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`I U.S. DEPARTMENT OF COMMERCE PATENT AND TRADEMARK OFFICE
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`CONCERNING A FILING UNDER 35 U.S.C. 371
`INTERNATIONAL APPLICATION NO.
`INTERNATIONAL FILING DATE
`I
`PCT/SE2010/051355
`9 December 2010
`
`ATTORNEY'S DOCKET NUMBER
`2380-1599
`U.S. APPLICATION NO. (If known, see 37 C.F.R. 1.5)
`
`To be assigned
`PRIORITY DATE CLAIMED
`4 October 2010
`
`TITLE OF INVENTION
`
`APPLICANT(S) FOR DO/EO/US
`
`MINIMIZING DRIVE TEST LOGGED DATA REPORTING
`
`a.
`
`sheets drawings,
`
`page
`
`PERSSON et al.
`Applicant herewith submits to the United States Designated/Elected Office (DO/EO/US) the following items and other information:
`[gl This is a FIRST submission of items concerning a submission under 35 U.S.C. 371.
`1.
`2. D This is a SECOND or SUBSEQUENT submission of items concerning a submission under 35 U.S.C. 371.
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`4. D The U.S. has been elected (Article 31 ).
`5. A copy of the International Application as filed (35 U.S.C. 371 (c)(2).
`[gl
`is attached hereto (23 pages including specification, claims (30 claims), abstract; and 5 sheets drawings).
`[gl has been communicated by the International Bureau.
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`pages specification, claims & abstract (
`claims),
`Certificate of Translation).
`b. D has been previously submitted under 35 U.S.C. 154(d)(4).
`7. D Amendments to the claims of the International Application under PCT Article 19 (35 U.S.C. 371 (c)(3)
`a. D are attached hereto (required only if not communicated by the International Bureau).
`b. D have been communicated by the International Bureau.
`c. D have not been made; however, the time limit for making such amendments has NOT expired.
`d. D have not been made and will not be made.
`8. D An English language translation of the amendments to the claims under PCT Article 19 (35 U.S.C. 371 ( c)(3).
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`A second copy of the published international application under 35 U.S.C. 154(d)(4 ).
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`A second copy of the English language translation of the international application under 35 U.S.C. 154(d)(4 ).
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`Other items or information.
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`1735448
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`PCT/SE2010/051355
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`Mail Stop PCT
`I ATTORNEY'S DOCKET NUMBER
`
`2380-1599
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`U.S. APPLICATION NO. (If known, see 37 C.F.R. 1.5) I INTERNATIONAL APPLICATION NO.
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`$
`$
`$
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`$
`$
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`330.00
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`220.00
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`430.00
`980.00
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`0.00
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`130.00
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`520.00
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`e. 181 The entire content of International Application No. PCT/SE2010/051355 and U.S. Provisional No. 61/389,581, referred to in this
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`/H. Warren Burnam, Jr./
`H. Warren Burnam, Jr.
`NAME
`December 28, 2010
`29,366
`REGISTRATION NUMBER Date
`
`- 2-
`
`1735448
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`

`

`IN THE UNITED STATES PATENT AND TRADEMARK OFFICE
`
`In re Patent Application of
`
`PERSSON et al.
`
`Atty. Ref.: 2380-1599
`
`National Phase of PCT/SE2010/051355
`International Filing Date: 9 December 2010
`
`Appl. No. To be assigned
`
`TC/A.U. To be assigned
`
`Filed: December 28, 2010
`
`Examiner: To be assigned
`
`For: MINIMIZING DRIVE TEST LOGGED DATA REPORTING
`
`*
`
`*
`
`*
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`*
`
`*
`
`*
`
`*
`
`*
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`*
`
`*
`
`*
`
`December 28, 2010
`
`Commissioner for Patents
`P.O. Box 1450
`Alexandria, VA 22313-1450
`
`Sir:
`
`PRELIMINARY AMENDMENT
`
`In order to place the above-identified application in better condition for
`
`examination, please amend the application as follows:
`
`1735433
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`Preliminary Amendment
`PERSSON et al. - National Phase of PCT/SE2010/051355
`Appl. No. To be assigned
`Atty. Ref.: 2380-1599
`December 28, 2010
`
`REMARKS
`
`The title has been amended and the specification has been amended to include
`
`a cross-reference to the parent PCT application.
`
`Claims 1-30 are the pending claims in the present application. The claims have
`
`been amended, without prejudice, to eliminate a multiple dependencies to reduce
`
`claims fees and/to conform US patent practice.
`
`Respectfully submitted,
`
`NIXON & VANDERHYE P.C.
`
`By:
`
`/H. Warren Burnam, Jr./
`H. Warren Burnam, Jr.
`Reg. No. 29,366
`
`HWB:cmg
`901 North Glebe Road, 11th Floor
`Ari ington, VA 22203-1808
`Telephone: (703) 816-4000
`Facsimile: (703) 816-4100
`
`- 12 -
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`P32817
`
`1
`
`NETWORK BASED CONTROL OF REPORT MESSAGES IN A WIRELESS
`
`COMMUNICATIONS NETWORK
`
`TECHNICAL FIELD
`
`This disclosure pertains to a method in a network node, a method in user equipment, a network
`
`5
`
`node and user equipment in a wireless communications network. More particularly, there is
`
`provided mechanisms for 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
`
`10 User Equipments units (UEs), communicate via a Radio Access Network (RAN) to one or
`
`more core networks. The wireless terminals, hereinafter called UEs which is 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(cid:173)
`
`held, computer-included, or car-mounted mobile devices which communicate voice and/or data
`
`15
`
`via the RAN.
`
`The RAN normally covers a geographical area which is divided into 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 networks is also called "NodeB" or "B node". A cell is a geographical area
`
`where radio coverage is provided by base station equipment at a base station site. Each cell is
`
`2 0
`
`identified by an identity within the local radio area, which is broadcast in the cell. The base
`
`station communicates over the air interface operating on radio frequencies with the UEs within
`
`range of the base stations.
`
`In some versions, particularly earlier versions of the RAN, several base stations are typically
`
`connected, e.g., by landlines or microwave, to a Radio Network Controller (RNC). The RNC,
`
`2 5
`
`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 networks.
`
`The Universal Mobile Telecommunications System (UMTS) is a third generation mobile
`
`communication system, which evolved from the Global System for Mobile Communications
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`P32817
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`2
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`(GSM), and is intended to provide improved mobile communication services based on
`
`Wideband Code Division Multiple Access (WCDMA) access technology. UTRAN is
`
`essentially a radio access network using wideband code division multiple access for user
`
`equipment units (UEs). The Third Generation Partnership Project (3GPP) has undertaken to
`
`5
`
`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
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`base station nodes are connected directly to a core network rather than to RNCs. In general, in
`
`LTE the functions of the RNC node are performed by the RBSs. As such, the RAN of an LTE
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`system has an essentially "flat" architecture comprising RBSs without reporting to RNCs. In
`
`10
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`LTE networks the base station(s) is/are called eNodeB(s) or eNB(s).
`
`3GPP is in the process of 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 Minimization of drive-tests in Next Generation Networks (Release 9).
`
`15
`
`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);
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`Overall description; Stage 2". MDT Stage 2 includes a UE measurement logging function and
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`immediate reporting function. The 3GPP TS 37.320 document essentially focuses on the UE
`
`measurement logging function.
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`2 0 An important use case for MDT is coverage optimization. For this purpose following UE
`
`measurements, or similar functionalities, are considered for DE-internal logging: Periodic, e.g.
`
`one every 5s, downlink pilot signal strength measurements; a serving cell becomes worse than
`
`threshold; transmit power headroom becomes less than threshold; Paging Channel Failure i.e.
`
`Paging Control CHannel (PCCH) decode error; and Broadcast Channel failure.
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`2 5
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`The network can request the UE to perform logging of measurements. The UE executes
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`measurements and logs these measurements internally in a sequential manner, containing, e.g.,
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`some hour of logged measurement information.
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`As described in Fig. 1, the UE indicates to the network if it has available log i.e. available
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`logged measurements. The network node i.e. eNB/RNC determines if it should request the
`
`3 0
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`logged measurements or not. If it decides to do so then a request is sent to the UE to deliver the
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`P32817
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`3
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`log in a report message. From the eNB/RNC, the reported logged measurements may further be
`
`sent to an OAM server or similar.
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`The current 3GPP assumptions on this log (i.e. logged measurements) feature are, e.g., as
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`follows: the UE is required to maintain only one log at a time; one log only contains
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`5 measurement information collected in one Radio Access Technology (RAT); a log can only be
`
`reported and indicated when the UE is in connected state; If UE is requested to start logging,
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`e.g., by configuration, a possibly old log and configuration stored in UE is erased.
`
`What the logged measurement report message in signal number 4 in Fig. 1 should look like has
`
`not yet been decided, as of the filing of this application. Some proposals for management of
`
`10 measurement report have been proffered.
`
`As one example proposal for management of measurement reports, it has been suggested that a
`
`log i.e. logged measurements, are to be sent in a single packet, and keeping that 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 makes it possible to
`
`15
`
`use a Radio Resource Control RRC message for reporting without being segmented into
`
`several smaller packets before being sent to the receiving node i.e., the eNB or NB/RNC in
`
`LTE or UMTS, respectively. One option of this proposal would be limiting the maximum size
`
`of a log in a UE to one RRC message that fits into one PDCP payload packet.
`
`As another example proposal for management of measurement reports, it has been suggested to
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`2 0
`
`send a log i.e. a logged measurement that is larger than a RRC message with several RRC
`
`messages.
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`However, there are disadvantages to both example proposals mentioned above. For example,
`
`limiting the log size could prevent logging to complete for the whole configured run time i.e.
`
`logging duration, which can be several hours. The log could fill the limited log buffer in the
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`2 5 UE before any measurement report has been possible to send to the network node. Before the
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`configured logging duration time has ended, the UE would stop the logging so that to only
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`allow the log size to be a single packet e.g. single RRC packet, and relevant measurements
`
`reports may not thereafter be logged. Also in the current MDT configuration a start time for the
`
`logging is not configurable. This means that for a prolonged logging campaign a long period
`
`3 0
`
`between logging instances may be needed in the MDT configuration, alternatively new MDT
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`P32817
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`4
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`configuration 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
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`5
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`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 overcomes at
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`10
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`least some of the above mentioned disadvantages and which allows multiple partial report
`
`messages to be sent.
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`In accordance with some example embodiments, a UE that has stored logged data i.e. logged
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`measurements that are bigger than a single transmission packet, i.e. report message, segments
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`the data and sends only a portion of the data that fits into a single report message, and also
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`15
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`indicates that more logged measurements exists at the UE.
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`In a first example of embodiment, there is disclosed a method in a network node for network
`
`based control of report 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 method comprises sending a request to the UE to start transmitting logged
`
`2 0 measurements in a report message. The network 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 measurements not yet transmitted, and if
`
`so, decides if the additional logged measurements need to be requested.
`
`In a second example of an embodiment there is disclosed a network node for network based
`
`2 5
`
`control of report 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 communications interface being configured
`
`to send a request to the UE to start transmitting logged measurements in a report message, and
`
`3 0
`
`to receive the report message comprising the logged measurements. The network node
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`P32817
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`5
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`processor circuit being configured to determine if the received report message comprises an
`
`indicator of additional logged measurements not yet transmitted; and if so, to decide if the
`
`additional logged measurements need to be requested.
`
`In a third example of an embodiment, there is disclosed a method in a User Equipment, UE, for
`
`5
`
`assisting in network based control of report messages in a wireless communications 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 is further configured to periodically
`
`perform radio condition measurements and store the periodically performed measurements in a
`
`UE buffer as logged measurements. The method comprising: receiving a request, in the UE,
`
`10
`
`from the network node to start transmitting logged measurements in a report message;
`
`determining if the logged measurements fit in the report message; and if not, 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 node as a response to
`
`the request.
`
`15
`
`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 UE
`
`is being in connection with a serving network node and is configured to transmit report
`
`messages to the network node. The UE is further configured to periodically perform radio
`
`condition measurements and store the periodically performed measurements in a buffer as
`
`2 0
`
`logged measurements. The UE comprises a UE communications interface and a UE processor
`
`circuit. The UE communications interface is configured to receive a request from the network
`
`node to start transmitting logged measurements in a report message, and to transmit the report
`
`message comprising the logged measurements. The UE processor circuit is configured to
`
`determine if the logged measurements fits in the report message, and if not, indicating in the
`
`2 5
`
`report message to be transmitted an existents of additional logged measurements not yet
`
`transmitted.
`
`An advantage achieved by some of the above mentioned embodiments is that due to use of
`
`indicator in report message of further remaining logged measurements providing the network,
`
`i.e. a network node, with information needed to decide a timing of transmission of the logged
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`3 0 measurements and a timing of when more logged measurements should be requested.
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`P32817
`
`6
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`Another advantage achieved by at least some of the above mentioned embodiments is to make
`
`it possible to have longer logging duration and/or conduct more frequent measurements
`
`without overflow in log memory in UE e.g. UE buffer.
`
`Another advantage achieved by some of the above mentioned embodiments is to provide the
`
`5
`
`network node with information about logged measurements making it 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 drawings in which reference characters refer to the
`
`10
`
`same parts throughout various views.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
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`The drawings are not necessarily to scale, emphasis instead being placed upon illustrating
`
`principles of the disclosure.
`
`Fig. 1
`
`Fig. 2
`
`Fig. 3
`
`Fig. 4
`
`Fig. 5
`
`Fig. 6
`
`15
`
`20
`
`25
`
`is a signaling scheme illustrating how logged measurements are reported
`according to prior art.
`
`is a schematic block diagram illustrating example embodiments of a network
`node and a user equipment.
`
`is a flowchart depicting an example embodiment of a method in a network node.
`
`is a flowchart depicting further example embodiments of a method in a network
`node.
`
`is a flowchart depicting an example embodiment of a method m a user
`equipment.
`
`is a flowchart depicting further example embodiments of a method in a network
`node.
`
`DETAILED DESCRIPTION
`
`Fig. 2 illustrates portions of an example embodiment of a communications system/network,
`
`and particularly portions of a Radio Access Network (RAN) 20 comprising at least one
`
`network node 28 and a wireless terminal, hereinafter denoted User Equipment, (UE) 30.
`
`Depending on a particular type of RAN utilized and delegation of nodal responsibilities, the
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`P32817
`
`7
`
`network node 28 may be a base station node e.g., an NodeB in UMTS or an eNodeB in Long
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`Term Evolution (LTE)) or a Radio Network Controller (RNC) node in UMTS. Thus, the UE
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`30 communicates over radio interface 32 with the network node 28, either directly over radio
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`interface 32 with the network node 28 in case of the network node 28 being a base station type
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`5
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`node, or over the radio interface 32 and through a base station in the case of the network node
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`28 being a radio network controller (RNC) node or an Mobility Management Entity (MME)
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`which is a control node which processes signaling between the UE and the Core Network (CN)
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`and provides Visitor Location Register (VLR) functionality for the Evolved Packet System
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`(EPS).
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`10 As mentioned above, the UE 30 can be a mobile station such as a mobile telephone ("cellular"
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`telephone) or laptop with wireless capability ( e.g., mobile termination), and thus can be, for
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`example, a portable, pocket, hand-held, computer-included, or car-mounted mobile device
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`which communicates voice and/or data via radio access network.
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`In accordance with one of its aspect, the technology disclosed concerns generation and/or
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`15
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`transmission and/or use of multiple partial report messages with logged measurements such as
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`MDT log packets, also denoted MDT log or MDT log data. As such, Fig. 2 shows an example
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`embodiment of network node 28 or UE 30, which comprises a UE communication interface 42
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`and a UE processor circuit 40. Note that the UE may be seen as a serving point. The UE
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`processor circuit may include a buffer 44, i.e. UE buffer, for storing logged measurements, not
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`2 0
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`shown in figure, and in another embodiment the buffer 44 is within the UE 30.
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`Fig. 2 also illustrates network node 28 as comprising a network node processor circuit 50 and
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`network node communications interface 52 (i.e. a communications interface of the network
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`node). The network node processor circuit 50 may be, or comprise, a logged measurements
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`requestor/processor (not shown in figure) to be used for requesting logged measurements, such
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`25
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`as MDT log, in report message(s).
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`According to one example of an embodiment, the network node 28 is used for network based
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`control of report messages comprising logged measurements in a wireless communications
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`network, the network node 28 being configured to serve the UE 30, UE, and to receive report
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`messages from the UE 30.
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`8
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`Continuing with the description of Fig. 2, the network node communications interface 52 is, or
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`may be, configured to send request(s) to the UE 30 to start transmitting logged measurement(s)
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`in report message(s), and to receive
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`the report message(s) comprising
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`the
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`logged
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`measurements. The logged measurements may compnse one or more of the following:
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`5 measurement time stamps for each performed measurement; UE buffer state condition;
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`positioning information of UE; periodically measured downlink pilot signal strength; serving
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`cell conditions; transmit power headroom conditions; paging channel failure(s ); maximum
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`required memory supported by UE; and broadcast channel failure(s).
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`According to one embodiment, the network node communications interface 52 may be
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`10
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`configured to receive, from the UE 30, an indication of existents of logged measurements that
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`are available. Note, that the "additional logged measurements" indicator is conveyed in the UE
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`information report message while the indication of logged measurements available is conveyed
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`in already existing/specified signaling.
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`According to one embodiment, the network node communications interface 52 may be
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`15
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`configured to request the report message( s) directly from the UE 3 0 or from another network
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`node, e.g. RNC, MME, RBS or other similar node.
`
`According to one embodiment, the network node communications interface 52 may be
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`configured to request the report message upon receiving a UE access request initiated by a UE
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`handover procedure from another network node to the network node. The request may for
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`2 0
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`example be a RRC connection request. The network node communications interface 52 may
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`also be configured to receive a network node message from the other network node i.e. another
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`eNodeB, RNC or RBS, comprising UE specific information. The UE specific information may
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`further comprise the indicator indicating additional logged measurements not yet transmitted.
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`The network node processor circuit 50, mentioned above in relation to Fig.2, is configured to
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`2 5
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`determine if the received report message( s) comprises an indicator of additional logged
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`measurement( s) not yet transmitted; and if so, to decide if the additional logged measurements
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`need to be requested. According to one embodiment, the network node processor circuit 50
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`may be configured to decide if the additional logged measurements need to be requested based
`
`on one or more of the following: interference level experienced in a cell; radio condition
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`3 0 measurements experienced in a cell; available radio resource; network node capacity; UE
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`buffer state condition etc.
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`According to one embodiment, the network node processor circuit 50 may be configured to
`
`determine if the indicator indicates that there are logged measurements in a UE buffer 44 that
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`do, or do not, fit in a single subsequent report message.
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`According to one embodiment, the network node processor circuit 50 may be configured to
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`5
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`decide to request all the logged measurements in the buffer 44 of the UE in one subsequent
`
`request, or repeatedly upon receiving each report message. The decision may also be based on
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`received status information of the buffer 44 in the UE 30 being for example overloaded. Note
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`that configured to or adapted to in relation to functionality of circuits and devices mentioned
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`above and throughout the whole disclosure are expressions that may be used having a similar
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`1 0
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`or same meamng.
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`It should be appreciated that the network node processor circuit 50 may comprise an MDT log
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`requestor/processor 50' (not shown in Fig. 2) which may be implemented in platform fashion,
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`e.g., implemented by a computer/processor executing instructions of non-transient signals
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`and/or by a circuit.
`
`15
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`Likewise from a UE perspective, reference made to Fig. 2, the UE 30 may be, or is, used for
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`assisting in network based control of report messages comprising logged measurements in a
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`wireless communications network. The UE 30 is being in connection with the serving network
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`node 28 and is configured to transmit report message(s) to the network node 30. The UE 30
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`may further be configured to periodically perform radio condition measurements and store the
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`2 0
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`periodically performed measurements in the buffer 44 as logged measurements. Such logged
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`measurements may be MDT log reports.
`
`The UE communications interface 42 mentioned above in relation to Fig. 2, is configured to
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`receive a request from the network node 28 to start transmitting logged measurements in report
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`message(s), and to transmit/send the report message(s) comprising the logged measurements.
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`2 5
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`The UE processor circuit 40 is configured to determine if the logged measurements fits in the
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`report message( s ), and if not, indicating in the report message to be transmitted an existents of
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`additional logged measurements not yet transmitted.
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`According to one embodiment of an example implementation of a UE 30 in which the UE
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`processor circuit 40 may be, or may comprise, a multiple partial MDT log reporter 40' (Fig. 2
`
`30
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`dashed lines). The multiple partial MDT log reporter 40' may comprise a log report generator
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`10
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`and data logging unit (not shown in Fig. 2). The multiple partial MDT log reporter 40' works
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`in conjunction with a measurement unit (not shown in Fig. 2), and stores records of
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`measurements in data logging unit. The log report generator may further comprise a packet
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`identifier generator and "more data" i.e. additional data, flag