Method for adaptive user equipment behavior for cell reconfiguration in NR-U

Abstract

The method performed by a wireless device includes receiving a command associated with a process for establishing or releasing a cell or signal from a network node. When transmitting hybrid automatic repeat request (HARQ) feedback associated with the process for establishing or releasing the cell or signal, the wireless device detects one or more clear channel assessment (CCA) failures on an uplink signal. The wireless device extends a transmission period for transmitting HARQ feedback associated with the process for establishing or releasing the cell or signal based on the one or more CCA failures.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communications, and more particularly, to systems and methods for adaptive user equipment behavior for cell reconfiguration in New Radio Unlicensed (NRU). Background Art

[0002] The new radio (NR) standard in the 3rd Generation Partnership Project (3GPP) is being designed to provide services for a variety of use cases such as enhanced mobile broadband (eMBB), ultra-reliable and low-latency communications (URLLC), and machine-type communications (MTC). Each of these services has different technical requirements. For example, the general requirement for eMBB is high data rate with medium latency and medium coverage, while URLLC services require low latency and high reliability transmission, but may require medium data rate.

[0003] New Radio Unlicensed (NR-U) or NR in unlicensed spectrum

[0004] Some parts of the spectrum have become potentially available for licensed assisted access to unlicensed operations. Operators can use this spectrum to increase their service offerings in licensed bands by operating under a license-exempt regime or industrial, scientific, and medical (ISM), but must share with existing mobile services and other incumbent services. During the NR-U study project in 3GPP, different unlicensed bands or shared bands, such as the 2.4 GHz band, the 3.5 GHz band, the 5 GHz band, and the 6 GHz band, have been further discussed.

[0005] For the channel access mechanism, the Long Term Evolution (LTE)-Licensed Assisted Access (LAA) LBT (Listen Before Talk) mechanism is adopted as the baseline for the 5 GHz band and as the starting point for the design of the 6 GHz band. At least for bands where it is not guaranteed (e.g., by regulation) that there is no Wi-Fi, LBT can be performed in units of 20 MHz.

[0006] During LBT, the transmitting node determines whether there are no other transmissions (by performing certain measurements and comparing with thresholds), and if so, the transmitting node starts a channel occupation time (COT) that does not exceed the maximum COT (MCOT) that can vary by region; otherwise, the transmitting node stops its transmission for a certain time and can retry again later. However, unlike in LTE, there are more LBT categories in NR, and for some categories (Cat2), depending on the switching time between uplink (UL) and downlink (DL), there are also 16μs Cat2 and 25μs Cat2 LBT types (16μs Cat2 means a switch longer than 16 but shorter than 25, and 25μs Cat2 means a switch of 25 or longer). In addition, there is also the concept of UE transmitting based on the LBT process during the COT initiated by the BS (shared COT).

[0007] Similar to LTE, NR-U is expected to have a discovery signal (DRS) or similar signal, for example to enable initial access and measurements. LTE DRS only contains primary synchronization signal (PSS) / secondary synchronization signal (SSS) / cell-specific reference signal (CRS), but NR DRS can include more signals / channels.

[0008] Channel access scheme

[0009] Figure 1 LTE LBT and COT are shown, where "s" is the sensing period. In the figure, if the channel is determined to be busy, then after a certain deferral time, the user equipment (UE) may again attempt to sense on the channel to determine if the channel is available, and if so, then after a certain deterministic back-off time, the UE may start transmitting uplink (UL) bursts (during the UE's channel occupancy time), but not longer than the maximum channel occupancy time (MCOT), which may be, for example, up to 10ms, depending on the region.

[0010] Channel access schemes for NR-based access to unlicensed spectrum can be categorized into the following categories:

[0011] - Category 1 (Cat1): Transmission immediately after a short switching gap

[0012] - Category 2 (Cat2): LBT without random backoff - as in LTE

[0013] -Category 3 (Cat3): LBT with random backoff, which has a fixed-size contention window

[0014] - Category 4 (Cat4): LBT with random backoff, with a contention window of variable size For different transmissions in COT and different channels / signals to be transmitted, different categories of channel access schemes may be used. The applicability of channel access schemes is described, for example, in 3GPP TR38.889.

[0015] Channel access mechanisms for beamformed transmissions have been studied. It has been determined that omnidirectional LBT should be supported. The use of directional LBT for beamformed transmissions, i.e. LBT performed in the transmit direction, has also been studied. Further consideration of directional LBT and its benefits for beamformed transmissions is needed when specifications are to be developed, with considerations for regulation and fair coexistence with other technologies.

[0016] Example of setup or release procedures associated with UE feedback in NR

[0017] The technology can be applied to any type of setup or release process that requires the UE to send a feedback signal in response to receiving a setup or release message. An example of a feedback signal is HARQ feedback, such as an acknowledgment (ACK), a negative acknowledgment (NACK), etc. The setup or release process includes, for example, establishing a cell or signal (e.g., a beam). Examples of processes for establishing or releasing a cell may include, for example, establishing or releasing a serving cell, such as, for example, a cell change to a new / target cell, a secondary cell (SCell) activation, a secondary cell (SCell) deactivation, a serving cell (e.g., SCell) configuration, a serving cell direction activation (direction activation) (e.g., direct SCell activation, etc.), a special cell (SpCell) configuration or reconfiguration (e.g., primary secondary cell (PSCell) addition or PSCell release, etc.). The setup or release process includes, for example, establishing a signal (e.g., a beam), and the setup signal includes switching beams, such as switching a transmission configuration indicator (TCI) state.

[0018] PSCell addition in NR

[0019] In Rel-15, when a PSCell addition is received in subframe n, the UE shall be able to config PSCell The physical random access channel (PRACH) preamble is transmitted to the PSCell as follows:

[0020] T config_PSCell =T RRC_delay +T processing +T search +T Δ +T PSCell_DU +2ms

[0021] in:

[0022] -T RRC_delay The radio resource control (RRC) procedure delay as specified in 3GPP TS 38.331 for NR direct connectivity (NR-DC) and 3GPP TS 36.331 for EN-DC

[0023] -T processing is the SW processing time required by the UE, including the RF warm-up period. If the NR PSCell is in FR1, then T processing =20ms, if NR PSCell is in FR2, then T processing =40ms.

[0024] -T search is the time used for AGC settlement and PSS / SSS detection. If the target cell is known, then T search = 0ms. If the target cell is unknown, provided that the side conditions are met Then T search =3*Trsms (for FR1) and 24*Trs ms (for FR2).

[0025] -T Δ is the time used for fine time tracking of the target cell and obtaining complete timing information. For known PSCells and for unknown PSCells, T Δ =1*Trs ms.

[0026] -T PSCell_DU is the delay uncertainty in acquiring the first available PRACH opportunity in the PSCell. PSCell_DU Up to the sum of the SSB to PRACH opportunity association period and 10 ms. The SSB to PRACH opportunity association period is defined in Table 8.1-1 of 3GPP TS 38.213.

[0027] - If the UE has been provided with the SB-based Radio Resource Management (RRM) Measurement Timing Configuration Window (SMTC) configuration of the target cell in the PSCell Add message, then Trs is the SMTC periodicity of the target cell, otherwise Trs is the SMTC configured in measObjectNR with the same SSB frequency and subcarrier spacing. If no SMTC configuration or measurement object is provided to the UE on this frequency, provided that the SSB transmission periodicity is 5ms, the requirements in this section apply with Trs = 5ms.

[0028] Furthermore, the NR PSCell is known if the following conditions are met:

[0029] During the last [5] seconds before receiving the NR PSCell Configuration Command:

[0030] - the UE has sent valid measurement reports for the configured NR PSCell, and

[0031] - Depending on the cell identification condition, one of the SSBs measured from the configured NR PSCell remains detectable.

[0032] -Depending on the cell identification condition, one of the SSBs measured from the configured NR PSCell also remains detectable during the NR PSCell configuration delay.

[0033] Scell ​​activation in NR

[0034] In NR FR1, when an SCell activation command is received in time slot n, the UE shall be able to transmit a valid channel state information (CSI) report and apply the actions associated with the activation command that caused the SCell to be activated no later than the following time slots:

[0035]

[0036] in:

[0037] —T HARQ (in ms) is the timing between downlink (DL) data transmission and acknowledgment as specified in 3GPP TS 38.213.

[0038] —T activation_time is the SCell activation delay in milliseconds.

[0039] If the SCell is known and belongs to FR1, then T activation_time yes:

[0040] - If the SCell measurement period is equal to or less than 160ms, then T FirstSSB +5ms.

[0041] - If the SCell measurement period is greater than 160ms, then T SMTC_MAX +T rs +5ms.

[0042] If the SCell is unknown and belongs to FR1, then T activation_time yes:

[0043] - If the SCell can be successfully detected on the first attempt, then 2*T SMTC_MAX +2*T rs +5ms.

[0044] Where TSMTC_MAX :

[0045] For intra-band SCell activation, if the cell-specific reference signals from the active serving cell and the SCell being activated or released are available in the same time slot, then T SMTC_MAX is the longer SMTC periodicity between the active serving cell and the activated SCell; in the following cases

[0046] For inter-band SCell activation, T SMTC_MAX is the SMTC periodicity of the activated SCell.

[0047] T SMTC_MAX Limited to a minimum of 10ms.

[0048] If the UE has been provided with the SMTC configuration of the SCell in the SCell Add message, T rs is the SMTC periodicity of the activated SCell, otherwise T rs is the SMTC configured in the measObjectNR with the same SSB frequency and subcarrier spacing. If no SMTC configuration or measurement object is provided to the UE on this frequency, provided that the SSB transmission periodicity is 5ms, then rs =5ms, the application involves T rs If the SSB transmission periodicity is not 5ms, there is no requirement.

[0049] T FirstSSB :n+T HARQ +3ms later to the time of the first SSB indicated by SMTC.

[0050] —T CSI_reporting is the delay (in ms) as specified in 3GPP TS 38.331, including the uncertainty in obtaining the first available downlink CSI reference resource, the UE processing time of the CSI report, and the uncertainty in obtaining the first available CSI reporting resource.

[0051] In addition to the CSI report defined above, once the SCell is activated, the UE shall also apply other actions related to the activation command specified for the SCell in 3GPP TS 38.331 at the first opportunity of the corresponding action.

[0052] Starting from the time slot specified in clause 4.3 of 3GPP TS 38.213 (Timing of secondary cell activation / deactivation) and until the UE has completed SCell activation, the UE shall report out of range if it has available uplink resources for reporting channel quality information (CQI) of the SCell.

[0053] Furthermore, in Rel-15, an NR SCell in FR1 is known if it already meets the following conditions:

[0054] - During a period equal to max([5] measCycleSCell, Discontinuous Reception (DRX) cycle) of FR1 before receiving the SCell Activation Command:

[0055] - The UE has sent a valid measurement report for the activated SCell, and

[0056] - Depending on the cell identification conditions, the measured SSB remains detectable

[0057] - Depending on the cell identification conditions, SSBs measured during a period equal to max(5measCycleSCell, 5DRX cycle) also remain detectable during the SCell activation delay.

[0058] Otherwise, the SCell in FR1 is unknown.

[0059] In addition, when the UE receives the SCell activation command, there are several actions to be performed by the UE. In particular, for an activation command received in slot n, the UE will start or restart the sCellDeactivationTimer associated with the SCell in slot n+k, where k is on the order of several slots, but depends on the exact configuration. In the event of expiration of this timer, the UE will deactivate the SCell. The timer can be configured via RRC signaling and can take a value between 20ms and 1280ms. If the value is not configured by the network via RRC, the UE applies the value infinity, that is, the timer never expires. At least when the UE receives a physical downlink shared channel (PDSCH) transport block carrying a medium access control (MAC) packet data unit (PDU), the sCellDeactivationTimer is restarted. In the case where the SCell is configured with a physical uplink control channel (PUCCH), the deactivation of the SCell caused by the expiration of the sCellDeactivationTimer will not be implemented.

[0060] Transmission Configuration Indication (TCI)

[0061] The network node configures the UE with one active transmission configuration indication (TCI) state for the physical downlink control channel (PDCCH) and the physical downlink shared channel (PDSCH), respectively. The active TCI indicates for each channel which timing reference the UE shall assume for downlink reception. The timing reference may be with respect to an SSB index associated with a specific Tx beam, or with respect to a specific downlink reference signal (DL-RS), such as, for example, a channel state information reference signal - (CSI-RS) resource configured and provided (i.e. transmitted) to the UE by the network node.

[0062] Implicitly, the active TCI state additionally indicates to the UE which UE receive (Rx) beam to use when receiving PDCCH and / or PDSCH, as it will use the Rx beam that allows the best conditions for receiving the SSB index or DL-RS resource associated with the TCI state. Note that the best UE RX beam for a given TCI state may change over time, for example if the UE orientation changes, but must also be relatively stationary at least for short time intervals.

[0063] Up to 8 TCI states may be configured for PDSCH via higher layer signaling (RRC signaling), but only one TCI state may be active at any time. In case several TCI states are configured by the network node, the network node indicates to the UE via downlink control information (DCI) (downlink control signaling on PDCCH) which one of the pre-configured TCI states is to be activated for the upcoming PDSCH reception(s).

[0064] The TCI state may be switched by the UE based on a command received via MAC, DCI or RRC message, etc. Upon receiving the TCI state command, the UE first sends HARQ feedback to the serving cell and switches the active TCI state within a certain delay.

[0065] However, there are certain issues. For example, in Rel-15 NR, it was assumed that the gNodeB (gNB) was always able to transmit the configured signals, which is not the case in NR-U, where the possibility of transmitting a radio signal / channel depends on channel availability and the success of the LBT procedure performed by the node that needs to transmit. On the other hand, the UE cannot rely on the signals always being transmitted, and ideally it needs to determine in some way whether they are present, otherwise the UE may end up dealing only with interference and noise instead of the wanted signal. The procedures for cell reconfiguration in NR-U (e.g. PSCell addition, SCell activation, etc.) may take longer to take into account DL and / or UL LBT, but it is unclear how long that longer time is acceptable and what the UE behavior is if the time limits of one or more stages of cell reconfiguration are excessively delayed due to DL and / or UL LBT.

[0066] In addition, there is a known / unknown cell definition that determines how to perform the cell reconfiguration process, for example, for an unknown cell, the UE needs to perform additional steps, such as, for example, obtaining timing and / or performing measurements, and therefore requires more time for the entire cell reconfiguration process. Currently, the known / unknown SCell and PSCell definitions do not take LBT into account. In addition, if the Rel-15 NR known / unknown cell definition for the cell reconfiguration process is reused (unchanged) for NR-U, there is a risk that the cell will always be considered unknown, which will result in unnecessary additional steps and power consumption in the UE, and degraded UE and system performance in multi-carrier networks (e.g., networks with carrier aggregation and / or dual connectivity or multi-connectivity). Summary of the invention

[0067] Certain aspects of the present disclosure and its embodiments may provide solutions to these or other challenges.

[0068] According to certain embodiments, a method performed by a wireless device includes receiving a command associated with a process for establishing or releasing a cell or signal from a network node. When transmitting hybrid automatic repeat request (HARQ) feedback associated with the process for establishing or releasing the cell or signal, the wireless device detects one or more clear channel assessment (CCA) failures on an uplink signal. The wireless device extends a transmission period for transmitting HARQ feedback associated with the process for establishing or releasing the cell or signal based on the one or more CCA failures.

[0069] According to certain embodiments, a wireless device includes a processing circuit configured to receive a command associated with a process for establishing or releasing a cell or signal from a network node. When transmitting HARQ feedback associated with the process for establishing or releasing a cell or signal, the processing circuit is configured to detect one or more CCA failures on an uplink signal. The wireless device extends a transmission period for transmitting HARQ feedback associated with the process for establishing or releasing a cell or signal based on the one or more CCA failures.

[0070] According to certain embodiments, another method performed by a wireless device includes detecting a CCA failure while performing a procedure for establishing or releasing a cell or signal. The wireless device determines an outage window during which the wireless device cannot transmit or receive due to the CCA failure.

[0071] According to certain embodiments, another wireless device includes processing circuitry configured to detect a CCA failure when performing a procedure for establishing or releasing a cell or signal. The wireless device determines an outage window during which the wireless device cannot transmit or receive due to the CCA failure.

[0072] Certain embodiments may provide one or more of the following technical advantages. For example, one technical advantage may be that certain embodiments are adapted to NR-U to perform cell reconfiguration procedures (e.g., SCell activation, PSCell addition). As another example, a technical advantage may be that certain embodiments provide the possibility to distinguish between known cells and unknown cells during cell reconfiguration in NR-U. As yet another example, a technical advantage may be that certain embodiments provide consistent UE behavior when one or more stages of the cell reconfiguration procedure are excessively delayed due to DL and / or UL LBT.

[0073] Other advantages will be readily apparent to those skilled in the art.Some embodiments may have none, some, or all of the stated advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] For a more complete understanding of the disclosed embodiments and their features and advantages, reference is now made to the following description in conjunction with the accompanying drawings, in which:

[0075] Figure 1 LTE LBT and COT are shown;

[0076] Figure 2 illustrates an example wireless network in accordance with certain embodiments;

[0077] Figure 3 illustrates an example network node according to certain embodiments;

[0078] Figure 4 An example wireless device according to certain embodiments is shown;

[0079] Figure 5 illustrates an example user device according to certain embodiments;

[0080] Figure 6 illustrates a virtualized environment according to some embodiments, in which functionality implemented by some embodiments may be virtualized;

[0081] Figure 7 An example method performed by a wireless device according to some embodiments is shown;

[0082] Figure 8 illustrates an example virtual device according to some embodiments;

[0083] Fig. 9 An example method performed by a network node according to certain embodiments is shown;

[0084] Fig.10 Another example virtual device according to some embodiments is shown;

[0085] Fig.11 Another example method performed by a wireless device according to certain embodiments is shown;

[0086] Fig.12 Another example virtual device according to some embodiments is shown;

[0087] Fig.13 Another example method performed by a wireless device according to some embodiments is shown; and

[0088] Fig.14 Another example virtual device in accordance with some embodiments is shown. DETAILED DESCRIPTION

[0089] Generally, all terms used herein will be interpreted according to their common meaning in the relevant technical field, unless different meanings are explicitly given and / or implied from the context (using different meanings therein).Unless clearly stated otherwise, all references to one (a / an) / the element, equipment, assembly, parts, step, etc. will be openly interpreted as referring to at least one instance of the element, equipment, assembly, parts, step, etc.Unless a step is clearly described as after or before another step and / or when it is implied that a step must be after or before another step, the steps of any method disclosed herein do not have to be performed in the precise order disclosed.In any case where it is appropriate, any feature of any one of the embodiments disclosed herein may be applied to any other embodiment.Equally, any advantage of any one of the embodiments described may be applied to any other embodiment, and vice versa.From the following description, other purposes, features and advantages of the attached embodiments will be clear.

[0090] In some embodiments, the more general term "network node" is used, and it may correspond to any type of radio network node or any network node that communicates with a UE and / or with another network node. Examples of network nodes are radio network nodes, gNodeB (gNB), ng-eNB, base station (BS), NR base station, TRP (transmission reception point), multi-standard radio (MSR) radio node (such as MSR BS), network controller, radio network controller (RNC), base station controller (BSC), relay, access point (AP), transmission point, transmission node, remote radio unit (RRU), remote radio head (RRH), node in a distributed antenna system (DAS), core network node (e.g., mobile switching center (MSC), mobility management entity (MME), etc.), operation and maintenance (O&M), operation support system (OSS), self-optimizing network (SON), positioning node or location server (e.g., evolved serving mobile location center (E-SMLC)), minimization of drive test (MDT), test equipment (physical node or software), etc. A radio network node is a network node capable of transmitting radio signals, such as a base station, gNB, etc.

[0091] In some embodiments, the non-limiting term user equipment (UE) or wireless device is used and refers to any type of wireless device that communicates with a network node and / or with another UE in a cellular or mobile communication system. Examples of UEs are NR-enabled wireless devices, target devices, device-to-device (D2D) UEs, machine-type UEs or UEs capable of machine-to-machine (M2M) communication, PDAs, PADs, tablet computers, mobile terminals, smart phones, laptop embedded devices (LEEs), laptop mounted devices (LMEs), drones, USB dongles, ProSe UEs, V2V UEs, V2X UEs, etc.

[0092] The term "radio node" may refer to a radio network node or a UE capable of transmitting radio signals or receiving radio signals or both.

[0093] The term time resource as used herein may correspond to any type of physical resource or radio resource expressed in terms of a time length or time interval or duration. Examples of time resources are: symbol, mini-slot, time slot, subframe, radio frame, TTI, interleaving time, etc.

[0094] The term TTI as used herein may correspond to any period over which a physical channel may be encoded and interleaved for transmission. The receiver decodes the physical channel in the same period (T0) in which the physical channel was encoded. TTI may also be interchangeably referred to as short TTI (sTTI), transmission time, slot, subslot, microslot, short subframe (SSF), micro subframe, etc.

[0095] Unless explicitly stated, the term LBT used herein may include DL LBT, UL LBT, or both. DL LBT may be performed by a radio network node, while UL LBT may be performed by a UE, so generally speaking LBT may be performed by a radio node. The term "LBT category" or "LBT type" refers to a set of parameters that characterize the LBT process, including but not limited to: LBT categories described in Section 2.1, LBT with different switching delays between UL and DL (e.g., up to 16 μs, longer than 16 but shorter than 25, or 25 μs and above), beam-based LBT (LBT in a specific direction) or omnidirectional LBT, different LBT methods in the frequency domain (e.g., sub-band specific, broadband LBT on multiple continuous sub-bands, broadband LBT on multiple non-contiguous sub-bands, etc.), LBT with or without shared COT (shared COT is, for example, when COT is initiated by the gNB and transmitted within the COT without performing LBT), single sub-band or multi-sub-band or broadband LBT.

[0096] The term LBT as used herein may correspond to any type of carrier sense multiple access (CSMA) process or mechanism performed by a node on a carrier before deciding to transmit a signal on the carrier. CSMA or LBT may also be interchangeably referred to as clear channel assessment (CCA), clear channel determination, etc. Signal transmission on a carrier subject to LBT is also referred to as contention-based transmission. On the other hand, signal transmission on a carrier not subject to LBT is also referred to as contention-free transmission.

[0097] The term clear channel assessment (CCA) used herein may correspond to any type of CSMA process or mechanism performed by a device on a carrier before deciding to transmit a signal on the carrier. CCA is also interchangeably referred to as a CSMA scheme, a channel assessment scheme, listen before talk (LBT), etc. Operations based on CCA are more generally referred to as contention-based operations. Signal transmission on a carrier subjected to CCA is also referred to as contention-based transmission. Contention-based operations are typically used for transmissions on carriers in unlicensed bands. However, the mechanism may also be applied to operations on carriers belonging to licensed bands, for example to reduce interference. Signal transmission on a carrier not subjected to CCA is also referred to as contention-free transmission.

[0098] LBT or CCA may be performed, for example, by the UE (before UL transmission) and / or the base station (before DL transmission).

[0099] The term "COT configuration" may include one or more parameters characterizing the start of the COT, the length of the COT, the end of the COT, the carrier frequency to which the COT applies, a shared or unshared COT, a fixed length COT or a variable length COT, etc.

[0100] The term DRS is used herein to refer to one or more signals transmitted by a radio network node. DRS may include, for example, SSB (defined in TS 38.133), PSS / SSS, PBCH, CSI-RS, (one or more) RMSI-CORESET, (one or more) RMSI-PDSCH, OSI, paging, etc. DRS may also be included in a mode configuration such as SMTC or DMTC.

[0101] The term establishment or release (also interchangeably referred to herein as cell (re) configuration) process as used herein refers to any type of process that requires the UE to send a feedback signal in response to receiving a setup or release message (e.g., SCell activation / deactivation command, PSCell add / release message, cell change (e.g., handover, etc.), TCI state switching command, etc.). The embodiment is applicable to any type of establishment or release process that requires the UE to send a feedback signal in response to receiving a setup or release message. An example of a feedback signal is HARQ feedback, such as ACK, negative acknowledgement (NACK), etc. The establishment or release process includes, for example, establishing a cell or signal (e.g., a beam). Examples of processes for establishing or releasing a cell include, for example, establishing or releasing a serving cell, such as a cell change to a new / target cell, SCell activation, SCell deactivation, configuration of a serving cell (e.g., SCell), directional activation of a serving cell (e.g., direct SCell activation, etc.), configuration or reconfiguration of a special cell (SpCell) (e.g., PSCell addition or PSCell release, etc.). Examples of processes for establishing or releasing a signal (e.g., a beam) include switching beams, such as switching TCI states, etc.

[0102] The embodiments are described for NR-U. However, the embodiments are applicable to any other system with unlicensed operation, such as other RAT or multi-RAT systems in which the UE receives and / or transmits signals (e.g., data), such as NR, LTE frequency division duplex (FDD) / time division duplex (TDD), LTE LAA and its enhancements, wide code division multiple access (WCDMA) / high speed packet access (HSPA), WiFI, wide local area network (WLAN), LTE, fifth generation (5G), etc.

[0103] In addition, terminology such as base station / gNodeB and UE should be considered non-restrictive and especially does not imply a certain hierarchical relationship between the two; generally, "gNodeB" can be regarded as device 1, and "UE" can be regarded as device 2, and the two devices communicate with each other through a certain radio channel. And in the following, a transmitter or a receiver can be a gNB or a UE.

[0104] According to certain embodiments, a method performed by a wireless device is provided. In a particular embodiment, the wireless device may include a UE.

[0105] According to certain embodiments, a scenario may include a wireless device (such as, for example, a user equipment (UE)) that is configured to establish or release a cell (e.g., activated SCell, PSCell addition, cell change, etc.) or establish or release a signal such as a beam (e.g., TCI state switching), and in response to receiving an establishment or release command (e.g., a MAC CE command), the wireless device needs to send a feedback signal on a serving cell subject to CCA, and / or the wireless device should be able to transmit feedback or a valid measurement report. During these processes, the wireless device may also need to receive signals that may not be transmitted due to a CCA failure at the base station.

[0106] For example, according to some embodiments, a method provided by a wireless device includes: upon receiving a command for establishing or releasing a cell or signal (e.g., PSCell addition, SCell activation, TCI state switching, etc.), the wireless device performs a variable period (T v ) performs the establishment or release process, the variable period (T v ) at least as the wireless device is unable to transmit signals in the serving cell due to one or more CCA failures experienced by the UE during the period (T v ) is increased by the number of times (N) that the HARQ feedback is sent to the serving cell during the UL CCA period. For example, in a specific embodiment, there are at least two times N1 and N2 (N2>1N1) that the UE cannot transmit due to UL CCA failure, and there are at least two corresponding time periods Tv1 and Tv2 (Tv2>Tv1).

[0107] According to some embodiments, the UE is configured with a function that allows the UE to v ), i.e., N≤Nmax. When the maximum value is exceeded, for example, when J>Nmax, the UE is required to perform one or more operational tasks. Examples of such tasks include: stopping the process, restarting the process, retrying to send HARQ feedback after a certain delay, etc. In order to ensure that the UE continues to perform the process even if there are up to Nmax CCA failures in the UL, the UE can be configured with a set of uplink resources (e.g., scheduling grants, etc.) by the serving cell or based on predefined rules.

[0108] The setup or release process may cause an interruption to one or more serving cells (e.g., a primary cell (PCell), an activated SCell, etc.) during the interruption period. According to another aspect of the embodiment, when the interruption period begins, the UE adjusts a start time instance (Tstart). The time instance Tstart includes a variable time instance that increases at least with the number of times the UE fails to send HARQ feedback to the serving cell during the time when the setup or release process is performed (e.g., during which the SCell is activated).

[0109] For example, according to certain embodiments, a wireless device (such as, for example, a user equipment (UE)) performing a cell configuration procedure (e.g., PSCell addition, SCell addition, SCell activation, active TCI state switching, or active TCI state list update) on a carrier frequency subject to CCA for multi-carrier operation adapts the cell configuration procedure to DL and / or UL CCA failure by performing the following operations:

[0110] ● determining whether the cell being configured (e.g., a PSCell being added or an SCell being activated) is known or unknown based on one or more rules appropriate for operation in the presence of a CCA failure,

[0111] 0 In one example, the step may include determining whether at least one report was sent to the network during a time T before the time when the cell configuration process was triggered, where the trigger may, for example, include receiving a command from a network node, and where T depends on the CCA impact; if so, the cell is considered known, otherwise it is unknown. 0 In another example, the step may include selectively paying attention to detectability (measured by one or more radio conditions (e.g., Es / Iot)) only when no CCA failure has occurred.

[0112] • Depending on the above determination results, a first cell configuration procedure is selected for a known cell on a carrier with CCA, and a second cell configuration procedure is selected for an unknown cell on a carrier with CCA.

[0113] ● performing the selected cell configuration procedure while satisfying one or more performance-related objectives further determined for the selected configuration procedure (the objectives may be, for example, requirements to complete the procedure within a certain time, not create interruptions within a certain time interval, send a certain report or feedback in a timely manner, etc.), and

[0114] 0 Determine one or more thresholds characterizing the maximum allowed DL and / or UL CCA impact

[0115] ■Any one or more of the thresholds may be predefined or configurable by the network node and may be determined based on predefined rules or a function of one or more other parameters (e.g., the measured or transmitted signal configuration such as periodicity and / or density and / or bandwidth, the frequency range over which the cell configuration is performed, the DRX cycle length, the measurement cycle length, the MGRP, the DTX cycle length, the method and / or number of samples used to detect the presence of a signal to be received / measured or to determine DL CCA failure, etc.) - for example, the longer the periodicity of the signal or measurement pattern, the lower the threshold because, even in the absence of CCA, the CCA impact is less tolerated when the process time for the configuration is long.

[0116] 0 Determine one or more types of actual CCA impact, where each type corresponds to one or more determined thresholds

[0117] ■ For example, using one or more counters or timers to determine CCA impact, for example, to count CCA failures or missed signal reception / measurement opportunities / transmissions due to CCA failures.

[0118] ○ If the determined actual CCA impact (e.g., the number of measurements or SMTC or transmission opportunities that are unavailable at the UE due to DL CCA failure or the additional delay due to UL CCA failure) is lower than the corresponding determined threshold, the selected process is completed.

[0119] ○ If the determined actual CCA impact of one or more types is above the corresponding determined threshold, then the selected process is abandoned,

[0120] 0 If the determined actual CCA impact of a certain type is higher than the corresponding determined threshold, restart the selected process or its sub-process; but after N restart attempts and failure to complete, abandon the selected process.

[0121] 0 If the determined actual CCA impact of a certain type is higher than the corresponding determined threshold, the selected process or its sub-process is restarted; but after the timer (e.g., sCellDeactivationTimer) expires, the selected process is abandoned.

[0122] 0 Select either of the above two methods (threshold-based or timer-based), where the selected method depends on, for example, whether a timer value (e.g., sCellDeactivationTimer value) has been configured. If not configured, the UE abandons the selected process after N failed attempts, otherwise it will continue forever; and if configured, the UE abandons the selected process when the configured timer expires.

[0123] ○ The above method (whether to choose to abandon the process after N attempts or after the timer expires) depends on the value of the timer. For example, if the timer value has been configured, but is greater than a threshold (e.g., the sCellDeactivation timer value is 320ms), the UE abandons the selected process after N failed attempts; otherwise, it abandons the selected process after the timer expires.

[0124] o Transmit feedback (e.g., predefined reports or HARQ feedback) while adapting to the interruption requirements and taking into account CCA impact, e.g., adapting the start time of the interruption, such as Tstart=X+(1+N)*T feedback，N, where N is the number of UL CCA failures (which the UE will count), and X is a predefined fixed time since the UE received the cell (re)configuration command, e.g. X=1 or 2 time slots.

[0125] 0 Adapt to the results of DL and / or UL CCA results to determine the outage window. For example, the UE determines the left boundary and / or time boundary of the outage window and ensures that the outage does not occur outside the allowed outage window. For example, the left boundary of the window can be n+1+(1+N)*T HARQ , and the right boundary of the interruption window can be n+1+(1+N)*T HARQ +3ms+T SMTC_MAX +T SMTC_duration .

[0126] Example of PSCell addition

[0127] In the presence of LBT, the wireless device may need to correctly distinguish between the known and unknown states of the PSCell, otherwise the PSCell may, for example, always be considered unknown, which means longer process delays. In order to adapt to the known PSCell cell definition for NR-U, several aspects need to be updated, including the time since the last measurement report, the ability of the UE to send reports in the presence of UL LBT, detectability that cannot always be guaranteed due to LBT, etc.

[0128] In one example, a PSCell is known if it already meets the following conditions:

[0129] During the time T before the reception of the NR PSCell configuration command:

[0130] - the UE has sent a valid measurement report for the NR PSCell being configured, and

[0131] - Depending on the cell identification condition, one of the SSBs measured from the NR PSCell being configured remains detectable.

[0132] - In the event that an SSB is available at the UE, depending on the cell identification condition, one of the SSBs measured from the NR PSCell being configured also remains detectable during the NR PSCell configuration delay.

[0133] Otherwise it is unknown.

[0134] The time T before the reception of the PSCell configuration command is extended to take into account DL LBT, e.g., T noLBT +L*T RS +Δ, where

[0135] —T noLBTcorresponds to the time specified for Rel-15 NR without CCA (5 seconds),

[0136] —L is the actual (in one example) or maximum acceptable (in another example) number of measurement or SMTC opportunities that are unavailable at the UE due to CCA, which can be a fixed predefined or configurable number, or can be based on a UE counter.

[0137] Δ is the additional actual reporting delay (in one example) or the maximum acceptable delay (in another example) due to UL CCA failure, and provided that UL resources are configured for the UE, the UE retries to report at least 1 measurement for the PSCell being configured (for channel access category 1, Δ=0), where Δ UL It may be a fixed predefined or configurable number, or may be defined based on a rule that is a function of one or more other parameters, or may depend on the actual number of UL transmission attempts and / or the UL resource configuration used for UL transmission.

[0138] In one example, each of L and / or Δ can be defined based on a rule that is a function of one or more other parameters (e.g., the configuration of the measured DL and transmitted UL signals, such as periodicity and / or density and / or bandwidth, discontinuous reception (DRX) cycle length, signal-to-interference and noise ratio (SINR), frequency range of configured SCells, DRX or DTX cycle length, etc.), or can depend on the actual number of DL reception and UL transmission attempts, respectively, etc.

[0139] In another example, the UE may also count the number of DL and / or UL CCA failures to determine L and / or Δ, respectively, and calculate T to further determine whether at least one measurement report exists, and so on.

[0140] In yet another example, there may also be a maximum allowed value of L and / or Δ (eg, L≤L max and / or Δ≤Δ max ), which can be predefined or configurable. When L is exceeded max or Δ max , the UE may consider the SCell to be unknown and perform the corresponding SCell activation process accordingly.

[0141] In yet another example, there may also be a maximum value of T, such as T max The UE can calculate T and compare it with T max For comparison, when it exceeds T max When , the UE may consider the SCell to be unknown and perform the corresponding SCell activation process accordingly.

[0142] PSCell addition process for known / unknown SCells in NR-U

[0143] When a PSCell addition is received in subframe n, the UE shall be able to send the PSCell addition no later than subframe n+T config PSCell The PRACH preamble is transmitted to the PSCell in

[0144] T config_PSCell =T RRC_delay +T processing +T search +T Δ +(T PSCell_DU,ref +Δ PRACH )+2ms,

[0145] in

[0146] —For a known PSCell, T search =0, and T search =(24+L1)*Trs,

[0147] —T Δ =Trs*(1+L2),

[0148] —L1≤L1 max and L2≤L2 max is the corresponding number of measurement or SMTC opportunities that are not available at the UE due to CCA failure,

[0149] —T PSCell_DU，ref is the delay uncertainty for acquiring the first PRACH opportunity in the PSCell without considering CCA, and the sum of the SSB to PRACH opportunity association period and 10ms. The SSB to PRACH opportunity association period is defined in Table 8.1-1 of TS 38.213,

[0150] —Δ PRACH ≤Δ PRACH，max is the additional delay from the first PRACH opportunity to the PRACH opportunity at which the UE can transmit, due to UL LBT failure and UE retrying to transmit PRACH (Δ PRACH It may depend on the channel access category, e.g. for channel access category 1 it is 0), and therefore on the number of times the UE attempts to obtain a channel for transmission.

[0151] In one example, the maximum value of L1 (eg, L1 maxRepresentation) can be predefined or configurable by the network node, or determined based on predefined rules or as a function of one or more other parameters (for example, the configuration of the measured DL signal, such as periodicity and / or density and / or bandwidth, DRX cycle length, SINR, frequency range of the PSCell being added, SMTC periodicity, MGRP, etc.), etc.

[0152] ● In a further example, when L1 is exceeded max , the UE can abandon the PSCell adding process.

[0153] ●In another example, when exceeding L1 max The UE may restart the search, but after N1 unsuccessful attempts to complete the search process, the UE may give up adding the PSCell.

[0154] In another example, the maximum value of L2 (eg, by L2 max Representation) can be predefined or configurable by the network node, or determined based on predefined rules or as a function of one or more other parameters (for example, the configuration of the measured DL signal, such as periodicity and / or density and / or bandwidth, DRX cycle length, SINR, frequency range of the PSCell being added, SMTC periodicity, MGRP, etc.), etc.

[0155] ● In a further example, when exceeding L2 max , the UE can abandon the PSCell adding process.

[0156] ● In another example, when exceeding L2 max , the UE may restart the timing acquisition, but after N2 unsuccessful attempts to complete the timing acquisition process, the UE may abandon the PSCell addition.

[0157] In another example, Δ PRACH The maximum value (for example, by Δ PRACH，max The PRACH period (indicated) may be predefined or configurable by the network node, or determined based on predefined rules or as a function of one or more other parameters (e.g., PRACH configuration, such as periodicity, frequency range in which the PSCell is being added, DTX cycle length, etc.).

[0158] ● In a further example, when more than Δ PRACH，max When , the UE can stop attempting to transmit PRACH and can abandon the PSCell addition process.

[0159] ● In another example, when more than Δ PRACH，maxThe UE may retransmit the PRACH when K times are unsuccessful (at least when there are UL resources configured for this); but after K times without success, the UE may stop trying to transmit the PRACH and may abandon the PSCell addition procedure.

[0160] Known / Unknown SCells Definition in NR-U

[0161] If an SCell on a carrier subject to CCA has satisfied the following conditions, then the SCell is known:

[0162] - During the period T before the reception of the SCell activation command:

[0163] - the UE has sent a valid measurement report for the SCell being activated, and

[0164] - According to the cell identification conditions in clauses 9.2 and 9.3 of 3GPP TS 38.133, the SSB remains detectable at the times when the SSB is available at the UE (eg, not missed due to CCA).

[0165] - Depending on the cell identification conditions, the SSBs measured during period T also remain detectable during the SCell activation delay when the SSBs are available at the UE.

[0166] Otherwise, the SCell is unknown.

[0167] In the above, the period T can be defined as follows:

[0168] ●(5+L DL )measCycleSCell+Δ UL , when DRX is not configured, and

[0169] ●max((5+L DL )measCycleSCell,(5+L DL )DRX cycle)+Δ UL , when DRX is configured, where:

[0170] —L DL is the actual (in one example) or maximum acceptable (in another example) number of measurement opportunities with SSBs unavailable at the UE due to CCA, which may be a fixed predefined or configurable number, or may be based on a UE counter.

[0171] —Δ UL is the additional delay caused by the actual or maximum acceptable UE inability to send valid measurement reports on the carrier frequency with CCA (for UL channel access category 1, Δ UL=0, otherwise it>0), where Δ UL It may be a fixed predefined or configurable number, may be defined based on a rule as a function of one or more parameters, or may depend on the actual number of UL transmission attempts and / or the UL resource configuration used for UL transmission.

[0172] In one example, L DL and / or Δ UL Each of which may be defined based on rules that are a function of one or more other parameters (e.g., the configuration of the measured DL and transmitted UL signals, such as periodicity and / or density and / or bandwidth, DRX cycle length, SINR, frequency range for which SCells are configured, DRX or DTX cycle length, etc.), or may depend on the actual number of DL reception and UL transmission attempts, respectively, etc.

[0173] In another example, the UE may also count the number of DL and / or UL CCA failures to determine the L DL and / or Δ UL , and T is calculated to further determine whether there is already at least one measurement report, and so on.

[0174] In yet another example, there may also be L DL and / or Δ UL The maximum permissible value (for example, L DL ≤L DL，max and / or Δ UL ≤Δ UL，max ), which can be predefined or configurable. When L is exceeded DL，max or Δ UL，max , the UE may consider the SCell to be unknown and perform the corresponding SCell activation process accordingly.

[0175] In yet another example, there may also be a maximum value of T, such as T max The UE can calculate T and compare it with T max For comparison, when it exceeds T max When , the UE may consider the SCell to be unknown and perform the corresponding SCell activation process accordingly.

[0176] SCell activation procedure for known / unknown SCells in NR-U

[0177] When an SCell activation command is received in time slot n, the UE shall be able to transmit a valid CSI report and apply the actions related to the activation command for activating the SCell no later than the following time slot.

[0178]

[0179] in:

[0180] —T HARQ =T HARQ，ref +Δ HARQ , where T HARQ，ref is the timing (in ms) between DL data transmission and acknowledgment as specified in TS 38.213 [3], and if resources are configured for the UE, then Δ HARQ is the delay in HARQ feedback due to UL CCA failure and UE retrying to transmit HARQ feedback (for channel access category 1, Δ HARQ =0),

[0181] —t activation_time is defined as follows (where L1, L2 and L3 are the corresponding numbers of SSB opportunities that are unavailable at the UE due to CCA failure):

[0182] ■For a known SCell:

[0183] T FirstSSB +T rs *L1+5ms, if the SCell measurement period is equal to or less than 160ms,

[0184] (T SMTC_MAX +T rs )*(1+L2)+5ms, if the SCell measurement period is greater than 160ms.

[0185] ■For unknown SCell:

[0186] (T SMTC_MAX +T rs )*(2+L3)+5ms, assuming that the SCell can be successfully detected in one attempt,

[0187] T CSI_reporting =T CSI_reporting，ref +Δ CSI , where T CSI_reporting，ref is the delay (in ms) including the uncertainty in obtaining the first available downlink CSI reference resource, the UE processing time for CSI reporting and the uncertainty in obtaining the first available CSI reporting resource, as specified in 3GPP TS 38.331 R4-1907331, WF on RRMrequirements for NR-U, Ericsson, May 2019, and provided that resources are configured for the UE, then Δ CSI is the additional delay due to UL CCA failure and UE retrying to transmit CSI reports (for channel access category 1, Δ CSI =0).

[0188] The UE may maintain a time interval for determining Δ HARQ , L1, L2, L3 and Δ CSI One or more counters and / or timers of any one of the.

[0189] In one example, there may also be Δ HARQ The maximum value (for example, by Δ HARQ，max ), which can be predefined or configurable by the network node, or determined based on predefined rules or as a function of one or more other parameters (e.g., HARQ configuration, frequency range of the SCell being activated\DTX cycle length, etc.).

[0190] ● In a further example, when more than Δ HARQ，max , the UE may stop attempting to transmit HARQ feedback and may abandon the SCell activation process.

[0191] ● In another example, when more than Δ HARQ，max The UE may retransmit the HARQ feedback (at least when there are UL resources configured for this) when K times are unsuccessful; but after K times without success, the UE may stop trying to transmit the HARQ feedback and may abandon the SCell activation procedure.

[0192] In another example, there may also be a maximum value of any one of L1, L2, and L3 (for example, L1 max 、L2 max and L3 max Representation), which can be predefined or configurable by the network node, or determined based on predefined rules or as a function of one or more other parameters (for example, the configuration of the measured DL signal, such as periodicity and / or density and / or bandwidth, DRX cycle length, SINR, frequency range of the PSCell being added, SMTC periodicity, MGRP, etc.), etc.

[0193] ● In a further example, when L1 is exceeded max 、L2 max and L3 max When any of the above happens, the UE may stop activating the SCell and may abandon the SCell activation process.

[0194] ●In another example, when exceeding L1 max 、L2 max and L3 max When the UE restarts the process related to acquiring cell timing, the UE may abandon the SCell activation process after N unsuccessful restarts.

[0195] ●In another example, when L1 is exceededmax 、L2 max and L3 max , the UE may restart the process related to acquiring cell timing; however, after the sCellDeactivationTimer expires, the UE abandons the SCell activation process.

[0196] ●In another example, when L1 is exceeded max 、L2 max and L3 max , the UE may restart the process related to acquiring cell timing; however, after sCellDeactivationTimer expires and if the configured value is lower than the threshold (e.g. 320ms), the UE abandons the SCell activation process, otherwise after N failed attempts, the UE abandons the SCell activation process.

[0197] In another example, there may also be Δ CSI The maximum value (for example, by Δ CSI.max ), which can be predefined or configurable by the network node, or determined based on predefined rules or as a function of one or more other parameters (e.g., UL signal configuration, such as periodicity and / or density and / or bandwidth, frequency range of activated SCells, DTX cycle length, etc.).

[0198] ● In a further example, when more than Δ CSI.max , the UE may stop attempting to transmit CSI reports and may abandon the SCell activation process.

[0199] ● In another example, when more than Δ CSI.max The UE may retransmit the CSI report (at least when there are UL resources configured for this); however, after M unsuccessful attempts, the UE may abandon the SCell activation procedure.

[0200] Interruptions due to SCell activation

[0201] After sending HARQ feedback to the serving cell, the UE may cause an interruption for a certain period (Tinterrupt). According to another aspect of the embodiment, when the interruption period starts, the UE adjusts the starting time instance (Tstart) depending on the CCA result. The time instance Tstart includes a variable time instance that increases at least with the number of times the UE cannot send feedback (e.g., HARQ feedback or a predefined report such as a CQI report or L1-RSRP report with a predefined value) to the serving cell during the time when the SCell is activated. For example:

[0202] Tstart=X+f(N,T feedback )

[0203] in

[0204] —X is a predefined time resource from the moment when the UE receives the SCell activation command, for example, X is expressed in time slots, such as X=1 or 2.

[0205] —N is the number of times the UE fails to send HARQ feedback during the time when the SCell is activated or the number of times the UE attempts (including the last success) to transmit feedback; there may also be a maximum value Nmax, where N≤Nmax, when Nmax is exceeded, the UE is not allowed to cause any more interruptions and Tstart is extended; in the latter case, the UE may decide to abandon the SCell activation in one example, or decide to restart the process in another example;

[0206] —T feedback It is the time from a reference time (e.g., from a previous opportunity or from receiving a DL data transmission or UL transmission grant [transmitted in DL] or receiving or decoding a cell (re)configuration command or message or information about the need for the UE to provide feedback) to the next opportunity for transmitting feedback (e.g., to the first opportunity or between opportunities, etc.). In one example, the UL opportunities may be equally spaced or periodic, e.g., T feedback，i =T feedback ; In another example, T feedback It can be the maximum time between any two consecutive occasions, and so on.

[0207] —f(N,T feedback ) is N and T feedback N is the number of UL transmission opportunities missed due to UL CCA failure. feedback It is the time from a reference time (e.g., DL reception or decoding of a message or channel for which the UE needs to provide feedback, or the previous UL transmission opportunity where the UE failed to transmit) to the next UL transmission opportunity or the last UL transmission (where the UE acquires the channel and transmits feedback).

[0208] f(N, T) can be measured, for example, in a time slot feedback ).

[0209] —In another example, f(N, T feedback )=(T HARQ +Δ HARQ，L ) / slot_length, where T HARQ As defined in the current specification and also as shown in some of the examples above, and Δ HARQ，Lis the additional delay caused by L missed HARQ feedback opportunities after the first HARQ feedback opportunity until HARQ feedback is sent in the last opportunity, and slot_length is the NR slot length defined in 38.211, which depends on the subcarrier spacing (SCS).

[0210] —In another example, f(N, T feedback )=Δ HARQ，N It is the additional cumulative delay from the first UL resource to the Nth UL resource for UE feedback due to (N-1) UL LBT failures (the cumulative delay can be the sum of the individual delays between UL resource i and UL resource (i+1), where i=1…N is the number of UL LBT failures) plus the delay between the DL transmission for feedback transmission and the first UL resource.

[0211] —In another example, f(N, T feedback ) is the additional cumulative delay from the first UL resource to the Nth UL resource for UE feedback due to (N-1) UL LBT failures (the cumulative delay can be the sum of the individual delays between UL resource i and UL resource (i+1), where i=1…N is the number of UL LBT failures) plus the delay between the DL transmission for feedback transmission and the first UL resource.

[0212] In another example, the UE may HARQ，N To determine the left and / or right time boundaries of the interruption window and ensure that the interruption does not occur outside the allowed interruption window. In a further example, the left boundary of the window is n+1+f(N, T feedback ), and the right edge of the interrupt window is n+1+f(N, T feedback )+3ms+T SMTC_MAX +T SMTC_duration .

[0213] In another example, the start time of the UE interruption and the interruption window need to be dynamically adapted to the UL LBT result. That is, the corresponding interruption should not occur in the time slot n+1+f(N, T feedback ) and should not occur in time slot n+1+(f(N,T feedback )+3ms+T SMTC_MAX +T SMTC_duration ) / slot_length.

[0214] Other examples of active TCI state transitions

[0215] In another example, the UE receives a setup command to switch the TCI state on a serving cell (e.g., on a PCell, SCell, PSCell, SpCell, etc.). For example, the command includes a MAC-CE command received from the serving cell. In response to receiving the TCI state switching command, the UE sends at least one HARQ feedback signal to the serving cell that is subjected to CCA at least for uplink transmission. In one example, the UE is requested to switch the TCI state on a SpCell (e.g., a PCell or a PSCell), while the UE also sends HARQ feedback on the SpCell when the SpCell is subjected to CCA. In another example, the UE is requested to switch the TCI state on the SCell, while the UE sends HARQ feedback on the SpCell. According to this embodiment, upon receiving the TCI state switching command, the UE sends the HARQ feedback signal to the serving cell during a variable period (T TCI ) switches the TCI state within the variable period (T TCI ) at least as the UE TCI Due to one or more CCA failures experienced by the UE for transmitting signals in the uplink, the UE may not be able to transmit HARQ feedback to the serving cell during T TCI The UE may send the HARQ feedback one or more times within the UE. The UE's inability to transmit the HARQ feedback corresponds to the UE missing the transmission of the HARQ feedback signal.

[0216] UE in time period (T TCI ) is represented by parameter J. According to another aspect, the UE is configured with a function that allows the UE to send HARQ feedback to the serving cell during the period (T TCI ) during which the UE misses the maximum number of HARQ feedback transmissions to the serving cell (represented by Jmax), i.e., J≤Jmax. When J>Jmax, the UE is required to perform one or more operational tasks. Examples of such tasks include: stopping the TCI state switching process, restarting the TCI state switching process, using an old or previous or reference TCI state (e.g., predefined or configured, etc.) to receive a signal (e.g., PDSCH, PDCCH, etc.), retrying to send HARQ feedback after a certain delay, etc.

[0217] A variable TCI state switching period as a function of the maximum allowed number of missed HARQ feedbacks in uplink allows the UE to continue the TCI state switching procedure even if there are up to Kmax number of CCA failures in the uplink in the serving cell where HARQ is to be sent.

[0218] In order to implement the above mechanism (wherein the UE continues the TCI state switching process even if there are up to Jmax number of CCA failures), the UE may be configured with a set of uplink resources (e.g., scheduling grants, etc.) for enabling the UE to send HARQ when the UE is able to send HARQ in the serving cell (e.g., when CCA succeeds in the uplink of the serving cell). The UE may be configured with a set of uplink resources by the serving cell or based on predefined or preconfigured information, etc. The configured number of uplink resources (e.g., time resources such as uplink time slots) includes Jmax. The resources may be continuous or non-continuous time resources.

[0219] The above embodiment is described below by means of specific examples:

[0220] If the target TCI state is known, upon receiving a PDSCH carrying a MAC-CE activation command at timeslot n, the UE shall be able to receive PDCCH on the new beam of the serving cell for which the TCI state switch occurs no later than the following timeslots:

[0221] n+(1+J)T HARQ,J +3ms+TO k *(T first-SSB +T SSB-proc ).

[0222] The UE shall be able to receive the old TCI state until the following time slots:

[0223] n+(1+J)T HARQ,J +3ms+TO k *(T first-SSB ).

[0224] in:

[0225] —T first-SSB is the time after the TCI status command is received by the UE to the first SSB transmission;

[0226] —T SSB proc =2ms;

[0227] - If the target TCI state is not in the active TCI state list for PDSCH, then TO k =1, otherwise 0;

[0228] - J is the number of times the UE cannot send HARQ feedback, where J ≤ Jmax;

[0229] —T HARQ，J is the timing between a DL data transmission and the sent acknowledgement (ACK) when the UE is able to send an ACK in the Jth resource assigned to the ACH transmission.

[0230] If the target TCI state is unknown, then upon receiving a PDSCH carrying a MAC-CE activation command at timeslot n, the UE shall be able to receive PDCCH on a new beam of the serving cell for which a TCI state switch occurs no later than the following timeslots:

[0231] n+(1+J)T HARQ,J +3ms+T L1-RSRP +TO uk *(T first-SSB +T SSB-proc )

[0232] The UE shall be able to receive the old TCI state until the following time slots:

[0233] n+(1+J)T HARQ,J +3ms+T L1-RSRP +TO k *(T first-SSB ).

[0234] in:

[0235] —T L1-RSRP is the time of L1-RSRP measurement used for Rx beam refinement.

[0236] —T first-SSB It is the time from when the MAC CE command is decoded by the UE to when the first SSB is transmitted;

[0237] —For L1-RSRP measurement based on CSI RS, TO uk =1, and for L1-RSRP measurement based on SSB TO uk =0

[0238] If the UE does not measure and report the target TCI state before the TCI state switch, then when a PDSCH carrying a MAC-CE activation command is received at timeslot n, the UE shall be able to receive PDCCH on the new beam of the serving cell where the TCI state switch occurs no later than the following timeslots:

[0239] n+(1+J)T HARQ,J +3ms+T L1-RSRP +TO uk *(T first-SSB +T SSB-proc ).

[0240] The UE shall be able to receive the old TCI state until the following time slots:

[0241] n+(1+J)T HARQ,J +3ms+T L1-RSRP +TOk *(T first-SSB )

[0242] If the target TCI state is known, then when a PDSCH carrying an update to the MAC-CE active TCI state list is received at timeslot n, the UE shall be able to receive a PDCCH to schedule a PDSCH with the new TCI state no later than the following timeslots:

[0243] n+(1+J)T HARQ,J +3ms+TO k *(T first-SSB +T SSB-proc ).

[0244] In the above example, the TCI status is known if the following conditions have been met:

[0245] - TCI state switch is within 1280ms of the last transmission of resources used for beam reporting / measurements for the target TCI state - UE has sent at least 1 measurement report for the target TCI state

[0246] - During the TCI state switching period, the TCI state should remain detectable

[0247] -SNR in TCI state>-3dB.

[0248] According to certain embodiments, a method performed by a network node is also provided. The method is as suggested above in the description of the network node (e.g., a wireless device). In addition, the network node (e.g., PCell) can calculate the time required for the wireless device (such as, for example, UE) to complete the cell configuration process (including determining whether the cell is known or unknown) based on the above embodiments. The network node can also use the calculated time to determine whether the cell configuration is successfully completed. If not, the network node can resend the cell configuration process; if so, the network node can perform one or more operational tasks involving the configured cell (assuming that the cell configuration process is successfully completed), for example, scheduling DL or UL transmissions to the UE in the configured cell.

[0249] In another example, the network node determines when the UE may create an outage on the serving cell, wherein the outage is associated with a cell (re) configuration procedure and is controlled in time by the UE adapted to the CCA result. When determining the time (e.g., time window) when the UE may have an outage, the network may adapt its scheduling, e.g., to avoid configuring the UE to transmit and / or receive critical signals / channels / messages / data because the UE cannot receive or transmit during the outage time.

[0250] Figure 2A wireless network according to some embodiments is shown. Although the subject matter described herein may be implemented in any suitable type of system using any suitable components, reference to a wireless network (such as Figure 2 The embodiments disclosed herein are described with reference to the example wireless network illustrated in FIG. Figure 2 The wireless network of FIG. 1 depicts only the network 106, the network nodes 160 and 160b, and the wireless devices 110, 110b, and 110c. In practice, the wireless network may further include any additional elements suitable for supporting communication between wireless devices or between a wireless device and another communication device (such as a landline, a service provider, or any other network node or terminal device). In the illustrated components, the network node 160 and the wireless device 110 are depicted with additional details. The wireless network may provide communication and other types of services to one or more wireless devices to facilitate the wireless devices to access and / or use services provided by or via the wireless network.

[0251] A wireless network may include and / or interface with any type of communication, telecommunication, data, cellular and / or radio network or other similar type of system. In some embodiments, a wireless network may be configured to operate according to a specific standard or other type of predefined rules or procedures. Thus, a specific embodiment of a wireless network may implement a communication standard such as a global system for mobile communications (GSM), a universal mobile telecommunications system (UMTS), a long term evolution (LTE), and / or other suitable 2G, 3G, 4G or 5G standard; a wireless local area network (WLAN) standard such as an IEEE 802.11 standard; and / or any other suitable wireless communication standard such as a worldwide interoperability for microwave access (WiMax), Bluetooth, Z-Wave and / or ZigBee standard.

[0252] The network 106 may include one or more backhaul networks, core networks, IP networks, public switched telephone networks (PSTN), packet data networks, optical networks, wide area networks (WANs), local area networks (LANs), wireless local area networks (WLANs), wired networks, wireless networks, metropolitan area networks, and other networks that enable communications between devices.

[0253] The network node 160 and the wireless device 110 include various components described in more detail below. These components work together to provide network node and / or wireless device functionality, such as providing wireless connectivity in a wireless network. In various embodiments, a wireless network may include any number of wired or wireless networks, network nodes, base stations, controllers, wireless devices, relay stations, and / or any other components or systems that may facilitate or participate in the communication of data and / or signals (whether via a wired or wireless connection).

[0254] Figure 3 An example network node 160 according to certain embodiments is shown. As used herein, a network node refers to a device that is capable of, configured to, arranged to, and / or operable to communicate directly or indirectly with a wireless device and / or with other network nodes or devices in a wireless network to implement and / or provide wireless access to the wireless device and / or perform other functions (e.g., management) in the wireless network. Examples of network nodes include, but are not limited to, access points (APs) (e.g., radio access points), base stations (BSs) (e.g., radio base stations, Node Bs, evolved Node Bs (eNBs), and NR NodeBs (gNBs)). Base stations can be classified based on the amount of coverage they provide (or, in other words, their transmission power levels) and can then also be referred to as femto base stations, pico base stations, micro base stations, or macro base stations. A base station can be a relay node or a relay donor node that controls a relay. A network node may also include one or more (or all) parts of a distributed radio base station, such as a centralized digital unit and / or a remote radio unit (RRU), which is sometimes referred to as a remote radio head (RRH). Such a remote radio unit may or may not be integrated with an antenna as an antenna-integrated radio device. Portions of distributed radio base stations may also be referred to as nodes in a distributed antenna system (DAS). Yet further examples of network nodes include multi-standard radio (MSR) equipment (such as an MSR BS), a network controller (such as a radio network controller (RNC) or a base station controller (BSC)), a base transceiver station (BTS), a transmission point, a transmission node, a multi-cell / multicast coordination entity (MCE), a core network node (e.g., MSC, MME), an O&M node, an OSS node, a SON node, a positioning node (e.g., E-SMLC), and / or an MDT. As another example, a network node may be a virtual network node, as described in more detail below. However, more generally, a network node may represent any suitable device (or group of devices) that is capable of, configured to, arranged to, and / or operable to enable and / or provide access to a wireless network for a wireless device or to provide a certain service to a wireless device that has access to a wireless network.

[0255] exist Figure 3 In FIG. 1 , the network node 160 includes a processing circuit 170, a device readable medium 180, an interface 190, an auxiliary device 184, a power supply 186, a power supply circuit 187, and an antenna 162. Figure 3The network node 160 illustrated in the example wireless network of can represent a device including the illustrated combination of hardware components, but other embodiments can include network nodes with different combinations of components. It is to be understood that the network node includes any suitable combination of hardware and / or software required to perform the tasks, features, functions, and methods disclosed herein. In addition, although the components of the network node 160 are depicted as a single box nested within multiple boxes or located within a larger box, in reality, the network node may include multiple different physical components that make up a single illustrated component (for example, the device readable medium 180 may include multiple separate hard drives and multiple RAM modules).

[0256] Similarly, the network node 160 may be composed of multiple physically separated components (e.g., NodeB components and RNC components, or BTS components and BSC components, etc.), each of which may have its own corresponding components. In certain scenarios where the network node 160 includes multiple individual components (e.g., BTS and BSC components), one or more of the individual components may be shared between several network nodes. For example, a single RNC may control multiple NodeBs. In such a scenario, each unique NodeB and RNC pair may be considered a single individual network node in some instances. In some embodiments, the network node 160 may be configured to support multiple radio access technologies (RATs). In such an embodiment, some components may be repeated (e.g., separate device readable media 180 for different RATs) and some components may be reused (e.g., the same antenna 162 may be shared by RATs). The network node 160 may also include multiple sets of various illustrated components for different wireless technologies (such as, for example, GSM, WCDMA, LTE, NR, WiFi, or Bluetooth wireless technologies) integrated into the network node 160. These wireless technologies may be integrated into the same or different chips or chipsets and other components within the network node 160 .

[0257] The processing circuit 170 is configured to perform any determination, calculation, or similar operation (e.g., certain obtaining operations) described herein as being provided by the network node. These operations performed by the processing circuit 170 may include processing information obtained by the processing circuit 170 by, for example, converting the obtained information to other information, comparing the obtained information or the converted information to information stored in the network node, and / or performing one or more operations based on the obtained information or the converted information, and making determinations as a result of the processing.

[0258] The processing circuitry 170 may include a combination of one or more of a microprocessor, a controller, a microcontroller, a central processing unit, a digital signal processor, an application specific integrated circuit, a field programmable gate array, or any other suitable computing device, resource, or combination of hardware, software, and / or encoded logic operable to provide network node 160 functionality alone or in conjunction with other network node 160 components (such as device readable medium 180). For example, the processing circuitry 170 may execute instructions stored in the device readable medium 180 or in a memory within the processing circuitry 170. Such functionality may include providing any of the various wireless features, functions, or benefits discussed herein. In some embodiments, the processing circuitry 170 may include a system on a chip (SOC).

[0259] In some embodiments, processing circuitry 170 may include one or more of radio frequency (RF) transceiver circuitry 172 and baseband processing circuitry 174. In some embodiments, radio frequency (RF) transceiver circuitry 172 and baseband processing circuitry 174 may be on separate chips (or chipsets), boards, or units (such as a radio unit and a digital unit). In alternative embodiments, some or all of RF transceiver circuitry 172 and baseband processing circuitry 174 may be on the same chip or chipset, board, or unit.

[0260] In certain embodiments, some or all of the functionality described herein as being provided by a network node, base station, eNB, or other such network device may be performed by a processing circuit 170 executing instructions stored on a device-readable medium 180 or a memory within the processing circuit 170. In alternative embodiments, some or all of the functionality may be provided by the processing circuit 170 without executing instructions stored on a separate or discrete device-readable medium (such as in a hardwired manner). In any of those embodiments, the processing circuit 170 may be configured to perform the described functionality, whether or not executing instructions stored on a device-readable storage medium. The benefits provided by such functionality are not limited to only the processing circuit 170 or other components of the network node 160, but are enjoyed by the network node 160 as a whole and / or by end users and wireless networks generally.

[0261] Device-readable medium 180 may include any form of volatile or non-volatile computer-readable memory, including without limitation: permanent storage, solid-state memory, remotely mounted memory, magnetic media, optical media, random access memory (RAM), read-only memory (ROM), mass storage media (e.g., hard disk), removable storage media (e.g., flash drive, compact disk (CD) or digital video disk (DVD)), and / or any other volatile or non-volatile, non-transitory device-readable and / or computer-executable memory device that stores information, data and / or instructions that may be used by processing circuit 170. Device-readable medium 180 may store any suitable instructions, data or information, including computer programs, software, applications (including one or more of logic, rules, code, tables, etc.) and / or other instructions that are executable by processing circuit 170 and utilized by network node 160. Device-readable medium 180 may be used to store any computations performed by processing circuit 170 and / or any data received via interface 190. In some embodiments, processing circuitry 170 and device readable medium 180 may be considered integrated.

[0262] Interface 190 is used in wired or wireless communication of signaling and / or data between network node 160, network 106 and / or wireless device 110. As shown, interface 190 includes (one or more) ports / (one or more) terminals 194 for sending data to network 106 and receiving data from network 106 via wired connection, for example. Interface 190 also includes radio front-end circuit 192, which can be coupled to antenna 162 or is part of antenna 162 in some embodiments. Radio front-end circuit 192 includes filter 198 and amplifier 196. Radio front-end circuit 192 can be connected to antenna 162 and processing circuit 170. Radio front-end circuit can be configured to adjust the signal transmitted between antenna 162 and processing circuit 170. Radio front-end circuit 192 can receive digital data to be sent to other network nodes or wireless devices via wireless connection. Radio front-end circuit 192 can use a combination of filter 198 and / or amplifier 196 to convert the digital data into a radio signal with suitable channel and bandwidth parameters. The radio signal can then be transmitted via antenna 162. Similarly, when receiving data, antenna 162 may collect radio signals, which are then converted into digital data by radio front end circuitry 192. The digital data may be passed to processing circuitry 170. In other embodiments, the interface may include different components and / or different combinations of components.

[0263] In some alternative embodiments, the network node 160 may not include a separate radio front end circuit 192, but rather the processing circuit 170 may include the radio front end circuit and may be connected to the antenna 162 without a separate radio front end circuit 192. Similarly, in some embodiments, all or some of the RF transceiver circuit 172 may be considered part of the interface 190. In still other embodiments, the interface 190 may include one or more ports or terminals 194, the radio front end circuit 192, and the RF transceiver circuit 172 as part of a radio unit (not shown), and the interface 190 may communicate with the baseband processing circuit 174, which is part of the digital unit (not shown).

[0264] Antenna 162 may include one or more antennas or antenna arrays configured to send and / or receive wireless signals. Antenna 162 may be coupled to radio front-end circuit 190 and may be any type of antenna capable of wirelessly transmitting and receiving data and / or signals. In some embodiments, antenna 162 may include one or more omnidirectional, sector or flat panel antennas operable to transmit / receive radio signals between, for example, 2 GHz and 66 GHz. Omnidirectional antennas may be used to transmit / receive radio signals in any direction, sector antennas may be used to transmit / receive radio signals from a device within a specific area, and flat panel antennas may be line of sight antennas for transmitting / receiving radio signals on a relatively straight line. In some instances, the use of more than one antenna may be referred to as MIMO. In some embodiments, antenna 162 may be separated from network node 160 and may be connected to network node 160 via an interface or port.

[0265] Antenna 162, interface 190 and / or processing circuit 170 can be configured to perform any receiving operation and / or certain obtaining operation described herein as being performed by a network node. Any information, data and / or signal can be received from a wireless device, another network node and / or any other network equipment. Similarly, antenna 162, interface 190 and / or processing circuit 170 can be configured to perform any transmitting operation described herein as being performed by a network node. Any information, data and / or signal can be transmitted to a wireless device, another network node and / or any other network equipment.

[0266] The power circuit 187 may include or be coupled to a power management circuit and is configured to supply power to the components of the network node 160 for performing the functionality described herein. The power circuit 187 may receive power from the power supply 186. The power supply 186 and / or the power circuit 187 may be configured to provide power to the various components of the network node 160 in a form suitable for the respective components (e.g., at the voltage and current levels required by each respective component). The power supply 186 may be included in the power circuit 187 and / or the network node 160 or outside the power circuit 187 and / or the network node 160. For example, the network node 160 may be connected to an external power source (e.g., an electrical socket) via an input circuit or interface such as a cable, whereby the external power source supplies power to the power circuit 187. As another example, the power supply 186 may include a power source in the form of a battery or battery pack connected to the power circuit 187 or integrated in the power circuit 187. If the external power source fails, the battery can provide backup power. Other types of power sources, such as photovoltaic devices, may also be used.

[0267] Alternative embodiments of network node 160 may include Figure 3 160, which may be responsible for providing certain aspects of the functionality of the network node, including any of the functionality described herein and / or any functionality necessary to support the subject matter described herein. For example, the network node 160 may include a user interface device to allow information to be entered into the network node 160 and to allow information to be output from the network node 160. This may allow a user to perform diagnostics, maintenance, repair, and other management functions on the network node 160.

[0268] Figure 4An example wireless device 110 according to certain embodiments is shown. As used herein, a wireless device refers to a device capable of, configured to, arranged to, and / or operable to wirelessly communicate with a network node and / or other wireless devices. Unless otherwise indicated, the term wireless device may be used interchangeably with a user equipment (UE) in this article. Wireless communication may involve transmitting and / or receiving wireless signals using electromagnetic waves, radio waves, infrared waves, and / or other types of signals suitable for conveying information through the air. In some embodiments, the wireless device may be configured to transmit and / or receive information without direct human interaction. For example, the wireless device may be designed to transmit information to the network according to a predetermined schedule, when triggered by an internal or external event, or in response to a request from the network. Examples of wireless devices include, but are not limited to, smartphones, mobile phones, cellular phones, voice over IP (VoIP) phones, wireless local loop phones, desktop computers, personal digital assistants (PDAs), wireless cameras, game consoles or devices, music storage devices, playback devices, wearable terminal devices, wireless endpoints, mobile stations, tablet computers, laptops, laptop embedded equipment (LEE), laptop mounted equipment (LME), smart devices, wireless customer premises equipment (CPE), vehicle mounted wireless terminal devices, etc. The wireless device may support device-to-device (D2D) communication, for example, by implementing 3GPP standards for sidelink communication, vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and vehicle-to-everything (V2X), and in this case may be referred to as a D2D communication device. As another specific example, in an Internet of Things (IoT) scenario, a wireless device may represent a machine or other device that performs monitoring and / or measurement and transmits the results of such monitoring and / or measurement to another wireless device and / or a network node. The wireless device in this case may be a machine-to-machine (M2M) device, which may be referred to as an MTC device in the 3GPP context. As a specific example, the wireless device may be a UE that implements the 3GPP Narrowband Internet of Things (NB-IoT) standard. Specific examples of such machines or devices are sensors, metering devices (such as power meters), industrial machinery, or household or personal equipment (e.g., refrigerators, televisions, etc.), personal wearable devices (e.g., watches, fitness trackers, etc.). In other scenarios, the wireless device may represent a vehicle or other device that is capable of monitoring and / or reporting its operating state or other functions associated with its operation. The wireless device as described above may represent an endpoint of a wireless connection, in which case the device may be referred to as a wireless terminal. In addition, the wireless device as described above may be mobile, in which case it may also be referred to as a mobile device or a mobile terminal.

[0269] As illustrated, the wireless device 110 includes an antenna 111, an interface 114, a processing circuit 120, a device-readable medium 130, a user interface device 132, an auxiliary device 134, a power supply 136, and a power supply circuit 137. The wireless device 110 may include multiple sets of one or more of the illustrated components for different wireless technologies supported by the wireless device 110, such as, for example, GSM, WCDMA, LTE, NR, WiFi, WiMAX, or Bluetooth wireless technologies, to name a few. These wireless technologies may be integrated into the same or different chips or chipsets as other components within the wireless device 110.

[0270] Antenna 111 may include one or more antennas or antenna arrays configured to send and / or receive wireless signals, and is connected to interface 114. In some alternative embodiments, antenna 111 may be separated from wireless device 110 and may be connected to wireless device 110 through an interface or port. Antenna 111, interface 114 and / or processing circuit 120 may be configured to perform any receiving or transmitting operation described herein as being performed by a wireless device. Any information, data and / or signal may be received from a network node and / or another wireless device. In some embodiments, radio front end circuitry and / or antenna 111 may be considered an interface.

[0271] As shown, the interface 114 includes a radio front-end circuit 112 and an antenna 111. The radio front-end circuit 112 includes one or more filters 118 and an amplifier 116. The radio front-end circuit 114 is connected to the antenna 111 and the processing circuit 120 and is configured to condition the signals transmitted between the antenna 111 and the processing circuit 120. The radio front-end circuit 112 may be coupled to the antenna 111 or may be part of the antenna 111. In some embodiments, the wireless device 110 may not include a separate radio front-end circuit 112; instead, the processing circuit 120 may include the radio front-end circuit and may be connected to the antenna 111. Similarly, in some embodiments, some or all of the RF transceiver circuit 122 may be considered part of the interface 114. The radio front-end circuit 112 may receive digital data to be sent to other network nodes or wireless devices via a wireless connection. The radio front-end circuit 112 may convert the digital data into a radio signal having appropriate channel and bandwidth parameters using a combination of filters 118 and / or amplifiers 116. The radio signal may then be transmitted via the antenna 111. Similarly, when receiving data, antenna 111 may collect radio signals, which are then converted into digital data by radio front end circuit 112. The digital data may be passed to processing circuit 120. In other embodiments, the interface may include different components and / or different combinations of components.

[0272] The processing circuit 120 may include a combination of one or more of a microprocessor, a controller, a microcontroller, a central processing unit, a digital signal processor, an application specific integrated circuit, a field programmable gate array, or any other suitable computing device, resource, or combination of hardware, software, and / or encoded logic operable to provide wireless device 110 functionality alone or in conjunction with other wireless device 110 components (such as device readable medium 130). Such functionality may include providing any of the various wireless features or benefits discussed herein. For example, the processing circuit 120 may execute instructions stored in the device readable medium 130 or in a memory within the processing circuit 120 to provide the functionality disclosed herein.

[0273] As shown, the processing circuit 120 includes one or more of the RF transceiver circuit 122, the baseband processing circuit 124, and the application processing circuit 126. In other embodiments, the processing circuit may include different components and / or different combinations of components. In some embodiments, the processing circuit 120 of the wireless device 110 may include a SOC. In some embodiments, the RF transceiver circuit 122, the baseband processing circuit 124, and the application processing circuit 126 may be on a separate chip or chipset. In an alternative embodiment, part or all of the baseband processing circuit 124 and the application processing circuit 126 may be combined into one chip or chipset, and the RF transceiver circuit 122 may be on a separate chip or chipset. In some other alternative embodiments, part or all of the RF transceiver circuit 122 and the baseband processing circuit 124 may be on the same chip or chipset, and the application processing circuit 126 may be on a separate chip or chipset. In some other alternative embodiments, part or all of the RF transceiver circuit 122, the baseband processing circuit 124, and the application processing circuit 126 may be combined in the same chip or chipset. In some embodiments, RF transceiver circuitry 122 may be part of interface 114 . RF transceiver circuitry 122 may condition RF signals for processing circuitry 120 .

[0274] In certain embodiments, some or all of the functionality described herein as being performed by the wireless device may be provided by processing circuitry 120 executing instructions stored on a device-readable medium 130, which in certain embodiments may be a computer-readable storage medium. In alternative embodiments, some or all of the functionality may be provided by processing circuitry 120 without executing instructions stored on a separate or discrete device-readable storage medium (such as in a hardwired manner). In any of those specific embodiments, processing circuitry 120 may be configured to perform the described functionality regardless of whether instructions stored on a device-readable storage medium are executed. The benefits provided by such functionality are not limited to only processing circuitry 120 or other components of wireless device 110, but are enjoyed by wireless device 110 as a whole and / or by end users and wireless networks in general.

[0275] Processing circuitry 120 may be configured to perform any determination, calculation, or similar operation (e.g., certain obtaining operations) described herein as being performed by the wireless device. Such operations as performed by processing circuitry 120 may include processing information obtained by processing circuitry 120 by, for example, converting the obtained information to other information, comparing the obtained information or the converted information to information stored by wireless device 110, and / or performing one or more operations based on the obtained information or the converted information, and making determinations as a result of the processing.

[0276] Device-readable medium 130 may be operable to store computer programs, software, applications (including one or more of logic, rules, code, tables, etc.), and / or other instructions that are executable by processing circuit 120. Device-readable medium 130 may include computer memory (e.g., random access memory (RAM) or read-only memory (ROM)), mass storage media (e.g., hard disk), removable storage media (e.g., compact disk (CD) or digital video disk (DVD)), and / or any other volatile or non-volatile, non-transitory device-readable and / or computer-executable memory device that stores information, data, and / or instructions that may be used by processing circuit 120. In some embodiments, processing circuit 120 and device-readable medium 130 may be considered integrated.

[0277] The user interface device 132 may provide components that allow a human user to interact with the wireless device 110. Such interactions may have many forms, such as visual, auditory, tactile, etc. The user interface device 132 may be operable to generate output to the user and allow the user to provide input to the wireless device 110. The type of interaction may vary depending on the type of user interface device 132 installed in the wireless device 110. For example, if the wireless device 110 is a smart phone, the interaction may be via a touch screen; if the wireless device 110 is a smart meter, the interaction may be through a screen that provides usage (e.g., the number of gallons used) or a speaker that provides an audible alarm (e.g., if smoke is detected). The user interface device 132 may include input interfaces, devices and circuits, and output interfaces, devices and circuits. The user interface device 132 is configured to allow information to be input into the wireless device 110, and is connected to the processing circuit 120 to allow the processing circuit 120 to process the input information. The user interface device 132 may include, for example, a microphone, proximity or other sensor, key / button, touch display, one or more camera devices, USB port or other input circuit. The user interface device 132 is also configured to allow information to be output from the wireless device 110, and to allow the processing circuit 120 to output information from the wireless device 110. The user interface device 132 may include, for example, a speaker, a display, a vibration circuit, a USB port, a headphone interface, or other output circuits. Using one or more input and output interfaces, devices, and circuits of the user interface device 132, the wireless device 110 can communicate with an end user and / or a wireless network, and allow them to benefit from the functionality described herein.

[0278] Auxiliary device 134 is operable to provide more specific functionality that may not generally be performed by a wireless device. This may include specialized sensors for taking measurements for various purposes, interfaces for additional types of communications (such as wired communications), etc. The contents and types of components of auxiliary device 134 may vary depending on the embodiment and / or scenario.

[0279] The power source 136 may take the form of a battery or battery pack in some embodiments. Other types of power sources may also be used, such as an external power source (e.g., an electrical outlet), a photovoltaic device, or a power battery. The wireless device 110 may further include a power circuit 137 for delivering power from the power source 136 to various parts of the wireless device 110, which require power from the power source 136 to perform any functionality described or indicated herein. The power circuit 137 may include a power management circuit in some embodiments. The power circuit 137 may additionally or alternatively be operable to receive power from an external power source; in this case the wireless device 110 may be connectable to an external power source (such as an electrical outlet) via an input circuit or interface (such as a power cable). The power circuit 137 may also be operable in some embodiments to deliver power from an external power source to the power source 136. This may be used, for example, for charging the power source 136. The power circuit 137 may perform any formatting, conversion, or other modification of the power from the power source 136 to make the power suitable for the corresponding components of the wireless device 110 to which the power is supplied.

[0280] Figure 5 One embodiment of a UE in accordance with various aspects described herein is shown. As used herein, a user equipment or UE may not necessarily have a user in the sense of a human user who owns and / or operates the associated device. Alternatively, the UE may represent a device that is intended for sale to or operated by a human user but may not be or may not initially be associated with a particular human user (e.g., a smart sprinkler controller). Alternatively, the UE may represent a device that is not intended for sale to or operated by an end user, but may be associated with or operated for the benefit of a user (e.g., a smart power meter). UE 200 may be any UE identified by the Third Generation Partnership Project (3GPP), including a NB-IoT UE, a Machine Type Communication (MTC) UE, and / or an enhanced MTC (eMTC) UE. As described in Figure 3 UE 200 is an example of a wireless device configured to communicate according to one or more communication standards promulgated by the Third Generation Partnership Project (3GPP), such as 3GPP's GSM, UMTS, LTE and / or 5G standards. As mentioned previously, the terms wireless device and UE may be used interchangeably. Thus, although Figure 5 Although the present invention is a UE, the components discussed herein are equally applicable to a wireless device, and vice versa.

[0281] exist Figure 5In the embodiment, UE 200 includes a processing circuit 201, which is operatively coupled to an input / output interface 205, a radio frequency (RF) interface 209, a network connection interface 211, a memory 215 (including a random access memory (RAM) 217, a read-only memory (ROM) 219, and a storage medium 221, etc.), a communication subsystem 231, a power supply 233, and / or any other components or any combination thereof. The storage medium 221 includes an operating system 223, an application 225, and data 227. In other embodiments, the storage medium 221 may include other similar types of information. Some UEs may utilize Figure 5 All components shown in the UE may be used, or only a subset of the components may be utilized. The level of integration between components may vary from one UE to another UE. In addition, some UEs may contain multiple instances of components, such as multiple processors, memories, transceivers, transmitters, receivers, etc.

[0282] exist Figure 5 , processing circuitry 201 may be configured to process computer instructions and data. Processing circuitry 201 may be configured to implement any sequential state machine that operates to execute machine instructions stored in a memory as a machine-readable computer program, such as one or more hardware-implemented state machines (e.g., in discrete logic, FPGA, ASIC, etc.); programmable logic together with suitable firmware; one or more stored programs, general-purpose processors (such as microprocessors or digital signal processors (DSPs)) together with suitable software; or any combination of the above. For example, processing circuitry 201 may include two central processing units (CPUs). Data may be information in a form suitable for use by a computer.

[0283] In the depicted embodiment, the input / output interface 205 may be configured to provide a communication interface to an input device, an output device, or an input and output device. The UE 200 may be configured to use an output device via the input / output interface 205. The output device may use the same type of interface port as the input device. For example, a USB port may be used to provide input to the UE 200 and output from the UE 200. The output device may be a speaker, a sound card, a video card, a display, a monitor, a printer, an actuator, a transmitter, a smart card, another output device, or any combination thereof. The UE 200 may be configured to use an input device via the input / output interface 205 to allow a user to capture information into the UE 200. The input device may include a touch-sensitive or presence-sensitive display, a camera (e.g., a digital camera, a digital video camera, a web camera, etc.), a microphone, a sensor, a mouse, a trackball, a directional pad, a trackpad, a scroll wheel, a smart card, etc. The presence-sensitive display may include a capacitive or resistive touch sensor to sense input from the user. The sensor can be, for example, an accelerometer, a gyroscope, a tilt sensor, a force sensor, a magnetometer, a light sensor, a proximity sensor, another similar sensor, or any combination thereof. For example, the input device can be an accelerometer, a magnetometer, a digital camera, a microphone, and a light sensor.

[0284] exist Figure 5 In the embodiment of the present invention, the RF interface 209 can be configured to provide a communication interface to RF components such as transmitters, receivers, and antennas. The network connection interface 211 can be configured to provide a communication interface to the network 243a. The network 243a can include a wired and / or wireless network, such as a local area network (LAN), a wide area network (WAN), a computer network, a wireless network, a telecommunications network, another similar network, or any combination thereof. For example, the network 243a can include a Wi-Fi network. The network connection interface 211 can be configured to include a receiver and a transmitter interface for communicating with one or more other devices through a communication network according to one or more communication protocols (such as Ethernet, TCP / IP, SONET, ATM, etc.). The network connection interface 211 can implement receiver and transmitter functionality suitable for communication network links (e.g., optical, electrical, etc.). The transmitter and receiver functions can share circuit components, software, or firmware, or alternatively can be implemented separately.

[0285] RAM 217 can be configured to be connected to processing circuit 201 via bus 202 by interface to provide storage or cache of data or computer instructions during the execution of software programs such as operating system, application program and device driver. ROM 219 can be configured to provide computer instructions or data to processing circuit 201. For example, ROM 219 can be configured to store unchanged low-level system code or data for basic system functions (such as basic input and output (I / O), startup or receiving keystrokes from keyboard), which is stored in non-volatile memory. Storage medium 221 can be configured to include memory, such as RAM, ROM, programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), disk, optical disk, floppy disk, hard disk, removable cartridge disk or flash drive. In one example, storage medium 221 can be configured to include operating system 223, application program 225 (such as web browser application, widget or gadget engine or another application) and data file 227. Storage medium 221 may store any of a variety of operating systems or combinations of operating systems for use by UE 200 .

[0286] The storage medium 221 may be configured to include many physical drive units, such as a redundant array of independent disks (RAID), a floppy disk drive, a flash memory, a USB flash drive, an external hard drive, a thumb drive, a pen drive, a key drive, a high-density digital versatile disk (HD-DVD) optical drive, an internal hard drive, a Blu-ray optical drive, a holographic digital data storage (HDDS) optical drive, an external mini dual in-line memory module (DIMM), a synchronous dynamic random access memory (SDRAM), an external micro DIMM SDRAM, a smart card memory (such as a subscriber identity module or a removable user identity (SIM / RUIM)) module, other memory or any combination thereof. The storage medium 221 may allow the UE 200 to access computer executable instructions, applications, etc. stored on a temporary or non-temporary memory medium to unload data or upload data. An article (such as an article utilizing a communication system) may be tangibly embodied in the storage medium 221, which may include a device-readable medium.

[0287] exist Figure 5In the embodiment, the processing circuit 201 can be configured to communicate with the network 243b using the communication subsystem 231. The network 243a and the network 243b can be the same one or more networks or different one or more networks. The communication subsystem 231 can be configured to include one or more transceivers for communicating with the network 243b. For example, the communication subsystem 231 can be configured to include one or more transceivers, and the one or more transceivers are used to communicate with one or more remote transceivers of another device capable of wireless communication (such as another wireless device, UE or base station of a radio access network (RAN)) according to one or more communication protocols (such as IEEE802.2, code division multiple access (CDMA), wide code division multiple access (WCDMA), global satellite management (GSM), long term evolution (LTE), universal terrestrial radio access network (UTRAN), WiMax, etc.). Each transceiver may include a transmitter 233 and / or a receiver 235 to respectively implement the transmitter or receiver functionality (e.g., frequency allocation, etc.) suitable for the RAN link. Furthermore, the transmitter 233 and receiver 235 of each transceiver may share circuit components, software, or firmware, or alternatively may be implemented separately.

[0288] In the illustrated embodiment, the communication functions of the communication subsystem 231 may include data communication, voice communication, multimedia communication, short-range communication (such as Bluetooth, near-field communication), location-based communication (such as using a global positioning system (GPS) to determine location), another similar communication function, or any combination thereof. For example, the communication subsystem 231 may include cellular communication, Wi-Fi communication, Bluetooth communication, and GPS communication. The network 243b may include a wired and / or wireless network, such as a local area network (LAN), a wide area network (WAN), a computer network, a wireless network, a telecommunications network, another similar network, or any combination thereof. For example, the network 243b may be a cellular network, a Wi-Fi network, and / or a near-field network. The power supply 213 may be configured to provide alternating current (AC) or direct current (DC) power to the components of the UE 200.

[0289] The features, benefits and / or functions described herein may be implemented in one of the components of UE 200, or may be divided across multiple components of UE 200. In addition, the features, benefits and / or functions described herein may be implemented in any combination of hardware, software or firmware. In one example, the communication subsystem 231 may be configured to include any of the components described herein. In addition, the processing circuit 201 may be configured to communicate with any of such components via the bus 202. In another example, any of such components may be represented by program instructions stored in a memory, which perform the corresponding functions described herein when executed by the processing circuit 201. In another example, the functionality of any of such components may be divided between the processing circuit 201 and the communication subsystem 231. In another example, the non-computationally intensive functions of any of such components may be implemented in software or firmware and the computationally intensive functions may be implemented in hardware.

[0290] Figure 6 300 in which the functions implemented by some embodiments may be virtualized. In this context, virtualization means creating a virtual version of a device or apparatus, which may include virtualized hardware platforms, storage devices, and networking resources. As used herein, virtualization may be applied to a node (e.g., a virtualized base station or a virtualized radio access node) or to a device (e.g., a UE, a wireless device, or any other type of communication device) or a component thereof, and involves an implementation in which at least a portion of the functionality is implemented as one or more virtual components (e.g., via one or more applications, components, functions, virtual machines, or containers executed on one or more physical processing nodes in one or more networks).

[0291] In some embodiments, some or all of the functionality described herein may be implemented as virtual components executed by one or more virtual machines implemented in one or more virtual environments 300 hosted by one or more of the hardware nodes 330. Furthermore, in embodiments where the virtual nodes are not radio access nodes or do not require radio connectivity (e.g., core network nodes), then the network nodes may be fully virtualized.

[0292] Functionality may be implemented by one or more applications 320 (which may alternatively be referred to as software instances, virtual appliances, network functions, virtual nodes, virtual network functions, etc.) that operate to implement some of the features, functions, and / or benefits of some of the embodiments disclosed herein. Applications 320 run in a virtualized environment 300 that provides hardware 330 including processing circuitry 360 and memory 390. Memory 390 contains instructions 395 executable by processing circuitry 360, whereby applications 320 operate to provide one or more of the features, benefits, and / or functionality disclosed herein.

[0293] The virtualized environment 300 includes a general or dedicated network hardware device 330, which includes a set of one or more processors or processing circuits 360, which can be commercial off-the-shelf (COTS) processors, specialized application-specific integrated circuits (ASICs), or any other type of processing circuits, including digital or analog hardware components or dedicated processors. Each hardware device may include a memory 390-1, which may be a non-permanent memory for temporarily storing instructions 395 or software executed by the processing circuit 360. Each hardware device may include one or more network interface controllers (NICs) 370 (also known as network interface cards), which include a physical network interface 380. Each hardware device may also include a non-transitory, permanent machine-readable storage medium 390-2 in which software 395 and / or instructions executable by the processing circuit 360 are stored. The software 395 may include any type of software, including software for instantiating one or more virtualization layers 350 (also known as hypervisors), software for executing virtual machines 340, and software that allows it to perform the functions, features, and / or benefits described with respect to some embodiments described herein.

[0294] The virtual machines 340 include virtual processing, virtual memory, virtual networking or interfaces, and virtual storage, and may be run by a corresponding virtualization layer 350 or hypervisor. Different embodiments of instances of the virtual devices 320 may be implemented on one or more of the virtual machines 340, and may be implemented in different ways.

[0295] During operation, processing circuitry 360 executes software 395 to instantiate a hypervisor or virtualization layer 350, which may sometimes be referred to as a virtual machine monitor (VMM). Virtualization layer 350 may present to virtual machines 340 a virtual operating platform that appears to be networked hardware.

[0296] As in Figure 6, hardware 330 may be a standalone network node with common or specific components. Hardware 330 may include antenna 3225 and may implement some functions via virtualization. Alternatively, hardware 330 may be part of a larger hardware cluster (e.g., such as in a data center or customer premises equipment (CPE)) where many hardware nodes work together and are managed via management and orchestration (MANO) 3100, which, among other things, oversees life cycle management of application 320.

[0297] Virtualization of hardware is referred to in some contexts as network function virtualization (NFV). NFV can be used to consolidate many network equipment types onto industry-standard high-volume server hardware, physical switches, and physical storage devices (which can be located in data centers and customer premises equipment).

[0298] In the context of NFV, a virtual machine 340 may be a software implementation of a physical machine that runs programs as if they were executed on a physical, non-virtual machine. Each of the virtual machines 340 and the portion of the hardware 330 on which it executes (whether it is hardware dedicated to the virtual machine and / or hardware shared by the virtual machine with other virtual machines 340) forms a separate virtual network element (VNE).

[0299] Still in the context of NFV, a virtual network function (VNF) is responsible for handling specific network functions running in one or more virtual machines 340 on top of the hardware networking infrastructure 330 and corresponds to Figure 6 Application 320.

[0300] In some embodiments, one or more radio units 3200, each including one or more transmitters 3220 and one or more receivers 3210, may be coupled to one or more antennas 3225. The radio units 3200 may communicate directly with the hardware nodes 330 via one or more suitable network interfaces and may be used in conjunction with virtual components to provide a virtual node with radio capabilities, such as a radio access node or base station.

[0301] In some embodiments, some signaling may be affected with the aid of a control system 3230 , which may alternatively be used for communication between the hardware node 330 and the radio unit 3200 .

[0302] Figure 7A method 1000 performed by a wireless device 110 in accordance with certain embodiments is depicted. At step 1002, the wireless device 110 determines whether a cell associated with a clear channel assessment (CCA) failure is known or unknown. At step 1004, the wireless device 110 selects a process for configuring a cell associated with a CCA failure based on determining whether the cell is known or unknown. At step 1006, the wireless device 110 performs a process for configuring a cell associated with a CCA failure.

[0303] Figure 8 A wireless network (eg, Figure 2 1. A schematic block diagram of a virtual device 1100 in a wireless network (such as a wireless network shown in FIG. 1 ). The device may be in a wireless device or a network node (such as a wireless network such ... Figure 2 The apparatus 1100 may be implemented in a wireless device 110 or a network node 160 as shown in FIG. Figure 7 The example methods described and possibly any other processes or methods disclosed herein. It will also be understood that Figure 7 The method is not necessarily performed only by the device 1100. At least some operations of the method may be performed by one or more other entities.

[0304] The virtual device 1100 may include a processing circuit, which may include one or more microprocessors or microcontrollers, and other digital hardware, which may include a digital signal processor (DSP), dedicated digital logic, etc. The processing circuit may be configured to execute program codes stored in a memory, which may include one or more types of memory, such as a read-only memory (ROM), a random access memory, a cache memory, a flash memory device, an optical storage device, etc. In several embodiments, the program code stored in the memory includes program instructions for executing one or more telecommunications and / or data communication protocols and instructions for implementing one or more of the techniques described herein. In some implementations, the processing circuit may be used to cause the determination module 1110, the selection module 1120, the execution module 1130, and any other suitable unit of the device 1100 to perform corresponding functions according to one or more embodiments of the present disclosure.

[0305] According to some embodiments, the determination module 1110 may perform certain determination functions of the device 1100. For example, the determination module 1110 may determine whether a cell associated with a clear channel assessment (CCA) failure is known or unknown.

[0306] According to certain embodiments, the selection module 1120 may perform certain selection functions of the device 1100. For example, the selection module 1120 may select a process for configuring a cell associated with a CCA failure based on determining whether the cell is known or unknown.

[0307] According to some embodiments, the execution module 1130 may execute certain execution functions of the device 1100. For example, the execution module 1130 may execute a process for configuring a cell associated with a CCA failure.

[0308] The term unit may have its conventional meaning in the field of electronics, electrical devices and / or electronic devices, and may include, for example, electrical and / or electronic circuits, devices, modules, processors, memories, logical solid-state and / or discrete devices, computer programs or instructions for performing corresponding tasks, processes, calculations, outputs, and / or display functions, etc., such as those described herein.

[0309] Fig. 9 A method 1200 performed by a network node 160 according to certain embodiments is depicted. At step 1202, the network node 160 detects a CCA failure. At step 1204, the network node 160 determines whether a cell associated with the CCA failure is known or unknown. At step 1206, the network node 160 selects a process for configuring a cell associated with the CCA failure based on determining whether the cell is known or unknown. At step 1208, the network node 160 transmits information associated with the process to a wireless device for performing the process.

[0310] Fig.10 A wireless network (e.g., Figure 2 1300 in a wireless network). The device can be in a wireless device or a network node (e.g., Figure 2 The apparatus 1300 may be implemented in the wireless device 110 or the network node 160 shown in FIG. Fig. 9 The example methods described and possibly any other processes or methods disclosed herein. It will also be understood that Fig. 9 The method is not necessarily performed only by the device 1300. At least some operations of the method may be performed by one or more other entities.

[0311] The virtual device 1300 may include a processing circuit, which may include one or more microprocessors or microcontrollers, and other digital hardware, which may include a digital signal processor (DSP), dedicated digital logic, etc. The processing circuit may be configured to execute program code stored in a memory, which may include one or more types of memory, such as a read-only memory (ROM), a random access memory, a cache memory, a flash memory device, an optical storage device, etc. In several embodiments, the program code stored in the memory includes program instructions for executing one or more telecommunications and / or data communication protocols and instructions for implementing one or more of the techniques described herein. In some implementations, the processing circuit may be used to cause the detection module 1310, the determination module 1320, the selection module 1330, and the transmission module 1340, and any other suitable unit of the device 1300 to perform corresponding functions according to one or more embodiments of the present disclosure.

[0312] According to some embodiments, the detection module 1310 may perform certain detection functions of the device 1300. For example, the detection module 1310 may detect a CCA failure.

[0313] According to some embodiments, the determination module 1320 may perform certain determination functions of the device 1300. For example, the determination module 1320 may determine whether the cell associated with the CCA failure is known or unknown.

[0314] According to certain embodiments, the selection module 1330 may perform certain selection functions of the device 1300. For example, the selection module 1330 may select a process for configuring a cell associated with a CCA failure based on determining whether the cell is known or unknown.

[0315] According to some embodiments, the transmission module 1320 may perform certain transmission functions of the apparatus 1300. For example, the transmission module 1320 may transmit information associated with the process to the wireless device for performing the process.

[0316] The term unit may have its conventional meaning in the field of electronics, electrical devices and / or electronic devices, and may include, for example, electrical and / or electronic circuits, devices, modules, processors, memories, logical solid-state and / or discrete devices, computer programs or instructions for performing corresponding tasks, processes, calculations, outputs, and / or display functions, etc., such as those described herein.

[0317] Fig.11A method 1400 performed by a wireless device 110 according to certain embodiments is depicted. At step 1402, the wireless device 110 receives a command associated with a process for establishing or releasing a cell or signal from a network node 160. At step 1404, the wireless device 110 detects one or more CCA failures on an uplink signal while transmitting HARQ feedback associated with the process for establishing or releasing a cell or signal. At step 1406, the wireless device 110 extends a transmission period for transmitting HARQ feedback associated with the process for establishing or releasing a cell or signal based on the one or more CCA failures.

[0318] According to certain embodiments, a transmission period comprises a time span for transmitting and / or attempting to transmit HARQ feedback. A transmission period may comprise one or more attempts.

[0319] In particular embodiments, extending the time period duration for transmitting the HARQ feedback includes extending the time period duration based on a number of times the wireless device 110 was unable to send the HARQ feedback due to one or more CCA failures.

[0320] In certain embodiments, extending the transmission period for transmitting HARQ feedback includes increasing a maximum number of times the wireless device 110 is allowed to fail to send HARQ feedback due to one or more CCA failures.

[0321] In certain embodiments, extending a transmission period for transmitting HARQ feedback includes adapting a start time instance of an interruption period caused by the process.

[0322] In certain embodiments, the HARQ feedback includes a HARQ ACK or a HARQ NAK.

[0323] In certain embodiments, the HARQ feedback includes measurement reports.

[0324] In a particular embodiment, the process for establishing or releasing a cell or signal includes a process for at least one of: establishing or releasing a serving cell; configuring or reconfiguring a SpCell; activating or deactivating a PSCell; activating or deactivating a SCell; switching the TCI of a beam; and updating an active TCI status list.

[0325] In certain embodiments, detecting one or more CCA failures on the uplink signal includes determining that HARQ feedback was not successfully sent to the network node 160 during a time duration prior to triggering the process for establishing or releasing the cell or signal. In certain embodiments, extending a transmission period for transmitting HARQ feedback associated with the process includes selecting an amount of time for performing the process based on that HARQ feedback was not successfully sent to the network node during a time duration prior to triggering the process.

[0326] In another particular embodiment, the amount of time is selected from a plurality of durations based on a type of one or more CCA failures. Each of the plurality of durations is associated with a respective type of CCA failure.

[0327] In particular embodiments, the amount of time is an actual reporting delay associated with one or more CCA failures or a maximum acceptable reporting delay for one or more CCA failures.

[0328] In certain embodiments, the amount of time is selected based on the actual number of transmission attempts for HARQ feedback.

[0329] In certain embodiments, the process for establishing or releasing a cell or signal includes transmitting a PRACH preamble to the cell.

[0330] In certain embodiments, the process for establishing or releasing a cell or signal includes transmitting a CSI report.

[0331] In a particular embodiment, the wireless device 110 detects an event that triggers a process for establishing or releasing a cell or signal. In another particular embodiment, detecting the event includes receiving a command from the network node 160.

[0332] In a particular embodiment, when performing a procedure for establishing or releasing a cell or signal, the wireless device 110 determines a CCA impact of performing the procedure and compares the CCA impact to at least one threshold. A CCA failure is associated with one of a plurality of types of CCA failures, and a respective one of a plurality of thresholds is associated with each type of CCA failure in the plurality of types of CCA failures. In another particular embodiment, if the CCA impact of performing the procedure is equal to or less than the at least one threshold, the wireless device 110 completes the procedure, or if the CCA impact of performing the procedure is greater than the at least one threshold, the wireless device 110 stops the procedure. In another particular embodiment, if the CCA impact of performing the procedure is equal to or greater than the at least one threshold, the wireless device 110 restarts at least a portion of the procedure.

[0333] In another particular embodiment, the wireless device 110 counts the number of times at least a portion of the process has been restarted and discards the process if the number is greater than a threshold.

[0334] In certain embodiments, the wireless device 110 maintains a timer and discards the process or a portion of the process if the timer expires.

[0335] In a particular embodiment, the cell is a PSCell.

[0336] Fig.12 A wireless network (e.g., Figure 21500 in a wireless network (e.g., a wireless network). The device may be in a wireless device or a network node (e.g., Figure 2 The apparatus 1500 may be implemented in the wireless device 110 or the network node 160 shown in FIG. Fig.11 The example method 1400 described and possibly any other process or method disclosed herein. It will also be understood that Fig.11 The method 1400 is not necessarily performed only by the device 1500. At least some operations of the method may be performed by one or more other entities.

[0337] The virtual device 1500 may include a processing circuit, which may include one or more microprocessors or microcontrollers, and other digital hardware, which may include a digital signal processor (DSP), dedicated digital logic, etc. The processing circuit may be configured to execute program codes stored in a memory, which may include one or more types of memory, such as a read-only memory (ROM), a random access memory, a cache memory, a flash memory device, an optical storage device, etc. In several embodiments, the program code stored in the memory includes program instructions for executing one or more telecommunications and / or data communication protocols and instructions for implementing one or more of the techniques described herein. In some implementations, the processing circuit may be used to cause the receiving module 1510, the detection module 1520, the extension module 1530, and any other suitable unit of the device 1500 to perform corresponding functions according to one or more embodiments of the present disclosure.

[0338] According to certain embodiments, the receiving module 1510 may perform certain receiving functions of the device 1500. For example, the receiving module 1510 may receive a command from the network node 160 associated with a procedure for establishing or releasing a cell or signal.

[0339] According to certain embodiments, detection module 1520 may perform certain detection functions of device 1500. For example, detection module 1520 may detect one or more CCA failures on an uplink signal when transmitting HARQ feedback associated with a process for establishing or releasing a cell or signal.

[0340] According to certain embodiments, the extension module 1530 may perform certain extension functions of the device 1500. For example, the extension module 1530 may extend a transmission period for transmitting HARQ feedback associated with a process for establishing or releasing a cell or signal based on one or more CCA failures.

[0341] The term unit may have its conventional meaning in the field of electronics, electrical devices and / or electronic devices, and may include, for example, electrical and / or electronic circuits, devices, modules, processors, memories, logical solid-state and / or discrete devices, computer programs or instructions for performing corresponding tasks, processes, calculations, outputs, and / or display functions, etc., such as those described herein.

[0342] Fig.13 Another method 1600 performed by the wireless device 110 in accordance with certain embodiments is depicted. At step 1602, the wireless device 110 detects a CCA failure while performing a process for establishing or releasing a cell or signal. At step 1604, the wireless device 110 determines an outage window during which the wireless device 110 cannot transmit or receive due to the CCA failure.

[0343] In a particular embodiment, the blackout window includes the amount of time that the wireless device cannot transmit or receive due to a CCA failure.

[0344] In certain embodiments, determining the blackout window includes determining at least one of a lower time boundary and an upper time boundary of the blackout window.

[0345] In particular embodiments, wireless device 110 determines that the blackout window does not occur outside of an allowed blackout window.

[0346] In certain embodiments, determining the blackout window includes determining at least one of a start time and an end time of the blackout window.

[0347] In certain embodiments, determining the blackout window includes determining at least one of a start time slot and an end time slot of the blackout window.

[0348] In a specific embodiment, determining the interruption window includes adjusting the start time of the interruption window, which increases at least as the number of times the wireless device cannot send the feedback signal due to CCA failure. In another specific embodiment, the feedback signal includes at least one of the following items: HARQ feedback, CQI report, and L1-RSRP report. In another specific embodiment, the feedback signal includes HARQ feedback, and the wireless device 110 determines that the number of times the wireless device 110 cannot send HARQ feedback exceeds a threshold. The wireless device performs at least one action to not cause any more interruptions. The at least one action includes abandoning the process and / or restarting the process, the wireless device 110 sends HARQ feedback due to abandoning the process, and the wireless device 110 sends HARQ feedback due to restarting the process.

[0349] Fig.14 A wireless network (e.g., Figure 21700 in a wireless network (e.g., a wireless network). The device may be in a wireless device or a network node (e.g., Figure 2 The apparatus 1700 may be implemented in the wireless device 110 or the network node 160 shown in FIG. Fig.13 The example method 1600 described and possibly any other process or method disclosed herein. It will also be understood that Fig.13 The method 1600 is not necessarily performed only by the device 1700. At least some operations of the method may be performed by one or more other entities.

[0350] The virtual device 1700 may include a processing circuit, which may include one or more microprocessors or microcontrollers, and other digital hardware, which may include a digital signal processor (DSP), dedicated digital logic, etc. The processing circuit may be configured to execute program codes stored in a memory, which may include one or more types of memory, such as a read-only memory (ROM), a random access memory, a cache memory, a flash memory device, an optical storage device, etc. In several embodiments, the program code stored in the memory includes program instructions for executing one or more telecommunications and / or data communication protocols and instructions for implementing one or more of the techniques described herein. In some implementations, the processing circuit may be used to cause the detection module 1710, the determination module 1720, and any other suitable unit of the device 1700 to perform corresponding functions according to one or more embodiments of the present disclosure.

[0351] According to some embodiments, the detection module 1710 may perform certain detection functions of the device 1700. For example, when performing a process for establishing or releasing a cell or a signal, the detection module 1710 may detect a CCA failure.

[0352] According to certain embodiments, the determination module 1720 may perform certain determination functions of the apparatus 1700. For example, the determination module 1720 may determine an outage window during which the wireless device 110 cannot transmit or receive due to a CCA failure.

[0353] The term unit may have its conventional meaning in the field of electronics, electrical devices and / or electronic devices, and may include, for example, electrical and / or electronic circuits, devices, modules, processors, memories, logical solid-state and / or discrete devices, computer programs or instructions for performing corresponding tasks, processes, calculations, outputs, and / or display functions, etc., such as those described herein.

[0354] Example Embodiments

[0355] Example embodiment 1. A method performed by a wireless device, the method comprising: determining whether a cell associated with a clear channel assessment (CCA) failure is known or unknown; selecting a process for configuring the cell associated with the CCA failure based on determining whether the cell is known or unknown; and executing the process for configuring the cell associated with the CCA failure.

[0356] Example embodiment 2. The method as described in Example embodiment 1, wherein the CCA failure is a downlink CCA failure.

[0357] Example embodiment 3. The method as described in Example embodiment 1, wherein the CCA failure is an uplink CCA failure.

[0358] Example embodiment 4. A method as described in any one of Example embodiments 1 to 3, wherein the process is used for at least one of the following items: activating or adding a primary secondary cell (PSCell); activating or adding a secondary cell (SCell); transmission configuration indication (TCI) state switching; and updating an active TCI state list.

[0359] Example embodiment 5. The method as described in any one of Example embodiments 1 to 4 further includes determining whether at least one report has been sent to a network node during a duration before triggering the process, and wherein: if the at least one report has been sent to the network node during the duration before triggering the process, it is determined that the cell is known; and if the at least one report has not been sent to the network node during the duration before triggering the process, it is determined that the cell is unknown.

[0360] Example embodiment 6. The method of example embodiment 5, wherein the duration is selected from a plurality of durations, each duration of the plurality of durations being associated with a respective type of CCA failure.

[0361] Example embodiment 7. The method of any of example embodiments 5 to 6, wherein the duration is extended by an additional amount of time to compensate for the CCA failure.

[0362] Example embodiment 8. The method of any one of example embodiments 5 to 7, further comprising extending the duration by an additional amount of time to provide additional time for the CCA failure.

[0363] Example embodiment 9. The method of any one of example embodiments 7 to 8, wherein the additional amount of time is an actual reporting delay associated with the CCA failure or a maximum acceptable reporting delay for the CCA failure.

[0364] Example embodiment 10. A method as described in any of Example embodiments 7 to 9, wherein the additional time amount is selected based on at least one of the following items: the configuration of the measured downlink signal (such as periodicity, density, bandwidth, DRX cycle length, SINR, frequency range, DTX cycle length, etc.); the configuration of the transmitted uplink signal (such as periodicity, density, bandwidth, DRX cycle length, SINR, frequency range, DTX cycle length, etc.); the actual number of downlink or uplink transmission attempts.

[0365] Example Embodiment 11. The method of any one of Example Embodiments 5 to 10, further comprising determining that at least one SSB measured from the cell remains detectable during the duration.

[0366] Example embodiment 12. The method as described in any of Example embodiments 5 to 11 also includes determining that at least one SSB measured from the cell remains detectable based on at least one cell identification condition when the SSB is available at the wireless device (for example, not lost due to the failure of the CCA).

[0367] Example Embodiment 13. The method of any one of Example Embodiments 5 to 12, wherein the process includes transmitting a PRACH preamble to the cell.

[0368] Example Embodiment 14. The method of any one of Example Embodiments 5 to 13, wherein the process includes transmitting a channel state information (CSI) report.

[0369] Example Embodiment 15. The method of any one of Example Embodiments 5 to 14, wherein the process includes transmitting HARQ feedback.

[0370] Example Embodiment 16. The method of any one of Example Embodiments 5 to 15, wherein the duration comprises a duration associated with an outage period caused by the CCA failure.

[0371] Example Embodiment 17. The method of any one of Example Embodiments 5 to 16, further comprising determining that the CCA failure has occurred, and extending the duration by an additional duration associated with an interruption caused by the CCA failure.

[0372] Example Embodiment 18. The method of any one of Example Embodiments 1 to 17, further comprising detecting an event that triggers the process.

[0373] Example Embodiment 19. The method of Example Embodiment 18, wherein the event comprises receiving a command from the network node.

[0374] Example embodiment 20. A method as described in any one of Example embodiments 1 to 19, wherein the process for selecting the cell associated with the CCA failure based on determining whether the cell is known or unknown includes: if the cell is known, selecting a first cell configuration process; and if the cell is unknown, selecting a second cell configuration process.

[0375] Example embodiment 21. The method as described in any of example embodiments 1 to 20, further comprising determining that at least one performance-related target is met when performing the process for configuring the cell associated with the CCA failure.

[0376] Example embodiment 22. A method as described in Example embodiment 21, wherein the at least one performance-related objective is met if at least one of the following items exists: the process is performed within a first duration; the process is performed during a second duration without creating an interruption; a report or feedback is transmitted within a third duration; the process is performed without exceeding a threshold associated with a maximum allowed downlink (DL) or uplink (UL) CCA impact; the process is performed without exceeding a maximum number of CCA failures; the process is performed without exceeding a maximum number of lost signal receptions; the process is performed without exceeding a maximum number of measurement opportunities; and / or the process is performed without exceeding a maximum number of transmissions.

[0377] Example embodiment 23. The method of any one of example embodiments 1 to 22, further comprising: determining a CCA impact of executing the process when executing the process; and comparing the CCA impact to at least one threshold.

[0378] Example Embodiment 24. The method of Example Embodiment 23, wherein the CCA failure is associated with one of a plurality of types of CCA failures, and wherein a corresponding threshold value of a plurality of threshold values ​​is associated with each type of CCA failure within the plurality of types of CCA failures.

[0379] Example embodiment 25. The method as described in any of example embodiments 23 to 24 further includes: completing the process if the CCA impact of executing the process is equal to or less than the at least one threshold; or stopping the process if the CCA impact of executing the process is greater than the at least one threshold.

[0380] Example embodiment 26. The method of any one of example embodiments 24 to 25, further comprising: restarting at least a portion of the process if the CCA impact of executing the process is equal to or greater than the at least one threshold.

[0381] Example Embodiment 27. The method of Example Embodiment 26, counting the number of times at least the portion of the process has been restarted, and aborting the process if the number is greater than a threshold.

[0382] Example Embodiment 28. The method of any one of Example Embodiments 1 to 27, further comprising maintaining a timer and aborting the process or a portion of the process if the timer expires.

[0383] Example Embodiment 29. The method of any one of Example Embodiments 1 to 28, wherein the cell is a PSCell.

[0384] Example embodiment 30. A computer program comprising instructions, which when executed on a computer, perform any one of the methods of example embodiments 1 to 29.

[0385] Example embodiment 31. A computer program product comprising a computer program, the computer program comprising instructions, the instructions when executed on a computer, performing any one of the methods of example embodiments 1 to 29.

[0386] Example embodiment 32. A non-transitory computer readable medium storing instructions that, when executed by a computer, perform any one of the methods of example embodiments 1 to 29.

[0387] Example embodiment 33. A method performed by a network node (such as, for example, a base station), the method comprising: detecting a clear channel assessment (CCA) failure; determining whether a cell associated with the CCA failure is known or unknown; selecting a process for configuring the cell associated with the CCA failure based on determining whether the cell is known or unknown; and transmitting information associated with the process to a wireless device for performing the process.

[0388] Example embodiment 34. The method of example embodiment 33, wherein the CCA failure is a downlink CCA failure.

[0389] Example embodiment 35. The method of example embodiment 33, wherein the CCA failure is an uplink CCA failure.

[0390] Example embodiment 36. A method as described in any of example embodiments 33 to 35, wherein the process is used for at least one of the following items: activating or adding a primary secondary cell (PSCell); activating or adding a secondary cell (SCell); transmission configuration indication (TCI) state switching; and updating an active TCI state list.

[0391] Example Embodiment 37 The method of any one of Example Embodiments 33 to 36, further comprising determining an amount of time required for the wireless device to perform the process based on whether the cell associated with the CCA failure is known or unknown.

[0392] Example Embodiment 38. The method of any one of Example Embodiments 33 to 37, further comprising: determining an amount of time for determining whether the process was successfully completed, and using the amount of time to determine whether the process was successfully completed.

[0393] Example Embodiment 39. The method of Example Embodiment 38, wherein the time used to determine whether the process was successfully completed is equal to the amount of time required for the wireless device to successfully perform the process.

[0394] Example Embodiment 40. The method of Example Embodiment 38, further comprising determining that the process has not been successfully completed by the wireless device during the amount of time, and retransmitting the information associated with the process to the wireless device.

[0395] Example Embodiment 41. The method of Example Embodiment 38, further comprising: determining that the process was successfully completed by the wireless device during the amount of time, and performing at least one operation in response to determining that the process was successfully completed.

[0396] Example Embodiment 42. The method of Example Embodiment 41, wherein the at least one operation comprises scheduling downlink or uplink transmissions to the wireless device in the cell.

[0397] Example Embodiment 43. The method of any one of Example Embodiments 33 to 42, further comprising: determining an outage window for when the wireless device can create an outage on the cell, wherein the outage is associated with the process.

[0398] Example Embodiment 44. The method of Example Embodiment 43, further comprising: adapting scheduling of the network nodes to avoid during the outage window.

[0399] Example embodiment 45 The method as described in any one of example embodiments 33 to 44 also includes determining whether the network node has received at least one report from the wireless device during a duration before triggering the process, and wherein: if the at least one report has been received by the network node during the duration before triggering the process, it is determined that the cell is known; and if the at least one report has not been received by the network node during the duration before triggering the process, it is determined that the cell is unknown.

[0400] Example Embodiment 46. The method of Example Embodiment 45, wherein the duration is selected from a plurality of durations, each duration of the plurality of durations being associated with a respective type of CCA failure.

[0401] Example Embodiment 47. The method of any of Example Embodiments 45 to 46, wherein the duration is extended by an additional amount of time to compensate for the CCA failure.

[0402] Example Embodiment 48. The method of any of Example Embodiments 45 to 47, further comprising extending the duration by an additional amount of time to provide additional time for the CCA failure.

[0403] Example Embodiment 49. The method of any of Example Embodiments 47 to 48, wherein the additional amount of time is an actual reporting delay associated with the CCA failure or a maximum acceptable reporting delay for the CCA failure.

[0404] Example embodiment 50. A method as described in any of example embodiments 47 to 49, wherein the additional time amount is selected based on at least one of the following items: the configuration of the measured downlink signal (such as periodicity, density, bandwidth, DRX cycle length, SINR, frequency range, DTX cycle length, etc.); the configuration of the transmitted uplink signal (such as periodicity, density, bandwidth, DRX cycle length, SINR, frequency range, DTX cycle length, etc.); the actual number of downlink or uplink transmission attempts.

[0405] Example Embodiment 51. The method of any one of Example Embodiments 45 to 50, further comprising determining that at least one SSB measured from the cell remains detectable during the duration.

[0406] Example embodiment 52. The method as described in any of example embodiments 45 to 51 also includes determining that at least one SSB measured from the cell remains detectable based on at least one cell identification condition when the SSB is available at the wireless device (for example, not lost due to the failure of the CCA).

[0407] Example Embodiment 53. The method of any one of Example Embodiments 45 to 52, wherein the process includes transmitting, by the wireless device, a PRACH preamble to the cell.

[0408] Example Embodiment 54. The method of any one of Example Embodiments 45 to 53, wherein the process includes transmitting a channel state information (CSI) report.

[0409] Example Embodiment 55. The method of any one of Example Embodiments 45 to 54, wherein the process includes transmitting HARQ feedback.

[0410] Example Embodiment 56. The method of any of Example Embodiments 45 to 55, wherein the duration comprises a duration associated with an outage period caused by the CCA failure.

[0411] Example Embodiment 57. The method of any of Example Embodiments 45 to 56, further comprising determining that the CCA failure has occurred, and extending the duration by an additional duration associated with an interruption caused by the CCA failure.

[0412] Example Embodiment 58. The method of any one of Example Embodiments 33 to 57, further comprising transmitting a command from the network node to trigger the process.

[0413] Example embodiment 59. A method as described in any one of example embodiments 33 to 58, wherein the process for selecting the cell associated with the CCA failure based on determining whether the cell is known or unknown includes: if the cell is known, selecting a first cell configuration process; and if the cell is unknown, selecting a second cell configuration process.

[0414] Example embodiment 60. The method of any one of example embodiments 33 to 59, further comprising determining that at least one performance-related target is met when performing the process for configuring the cell associated with the CCA failure.

[0415] Example embodiment 61. A method as described in example embodiment 60, wherein the at least one performance-related objective is met if at least one of the following items exists: the process is performed within a first duration; the process is performed during a second duration without creating an interruption; a report or feedback is transmitted within a third duration; the process is performed without exceeding a threshold associated with a maximum allowed downlink (DL) or uplink (UL) CCA impact; the process is performed without exceeding a maximum number of CCA failures; the process is performed without exceeding a maximum number of lost signal receptions; the process is performed without exceeding a maximum number of measurement opportunities; and / or the process is performed without exceeding a maximum number of transmissions.

[0416] Example embodiment 62. The method of any one of example embodiments 33 to 61, further comprising: determining a CCA impact of an execution process; and comparing the CCA impact to at least one threshold.

[0417] Example Embodiment 63. The method of Example Embodiment 62, wherein the CCA failure is associated with one of a plurality of types of CCA failures, and wherein a corresponding threshold value of a plurality of threshold values ​​is associated with each type of CCA failure within the plurality of types of CCA failures.

[0418] Example embodiment 64. The method as described in any of example embodiments 62 to 63 further includes: configuring the wireless device to complete the process if the CCA impact of executing the process is equal to or less than the at least one threshold; or configuring the wireless device to stop the process if the CCA impact of executing the process is greater than the at least one threshold.

[0419] Example embodiment 65. The method of any one of example embodiments 62 to 63, further comprising configuring the wireless device to restart at least a portion of the process if the CCA impact of performing the process is equal to or greater than the at least one threshold.

[0420] Example embodiment 66. The method of any one of example embodiments 62 to 63, further comprising configuring the wireless device to count the number of times at least the portion of the process has been restarted, and to abandon the process if the number is greater than a threshold.

[0421] Example Embodiment 67. The method of any one of Example Embodiments 33 to 66, further comprising configuring the wireless device to maintain a timer and abandon the process or a portion of the process if the timer expires.

[0422] Example embodiment 68. The method as described in any of example embodiments 62 to 63 further includes: if the CCA impact of performing the process is equal to or less than the at least one threshold, transmitting a signal indicating that the wireless device will complete the process; or if the CCA impact of performing the process is greater than the at least one threshold, transmitting a signal indicating that the wireless device will stop the process.

[0423] Example embodiment 69. The method as described in any of example embodiments 62 to 63 further includes: if the CCA impact of performing the process is equal to or greater than the at least one threshold, transmitting a signal indicating that the wireless device will restart at least a portion of the process.

[0424] Example Embodiment 70. The method of any of Example Embodiments 62 to 63, further comprising transmitting a signal instructing the wireless device to abandon the process if at least the portion of the process has been restarted a number of times greater than a threshold.

[0425] Example Embodiment 71. The method of any one of Example Embodiments 33 to 70, further comprising: if the timer expires, transmitting a signal to the wireless device to indicate that the process is to be abandoned.

[0426] Example embodiment 72. A computer program comprising instructions which, when executed on a computer, perform any one of the methods of example embodiments 33 to 71.

[0427] Example embodiment 73. A computer program product comprising a computer program, the computer program comprising instructions, the instructions when executed on a computer, performing any of the methods of example embodiments 33 to 71.

[0428] Example embodiment 74. A non-transitory computer readable medium storing instructions that, when executed by a computer, perform any of the methods of embodiments 33 to 71.

[0429] Example embodiment 75. A method performed by a wireless device, the method comprising: detecting a clear channel assessment (CCA) failure; and extending a duration for performing a procedure by an amount of time based on the CCA failure.

[0430] Example embodiment 76. The method of example embodiment 75 further includes: determining whether a cell associated with the CCA failure is known or unknown; and determining an amount of time associated with the duration based on whether the CCA failure is known or unknown.

[0431] Example Embodiment 77. The method of any one of Example Embodiments 75 to 76, further comprising performing the process for the extended duration.

[0432] Example embodiment 78. The method of any one of example embodiments 75 to 77, wherein the CCA failure is a downlink CCA failure.

[0433] Example embodiment 79. The method of any one of example embodiments 75 to 77, wherein the CCA failure is an uplink CCA failure.

[0434] Example embodiment 80. A method as described in any of example embodiments 75 to 79, wherein the process is used for at least one of the following items: activating or adding a primary secondary cell (PSCell); activating or adding a secondary cell (SCell); transmission configuration indication (TCI) state switching; and updating an active TCI state list.

[0435] Example embodiment 81. The method as described in any of example embodiments 75 to 80 also includes determining whether at least one report was sent to a network node during a duration before triggering the process, and selecting the amount of time for performing the process based on whether the at least one report was sent to the network node during the duration.

[0436] Example Embodiment 82. The method of Example Embodiment 81, wherein the amount of time is selected from a plurality of time durations, each time duration in the plurality of time durations being associated with a respective type of CCA failure.

[0437] Example Embodiment 83. The method of any one of Example Embodiments 75 to 82, wherein the amount of time is an actual reporting delay associated with the CCA failure or a maximum acceptable reporting delay for the CCA failure.

[0438] Example embodiment 84. A method as described in any of example embodiments 75 to 83, wherein the amount of time is selected based on at least one of the following items: the configuration of the measured downlink signal (such as periodicity, density, bandwidth, DRX cycle length, SINR, frequency range, DTX cycle length, etc.); the configuration of the transmitted uplink signal (such as periodicity, density, bandwidth, DRX cycle length, SINR, frequency range, DTX cycle length, etc.); the actual number of downlink or uplink transmission attempts.

[0439] Example Embodiment 85. The method of any one of Example Embodiments 75 to 84, further comprising determining that at least one SSB measured from the cell remains detectable during the duration.

[0440] Example embodiment 86. The method as described in any of example embodiments 75 to 85 also includes determining that at least one SSB measured from the cell remains detectable based on at least one cell identification condition when the SSB is available at the wireless device (for example, not lost due to the failure of the CCA).

[0441] Example Embodiment 87. The method of any one of Example Embodiments 75 to 86, wherein the process includes transmitting a PRACH preamble to the cell.

[0442] Example Embodiment 88. The method of any one of Example Embodiments 75 to 87, wherein the process includes transmitting a channel state information (CSI) report.

[0443] Example Embodiment 89. The method of any one of Example Embodiments 75 to 88, wherein the process includes transmitting HARQ feedback.

[0444] Example Embodiment 90. The method of any one of Example Embodiments 75 to 89, wherein the amount of time is associated with an outage period caused by the CCA failure.

[0445] Example Embodiment 91. The method of any one of Example Embodiments 75 to 90, further comprising detecting an event that triggers the process.

[0446] Example Embodiment 92. The method of Example Embodiment 91, wherein the event comprises receiving a command from the network node.

[0447] Example embodiment 93. The method of any one of example embodiments 75 to 92, further comprising determining that at least one performance-related target is met when performing the process for configuring the cell associated with the CCA failure.

[0448] Example embodiment 93. A method as described in Example embodiment 93, wherein the at least one performance-related objective is met if at least one of the following items exists: the process is performed within a first duration; the process is performed during a second duration without creating an interruption; a report or feedback is transmitted within a third duration; the process is performed without exceeding a threshold associated with a maximum allowed downlink (DL) or uplink (UL) CCA impact; the process is performed without exceeding a maximum number of CCA failures; the process is performed without exceeding a maximum number of lost signal receptions; the process is performed without exceeding a maximum number of measurement opportunities; and / or the process is performed without exceeding a maximum number of transmissions.

[0449] Example embodiment 97. The method as described in any of example embodiments 75 to 96, further comprising: determining a CCA impact of executing the process when executing the process; and comparing the CCA impact with at least one threshold.

[0450] Example embodiment 98. The method of example embodiment 97, wherein the CCA failure is associated with one of a plurality of types of CCA failures, and wherein a corresponding threshold value of a plurality of threshold values ​​is associated with each type of CCA failure within the plurality of types of CCA failures.

[0451] Example embodiment 99. The method as described in any of example embodiments 97 to 98 further includes: completing the process if the CCA impact of executing the process is equal to or less than the at least one threshold; or stopping the process if the CCA impact of executing the process is greater than the at least one threshold.

[0452] Example embodiment 100. The method of any one of example embodiments 97 to 98, further comprising: restarting at least a portion of the process if the CCA impact of executing the process is equal to or greater than the at least one threshold.

[0453] Example Embodiment 101. The method of Example Embodiment 100, further comprising counting a number of times at least the portion of the process has been restarted, and aborting the process if the number is greater than a threshold.

[0454] Example embodiment 102. The method of any one of example embodiments 75 to 101, further comprising maintaining a timer and aborting the process or a portion of the process if the timer expires.

[0455] Example embodiment 103. The method of any one of example embodiments 75 to 102, wherein the cell is a PSCell.

[0456] Example embodiment 104. A computer program comprising instructions, which when executed on a computer, perform any one of the methods of example embodiments 75 to 103.

[0457] Example embodiment 105. A computer program product comprising a computer program, the computer program comprising instructions, the instructions when executed on a computer, performing any of the methods of example embodiments 75 to 103.

[0458] Example embodiment 106. A non-transitory computer readable medium storing instructions that, when executed by a computer, perform any one of the methods of example embodiments 75 to 103.

[0459] Example embodiment 107. A method performed by a network node, the method comprising: detecting a clear channel assessment (CCA) failure; and extending a duration for performing a process by a certain amount of time based on the CCA failure; and transmitting information indicating the duration for performing the process to a wireless device.

[0460] Example embodiment 108. The method of example embodiment 108, further comprising: determining whether a cell associated with the CCA failure is known or unknown; and determining an amount of time associated with the duration based on whether the CCA failure is known or unknown.

[0461] Example Embodiment 109. The method of any one of Example Embodiments 107 to 108, further comprising performing the process for the extended duration.

[0462] Example embodiment 110. The method of any one of example embodiments 107 to 109, wherein the CCA failure is a downlink CCA failure.

[0463] Example embodiment 111. The method of any one of example embodiments 107 to 109, wherein the CCA failure is an uplink CCA failure.

[0464] Example embodiment 112. A method as described in any of example embodiments 107 to 111, wherein the process is used for at least one of the following items: activating or adding a primary secondary cell (PSCell); activating or adding a secondary cell (SCell); transmission configuration indication (TCI) state switching; and updating an active TCI state list.

[0465] Example embodiment 113. The method as described in any of example embodiments 107 to 112 also includes determining whether at least one report was sent to the network node during a duration before triggering the process, and selecting the amount of time for performing the process based on whether the at least one report was sent to the network node during the duration.

[0466] Example Embodiment 114. The method of Example Embodiment 113, wherein the amount of time is selected from a plurality of time durations, each time duration in the plurality of time durations being associated with a respective type of CCA failure.

[0467] Example Embodiment 115. The method of any of Example Embodiments 107 to 114, wherein the amount of time is an actual reporting delay associated with the CCA failure or a maximum acceptable reporting delay for the CCA failure.

[0468] Example embodiment 116. A method as described in any of example embodiments 107 to 114, wherein the time amount is selected based on at least one of the following items: the configuration of the measured downlink signal (such as periodicity, density, bandwidth, DRX cycle length, SINR, frequency range, DTX cycle length, etc.); the configuration of the transmitted uplink signal (such as periodicity, density, bandwidth, DRX cycle length, SINR, frequency range, DTX cycle length, etc.); the actual number of downlink or uplink transmission attempts.

[0469] Example Embodiment 117. The method of any of Example Embodiments 107 to 116, further comprising determining that at least one SSB measured from the cell remains detectable during the duration.

[0470] Example embodiment 118. The method as described in any of example embodiments 107 to 117 also includes determining that at least one SSB measured from the cell remains detectable based on at least one cell identification condition when the SSB is available at the wireless device (for example, not lost due to the failure of the CCA).

[0471] Example Embodiment 119. The method of any of Example Embodiments 107 to 118, wherein the process includes transmitting a PRACH preamble to the cell.

[0472] Example Embodiment 120. The method of any one of Example Embodiments 107 to 119, wherein the process includes transmitting a channel state information (CSI) report.

[0473] Example Embodiment 121. The method of any of Example Embodiments 107 to 120, wherein the process includes transmitting HARQ feedback.

[0474] Example Embodiment 122. The method of any of Example Embodiments 107 to 121, wherein the amount of time is associated with an outage period caused by the CCA failure.

[0475] Example Embodiment 123. The method of any one of Example Embodiments 107 to 122, further comprising detecting an event that triggers the process.

[0476] Example Embodiment 124. The method of Example Embodiment 123, wherein the event comprises receiving a command from the network node.

[0477] Example embodiment 125. The method of any one of example embodiments 107 to 124, further comprising determining that at least one performance-related target is met when performing the process for configuring the cell associated with the CCA failure.

[0478] Example embodiment 126. A method as described in example embodiment 125, wherein the at least one performance-related objective is met if at least one of the following items exists: the process is performed within a first duration; the process is performed during a second duration without creating an interruption; a report or feedback is transmitted within a third duration; the process is performed without exceeding a threshold associated with a maximum allowed downlink (DL) or uplink (UL) CCA impact; the process is performed without exceeding a maximum number of CCA failures; the process is performed without exceeding a maximum number of lost signal receptions; the process is performed without exceeding a maximum number of measurement opportunities; and / or the process is performed without exceeding a maximum number of transmissions.

[0479] Example embodiment 127. The method of any one of example embodiments 107 to 126, further comprising: determining a CCA impact of an execution process; and comparing the CCA impact to at least one threshold.

[0480] Example Embodiment 128. The method of Example Embodiment 127, wherein the CCA failure is associated with one of a plurality of types of CCA failures, and wherein a corresponding threshold value of a plurality of threshold values ​​is associated with each type of CCA failure within the plurality of types of CCA failures.

[0481] Example embodiment 129. The method as described in any of example embodiments 107 to 128 further includes: configuring the wireless device to complete the process if the CCA impact of executing the process is equal to or less than the at least one threshold; or configuring the wireless device to stop the process if the CCA impact of executing the process is greater than the at least one threshold.

[0482] Example embodiment 130. The method of any one of example embodiments 107 to 128, further comprising configuring the wireless device to restart at least a portion of the process if the CCA impact of performing the process is equal to or greater than the at least one threshold.

[0483] Example Embodiment 131. The method of Example Embodiment 130, further comprising configuring the wireless device to count a number of times at least the portion of the process has been restarted, and to abandon the process if the number is greater than a threshold.

[0484] Example Embodiment 132. The method of any one of Example Embodiments 107 to 131, further comprising configuring the wireless device to maintain a timer and abandon the process or a portion of the process if the timer expires.

[0485] Example Embodiment 133. The method of any one of Example Embodiments 107 to 132, wherein the cell is a PSCell.

[0486] Example embodiment 134. A computer program comprising instructions, which when executed on a computer, perform any one of the methods of example embodiments 107 to 133.

[0487] Example embodiment 135. A computer program product comprising a computer program, the computer program comprising instructions, the instructions when executed on a computer, performing any of the methods of example embodiments 107 to 133.

[0488] Example embodiment 136. A non-transitory computer readable medium storing instructions that, when executed by a computer, perform any of the methods of example embodiments 107 to 133.

[0489] Example embodiment 137. A wireless device for improving network efficiency, the wireless device comprising: a processing circuit, the processing circuit is configured to perform any one of the steps as described in any one of example embodiments 1 to 26 and 75 to 106; and a power supply circuit, the power supply circuit is configured to supply power to the wireless device.

[0490] Example embodiment 138. A base station for improving network efficiency, the base station comprising: a processing circuit, the processing circuit is configured to perform any one of the steps as described in any one of example embodiments 27 to 74 and 107 to 136; a power supply circuit, the power supply circuit is configured to supply power to the wireless device.

[0491] Without departing from the scope of the present disclosure, the systems and devices described herein may be modified, added, or omitted. The components of the systems and devices may be integrated or separated. In addition, the operations of the systems and devices may be performed by more, less, or other components. In addition, any suitable logic including software, hardware, and / or other logic may be used to perform the operations of the systems and devices. As used in this document, "each" refers to each member of a set or each member of a subset of a set.

[0492] Without departing from the scope of the present disclosure, the methods described herein may be modified, added, or omitted. The methods may include more, fewer, or other steps. In addition, the steps may be performed in any suitable order.

[0493] Although the present disclosure has been described according to certain embodiments, the changes and substitutions of the embodiments will be clear to those skilled in the art. Therefore, the above description of the embodiments does not limit the present disclosure. Other changes, substitutions, and variations are possible without departing from the spirit and scope of the present disclosure.

[0494] Additional Information

[0495] Chapter A

[0496] Regarding the active TCI state switching and active TCI state list update for NR-U in RAN4#92, in R4-1910551, WF on RRM requirements for NR-U, Ericsson, Qualcomm Inc., Nokia, NokiaShanghai Bell, August 2019, the following have been agreed [1]:

[0497] ● Need to update known TCI status definitions for NR-U

[0498] ● Longer time required to complete active TCI state transition due to failure to receive DRS due to DL LBT failure

[0499] ● In the TCI requirement, the maximum acceptable number of missed DRS opportunities due to LBT is limited

[0500] ● If the maximum acceptable number is exceeded, FFS on UE behavior

[0501] ● Failure to transmit ACK due to UL LBT failure (when ACK is transmitted on an unlicensed carrier) may result in longer process delays as the UE retries transmission

[0502] In this paper, we further discuss the active TCI state switching requirements for NR-U.

[0503] TCI switching in NR: The TCI state describes the QCL relationship of reference signals or SSBs and CORESET / PDSCH configured in a specific cell with cell ID within a specific bandwidth part with BWP ID. NR UE can be configured with one or more TCI state configurations on the serving cell in MR-DC or standalone NR. There can be one or more active TCI states in the active TCI state list, and the UE can perform active TCI state switching based on different triggers (e.g., RRC-based switching, MAC CE-based switching, DCI-based switching).

[0504] There are two types of requirements associated with TCI status:

[0505] Active TCI state transition delay, and

[0506] Active TCI status list updated.

[0507] Switch to known TCI state

[0508] MAC-CE based TCI state switching: When a PDSCH carrying MAC-CE is received in time slot n, the UE is required to use the new TCI state (after switching or active TCI state list update) in time slot n+T HARQ +3ms+TO k *(T first-SSB +T SSB-proc ) and receive PDCCH using the old TCI state until time slot n+T HARQ +3ms+TO k *(T first-SSBThe added 3ms is used to decode the MAC message, which is performed after decoding the PDSCH.

[0509] For RRC-based TCI state switching: When a PDSCH carrying an RRC message is received in time slot n, the UE is required to use the new TCI state in time slot n+T RRC_processing +TO k *(T first-SSB +T SSB-proc There is no requirement to use the old TCI state to receive PDCCH during the switching period.

[0510] In the above:

[0511] When the target TCI state is in the list of active TCI states for PDSCH, TO k = 0, and otherwise TO k = 1 (UE needs to synchronize to SSB before starting reception on PDCCH using new TCI state);

[0512] T first-SSB and T SSB-proc is the time between receiving the TCI switch command and the first available SSB associated with the target TCI state and the time for processing said SSB;

[0513] T HARQ is the time between the reception of a PDSCH transport block and the UE transmitting an ACK or NACK for successful or unsuccessful decoding of the transport block to the network node;

[0514] T RRC_processing is the time between receiving a PDSCH with an RRC message and having fully decoded the RRC message.

[0515] DCI based TCI state switching (target TCI state must be part of the active TCI state list): The UE has to switch to the new TCI state without first synchronizing to the SSB associated with the target TCI state, but it takes time (timeDurationForQCL specified in TS38.306) to perform PDCCH reception and apply the spatial QCL information received in the DCI.

[0516] Switching to unknown TCI state

[0517] MAC-CE based switching: When a PDSCH carrying MAC-CE is received in time slot n, the UE is required to use the new TCI state in time slot n+T HARQ +3ms+T L1-RSRP +TO uk *(T first-SSB+T SSB-proc ) and receive PDCCH using the old TCI state until time slot n+T HARQ +3ms+T L1-RSRP +TO uk *(T first-SSB )until.

[0518] RRC-based handover: requires the UE to use the new TCI state in time slot n+T RRC_processing +T L1-RSRP +TO uk *(T first-SSB +T SSB-proc ) in the PDCCH. There is no requirement to use the old TCI state to receive the PDCCH during switching.

[0519] For the unknown case, the UE also performs L1-RSRP measurements on SSB or CSI-RS depending on the configuration provided by the network node (at T L1-RSRP If L1-RSRP is on CSI-RS, the UE needs additional time to synchronize to SSB before it is ready to receive PDCCH using the new TCI state (thus, for SSB-based L1-RSRP, TO uk =0, and for CSI-RS L1-RSRP, TO uk =1).

[0520] Definition of known TCI states in NR-U

[0521] In NR-U, SSBs can still be transmitted via different beams and the UE can be configured with multiple states, so TCI state switching requirements are also needed in NR-U, where LBT can be performed by the corresponding node in DL or in DL and UL.

[0522] In the presence of LBT, the UE needs to correctly distinguish between known and unknown states, and also complete the active TCI state switching and list update procedures within the specified delay.

[0523] In TS 38.133, the TCI state is known if the following conditions have been met:

[0524] - A TCI state switch command is received within

[1280] ms of the last transmission of RS resources used for beam reporting or measurement for the target TCI state

[0525] - The UE has sent at least one measurement report for the target TCI state

[0526] -TCI state remains detectable during TCI state switching cycle

[0527] - The SSB associated with the TCI state remains detectable during the TCI switching period.

[0528] -TCI state SNR is ≥-3dB

[0529] Otherwise, the TCI status is unknown.

[0530] To accommodate the known TCI state definitions for NR-U, several aspects need to be updated, including the time since the last transmission or measurement of the target TCI state, the ability of the UE to send reports in the presence of UL LBT, detectability which cannot always be guaranteed due to LBT, etc.

[0531] • Solution 1: In the opportunities where SSB is available at the UE, during the TCI switching period where the SNR satisfies the TCI state condition (which is ≥ -3dB), the TCI state remains detectable.

[0532] ● Solution 2: The maximum time between the reception of the TCI state switching command and the last transmission of RS resources for beam reporting or measurement for the target TCI state is extended, for example,

[1280] + L*T SSB ms+Δ, where L is the number of measurement opportunities with SSBs unavailable at the UE due to CCA, and Δ is the reporting delay due to UL LBT failure and UE retrying to report at least 1 measurement for the target TCI state (provided UL resources are configured for the UE) (for channel access category 1, Δ=0).

[0533] ●Scheme 3: The maximum value of L and Δ is TBD. When the maximum value is exceeded, the UE will assume that the TCI state is unknown.

[0534] Active TCI state switching in NR-U for known cells

[0535] MAC-CE based handover

[0536] When a PDSCH carrying a MAC-CE is received in time slot n, the UE is required to use the new TCI state (after handover or active TCI state list update) in time slot n+(T HARQ,ref +Δ HARQ )+3ms+TO k *(T first-SSB +T SSB-proc +T SSB *L MAC,known ) and receive PDCCH using the old TCI state until time slot n+(T HARQ,ref +Δ HARQ )+3ms+TO k *(Tfirst-SSB +T SSB *L MAC,known )until,

[0537] in:

[0538] Add 3ms for decoding MAC messages, which is done after decoding PDSCH,

[0539] T HARQ，ref is the time between the reception of a PDSCH transport block as specified in TS 38.213 [3] and the UE transmitting an ACK or NACK to the network node regarding the successful or unsuccessful decoding of said transport block,

[0540] Δ HARQ is the delay in HARQ feedback due to UL LBT failure and UE retrying to transmit HARQ feedback (provided UL resources are configured for the UE) (for channel access category 1, Δ HARQ =0),

[0541] L MAC，known is the corresponding number of SSB opportunities that are unavailable at the UE due to CCA failure,

[0542] T SSB is the SSB periodicity.

[0543] ● Solution 4: For MAC-CE based TCI state switching, the UE is required to use the new TCI state (after switching or active TCI state list update) in time slot n+(T HARQ,ref +Δ HARQ )+3ms+TO k *(T first-SSB +T SSB-proc +T SSB *L MAC,known ) and receive PDCCH using the old TCI state until time slot n+(T HARQ,ref +Δ HARQ )+3ms+TO k *(T first-SSB +T SSB *L MAC,known ), where the parameters are as defined above.

[0544] ●Scheme 5: Δ HARQ The maximum value of TBD is TBD, when this maximum value is exceeded, the UE may stop attempting to transmit HARQ feedback and may abandon the active TCI state switching process.

[0545] ●Scheme 6: L MAC，known The maximum value is TBD and may depend on T SSB, when this maximum value is exceeded, the UE may stop switching and abandon the active TCI state switching process.

[0546] RRC-based handover

[0547] When a PDSCH carrying an RRC message is received in time slot n, the UE is required to use the new TCI state in time slot n+T RRC_processing +TO k *(T first-SSB +T SSB-proc +T SSB *L RRC,known There is no requirement to use the old TCI state to receive PDCCH during the switching period, where

[0548] L RRC，known is the corresponding number of SSB opportunities that are unavailable at the UE due to CCA failure,

[0549] T SSB is the SSB periodicity.

[0550] ●Solution 7: For RRC-based TCI state switching, the UE is required to use the new TCI state in time slot n+T RRC_processing +TO k *(T first-SSB +T SSB-proc +T SSB *L RRC,known ) in which PDCCH is received, where the parameters are as defined above.

[0551] ●Scheme 8: L RRC，known The maximum value is TBD and may depend on T SSB , when this maximum value is exceeded, the UE may stop switching and abandon the active TCI state switching process.

[0552] Active TCI state switching in NR-U for unknown cells

[0553] MAC-CE based handover

[0554] When a PDSCH carrying a MAC-CE is received in time slot n, the UE is required to use the new TCI state in time slot n+(T HARQ,ref +Δ HARQ )+3ms+(T L1-RSRP +T CSI-RS / SSB *L1 MAC,unknown )+TO uk *(T first-SSB +T SSB-proc +T SSB *L2 MAC,unknown) and receive PDCCH using the old TCI state until time slot n+(T HARQ,ref +Δ HARQ )+3ms+(T L1-RSRP +T CSI-RS / SSB *L1 MAC,unknown )+TO uk *(T first-SSB +T SSB *L2 MAC,unknown )until,

[0555] in:

[0556] T HARQ，ref is the time between the reception of a PDSCH transport block as specified in TS 38.213 [3] and the UE transmitting an ACK or NACK to the network node regarding the successful or unsuccessful decoding of said transport block,

[0557] Δ HARQ is the delay in HARQ feedback due to UL LBT failure and UE retrying to transmit HARQ feedback (provided UL resources are configured for the UE) (for channel access category 1, Δ HARQ =0),

[0558] L1 MAC，unknown is the corresponding number of opportunities with signals measured for L1-RSRP that are unavailable at the UE due to CCA failure,

[0559] L2 MAC，unknown is the corresponding number of SSB opportunities that are unavailable at the UE due to CCA failure,

[0560] T CSI-RS / SSB is the periodicity of the signal measured for L1-RSRP (SSB or CSI-RS),

[0561] T SSB is the SSB periodicity.

[0562] ● Solution 9: For MAC-CE based handover, the UE is required to use the new TCI state in time slot n+(T HARQ,ref +Δ HARQ )+3ms+(T L1-RSRP +T CSI-RS / SSB *L1 MAC,unknown )+TO uk *(T first-SSB +T SSB-proc +T SSB *L2 MAC,unknown ) and receive PDCCH using the old TCI state until time slot n+(T HARQ,ref +ΔHARQ )+3ms+(T L1-RSRP +T CSI-RS / SSB *L1 MAC,unknown )+TO uk *(T first-SSB +T SSB *L2 MAC,unknown ), where the parameters are as defined above.

[0563] ●Scheme 10: Δ HARQ The maximum value of TBD is TBD, when this maximum value is exceeded, the UE may stop attempting to transmit HARQ feedback and may abandon the active TCI state switching process.

[0564] ●Scheme 11: L1 MAC，unknown The maximum value is TBD and may depend on T CSI-RS，SSB , when this maximum value is exceeded, the UE may restart the L1-RSRP measurement, but the UE may abandon the active TCI state switching procedure after completing N unsuccessful attempts at L1-RSRP measurement.

[0565] Solution 12: L2 MAC，unknown The maximum value is TBD and may depend on T SSB , when this maximum value is exceeded, the UE may stop switching and abandon the active TCI state switching process.

[0566] RRC-based handover

[0567] Requires UE to use new TCI state in time slot n+T RRC_processing +(T L1-RSRP +T CSI-RS / SSB *L1 RRC,unknown )+TO uk *(T first-SSB +T SSB-proc +T SSB *L2 RRC,unknown ) receives PDCCH,

[0568] in

[0569] L1 RRC，unknown is the corresponding number of opportunities with signals measured for L1-RSRP that are unavailable at the UE due to CCA failure,

[0570] L2 RRC，unknown is the corresponding number of SSB opportunities that are unavailable at the UE due to CCA failure,

[0571] T CSI-RS / SSB is the periodicity of the signal measured for L1-RSRP (SSB or CSI-RS),

[0572] TSSB is the SSB periodicity.

[0573] ●Scheme 13: For RRC-based handover, the UE is required to use the new TCI state in time slot n+T RRC_processing +(T L1-RSRP +T CSI-RS / SSB *L1 RRC,unknown )+TO uk *(T first-SSB +T SSB-proc +T SSB *L2 RRC,unknown ) in which PDCCH is received, where the parameters are as defined above.

[0574] ●Scheme 14: L1 RRC，unknown The maximum value is TBD and may depend on T CSI-RS，SSB , when this maximum value is exceeded, the UE may restart the L1-RSRP measurement, but the UE may abandon the active TCI state switching procedure after completing N unsuccessful attempts at L1-RSRP measurement.

[0575] Solution 15: L2 RRC，unknown The maximum value is TBD and may depend on T SSB , when this maximum value is exceeded, the UE may stop switching and abandon the active TCI state switching process.

[0576] Section B

[0577] In R4-1907331, WF on RRM requirements for NR-U, Ericsson, mid-May 2019, agreement was reached on the PSCell add / release delay requirement for NR-U for scenario B.

[0578] In R4-1910551, WF on RRM requirements for NR-U, Ericsson, Qualcomm Inc., Nokia, Nokia Shanghai Bell, mid-August 2019, further agreement was reached on the following:

[0579] ●PSCell release delay is not affected by signal availability and the existing requirements in 7.31 of 36.331 shall apply In this paper, we further discuss the PSCell addition delay requirements for NR-U.

[0580] PSCell in NR adds latency

[0581] In Rel-15, when a PSCell addition is received in subframe n, the UE shall be able toconfig PSCell The PRACH preamble is transmitted to the PSCell in which:

[0582] T config_PSCell =T RRC_delay +T processing +T search +T Δ +T PSCell_DU +2msT RRC_delay is the RRC procedure delay as specified in TS 36.331.

[0583] T processing is the SW processing time required by the UE, including the RF warm-up period. For FR1, T processing =20ms.

[0584] T search is the time used for AGC settlement and PSS / SSS detection. If the target cell is known, then T search = 0ms. If the target cell is unknown, provided that the side conditions are met Then T search =3*Trsms.

[0585] T Δ is the time used for fine time tracking of the target cell and obtaining complete timing information. For known PSCells and for unknown PSCells, T Δ =1*Trs ms.

[0586] T PSCell_DU is the delay uncertainty in acquiring the first available PRACH opportunity in the PSCell. PSCell_DU Up to the sum of the SSB to PRACH opportunity association period and 10 ms. The SSB to PRACH opportunity association period is defined in Table 8.1-1 of TS 38.213.

[0587] If the UE has been provided with the SMTC configuration of the target cell in the PSCell Add message, Trs is the SMTC periodicity of the target cell, otherwise Trs is the SMTC configured in measObjectNR with the same SSB frequency and subcarrier spacing. If no SMTC configuration or measurement object is provided to the UE on this frequency, the requirements in this section apply with Trs = [5] ms and with an SSB transmission periodicity of [5] ms.

[0588] Known PSCell definitions in NR-U

[0589] In the presence of LBT, the UE needs to correctly distinguish between the known and unknown states of the PSCell, otherwise the PSCell may, for example, always be regarded as unknown, which means longer procedure delays.

[0590] The NR PSCell is known if the following conditions are met:

[0591] During the last [5] seconds before receiving the NR PSCell Configuration Command:

[0592] - the UE has sent valid measurement reports for the configured NR PSCell, and

[0593] - Depending on the cell identification condition, one of the SSBs measured from the configured NR PSCell remains detectable as specified in clause 9.3 of TS 38.133.

[0594] - Depending on the cell identification condition, during the NR PSCell configuration delay, one of the SSBs measured from the configured NR PSCell also remains detectable as specified in clause 9.3 of TS 38.133.

[0595] Otherwise the NR PSCell is unknown.

[0596] ●Solution 1: The known PSCell definition needs to be updated for NR-U.

[0597] To accommodate the known PSCell cell definition for NR-U, several aspects need to be updated, including the time since the last measurement report, the ability of the UE to send reports in the presence of UL LBT, detectability which cannot always be guaranteed due to LBT, etc.

[0598] ● Solution 2: In the opportunities where SSB is available at the UE, the measured SSB remains detectable according to the cell identification condition.

[0599] ● Solution 3: The time before the reception of the PSCell configuration command is extended to take into account the DL LBT, for example, to [5] seconds + L*T RS +Δ, where L is the number of SMTC opportunities that are unavailable at the UE due to CCA, and Δ is the reporting delay caused by UL LBT failure and the UE retrying to report at least 1 measurement for the PSCell being configured (provided UL resources are configured for the UE) (for channel access category 1, Δ=0).

[0600] ●Scheme 4: The maximum value of L and Δ is TBD. When the maximum value is exceeded, the UE will assume that the PSCell is unknown.

[0601] Extended PSCell Addition Delay in NR-U

[0602] ●Solution 5: To consider DL and UL LBT, extend T config PSCell , which will be specified in TS 36.133.

[0603] That is, T specified in TS 38.133 config PSCell The following components are affected by LBT: T search , T Δ and T PSCell_DU .

[0604] The impact of LBT can be captured as follows:

[0605] T config_PSCell =T RRC_delay +T processing +T search +T Δ +(T PSCell_DU,ref +Δ PRACH )+2ms,

[0606] in

[0607] For a known PSCell, T search =0, and T search =(3+L1)*Trs,

[0608] T Δ =Trs*(1+L2),

[0609] L1 and L2 ≤ are the corresponding number of SMTC opportunities that are unavailable at the UE due to CCA failure,

[0610] T PSCell_DU，ref is the delay uncertainty of acquiring the first PRACH opportunity in the PSCell without considering CCA.

[0611] T PSCell_DU Up to the sum of the SSB to PRACH opportunity association period and 10ms. The SSB to PRACH opportunity association period is defined in Table 8.1-1 of TS 38.213 [3],

[0612] Δ PRACH ≤Δ PRACH.max is the additional delay from the first PRACH opportunity to the PRACH opportunity at which the UE can transmit, due to UL LBT failure and UE retrying to transmit PRACH (for channel access category 1, Δ PRACH =0), and therefore depends on the number of times the UE attempts to obtain a channel for transmission.

[0613] ●Option 6: T config_PSCell =T RRC_delay +T processing +T search +T Δ +(T PSCell_DU,ref +Δ PRACH )+2ms, where for a known PSCell, T search = 0, and for unknown PSCell, T search =(3+L1)*Trs,T Δ =Trs*(1+L2), and where the other parameters are as defined above.

[0614] ●Scheme 7: Δ PRACH The maximum value (Δ PRACH，max ) is TBD, when this maximum value is exceeded, the UE may stop attempting to transmit PRACH and may abandon the PSCell addition procedure.

[0615] ● Scheme 8: The maximum values ​​of L1 and L2 are TBD and can depend on T RS When the maximum value is exceeded, the UE may restart the search and timing acquisition process, but after completing N unsuccessful attempts of the search and timing acquisition process, the UE may abandon PSCell addition.

[0616] Section C

[0617] Regarding the SCell activation delay for NR-U in RAN4#92, in R4-1910551, WF on RRMrequirements for NR-U, Ericsson, Qualcomm Inc., Nokia, Nokia Shanghai Bell, mid-August 2019, the following have been agreed:

[0618] ●SCell activation delay in NR-U needs to be considered by considering the T activation_time and T CSI_reporting The delay is extended by the number of SSBs lost at the UE due to DL LBT failure during the period.

[0619] The maximum acceptable number of SSBs lost due to LBT is TBD

[0620] ●Known SCell definitions need to be updated for NR-U

[0621] ● If the UE needs to perform UL LBT before sending ACK, the SCell activation delay needs to be further extended by a time reflecting the number of UL LBT failures.

[0622] From RAN4#91 for NR-U SCell, related agreement R4-1907331, WF on RRM requirementsfor NR-U, Ericsson, May 2019:

[0623] ●Activation period: may depend on SSB availability, new requirements may be required

[0624] ● Deactivation period: not dependent on SSB availability, Rel-15 NR requirement can be the baseline.

[0625] In this paper, we further discuss the SCell activation delay for NR-U.

[0626] In NR FR1, when an SCell activation command is received in time slot n, the UE shall be able to transmit a valid CSI report and apply the actions related to the activation command causing the SCell activation no later than the following time slots:

[0627] in:

[0628] T HARQ (in ms) is the timing between DL data transmission and acknowledgment as specified in TS 38.213 [3].

[0629] T activation_time is the SCell activation delay in milliseconds.

[0630] If the SCell is known and belongs to FR1, then T activation_time yes:

[0631] - If the SCell measurement period is equal to or less than 160ms, then T FirstSSB +5ms.

[0632] - If the SCell measurement period is greater than 160ms, then T SMTC_MAX +T rs +5ms.

[0633] If the SCell is unknown and belongs to FR1, then T activation_time yes:

[0634] - If the SCell can be successfully detected on the first attempt, then 2*T SMTC_MAX +2*T rs +5ms.

[0635] Where T SMTC_MAX :

[0636] For intra-band SCell activation, if the cell-specific reference signals from the active serving cell and the SCell being activated or released are available in the same time slot, then T SMTC_MAX is the longer SMTC periodicity between the active serving cell and the activated SCell; in the following cases

[0637] For inter-band SCell activation, T SMTC_MAX is the SMTC periodicity of the activated SCell.

[0638] T SMTC_MAX Limited to a minimum of 10ms.

[0639] If the UE has been provided with the SMTC configuration of the SCell in the SCell Add message, T rs is the SMTC periodicity of the activated SCell, otherwise T rs is the SMTC configured in the measObjectNR with the same SSB frequency and subcarrier spacing. If no SMTC configuration or measurement object is provided to the UE on this frequency, provided that the SSB transmission periodicity is 5ms, then rs =5ms, the application involves T rs If the SSB transmission periodicity is not 5ms, there is no requirement.

[0640] T FirstSSB :n+T HARQ +3ms later to the time of the first SSB indicated by SMTC

[0641] T CSI_reporting is the delay (in ms) as specified in TS 38.331 [2], including the uncertainty in obtaining the first available downlink CSI reference resource, the UE processing time for CSI reports, and the uncertainty in obtaining the first available CSI reporting resource

[0642] In addition to the CSI reporting defined above, once the SCell is activated, the UE shall also apply other actions related to the activation command specified for the SCell in TS 38.331 [2] at the first opportunity of the corresponding action.

[0643] Starting from the time slot specified in clause 4.3 [3] of TS 38.213 (Timing of secondary cell activation / deactivation) and until the UE has completed SCell activation, the UE shall report out of range if it has available uplink resources for reporting the CQI of the SCell.

[0644] SCell activation in NR-U Known SCell definition

[0645] In Rel-15, an NR SCell in FR1 is known if it already meets the following conditions:

[0646] - During a period equal to max([5]measCycleSCell, [5]DRXcycle) of FR1 before receiving the SCell activation command:

[0647] - The UE has sent a valid measurement report for the activated SCell, and

[0648] - The measured SSB remains detectable according to the cell identification conditions specified in clause 9.2

[0649] - Subject to the cell identification conditions specified in clause 9.2, SSBs measured during a period equal to max([5]measCycleSCell, [5]DRXcycle) also remain detectable during the SCell Activation Delay.

[0650] Otherwise, the SCell in FR1 is unknown.

[0651] In order to adapt the known SCell definition to NR-U, several aspects need to be updated, including the measurement period before receiving the SCell activation command and detectability which cannot always be guaranteed due to lost signal, and sending valid measurement reports in the presence of UL LBT failure.

[0652] ● Solution 1: The period before receiving the SCell activation command is extended to, for example, (5+L DL )measCycleSCell+Δ UL , when DRX is not configured, and

[0653] max((5+L DL )measCycleSCell,(5+L DL )DRX cycles)+Δ UL , when DRX is configured,

[0654] Where L DL ≤L DL，max is the number of measurement opportunities with SSBs unavailable at the UE due to CCA, Δ UL ≤Δ UL，max is the additional delay caused by the UE not being able to send valid measurement reports on the carrier frequency with CCA (for UL channel access category 1, Δ UL =0).

[0655] ● Option 2: L DL，max =TBD and ΔUL，max =TBD. When any of them is exceeded, the SCell can be considered unknown.

[0656] ● Solution 3: In the opportunities where SSB is available at the UE, the SSB remains detectable according to the cell identification conditions in clause 9.2.

[0657] Extended SCell activation delay in NR-U

[0658] Next, we discuss the impact of LBT on SCell activation latency.

[0659] From T HARQ Initially, for channel access category 2, UL LBT failure may occur and HARQ feedback transmission may be additionally delayed.

[0660] ● Option 4: T HARQ =T HARQ，ref +Δ HARQ , where T HARQ，ref is the timing between DL data transmission and acknowledgment as specified in TS 38.213 [3], and Δ HARQ ≤Δ HARQ，max is the delay in HARQ feedback due to UL LBT failure and UE retrying to transmit HARQ feedback (provided resources are configured for the UE) (for channel access category 1, Δ HARQ =0).

[0661] ● Option 5: Δ HARQ，max =TBD, when exceeded, the UE may stop attempting to transmit HARQ feedback and may abandon the SCell activation process.

[0662] In addition, the SCell activation time T activation_time is also affected by DL LBT failure and is therefore extended as follows.

[0663] ● Option 6: T activation_time The definition is as follows (where L1≤L1 max , L2≤L2 max and L3≤L3 max is the corresponding number of SSB opportunities that are unavailable at the UE due to CCA failure):

[0664] For a known SCell:

[0665] -T FirstSSB +T rs *L1+5ms, if the SCell measurement period is equal to or less than 160ms.

[0666] -(T SMTC_MAX +T rs )*(1+L2)+5ms, if the SCell measurement period is greater than 160ms.

[0667] For unknown SCell:

[0668] -(T SMTC_MAX +T rs )*(2+L3)+5ms, if the SCell can be successfully detected in one attempt.

[0669] ● Solution 7: L1 max 、L2 max and L3 max is TBD, when exceeded, the UE may stop activating the SCell and may abandon the SCell activation procedure.

[0670] Next, it is expected that the UE will CSI_reporting Valid CSI reports are reported during this period, which may also be affected by UL LBT failures.

[0671] ● Option 8: T CSI_reporting =T CSI_reporting，ref +Δ CSI , where T CSI_reporting，ref is the delay (in ms) including the uncertainty in obtaining the first available downlink CSI reference resource, the UE processing time for CSI reporting, and the uncertainty in obtaining the first available CSI reporting resource, as specified in TS 38.331 [2], and Δ CSI ≤Δ CSI，max is the additional delay due to UL LBT failure and UE retrying to transmit CSI report (provided resources are configured for UE) (for channel access category 1, Δ CSI =0).

[0672] ● Scheme 9: Δ CSI , max=TBD, when exceeded, the UE may stop attempting to transmit CSI reports and may abandon the SCell activation procedure.

[0673] Blackout Window

[0674] After sending HARQ feedback to the serving cell (after receiving the SCell activation command), the UE may cause an outage for a certain period of time, not being allowed to have an outage window starting earlier than a certain time and ending later than another certain time. In Rel-15, this is governed by the following requirements:

[0675] For the EN-DC mode specified in clause 8.2, an outage on a PSCell or any activated SCell in an SCG shall not occur in time slot n+1+[T HARQ ] / slot_length, nor should it occur in the time slot n+1+[T HARQ +3ms+T SMTC_MAX +T SMTC_duration ] / slot_length.

[0676] For NR standalone mode as specified in clause 8.2, an outage on the PCell or any activated SCell in the MCG shall not occur in time slot n+1+[T HARQ ] / slot_length, nor should it occur in the time slot n+1+[T HARQ +3ms+T SMTC_MAX +T SMTC_duration ] / slot_length.

[0677] (Note that the current version of the specification is not proportional to the slot length, and is therefore incorrect with respect to time units.)

[0678] In NR-U, the start time of the interruption window needs to be dynamically adapted to the UL LBT result. That is, the corresponding interruption should not occur in time slot n+1+(T HARQ +Δ HARQ，L ) / slot_length, and should not occur in time slot n+1+((T HARQ +Δ HARQ，L )+3ms+T SMTC_MAX +T SMTC_duration ) / slot_length, Δ HARQ，L is the additional delay after the first HARQ feedback opportunity until HARQ feedback is sent in the last opportunity due to the L missed HARQ feedback opportunities.

[0679] ● Scheme 10: The timing of the interruption window for SCell activation in NR-U is defined such that the corresponding interruption should not occur in time slot n+1+(T HARQ +Δ HARQ，L ) / slot_length, and should not occur in time slot n+1+((T HARQ +Δ HARQ，L )+3ms+T SMTC_MAX +T SMTC_duration ) / slot_length, where L is the number of times the UE fails to access the channel for transmitting HARQ feedback.

Claims

1. A method (1400) performed by a wireless device (110), the method comprising: receiving (1402) a command associated with a procedure for establishing or releasing a cell or signal from a network node (160); detecting (1404) one or more clear channel assessment (CCA) failures on an uplink signal while transmitting hybrid automatic repeat request (HARQ) feedback associated with said process for establishing or releasing said cell or signal; and extending (1406) a transmission period for transmitting the HARQ feedback associated with the process for establishing or releasing the cell or signal based on the one or more CCA failures, The extending the transmission period for transmitting the HARQ feedback includes: extending the transmission period based on a number of times the wireless device 110 fails to send the HARQ feedback due to the one or more CCA failures; or increasing a maximum number of times the wireless device 110 is allowed to fail to send the HARQ feedback due to the one or more CCA failures; or Adapting the start time instances of the interruption periods caused by the process.

2. The method of claim 1, wherein: The HARQ feedback includes a HARQ acknowledgment or a HARQ negative acknowledgment.

3. The method of claim 1, wherein: The HARQ feedback includes a measurement report.

4. The method according to any one of claims 1 to 3, wherein: The process for establishing or releasing the cell or the signal includes a process for at least one of the following: Establish or release a serving cell; Configure or reconfigure a special cell SpCell; Activate or deactivate the primary and secondary cells (PSCells); Activate or deactivate the secondary cell SCell; Transmission configuration indication TCI of switching beam; as well as Updates the active TCI status list.

5. The method according to any one of claims 1 to 3, wherein: Detecting the one or more CCA failures on the uplink signal comprises: determining that the HARQ feedback was not successfully sent to the network node during a duration prior to triggering the procedure for establishing or releasing the cell or the signal; and Extending the transmission period for transmitting the HARQ feedback associated with the process includes selecting an amount of time for performing the process based on the HARQ feedback not being successfully sent to the network node during the duration prior to triggering the process.

6. The method of claim 5, wherein: The amount of time is selected from a plurality of durations based on a type of the one or more CCA failures, wherein each duration of the plurality of durations is associated with a respective type of CCA failure.

7. The method of claim 5, wherein: The amount of time is an actual reporting delay associated with the one or more CCA failures or a maximum acceptable reporting delay for the one or more CCA failures.

8. The method of claim 5, wherein: The amount of time is selected based on an actual number of transmission attempts of the HARQ feedback.

9. The method according to any one of claims 1 to 3, wherein: The process for establishing or releasing the cell or the signal comprises transmitting a PRACH preamble to the cell.

10. The method according to any one of claims 1 to 3, wherein: The process for establishing or releasing the cell or the signal includes transmitting a channel state information (CSI) report.

11. The method of any one of claims 1 to 3, further comprising detecting an event triggering the process for establishing or releasing the cell or the signal.

12. The method of claim 11, wherein: The event comprises receiving a command from the network node.

13. The method according to any one of claims 1 to 3, further comprising: When performing the procedure for establishing or releasing the cell or the signal, determining a CCA impact of performing the procedure; as well as The CCA impact is compared to at least one threshold, wherein the CCA failure is associated with one of a plurality of types of CCA failures, and wherein a respective threshold of a plurality of thresholds is associated with each type of CCA failure within the plurality of types of CCA failures.

14. The method of claim 13, further comprising: completing the process if the CCA impact of performing the process is equal to or less than the at least one threshold; or If the CCA impact of executing the process is greater than the at least one threshold, the process is stopped.

15. The method of claim 13, further comprising: If the CCA impact of executing the process is equal to or greater than the at least one threshold, at least a portion of the process is restarted.

16. The method of claim 15, further comprising counting a number of times at least the portion of the process has been restarted and aborting the process if the number is greater than a threshold.

17. The method of any one of claims 1 to 3, further comprising maintaining a timer and aborting the process or a portion of the process if the timer expires.

18. A wireless device (110) comprising a processing circuit (120) configured to perform any of the methods of claims 1 to 17.

19. A method performed by a wireless device, the method comprising: When performing a procedure for establishing or releasing a cell or a signal, detecting a clear channel assessment CCA fails; as well as determining an outage window during which the wireless device cannot transmit or receive due to the CCA failure, The determining of the interruption window includes adapting a start time of the interruption window, wherein the start time increases at least as the number of times the wireless device fails to send a feedback signal due to the CCA failure.

20. The method of claim 19, wherein: The blackout window includes an amount of time during which the wireless device is unable to transmit or receive due to the CCA failure.

21. The method of any one of claims 19-20, wherein: The feedback signal includes at least one of the following: Hybrid Automatic Repeat Request HARQ feedback, Channel Quality Indicator (CQI) reporting, and Layer 1 - Reference Signal Received Power L1-RSRP reporting.

22. The method of any one of claims 19-20, wherein: The feedback signal includes a hybrid automatic repeat request (HARQ) feedback, and the method further includes: determining that the number of times the wireless device fails to send the HARQ feedback exceeds a threshold; and Perform at least one action to not cause any more interruptions, the at least one action comprising: discarding the process due to which the wireless device sends the HARQ feedback, and The process is restarted, and the wireless device sends the HARQ feedback as a result of the process.

23. A wireless device comprising a processing circuit configured to perform any of the methods of claims 19 to 22.

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