of the required information from the NM system may be done only once for all access points under a single logical node. According to an embodiment of the invention, this is achieved by receiving, in the configuration information, a list of identifiers of the access points controlled by the logical node acquired based on the newly
  • the network element e.g. eNB
  • the network element can request the logical node, e.g. WT, directly via the Xw for all the other supported BSSIDs.
  • Fig. 1 shows a schematic block diagram illustrating an architecture for RAN level WLAN interworking, in which at least some embodiment of the invention are implementable.
  • Fig.2 shows a flow chart illustrating a process 1 of acquiring configuration information for setting up an interface between a network element of a radio access network of a cellular communication system and a logical node of a local network, according to an embodiment of the invention.
  • Fig.3 shows a flow chart illustrating a process 2 of acquiring configuration information for setting up the interface between the network element of the radio access network and the logical node of the local network, according to an embodiment of the invention.
  • Fig.4 shows a schematic block diagram illustrating a configuration of control units in which examples of embodiments of the invention are implementable.
  • Fig.5 shows a diagram illustrating communication between a radio access network and a network managing system for setting up the interface between the radio access network and the local network, according to an embodiment of the invention.
  • Fig.6 shows a signaling diagram illustrating notification-configuration message exchange for setting up the interface between the radio access network of the cellular communication system and the local network, according to an implementation example of the invention.
  • Fig. 1 shows a schematic block diagram illustrating an architecture for RAN level WLAN interworking, in which at least some embodiments of the invention are implementable.
  • RCLWI Radio Controlled LTE-WLAN interworking
  • LWA LTE-WLAN Aggregation
  • Xw interface comprises a control plane (Xw-C) and user plane (Xw-U).
  • Xw-U is established using LWA specific signaling via the Xw-C.
  • the Xw-U and LWA specific functions like e.g. flow control, are not part of RCLWI.
  • a WT is a logical node and 3GPP does not specify where it is implemented, so it may for example be implemented in an AP or at another entity that may be capable of controlling one or more AP(s). Therefore, a WT on WLAN side may be connected to one or more WLAN Access Points (APs).
  • a WT provides the WLAN-side Xw termination functionality for the interworking eNB.
  • the Xw interface allows for the exchange of information between eNB and WT for the successful interworking operation.
  • Figs.2 and 3 show flowcharts illustrating processes 1 and 2 of acquiring configuration information for setting up an interface, e.g. the Xw interface, between a network element of a radio access network of a cellular communication system, e.g. the eNB, and a logical node of a local network, e.g. the WT, according to an embodiment of the invention.
  • step S21 of process 1 the network element checks whether configuration information of a logical node of the local network, which controls the access point, is available at the network element. In case the configuration information is not available at the network element, in step S22 the network element acquires the configuration information of the logical node based on an identifier of the access point from a network management system of the cellular communication system, e.g. the OAM shown in Fig. 1.
  • a network management system of the cellular communication system e.g. the OAM shown in Fig. 1.
  • the network management system comprises a memory which holds mapping information between identifiers of access points of local networks and configuration information of logical nodes of the local networks.
  • the network management system e.g. a network manager entity of the network management system, receives a notification including an identifier of an access point of a local network from a network element of a radio access network of the cellular communication system.
  • the network management system searches the memory based on the identifier for configuration information of a logical node which controls the access point.
  • the network management system returns the configuration information to the network element of the radio access network.
  • the network element sets up a direct interface between the network element and the logical node based on the configuration information.
  • the network element acquires the configuration information of the logical node from the network management system via an interface, e.g. an Itf-N, between an element manager entity of the network element and a network manager entity of the network management system.
  • an interface e.g. an Itf-N
  • step S22 of process 1 the network element informs the network management system about the identifier of the access point using a notification mechanism of the interface between the element manager entity and the network manager entity, and acquires the configuration information through a bulk/basic configuration management mechanism of the interface between the element manager entity and the network manager entity.
  • the network management system initiates a process to receive the configuration information from the local network.
  • the configuration information may comprising at least one of an IP address of the logical node, flow control parameters, and a list of identifiers of access points controlled by the logical node.
  • the network element of the radio access network stores mapping information between identifiers of access points of the local network and configuration information of logical nodes received from t e network management system, e.g. based on the list of identifiers received from the network management system.
  • Fig.4 shows a schematic block diagram illustrating a configuration of control units 10 and 20 in which examples of embodiments of the invention are implementable.
  • the control unit 10 comprises processing resources (e.g. processing circuitry and/or processing software) 11, memory resources (memory circuitry) 12 and interfaces (interface circuitry) 13, connected via a bus 14.
  • processing resources e.g. processing circuitry and/or processing software
  • memory resources memory circuitry
  • interfaces interface circuitry
  • control unit 20 comprises processing resources (e.g.
  • processing circuitry and/or processing software 21, memory resources (memory circuitry) 22 and interfaces (interface circuitry) 23, connected via a bus 24.
  • the control unit 10 may be part of and/or used by a network element of a radio access network of a cellular communication system, e.g. an eNB, which carries out process 1 of Fig.2.
  • a network element of a radio access network of a cellular communication system e.g. an eNB, which carries out process 1 of Fig.2.
  • the control unit 20 may be part of and/or used by a network management system of the cellular communication system, which carries out process 2 of Fig.3.
  • control units 10 and 20 communicate with each other via their interfaces using a connection 44, e.g. an Itf-N.
  • Fig.5 illustrates a high level workflow according to this embodiment of the invention.
  • the eNB configures UEs to report any WLAN AP from partner WLAN networks.
  • the eNB configures UEs to report any WLAN AP from partner WLAN networks.
  • WLAN IDs including but not limited to e.g. SSID, HESSID, BSSID, etc.
  • a UE In communication "2" in Fig.5, if a UE observes an AP from the configured partner WLAN networks, by either reading the AP's beacon signal or asking the AP for its BSSI D, it reports that BSSI D to the serving eNB.
  • the eNB In communication "3" in Fig.5, in case the eNB does not have the corresponding WT mapping for this BSSI D, it triggers a WLAN WT discovery procedure in order to receive the necessary configuration from the NM for setting up the RCLWI/LWA.
  • the NM finds connection information (also referred to as configuration information) of a WT that is managing the WLAN AP and returns the configuration information required for setting up and configuring the Xw interface in the eNB.
  • the eNB Using the configuration information received in communication "4", the eNB initiates the Xw interface setup to the WT and configures the Xw.
  • the implementation example of the invention uses asynchronous
  • an eNB detects a WLAN BSSI D for which it does not have a mapping to a corresponding WT/Xw, it informs the NM system via its EM about the newly detected BSSID, using the "Notification" mechanism of Itf- N.
  • the NM system Upon reception of this notification from the eNB, the NM system is able to look for the corresponding WT for this BSSI D as given by the WLAN network and inform the eNB about the corresponding WT's configuration details through the "Bulk/Basic Configuration Management" mechanism of Itf-N.
  • step 1 the eNB configures a UE to report any WLAN AP from a partner WLAN network, similarly to communication "1" in Fig.5.
  • step 2a the UE observes APs from the configured partner WLAN network, by either reading the AP's beacon signal or asking the AP for its BSSI D, and in step 2b, if the UE observes an AP from the configured partner WLAN networks, it reports that BSSID to the serving eNB, similarly to communication "2" in Fig.5.
  • step 3a the eNB checks if it already has a WT mapping for this BSSID e.g. from an earlier request to NM for a neighboring BSSID.
  • Step 3a is based on step S21 in Fig.2.
  • step 3b if the eNB does not already have a mapping for the reported BSSI D, it asks the NM to provide the details of the relevant WT for this BSSID via the Itf-N. Step 3b is based on step S22 in Fig.2.
  • step 4a the NM looks for the WT corresponding to the reported new BSSID as provided by the WLAN network. If not identified, the NM can initiate a parallel process to get the required information from the WLAN network. Step 4a is based on step S32 in Fig.3. In step 4b, if the WT is identified, the NM sends back (to the eNB via the Itf-N) the configuration details (also referred to as configuration
  • Step 4b is based on step S33 in Fig.3.
  • step 5 using the configuration information received in step 4b, the eNB initiates the Xw interface setup to the WT and configures the Xw.
  • the Itf-N between the eNB and its NM system in the 3GPP network is used.
  • Itf-N (specifically the Alarm and Kernel CM I RPs) is extended and proper messages are defined.
  • Respective sub processes may be implemented in Fig.6 as follows:
  • Each WT provides a termination for multiple BSSI Ds.
  • the eNB when a WT is configured in an eNB, the eNB is provided with a list of all the BSSIDs that are supported by that WT. The eNB keeps this list of BSSIDs since they are expected to be within its vicinity and as such may need to be added as neighbor WLAN APs.
  • the eNB identifies the corresponding WT and initiates the required configuration using the existing Xw to the WT.
  • Each WLAN AP represents a neighbor Managed Object (MO) of the eNB for which particular attributes need to be tracked.
  • attributes include the WT IP address and the flow control parameters.
  • WT IP address As soon as a BSSID is identified by UE, a corresponding WT is created at the eNB for the BSSID. Since its WT attributes are missing, that can be interpreted as a database inconsistency alarm at the eNB. Consequently the eNB will raise a database inconsistency alarm to the EM and subsequently to the NM.
  • steps 3a and 3b are implemented as follows:
  • WLAN_Neighbor_AP is added as a MO of the eNB Network Resource Model (NRM) created for each observed BSSID. Then for the new BSSID, the MO is created using a "createMO" operation of the Bulk/Basic CM mechanism of the EM.
  • NEM Network Resource Model
  • MO attributes for this object are added to match the different configuration parameters required for each AP.
  • a specific alarm is added in the eNB alarm list.
  • the specific alarm may be named "WLAN AP MO_Attributes_Missing" of alarm type database inconsistency.
  • eNB raises the alarm as soon as the MO (WLAN_Neighbor_AP) is created but with attributes not fully configured. Alarm is sent to the NM as "Alarm IRP Notification”.
  • the NM is assumed to have been synchronized a priori with the WLAN network, i.e., the NM already has a list of the BSSID-WT mapping for all partner WLANs. As such NM looks through this list to identify the appropriate BSSI D-WT mapping. If not identified, however, the NM may initiate a parallel process to get the required information from the WLAN network. This could, for example, be done for the case where the NM is synchronized via a permanent Itf-N with the WLAN NM or where the same NM manages both the 3GPP and WLAN networks as may be the case for a single operator for both networks.
  • the NM may configure the corresponding eNB's MO via the Bulk/ Basic Configuration Management mechanisms. Since the MO has already been added to the eNB NRM with the appropriate attributes fields, the NM may configure the MO using the "setMO attributes" operation of the Bulk/Basic CM mechanism with the MO given as the WLAN AP.
  • the configuration details (also referred to as configuration information) reported by the NM system to the eNB include the WT's IP address for the Xw interface termination and the flow control capability supported by the APs controlled by this WT. It may, however, also include any other WT related parameter, which the NM system finds useful for optimal operation of the WLAN interworking, and which the eNB cannot access via the Xw interface.
  • the granularity of such configuration parameters, except the WT's IP address, could be at the WT level or even at the AP level, in which case the AP-specific parameters are separately communicated.
  • a network element of a radio access network of a cellular communication system comprises and/or uses the control unit 10 shown in Fig.4.
  • the network element comprises means for, for performing interworking between the network element and an access point of a local network, checking whether configuration information of a logical node of the local network, which controls the access point, is available at the network element, and means for, in case the configuration information is not available at the network element, acquiring the configuration information of the logical node based on an identifier of the access point from a network management system of the cellular communication system.
  • the network element comprises means for, for performing the interworking, in case the configuration information is available at the network element, setting up a direct interface between the network element and the logical node based on the configuration information.
  • the network element comprises means for acquiring the configuration information of the logical node from the network management system via an interface between an element manager entity of the network element and a network manager entity of the network management system.
  • the network element comprises means for informing the network management system about the identifier of the access point using a notification mechanism of the interface between the element manager entity and the network manager entity, and means for acquiring the configuration information through a bulk/basic configuration management mechanism of the interface between the element manager entity and the network manager entity.
  • the network element comprises means for storing mapping information between identifiers of access points of the local network and configuration
  • the means of the network element are implemented by the processing resources 11 , memory resources 12 and interfaces 13.
  • an apparatus of a network management system of a cellular communication system comprising a memory which holds mapping information between identifiers of access points of local networks and configuration information of logical nodes of the local networks.
  • the apparatus comprises and/or uses the control unit 20 shown in Fig.4.
  • the apparatus comprises means for receiving a notification including an identifier of an access point of a local network from a network element of a radio access network of the cellular communication system, means for searching the memory based on the identifier for configuration information of a logical node which controls the access point, and means for returning the configuration information to the network element of the radio access network.
  • the apparatus comprises means for, in case the configuration information is not found in the memory, initiating a process to receive the configuration information from the local network.
  • the apparatus comprises means for returning the configuration information of the logical node to the network element via an interface between an element manager entity of the network element and a network manager entity of the network management system.
  • the apparatus comprises the network manager entity.
  • the apparatus comprises means for receiving the notification through a notification mechanism of the interface between the element manager entity and the network manager entity, and means for returning the configuration information using a bulk/basic configuration management mechanism of the interface between the element manager entity and the network manager entity.
  • the means of the apparatus are implemented by the processing resources 21 , memory resources 22 and interfaces 23.
  • the configuration information comprises at least one of an IP address of the logical node, flow control parameters, and a list of identifiers of access points controlled by the logical node
  • the cellular communication system comprises a third generation partnership project (3GPP) network
  • the local network comprises a wireless local area network (WLAN)
  • the network element comprises an eNodeB.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Automation & Control Theory (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon l'invention, pour réaliser un interfonctionnement entre un élément de réseau d'un réseau d'accès radio d'un système de communication cellulaire et un point d'accès d'un réseau local, dans le cas où des informations de configuration d'un nœud logique du réseau local, qui commande le point d'accès, ne sont pas disponibles (3a) au niveau de l'élément de réseau, l'élément de réseau acquiert (3b, 4b) les informations de configuration du nœud logique en fonction d'un identifiant du point d'accès auprès d'un système de gestion de réseau du système de communication cellulaire.
PCT/EP2016/076649 2016-11-04 2016-11-04 Auto-configuration de paramètres de réseau local dans un enodeb pour interfonctionnement entre réseau local et réseau cellulaire WO2018082779A1 (fr)

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PCT/EP2016/076649 WO2018082779A1 (fr) 2016-11-04 2016-11-04 Auto-configuration de paramètres de réseau local dans un enodeb pour interfonctionnement entre réseau local et réseau cellulaire

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PCT/EP2016/076649 WO2018082779A1 (fr) 2016-11-04 2016-11-04 Auto-configuration de paramètres de réseau local dans un enodeb pour interfonctionnement entre réseau local et réseau cellulaire

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Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
CATT: "Discussion on ANR for LWA", vol. RAN WG3, no. Bangalore, India; 20160411 - 20160415, 1 April 2016 (2016-04-01), XP051082826, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG3_Iu/TSGR3_91bis/Docs/> [retrieved on 20160401] *
ERICSSON: "The Importance of WT Address Look-Up", vol. RAN WG3, no. Budapest, HU; 20160120 - 20160122, 11 January 2016 (2016-01-11), XP051067040, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG3_Iu/TSGR3_AHGs/R3_AHG_NB-IOT/Docs/> [retrieved on 20160111] *
INTEL CORPORATION: "ANR aspects of LWA", vol. RAN WG2, no. Dubrovnik, Croatia; 20160411 - 20160415, 2 April 2016 (2016-04-02), XP051082421, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG2_RL2/TSGR2_93bis/Docs/> [retrieved on 20160402] *
NEC: "Automatic Neighbour Relation for LWA", vol. RAN WG3, no. Nanjing, P.R. China; 20160523 - 20160527, 22 May 2016 (2016-05-22), XP051105985, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN3/Docs/> [retrieved on 20160522] *
NOKIA NETWORKS: "WT address look-up for automated Xw-C Setup", vol. RAN WG3, no. Budapest, HU; 20160120 - 20160122, 11 January 2016 (2016-01-11), XP051067030, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG3_Iu/TSGR3_AHGs/R3_AHG_NB-IOT/Docs/> [retrieved on 20160111] *
NUGGEHALLI PAVAN: "LTE-WLAN aggregation [Industry Perspectives]", IEEE WIRELESS COMMUNICATIONS, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 23, no. 4, 1 August 2016 (2016-08-01), pages 4 - 6, XP011621032, ISSN: 1536-1284, [retrieved on 20160825], DOI: 10.1109/MWC.2016.7553017 *

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