WO2025086191A1

WO2025086191A1 - Method and apparatus for measurement adaption

Info

Publication number: WO2025086191A1
Application number: PCT/CN2023/126722
Authority: WO
Inventors: Jianqiang DAI; Mengzhu CHEN; Bo Dai; Jiajun Xu; Jun Xu
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2023-10-26
Filing date: 2023-10-26
Publication date: 2025-05-01
Anticipated expiration: 2026-04-26

Abstract

Systems, methods, and apparatus for wireless communication are described. A wireless communication method includes receiving, by a wireless device, a configuration of a measurement gap. The method further includes relaxing, by the wireless device and based on the configuration of the measurement gap, a radio resource management (RRM) measurement. The method further includes performing, by the wireless device, a transmission or a reception of a data burst during the measurement gap.

Description

METHOD AND APPARATUS FOR MEASUREMENT ADAPTION

TECHNICAL FIELD

This patent document is directed generally to wireless communications.

BACKGROUND

Mobile telecommunication technologies are moving the world toward an increasingly connected and networked society. In comparison with the existing wireless networks, next-generation systems and wireless communication techniques will need to support a much wider range of use-case characteristics and provide a more complex and sophisticated range of access requirements and flexibilities.

Long-Term Evolution (LTE) is a standard for wireless communication for mobile devices and data terminals developed by 3rd Generation Partnership Project (3GPP) . LTE Advanced (LTE-A) is a wireless communication standard that enhances the LTE standard. The 5th generation of wireless system, known as 5G, advances the LTE and LTE-Awireless standards and is committed to supporting higher data rates, large number of connections, ultra-low latency, high reliability, and other emerging business needs.

SUMMARY

Techniques are disclosed for adapting radio resource management (RRM) measurements based on indications of dynamic signaling and/or higher layer parameter measurements. Techniques are based on measurement gap configurations or conflicts between measurement gaps and connected mode discontinuous reception (CDRX) active time. A wireless device can relax RRM measurements based on the indications, dynamically adapt user equipment (UE) behaviors, and transmit and receive data in measurement gaps when RRM measurements are relaxed or skipped. This can increase data rate, network capacity, and resource usage efficiency.

A first example wireless communication method includes receiving, by a wireless device, a configuration of a measurement gap. The method further includes relaxing, by the wireless device and based on the configuration of the measurement gap, a radio resource management (RRM) measurement. The method further includes performing, by the wireless device, a transmission or a reception of a data burst during the measurement gap.

A second example wireless communication method includes receiving, by a wireless device, an indication indicating a time duration during which radio resource management (RRM) measurements can be skipped. The method further includes skipping, by the wireless device and based on the indication, RRM measurements during the time duration. The method further includes performing, by the wireless device, a transmission or a reception of a data burst during a time period when RRM measurements are skipped.

A third example wireless communication method includes detecting, by a wireless device, a conflict between a measurement gap and a connected mode discontinuous reception (CDRX) active time. The method further includes skipping, by the wireless device, radio resource management (RRM) measurements during a time duration of the conflict. The method further includes performing, by the wireless device, a transmission or a reception of a data burst during a time period when RRM measurements are skipped.

A fourth example wireless communication method includes transmitting, by a network node, a configuration of a measurement gap, where a radio resource management (RRM) measurement is relaxed based on the configuration of the measurement gap. The method further includes performing, by the network node, a transmission or a reception of a data burst during the measurement gap.

A fifth example wireless communication method includes transmitting, by a network node, an indication indicating a time duration during which radio resource management (RRM) measurements can be skipped. The method further includes performing, by the network node and based on the indication, a transmission or a reception of a data burst during a time period when RRM measurements are skipped.

A sixth example wireless communication method includes detecting, by a network node, a conflict between a measurement gap and a connected mode discontinuous reception (CDRX) active time. The method further includes performing, by the network node, a transmission or a reception of a data burst during a time period of the conflict when radio resource management (RRM) measurements are skipped.

In yet another exemplary embodiment, a device that is configured or operable to perform the above-described methods is disclosed. The device may include a processor configured to implement the above-described methods.

In yet another exemplary embodiment, the above-described methods are embodied in the form of processor-executable code and stored in a non-transitory computer-readable storage medium. The code included in the computer readable storage medium when executed by a processor, causes the processor to implement the methods described in this patent document.

The above and other aspects and their implementations are described in greater detail in the drawings, the descriptions, and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exemplary flowchart for relaxing a radio resource management (RRM) measurement based on a configuration.

FIG. 2 is an exemplary flowchart for relaxing a RRM measurement based on an indication.

FIG. 3 is an exemplary flowchart for relaxing a RRM measurement based on a conflict.

FIG. 4 is an exemplary flowchart for receiving a relaxed RRM measurement based on a configuration.

FIG. 5 is an exemplary flowchart for receiving a relaxed RRM measurement based on an indication.

FIG. 6 is an exemplary flowchart for receiving a relaxed RRM measurement based on a conflict.

FIG. 7 illustrates an exemplary block diagram of a hardware platform that may be a part of a network node or a wireless device.

FIG. 8 illustrates exemplary wireless communication including a Base Station (BS) and User Equipment (UE) based on some implementations of the disclosed technology.

DETAILED DESCRIPTION

The example headings for the various sections below are used to facilitate the understanding of the disclosed subject matter and do not limit the scope of the claimed subject matter in any way. Accordingly, one or more features of one example section can be combined with one or more features of another example section. Furthermore, 5G terminology is used for the sake of clarity of explanation, but the techniques disclosed in the present document are not limited to 5G technology only and may be used in wireless systems that implemented other protocols.

I. Introduction

eXtended Reality (XR) , such as augmented reality (AR) /virtual reality (VR) , techniques arise in multiple use cases, e.g., immersive gaming, Smart Transport, collaborative and concurrent engineering, etc. From the wireless connection perspective, these cases are supposed to be supported based on enhanced new radio (NR) wireless network, which requires properties of improved capacity with both high data rate and low network latency.

In a measurement gap (e.g., 6 ms in every 20 ms) , user equipment (UE) switches radio frequency to receive, e.g., Synchronization Signal Block (SSB) of inter frequency for radio resource management (RRM) measurement, hence UE basically does not work on the previous serving cell, and UE is not expected to transmit/receive data at the serving cell during the measurement gap. So it is possible to improve capacity if the measurement gap is enhanced, for example, for UE to utilize the radio resource of the measurement gap for data transmission/reception.

With respect to Frequency Range 1 (FR1) and Frequency Range 1 (FR2) inter-frequency RRM measurements with measurement gaps,

If we can enhance the configuration of the measurement gap (MG) compared to legacy configuration of periodic MG via radio resource control (RRC) signaling, and relax RRM measurement (in this embodiment UE is not expected to perform RRM measurement within all configured Measurement gaps) , UE can utilize the measurement gap to improve capacity for specific XR traffic.

For example, dynamic adaptation of MG is introduced on top of semi-static MG configuration. It allows UE to perform data transmission/reception based on indication rather than only performing measurement during a measurement gap.

One of the benefits is:

Capacity is enhanced by utilizing radio resource that is configured for measurement. Meanwhile, various solutions are applied according to different requirements of RRM.

II. Embodiment A

A higher layer parameter enables UE behavior during measurement gap, and the behavior is corresponding to a UE feature.

Embodiment A-1

A higher layer parameter is configured to enable relaxed measurement.

If a first higher layer parameter is configured/applicable, the UE may choose to perform relaxed measurements/or choose to not perform measurement, for intra-frequency cells, NR inter-frequency cells. In this embodiment, if a higher layer signaling is configured, UE is able to relax RRM measurement based on the indication of the higher layer signaling.

In another embodiment, if a time duration T1 is configured, and also if a first higher layer parameter is applicable, the UE may receive/transmit data at MG during T1.

When T1 expires, UE is not allowed to receive/transmit data during MG.

Embodiment A-2

A higher layer parameter + Downlink Control Information (DCI) indication.

For unpaired spectrum operation for a UE on a cell in a frequency band of FR1/FR2, and If a first higher layer parameter is configured/applicable, (e.g., it can indicate when the scheduling restrictions due to RRM measurements are not applicable) , and if the UE detects a DCI format indicating to the UE to transmit/receive in a set of slots/symbols, for example, the slots are indicated by a DCI, it can be the first 2 milliseconds of a MG, when the sub-carrier spacing is 15kHz, or it can be multiple slots in terms of a specific sub-carrier spacing. In another embodiment, it can be specific symbols in a slot other than SSB/CSI-RS symbols. The UE is not required to perform RRM measurements based on a Synchronization Signal (SS) /Physical Broadcast Channel (PBCH) block or Channel State Information Reference Signal (CSI-RS) reception on a different cell in the frequency band.

III. Embodiment B

UE behavior based on indication of dynamic signaling.

Embodiment B-1

If a new indication is introduced for MG, e.g., applying N bits, to indicate a time duration during which RRM measurements can be skipped, and UE receives the new indication at slot n,

UE may skip the measurement in the MG, or

UE may skip the measurement in the MG for a duration provided by one value in the set of durations that is configured by a higher layer parameter.

For example, 1 bit is used for the measurement adaption field as follows:

Value ‘0’ indicates no skipping of MG.

Value ‘1’ indicates skipping MG for a time duration provided by the first value in the set of durations that is configured by a higher layer parameter.

If a new indication is introduced for MG, e.g., applying N bits, to indicate to switch among MG configurations, and UE receives the new indication at slot n,

UE may start a measurement according to one MG configuration, and stop the measurement according to another MG configuration. Assume two MG configurations are configured via RRC, and the MG in the second configuration is sparser (e.g., has a larger periodicity) than the MG in the first configuration.

For example, 1 bit is used for the measurement adaption field.

Value ‘0’ indicates that the start of the measurement gap is set according to the first MG configuration, and the measurement gap stops according to other MG configurations, if any. For example, when the dynamic signaling involves multiple MG configurations, if the measurement adaptation field has a value “0, ” the measurement gap starts according to the first MG configuration among the multiple MG configurations. Then, the measurement gap does not start according to other MG configurations.

Value ‘1’ indicates that the start of the measurement gap is set according to the second MG configuration, and the measurement gap stops according to other MG configurations, if any.

If a new indication is introduced for MG, e.g., applying N bits, to indicate to switch among MG configurations and MG skipping, and UE receives the new indication at slot n,

UE may start a measurement according to one MG configuration, and stop the measurement according to another MG configuration.

UE may skip MG for a duration provided by one value in the set of durations that is configured by a higher layer parameter.

If a new indication is introduced for MG, e.g., applying N bits, each bit indicating whether or not to skip measurement for one or multiple corresponding subframes, and UE receives the new indication at slot n,

UE conducts a measurement for one or multiple corresponding subframes indicated as ” 1” ,

UE is not required to conduct a measurement for one or multiple corresponding subframes indicated as “0” , vice versus.

If a new indication is introduced for MG, e.g., applying N bits, to indicate a time duration during which MG can be prioritized to transmit UL or receive DL, (N bits) , and UE receives the new indication at slot n,

UE may prioritize to transmit UL or receive DL during the time duration of MG. For example, one bit indicating a corresponding slot is “1” , which means UE transmits UL channel or receives DL channel if there is a need for scheduling the resource, and UE does not perform RRM measurement in that slot. On the other hand, if there’s no need for scheduling the resource, UE performs RRM measurement as legacy behavior. Moreover, each bit indicates one or more slots within a MG.

In another embodiment, the above “1” can be replaced as “0” , and UE prioritizes transmitting UL channel or receiving DL channel based on the indication.

Embodiment B-2

Another embodiment is based on reception of medium access control (MAC) control element (CE) indication.

If a new indication is introduced for MG, e.g., a MAC CE, indicating a time duration during which RRM measurements can be skipped, and UE receives the new indication at slot n.

UE may skip measurements in a MG, or skip measurements in half of a MG, or skip measurements in a part of a MG, which may overlap with UL/DL transmission.

In another embodiment, UE may prioritize to transmit UL or receive DL during a duration that is configured by a higher layer parameter.

IV. Embodiment C

UE behavior based on Connected Mode Discontinuous Reception (CDRX) configuration.

In this embodiment, there may be no explicit indication for measurement adaption.

Embodiment C-1

Once conflict occurs among measurement gap and CDRX onDuration, re-transmissionTimer, UE skips measurement in this period of MG. A UE can identify the conflict between these configurations in the time domain.

In another embodiment, UE terminates RRM measurement at the start of CDRX onDuration.

In another embodiment, UE does not expect to monitor physical downlink control channel (PDCCH) when the UE performs RRM measurements, e.g., at inactive time.

In another embodiment, UE does not perform measurement and monitoring PDCCH at same time.

In an embodiment, the measurement adaption is applicable, when this feature (relax RRM measurement at measurement gap) is enabled, and a specific search space ID is configured.

UE monitors a PDCCH in a specific search that is corresponding to a search space identifier (ID) , and the PDCCH schedules a physical downlink shared channel (PDSCH) for transmitting/receiving XR data.

In an embodiment, measurement adaption is applicable, when this feature (relax RRM measurement at measurement gap) is enabled, and when physical downlink shared channel (PDSCH) scheduled by PDCCH is monitored in a specific search space ID.

In an embodiment, measurement adaption is applicable, when this feature (relax RRM measurement at measurement gap) is enabled, and when specific Semi Persistent Scheduling (SPS) PDSCH is scheduled.

In one embodiment, measurement adaption includes that UE does not perform measurement, for intra-frequency cells, or NR inter-frequency cells in MG.

In another embodiment, measurement adaption includes that UE prioritizes transmitting UL channel or receiving DL channel over UE measurement, for intra-frequency cells, or NR inter-frequency cells in MG.

Embodiment C-2

MG occurs/starts when a timer expires. The timer starts/initiates when UE receives each PDCCH. In another embodiment, the timer can be InactivityTimer, or a timer T2.

For example, if UE has no DL/UL data reception/transmission during a time duration/when Timer T2 runs, MG occurs after a time shift with the MG configured by a Radio Resource Control (RRC) configuration. In some embodiments, a MG occurs/starts at the time when T2 expires.

V. Embodiment D

Embodiment D-1

Applicable time range of an indication.

The dynamic indication in embodiment B is applicable to a time range after the indication. For instance, the time range can be a time duration T3 after the slot transmitting indication.

Within the time duration, the indication is valid. For example, within the T3, UE can be indicated to skip the RRM measurements if MG collide with DL/UL transmission/reception.

In another embodiment, a timer starts when UE receives the indication to adapt MG, UE can skip the RRM measurements before the timer expires if MG collide with DL/UL transmission/reception.

In another embodiment, T3 can be a number of MG periods.

In another embodiment, each MG within a period is adapted.

In another embodiment, one or more MGs are adapted according to DCI indication, and the remaining MGs do not change.

In an embodiment, a MG in every specific period is changed, when this feature is enabled. For example, the specific period is configured via higher layer signaling. In one embodiment, a specific period is a XR traffic period. In another embodiment, it can be multiple XR traffic periods, and it is an integer, e.g., 50 milliseconds.

Embodiment D-2

Applicable cell range of an indication.

The dynamic indication in embodiment B is applicable to a set of serving cells, or all serving cell, or all FR1 serving cells, or all FR2 serving cells, if a UE has multiple serving cells.

For example, if UE is configured gap_type3, the UE measurement gap configuration is indicated by a RRC signaling.

If UE receives a dynamic indication of adaption of MG, UE is able to conduct reception/transmission from/to all serving cells based on the indication, e.g., skipping MG /or skipping interrupt time of measurement for all serving cells.

In another embodiment, if UE receives a dynamic indication of adaption of MG, and UE receives indication of applicable serving cells for measurement adaption, UE is able to conduct reception/transmission from/to a set of serving cells based on the indication. For instance, UE skips MG or ignores interrupt time of measurement for a set of serving cells.

VI. Embodiment E

UE assistance information.

UE reports necessary assistance information to gNB.

In an embodiment, UE reports a UL MAC CE that indicates whether or not the UE relaxes RRM measurements, or whether or not the UE can dynamically adapt RRM measurements. For example, the indication is 1 bit in a MAC CE.

The assistance information can be UE movement information, e.g., velocity.

The assistance information may include in-sync indication, which inform gNB whether or not DL synchronization is maintained. For example, the UE applies the first threshold to the L1-Reference Signal Received Power (RSRP) measurement to determine in sync (it means gNB and UE are in DL synchronization) or out sync (it means gNB and UE are not in DL synchronization) .

In another embodiment, UE can feedback RRM relaxation request.

In an embodiment, UE assistance information is a special RRC message. For example, the information element (IE) is as follows:

UEAssistanceInformation-IEs : : = SEQUENCE {MG-Preference MG-Preference-r19 OPTIONAL, }

Where ‘MG-Preference-r19’ contains UE’s preference on reporting measurement result or data transferring, or contains relaxation state of measurement.

In another embodiment, UE capability information includes that UE can relax RRM measurements, or UE can dynamically adapt RRM measurements, if gNB requests UE to report the capability.

VII. Other Embodiments

In one embodiment, UE determines whether or not to perform relaxed measurements.

In this embodiment, UE may receive both higher layer parameter and dynamic indication, however, UE can determine to choose to perform relaxed measurements/or not relax measurement, for intra-frequency cells, NR inter-frequency cells, based on the second threshold to the L1-RSRP measurement. UE considers the indication of measurement adaption from network as a recommendation, but it is not mandatory for UE to relax RRM measurement. Therefore, UE behavior may not follow the indication of network.

In another embodiment, the criteria of determining whether or not to perform relaxed measurements, e.g., determining whether or not a channel/signal has higher priority over RRM measurement, can be CSI measurement result.

In another embodiment, UE can determine to choose to perform relaxed measurements or not relax measurement for intra-frequency cells, NR inter-frequency cells, based on a threshold that determines Radio Link Failure (RLF) , beam failure, a threshold of triggering measurement report.

In one embodiment, delay for switching between data transmission and RRM measurement is a second time gap, e.g., 0.5ms.

During the measurement gap, if UE is allowed to transmit or receive, UE may need a second time gap, when switch from transmission/reception to measurement, or switch from measurement to transmission/reception.

In one embodiment, delay of dynamic signaling is activated.

UE may need a third time gap, (e.g., not less than 0.5ms) from the time instant of receiving dynamic indication, to switch to transmission/reception at a serving cell, or switch to inter-frequency RF to conduct measurement.

In another embodiment, in the meanwhile, a Hybrid Automatic Repeat request (HARQ) -Acknowledgement (ACK) is reported for the MAC CE indication to gNB. And the indication is activated 3ms after the report of HARQ-ACK.

In one embodiment, during MG that relaxed RRM measurement, reception of SSB is not impacted.

During the skipping duration (2ms) , the reception of SSB is not impacted.

Given a SSB configuration, the SSB for measurement during MG cannot be skipped. That is, UE receives SSB as legacy behavior.

In one embodiment, the solutions are applicable to cases of FR2 intra-frequency measurements w/o measurement gaps.

In this patent document, measurement gap can be SS/PBCH Block Measurement Timing Configuration (SMTC) , or other gap for DL measurement.

FIG. 1 is an exemplary flowchart for relaxing a radio resource management (RRM) measurement based on a configuration. Operation 102 includes receiving, by a wireless device, a configuration of a measurement gap. Operation 104 includes relaxing, by the wireless device and based on the configuration of the measurement gap, a radio resource management (RRM) measurement. Operation 106 includes performing, by the wireless device, a transmission or a reception of a data burst during the measurement gap. In some embodiments, the method can be implemented according to Embodiment A. In some embodiments, performing further steps of the method can be based on a better system performance than a legacy protocol.

In some embodiments, the configuration of the measurement gap includes a synchronization signal (SS) /physical broadcast channel (PBCH) block measurement timing configuration (SMTC) . In some embodiments, the method further includes receiving, by the wireless device, a higher layer parameter, where relaxing the RRM measurement includes at least one of: performing, by the wireless device and based on the higher layer parameter, a relaxed RRM measurement for an intra-frequency cell or an inter-frequency cell; or not performing the RRM measurement.

In some embodiments, relaxing the RRM measurement is based on at least one of: a threshold to a L1 reference signal received power (L1-RSRP) measurement, a threshold that determines a radio link failure (RLF) , a threshold that determines a beam failure, or a measurement report. In some embodiments, a time gap exists between the RRM measurement and the transmission or the reception of the data burst.

In some embodiments, the wireless device operates on a cell in a frequency band, and the method further includes receiving, by the wireless device, a higher layer parameter indicating when a scheduling restriction due to RRM measurements is not applicable. The method further includes receiving, by the wireless device, downlink control information (DCI) indicating to the wireless device to transmit or receive in a set of slots or symbols, where relaxing the RRM measurement includes that the wireless device is not required to perform the RRM measurement based on a reception of a synchronization signal (SS) /physical broadcast channel (PBCH) block or a channel state information reference signal (CSI-RS) on a different cell in the frequency band.

FIG. 2 is an exemplary flowchart for relaxing a radio resource management (RRM) measurement based on an indication. Operation 202 includes receiving, by a wireless device, an indication indicating a time duration during which radio resource management (RRM) measurements can be skipped. Operation 204 includes skipping, by the wireless device and based on the indication, RRM measurements during the time duration. Operation 206 includes performing, by the wireless device, a transmission or a reception of a data burst during a time period when RRM measurements are skipped. In some embodiments, the method can be implemented according to Embodiment B. In some embodiments, performing further steps of the method can be based on a better system performance than a legacy protocol.

In some embodiments, a time gap exists between receiving the indication and performing the transmission or the reception of the data burst. In some embodiments, the method further includes receiving, by the wireless device, a synchronization signal block (SSB) configuration, where SSB receptions are not skipped during the time duration.

In some embodiments, the indication further indicates the wireless device to switch between a first measurement gap configuration and a second measurement gap configuration, and the method further includes starting, by the wireless device, a RRM measurement according to the first measurement gap configuration. The method further includes stopping, by the wireless device, the RRM measurement according to the second measurement gap configuration. In some embodiments, the second measurement gap configuration is a sparser measurement gap configuration than the first measurement gap configuration.

In some embodiments, the indication includes a number of bits, and the method further includes skipping, by the wireless device, RRM measurements for one or more subframes corresponding to a bit indicated as 0. The method further includes not skipping, by the wireless device, RRM measurements for one or more subframes corresponding to a bit indicated as 1.

In some embodiments, the indication includes a number of bits, and the method further includes skipping, by the wireless device, RRM measurements for one or more subframes corresponding to a bit indicated as 1. The method further includes not skipping, by the wireless device, RRM measurements for one or more subframes corresponding to a bit indicated as 0.

In some embodiments, the method further includes transmitting or receiving, by the wireless device and as indicated by the indication, a data burst during a time period when measurement gaps are prioritized to transmit or receive data bursts.

In some embodiments, the indication includes a medium access control (MAC) control element (CE) , where skipping RRM measurements during the time duration includes skipping RRM measurements in one or more measurement gaps, in half of a measurement gap, or in a part of a measurement gap.

In some embodiments, the indication is invalid after a timer expires, and the method further includes skipping, by the wireless device, RRM measurements if a measurement gap configuration collides with a downlink or an uplink transmission or reception. In some embodiments, the indication is applicable to a set of serving cells of the wireless device, a set of frequency range 1 (FR1) serving cells of the wireless device, or a set of FR2 serving cells of the wireless device. In some embodiments, the set of serving cells is indicated by downlink control information (DCI) .

FIG. 3 is an exemplary flowchart for relaxing a radio resource management (RRM) measurement based on a conflict. Operation 302 includes detecting, by a wireless device, a conflict between a measurement gap and a connected mode discontinuous reception (CDRX) active time. Operation 304 includes skipping, by the wireless device, radio resource management (RRM) measurements during a time duration of the conflict. Operation 306 includes performing, by the wireless device, a transmission or a reception of a data burst during a time period when RRM measurements are skipped. In some embodiments, the method can be implemented according to Embodiment C. In some embodiments, performing further steps of the method can be based on a better system performance than a legacy protocol.

In some embodiments, the wireless device terminates RRM measurements at the start of a CDRX active time. In some embodiments, the wireless device does not perform RRM measurements and monitor a physical downlink control channel (PDCCH) at the same time. In some embodiments, the method further includes monitoring, by the wireless device, a physical downlink control channel (PDCCH) based on a specific search space identifier (ID) for the transmission or the reception of the data burst.

In some embodiments, the method further includes monitoring, by the wireless device, a physical downlink control channel (PDCCH) based on a specific search space identifier (ID) , where the PDCCH schedules a physical downlink shared channel (PDSCH) for receiving extended reality (XR) data. In some embodiments, the method further includes receiving, by the wireless device, a modified measurement gap configuration and receiving, by the wireless device, a specific semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) for receiving extended reality (XR) data.

In some embodiments, the method further includes receiving, by the wireless device, an indication to adapt a measurement gap configuration. The method further includes starting, by the wireless device and at the start or end of receiving the indication, a timer, where skipping RRM measurements during the time duration of the conflict includes skipping RRM measurements before the timer expires.

In some embodiments, the timer is a number of measurement gap periods, and at least one of the following applies: each measurement gap within the number of measurement gap periods is adapted; each measurement gap within a subset of the number of measurement gap periods is adapted; or one or more measurement gaps are adapted according to the indication.

In some embodiments, the method further includes receiving, by the wireless device, a physical downlink control channel (PDCCH) . The method further includes starting, by the wireless device and at the start or end of receiving the PDCCH, a timer. The method further includes initiating, by the wireless device, a measurement gap after the timer expires.

In some embodiments, the wireless device performs no downlink or uplink transmissions during a time duration of the timer, and initiating the measurement gap after the timer expires includes initiating the measurement gap after a time shift configured by a radio resource control (RRC) configuration.

In some embodiments, the method further includes reporting, by the wireless device, assistance information, where the assistance information includes movement information of the wireless device or information on whether downlink synchronization is maintained. The method further includes providing, by the wireless device, RRM measurement relaxation feedback.

FIG. 4 is an exemplary flowchart for receiving a relaxed radio resource management (RRM) measurement based on a configuration. Operation 402 includes transmitting, by a network node, a configuration of a measurement gap, where a radio resource management (RRM) measurement is relaxed based on the configuration of the measurement gap. Operation 404 includes performing, by the network node, a transmission or a reception of a data burst during the measurement gap. In some embodiments, the method can be implemented according to Embodiment A. In some embodiments, performing further steps of the method can be based on a better system performance than a legacy protocol.

In some embodiments, a wireless device operates on a cell in a frequency band, and the method further includes transmitting, by the network node, a higher layer parameter indicating when a scheduling restriction due to RRM measurements is not applicable. The method further includes transmitting, by the network node, downlink control information (DCI) indicating to the wireless device to transmit or receive in a set of slots or symbols, where the wireless device is not required to perform RRM measurements based on a reception of a synchronization signal (SS) /physical broadcast channel (PBCH) block or a channel state information reference signal (CSI-RS) on a different cell in the frequency band.

FIG. 5 is an exemplary flowchart for receiving a relaxed radio resource management (RRM) measurement based on an indication. Operation 502 includes transmitting, by a network node, an indication indicating a time duration during which radio resource management (RRM) measurements can be skipped. Operation 504 includes performing, by the network node and based on the indication, a transmission or a reception of a data burst during a time period when RRM measurements are skipped. In some embodiments, the method can be implemented according to Embodiment B. In some embodiments, performing further steps of the method can be based on a better system performance than a legacy protocol.

In some embodiments, the method further includes transmitting, by the network node, a synchronization signal block (SSB) configuration, where SSB receptions are not skipped during the time duration. In some embodiments, the method further includes transmitting or receiving, by the network node and as indicated by the indication, a data burst during a time period when measurement gaps are prioritized to transmit or receive data bursts.

FIG. 6 is an exemplary flowchart for receiving a relaxed radio resource management (RRM) measurement based on a conflict. Operation 602 includes detecting, by a network node, a conflict between a measurement gap and a connected mode discontinuous reception (CDRX) active time. Operation 604 includes performing, by the network node, a transmission or a reception of a data burst during a time period of the conflict when radio resource management (RRM) measurements are skipped. In some embodiments, the method can be implemented according to Embodiment C. In some embodiments, performing further steps of the method can be based on a better system performance than a legacy protocol.

In some embodiments, the method further includes receiving, by the network node, assistance information, where the assistance information includes movement information of a wireless device or information on whether downlink synchronization is maintained. The method further includes receiving, by the network node, RRM measurement relaxation feedback.

FIG. 7 shows an exemplary block diagram of a hardware platform 700 that may be a part of a network node (e.g., base station, transmission parameter, or TRP) or a wireless device (e.g., a user equipment (UE) ) . The hardware platform 700 includes at least one processor 710 and a memory 705 having instructions stored thereupon. The instructions upon execution by the processor 710 configure the hardware platform 700 to perform the operations described in FIGS. 1 to 6 and in the various embodiments described in this patent document. The transmitter 715 transmits or sends information or data to another device. For example, a network node transmitter can send a message to a user equipment. The receiver 720 receives information or data transmitted or sent by another device. For example, a user equipment can receive a message from a network note. For example, a UE, a wireless device, or a network node, as described in the present document, may be implemented using the hardware platform 700.

The implementations as discussed above will apply to a wireless communication. FIG. 8 shows an example of a wireless communication system (e.g., a 5G or NR cellular network) that includes a base station 820 and one or more user equipment (UE) 811, 812, and 813. In some embodiments, the UEs access the BS (e.g., the network, the TRP) using a communication link to the network (sometimes called uplink direction, as depicted by dashed arrows 831, 832, 833) , which then enables subsequent communication (e.g., shown in the direction from the network to the UEs, sometimes called downlink direction, shown by arrows 841, 842, 843) from the BS to the UEs. In some embodiments, the BS send information to the UEs (sometimes called downlink direction, as depicted by arrows 841, 842, 843) , which then enables subsequent communication (e.g., shown in the direction from the UEs to the BS, sometimes called uplink direction, shown by dashed arrows 831, 832, 833) from the UEs to the BS. The UE may be, for example, a smartphone, a tablet, a mobile computer, a machine to machine (M2M) device, an Internet of Things (IoT) device, and so on. The UEs described in the present document may be communicatively coupled to the base station 820 depicted in FIG. 8.

It will be appreciated by one of skill in the art that the present patent document discloses methods of adapting RRM measurements. More specifically, the patent document discloses methods where wireless devices skip or relax RRM measurements in measurement gaps. The wireless devices can then transmit or receive data in the time duration when the RRM measurements are skipped or relaxed, increasing data transmission and reception quality, speed, and efficiency. The RRM measurement relaxation can be based on a configuration, an indication, or a conflict.

Some of the embodiments described herein are described in the general context of methods or processes, which may be implemented in one embodiment by a computer program product, embodied in a computer-readable medium, including computer-executable instructions, such as program code, executed by computers in networked environments. A computer-readable medium may include removable and non-removable storage devices including, but not limited to, Read Only Memory (ROM) , Random Access Memory (RAM) , compact discs (CDs) , digital versatile discs (DVD) , etc. Therefore, the computer-readable media can include a non-transitory storage media. Generally, program modules may include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. Computer-or processor-executable instructions, associated data structures, and program modules represent examples of program code for executing steps of the methods disclosed herein. The particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.

Some of the disclosed embodiments can be implemented as devices or modules using hardware circuits, software, or combinations thereof. For example, a hardware circuit implementation can include discrete analog and/or digital components that are, for example, integrated as part of a printed circuit board. Alternatively, or additionally, the disclosed components or modules can be implemented as an Application Specific Integrated Circuit (ASIC) and/or as a Field Programmable Gate Array (FPGA) device. Some implementations may additionally or alternatively include a digital signal processor (DSP) that is a specialized microprocessor with an architecture optimized for the operational needs of digital signal processing associated with the disclosed functionalities of this application. Similarly, the various components or sub-components within each module may be implemented in software, hardware, or firmware. The connectivity between the modules and/or components within the modules may be provided using any one of the connectivity methods and media that is known in the art, including, but not limited to, communications over the Internet, wired, or wireless networks using the appropriate protocols.

While this document contains many specifics, these should not be construed as limitations on the scope of an invention that is claimed or of what may be claimed, but rather as descriptions of features specific to particular embodiments. Certain features that are described in this document in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable sub-combination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a sub-combination or a variation of a sub-combination. Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results.

Only a few implementations and examples are described, and other implementations, enhancements and variations can be made based on what is described and illustrated in this patent document.

Claims

A method of wireless communication, comprising:

receiving, by a wireless device, a configuration of a measurement gap;

relaxing, by the wireless device and based on the configuration of the measurement gap, a radio resource management (RRM) measurement; and

performing, by the wireless device, a transmission or a reception of a data burst during the measurement gap.
The method of claim 1, wherein the configuration of the measurement gap comprises a synchronization signal (SS) /physical broadcast channel (PBCH) block measurement timing configuration (SMTC) .
The method of claim 1 or 2, further comprising receiving, by the wireless device, a higher layer parameter, wherein relaxing the RRM measurement comprises at least one of:

performing, by the wireless device and based on the higher layer parameter, a relaxed RRM measurement for an intra-frequency cell or an inter-frequency cell; or

not performing the RRM measurement.
The method of any of claims 1-3, wherein relaxing the RRM measurement is based on at least one of: a threshold to a L1 reference signal received power (L1-RSRP) measurement, a threshold that determines a radio link failure (RLF) , a threshold that determines a beam failure, or a measurement report.
The method of any of claims 1-4, wherein a time gap exists between the RRM measurement and the transmission or the reception of the data burst.
The method of claim 1 or 2, wherein the wireless device operates on a cell in a frequency band, further comprising:

receiving, by the wireless device, a higher layer parameter indicating when a scheduling restriction due to RRM measurements is not applicable; and

receiving, by the wireless device, downlink control information (DCI) indicating to the wireless device to transmit or receive in a set of slots or symbols, wherein relaxing the RRM measurement comprises that the wireless device is not required to perform the RRM measurement based on a reception of a synchronization signal (SS) /physical broadcast channel (PBCH) block or a channel state information reference signal (CSI-RS) on a different cell in the frequency band.
A method of wireless communication, comprising:

receiving, by a wireless device, an indication indicating a time duration during which radio resource management (RRM) measurements can be skipped;

skipping, by the wireless device and based on the indication, RRM measurements during the time duration; and

performing, by the wireless device, a transmission or a reception of a data burst during a time period when RRM measurements are skipped.
The method of claim 7, wherein a time gap exists between receiving the indication and performing the transmission or the reception of the data burst.
The method of claim 7 or 8, further comprising receiving, by the wireless device, a synchronization signal block (SSB) configuration, wherein SSB receptions are not skipped during the time duration.
The method of any of claims 7-9, wherein the indication further indicates the wireless device to switch between a first measurement gap configuration and a second measurement gap configuration, further comprising:

starting, by the wireless device, a RRM measurement according to the first measurement gap configuration; and

stopping, by the wireless device, the RRM measurement according to the second measurement gap configuration.
The method of any of claims 7-10, wherein the indication comprises a plurality of bits, further comprising:

skipping, by the wireless device, RRM measurements for one or more subframes corresponding to a bit indicated as 0; and

not skipping, by the wireless device, RRM measurements for one or more subframes corresponding to a bit indicated as 1.
The method of any of claims 7-10, wherein the indication comprises a plurality of bits, further comprising:

skipping, by the wireless device, RRM measurements for one or more subframes corresponding to a bit indicated as 1; and

not skipping, by the wireless device, RRM measurements for one or more subframes corresponding to a bit indicated as 0.
The method of any of claims 7-12, further comprising transmitting or receiving, by the wireless device and as indicated by the indication, a data burst during a time period when measurement gaps are prioritized to transmit or receive data bursts.
The method of any of claims 7-13, wherein the indication comprises a medium access control (MAC) control element (CE) , and wherein skipping RRM measurements during the time duration comprises skipping RRM measurements in one or more measurement gaps, in half of a measurement gap, or in a part of a measurement gap.
The method of any of claims 7-14, wherein the indication is invalid after a timer expires, further comprising skipping, by the wireless device, RRM measurements if a measurement gap configuration collides with a downlink or an uplink transmission or reception.
The method of any of claims 7-15, wherein the indication is applicable to a set of serving cells of the wireless device, a set of frequency range 1 (FR1) serving cells of the wireless device, or a set of FR2 serving cells of the wireless device.
The method of claim 16, wherein the set of serving cells is indicated by downlink control information (DCI) .
A method of wireless communication, comprising:

detecting, by a wireless device, a conflict between a measurement gap and a connected mode discontinuous reception (CDRX) active time;

skipping, by the wireless device, radio resource management (RRM) measurements during a time duration of the conflict; and

performing, by the wireless device, a transmission or a reception of a data burst during a time period when RRM measurements are skipped.
The method of claim 18, wherein the wireless device terminates RRM measurements at the start of a CDRX active time.
The method of claim 18 or 19, wherein the wireless device does not perform RRM measurements and monitor a physical downlink control channel (PDCCH) at the same time.
The method of claim 18 or 19, further comprising monitoring, by the wireless device, a physical downlink control channel (PDCCH) based on a specific search space identifier (ID) for the transmission or the reception of the data burst.
The method of claim 18 or 19, further comprising monitoring, by the wireless device, a physical downlink control channel (PDCCH) based on a specific search space identifier (ID) , wherein the PDCCH schedules a physical downlink shared channel (PDSCH) for receiving extended reality (XR) data.
The method of any of claims 18-22, further comprising:

receiving, by the wireless device, an indication to adapt a measurement gap configuration; and

starting, by the wireless device and at the start or end of receiving the indication, a timer, wherein skipping RRM measurements during the time duration of the conflict comprises skipping RRM measurements before the timer expires.
The method of claim 23, wherein the timer is a plurality of measurement gap periods, and wherein at least one of the following applies:

each measurement gap within the plurality of measurement gap periods is adapted;

each measurement gap within a subset of the plurality of measurement gap periods is adapted; or

one or more measurement gaps are adapted according to the indication.
The method of claim 18 or 19, further comprising:

receiving, by the wireless device, a physical downlink control channel (PDCCH) ;

starting, by the wireless device and at the start or end of receiving the PDCCH, a timer; and

initiating, by the wireless device, a measurement gap after the timer expires.
The method of claim 25, wherein the wireless device performs no downlink or uplink transmissions during a time duration of the timer, and wherein initiating the measurement gap after the timer expires comprises initiating the measurement gap after a time shift configured by a radio resource control (RRC) configuration.
The method of any of claims 1-26, further comprising:

reporting, by the wireless device, assistance information, wherein the assistance information comprises movement information of the wireless device or information on whether downlink synchronization is maintained; or

providing, by the wireless device, RRM measurement relaxation feedback.
A method of wireless communication, comprising:

transmitting, by a network node, a configuration of a measurement gap, wherein a radio resource management (RRM) measurement is relaxed based on the configuration of the measurement gap; and

performing, by the network node, a transmission or a reception of a data burst during the measurement gap.
The method of claim 28, wherein a wireless device operates on a cell in a frequency band, further comprising:

transmitting, by the network node, a higher layer parameter indicating when a scheduling restriction due to RRM measurements is not applicable; or

transmitting, by the network node, downlink control information (DCI) indicating to the wireless device to transmit or receive in a set of slots or symbols, wherein the wireless device is not required to perform RRM measurements based on a reception of a synchronization signal (SS) /physical broadcast channel (PBCH) block or a channel state information reference signal (CSI-RS) on a different cell in the frequency band.
A method of wireless communication, comprising:

transmitting, by a network node, an indication indicating a time duration during which radio resource management (RRM) measurements can be skipped; and

performing, by the network node and based on the indication, a transmission or a reception of a data burst during a time period when RRM measurements are skipped.
The method of claim 30, further comprising transmitting, by the network node, a synchronization signal block (SSB) configuration, wherein SSB receptions are not skipped during the time duration.
The method of claim 30 or 31, further comprising transmitting or receiving, by the network node and as indicated by the indication, a data burst during a time period when measurement gaps are prioritized to transmit or receive data bursts.
A method of wireless communication, comprising:

detecting, by a network node, a conflict between a measurement gap and a connected mode discontinuous reception (CDRX) active time; and

performing, by the network node, a transmission or a reception of a data burst during a time period of the conflict when radio resource management (RRM) measurements are skipped.
The method of any of claims 28-33, further comprising:

receiving, by the network node, assistance information, wherein the assistance information comprises movement information of a wireless device or information on whether downlink synchronization is maintained; or

receiving, by the network node, RRM measurement relaxation feedback.
An apparatus for wireless communication, comprising a processor, wherein the processor is configured to implement a method recited in any one or more of claims 1 to 34.
A computer readable program storage medium having code stored thereon, the code, when executed by a processor, causing the processor to implement a method recited in any one or more of claims 1 to 34.