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WO2012163752A1 - Signalement des informations de femtocellules voisines à l'aide de rapports de relations voisines automatiques - Google Patents

Signalement des informations de femtocellules voisines à l'aide de rapports de relations voisines automatiques Download PDF

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Publication number
WO2012163752A1
WO2012163752A1 PCT/EP2012/059568 EP2012059568W WO2012163752A1 WO 2012163752 A1 WO2012163752 A1 WO 2012163752A1 EP 2012059568 W EP2012059568 W EP 2012059568W WO 2012163752 A1 WO2012163752 A1 WO 2012163752A1
Authority
WO
WIPO (PCT)
Prior art keywords
neighbour cell
report
neighbour
network node
measured
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/EP2012/059568
Other languages
English (en)
Inventor
Hanns Juergen Schwarzbauer
Alexander Vesely
Karol Drazynski
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.)
Nokia Solutions and Networks Oy
Original Assignee
Nokia Siemens Networks Oy
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 Nokia Siemens Networks Oy filed Critical Nokia Siemens Networks Oy
Priority to EP12722165.3A priority Critical patent/EP2716100A1/fr
Publication of WO2012163752A1 publication Critical patent/WO2012163752A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Definitions

  • the invention generally relates to reporting of neighbour cell information. More particularly, the invention
  • HNBs Home Node Bs
  • NCLs Automatic Neighbor
  • ANR functions using the mobile device or user equipment (UE) .
  • UE user equipment
  • a UE ANR log contains not just an entry for one cell, but rather many entries since the start of logging the ANRs by the UE .
  • Each entry reports neighbour cell relations for all cells which the UE has traversed since it started logging the ANRs. If the UE is attached to a HNB cell, it typically reports only HNB cells neighbouring to the attached HNB-cell.
  • the UE under configurable conditions, reads relevant system information broadcasted by cells neighbouring the cell currently serving the UE .
  • the UE then stores the neighbour cell information internally and reports the collected information at a later point in time to a network control node; i.e. a radio network controller
  • RNC Radio Network Controller
  • HNB-GW Home Node B gateway
  • the HNB In order to allow a larger (campus or corporate) 3G HNB network to operate without detailed pre-configuration of the respective HNB neighbour relations, the HNB would have the possibility to scan its environment and request Iurh-connectivity towards its neighbour HNB.
  • a further problem is that a macro cell is not concerned about receiving UE ANR logbook entries containing
  • the invention seeks to solve at least some of the
  • embodiments of the invention provide a method, which includes measuring a neighbour cell at a subscriber station, reporting the measured neighbour cell to a first network node, forwarding a report of the measured neighbour cell from the network node to a control node, and sending the neighbour cell report from the control node to a second network node associated with the neighbour cell included in the measured neighbour cell report.
  • a neighbour cell is measured at a subscriber station in a communications network.
  • the measured neighbour cell is reported to a first network node, then the first network node forwards the report of the measured neighbour cell node to a control node.
  • the control node then sends the neighbour cell report to a second network node associated with the neighbour cell that was measured by the
  • the control node can receive and align measured neighbour cell information with its configuration, which results in improved network quality, continued service quality during HO due to actual and up to date neighbour cell information, as well as improved HO behaviour with reduced HO failure due to missing or outdated neighbour cell information.
  • a further advantage is that efforts, costs and drive tests to verify network deployment are reduced due to simplified and more efficient measurement and reporting of information about neighbour cells.
  • This provides the benefit of adding new cells into the network without prior planning and prior synchronisation with other control nodes.
  • the method further includes evaluating the neighbour cell report at the control node and, based on a result of the evaluation, sending the report only to network nodes associated with cells included in the neighbour cell report. This provides the advantage that non-neighbour cells do not receive unnecessary
  • the neighbour report may also be sent to a network node serving a cell in which the subscriber station is
  • This network node may be the same as the first network node.
  • the method may further include storing measurement information in an Automatic Neighbour Relation log at the subscriber station.
  • a memory in the subscriber station may store the neighbour cell measurement in an Automatic Neighbour Relation log, which contains entries of
  • An instruction may be sent to the first network node to set up an interface with the second network node
  • the control node may send an instruction to the first network node to set up an interface (e.g. an Iurh interface) with the second control node so that they may communicate with each other and exchange neighbour cell information.
  • an interface e.g. an Iurh interface
  • control node may instruct the first network node that it is allowed to exchange signalling with second network node in the reported neighbour cell.
  • the first network node evaluates the measured neighbour cell report for a new neighbour cell and updates a neighbour cell list with reported parameters from the neighbour cell report.
  • identifier may be added to the neighbour cell report.
  • the first control node may add the ANR log identifier to the neighbour cell report before sending it to the control node. Then the network node can also add a list of network nodes through which the Automatic Neighbour Relation log has already passed to the neighbour cell report. In this way, the control node does not have to send unnecessary neighbour relation information to cells that already have this information.
  • the neighbour cell report may also be sent to a second control node corresponding to the reported measured neighbour cell.
  • the second control node may be
  • the neighbour cell report may either be sent to the second control node via an Iur interface or via a core network.
  • the subscriber station includes a measurement unit configured to measure a neighbour cell, and a transmitter unit configured to send a report of the measured neighbour cell to a network node.
  • the subscriber station further includes a data storage unit configured to store measurement
  • Additional embodiments of the invention provide a network node, which includes a receiver unit configured to receive a report of a measured neighbour cell from a subscriber station, and a transmitter unit configured to forward the report of the measured neighbour cell to a control node.
  • the network node may further include a processor, which is configured to evaluate the measured neighbour cell report for a new neighbour cell and configured to update a neighbour cell list with reported parameters from the neighbour cell report.
  • the processor may be further configured to add an Automatic Neighbour Relation log identifier to the neighbour cell report.
  • the processor may be configured to add a list of network nodes through which the Automatic Neighbour Relation log has already passed to the neighbour cell report. Further embodiments of the invention provide a control node.
  • the control node includes a receiver unit
  • a transmitter unit configured to send the report to a second network node associated with a neighbour cell included in the measured neighbour cell report.
  • control node further includes a processor configured to evaluate the neighbour cell report. Based on a result of the evaluation, the transmitter unit is then configured to send the report only to network nodes associated with cells included in the neighbour cell report. In this way, cells that are not neighbour cells do not receive unnecessary information.
  • the control node reports an actual measured neighbour cell relationship to a communications network, which can be used to update a neighbour cell list, thereby
  • the control node can receive and align measured neighbour cell information with its configuration, which results in improved network quality, continued service quality during HO due to actual and up to date neighbour cell information, as well as improved HO behaviour with reduced HO failure due to missing or outdated neighbour cell information.
  • the control node may be a radio network controller (RNC) or a home Node B gateway (HNB-GW) , for example.
  • RNC radio network controller
  • HNB-GW home Node B gateway
  • Embodiments of the invention further provide a computer program product including a program comprising software code portions being arranged, when run on a processor, to perform: measuring a neighbour cell at a subscriber station; reporting the measured neighbour cell to a first network node; forwarding a report of the measured
  • neighbour cell from the network node to a control node; and sending the neighbour cell report from the control node to a second network node associated with the
  • the computer program product includes a computer-readable medium on which the software code portions are stored, and/or wherein the program is directly loadable into a memory of the processor.
  • Figure 1 is a simplified schematic diagram of a
  • Figure 2 is a simplified schematic diagram of a
  • Figure 3 is a simplified schematic diagram of a network node according to an embodiment of the invention.
  • FIG. 4 is a simplified schematic diagram of a control node according to an embodiment of the invention.
  • Figure 5 is a flow chart illustrating a method according to an embodiment of the invention.
  • Figure 1 shows a wireless communications network, which in this example is a UMTS network: however, the following embodiments may be applicable to any wireless
  • communications network for example an LTE network.
  • the network includes two macro cells Ml and M2, which are part of the radio access network (RAN) part of the communications network and are coupled to the core network (CN) part of the communications network.
  • RAN radio access network
  • CN core network
  • the macro cell Ml includes femto cells Fl, F2 and F3, which can be accessed via the home Node Bs (HNBs) 1, 2 and 3, respectively.
  • the HNBs 1, 2 and 3 are controlled by a home Node B gateway (HNB-GW) 20, to which they are connected via an Iuh interface.
  • the HNBs 1, 2 and 3 can communicate with each other over an Iurh interface, which may be a direct interface or may be proxied via the HNB-
  • the HNB-GW 20 is coupled to the CN via standard Iu-cs and Iu-ps interfaces.
  • the macro cell M2 is a neighbour cell to the macro cell Ml and is controlled by a radio network controller (RNC)
  • RNC radio network controller
  • a Node B 5 is controlled by the RNC 4 and provides access to the macro cell M2.
  • a user equipment (UE) 10 is a subscriber station to the network including the macro cells Ml and M2 and is also in the closed subscriber group (CSG) of the femto network, which includes the cells Fl, F2 and F3.
  • CSG closed subscriber group
  • Handover may take place between the HNBs 1, 2 and 3 via the HNB-HNB Iurh interface, which is able to support all functions defined for RNSAP (as defined in 3GPP TS).
  • the protocol stack of the lurh interface is basically the same as the Iur interface, except that SCCP is replaced by RNA (a new adaptation layer) over SCTP.
  • lurh connectivity is either a direct one as illustrated in Figure 1 (lurh signalling traffic is not at all touched by the HNB-GW 20 and each HNB 1, 2, 3 has to have a lurh connection to all its neighbouring HNBs 1, 2, 3) or a HNB-GW routed one (each HNB 1, 2, 3 is lurh
  • HNB-GW 20 connected to the HNB-GW 20 with a single lurh interface instance and manages all respective lurh signalling via this single lurh interface) .
  • means are provided to prevent lurh signalling between HNBs 1, 2, 3 that are not neighbours or do not yet know each other to be neighbours.
  • a method according to the invention provides that the HNB 1, 2, 3, finally receiving the logbook report of the UE 10, shall communicate the logbook entry towards the HNB-GW (either already
  • HNB-GW 20 providing connectivity information (identity of the HNB 1, 2, 3 and signalling transport addresses for lurh signalling) to the relevant HNBs 1, 2, 3 using the Iuh interface.
  • Figure 2 shows the UE 10 in more detail.
  • the serving cell for the UE 10 is the femto cell Fl .
  • the UE 10 includes a transmit/receive unit 11, and a measurement unit 12, which is configured to measure received signal strength in order to determine a
  • a data storage unit 13 is
  • a processor 14 is included in the UE 10, which can run software to cause the measurement unit 12 to perform the relevant neighbour cell measurements and to cause the transmit/receive unit 11 to forward a report of the neighbour cell measurements to the serving HNB 1, which is shown in more detail in Figure 3: however, all of the HNBs 1, 2 and 3 in the femto network have the same structure and function as each other.
  • ANR Automatic Neighbour Relation
  • the HNB 1 includes a transmitter 15, a receiver 16 and a processor 17 and is controlled by the HNB-GW 20 over the Iuh interface.
  • the HNB-GW 20 is shown in Figure 4 and also includes a transmitter 21, a receiver 22 and a processor 23.
  • the UE 10 is currently served by the femto cell Fl accessed by the HNB 1 but the transmit/receive unit 11 may also receive signals from other cells in the network (both femto and macro cells) .
  • the measurement unit 12 in the UE 10 measures a neighbour cell that could be used for handover, for example F2.
  • the UE 10 may then store the measured neighbour cell F2 in an Automatic Neighbour Relation log contained in its data storage unit 13.
  • transmit/receive unit 11 then sends a report of the measured neighbour cell to the HNB 1 in step S2 and the receiver 16 receives the neighbour cell report.
  • the HNB 1 is just used here as an example - the UE 10 may send a report of the measured neighbour cell to any of the femto cells in the network) .
  • the transmitter 15 of the HNB 1 then forwards the report of the measured neighbour to the HNB-GW 20, where it is received by the receiver 22.
  • the HNB-GW sends the neighbour cell report to the HNB 2, which is the HNB associated with the neighbour cell F2 included in the measured neighbour cell report.
  • the HNB-GW 20 then either causes or instructs the HNB 1 or the HNB 2 to setup a direct Iurh interface or informs them that they are neighbours and that Iurh signalling between them is allowed (if they have already an Iurh connection setup towards the HNB-GW 20, otherwise the HNB 20 causes one or both of the HNBs 1, 2 to setup this Iurh interface to the HNB-GW 20.
  • the HNB 1, 2 or 3 to which the UE 10 sends the neighbour cell measurement report, evaluates the measured neighbour cell report at the processor 17 to determine whether the report contains a measurement of a new neighbour cell. The processor 17 can then update a neighbour cell list accordingly with reported parameters from the neighbour cell report.
  • the HNB 1, 2, 3 receiving the neighbour cell measurement report can also add an Automatic Neighbour Relation log identifier and/or a list of HNBs through which the
  • the HNB-GW 20 evaluates the neighbour cell report and then sends the report only to HNBs associated with cells included in the report.
  • the HNB-GW 20 also sends the neighbour cell report to that particular control node controlling the measured neighbour cell (s) .
  • the UE 10 may have measured the macro cell M2 as being a neighbour cell.
  • the HNB-GW 20 will send the neighbour cell report to the RNC 4.
  • the HNB-GW 20 can either send the neighbour cell report to the RNC 4 (or any other relevant control node) via an Iur interface or via the core network.
  • means are provided to inform the UE 10 whether it shall read system information from cells served by a HNB 1, 2, 3 or if it shall read information from CSG-cells in order to avoid that
  • HNB/CSG-cell related information is reported to macro network nodes.
  • the UE 10 has to be able to read HNB/CSG-cell relevant system information (such as the CSG-Identity and the cell-access-mode) and to report this information to the proper RAN node.
  • the macro-RNC 4 is enabled to forward HNB/CSG relevant information towards the HNB-GW 20 in order to allow for mixed macro/femto deployment where, for example, macro cells serve as an "umbrella layer" for HNB/CSG-networks .
  • any method step is suitable to be
  • CMOS Complementary MOS
  • BiMOS Bipolar MOS
  • BiCMOS Bipolar CMOS
  • ECL emitter Coupled Logic
  • TTL Transistor-Transistor Logic
  • FPGA Field-programmable Gate
  • CPLD Complex Programmable Logic Device
  • DSP Digital Signal Processor
  • apparatuses and network devices can be implemented as individual devices, units or means, but this does not exclude that they are implemented in a distributed fashion throughout the system, as long as the functionality of the device, unit or means is preserved;
  • an apparatus may be represented by a semiconductor chip, a chipset, or a (hardware) module comprising such chip or chipset; this, however, does not exclude the possibility that a functionality of an apparatus or module, instead of being hardware implemented, be
  • a (software) module such as a computer program or a computer program product comprising executable software code portions for execution/being run on a processor
  • a device may be regarded as an apparatus or as an assembly of more than one apparatus, whether functionally in cooperation with each other or functionally independently of each other but in a same device housing, for example.
  • respective functional blocks or elements according to above-described aspects can be implemented by any known means, either in hardware and/or software, respectively, if it is only adapted to perform the described functions of the respective parts.
  • the mentioned method steps can be realized in individual functional blocks or by individual devices, or one or more of the method steps can be realized in a single functional block or by a single device.
  • any method step is suitable to be implemented as software or by hardware without changing the idea of the present invention.
  • Devices and means can be
  • UE user equipment
  • mobile station may refer to any mobile or stationary device including a mobile telephone, a computer, a mobile broadband adapter, a USB stick for enabling a device to access to a mobile network, etc.
  • UE user equipment
  • mobile broadband adapter a mobile broadband adapter
  • USB stick for enabling a device to access to a mobile network

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

Abstract

Selon l'invention, une cellule voisine est mesurée au niveau d'une station d'abonné. La cellule voisine mesurée est signalée à un premier nœud de réseau et le rapport de la cellule voisine mesurée est transféré du premier nœud de réseau à un nœud de commande. Le rapport de cellule voisine est envoyé du nœud de commande à un second nœud de réseau associé à la cellule voisine contenue dans le rapport de la cellule voisine mesurée.
PCT/EP2012/059568 2011-05-30 2012-05-23 Signalement des informations de femtocellules voisines à l'aide de rapports de relations voisines automatiques Ceased WO2012163752A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12722165.3A EP2716100A1 (fr) 2011-05-30 2012-05-23 Signalement des informations de femtocellules voisines à l'aide de rapports de relations voisines automatiques

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EPPCT/EP2011/058831 2011-05-30
EP2011058831 2011-05-30

Publications (1)

Publication Number Publication Date
WO2012163752A1 true WO2012163752A1 (fr) 2012-12-06

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Family Applications (1)

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PCT/EP2012/059568 Ceased WO2012163752A1 (fr) 2011-05-30 2012-05-23 Signalement des informations de femtocellules voisines à l'aide de rapports de relations voisines automatiques

Country Status (1)

Country Link
WO (1) WO2012163752A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015003019A1 (fr) * 2013-07-01 2015-01-08 Qualcomm Incorporated Mesure inter-technologie d'accès radio pendant un transfert td-scdma
WO2016096558A1 (fr) * 2014-12-17 2016-06-23 Nokia Solutions And Networks Oy Mesure de cellules voisines par un équipement utilisateur desservi par un nœud d'accès radio maître et un nœud d'accès radio secondaire

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2214434A1 (fr) * 2009-01-30 2010-08-04 Alcatel Lucent Découverte de cellules femto voisines

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2214434A1 (fr) * 2009-01-30 2010-08-04 Alcatel Lucent Découverte de cellules femto voisines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NOKIA SIEMENS NETWORKS: "Text Poposal for TS25.484 (RAN3 part)", 3GPP DRAFT; R3-111620, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG3, no. Barcelona, Spain; 20110509, 12 May 2011 (2011-05-12), XP050498812 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015003019A1 (fr) * 2013-07-01 2015-01-08 Qualcomm Incorporated Mesure inter-technologie d'accès radio pendant un transfert td-scdma
WO2016096558A1 (fr) * 2014-12-17 2016-06-23 Nokia Solutions And Networks Oy Mesure de cellules voisines par un équipement utilisateur desservi par un nœud d'accès radio maître et un nœud d'accès radio secondaire

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