EP2883379A1 - Événements de déclenchement de rapports de mesure améliorés utilisant les informations de mobilité pour des réseaux hétérogènes - Google Patents
Événements de déclenchement de rapports de mesure améliorés utilisant les informations de mobilité pour des réseaux hétérogènesInfo
- Publication number
- EP2883379A1 EP2883379A1 EP12751039.4A EP12751039A EP2883379A1 EP 2883379 A1 EP2883379 A1 EP 2883379A1 EP 12751039 A EP12751039 A EP 12751039A EP 2883379 A1 EP2883379 A1 EP 2883379A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- measurement
- trigger
- parameter
- measurement trigger
- event
- 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.)
- Withdrawn
Links
- 238000005259 measurement Methods 0.000 title claims abstract description 279
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000004590 computer program Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 2
- 230000037230 mobility Effects 0.000 claims 12
- NQLVQOSNDJXLKG-UHFFFAOYSA-N prosulfocarb Chemical compound CCCN(CCC)C(=O)SCC1=CC=CC=C1 NQLVQOSNDJXLKG-UHFFFAOYSA-N 0.000 claims 1
- 230000006870 function Effects 0.000 abstract description 5
- 230000000875 corresponding effect Effects 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 12
- 230000001419 dependent effect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000001413 cellular effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
- H04W36/0088—Scheduling hand-off measurements
-
- 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
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
- H04W36/324—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by mobility data, e.g. speed data
-
- 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 present invention relates to apparatuses, methods and a computer program product for achieving enhanced measurement report trigger events using mobility information for heterogeneous networks.
- E-UTRAN Evolved-Universal Terrestrial Radio Access Network
- Embodiments of the present invention relates to enhancement of measurement reporting trigger events and handovers in multi-layer cellular network, where users are moving at different velocities.
- Multilayer networks are also referred to as Heterogeneous Networks (HetNet).
- HetNet Heterogeneous Networks
- multi-layer refers to cases with a mixture of macro base stations and low power base stations (e.g. pico and micro).
- Multi-layer LTE network is used as an example for describing the method, although the idea could be applied to other cellular standards as well.
- Macro-layer and pico/micro layer may even be implemented in different RAT (for example HSPA macro layer and LTE micro layer).
- Measurement configuration defines how UE will experience its environment.
- a measurement report event defines the criteria to trigger a measurement report from user equipment towards the serving base station.
- Measurement report acts as an input to network mobility management in connected mode, while idle mode mobility is done autonomously by UE.
- 3GPP TDoc R2-115420 ["Mobility robustness for fast moving UEs in HetNet", Nokia Siemens Networks, Nokia Corporation] shows an evaluated co-channel scenario where mobility problems of non-stationary users are associated with out-bound handovers from a low power cell, e.g. handout from pico cell to another pico or macro layer.
- the measurement configurations are such that in heterogeneous networks there might be some situations in which the measurements cannot be carried out in a suitable manner.
- Embodiments of the present invention address this situation and aim to provide a measurement configuration taking into account situations such as in a heterogenous network.
- an apparatus which comprises
- an interface unit configured to provide connection to a network
- the interface unit to carry out measurements and to send measurement reports on fulfillment of measurement trigger conditions related to measurement trigger parameters via the interface unit, the measurements and corresponding measurement reports being defined according to predefined measurement events,
- At least one measurement trigger parameter is independently configured from other measurement trigger parameters for other measurement events.
- an apparatus which comprises
- an interface unit configured to provide connection to a network
- a method which comprises
- At least one measurement trigger parameter is independently configured from other measurement trigger parameters for other measurement events.
- a method which comprises
- a user equipment configuring a user equipment to carry out measurements and to send measu rement reports on fu lfil l ment of measu rement trig ger conditions related to measurement trigger parameters, the measurements and corresponding measurement reports being defined according to predefined measurement events,
- At least one measurement trigger parameter is independently configured from other measurement trigger parameters for other measurement events.
- a computer program product which comprises code means for performing a method according to any one of the above third and fourth aspects and their modifications when run on a processing means or module.
- a measurement trigger condition such as a timeToTrigger (TTT) parameter can be individually configured for each measurement event.
- TTT timeToTrigger
- Fig . 1 shows a basic structure of a UE according to an embodiment of the present invention
- Fig . 2 shows a basic operation of an eNB according to an embodiment of the present invention.
- the time is considered how long a trigger event entering condition must be valid, wherein according to the current definitions, the timer of event trigger, timeToTrigger (TTT), is not configurable per trigger event.
- TTT timeToTrigger
- 3GPP Rel-10 TS36.331 the time on how long the condition must be valid cannot be configured per event. This poses a problem where implicit combination of A3 and A5 cannot be operated nor configured in an optimum way due to a single possible TIT value.
- A3 trigger event with an average TIT to achieve a balance between radio link failures and ping-pong handovers, and at the same time configuring A5 with a very short TTT to trigger "an escape" handover (i.e., a quick handover) immediately after a particular UE is in problematic radio conditions.
- MSE Mobility State Estimation
- TTT timeToTrigger
- the measurement configuration has some flexibility for fast moving UEs, but when MSE scales down the TTT parameter, it is done for all configured events based on SpeedStateScaleFactors. It should be also noted when leaving a small cell, the system (configured with typical pedestrian user parameters) cannot react quickly enough to handout a fast moving user successfully (as described in R2-115420 mentioned above). Therefore it would be useful to configure some events with short fixed TTT, e.g . without MSE based TTT scaling . Shortening TTT too much results excessive ping-pong handovers. However, according to Rel-10 specifications it is not possible and if MSE is configured, then it shall be used for all the events.
- the UE variable VarMeasConfig [defined in 3GPP TS 36.331, section 7.1., see also section 5.5.6.2] includes the accumulated configuration of the measurements to be performed by the UE, covering intra-frequency, inter-frequency and inter-RAT mobility related measurements.
- VarMeasConfig : : SEQUENCE ⁇
- timeToTrigger- SF/SpeedStateScaleFactors are defined globally.
- ReportConfigEUTRA specifies criteria for triggering of an E- UTRAN measurement reporting event.
- ReportConfigEUTRA information element [TS 36.331]
- eventA2 SEQUENCE ⁇ a2-Threshold ThresholdEUTRA
- eventA3 SEQUENCE ⁇ a3-Offset INTEGER (-30. 30), reportOnLeave BOOLEAN
- eventA4 SEQUENCE ⁇ a4-Threshold ThresholdEUTRA
- eventA5 SEQUENCE ⁇ a5-Threshold l ThresholdEUTRA, a5-Threshold2 ThresholdEUTRA
- eventA6 SEQUENCE ⁇ a6-Offset INTEGER (-30. 30), a6- ReportOnLeave BOOLEAN
- E-UTRAN provides the measurement configuration applicable for a UE in RRC_CONNECTED by means of dedicated signalling, i.e. using the
- UEs connected to small cells at high velocity are opposite to what is considered beneficial in order to improve mobility robustness, namely by keeping fast moving UEs out of small cells.
- HetNet This sets a big limitation in HetNet, where it would be useful to configure different events with different time periods on how long the entering condition must be valid before a measurement report can be triggered to indicate a need for handover, or UE to perform cell reselection in idle mode.
- Mobility State Estimation will scale down the TIT value of each trigger event in RRC connected mode by factors [0.25, 0.50, 0.75, 1.00] . It is not possible to disable, change neither optimize the scaling factors per event. This can make the fast moving UEs to enter low power cells even faster when the trigger event contains value that is optimised for average user mobility profile.
- Non-stationary, irregular and/or unpredictable trajectory of users can increase the need for diverse measurement configurations.
- SON Self-Organizing Networks
- CEM Customer Experience Management
- Fig . 1 shows a U E 1 as a n exam ple for a correspond ing a ppa ratus according to a more general embodiment of the present invention.
- the apparatus may be a UE or may be only a part thereof, for example.
- the UE 1 comprises a processor 11 and an interface unit 12.
- the interface unit 12 is configured to provide connection to a network
- the processor 11 is configured to carry out measu rements a nd to send measurement reports on fulfillment of measurement trigger conditions related to measurement trigger parameters via the interface unit, the measurements and corresponding measurement reports being defined according to predefined measurement events, wherein for each measurement event a measurement trigger parameter is independently configured from other measurement trigger parameters for other measurement events.
- Fig . 2 shows a eNB 2 as an example for a corresponding apparatus according to a more general embodiment of the present invention. This apparatus may be a eNB, a base station or another suitable network control element, or may be only a part thereof, for example.
- the UE 2 comprises a processor 21 and an interface unit 22.
- the interface unit 22 is configured to provide connection to a network
- the processor 21 is configured to configure a user equipment to carry out measurements and to send measurement reports on fulfillment of measurement trigger conditions related to measurement trigger parameters via the interface unit, the measurements and corresponding measurement reports being defined according to predefined measurement events, wherein for each measurement event a measurement trigger parameter is independently configured from other measurement trigger parameters for other measurement events.
- the UE 1 and the eNB 2 each may also comprise a memory 13 or 23 for storing data and programs, by means of which the processor 11 or 21 may carry out its corresponding functions.
- UE measurements can be optimized with independent trigger timers, optionally using also the available user mobility information (MSE, X2 based UE History Information, ...) and cell specific size/type information in measurement trigger event configuration and optimization.
- embodiments of the present invention can provide flexibility to the configuration of measurement trigger events for advanced mobility scenarios especially in areas where heterogeneous networks are deployed, and users are moving with different velocities.
- embodiments of the present invention provide an enhanced measurement configuration with the following elements:
- the enhanced measurement configuration allows definition of independent measurement trigger event values (e.g . TimeToTrigger) for different trigger events.
- the enhanced measurement configuration can include dedicated speed dependent scaling factors (e.g . SpeedStateScaleFactors) for one or more trigger events.
- Speed dependent scaling factors can be also used to indicate which trigger events are not evaluated using parameters that are scaled based on the mobility information or mobility state estimation related scaling .
- the enhanced measurement configuration allows each trigger event to be configured to trigger only for a certain cell type, e.g . trigger for small cells based on the physical cell ID, for example.
- timeToTrigger is added to each event, or it could be a list of TimeToTrigger values signalled to UE.
- Sca le factors can a lso have al l values set to "1.0" meaning that scaling is not effective, e.g . MSE can be disabled for a certain event. Alternatively it could be indicated for which events the UE shall not apply MSE scaled parameters when doing event evaluation.
- an example for a modified definition of the ReportConfigEUTRA information element is given.
- eventAl SEQUENCE ⁇ al-Threshold ThresholdEUTRA al-timeToTrigge TimeToTrigger al-timeToTrigge SpeedStateScaleFactors
- an event specific TTT (in this example for event Al) is provided, and with al-timeToTrigger-SF, event specific MSE scaling is provided . Furthermore, it is also indicated where a list of event specific TTTs could be provided within the definition.
- Enhanced measurement configuration can be used in connected and idle mode and therefore the independent trigger event parameters can comprise of, but are not limited to : o timeToTrigger (connected mode)
- SIBs System Information Blocks
- the network can configure the users with different TTT values per measurement report trigger event and therefore provide flexible mobility robustness solutions. That is, keep the fast moving UEs out of small cells, for example, or in general, provide optimized configuration for users who are not falling into the average user profile.
- Embodiments of the present invention can be also used to provide an escape mechanism for users, where UEs are generally having an overall long TTT.
- UE can have a fast trigger representing a minimum quality before RLF is indicating that a fast handover must be performed . This trigger with short TTT activates just before RLF, e.g . when other triggers events with generally long TTT are normally used to avoid excessive number of ping-pong handovers.
- MSE SpeedStateScalingFactors impacting the TTT parameter. Therefore enhanced measurements can use optimization of the MSE scaling factors per event. MSE can be also disabled for a certain event e.g . by setting all the scaling factors to "1.0" or e.g . by specific indication that MSE scaled parameters shall not be used or alternatively shall be used in the event evaluation.
- Enhanced measurement trigger events can be used to support event optimization using both Mobility State Estimation and different source/target cell type characteristics.
- the enhanced measurement parameters will solve the problem related to diverse user mobility profiles and that parameters don't need to be a compromise between sl owly movi ng an d fast movi ng user profi le .
- Th is ca n be achieved by configuring combined trigger events.
- SON Self-Organizing Networks
- CEM customer Experience Management
- SON algorithms are typically having a problem where the generic pedestrian parameters are not optimum neither for stationary nor fast moving users. It is noted that the embodiments and the present invention in general is not limited to the specific examples given above. In particular, it is noted that different measurement trigger parameters can be defined for one measurement event. For example, timeToTrigger and also cell type and the like can be considered at the same time.
- embodiments of the present invention were described as in particular advantageous for heterogeneous networks. However, the embodiments are also applicable and advantageous for homogeneous networks. For example, individual measurement trigger parameters may be applied in order to achieve individual measurements from different UEs depending on the current network situation or the like.
- embodiments of the present invention provide an apparatus and a method by which measurements are carried out and measurement reports are sent on fulfillment of measurement trigger co n d it i o n s re l a te d to m e a s u re m e n t t ri g g e r p a ra m ete rs , t h e measurements and corresponding measurement reports being defined according to predefined measurement events, wherein for at least one measurement event at least one measurement trigger parameter is independently configured from other measurement trigger parameters for other measurement events.
- an apparatus and a method are provided by which a user equipment is configured to carry out the above functions.
- an apparatus which comprises
- an apparatus which comprises
- At least one measurement trigger parameter is independently configured from other measurement trigger parameters for other measurement events.
- an access technology via which signaling is transferred to and from a network element may be any technology by means of which a network element or sensor node can access another network element or node (e.g . via a base station or generally an access node).
- Any present or future technology such as WLAN (Wireless Local Access Network), WiMAX (Worldwide Interoperability for Microwave Access), LTE, LTE-A, Bluetooth, Infrared, and the like may be used; although the above technologies are mostly wireless access technologies, e.g . in different radio spectra, access technology in the sense of the present invention implies also wired technologies, e.g . IP based access technologies like cable networks or fixed lines but also circuit switched access technologies; access technologies may be distinguishable in at least two categories or access domains such as packet switched and circuit switched, but the existence of more than two access domains does not impede the invention being applied thereto,
- stations and transmission nodes may be or comprise any device, apparatus, unit or means by which a station, entity or other user equipment may connect to and/or utilize services offered by the access network; such services include, among others, data and/or (audio-) visual communication, data download etc. ;
- a user equipment or communication network element may be any device, apparatus, unit or means by which a system user or subscriber may experience services from an access network, such as a mobile phone or smart phone, a personal digital assistant PDA, or computer, or a device having a corresponding functionality, such as a modem chipset, a chip, a module etc., which can also be part of a UE or attached as a separate element to a UE, or the like;
- any method step is suitable to be implemented as software or by hardware without changing the idea of the invention in terms of the functionality implemented;
- MOS Metal Oxide Semiconductor
- CMOS Complementary MOS
- BiMOS Bipolar MOS
- BiCMOS Bipolar CMOS
- ECL emitter Coupled Logic
- TTL Transistor-Transistor Logic
- ASIC Application Specific IC
- FPGA Field-programmable Gate Arrays
- CPLD Complex Programmable Logic Device
- DSP Digital Signal Processor
- - devices, units or means 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 implemented as software in 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.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
L'invention concerne un appareil et un procédé par lesquels des mesures sont effectuées et des rapports de mesure sont envoyés lors de la réalisation des conditions de déclenchement de mesures liées à des paramètres de déclenchement de mesures, les mesures et les rapports de mesure correspondants étant définis selon des événements de mesure prédéfinis, pour chaque événement de mesure un paramètre de déclenchement de mesure étant configuré indépendamment des autres paramètres de déclenchement de mesures pour d'autres événements de mesure. L'invention concerne également un appareil et un procédé par lesquels un équipement d'utilisateur est configuré pour effectuer les fonctions ci-dessus.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2012/065763 WO2014023362A1 (fr) | 2012-08-10 | 2012-08-10 | Événements de déclenchement de rapports de mesure améliorés utilisant les informations de mobilité pour des réseaux hétérogènes |
Publications (1)
Publication Number | Publication Date |
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EP2883379A1 true EP2883379A1 (fr) | 2015-06-17 |
Family
ID=46750308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP12751039.4A Withdrawn EP2883379A1 (fr) | 2012-08-10 | 2012-08-10 | Événements de déclenchement de rapports de mesure améliorés utilisant les informations de mobilité pour des réseaux hétérogènes |
Country Status (2)
Country | Link |
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EP (1) | EP2883379A1 (fr) |
WO (1) | WO2014023362A1 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103155613B (zh) | 2010-10-21 | 2016-09-07 | 诺基亚技术有限公司 | 用于提供访问证书的方法和装置 |
US9560560B2 (en) * | 2014-04-28 | 2017-01-31 | Intel IP Corporation | User equipment and methods for handover using measurement reporting based on multiple events |
US9462553B2 (en) | 2014-10-27 | 2016-10-04 | Qualcomm Incorporated | Mobility based power conservation |
CN104581781B (zh) * | 2014-12-25 | 2020-12-15 | 珠海世纪鼎利科技股份有限公司 | 实现lte空口数据分析的云计算系统 |
CN104602292B (zh) * | 2014-12-26 | 2021-03-19 | 珠海世纪鼎利科技股份有限公司 | 实现4g lte小区间切换测量的系统及装置 |
CN104618929B (zh) * | 2014-12-29 | 2020-12-15 | 珠海世纪鼎利科技股份有限公司 | 实现4g lte空口监测的系统及装置 |
WO2021190725A1 (fr) * | 2020-03-23 | 2021-09-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Configuration de différentes conditions de déclenchement de rapports de mobilité pour une connectivité de réseau fiable |
Family Cites Families (5)
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KR20100126776A (ko) * | 2008-03-25 | 2010-12-02 | 가부시키가이샤 엔티티 도코모 | 이동국 및 무선기지국 |
WO2010150998A2 (fr) * | 2009-06-22 | 2010-12-29 | 엘지전자 주식회사 | Procédé et appareil de gestion dinformations système dans un système de communication sans fil prenant en charge des multiporteuses |
WO2011041753A2 (fr) * | 2009-10-02 | 2011-04-07 | Research In Motion Limited | Système et procédé permettant de rapporter des mesures |
EP2355579B1 (fr) * | 2010-02-09 | 2012-08-22 | Telefonaktiebolaget LM Ericsson (publ) | Configuration de transfert optimisé |
US20140024357A1 (en) * | 2011-04-11 | 2014-01-23 | Nokia Corporation | Method and apparatus for cell type specific measurement configuration |
-
2012
- 2012-08-10 EP EP12751039.4A patent/EP2883379A1/fr not_active Withdrawn
- 2012-08-10 WO PCT/EP2012/065763 patent/WO2014023362A1/fr active Application Filing
Non-Patent Citations (2)
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Also Published As
Publication number | Publication date |
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WO2014023362A1 (fr) | 2014-02-13 |
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