Source: https://patents.google.com/patent/US9301180B2/en
Timestamp: 2019-12-14 01:00:40
Document Index: 165186219

Matched Legal Cases: ['Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 201180018747', 'Application No. 201180018810', 'Application No. 201180049175', 'Application No. 201180049175', 'Application No. 11741796', 'Application No. 11741797', 'Application No. 11154230', 'Application No. 11154233', 'Application No. 11154236', 'Application No. 11748834', 'Application No. 11741796', 'Application No. 11741797', 'Application No. 2011289488', 'Application No. 2011289489', 'Application No. 2011289488', 'Application No. 2011289489', 'Application No. 2013', 'Application No. 2013', 'Application No. 2013', 'Application No. 2013', 'Application No. 10', 'Application No. 10', 'Application No. 10', 'Application No. 10', 'Application No. 201180018733']

US9301180B2 - Methods and apparatus to perform measurements - Google Patents
Methods and apparatus to perform measurements Download PDF
US9301180B2
US9301180B2 US13/578,562 US201113578562A US9301180B2 US 9301180 B2 US9301180 B2 US 9301180B2 US 201113578562 A US201113578562 A US 201113578562A US 9301180 B2 US9301180 B2 US 9301180B2
US13/578,562
US20120309404A1 (en
Christopher Harris SNOW
Nazih Almalki
Ayman Ahmed Abdel-Samad
Xusheng Wei
2010-02-12 Priority to US30415710P priority Critical
2011-02-11 Priority to US13/578,562 priority patent/US9301180B2/en
2011-02-11 Priority to PCT/CA2011/050079 priority patent/WO2011097729A1/en
2011-02-11 Application filed by BlackBerry Ltd filed Critical BlackBerry Ltd
2012-11-09 Assigned to RESEARCH IN MOTION JAPAN LIMITED reassignment RESEARCH IN MOTION JAPAN LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SUZUKI, TAKASHI
2012-11-09 Assigned to RESEARCH IN MOTION UK LIMITED reassignment RESEARCH IN MOTION UK LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BURBIDGE, RICHARD, WEI, XUSHENG, YOUNG, GORDON
2012-11-09 Assigned to RESEARCH IN MOTION LIMITED reassignment RESEARCH IN MOTION LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ABDEL-SAMAD, AYMAN AHMED, ALMALKI, NAZIH, ARORA, DINESH KUMAR, SNOW, CHRISTOPHER HARRIS
2012-12-06 Publication of US20120309404A1 publication Critical patent/US20120309404A1/en
2016-01-28 Assigned to RESEARCH IN MOTION LIMITED reassignment RESEARCH IN MOTION LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RESEARCH IN MOTION JAPAN LIMITED
2016-01-28 Assigned to RESEARCH IN MOTION LIMITED reassignment RESEARCH IN MOTION LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RESEARCH IN MOTION UK LIMITED
2016-03-29 Publication of US9301180B2 publication Critical patent/US9301180B2/en
2016-05-20 Assigned to BLACKBERRY LIMITED reassignment BLACKBERRY LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BLACKBERRY JAPAN LIMITED
238000005259 measurements Methods 0 abstract claims description title 232
238000000034 methods Methods 0 claims description 154
230000003213 activating Effects 0 claims description 94
230000000737 periodic Effects 0 description 12
Methods and apparatus to perform measurements are disclosed. An example method disclosed herein for a user equipment (UE) to perform measurements comprises receiving configuration information from a network, the configuration information to configure the UE to perform logging of measurements in an idle mode, logging measurements in the idle mode, and sending an indication that logged measurements are available.
Various MDT measurements to be performed by commercial UEs in the MDT measurement framework have been proposed. Examples of such proposed MDT measurements include a periodic downlink pilot measurement, a serving cell becomes worse than threshold measurement, a transmit power headroom becomes less than threshold measurement, a random access failure measurement, and a radio link failure report. Although each such proposed measurement is to include location information to enable a network to determine where the measurement was performed, the techniques for determining such location information without unduly impacting the UE's battery life, using radio communication resources, incurring core network delays, etc., or any combination thereof, are still to be defined. In contrast to the proposals, the example methods and apparatus disclosed herein implement location determination techniques having specified activation, deactivation and other operating conditions that reduce the impact on UE battery life, reduce the use of radio communication resources and limit the need to access the core network.
Additionally, measurement configuration for MDT can include positioning request criteria and one or more positioning request modes (also referred to as location request modes). For example, the positioning request criteria can include an event identity (or descriptor) and triggering condition. Example event identities include “back to coverage,” “the serving cell signal strength or quality becomes worse than threshold,” etc., and example triggering conditions include location request probability factor, positioning capabilities, a reporting range (e.g., such as a required outage duration range), an access class, etc. In at least some example implementations, the network includes the probability factor as a triggering condition to reduce the number of location requests. In such examples, upon detection of an event corresponding to a configured event identity, the UE 105 draws a random number. If the random number is lower than the probability factor (or, alternatively, higher than the probability factor) the UE is not allowed to initiate location request procedure. In at least some example implementations, the network also indicates at least one of a required positioning capability, a required access class or a required outage duration range as further ways to limit the number of location requests. For example, if the UE's positioning capabilities do not match the indicated positioning capabilities or the UE's access class does not match the indicated access class, the UE 105 is not allowed to initiate a location procedure for MDT. Also, if the detected event is out of coverage and the duration of out of coverage is not within the configured outage duration range, the UE 105 is not allowed to initiate a location request for MDT. By using a required outage duration range, location requests associated with short lived (e.g., shorter than the required duration range) or prolonged (e.g., longer than the required duration range) coverage problems (e.g., such as being in an elevator or watching television in a basement) can be prevented to reduce network loading.
An example User-Plane (U-Plane) architecture 200 for implementing an MDT framework in the 3GPP communication system 100 of FIG. 1 is illustrated in FIG. 2. The U-Plane architecture 200 of FIG. 2 also illustrates involvement of the operator's core network to implement the MDT framework. The U-Plane architecture 200 corresponds to an E-UTRAN implementation and includes the UE 105 and an eNB 205 implementing the current cell 110. Portions of the operator's core network involved in the MDT framework include a network manager 210 and a gateway 215 implementing, for example, a packet data network (PDN) gateway and a serving gateway to communicatively couple the eNB 210 to the operator's Internet protocol (IP) network 220.
At block 628, the measurement performance processor 410 evaluates one or more MDT location request criteria specified in the MDT configuration information obtained at block 604. In an example implementation, if one or more of the location request criteria are met (block 628) or, in another example implementation, if all location request criteria are met (block 628), then at block 632 the measurement performance processor 410 performs positioning measurements and/or requests location information from the network as specified by the MDT configuration information obtained ay block 604. At block 636, the measurement performance processor 410 evaluates one or more MDT measurement deactivation criteria specified in the MDT configuration information obtained at block 604. In an example implementation, if none of the deactivation criteria are met (block 636) or, in another example implementation, if all of the deactivation criteria are not met (block 636), MDT measurement processing continues and, in the illustrated example, the process 600 returns to block 604 to allow the UE 105 to obtain new/updated MDT configuration information (if present). Otherwise, MDT measurements are deactivated, as well as logging and reporting in at least some example implementations, and the process 600 ends until its next invocation.
An example process 800 that may be performed by the UE 105 to determine MDT cell selection/reselection measurements (e.g., also referred to as camping measurement) is illustrated in FIGS. 8A-B. The process 800 may be used to implement at least portions of the generic process 600 of FIG. 6. If MDT cell selection/reselection measurement and logging is enabled by the network, the UE 105 is configured according to the process 800 to perform PDP measurements, when in idle mode, periodically or when cell selection/reselection is performed. Additionally, the UE 105 is configured to measure and log/report any, some or all of the following information to the network: (1) a camped state (e.g., limited or normal); (2) a mobility state (e.g., normal/medium/high); (3) a priority or priorities of the camped on or serving cell and a particular (e.g., specified) number of best neighboring cells; (3) any barred and reserved status of a particular (e.g., specified) number of strongest cells; (5) a particular (e.g., specified) number of strongest not-allowed closed subscription group (CSG) cells, etc. Furthermore, the network configures the duration and certain conditions under which cell selection/reselection measurement and logging is to be performed by the UE 105 to, for example, reduce the probability that the amount of logging information overflows the UE's memory capacity.
Returning to FIG. 8A, if an out of coverage activation threshold is configured (block 804), the UE 105 is to perform PDP measurements when the UE 105 is losing coverage, such as when the UE 105 transitions from normal camping to an under coverage condition (e.g., limited camping), or from an under coverage condition to an out of coverage condition. As such, if an out of coverage threshold is configured (block 804), the UE 105 determines whether the camped on cell is the only suitable cell (block 806). If the camped on cell is the only suitable cell (block 806) and if the camped on cell's signal strength, signal quality, or both, become worse than the corresponding configured threshold value(s) (block 808), the UE 105 starts a timer (block 810), and initiates PDP measurements and logging (block 812). The timer is employed at block 810 to allow the UE 105 to perform MDT measurements when initially entering an out of coverage condition or the radio condition begins to improve, but to prevent the UE 105 from continuing to perform such MDT measurements (and potentially wasting battery life and resources unnecessarily in the process) if the UE 105 remains out of coverage or experiences improved radio conditions for an extended period of time. At some time later, if at least one of the signal strength or the signal quality of the camped on cell becomes worse than the first out of coverage threshold value described above, or better than the second out of coverage threshold value described above (block 816) or the timer expires (block 818), the UE 105 stops the timer, measurements and logging (block 820).
Additionally or alternatively, if a back to coverage threshold is configured (block 828 of FIG. 8B), the UE 105 is to perform PDP measurements when the UE 105 returns to coverage after being in a limited camping or out of coverage state (e.g., such as returning to normal camping from limited camping, or returning to an under coverage state from being out of coverage) (block 830). As such, if the UE 105 is in a limited camping or out of coverage state (block 830), and the UE 105 finds a candidate for a suitable cell (block 832) and the suitable cell's signal strength, signal quality, or both, become better than the corresponding configured back to coverage activation threshold(s) (block 834), the UE 105 starts a timer (block 836), and initiates PDP measurements and logging (block 836). At some time later, if the cell found at block 832 turns out not to be suitable (block 840), or if the signal strength and/or signal quality of the candidate cell becomes better than the first back to coverage threshold value described above or the signal strength and/or signal quality of all candidate cells become worse than the second back to coverage threshold value described above (block 842), or if the timer expires (block 844), the UE 105 stops the timer, measurements and logging (block 846).
A first example process 1000 that may be performed by the UE 105 to implement MDT mobility measurements is illustrated in FIG. 10. The process 1000 measures reselections between radio access technologies (RATs) (i.e., inter-RAT reselections), and may be used to identify problematic regions exhibiting, for example, ping-pong problems in which the UE 105 transitions excessively among RATs. The process 1000 may be used to implement at least portions of the generic process 600 of FIG. 6. Turning to FIG. 10, the process 1000 begins at block 1004 at which the UE 105 obtains MDT measurement configuration information which includes an excessive inter-RAT reselection activation threshold (e.g., to be used as an activation condition), a specified duration of measurement and logging (e.g., to be used as a deactivation condition), one or more excessive inter-RAT reselection deactivation thresholds, one or more location request criteria (e.g., such as one or more trigger conditions), a positioning method indication, etc. Then, at block 1008, the UE 105 counts a number of RAT changes per a unit of time (e.g., because the excessive inter-RAT reselection activation threshold was included in the configuration information). If the counted number of RAT changes exceeds the activation threshold value (block 1012), the UE 105 starts a timer (block 1016), and initiates PDP measurement and logging (block 1020). Although not shown, the UE's mobility status (e.g., motion, velocity, etc.) may also be considered when determining the threshold for triggering the counting of RAT changes at block 1008.
A second example process 1100 that may be performed by the UE 105 to implement MDT mobility measurements is illustrated in FIG. 11. The process 1100 measures intra-RAT (intra-frequency or inter-frequency) cell reselections, and may be used to identify problematic regions exhibiting, for example, ping-pong problems in which the UE 105 transitions excessively among cells in a particular RAT. The process 1100 may be used to implement at least portions of the generic process 600 of FIG. 6. Turning to FIG. 11, the process 1100 begins at block 1104 at which the UE 105 obtains MDT measurement configuration information including one or more excessive cell reselection activation thresholds (e.g., to be used as activation conditions, and which could include different thresholds for intra-frequency vs. inter-frequency cell reselections), a specified duration of measurement and logging (e.g., to be used as a deactivation condition), one or more excessive cell reselection deactivation thresholds, one or more location request criteria (e.g., such as one or more trigger conditions), a positioning method indication, etc. Then, at block 1108, the UE 105 counts a number of cell reselections per a unit of time (e.g., because an excessive cell reselection activation threshold was included in the configuration information). If the counted number of cell reselections exceeds the activation threshold value (block 1112), the UE 105 starts a timer (block 1116), and initiates PDP measurement and logging (block 1120). Although not shown, the UE's mobility status (e.g., motion, velocity, etc.) may also be considered when determining the threshold for triggering the counting of cell reselections at block 1108.
If the probability factor is the only criterion used for establishing the RRC connection, a UE near the center of the cell may establish a connection if the random number generated by the UE is higher (or, alternatively, lower) than the specified probability factor. However, a UE near the center of the cell may not be helpful for use in identifying a coverage problem. To cause measurements to be performed mostly by UEs near a cell's edge, in addition to the probability factor, the network may provide threshold values for signal strength, signal quality, path loss, etc., in the configuration information obtained at block 1404 to generally allow only UEs near the cell edge to be able to establish RRC connections for MDT measurement reporting. For example, if a signal strength threshold is configured, the UE 105 measures the signal strength of the serving cell or the camped on cell. If the measurement is better than the threshold (block 1428), the UE 105 will not initiate a RRC connection; otherwise, the UE 105 may be permitted to initiate the RRC connection (block 1424), possibly dependent upon other criteria. For example, the network may also specify a required positioning capability, for example, assisted GPS, OTDOA, etc., in the configuration information obtained at block 1404. If the UE 105 does not have the specified capability (block 1432), the UE 105 will not initiate a RRC connection; otherwise the UE 105 initiates an RRC connection (block 1424).
Another advantage of the preceding positioning measurement techniques is that the positioning technique for MDT purposes can be selected based on the UE's positioning capability. For example, if the UE 105 and the network both support UE-assisted GPS, UE-based GPS and OTDOA, the network could select OTDOA over UE-assisted GPS over UE-based GPS depending upon the amount of assistance data required and the expected time that has elapsed from a first positioning fix.
Next, at block 1522 the network determines whether a second MDT configuration or normal radio resource management (RRM) positioning measurements should be performed. IF normal RRM positioning is to be performed, the network configures the appropriate RRM measurements and the process ends (not shown in the figure). If the network decides to perform the second MDT configuration for MDT positioning measurements, the network may include positioning/location request criteria in the MDT configuration depending upon the serving cell and the positioning capability of the UE 105. If assistance data is required (block 1526), the network delivers the assistance data to the UE 105 (represented as block 1626 in FIG. 16). In order to reduce loading of the network, the RAN 1605 (e.g., such as the eNB 305 in LTE or an RNC in UTRAN) may cache assistance data temporarily at each or a subset of cells. If valid assistance data is available for the UE 105 in the RAN 1605 (block 1530), the assistance data is provided to the UE via an assistance data transfer 1634 from the RAN's cache (block 1534). Otherwise, the network requests new assistance data via an assistance data transfer 1638 from the CN 1610 (e.g., from the SMLC or RNC in UTRAN or from the E-SLMC in EPC/LTE using LTE positioning protocol A (LPPa)) to the RAN 1605, which then delivers the assistance data to the UE 105 (block 1538).
For coverage optimization, an operator's primary interest is likely to be macro (i.e., outdoor) coverage. As such, in some example scenarios, MDT measurements and logging or reporting should be avoided when the UE 105 is indoors, and/or the eNB 305 or the MDT network manager 310 should be able to avoid or filter measurement data corresponding to operation of the UE 105 indoors. An example process 2000 that may be performed by the UE 105 to perform such indoor filtering is illustrated in FIG. 20. The process 2000 may be used to implement at least portions of the generic process 600 of FIG. 6. For indoor filtering using the process 2000, the UE 105 receives configuration information as described above (block 2004). The UE 105 then determines whether user defined presence information, such as an at-work or an at-home user-selectable operating mode, may be utilized to distinguish whether the UE 105 is operating indoors (block 2008). Additionally or alternatively, the UE 105 may determine it is operating indoors if the UE 105 receives WiFi signals whose reception level is higher than a threshold value (block 2012). The threshold value may be included in the configuration information obtained at block 2004. In the case of operator network indoor coverage, smaller size base stations are often used and their transmission power may be configured smaller than that of macro base stations. An operators may indicate (e.g., via the configuration information obtained at block 2004) a threshold value of the transmission power of such an indoor base station. The UE 105 may determine it is operating indoors if the threshold value is lower than the transmission power indicated in the system information of the camped on cell or the serving cell (block 2016). When the UE 105 determines it is operating indoors (block 2020), the UE 105 rejects or ignores the configuration of MDT measurement and logging or does not establish an RRC connection to report logged MDT measurements (block 2024). Conversely, when the UE 105 determines it is not operating indoors (block 2028), the UE 105 performs MDT measurement and logging or does establish an RRC connection to report logged MDT measurements (block 2032).
It will be readily appreciated that the UE 105 can be configured to perform any, some, all or portions of the processes illustrated in FIGS. 6, 8A-B, 10-12, 14, and 17-21. Similarly, it will be appreciated that a network element providing base station functionality, such as the eNB 305, can be configured to perform any, some, all or portions of the processes illustrated in FIGS. 7, 13 and 15.
TABLE 1 IE No IE Name Explanation 1. Validity state States in which this configuration is valid, for example, idle mode, connected mode, etc. 2.1 Activation Conditions If one or more conditions shown below are (Measurement Threshold Values, satisfied the UE activates the measurement and etc) logging/reporting 2.1.1 Target area Target area for MDT measurement. The area may be specified as a list of cells, URAs, LAs, RAs or TAs. In the case of a list of cells, the cells are specified by at least one of physical cell identity, global cell id, frequency and RAT (Radio Access Technology). 2.1.2 Activating threshold going out of Threshold values to activate MDT measurement coverage and logging when the UE goes out of coverage area. The threshold could be at least one of signal strength or quality, such as CPICH RSCP and CPICH Ec/Io for UTRA frequency division duplex (FDD), or RSRP and RSRQ for E-UTRA. Different threshold values may be specified depending on the UE mobility state. 2.1.3 Activating threshold back to Threshold values to activate measurement and coverage logging when the UE moves back to coverage area. The threshold could be at least one of signal strength or quality, such as CPICH RSCP and CPICH Ec/Io for UTRA FDD, or RSRP and RSRQ for E-UTRA. Different threshold values may be specified depending on the UE mobility state. 2.1.4 Activating threshold for excessive The threshold value is a number of cell reselections intra frequency cell reselections per unit of time to start measurement and logging. Different threshold values may be specified depending on the UE mobility state. 2.1.5 Activating threshold for excessive The threshold value is a number of cell reselections inter frequency cell reselections per unit of time to start measurement and logging. Different threshold values may be specified depending on the UE mobility state. 2.1.6 Activating threshold for excessive The threshold value is a number of cell reselections inter RAT frequency cell per unit of time to start measurement and logging. reselections Different threshold values may be specified depending on the UE mobility state. 2.1.7 Measurement probability factor When measurement configuration is performed in idle mode, the UE draws a random number. If the number is less (or, alternatively, more) than the measurement probability factor, the UE ignores the measurement configuration. 2.1.8 Positioning capabilities When measurement configuration is performed in idle mode, if the UE positioning capabilities do not match the indicated positioning capabilities, the UE ignores the measurement configuration. 2.1.9 Access classes When measurement configuration is performed in idle mode, if the access class of the UE does not match the indicated access classes, the UE ignores the measurement configuration. 2.2 Deactivation Conditions If one or more conditions shown below are (Measurement Threshold Values, satisfied the UE deactivates the measurement and etc) logging/reporting 2.2.1 Target area Target area for MDT measurement. The area may be specified as a list of cells, URAs, LAs, RAs or TAs. In the case of a list of cells, the cells are specified by at least one of physical cell identity, global cell id, frequency and RAT (Radio Access Technology). 2.2.2 First and second deactivating Threshold values to deactivate measurement and threshold going out of coverage logging when the UE goes out of overage area. The threshold could be at least one of signal strength or quality, such as CPICH RSCP and CPICH Ec/Io for UTRA FDD, or RSRP and RSRQ for E-UTRA. Different threshold values may be specified depending on the UE mobility state. 2.2.3 First and second deactivating Threshold values to deactivate measurement and threshold back to coverage logging when the UE moves back to overage area. The threshold could be at least one of signal strength or quality, such as CPICH RSCP and CPICH Ec/Io for UTRA FDD, or RSRP and RSRQ for E-UTRA. Different threshold values may be specified depending on the UE mobility state. 2.2.4 First and second threshold for The threshold value is a number of cell reselections excessive intra frequency cell per unit of time to stop measurement and logging. reselections Different threshold values may be specified depending on the UE mobility state. 2.2.5 First and second threshold for The threshold value is a number of cell reselections excessive inter frequency cell per unit of time to stop measurement and logging. reselections Different threshold values may be specified depending on the UE mobility state. 2.2.6 First and second threshold for The threshold value is a number of cell reselections excessive inter-RAT frequency cell per unit of time to stop measurement and logging. reselections Different threshold values may be specified depending on the UE mobility state. 2.2.7 Duration of measurement and In seconds (e.g., 0, 5, 10, 30, 60, 120, 300, 600, logging 1800). 2.2.8 Delete on deactivation If configured, the UE deletes measurements recorded from its log since the corresponding activation if the deactivation condition with the first deactivation threshold is satisfied. 3. Reporting Criteria If one or more criteria or all of the criteria shown below are satisfied the UE establish RRC connection with indication of MDT measurement. 3.1 Event identity (or event descriptor) One or more of the following: “out of coverage”, “limited camping”, “in target geographic area”, “exceeding number of cell reselections” 3.2 Reporting range (upper and/or For example, if duration of being out of coverage is lower limits) not within the specified range, the UE does not report the measurements, and may delete the measurements. 3.3 Reporting probability factor When a configured event occurs, the UE draws a random number. If the number is less (or, alternatively, more) than the reporting probability factor, the UE ignores the measurement configuration. Otherwise, the UE reports measurements to the network 3.4 Positioning capabilities If the UE positioning capabilities do not match the indicated positioning capabilities, the UE does not report measurements to the network 3.5 Access classes If the access class of the UE does not match the indicated access classes, the UE does not report measurements to the network. 3.6 Indoor The value is set to enable or disable indoor filtering. If indoor filtering is enabled, the UE may not initiate RRC connection establishment if the UE detects it is operating indoors 3.7 Indoor transmission power Indoor condition may be specified as transmission power of the base station. 3.8 Delete if not meeting reporting If configured, the UE deletes measurements taken criteria since the corresponding activation if one or more reporting criteria are not satisfied 4. Location Request Criteria and If one or more criteria or all of the criteria shown Mode below are satisfied the UE establishes RRC connection with indication of MDT positioning or initiates MO-LR procedure 4.1 Event identity (or event descriptor) One or more of the following: No event if entering area specified in 1; Entering coverage area; Exceeding cell reselection thresholds; or at least one of the signal strength and quality become worse than thresholds. 4.3 Positioning probability factor The threshold the UE compares with a random number the UE draws to decide whether it should establish an RRC connection for MDT, initiate a mobile originating location request etc. 4.4 Reporting range (upper and/or If the event identity (descriptor) is radio condition, lower limits) the reporting range contains threshold values. If the event identity (descriptor) is entering coverage area, the reporting range contains duration of out of coverage. If the radio condition is worse than the thresholds or the duration of out of coverage is within the required range, the UE may initiate an RRC connection procedure or MO-LR. 4.5 Positioning capabilities If the UE supports the specified positioning methods, the UE may initiate RRC connection procedure or location request 4.6 Indoor The value is set to enable or disable indoor filtering. If indoor filtering is enabled, the UE may not initiate RRC connection establishment or MO- LR for MDT purpose if the UE detects it is operating indoors 4.7 Indoor transmission power Indoor condition may be specified in transmission power of the base station. If the transmission power of the base station indicated in the system information is lower than this value, the UE may not initiate RRC connection procedure or MO-LR for MDT purpose. 4.8 Positioning request mode One or more of “MO-LR for assistance data”, “MO-LR for positioning measurement” and “RRC connection establishment” 5. Positioning Measurement Configuration 5.1 Positioning measurement Measurement control information for positioning. Positioning methods, neighboring cells, QoS, periodicity of measurements, Validity (idle, CELL_PCH or URA_PCH state, going out of coverage, coming back to coverage, etc) 5.2 Assistance data For example, Ephemeris and timing correction information of the visible satellites for GPS/GNSS 5.3 Validity of assistance data The area where the assistance data is valid. The area may be specified as a list of cells, URAs. Default is the serving cell or the camped on cell. 6. Reporting Reporting mode Immediate or recording. Default is immediate or recording.
The system 2200 of the instant example includes a processor 2212 such as a general purpose programmable processor. The processor 2212 includes a local memory 2214, and executes coded instructions 2216 present in the local memory 2214 and/or in another memory device. The processor 2212 may execute, among other things, machine readable instructions to implement the processes represented in FIGS. 6, 7, 8A-B, 10-15, and 17-21. The processor 2212 may be any type of processing unit, such as one or more microprocessors from the Intel® Centrino® family of microprocessors, the Intel® Pentium® family of microprocessors, the Intel® Itanium® family of microprocessors, and/or the Intel XScale® family of processors, one or more microcontrollers from the ARM® family of microcontrollers, the PIC® family of microcontrollers, etc. Of course, other processors from other families are also appropriate.
1. A method for a user equipment (UE) to perform measurements, the method comprising:
receiving, via radio resource control (RRC) messaging, from a network, configuration information including activation criteria and location request criteria, wherein the activation criteria identifies conditions for the UE to perform logging of signal strength measurements for network transmission, and the location request criteria identifies conditions for the UE to perform positioning measurements, the configuration information further including deactivation criteria and log discarding criteria, wherein the deactivation criteria identifies conditions for the UE to stop measuring signal strength for the network transmission, and the log discarding criteria identifies conditions for the UE to discard logged measurements;
in response to detecting the activation criteria and the location request criteria:
determining logging of signal strength for the network transmission and corresponding positioning measurements of the UE; and
logging periodically the signal-strength measurements with the positioning measurements.
2. A non-transitory machine readable storage device or storage disk comprising machine readable instructions which, when executed, cause a machine to perform the method defined in claim 1.
3. A method as defined in claim 1 wherein the activation criteria includes a first threshold.
4. A method as defined in claim 3 wherein the activation criteria comprises activating the logging of signal strength measurements when at least one of a downlink pilot signal strength, a downlink pilot signal quality or another evaluated metric becomes worse than the first threshold.
5. A method as defined in claim 1 further comprising activating the performance of the positioning measurements based on an activation condition included in the configuration information received from the network.
in response to detecting the deactivation criteria, deactivating logging of signal strength measurements for the network transmission; and
in response to detecting the log discarding criteria, discarding logged measurements.
7. A method as defined in claim 1 wherein the deactivation criteria includes at least one of a duration or a second threshold.
8. A method as defined in claim 1 wherein the activating of the positioning measurements occurs while the UE is in idle mode.
preparing configuration information to configure a user equipment (UE) to perform signal strength measurements and positioning measurements, the configuration information including activation criteria and location request criteria, wherein the activation criteria identifies conditions for the UE to perform logging of signal strength measurements for network transmission, and the location request criteria identifies conditions for the UE to perform positioning measurements, the configuration information further including deactivation criteria and log discarding criteria, wherein the deactivation criteria identifies conditions for the UE to stop measuring signal strength for the network transmission, and the log discarding criteria identifies conditions for the UE to discard logged measurements; and
sending the configuration information, via radio resource control (RRC) messaging, to the UE.
10. A method as defined in claim 9 wherein the activation criteria includes a first threshold.
11. A method as defined in claim 10 wherein the UE is to activate the logging of signal strength measurements when at least one of a downlink pilot signal strength, a downlink pilot signal quality or another evaluated metric becomes worse than the first threshold.
12. A method as defined in claim 9 wherein the message provides configuration information for the UE to activate the positioning measurements while the UE is in idle mode.
13. A non-transitory machine readable storage device or storage disk comprising machine readable instructions which, when executed, cause a machine to perform the method defined in claim 9.
14. A method as defined in claim 9 wherein the configuration information further includes an activation configuration to cause the UE to activate the performance of the positioning measurements.
15. An apparatus to perform measurements comprising:
process configuration information received from a network via radio resource control (RRC) messaging, the configuration information to configure a user equipment (UE) to perform logging of signal strength measurements and positioning measurements, the configuration information including activation criteria and location request criteria, wherein the activation criteria identifies conditions for the UE to perform logging of signal strength measurements for network transmission, and the location request criteria identifies conditions for the UE to perform positioning measurements, the configuration information further including deactivation criteria and log discarding criteria, wherein the deactivation criteria identifies conditions for the UE to stop measuring signal strength for the network transmission, and the log discarding criteria identifies conditions for the UE to discard logged measurements;
determine logging of signal strength for the network transmission and corresponding positioning measurements of the UE; and
log periodically signal-strength measurements with the positioning measurements; and
a memory to store the configuration information.
16. An apparatus as defined in claim 15 wherein the activation criteria includes a first threshold.
17. An apparatus as defined in claim 16 wherein the processor is to activate the logging of signal strength measurements when at least one of a downlink pilot signal strength, a downlink pilot signal quality or another evaluated metric becomes worse than the first threshold.
18. An apparatus as defined in claim 15 wherein the processor is to activate the performance of the positioning measurements while the UE is in idle mode.
19. An apparatus as defined in claim 15 wherein the processor is further configured to activate the performance of the positioning measurements based on an activation condition included in the configuration information received from the network.
20. An apparatus as defined in claim 15 wherein the processor is further configured to:
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CN102860062A (en) 2013-01-02
EP2360960A3 (en) 2011-11-16
EP2360960A2 (en) 2011-08-24
EP2534869A1 (en) 2012-12-19
CN102860062B (en) 2016-12-21
EP2360960B1 (en) 2017-10-04
EP2534869A4 (en) 2013-07-10
US20120309404A1 (en) 2012-12-06
CA2789501C (en) 2017-12-05
CA2789501A1 (en) 2011-08-18
WO2011097729A1 (en) 2011-08-18
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