Measurement report prohibit timer for measurements of signals originating from two different cells or beams
阅读说明：本技术 用于对源自两个不同小区或波束的信号的测量的测量报告禁止计时器 (Measurement report prohibit timer for measurements of signals originating from two different cells or beams ) 是由 赫尔卡-丽纳·马塔内 于 2018-05-02 设计创作，主要内容包括：根据一些实施例,一种在无线设备中限制测量报告的传输的方法,包括：接收针对事件类型的第一测量触发事件。该第一测量触发事件与第一无线信号相关联。该方法还包括：针对第一测量触发事件发射测量报告；针对该事件类型启动测量报告限制过程；以及接收针对该事件类型的第二测量触发事件。第二测量触发事件与不同于第一无线信号的第二无线信号相关联。该方法还包括：确定测量报告限制过程对该事件类型是激活的,并且确定针对第二测量触发事件不发射测量报告。在一些实施例中,该无线设备包括无人飞行器(UAV)。(According to some embodiments, a method of limiting transmission of measurement reports in a wireless device, comprising: a first measurement trigger event for an event type is received. The first measurement trigger event is associated with a first wireless signal. The method further comprises the following steps: transmitting a measurement report for a first measurement trigger event; initiating a measurement report restriction procedure for the event type; and receiving a second measurement trigger event for the event type. The second measurement trigger event is associated with a second wireless signal different from the first wireless signal. The method further comprises the following steps: a measurement report restriction procedure is determined to be active for the event type and no measurement report is determined to be transmitted for a second measurement triggering event. In some embodiments, the wireless device comprises an Unmanned Aerial Vehicle (UAV).)
1. A method of limiting transmission of measurement reports in a wireless device, the method comprising:
receiving (312) a first measurement trigger event for an event type, the first measurement trigger event being associated with a first wireless signal;
transmitting (314) a measurement report for the first measurement trigger event;
initiating (316) a measurement report restriction procedure for the event type;
receiving (318) a second measurement trigger event for the event type, the second measurement trigger event being associated with a second wireless signal different from the first wireless signal;
determining (320) whether the measurement reporting restriction procedure is active for the event type; and
upon determining that the measurement report restriction procedure is active for the event type, determining (322) not to transmit a measurement report for the second measurement triggering event.
2. The method of claim 1, wherein starting (316) the measurement report restriction procedure for the event type comprises starting a timer.
3. The method of claim 2, wherein determining (320) whether the measurement report restriction procedure is active for the event type comprises: determining whether the timer has expired.
4. The method of claim 1, wherein initiating (316) the measurement report restriction procedure for the event type comprises: the counter is reset.
5. The method of claim 4, wherein:
determining (320) whether the measurement reporting restriction procedure is active for the event type comprises: determining whether the counter is below a threshold; and
upon determining that the measurement report restriction procedure is active for the event type, the method further comprises: the counter is incremented.
6. The method according to any one of claims 1-5, further comprising:
transmitting (314) a measurement report for the second measurement triggering event upon determining that the measurement report restriction procedure is not active for the event type.
7. The method according to any one of claims 1-6, further including: a measurement report restriction procedure configuration is received (310).
8. The method of claim 7, wherein the measurement report restriction procedure configuration comprises at least one of a timer value or a counter threshold value.
9. The method of any of claims 1-8, wherein the first wireless signal originates from a first cell and the second wireless signal originates from a second cell different from the first cell.
10. The method of any of claims 1-8, wherein the first wireless signal comprises a first beamformed wireless signal and the second wireless signal comprises a second beamformed wireless signal.
11. The method of any of claims 1-10, wherein the wireless device comprises an unmanned aerial vehicle.
12. A wireless device (110) comprising processing circuitry (620), the processing circuitry operable to:
receiving a first measurement trigger event for an event type, the first measurement trigger event associated with a first wireless signal;
transmitting a measurement report for the first measurement trigger event;
initiating a measurement report restriction procedure for the event type;
receiving a second measurement trigger event for the event type, the second measurement trigger event associated with a second wireless signal different from the first wireless signal;
determining whether the measurement report restriction procedure is active for the event type; and
determining not to transmit a measurement report for the second measurement triggering event upon determining that the measurement report restriction procedure is active for the event type.
13. The wireless device of claim 12, wherein the processing circuit is operable to: starting the measurement report restriction procedure for the event type by starting a timer.
14. The wireless device of claim 1, wherein the processing circuit is operable to: determining whether the measurement report restriction procedure is active for the event type by determining whether the timer has expired.
15. The wireless device of claim 12, wherein the processing circuit is operable to: initiating the measurement report restriction procedure for the event type by resetting a counter.
16. The wireless device of claim 15, wherein the processing circuit is operable to:
determining whether the measurement report restriction procedure is active for the event type by determining whether the counter is below a threshold; and
incrementing the counter upon determining that the measurement report restriction procedure is active for the event type.
17. The wireless device of any of claims 12-16, the processing circuitry further operable to:
transmitting a measurement report for the second measurement trigger event upon determining that the measurement report restriction procedure is not active for the event type.
18. The wireless device of any of claims 12-17, the processing circuitry further operable to: a measurement report restriction procedure configuration is received.
19. The wireless device of claim 18, wherein the measurement report restriction procedure configuration comprises at least one of a timer value or a counter threshold value.
20. The wireless device of any of claims 12-19, wherein the first wireless signal originates from a first cell and the second wireless signal originates from a second cell different from the first cell.
21. The wireless device of any of claims 12-19, wherein the first wireless signal comprises a first beamformed wireless signal and the second wireless signal comprises a second beamformed wireless signal.
22. The wireless device of any of claims 12-21, wherein the wireless device comprises an unmanned aerial vehicle.
23. A method of restricting transmission of measurement reports in a network node, the method comprising:
transmitting (412) a measurement report restriction procedure configuration to the wireless device; and
receiving (414) a measurement report from the wireless device, the measurement report comprising an indication of a number of times the wireless device did not transmit a measurement report for the triggered event type.
24. The method of claim 23, wherein the measurement report restriction procedure configuration comprises at least one of a timer value or a counter threshold value.
25. The method of any of claims 23 to 24, wherein the wireless device comprises an unmanned aerial vehicle.
26. The method of claim 25, further comprising: determining (416) whether the UAV is airborne based on the received indication of the number of times measurement reports have not been transmitted for the triggered event type.
27. A network node (120) comprising processing circuitry (720), the processing circuitry operable to:
transmitting a measurement report restriction procedure configuration to the wireless device (110); and
receiving a measurement report from the wireless device, the measurement report including an indication of a number of times the wireless device did not transmit a measurement report for the triggered event type.
28. The network node of claim 27, wherein the measurement report restriction procedure configuration comprises at least one of a timer value or a counter threshold value.
29. The network node of any of claims 27-28, wherein the wireless device comprises an unmanned aerial vehicle.
30. The network node of claim 29, the processing circuit further operable to: determining whether the UAV is airborne based on the received indication of the number of times measurement reports have not been transmitted for the triggered event type.
31. A wireless device (110) comprising a receiving module (650), a determining module (652) and a transmitting module (656);
the receiving module is operable to: receiving a first measurement trigger event for an event type, the first measurement trigger event associated with a first wireless signal;
the transmitting module is operable to: transmitting a measurement report for the first measurement trigger event;
the determination module is operable to: initiating a measurement report restriction procedure for the event type;
the receiving module is further operable to: receiving a second measurement trigger event for the event type, the second measurement trigger event associated with a second wireless signal different from the first wireless signal;
the determination module is further operable to:
determining whether the measurement report restriction procedure is active for the event type; and
determining not to transmit a measurement report for the second measurement triggering event upon determining that the measurement report restriction procedure is active for the event type.
32. A network node (120) comprising a receiving module (750) and a transmitting module (756);
the transmitting module is operable to: transmitting a measurement report restriction procedure configuration to the wireless device (110); and
the receiving module is operable to: receiving a measurement report from the wireless device, the measurement report including an indication of a number of times the wireless device did not transmit a measurement report for the triggered event type.
Technical Field
Background
The present disclosure is described in the context of the third generation partnership project (3GPP) Long Term Evolution (LTE), i.e., enhanced universal terrestrial radio access network (E-UTRAN). However, the problems and solutions described herein are equally applicable to radio access networks and User Equipment (UE) implementing other access technologies and standards. LTE is used as an example technology to which this solution is applicable. Therefore, the use of LTE in the description is particularly useful for understanding problems and solutions.
The 3GPP specifications include serving aerial vehicles using LTE network deployments with base station antennas for terrestrial coverage. Certain specifications relate to interference caused by drones (i.e., Unmanned Aerial Vehicles (UAVs)) using LTE networks and performing handovers between cells in the networks. The goal of a particular LTE specification is to provide connectivity and location services for drones.
An airborne UE may experience radio propagation characteristics that are different from the radio propagation characteristics experienced by the UE when on or near the ground. When the aircraft is flying at a low altitude relative to the base station antenna altitude, the aircraft behaves similar to a conventional UE. However, when the aircraft is flying far above the base station antenna altitude, the uplink signals from the aircraft become more visible to multiple cells due to line-of-sight propagation conditions.
Uplink signals from the aircraft may increase interference in neighboring cells. The increased interference adversely affects conventional UEs (e.g., smartphones, internet of things (IoT) devices, etc.) on or near the ground. Thus, the network may need to restrict the admission of aircraft into the network to constrain the perceived throughput performance of conventional UEs.
Furthermore, since the base station antenna may be tilted downward, the UE may be served by the main lobe of the antenna when the UE is on the ground or below the base station height. However, when a drone is flying above the antenna boresight (boresight), the drone may be served by the side lobes of the antenna. An example is shown in fig. 1.
FIG. 1 is a schematic diagram illustrating an unmanned aerial vehicle flying above the elevation of a base station antenna. The UAV10 is served by a
One way that the network uses to determine link strength, and thus interference strength, is a reference signal received power/quality (RSRP/Q) measurement or a reference signal-to-interference-and-noise ratio (RS-SINR) measurement. RSRP measures the downlink signal. Frequency Division Duplex (FDD) systems may not be considered fully reciprocal. However, the link quality in the uplink and downlink are not completely independent. The RSRP value may also provide a rough idea about the link quality of the uplink. Furthermore, RSRP measurements are also used for drone mobility.
One aspect of measurement configuration is measurement reporting configuration, which can be found in section 5.5.1 of 3GPP TS 36.331. The configuration may include a list of reporting configurations, where each reporting configuration consists of the following.
The reporting criteria are criteria that trigger the UE to send a measurement report. This may be periodic or a single event description.
The reporting format includes the amount the UE includes in the measurement report and associated information (e.g., the number of cells to report).
A single event trigger may be a one shot or "event triggered periodic" based on the event trigger satisfied such that the measurement will be sent periodically after the event is triggered. Both conventional periodic measurements and event-triggered periodic measurements are controlled with a report interval (report interval) and a report amount (report _ amount), which is described in TS36.331 as follows:
reportammount (reported volume): the number of measurement reports applicable to triggerType "event" and to triggerType "periodic". If the purpose is set to reportCGI or reportstrongcellsforsson, only the value 1 applies.
ReportInterval (report interval): indicating the interval between periodic reports. If the UE performs periodic reporting (i.e., when reportammount exceeds 1), ReportInterval is applicable to triggerType "event" and to triggerType "periodic". The value ms120 corresponds to 120 milliseconds, the value ms240 corresponds to 240 milliseconds, and so on; while the value min1 corresponds to 1 minute, min6 corresponds to 6 minutes, and so on.
Measurement reporting is described in section 5.5.5 of 3GPP TS 36.331. For "event triggered" and "event triggered periodic," the process is described in section 5.5.4:
if triggerType is set to event and if after layer 3(layer 3) filtering occurring within the VarMeasConfig for an event (i.e., an event corresponding to the eventId of the corresponding reportConfig within the VarMeasConfig) defined timeToTrigger, one or more applicable cells not included in cellstartreportlist satisfy the entry condition applicable to the event for all measurements (subsequent cells trigger the event), numberofreportsentense defined within the VarMeasReportList is set to 0 and the considered cell is included in cellstartreportlist defined within the VarMeasReportList for that measId. If the UE supports T312 and if a useT312 for the event is included and T310 is running, if T312 is not running, a timer T312 is started with a value configured in the corresponding measObject. The measurement reporting procedure is then started as specified in section 5.5.5.
The following events are defined for E-UTRA and inter-RAT (inter-RAT) in LTE. The Information Element (IE) ReportConfigEUTRA specifies the criteria used to trigger the E-UTRA measurement reporting event. The E-UTRA measurement reporting event related to cell specific reference signals (CRS) is marked AN, where N equals 1, 2, and so on.
Event A1: the service becomes better than the absolute threshold;
event A2: the service becomes worse than the absolute threshold;
event A3: the adjacent cell becomes better than the PCell/PSCell by a certain offset;
event A4: the neighbor cell becomes better than the absolute threshold;
event A5: the PCell/PSCell becomes worse than an absolute threshold of 1, while the neighboring cells become better than another absolute threshold of 2.
Event A6: the neighboring cell becomes better than the SCell by some offset.
The E-UTRA measurement reporting event for CSI-RS is labeled CN, where N equals 1 and 2.
Event C1: the CSI-RS resource becomes better than the absolute threshold;
event C2: the CSI-RS resource becomes better than the reference CSI-RS resource by a certain offset;
event V1: CBR becomes greater than the absolute threshold;
event V2: the CBR becomes less than the absolute threshold.
The IE reportconfiginter RAT specifies the criteria for triggering the inter-RAT measurement reporting event. The inter-RAT measurement reporting events for UTRAN, GERAN, and CDMA2000 are labeled BN, where N equals 1, 2, and so on. The inter-RAT measurement reporting event for WLAN is labeled WN, where N equals 1, 2, and so on.
Event B1: the neighbor cell becomes better than the absolute threshold;
event B2: the PCell becomes worse than an absolute threshold of 1 and the neighboring cell becomes better than another absolute threshold of 2.
Event W1: the WLAN becomes better than the threshold;
event W2: all WLANs within the WLAN mobility set become worse than threshold1, while WLANs outside the WLAN mobility set become better than threshold 2;
event W3: all WLANs in the WLAN mobility set become worse than threshold.
The b1 and b2 event thresholds for CDMA2000 are CDMA2000 pilot detection thresholds and are represented as equal to an unsigned binary number [ -2x10log10Ec/Io ] in units of 0.5 dB.
When the UE is configured with event-triggered measurements (e.g., event a1) and a certain cell becomes 3dB better than the serving cell, the UE triggers a measurement report. numberofreportsents is a counter that points to the report volume and is set to 0 whenever a new cell/reference signal configures a trigger event. Thus, the reporting volume only controls the amount of periodic reporting for event periodic reporting. The cellsTriggeredList controls the same cell not to trigger the process multiple times.
However, for drones, multiple cell/reference signal configurations may continuously satisfy the entry condition. An event may be triggered multiple times in a short time, thereby initiating multiple measurements.
The same problem may also occur for one cell transmitting multiple beams and UEs configured to measure the NR of the beam quality based on NR reference signals like SS blocks or channel state information reference signals (CSI-RS).
Disclosure of Invention
Embodiments described herein include a timer that prevents the same event from being triggered continuously. This timer may be referred to as a "prohibit timer". According to some embodiments, the counter enables sending measurement reports triggered by the same event every second, third, fourth, etc. time the same event is triggered.
According to some embodiments, a method of limiting transmission of measurement reports in a wireless device comprises: a first measurement trigger event for an event type is received. The first measurement trigger event is associated with a first wireless signal. The method further comprises the following steps: transmitting a measurement report for a first measurement trigger event; initiating a measurement report restriction procedure for the event type; and receiving a second measurement trigger event for the event type. The second measurement trigger event is associated with a second wireless signal different from the first wireless signal. The method further comprises the following steps: determining that a measurement report restriction procedure is active for the event type and determining not to transmit a measurement report for a second measurement triggering event. The wireless device may include an Unmanned Aerial Vehicle (UAV).
In a particular embodiment, initiating a measurement report restriction procedure for the event type includes initiating a timer. Determining whether the measurement report restriction procedure is active for the event type may include: it is determined whether the timer has expired.
In a particular embodiment, initiating a measurement report restriction procedure for the event type includes resetting a counter. Determining whether a measurement report restriction procedure is active for the event type may include: it is determined whether the counter is below a threshold. Upon determining that a measurement report restriction procedure is active for the event type, the method may further include incrementing a counter.
In a particular embodiment, the method further comprises: transmitting a measurement report for a second measurement triggering event upon determining that a measurement report restriction procedure is not active for the event type. The method may also include receiving a measurement report restriction procedure configuration. The measurement report restriction procedure configuration may include at least one of a timer value or a counter threshold value.
In a particular embodiment, the first wireless signal originates from a first cell and the second wireless signal originates from a second cell different from the first cell. In some embodiments, the first wireless signal may comprise a first beamformed wireless signal and the second wireless signal may comprise a second beamformed wireless signal.
According to some embodiments, a wireless device includes a processing circuit operable to receive a first measurement trigger event for an event type. The first measurement trigger event is associated with a first wireless signal. The processing circuit is further operable to: transmitting a measurement report for a first measurement trigger event; initiating a measurement report restriction procedure for the event type; and receiving a second measurement trigger event for the event type. The second measurement trigger event is associated with a second wireless signal different from the first wireless signal. The processing circuit is further operable to: determining whether a measurement report restriction procedure is active for an event type, and upon determining that the measurement report restriction procedure is active for the event type, determining not to transmit a measurement report for a second measurement triggering event. The wireless device may include an unmanned aerial vehicle.
In a particular embodiment, the processing circuit is operable to initiate a measurement report restriction procedure for the event type by starting a timer. The processing circuitry is operable to determine whether a measurement report restriction procedure is active for the event type by determining whether a timer has expired.
In a particular embodiment, the processing circuit is operable to initiate a measurement report restriction procedure for the event type by resetting a counter. The processing circuitry is operable to determine whether a measurement report restriction procedure is active for the event type by determining whether a counter is below a threshold, and to increment the counter upon determining that the measurement report restriction procedure is active for the event type.
In a particular embodiment, the processing circuit is further operable to transmit the measurement report for a second measurement triggering event when it is determined that the measurement report restriction procedure is not active for the event type. The processing circuitry may be further operable to receive a measurement report restriction procedure configuration. The measurement report restriction procedure configuration may include at least one of a timer value or a counter threshold value.
In a particular embodiment, the first wireless signal originates from a first cell and the second wireless signal originates from a second cell different from the first cell. In some embodiments, the first wireless signal comprises a first beamformed wireless signal and the second wireless signal comprises a second beamformed wireless signal.
According to some embodiments, a method of restricting transmission of measurement reports in a network node comprises: the method includes transmitting a measurement report restriction procedure configuration to the wireless device and receiving a measurement report from the wireless device. The measurement report includes an indication of a number of times the wireless device has not transmitted a measurement report for the type of event triggered. The measurement report restriction procedure configuration may include at least one of a timer value or a counter threshold value.
In a particular embodiment, the wireless device includes an unmanned aerial vehicle. The method may further comprise: determining whether the UAV is airborne based on the received indication of the number of times measurement reports have not been transmitted for the triggered event type.
According to some embodiments, a network node comprises processing circuitry operable to transmit a measurement report restriction process configuration to a wireless device and to receive a measurement report from the wireless device. The measurement report includes an indication of a number of times the wireless device has not transmitted a measurement report for the type of event triggered. The measurement report restriction procedure configuration may include at least one of a timer value or a counter threshold value.
In a particular embodiment, the wireless device includes an unmanned aerial vehicle. The processing circuit may be further operable to determine whether the UAV is airborne based on the received indication of the number of times measurement reports have not been transmitted for the triggered event type.
According to some embodiments, a wireless device includes a receiving module, a determining module, and a transmitting module. The receiving module is operable to receive a first measurement trigger event for an event type. The first measurement trigger event is associated with the first wireless signal. The transmitting module is operable to transmit a measurement report for a first measurement triggering event. The determination module is operable to initiate a measurement report restriction procedure for the event type. The receiving module is further operable to receive a second measurement trigger event for the event type. The second measurement trigger event is associated with a second wireless signal different from the first wireless signal. The determination module is further operable to determine whether a measurement report restriction procedure is active for the event type, and determine not to transmit a measurement report for a second measurement triggering event when it is determined that the measurement report restriction procedure is active for the event type.
According to some embodiments, a network node comprises a receiving module and a transmitting module. The transmitting module is operable to transmit the measurement report restriction process configuration to the wireless device. The receiving module is operable to receive a measurement report from a wireless device. The measurement report includes an indication of a number of times the wireless device has not transmitted a measurement report for the type of event triggered.
A computer program product is also disclosed. The computer program product includes instructions stored on a non-transitory computer readable medium that when executed by a processor perform the steps of: receiving a first measurement trigger event for an event type; transmitting a measurement report for a first measurement trigger event; initiating a measurement report restriction procedure for the event type; receiving a second measurement trigger event for the event type; determining that a measurement report restriction procedure is active for the event type; and determining not to transmit a measurement report for the second measurement triggering event.
Another computer program product includes instructions stored on a non-transitory computer readable medium that when executed by a processor perform the steps of: transmitting a measurement report restriction process configuration to the wireless device; and receiving a measurement report from the wireless device.
Certain embodiments of the present disclosure may provide one or more technical advantages. For example, if the measurement object is a frequency, then disabling a timer or counter may prevent triggering the same or nearly the same measurement report in certain situations that may trigger the same event continuously, according to some embodiments. At the same time, this allows timely reporting at the first trigger event. Other advantages may be readily obtained by those skilled in the art. Certain embodiments may have none, some, or all of the described advantages.
Drawings
For a more complete understanding of the embodiments and features and advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram showing an unmanned aerial vehicle flying above the elevation of a base station antenna;
fig. 2 is a block diagram of an example wireless network, in accordance with some embodiments;
fig. 3 is a flow diagram of an example method in a wireless device according to some embodiments;
fig. 4 is a flow diagram illustrating an example method in a network node according to some embodiments;
FIG. 5A is a block diagram illustrating an example embodiment of a wireless device;
FIG. 5B is a block diagram illustrating example components of a wireless device;
fig. 6A is a block diagram illustrating an example embodiment of a network node; and
fig. 6B is a block diagram illustrating example components of a network node.
Particular embodiments relate to wireless communications, and more particularly to inhibiting measurement reporting based on recent measurement reports.
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