a2) United States Patent
`US 8,798,658 B2
`(0) Patent No.:
`Aug. 5, 2014
`(45) Date of Patent:
`Persson etal.
`
`US008798658B2
`
`(54) MINIMIZING DRIVE TEST LOGGED DATA
`REPORTING
`
`(75)
`
`Inventors: Hakan Persson, Solna (SE); Henrik
`Enbuske, Stockholm (SE); Hakan
`Palm, Vaxjo (SE)
`
`(73)
`
`Assignee: Telefonaktiebolaget L M Ericsson
`(publ), Stockholm (SE)
`
`(*)
`
`Notice:
`
`Subject to any disclaimer, the term ofthis
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 0 days.
`
`(21)
`
`Appl. No.:
`
`13/001,687
`
`(22)
`
`PCTFiled:
`
`Dec. 9, 2010
`
`PCT No.:
`
`PCT/SE2010/051355
`
`§ 37] (c)(1),
`(2), (4) Date:
`
`Oct. 14, 2011
`
`PCT Pub. No.: WO2012/047141
`
`PCT Pub. Date: Apr. 12, 2012
`
`(58) Field of Classification Search
`CPC wee.
`secevsenesenscesscnseeeecnensnenecaaes HO04W 24/10
`USPC wc.
`seve 455/517, 500, 507, 514, 423-425,
`455/67.11, 445, 412.1, 412.2, 422.1, 403,
`455/522, 68, 69, 426.1, 426.2, 458, 453;
`370/241, 252, 310, 328, 329, 338, 343;
`714/45, 25, 1
`See application file for complete search history.
`References Cited
`
`(56)
`
`U.S. PATENT DOCUMENTS
`
`2011/0276838 Al* 11/2011 Zhouetal. we 714/45
`OTHER PUBLICATIONS
`
`3GPP TS 37.320, 3rd Generation Partnership Project; Technical
`Specification Group Radio Access Network; Universal Terrestrial
`Radio Access (UTRA) and Evolved Universal Terrestrial Radio
`Access (E-UTRA); Radio MeasurementCollection for Minimization
`of Drive Tests (MDT); Overall Description; Stage 2 (Release 10),
`V10.0.0, Dec. 2010.
`3GPP TR 36.805, 3rd. Generation Partnership Project; Technical
`Specification Group Radio Access Network; Study on Minimization
`of Drive-Tests in Next Generation Networks (Release 9), V9.0.0,
`Dec. 2009.
`
`Prior Publication Data
`
`* cited by examiner
`
`(86)
`
`(87)
`
`(65)
`
`(60)
`
`(51)
`
`(52)
`
`US 2013/0190031 Al
`
`Jul. 25, 2013
`
`Related U.S. Application Data
`
`Provisional application No. 61/389,581, filed on Oct.
`4, 2010.
`
`Int. Cl.
`
`HO4B 7/00
`HO4W 24/10
`GO6F 11/34
`U.S. Cl.
`
`(2006.01)
`(2009.01)
`(2006.01)
`
`Primary Examiner — Keith Ferguson
`(74) Attorney, Agent, or Firm — Baker Botts L.L.P.
`
`ABSTRACT
`(57)
`This disclosure pertains to a method in a network node, a
`method in user equipment, a network node and user equip-
`ment in a wireless communications network. More particu-
`larly, there is provided methods and platforms for network
`based control of report messages comprising logged mea-
`surements in a wireless communications network. In accor-
`
`dance with some example embodiments, a UE (30) that has
`stored logged data i.e. logged measurements that are bigger
`than a single transmission packet, 1.e. report message, seg-
`ments the logged measurements and sends only a portion of
`the logged measurements that fits into a single report mes-
`sage. The UE (30) also indicates to a network node (28)that
`additional logged measurements exist at the UE buffer (44).
`
`CPC veececcesseeen HO04W 24/10 (2013.01); GO6F 11/34
`(2013.01); HO4B 7/00 (2013.01)
`USPC oo... 455/517; 455/500; 455/423; 455/67.11;
`455/425; 455/426.1; 370/241; 370/252; 370/310;
`370/328; 370/343; 714/45; 714/25; 714/1
`30 Claims, 6 Drawing Sheets
`
`Send request to the UE to start transmitting logged
`measurements in a report message
`
`$62
`
`
`
`
`transmitted? YES
`
`S64
`
`Receive the report message cornprising the logged.
`measurements
`
`366
`Does received report
`
`message comprises an
`indicator of additional
`logged measurementsnot yet
`
`S68
`
`
`
`Decide ifthe additional logged measurements need
`to be requested
`
`
`
`IPR2022-00459
`Apple EX1001 Page1
`
`IPR2022-00459
`Apple EX1001 Page 1
`
`

`

`U.S. Patent
`
`Aug. 5, 2014
`
`Sheet 1 of 6
`
`US 8,798,658 B2
`
`
`
`
`
`1. Indicate available logged measurements
`
`
`
`28 Network node
`(eNB/RNC)
`
`2. Determine if the NW should
`request logged measurements
`
`3. Request logged measurements
`
`4. Deliver available logged measurements
`
`
`
`Fig. 1 (Prior art)
`
`IPR2022-00459
`Apple EX1001 Page 2
`
`IPR2022-00459
`Apple EX1001 Page 2
`
`

`

`U.S. Patent
`
`Aug. 5, 2014
`
`Sheet 2 of 6
`
`US 8,798,658 B2
`
`Network node
`
`Network node Processorcircuit
`
`Network node Communications Interface
`
`Wireless Terminal (UE)
`
`42
`
`UEcommunicationsInterface
`
`UEprocessorcircuit
`
`Fig. 2
`
`IPR2022-00459
`Apple EX1001 Page 3
`
`IPR2022-00459
`Apple EX1001 Page 3
`
`

`

`U.S. Patent
`
`Aug. 5, 2014
`
`Sheet 3 of 6
`
`US 8,798,658 B2
`
`Send request to the UEto start transmitting logged
`
`measurements in a report message
`
`Receive the report message comprising the logged
`measurements
`
`to be requested
`
`Doesreceived report
`message comprises an
`indicator of additional
`logged measurements not yet
`transmitted?
`
`Decide if the additional logged measurements need
`
`Fig. 3
`
`IPR2022-00459
`Apple EX1001 Page 4
`
`IPR2022-00459
`Apple EX1001 Page 4
`
`

`

`U.S. Patent
`
`Aug. 5, 2014
`
`Sheet 4 of 6
`
`US 8,798,658 B2
`
`Receive indication of existents of logged
`measurements that are available
`
`Send request to the UEto start transmitting logged
`
`measurements in a report message
`
`Receive the report message comprising the logged
`measurements
`
`indicator?
`
`Wait for
`
`indication S71
`
` NO
`
`Decide if the additional logged measurements need
`to be requested
`
`S79
`
`Requestall logged measurements
`
`IPR2022-00459
`Apple EX1001 Page 5
`
`I I I I
`
`I I I
`
`IPR2022-00459
`Apple EX1001 Page 5
`
`

`

`U.S. Patent
`
`Aug. 5, 2014
`
`Sheet 5 of 6
`
`US 8,798,658 B2
`
`Receive request from the network nodeto start
`transmitting logged measurementsin a report
`message
`
`Do the logged measurements
`fit in the report message?
`
`to the network node as a response to the request
`
`Include in the report message an indicator of
`additional logged measurements not yet transmitted
`
`Transmit the report message, comprising the indicator,
`
`Fig. 5
`
`IPR2022-00459
`Apple EX1001 Page 6
`
`IPR2022-00459
`Apple EX1001 Page 6
`
`

`

`U.S. Patent
`
`Aug. 5, 2014
`
`Sheet 6 of 6
`
`US 8,798,658 B2
`
`S90
`
`_.
`.
`__.
`Periodically perform radio condition measurements
`and store as logged measurements
`
`S91
`
`S92
`
`measurements in a report message
`
`Receive requestto start transmitting logged
`
`S94
`
`S96
`
`S98
`
`
`
`
`
`Do the logged measurements
`fit in the report message?
`
`Include in the report message an indicator of
`additional logged measurements not yet transmitted,
`and a reporting time stamp
`
`
`
`Transmit the report message, including oldest logged
`measurements, to the network nodeas a response to the
`request
`
`S99
`
`Delete oldest logged measurements that are
`
`transmitted from UEbuffer
`
`Fig. 6
`
`IPR2022-00459
`Apple EX1001 Page 7
`
`IPR2022-00459
`Apple EX1001 Page 7
`
`

`

`US 8,798,658 B2
`
`1
`MINIMIZING DRIVE TEST LOGGED DATA
`REPORTING
`
`This application is the U.S. national phaseof International
`Application No. PCT/SE2010/051355, filed 9 Dec. 2010,
`which designated the U.S. and claims the benefit to U.S
`Provisional No. 61/389,581, filed 4 Oct. 2010, the entire
`contents of each of which are hereby incorporated byrefer-
`ence.
`
`TECHNICAL FIELD
`
`This disclosure pertains to a method in a network node, a
`method in user equipment, a network node and user equip-
`ment in a wireless communications network. More particu-
`larly, there is provided mechanismsfor network based control
`of report messages comprising logged measurements in a
`wireless communications network.
`
`BACKGROUND
`
`In a typical cellular radio system, wireless terminals, also
`known as mobile stations and/or User Equipments units
`(UEs), communicate via a Radio Access Network (RAN)to
`one or more core networks. The wireless terminals, hereinaf-
`ter called UEs whichis the same as User Equipments, can also
`be mobile telephones, i.e. “cellular” telephones, and laptops
`with wireless capability e.g., mobile termination, and thus
`are, for example, portable, pocket, hand-held, computer-in-
`cluded, or car-mounted mobile devices which communicate
`voice and/or data via the RAN.
`
`The RAN normally covers a geographical area which is
`dividedinto cell areas, also denoted cells, with each cell area
`being served by a base station e.g., a Radio Base Station
`(RBS), which in some networksis also called “NodeB”or “B
`node”. A cell is a geographical area where radio coverageis
`provided by base station equipmentata base station site. Each
`cell is identified by an identity within the local radio area,
`whichis broadcastin the cell. The base station communicates
`
`overthe air interface operating on radio frequencies with the
`UEswithin rangeofthe basestations.
`In someversions, particularly earlier versions of the RAN,
`several base stations are typically connected, e.g., by land-
`lines or microwave, to a Radio Network Controller (RNC).
`The RNC, also sometimes termed a Base Station Controller
`(BSC), supervises and coordinates various activities of the
`plural base stations connected thereto. The radio network
`controllers are typically connected to one or more core net-
`works.
`The Universal Mobile Telecommunications System
`(UMTS)is a third generation mobile communication system,
`which evolved from the Global System for Mobile Commu-
`nications (GSM), andis intendedto provide improved mobile
`communication services based on Wideband Code Division
`
`Multiple Access (WCDMA)access technology. UTRANis
`essentially a radio access network using wideband codedivi-
`sion multiple access for user equipment units (UEs). The
`Third Generation Partnership Project (GPP) has undertaken
`to evolve further the UTRAN and GSM based radio access
`
`network technologies.
`Long Term Evolution (LTE)is a variant of a 3GPP radio
`access technology wherein the radio base station nodes are
`connected directly to a core network rather than to RNCs. In
`general, in LTE the functions of the RNC nodeare performed
`by the RBSs. As such, the RAN of an LTE system has an
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`2
`essentially “flat” architecture comprising RBSs without
`reporting to RNCs. In LTE networksthe basestation(s) is/are
`called eNodeB(s) or eNB(s).
`3GPPis in the processof defining solutions for Minimizing
`Drive Tests (MDT). The intention of the Minimizing Drive
`Tests (MDT) work is documented in 3GPP TR 36.805 V9.0.0
`(2009-12), 3rd Generation Partnership Project; Technical
`Specification Group Radio Access Network; Study on Mini-
`mization of drive-tests in Next Generation Networks (Release
`9).
`
`Stage 2 of Minimizing Drive Tests (MDT) is currently
`being developed in TS 37.320,i.e., 3GPP TS 37.320, “Radio
`measurement collection for Minimization of Drive Tests
`(MDT); Overall description; Stage 2”. MDT Stage 2 includes
`a VE measurementlogging function and immediate reporting
`function. The 3GPP TS 37.320 documentessentially focuses
`on the UE measurement logging function.
`An important use case for MDTis coverage optimization.
`For this purpose following UE measurements, or similar
`functionalities, are considered for UE-internal logging: Peri-
`odic, e.g. one every 5 s, downlink pilot signal strength mea-
`surements; a serving cell becomes worse than threshold;
`transmit power headroom becomesless than threshold; Pag-
`ing Channel Failure i.e. Paging Control CHannel (PCCH)
`decode error; and Broadcast Channel failure.
`The network can request the UE to perform logging of
`measurements. The UE executes measurements and logs
`these measurements internally in a sequential manner, con-
`taining, e.g., some hour of logged measurementinformation.
`As described in FIG.1, the UE indicates to the network if
`it has available log i.e. available logged measurements. The
`network node i.e. eNB/RNC determines if it should request
`the logged measurements or not.If it decides to do so then a
`request is sent to the UEto deliver the log in a report message.
`From the eNB/RNC,the reported logged measurements may
`further be sent to an OAMserveror similar.
`
`The current 3GPP assumptions on this log (i.e. logged
`measurements)feature are, e.g., as follows: the UEis required
`to maintain only one log at a time; one log only contains
`measurement information collected in one Radio Access
`
`Technology (RAT); a log can only be reported and indicated
`when the UEis in connected state; If UE is requested to start
`logging, e.g., by configuration, a possibly old log and con-
`figuration stored in UEis erased.
`What the logged measurement report message in signal
`number4 in FIG. 1 should look like has not yet been decided,
`as ofthe filing of this application. Some proposals for man-
`agement of measurementreport have been proffered.
`As one example proposal for management ofmeasurement
`reports, it has been suggestedthat a log i.e. logged measure-
`ments,are to be sent in a single packet, and keepingthat single
`packet within the size limits of a Packet Data Convergence
`Protocol (PDCP) Protocol Data Unit (PDU). Keeping the
`single packet within the size limits of a PDCP PDU makesit
`possible to use a Radio Resource Control RRC message for
`reporting without being segmentedinto several smaller pack-
`ets before being sent to the receiving node 1.e., the eNB or
`NB/RNC in LTE or UMTS, respectively. One option ofthis
`proposal wouldbe limiting the maximum size of a log ina UE
`to one RRC messagethatfits into one PDCP payload packet.
`Asanother example proposal for management ofmeasure-
`mentreports, it has been suggested to send a log i.e. a logged
`measurementthat is larger than a RRC message with several
`RRC messages.
`However, there are disadvantages to both example propos-
`als mentioned above. For example, limiting the log size could
`prevent logging to complete for the whole configured run
`
`IPR2022-00459
`Apple EX1001 Page 8
`
`IPR2022-00459
`Apple EX1001 Page 8
`
`

`

`US 8,798,658 B2
`
`3
`time i.e. logging duration, which can be several hours. The log
`couldfill the limited log buffer in the UE before any measure-
`ment report has been possible to send to the network node.
`Before the configured logging duration time has ended, the
`UE would stop the loggingso that to only allow the log size to
`be a single packet e.g. single RRC packet, and relevant mea-
`surements reports may not thereafter be logged. Also in the
`current MDTconfigurationa start time for the logging is not
`configurable. This means that for a prolonged logging cam-
`paigna long period between logging instances may be needed
`in the MDTconfiguration, alternatively new MDT configu-
`ration needs to be provided from the OAM periodically to be
`conveyed to MDT capable UEs.
`For the other proposal, sending too many RRC packets in a
`row could, in poor radio environments or when handover
`would occur, create problems with the radio connections and
`could also create unnecessary radio link failures that will
`make the users suffer and logged data be lost.
`
`SUMMARY
`
`The technology disclosed herein concerns network based
`control of report messages comprising logged measurements
`in a wireless communications network, which overcomesat
`least some of the above mentioned disadvantages and which
`allows multiple partial report messagesto be sent.
`Tn accordance with some example embodiments, a UE that
`has stored logged data i.e. logged measurements that are
`bigger than a single transmission packet, i.e. report message,
`segments the data and sendsonly a portion ofthe data thatfits
`into a single report message, and also indicates that more
`logged measurements exists at the UE.
`In a first example of embodiment, there is disclosed a
`methodin a network nodefor network based control ofreport
`messages in a wireless communications network. The net-
`work node being configured to serve a user equipment, UE,
`and to receive report messages from the user equipment. The
`method comprises sending a request to the UEtostart trans-
`mitting logged measurements in a report message. The net-
`work node then receives the report message comprising the
`logged measurements from the UE, and determines if the
`received report message comprises an indicator of additional
`logged measurementsnotyet transmitted, and if so, decides if
`the additional logged measurements need to be requested.
`In a second example of an embodimentthereis disclosed a
`network nodefor network based control ofreport messages in
`a wireless communications network. The network node being
`configured to serve a user equipment, UE, and to receive
`report messages from the user equipment. The network node
`comprises a network node communications interface and a
`network node processor circuit. The network node commu-
`nications interface being configured to send a request to the
`UEto start transmitting logged measurements in a report
`message, and to receive the report message comprising the
`logged measurements. The network node processor circuit
`being configured to determineif the received report message
`comprises an indicator of additional logged measurements
`not yet transmitted; and if so, to decide if the additional
`logged measurements needto be requested.
`In a third example of an embodiment, there is disclosed a
`method in a User Equipment, UE,for assisting in network
`based control of report messages in a wireless communica-
`tions network. The UE is being in connection with a serving
`network node and configured to transmit report messages to
`the network node upon request. The UE isfurther configured
`to periodically perform radio condition measurements and
`store the periodically performed measurements in a UE buffer
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`4
`as logged measurements. The method comprising: receiving
`a request, in the UE, from the network nodeto start transmit-
`ting logged measurements ina report message; determining if
`the logged measurementsfit in the report message; and ifnot,
`including in the report message an indicator of additional
`logged measurements not yet transmitted; and, transmitting
`the report message, comprising the indicator, to the network
`nodeas a responseto the request.
`In a fourth example of an embodiment,there is disclosed a
`User Equipment, UE,for assisting in a network based control
`of report messages in a wireless communications network.
`The UEis being in connection with a serving network node
`and is configured to transmit report messagesto the network
`node. The UEis further configured to periodically perform
`radio condition measurements andstore the periodically per-
`formed measurements in a buffer as logged measurements.
`The VE comprises a UE communicationsinterface and a UE
`processorcircuit. The UE communications interface is con-
`figured to receive a request from the network nodeto start
`transmitting logged measurements in a report message, and to
`transmit the report message comprising the logged measure-
`ments. The UE processorcircuit is configured to determine if
`the logged measurementsfits in the report message, and ifnot,
`indicating in the report message to be transmitted an existents
`of additional logged measurements not yet transmitted.
`An advantage achieved by some of the above mentioned
`embodimentsis that due to use of indicator in report message
`of further remaining logged measurements providingthe net-
`work,i.e. a network node, with information needed to decide
`a timing of transmission of the logged measurements and a
`timing of when more logged measurements should be
`requested.
`Another advantage achieved by at least some of the above
`mentioned embodiments is to makeit possible to have longer
`logging duration and/or conduct more frequent measure-
`ments without overflow in log memory in UE e.g. UE buffer.
`Another advantage achieved by some of the above men-
`tioned embodiments is to provide the network node with
`information about logged measurements makingit possible
`to determine the amount of logged measurements kept in a
`UE.
`
`The foregoing and other objects, features, and advantages
`will become apparent
`from following more particular
`descriptions of preferred embodiments and aspects of
`embodiments as will be illustrated by accompanying draw-
`ings in which reference characters refer to the same parts
`throughout various views.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`The drawingsare not necessarily to scale, emphasis instead
`being placed uponillustrating principles of the disclosure.
`FIG. 1 is a signaling schemeillustrating how logged mea-
`surements are reported accordingto priorart.
`FIG.2 is a schematic block diagram illustrating example
`embodiments of a network node and a user equipment.
`FIG.3 is a flowchart depicting an example embodimentof
`a method in a network node.
`FIG.4 is a flowchart depicting further example embodi-
`ments of a method in a network node.
`FIG.5 is a flowchart depicting an example embodimentof
`a method in a user equipment.
`FIG.6 is a flowchart depicting further example embodi-
`ments of a method in a network node.
`
`DETAILED DESCRIPTION
`
`FIG.2 illustrates portions of an example embodimentof a
`communications system/network, and particularly portions
`
`IPR2022-00459
`Apple EX1001 Page 9
`
`IPR2022-00459
`Apple EX1001 Page 9
`
`

`

`US 8,798,658 B2
`
`6
`5
`According to one embodiment, the network node commu-
`ofa Radio Access Network (RAN) 20 comprisingat least one
`network node 28 and a wireless terminal, hereinafter denoted
`nications interface 52 may be configured to request the report
`message(s) directly from the VE 30 or from another network
`User Equipment, (UE) 30. Depending onaparticular type of
`node, e.g. RNC, MME, RBS orother similar node.
`RANutilized and delegation of nodal responsibilities, the
`According to one embodiment, the network node commu-
`network node 28 maybea basestation node e.g., an NodeB in
`nications interface 52 may be configured to request the report
`UMTSor an eNodeB in Long Term Evolution (LTE)) or a
`message upon receiving a UE access requestinitiated by a UE
`Radio Network Controller (RNC) node in UMTS. Thus, the
`UE 30 communicates over radio interface 32 with the net-
`handover procedure from another network node to the net-
`work node. The request may for example be a RRC connec-
`tion request. The network node communications interface 52
`may also be configured to receive a network node message
`from the other network node i.e. another eNodeB, RNC or
`RBS, comprising UE specific information. The UE specific
`information may further comprise the indicator indicating
`additional logged measurementsnotyet transmitted.
`The network nodeprocessorcircuit 50, mentioned above in
`relation to FIG. 2, is configured to determine if the received
`report message(s) comprises an indicator ofadditional logged
`measurement(s) not yet transmitted; and if'so, to decide ifthe
`additional
`logged measurements need to be requested.
`According to one embodiment, the network node processor
`circuit 50 may be configured to decide ifthe additional logged
`measurements need to be requested based on one or more of
`the following: interference level experienced in a cell; radio
`condition measurements experiencedin a cell; available radio
`resource; network node capacity; UE buffer state condition
`etc.
`
`10
`
`15
`
`20
`
`25
`
`work node 28, either directly over radio interface 32 with the
`network node 28 in case of the network node 28 being a base
`station type node, or overthe radio interface 32 and through a
`base station in the case of the network node 28 being a radio
`network controller (RNC) node or an Mobility Management
`Entity (MME) whichis a control node which processessig-
`naling between the UE and the Core Network (CN) and
`provides Visitor Location Register (VLR) functionality for
`the Evolved Packet System (EPS).
`As mentioned above, the UE 30 can be a mobile station
`such as a mobile telephone (“cellular” telephone) or laptop
`with wireless capability (e.g., mobile termination), and thus
`can be, for example, a portable, pocket, hand-held, computer-
`included, or car-mounted mobile device which communi-
`cates voice and/or data via radio access network.
`
`In accordance with oneofits aspect, the technology dis-
`closed concerns generation and/or transmission and/or use of
`multiple partial report messages with logged measurements
`such as MDTlog packets, also denoted MDTlog or MDT log
`data. As such, FIG. 2 shows an example embodiment of
`network node 28 or UE 30, which comprises a UE commu-
`nication interface 42 and a VEprocessorcircuit 40. Note that
`the UE maybe seen as a serving point. The UE processor
`circuit may include a buffer 44, i.e. UE buffer, for storing
`logged measurements, not shown in figure, and in another
`embodimentthe buffer 44 is within the UE 30.
`
`FIG.2 also illustrates network node 28 as comprising a
`network nodeprocessorcircuit 50 and network node commu-
`nications interface 52 (i.e. a communicationsinterface of the
`network node). The network node processor circuit 50 may
`be, or comprise, a logged measurements requestor/processor
`(not shownin figure) to be used for requesting logged mea-
`surements, such as MDTlog, in report message(s).
`According to one example of an embodiment, the network
`node 28is used for network based control of report messages
`comprising logged measurements in a wireless communica-
`tions network, the network node 28 being configured to serve
`the UE 30, UE,andto receive report messages from the UE
`30.
`
`Continuing with the description of FIG. 2, the network
`node communications interface 52 is, or may be, configured
`to send request(s) to the UE 30 to start transmitting logged
`measurement(s) in report message(s), and to receive the
`report message(s) comprising the logged measurements. The
`logged measurements may comprise one or moreofthe fol-
`lowing: measurement time stamps for each performed mea-
`surement; UE buffer state condition; positioning information
`of UE; periodically measured downlink pilot signal strength;
`serving cell conditions; transmit power headroom conditions;
`paging channel failure(s); maximum required memory sup-
`ported by UE; and broadcast channelfailure(s).
`According to one embodiment, the network node commu-
`nications interface 52 may be configuredto receive, from the
`UE30, an indication of existents oflogged measurements that
`are available. Note, that the “additional logged measure-
`ments” indicator is conveyed in the UE information report
`message while the indication of logged measurements avail-
`able is conveyedin already existing/specified signaling.
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`According to one embodiment, the network node proces-
`sor circuit 50 may be configured to determineif the indicator
`indicates that there are logged measurements in a UE buffer
`44that do, or do not, fit in a single subsequent report message.
`According to one embodiment, the network node proces-
`sor circuit 50 may be configured to decide to requestall the
`logged measurements in the buffer 44 of the UE in one sub-
`sequent request, or repeatedly upon receiving each report
`message. The decision mayalso be based on receivedstatus
`information of the buffer 44 in the UE 30 being for example
`overloaded. Note that configured to or adaptedto in relation to
`functionality of circuits and devices mentioned above and
`throughout the whole disclosure are expressions that may be
`used having a similar or same meaning.
`It should be appreciated that the network node processor
`circuit 50 may comprise an MDT log requestor/processor 50'
`(not shownin FIG. 2) which may be implementedin platform
`fashion, e.g., implemented by a computer/processor execut-
`ing instructions of non-transient signals and/or by a circuit.
`Likewise from a UE perspective, reference made to FIG.2,
`the UE 30 maybe,oris, used for assisting in network based
`control of report messages comprising logged measurements
`in a Wireless communications network. The UE 30 is being in
`connection with the serving network node 28 andis config-
`ured to transmit report message(s) to the network node 30.
`The VE 30 mayfurther be configured to periodically perform
`radio condition measurements andstore the periodically per-
`formed measurements in the buffer 44 as logged measure-
`ments. Such logged measurements may be MDTlogreports.
`The UE communications interface 42 mentioned above in
`
`relation to FIG.2, is configured to receive a request from the
`network node 28to start transmitting logged measurements in
`report message(s), and to transmit/send the report message(s)
`comprising the logged measurements. The UE processorcir-
`cuit 40 is configured to determineifthe logged measurements
`fits in the report message(s), andifnot, indicating in the report
`message to be transmitted an existents of additional logged
`measurements not yet transmitted.
`According to one embodiment of an example implemen-
`tation ofa UE 30 in which the UE processor circuit 40 may be,
`
`IPR2022-00459
`Apple EX1001 Page 10
`
`IPR2022-00459
`Apple EX1001 Page 10
`
`

`

`US 8,798,658 B2
`
`7
`or may comprise, a multiple partial MDT log reporter 40'
`(FIG.2 dashedlines). The multiple partial MDT log reporter
`40' may comprise a log report generator and data logging unit
`(not shownin FIG. 2). The multiple partial MDT log reporter
`40' works in conjunction with a measurementunit (not shown
`in FIG.2), and stores records ofmeasurements in data logging
`unit. The log report generator may further comprise a packet
`identifier generator and “more data”i.e. additional data,flag
`generator.
`The technology disclosed above,andin relation to some of
`the earlier mentioned embodiments,
`includes support for
`logged measurements, or an MDT log size, which exceeds a
`maximumsize of the report message which may for example
`be a Packet Data Convergence Protocol (PDCP) packet. The
`technology disclosed herein also introduces and provides an
`indication from the VE 30 ofadditional logged measurements
`or MDTlog data that remains in the UE buffer 44. In accor-
`dance with some example embodiments, a UE 30 that has
`stored logged measurements, sometimes denoted logged
`data, that are bigger than a single report messagei.e. trans-
`mission packet, segments the logged measurements, and
`sends only a portion ofthe logged measurements thatfits into
`a single report message. The UE 30 also indicates that more
`logged measurementsexist at the UE 30 in the buffer 44. This
`indication of further remaining logged measurements allows
`the network node 28 to decide a timing of transmission of the
`logged measurements and a timing of when more logged
`measurements should be requested. This may for example
`depend on radio condition measurements or UE buffer status
`information.
`
`The UE 30 will take a part of the logged measurements and
`put into the payloadof the report message. The UE 30 will, if
`more logged measurementsarestill available, set a “more”or
`“additional”bit indicating to the network node 28,or by other
`means indicate to the network node 28, that there are more
`logged measurements available in the UE 30. The network
`node 28 will then, when it believes more data should be
`obtained e.g. based on: interference level experienced in a
`cell; radio condition measurements experienced in a cell;
`available radio resource; network node capacity; UE buffer
`state condition etc., request more logged measurements.
`Whena request is done then the process may be repeated. A
`new decision may be taken after a new report message is
`received, and so on. In other words, upon reception of indi-
`cation from UE,the network node 28 takes a decision (based
`on current radio conditions, node capacity) whetherthe net-
`work node 28 shall request more logged measurements
`“data” from the UE noworrequestit at a later point in time.
`This “later point in time” could be predefinede.g. 15 s later. In
`one example an internal algorithm may for instance check to
`see if no Hand Over (HO) is imminent or other morevital
`procedure is at hand. The report messages may belost if
`unsuccessfully reporting happens just before a HO. In one
`example, the network node 28 may be configured to continue
`requesting reporting of logged measurements (MDTlogs) in
`report messagesuntil there are no more logged measurements
`to report.
`An example of an embodiment of a method that may be
`implementedin the network node 28 is illustrated by FIG.3.
`The methodis used for network based control of report mes-
`sages comprising logged measurements in a wireless com-
`munications network. According to the method, the network
`node 28 which is being configured to serve a UE 30, receives
`report messages from the UE 30 as mentioned abovein rela-
`tion to FIG. 2. More particularly, the method comprises:
`sending S62 a request to the UEtostart transmitting logged
`measurements in a report message; receiving S64 the report
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`8
`message comprising the logged measurements; determining
`$66 if the received report message comprises an indicator of
`additional logged measurements notyet transmitted; and if
`so, deciding S68 if the additional logged measurements need
`to be requested.
`Yet an example of an embodiment of a method for imple-
`mentation in the network node28 is illustrated by FIG. 4. The
`general steps 1.e. S72, S74, S76 and S78 correspond to S62-
`$68 mentioned above. In this example method comprises the
`network node 28 first receiving $71, e.g. from the UE 30, an
`indication of existents of logged measurementsthatare avail-
`able i.e. the UE buffer 44 is not empty or more data exists in
`UE buffer 44. Note that this indication