WO2020038546A1

WO2020038546A1 - Multi-purpose wake-up signal in new radio

Info

Publication number: WO2020038546A1
Application number: PCT/EP2018/072427
Authority: WO
Inventors: Juha Pekka Karjalainen; Timo Koskela; Sami-Jukka Hakola; Jorma Kaikkonen
Original assignee: Nokia Technologies Oy
Priority date: 2018-08-20
Filing date: 2018-08-20
Publication date: 2020-02-27

Abstract

Systems, methods, apparatuses, and computer program products that provide multi- purpose wake-up signal(s) are described. One method includes defining, by a network node, a plurality of different triggering states for a wake-up signal. The method may then include associating at least one of the wake-up signal specific triggering states with a wake- up signaling space and at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels, and configuring (or transmitting to) a user equipment with at least one of the wake-up signal specific triggering states and their association(s).

Description

TITLE:

MULTI-PURPOSE WAKE-UP SIGNAL IN NEW RADIO

FIELD:

[0001] Some example embodiments may generally relate to mobile or wireless telecommunication systems, such as Long Term Evolution (LTE) or fifth generation (5G) radio access technology or new radio (NR) access technology, or other communications systems. For example, certain embodiments may relate to NR physical layer design and wake-up signals in NR.

BACKGROUND:

[0002] Examples of mobile or wireless telecommunication systems may include the Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN), Long Term Evolution (LTE) Evolved UTRAN (E-UTRAN), LTE- Advanced (LTE-A), MulteFire, LTE-A Pro, and/or fifth generation (5G) radio access technology or new radio (NR) access technology. Fifth generation (5G) or new radio (NR) wireless systems refer to the next generation (NG) of radio systems and network architecture. It is estimated that NR will provide bitrates on the order of 10-20 Gbit/s or higher, and will support at least enhanced mobile broadband (eMBB) and ultra- reliable low-latency-communication (URLLC) as well as massive machine type communication (mMTC). NR is expected to deliver extreme broadband and ultra- robust, low latency connectivity and massive networking to support the Internet of Things (IoT). With IoT and machine-to-machine (M2M) communication becoming more widespread, there will be a growing need for networks that meet the needs of lower power, low data rate, and long battery life. It is noted that, in 5G or NR, the nodes that can provide radio access functionality to a user equipment (i.e., similar to Node B in E-UTRAN or eNB in LTE) may be referred to as a next generation or 5G Node B (gNB).

SUMMARY:

[0003] One embodiment is directed to an apparatus, which may include at least one processor and at least one memory comprising computer program code. The at least one memory and computer program code configured, with the at least one processor, to cause the apparatus at least to define a plurality of different triggering states for a wake-up signal, to associate at least one of the wake-up signal specific triggering states with a wake-up signaling space and at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels, and to configure a user equipment with the at least one of the wake-up signal specific triggering states and their association with the wake-up signaling space and said at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels.

[0004] Another embodiment is directed to a method that may include defining, by a network node, a plurality of different triggering states for a wake-up signal, associating at least one of the wake-up signal specific triggering states with a wake-up signaling space and at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels, and configuring a user equipment with said at least one of the wake-up signal specific triggering states and their association with the wake-up signaling space and said at least one of pre- configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels.

[0005] Another embodiment is directed to an apparatus that may include means for defining a plurality of different triggering states for a wake-up signal, means for associating at least one of the wake-up signal specific triggering states with a wake-up signaling space and at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels, and means for configuring a user equipment with said at least one of the wake-up signal specific triggering states and their association with the wake-up signaling space and said at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels.

[0006] Another embodiment is directed to an apparatus that may include circuitry configured for defining a plurality of different triggering states for a wake-up signal, circuitry configured for associating at least one of the wake-up signal specific triggering states with a wake-up signaling space and at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels, and circuitry configured for configuring a user equipment with said at least one of the wake-up signal specific triggering states and their association with the wake-up signaling space and said at least one of pre- configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels.

[0007] Another embodiment is directed to a computer readable medium comprising program instmctions stored thereon for performing at least the following: defining a plurality of different triggering states for a wake-up signal, associating at least one of the wake-up signal specific triggering states with a wake-up signaling space and at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels, and configuring a user equipment with said at least one of the wake-up signal specific triggering states and their association with the wake-up signaling space and said at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels.

[0008] In an embodiment, the wake-up signaling space may be defined to cover one or more antenna ports associated with the wake-up signal transmitted simultaneously or separately in time, frequency, code and spatial domains. According to an embodiment, at least one of the wake-up signal specific triggering states may encapsulate an association with at least one triggering state for the user equipment receiver antenna panels with antenna panel indices and/or at least one triggering state for the user equipment transmit antenna panels with antenna panel indices.

[0009] In some embodiments, the wake-up signal triggering state for the user equipment receiver antenna panels or the user equipment transmit antenna panels may define a de-activation of set of receiver antenna panels or transmit antenna panels associated with the antenna panel indices and activation of a new set of user equipment receiver antenna panels or user equipment transmit antennal panels with antenna panel indices, or the wake-up signal triggering state for the user equipment receiver antenna panels or the user equipment transmit antenna panels may define the activation of a set of new user equipment receiver antenna panels or user equipment transmit antenna panels associated with antenna panel indices while maintaining current antenna panels as active.

[0010] In an embodiment, at least one of the wake-up signal specific triggering states encapsulates an association with at least one triggering state for downlink and/or uplink reference signals.

[0011] According to an embodiment, wake-up signal specific triggering states for downlink channel state information reference signal (CSI-RS) may be associated with at least one of: aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for downlink (DL) beam management (BM) that are located within discontinuous reception (DRX) onDuration or paging occasion (PO), aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for downlink (DL) channel measurements located within discontinuous reception (DRX) onDuration or paging occasion (PO), aperiodic Non- Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for radio link monitoring (RLM) located within discontinuous reception (DRX) onDuration or paging occasion (PO), aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for beam failure detection (BFD) located within discontinuous reception (DRX) onDuration or paging occasion (PO), periodic channel state information reference signal (CSI-RS) resource set(s) with resource(s) enabling measurements for mobility that are outside of OnDuration or paging occasion (PO), aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling interference measurements, and/or aperiodic Zero Power (ZP)- CSI-RS resource set(s) with resource(s) for interference measurements.

[0012] In an embodiment, wake-up signal specific triggering states for periodic or semi-persistent channel state information interference measurement resource (CSI-IM) set may be associated with resource(s) enabling interference measurements that are outside of OnDuration or paging occasion (PO). According to an embodiment, wake- up signal specific triggering states for aperiodic uplink sounding reference signal (SRS) sets may be associated with resources are located within discontinuous reception (DRX) onDuration or paging occasion (PO) configured, wherein the sounding reference signal (SRS) sets are configured for at least one of antenna switching, uplink beam management, non-codebook transmission, and code -book transmission.

[0013] In an embodiment, the at least one memory and computer program code may be further configured, with the at least one processor, to cause the apparatus at least to define a combination of wake-up signal triggering states for at least one of Non-Zero-Power (NZP) or zero power (ZP) channel state information (CSI) reference signal (RS), channel state information interference measurement resource (CSI-IM), and sounding reference signal (SRS) triggering states for different measurements and reporting.

[0014] According to an embodiment, the at least one memory and computer program code may be further configured, with the at least one processor, to cause the apparatus at least to associate the at least one of the wake-up signal specific triggering states with one or more of the control resource sets (CORESETs) to enable the monitoring of a physical downlink control channel (PDCCH) associated with multiple transmission points.

[0015] In an embodiment, the at least one memory and computer program code may be further configured, with the at least one processor, to cause the apparatus at least to associate said at least one of the wake-up signal specific triggering states with uplink signaling preamble resources.

[0016] According to an embodiment, the wake-up signal space is associated with specific triggering states for different downlink or uplink bandwidth parts. In an embodiment, the at least one memory and computer program code are further configured, with the at least one processor, to cause the apparatus at least to define combined use of the wake-up signal specific triggering states for at least one of: different pre- configured bandwidth parts, triggering states for downlink and uplink reference signals, and/or different control resource sets (CORESETs).

[0017] Another embodiment is directed to an apparatus, which may include at least one processor and at least one memory comprising computer program code. The at least one memory and computer program code configured, with the at least one processor, to cause the apparatus at least to receive, from a network node, at least one wake-up signal specific triggering state and its associations with a wake-up signaling space and at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels, to perform, based on the received said at least one wake-up signal specific triggering state and its associations, channel state information reference signal resource set based measurements without decoding a physical downlink control channel, and to report results of the measurements to the network node.

[0018] Another embodiment is directed to a method that may include receiving, from a network node, at least one wake-up signal specific triggering state and its associations with a wake-up signaling space and at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels, performing, based on the received said at least one wake-up signal specific triggering state and its associations, channel state information reference signal resource set based measurements without decoding a physical downlink control channel, and reporting results of the measurements to the network node.

[0019] Another embodiment is directed to an apparatus that may include means for receiving, from a network node, at least one wake-up signal specific triggering state and its associations with a wake-up signaling space and at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels, means for performing, based on the received said at least one wake-up signal specific triggering state and its associations, channel state information reference signal resource set based measurements without decoding a physical downlink control channel, and means for reporting results of the measurements to the network node.

[0020] Another embodiment is directed to an apparatus that may include circuitry configured for receiving, from a network node, at least one wake-up signal specific triggering state and its associations with a wake-up signaling space and at least one of pre- configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels, circuitry configured for performing, based on the received said at least one wake-up signal specific triggering state and its associations, channel state information reference signal resource set based measurements without decoding a physical downlink control channel, and circuitry configured for reporting results of the measurements to the network node.

[0021] Another embodiment is directed to a computer readable medium comprising program instmctions stored thereon for performing at least the following: receiving, from a network node, at least one wake-up signal specific triggering state and its associations with a wake-up signaling space and at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels, performing, based on the received said at least one wake-up signal specific triggering state and its associations, channel state information reference signal resource set based measurements without decoding a physical downlink control channel, and reporting results of the measurements to the network node.

[0022] In an embodiment, the at least one memory and computer program code may be further configured, with the at least one processor, to cause the apparatus at least to perform non-zero-power (NZP) channel state information reference signal resource set based measurements for beam management, channel state information acquisition, or interference measurements during discontinuous reception (DRX) onDuration.

[0023] According to an embodiment, the at least one memory and computer program code may be further configured, with the at least one processor, to cause the apparatus at least to report the results of the measurements either within onDuration or outside of onDuration. BRIEF DESCRIPTION OF THE DRAWINGS:

[0024] For proper understanding of example embodiments, reference should be made to the accompanying drawings, wherein:

[0025] Fig. 1 illustrates an example of wake-up signal usage in FTE for paging when a UE is in IDEE mode;

[0026] Fig. 2 illustrates an example of a utilization of a wake-up signal based UE power enhancement for NR, according to an embodiment;

[0027] Fig. 3 illustrates an example of an association of wake-up signal state space with triggering states of aperiodic CSI-RS, according to an embodiment;

[0028] Fig. 4 illustrates an example of an association of wake-up signal triggering state to UE RX antenna panels, according to an embodiment;

[0029] Fig. 5 illustrates an example of wake-up signal triggering states for physical downlink control channel (PDCCH), according to an embodiment;

[0030] Fig. 6 illustrates an example of wake-up signal triggering state association with the combination of triggering states of aperiodic DF CSI-RS and UE SRS, according to an embodiment;

[0031] Fig. 7 illustrates an example of wake-up signal triggering state association with different pre-configured band-width part options, according to an embodiment;

[0032] Fig. 8 illustrates an example of the combination of pre-configured wake-up signal and aperiodic NZP-CSI-RS triggering states enabling different measurements during DRX onDuration and reporting within or outside of onDuration, according to an embodiment;

[0033] Fig. 9 illustrates an example of the combination of wake-up signal triggering states for bandwidth parts and wake-up signal for PDCCH and CSI-RS, according to an embodiment;

[0034] Fig. 10a illustrates an example flow diagram of a method, according to one embodiment;

[0035] Fig. 10b illustrates an example flow diagram of a method, according to an embodiment; [0036] Fig. l la illustrates an example block diagram of an apparatus, according to one embodiment; and

[0037] Fig. 1 lb illustrates an example block diagram of an apparatus, according to another embodiment.

DETAILED DESCRIPTION:

[0038] It will be readily understood that the components of certain example embodiments, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of some example embodiments of systems, methods, apparatuses, and computer program products that provide multi-purpose wake-up signal(s), is not intended to limit the scope of certain embodiments but is representative of selected example embodiments.

[0039] The features, structures, or characteristics of example embodiments described throughout this specification may be combined in any suitable manner in one or more example embodiments. For example, the usage of the phrases“certain embodiments,” “some embodiments,” or other similar language, throughout this specification refers to the fact that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment. Thus, appearances of the phrases“in certain embodiments,”“in some embodiments,”“in other embodiments,” or other similar language, throughout this specification do not necessarily all refer to the same group of embodiments, and the described features, structures, or characteristics may be combined in any suitable manner in one or more example embodiments.

[0040] Additionally, if desired, the different functions or steps discussed below may be performed in a different order and/or concurrently with each other. Furthermore, if desired, one or more of the described functions or steps may be optional or may be combined. As such, the following description should be considered as merely illustrative of the principles and teachings of certain example embodiments, and not in limitation thereof. [0041] Certain embodiments may relate, for example, to third generation partnership project (3GPP) New Radio (NR) physical layer design in Release 15 (Rel-l5) and onwards. For instance, one embodiment may enhance power efficiency of user equipment (UE) equipped with multiple antenna panels at high carrier frequencies.

[0042] In Rel-l5 NR, supported power saving mechanisms largely rely on mechanisms developed in LTE-A, e.g., relying on the discontinuous reception (DRX) concept with physical downlink control channel (PDCCH) monitoring without taking into account the multi-antenna panel or bandwidth part aspects at all. Hence, there is a need to enhance UE power saving mechanisms in NR Rel-16 beyond, including at above 6GHz communication.

[0043] Due to the sporadic nature of internet protocol (IP) based packet data traffic, data may need to be transmitted and received in a short time duration. Therefore, UEs are assumed to be inactive or in idle mode for most of the time. The inactive or idle operation enables a UE to go into a sleep mode to save power consumption

[0044] In LTE, two different network controlled UE power save operations via discontinuous reception modes (DRX) are supported. When a UE is in IDLE mode operation, the UE stays in sleeping mode defined in DRX cycle provided in system broadcast information 2 (SIB2). The UE periodically wakes-up to monitor PDCCH to check for the presence of paging information scrambled with paging radio network temporary identifier (P-RNTI) according to DRX cycle. If PDCCH indicates paging information, the UE needs to demodulate physical downlink shared channel (PDSCH) resources indicated by PDCCH. Otherwise, the UE can go into a sleep mode to save battery power. Here, a sub-frame time index where P-RNTI may be transmitted on PDCCH is referred to as paging occasion (PO). LTE also supports different group(s) of UEs to monitor different time instants for their paging messages. Depending on a monitoring periodicity of PDCCH, the network can control the draining of UE battery power. In another case, where a UE is in CONNECTED mode, the network may configure the UE with DRX cycle in sleeping mode. As a result of this, the UE monitors periodically the content of PDCCH for a potential PDSCH scheduling grant according to DRX cycle and wakes up when there is data available for the UE. Here, the time reserved for PDCCH monitoring for PDSCH scheduling grant and PDSCH demodulation is referred to as onDuration.

[0045] Due to all the time increasing data rates, bandwidths and antenna array sizes at UE side, UE power efficiency plays an important role in NR Rel-l5 and beyond. NR Rel-l5 and beyond systems need to support efficient network access with minimum power consumption. Currently, the 3 GPP specification(s) provide a support for power saving functionality for UE in IDLE, inactive state and connected modes by allowing the network to configure the UE with the DRX cycle for different sleeping periods.

[0046] In NR Rel-l5 technical specification (TS) 38.321, DRX functionality is supported in connected mode for UE power saving. When a UE is in a DRX mode, the UE monitors discontinuously PDCCH for whether there is data available for it or not. The specified DRX mode allows a network to configure by higher layers long and short DRX cycles. When DRX cycle is configured, as described in TS 38.321, active time includes the time where drx-onDurationTimer or drx-InactivityTimer or drx- RetransmissionTimerDL or drx-RetransmissionTimerUL or ra- ContentionResolutionTimer is running, a scheduling request is sent on PUCCH and is pending, or a PDCCH indicating a new transmission addressed to the C-RNTI of the media access control (MAC) entity has not been received after successful reception of a Random Access Response for the Random Access Preamble not selected by the MAC entity among the contention-based Random Access Preamble.

[0047] To enhance power saving of a device in addition to a potential discontinuous reception, a specific preamble signal, i.e., wake-up signal, has been considered in IEEE 802.1 lba to indicate to a device about the availability of data. Also, in order to enable enhanced power saving, a device may have a wake-up signal detection specific receiver that is as non-complex and low power hungry as possible.

[0048] In 3GPP RAN1, a wake-up signal (WUS) has been considered in Rel-l5 LTE in further-enhanced machine-type communication (eFEMTC) and narrow band internet of things (NB-IoT) study/work items (SI/WI). The main driver for the use of WUS is to reduce power consumption of PDCCH monitoring at the UE-side. A periodic monitoring of PDCCH for paging translates to a shortened UE battery life in idle mode. The reason for this is that, during the monitoring of PDCCH, the following steps need to be performed: Fast Fourier Transform (FFT) computation, channel estimation, blind decoding of PDCCH candidates for each configured search space as well as related decoding of channel coding. In Rel-15 eFEMTC, the monitoring need of PDCCH can be reduced by using WUS to indicate to the UE whether PDCCH needs to be monitored or not for IDLE mode paging. Because of this, UE power consumption can be reduced.

[0049] Fig. 1 illustrates an example of Rel-15 LTE WUS usage for paging when a UE is in IDLE mode. As can be seen from Fig. 1, WUS is placed prior to PDCCH transmission with a timing offset configured by a network. WUS specific monitoring parameters, such as periodicity, offset and pattern within a slot, have also been considered in eFEMTC. To enable the enhancement of UE battery life, the implementation of a specific detector for WUS should be as simple as possible, such as a correlator bank.

[0050] In 3GPP RAN 1-90 meeting, both WUS and Discontinuous Transmission (DTX) have been considered for indicating whether a UE needs to decode subsequent physical channels for idle mode paging. In RANl-90bis meeting, it was agreed that, during UE’s DRX cycle, a single wake-up signal informs the UE whether to monitor paging occasion (downlink control channel). Furthermore, WUS has been considered in conjunction with synchronization signals to enable time and frequency tracking with long DRX periodic in enhanced machine type communication (eMTC).

[0051] Furthermore, wake-up signal design aspects have also been considered as a part of Rel-15 NR-U SI. In Rel-16 NR-U, similar to Re- 15 LTE eFEMTC, WUS has been considered for indicating if PDCCH monitoring needs to be performed or not. In Rel-16 NR-U, the following signals have been considered as WUS: demodulation reference signal (DMRS) of PDCCH, DMRS of physical broadcast channel (PBCH), channel state information reference signal (CSI-RS) for frequency and time tracking (TRS), and/or CSI-RS for beam management (BM).

[0052] Fig. 2 illustrates an example of the potential use of WUS preamble/reference signal in the framework of NR Rel- 16 above 6GHz communication when a UE is in

DRX connected mode. WUS preamble/reference signal may be assigned prior to PDCCH in time to indicate to a UE whether it needs to wake-up to monitor PDCCH for scheduling grant during onDuration for PDSCH or continue sleeping. The indication of monitoring information may be encapsulated into a WUS preamble, e.g., a secondary synchronization signal (SSS). As a result of this, a WUS-specific receiver, such as a correlator bank, may be used to detect sequences associated with monitoring information. By avoiding unnecessary PDCCH monitoring, UE power efficiency can be further enhanced and enable the UE to continue sleeping.

[0053] Due to directive spatial transmission and reception at both the UE and gNB sides above 6GHz, a beam-based operation imposes several restrictions, e.g., in terms of multiplexing of signals, gNB scheduling, and/or UE reception, for the entire system operation. Therefore, there is a need to further enhance WUS-based power saving operations at above 6GHz communication.

[0054] To further enhance power saving operation above 6 GHz in NR Rel-l6 and beyond, it would be beneficial if the WUS itself could trigger further functionalities for a UE, such as measurements, bandwidth part switch, PDSCH demodulation, and reporting, without the need for power hungry PDCCH monitoring. Therefore, there is a need for WUS-based lightweight control signalling mehanism.

[0055] In view of the above, one embodiment described herein provides wake-up signal specific triggering states that are associated with different pre-configured uplink (UL) and downlink (DL) reference signal configurations, control resource sets (CORESETs), band-width parts and UE RX/TX antenna panels. In an embodiment, based on wake -up-signal specific signal space and triggering state association, a network can configure different procedures for UE, e.g., DL CSI-RS measurement (beam management, mobility, time-frequency tracking, channel state information (CSI) acquisition), different onDuration or paging occasion operations. Furthermore, according to some embodiments, the wake-up signal triggering states may enable the triggering of one or many bandwidth part from a pre-configured set of bandwidth parts without the need of PDCCH monitoring. Additionally, certain embodiments are able to active and/or de-active different UE RX/TX antenna panels for different purposes.

[0056] In one embodiment, different triggering states for a wake-up signal are defined. One or more of wake-up signal specific triggering states may define an association with a wake-up signal state space, as well as ab association with aperiodic DL reference signal and/or UL reference signal and/or band-width part option or CORESET option and/or UE RX antenna panels and/or UE TX antenna panels. According to an embodiment, the signal state space of a wake-up signal may be defined to cover over one or more antenna ports associated with wake-up signal transmitted simultaneously or separately in time, frequency, code and/or spatial domains. In addition, WUS signal may comprise a set of individual signals. The set of signals may depend, for example, on the UE state: IDLE or CONNECTED. For instance, there may be a common signal used in both states and additional signal in CONNECTED state to provide higher signaling space for the total WUS signal.

[0057] Fig. 3 illustrates an example of an association of a wake-up signal state space with wake-up signal specific triggering states in conjunction with aperiodic downlink CSI-RS triggering states or aperiodic uplink Sounding Reference Signal (SRS) triggering states. In an embodiment, a network may pre-configure a UE, for example by higher layer radio resource control (RRC) signalling, with wake-up signal specific triggering states and their association with wake-up signal space as well as triggering states of DL CSI-RS or UL SRS. The number of wake-up signal triggering states may be defined by a wake-up signal space. For example, if the size of the signal space defined in frequency/time/code/spatial domain is four, then four different wake-up signal specific triggering states may be configured. Within each wake-up signal specific triggering state, by RRC-signaling, a network may configure index to wake-up signal space as well as index to CSI-RS or SRS triggering states. As a result, there is one-to-one mapping of wake -up-signal space to wake-up signal specific triggering state as well as one-to-one mapping of wake-up signal specific triggering state to aperiodic CSI-RS or SRS triggering states. Furthermore, it is assumed that the network has pre- configured different aperiodic resources for measurement and their linkages to different reporting configurations for a UE. As a result of the combination of pre- configured triggering states of wake-up signal and CSI-RS or SRS, different aperiodic measurements, e.g., beam management, channel state information (CSI) acquisition, interference measurements (IM) and reporting procedures can be enabled during DRX onDuration or PO. [0058] According to one embodiment, the wake-up signal specific triggering state may encapsulate an association with one or more of the triggering states for UE RX antenna panels with antenna panel indices. For example, a wake-up signal specific triggering state for UE RX antenna panels may define the de-activation of a set of RX antenna panels associated with antenna panel indices (currently active or other antenna panel) and activation of a new set of UE RX antenna panels associated with antenna panel indices. In an embodiment, a wake-up signal specific triggering state for UE RX antenna panels may define the activation of a set of new UE RX antenna panels associated with antenna panel indices while also maintaining the current antenna panel as active. Fig. 4 illustrates an example of wake-up signal specific triggering state association with UE RX antenna panel activation and de-activation.

[0059] In one embodiment, the wake-up signal specific triggering state may encapsulate an association with one or more of the triggering states for UE TX antenna panels with antenna panel indices. According to an embodiment, a wake-up signal specific triggering state for UE TX antenna panels may define the de-activation of a set of TX antenna panels associated with antenna panel indices (current active or other antenna panel) and activation of a new set of UE TX antenna panels associated with antenna panel indices. In an embodiment, a wake-up signal specific triggering state for UE TX antenna panels may define the activation of a set of new UE TX antenna panels associated with antenna panel indices while also maintaining current antenna panel as active.

[0060] According to one embodiment, the wake-up signal specific triggering state may encapsulate an association with one or more of the triggering states for DL and/or UL reference signals as discussed in the following. In one example, wake-up signal specific triggering states for DL channel state information reference signal (CSI-RS) may be associated with: aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for DL beam management (BM) that are located within DRX onDuration or PO, aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for DL channel measurements located within DRX onDuration or PO, aperiodic NZP-CSI-RS resource set(s) with resource(s) enabling measurements for radio link monitoring (RLM) located within DRX onDuration or PO, aperiodic NZP-CSI-RS resource set(s) with resource(s) enabling measurements for beam failure detection (BFD) located within DRX onDuration or PO, periodic CSI-RS resource set(s) with resource(s) enabling measurements for mobility that are outside of OnDuration or paging occasion, aperiodic NZP-CSI-RS resource set(s) with resource(s) enabling interference measurements, and/or aperiodic Zero Power (ZP)-CSI-RS resource set(s) with resource(s) for interference measurements. In an embodiment, triggering state may be associated with local or global resource index/indices of mobility CSI-RS that are outside of DRX OnDuration or PO. According to some embodiments, wake-up signal specific triggering states for periodic/semi-persistent channel state information interference measurement resource (CSI-IM) set may be associated with resource enabling interference measurements that are outside of OnDuration or PO. In certain embodiments, wake-up signal specific triggering states for aperiodic UL SRS set with resources are located within DRX onDuration or PO configured where SRS sets are configured for antenna switching, uplink beam management, non-codebook transmission, and/or code -book transmission.

[0061] In one embodiment, a combination of WUS triggering states for NZP/ZP- CSI-RS and/or CSI-IM and/or SRS triggering states may be defined for different measurements and/or reporting. According to some embodiments, the use of WUS triggering is not limited to DRX onDuration or PO, but may also be used in the context of, for example, other occasions such as beam switch or primary to secondary carrier switch.

[0062] According to one embodiment, a wake-up signal specific triggering state may be associated with one or more CORESETs enabling the monitoring of PDCCH associated with multiple transmission points. For example, a triggering state may be associated with a combination of CORESET and search space configuration. In one example, the triggering state is valid within OnDuration and/or a certain time window from WUS.

[0063] Fig. 5 illustrates an example of wake-up signal specific triggering states for PDCCH triggering. In this example, the network may pre-configure, for a UE, a set of PDCCH search spaces. Each of PDCCH wake-up signal specific triggering state may be BWP specific and may be associated with PDCCH search space identity (SearchSpacelD) for a considered BWP.

[0064] In one embodiment, a wake-up signal triggering state may be associated with UL signaling (preamble) resources. According to one example, each resource may correspond to one transmitted aperiodic CSI-RS resource associated with triggering state. A UE may indicate the preferred CSI-RS resource in the configured resource set, and transmission of the indication may associate the reception of PDCCH DMRS with indicated downlink resource. In one example, UL SRS resources may be used as uplink signaling resources.

[0065] According to one embodiment, the wake-up signal space may be associated with specific triggering states for different DL and/or UL bandwidth parts. Lor example, a triggering state for band-width part may define de-activation of current band-width part and activation of new band-width part defined by association of triggering state and band-width part ID, where the band-width part ID is L-bit length and the L depends on the number of band-width parts associated with UL or DL. Lor TDD operation, uplink and downlink parts are the same.

[0066] In one embodiment, the combined use of wake-up signal specific triggering states for different pre-configured band-width parts and triggering states for DL and UL reference signals may be defined. According to an embodiment, the combined use of wake-up signal specific triggering states for different pre-configured band-width parts and different CORESETs may be defined. In a further embodiment, the combined use of wake-up signal specific triggering states for different pre-configured band-width parts and different CORESETs as well as triggering states for DL and UL reference signals may be defined. Tig. 6 illustrates an example of wake-up signal specific triggering state association when the triggering states of aperiodic DL CSI-RS and UL SRS are combined.

[0067] Tig. 7 illustrates an example of wake-up signal specific triggering state association with different bandwidth part options. Lor example, during DRX, a network can trigger UE to switch BWP without PDCCH monitoring for another BWP associated with the transmission of paging information. [0068] Fig. 8 illustrates an example of the combination of pre-configured wake-up signal specific triggering states and NZP-CSI-RS triggering states. In an embodiment, a network may have pre-configured, e.g., by higher-layer signalling, the association of wake-up signal space and relation to wake-up signal specific triggering states, as well as to aperiodic NZP-CSI-RS triggering states. By leveraging the wake-up signal specific triggering states, without requiring a UE to decode PDCCH, the network can trigger the UE to perform aperiodic NZP-CSI-RS resource set based measurements, e.g., for beam management or CSI-acquisition or interference measurements during DRX onDuration and carry out reporting of measurement results either within onDuration or outside of onDuration. Fig. 9 illustrates an example of the combination of wake-up signal specific triggering states for BWPs and wake-up signal for PDCCH and CSI-RS.

[0069] Fig. lOa illustrates an example flow diagram of a method for providing a multi-purpose wake-up signal, according to an example embodiment. In certain example embodiments, the flow diagram of Fig. lOa may be performed by a network entity or network node in a 3GPP system, such as LTE or 5G NR. For instance, in some example embodiments, the method of Fig. lOa may be performed by a base station, eNB, gNB, or an access node or the like in a 5G or NR system.

[0070] In one embodiment, the method of Fig. lOa may include, at 500, defining a plurality of different triggering states for a wake-up signal (i.e., defining wake-up signal specific triggering states). According to an embodiment, the defining 500 may include defining combined use of the wake-up signal specific triggering states for one or more of different pre-configured bandwidth parts, triggering states for downlink and uplink reference signals, and/or different control resource sets (CORESETs).

[0071] The method may then include, at 510, associating one or more of the wake-up signal specific triggering states with a wake-up signaling space and one or more of pre- configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and/or user equipment transmit antenna panels. In an embodiment, the wake-up signaling space may be defined to cover one or more antenna ports associated with the wake-up signaF(s) transmitted simultaneously or separately in time, frequency, code and/or spatial domains. According to some embodiments, the wake-up signal space may be associated with specific triggering states for different downlink or uplink bandwidth parts.

[0072] As depicted in the example of Fig. lOa, the method may also include, at 520, configuring a user equipment with, or transmitting to the user equipment, one or more of the wake-up signal specific triggering state(s) and their association with the wake-up signaling space and the pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and/or user equipment transmit antenna panels.

[0073] According to some embodiments, one or more of the wake-up signal specific triggering states may encapsulate an association with at least one triggering state for the user equipment receiver antenna panels with antenna panel indices and/or at least one triggering state for the user equipment transmit antenna panels with antenna panel indices. In one example, the wake-up signal triggering state for the user equipment receiver antenna panels or the user equipment transmit antenna panels may define a de-activation of set of receiver antenna panels or transmit antenna panels associated with the antenna panel indices and activation of a new set of user equipment receiver antenna panels or user equipment transmit antennal panels with antenna panel indices. In another example, the wake-up signal triggering state for the user equipment receiver antenna panels or the user equipment transmit antenna panels may define the activation of a set of new user equipment receiver antenna panels or user equipment transmit antenna panels associated with antenna panel indices while maintaining current antenna panels as active.

[0074] In some embodiments, one or more of the wake-up signal specific triggering states may encapsulate an association with at least one triggering state for downlink and/or uplink reference signals. According to certain embodiments, the wake-up signal specific triggering states for downlink channel state information reference signal (CSI- RS) may be associated with one or more of: aperiodic Non-Zero-Power (NZP)-CSI- RS resource set(s) with resource(s) enabling measurements for downlink (DL) beam management (BM) that are located within discontinuous reception (DRX) onDuration or paging occasion (PO); aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for downlink (DL) channel measurements located within discontinuous reception (DRX) onDuration or paging occasion (PO); aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for radio link monitoring (RLM) located within discontinuous reception (DRX) onDuration or paging occasion (PO); aperiodic Non-Zero-Power (NZP)-CSI- RS resource set(s) with resource(s) enabling measurements for beam failure detection (BFD) located within discontinuous reception (DRX) onDuration or paging occasion (PO); periodic channel state information reference signal (CSI-RS) resource set(s) with resource(s) enabling measurements for mobility that are outside of OnDuration or paging occasion (PO); aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling interference measurements; and/or aperiodic Zero Power (ZP)- CSI-RS resource set(s) with resource(s) for interference measurements.

[0075] In an embodiment, the wake-up signal specific triggering states for periodic or semi-persistent channel state information interference measurement resource (CSI- IM) set may be associated with resource(s) enabling interference measurements that are outside of OnDuration or paging occasion (PO). According to certain embodiments, the wake-up signal specific triggering states for aperiodic uplink sounding reference signal (SRS) sets may be associated with resources that are located within discontinuous reception (DRX) onDuration or paging occasion (PO) configured. The sounding reference signal (SRS) sets may be configured for one or more of antenna switching, uplink beam management, non-codebook transmission, and/or code -book transmission.

[0076] In some embodiments, the defining 500 may include defining a combination of wake-up signal triggering states for one or more of Non-Zero-Power (NZP) or zero power (ZP) channel state information (CSI) reference signal (RS), channel state information interference measurement resource (CSI-IM), and/or sounding reference signal (SRS) triggering states for different measurements and reporting. According to an embodiment, the associating 510 may include associating one or more of the wake- up signal specific triggering states with one or more of the control resource sets (CORESETs) to enable the monitoring of a physical downlink control channel (PDCCH) associated with multiple transmission points. In a further example embodiment, the associating 510 may include associating one or more of the wake-up signal specific triggering states with uplink signaling preamble resources. [0077] Fig. lOb illustrates an example flow diagram of a method for receiving and/or applying a multi-purpose wake-up signal, according to an example embodiment. In certain example embodiments, the flow diagram of Fig. lOb may be performed by a mobile station, device or UE, associated with a communications system or network, such as a 5G or NR system.

[0078] In an embodiment, the method of Fig. lOb may include, at 550, receiving, from a node in the network, one or more wake-up signal specific triggering states and their associations with a wake-up signaling space and one or more of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and/or user equipment transmit antenna panels.

[0079] The method may also include, at 560, based on the received said at least one wake-up signal specific triggering state and its associations, performing channel state information reference signal resource set based measurements without decoding a physical downlink control channel (PDCCH). In certain embodiments, the performing 560 of the channel state information reference signal resource set based measurements may include performing non-zero-power (NZP) channel state information reference signal resource set based measurements for beam management, channel state information acquisition, or interference measurements during discontinuous reception (DRX) onDuration.

[0080] The method may then include, at 570, reporting results of the measurements to the network node. According to some embodiments, the reporting 570 may include reporting the results of the measurements either within onDuration or outside of onDuration.

[0081] Fig. l la illustrates an example of an apparatus 10 according to an embodiment. In an embodiment, apparatus 10 may be a node, host, or server in a communications network or serving such a network. For example, apparatus 10 may be a base station, a Node B, an evolved Node B (eNB), 5G Node B or access point, next generation Node B (NG-NB or gNB), WLAN access point, mobility management entity (MME), and/or subscription server associated with a radio access network, such as a GSM network, LTE network, 5G or NR. [0082] It should be understood that, in some example embodiments, apparatus 10 may be comprised of an edge cloud server as a distributed computing system where the server and the radio node may be stand-alone apparatuses communicating with each other via a radio path or via a wired connection, or they may be located in a same entity communicating via a wired connection. For instance, in certain example embodiments where apparatus 10 represents a gNB, it may be configured in a central unit (CU) and distributed unit (DU) architecture that divides the gNB functionality. In such an architecture, the CU may be a logical node that includes gNB functions such as transfer of user data, mobility control, radio access network sharing, positioning, and/or session management, etc. The CU may control the operation of DU(s) over a front-haul interface. The DU may be a logical node that includes a subset of the gNB functions, depending on the functional split option. It should be noted that one of ordinary skill in the art would understand that apparatus 10 may include components or features not shown in Fig. 11a.

[0083] As illustrated in the example of Fig. 11a, apparatus 10 may include a processor 12 for processing information and executing instructions or operations. Processor 12 may be any type of general or specific purpose processor. In fact, processor 12 may include one or more of general-purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), and processors based on a multi-core processor architecture, as examples. While a single processor 12 is shown in Fig. 11a, multiple processors may be utilized according to other embodiments. For example, it should be understood that, in certain embodiments, apparatus 10 may include two or more processors that may form a multiprocessor system (e.g., in this case processor 12 may represent a multiprocessor) that may support multiprocessing. In certain embodiments, the multiprocessor system may be tightly coupled or loosely coupled (e.g., to form a computer cluster).

[0084] Processor 12 may perform functions associated with the operation of apparatus 10, which may include, for example, precoding of antenna gain/phase parameters, encoding and decoding of individual bits forming a communication message, formatting of information, and overall control of the apparatus 10, including processes related to management of communication resources.

[0085] Apparatus 10 may further include or be coupled to a memory 14 (internal or external), which may be coupled to processor 12, for storing information and instructions that may be executed by processor 12. Memory 14 may be one or more memories and of any type suitable to the local application environment, and may be implemented using any suitable volatile or nonvolatile data storage technology such as a semiconductor-based memory device, a magnetic memory device and system, an optical memory device and system, fixed memory, and/or removable memory. For example, memory 14 can be comprised of any combination of random access memory (RAM), read only memory (ROM), static storage such as a magnetic or optical disk, hard disk drive (HDD), or any other type of non-transitory machine or computer readable media. The instructions stored in memory 14 may include program instructions or computer program code that, when executed by processor 12, enable the apparatus 10 to perform tasks as described herein.

[0086] In an embodiment, apparatus 10 may further include or be coupled to (internal or external) a drive or port that is configured to accept and read an external computer readable storage medium, such as an optical disc, USB drive, flash drive, or any other storage medium. For example, the external computer readable storage medium may store a computer program or software for execution by processor 12 and/or apparatus 10.

[0087] In some embodiments, apparatus 10 may also include or be coupled to one or more antennas 15 for transmitting and receiving signals and/or data to and from apparatus 10. Apparatus 10 may further include or be coupled to a transceiver 18 configured to transmit and receive information. The transceiver 18 may include, for example, a plurality of radio interfaces that may be coupled to the antenna(s) 15. The radio interfaces may correspond to a plurality of radio access technologies including one or more of GSM, NB-IoT, LTE, 5G, WLAN, Bluetooth, BT-LE, NFC, radio frequency identifier (RFID), ultrawideband (UWB), MulteFire, and the like. The radio interface may include components, such as filters, converters (for example, digital-to- analog converters and the like), mappers, a Fast Fourier Transform (FFT) module, and the like, to generate symbols for a transmission via one or more downlinks and to receive symbols (for example, via an uplink).

[0088] As such, transceiver 18 may be configured to modulate information on to a carrier waveform for transmission by the antenna(s) 15 and demodulate information received via the antenna(s) 15 for further processing by other elements of apparatus 10. In other embodiments, transceiver 18 may be capable of transmitting and receiving signals or data directly. Additionally or alternatively, in some embodiments, apparatus 10 may include an input and/or output device (I/O device).

[0089] In an embodiment, memory 14 may store software modules that provide functionality when executed by processor 12. The modules may include, for example, an operating system that provides operating system functionality for apparatus 10. The memory may also store one or more functional modules, such as an application or program, to provide additional functionality for apparatus 10. The components of apparatus 10 may be implemented in hardware, or as any suitable combination of hardware and software.

[0090] According to some embodiments, processor 12 and memory 14 may be included in or may form a part of processing circuitry or control circuitry. In addition, in some embodiments, transceiver 18 may be included in or may form a part of transceiving circuitry.

[0091] As used herein, the term“circuitry” may refer to hardware-only circuitry implementations (e.g., analog and/or digital circuitry), combinations of hardware circuits and software, combinations of analog and/or digital hardware circuits with software/firmware, any portions of hardware processor(s) with software (including digital signal processors) that work together to case an apparatus (e.g., apparatus 10) to perform various functions, and/or hardware circuit(s) and/or processor(s), or portions thereof, that use software for operation but where the software may not be present when it is not needed for operation. As a further example, as used herein, the term “circuitry” may also cover an implementation of merely a hardware circuit or processor (or multiple processors), or portion of a hardware circuit or processor, and its accompanying software and/or firmware. The term circuitry may also cover, for example, a baseband integrated circuit in a server, cellular network node or device, or other computing or network device.

[0092] As introduced above, in certain embodiments, apparatus 10 may be a network node or RAN node, such as a base station, access point, Node B, eNB, gNB, WLAN access point, or the like. According to certain embodiments, apparatus 10 may be controlled by memory 14 and processor 12 to perform the functions associated with any of the embodiments described herein, such as the flow or signaling diagrams illustrated in Figs. lOa or lOb. In some embodiments, apparatus 10 may be configured to perform a procedure for providing a multi-purpose wake-up signal

[0093] For instance, in one embodiment, apparatus 10 may be controlled by memory 14 and processor 12 to define a plurality of different triggering states for a wake-up signal (i.e., defining wake-up signal specific triggering states). According to an embodiment, apparatus 10 may be controlled by memory 14 and processor 12 to define combined use of the wake-up signal specific triggering states for one or more of different pre- configured bandwidth parts, triggering states for downlink and uplink reference signals, and/or different control resource sets (CORESETs).

[0094] According to an embodiment, apparatus 10 may be controlled by memory 14 and processor 12 to associate one or more of the wake-up signal specific triggering states with a wake-up signaling space and one or more of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and/or user equipment transmit antenna panels. In an embodiment, the wake-up signaling space may be defined to cover one or more antenna ports associated with the wake-up signaF(s) transmitted simultaneously or separately in time, frequency, code and/or spatial domains. According to some embodiments, the wake- up signal space may be associated with specific triggering states for different downlink or uplink bandwidth parts.

[0095] In one embodiment, apparatus 10 may be controlled by memory 14 and processor 12 to configure a user equipment with, or transmit to the user equipment, one or more of the wake-up signal specific triggering state(s) and their association with the wake- up signaling space and the pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and/or user equipment transmit antenna panels.

[0096] According to some embodiments, one or more of the wake-up signal specific triggering states may encapsulate an association with at least one triggering state for the user equipment receiver antenna panels with antenna panel indices and/or at least one triggering state for the user equipment transmit antenna panels with antenna panel indices. In one example, the wake-up signal triggering state for the user equipment receiver antenna panels or the user equipment transmit antenna panels may define a de-activation of set of receiver antenna panels or transmit antenna panels associated with the antenna panel indices and activation of a new set of user equipment receiver antenna panels or user equipment transmit antennal panels with antenna panel indices. In another example, the wake-up signal triggering state for the user equipment receiver antenna panels or the user equipment transmit antenna panels may define the activation of a set of new user equipment receiver antenna panels or user equipment transmit antenna panels associated with antenna panel indices while maintaining current antenna panels as active.

[0097] In some embodiments, one or more of the wake-up signal specific triggering states may encapsulate an association with at least one triggering state for downlink and/or uplink reference signals. According to certain embodiments, apparatus 10 may be controlled by memory 14 and processor 12 to associate the wake-up signal specific triggering states for downlink channel state information reference signal (CSI-RS) with one or more of: aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for downlink (DL) beam management (BM) that are located within discontinuous reception (DRX) onDuration or paging occasion (PO); aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for downlink (DL) channel measurements located within discontinuous reception (DRX) onDuration or paging occasion (PO); aperiodic Non- Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for radio link monitoring (RLM) located within discontinuous reception (DRX) onDuration or paging occasion (PO); aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for beam failure detection (BFD) located within discontinuous reception (DRX) onDuration or paging occasion (PO); periodic channel state information reference signal (CSI-RS) resource set(s) with resource(s) enabling measurements for mobility that are outside of OnDuration or paging occasion (PO); aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling interference measurements; and/or aperiodic Zero Power (ZP)- CSI-RS resource set(s) with resource(s) for interference measurements.

[0098] In an embodiment, apparatus 10 may be controlled by memory 14 and processor 12 to associate the wake-up signal specific triggering states for periodic or semi-persistent channel state information interference measurement resource (CSI-IM) set with resource(s) enabling interference measurements that are outside of OnDuration or paging occasion (PO). According to certain embodiments, apparatus 10 may be controlled by memory 14 and processor 12 to associate the wake-up signal specific triggering states for aperiodic uplink sounding reference signal (SRS) sets with resources located within discontinuous reception (DRX) OnDuration or paging occasion (PO) configured. The sounding reference signal (SRS) sets may be configured for one or more of antenna switching, uplink beam management, non- codebook transmission, and/or code -book transmission.

[0099] In some embodiments, apparatus 10 may be controlled by memory 14 and processor 12 to define a combination of wake-up signal triggering states for one or more of Non-Zero-Power (NZP) or zero power (ZP) channel state information (CSI) reference signal (RS), channel state information interference measurement resource (CSI-IM), and/or sounding reference signal (SRS) triggering states for different measurements and reporting. According to an embodiment, apparatus 10 may be controlled by memory 14 and processor 12 to associate one or more of the wake-up signal specific triggering states with one or more of the control resource sets (CORESETs) to enable the monitoring of a physical downlink control channel (PDCCH) associated with multiple transmission points. In a further example embodiment, apparatus 10 may be controlled by memory 14 and processor 12 to associate one or more of the wake-up signal specific triggering states with uplink signaling preamble resources.

[00100] Fig. l ib illustrates an example of an apparatus 20 according to another embodiment. In an embodiment, apparatus 20 may be a node or element in a communications network or associated with such a network, such as a UE, mobile equipment (ME), mobile station, mobile device, stationary device, IoT device, or other device. As described herein, UE may alternatively be referred to as, for example, a mobile station, mobile equipment, mobile unit, mobile device, user device, subscriber station, wireless terminal, tablet, smart phone, IoT device or NB-IoT device, or the like. As one example, apparatus 20 may be implemented in, for instance, a wireless handheld device, a wireless plug-in accessory, or the like.

[00101] In some example embodiments, apparatus 20 may include one or more processors, one or more computer-readable storage medium (for example, memory, storage, or the like), one or more radio access components (for example, a modem, a transceiver, or the like), and/or a user interface. In some embodiments, apparatus 20 may be configured to operate using one or more radio access technologies, such as GSM, LTE, LTE-A, NR, 5G, WLAN, WiFi, NB-IoT, Bluetooth, NFC, MulteFire, and/or any other radio access technologies. It should be noted that one of ordinary skill in the art would understand that apparatus 20 may include components or features not shown in Fig. 1 lb.

[00102] As illustrated in the example of Fig. 1 lb, apparatus 20 may include or be coupled to a processor 22 for processing information and executing instructions or operations. Processor 22 may be any type of general or specific purpose processor. In fact, processor 22 may include one or more of general-purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), field- programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), and processors based on a multi-core processor architecture, as examples. While a single processor 22 is shown in Fig. l lb, multiple processors may be utilized according to other embodiments. For example, it should be understood that, in certain embodiments, apparatus 20 may include two or more processors that may form a multiprocessor system (e.g., in this case processor 22 may represent a multiprocessor) that may support multiprocessing. In certain embodiments, the multiprocessor system may be tightly coupled or loosely coupled (e.g., to form a computer cluster).

[00103] Processor 22 may perform functions associated with the operation of apparatus 20 including, as some examples, precoding of antenna gain/phase parameters, encoding and decoding of individual bits forming a communication message, formatting of information, and overall control of the apparatus 20, including processes related to management of communication resources.

[00104] Apparatus 20 may further include or be coupled to a memory 24 (internal or external), which may be coupled to processor 22, for storing information and instructions that may be executed by processor 22. Memory 24 may be one or more memories and of any type suitable to the local application environment, and may be implemented using any suitable volatile or nonvolatile data storage technology such as a semiconductor-based memory device, a magnetic memory device and system, an optical memory device and system, fixed memory, and/or removable memory. For example, memory 24 can be comprised of any combination of random access memory (RAM), read only memory (ROM), static storage such as a magnetic or optical disk, hard disk drive (HDD), or any other type of non-transitory machine or computer readable media. The instructions stored in memory 24 may include program instructions or computer program code that, when executed by processor 22, enable the apparatus 20 to perform tasks as described herein.

[00105] In an embodiment, apparatus 20 may further include or be coupled to (internal or external) a drive or port that is configured to accept and read an external computer readable storage medium, such as an optical disc, USB drive, flash drive, or any other storage medium. For example, the external computer readable storage medium may store a computer program or software for execution by processor 22 and/or apparatus 20.

[00106] In some embodiments, apparatus 20 may also include or be coupled to one or more antennas 25 for receiving a downlink signal and for transmitting via an uplink from apparatus 20. Apparatus 20 may further include a transceiver 28 configured to transmit and receive information. The transceiver 28 may also include a radio interface (e.g., a modem) coupled to the antenna 25. The radio interface may correspond to a plurality of radio access technologies including one or more of GSM, LTE, LTE-A, 5G, NR, WLAN, NB-IoT, Bluetooth, BT-LE, NFC, RFID, UWB, and the like. The radio interface may include other components, such as filters, converters (for example, digital-to-analog converters and the like), symbol demappers, signal shaping components, an Inverse Fast Fourier Transform (IFFT) module, and the like, to process symbols, such as OFDMA symbols, carried by a downlink or an uplink.

[00107] For instance, transceiver 28 may be configured to modulate information on to a carrier waveform for transmission by the antenna(s) 25 and demodulate information received via the antenna(s) 25 for further processing by other elements of apparatus 20. In other embodiments, transceiver 28 may be capable of transmitting and receiving signals or data directly. Additionally or alternatively, in some embodiments, apparatus 10 may include an input and/or output device (I/O device). In certain embodiments, apparatus 20 may further include a user interface, such as a graphical user interface or touchscreen.

[00108] In an embodiment, memory 24 stores software modules that provide functionality when executed by processor 22. The modules may include, for example, an operating system that provides operating system functionality for apparatus 20. The memory may also store one or more functional modules, such as an application or program, to provide additional functionality for apparatus 20. The components of apparatus 20 may be implemented in hardware, or as any suitable combination of hardware and software. According to an example embodiment, apparatus 20 may optionally be configured to communicate with apparatus 10 via a wireless or wired communications link 70 according to any radio access technology, such as NR.

[00109] According to some embodiments, processor 22 and memory 24 may be included in or may form a part of processing circuitry or control circuitry. In addition, in some embodiments, transceiver 28 may be included in or may form a part of transceiving circuitry.

[00110] As discussed above, according to some embodiments, apparatus 20 may be a UE, mobile device, mobile station, ME, IoT device and/or NB-IoT device, for example. According to certain embodiments, apparatus 20 may be controlled by memory 24 and processor 22 to perform the functions associated with example embodiments described herein. For example, in some embodiments, apparatus 20 may be configured to perform one or more of the processes depicted in any of the flow charts or signaling diagrams described herein, such as the flow diagrams illustrated in Figs. 10a or 10b. For example, in certain embodiments, apparatus 20 may be configured to perform a procedure for receiving and/or applying a multi-purpose wake- up signal.

[00111] According to some embodiments, apparatus 20 may be controlled by memory 24 and processor 22 to receive, from a node in the network, one or more wake- up signal specific triggering states and their associations with a wake-up signaling space and one or more of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and/or user equipment transmit antenna panels.

[00112] In certain embodiments, based on the received said at least one wake-up signal specific triggering state and its associations, apparatus 20 may be controlled by memory

24 and processor 22 to perform channel state information reference signal resource set based measurements without decoding a physical downlink control channel (PDCCH). In certain embodiments, apparatus 20 may be controlled by memory 24 and processor 22 to perform non-zero-power (NZP) channel state information reference signal resource set based measurements for beam management, channel state information acquisition, or interference measurements during discontinuous reception (DRX) onDuration.

[00113] According to an embodiment, apparatus 20 may be controlled by memory 24 and processor 22 to report results of the measurements to the network node. In some embodiments, the results of the measurements may be reported either within onDuration or outside of onDuration.

[0100] Therefore, certain example embodiments provide several technical improvements, enhancements, and/or advantages. For example, certain embodiments provide methods facilitating multi-purpose wake-up signal(s) in NR. As a result of some embodiments, UE power efficiency is enhanced (e.g., especially above 6GHz) For example, some embodiments may enable triggering of a UE or group of UE specific functionalities, such as measurements, reporting, band-width part switching, the monitoring of different CORESETs, activation/de-activation of UE TX/RX antenna panels, to be performed at UE side without need of power hungry PDCCH monitoring. As such, example embodiments may improve power efficiency, performance, latency, and/or throughput of networks and network nodes including, for example, access points, base stations/eNBs/gNBs, and mobile devices or UEs. Accordingly, the use of certain example embodiments results in improved functioning of communications networks and their nodes.

[0101] In some example embodiments, the functionality of any of the methods, processes, signaling diagrams, algorithms or flow charts described herein may be implemented by software and/or computer program code or portions of code stored in memory or other computer readable or tangible media, and executed by a processor.

[0102] In some example embodiments, an apparatus may be included or be associated with at least one software application, module, unit or entity configured as arithmetic operation(s), or as a program or portions of it (including an added or updated software routine), executed by at least one operation processor. Programs, also called program products or computer programs, including software routines, applets and macros, may be stored in any apparatus-readable data storage medium and include program instructions to perform particular tasks.

[0103] A computer program product may comprise one or more computer- executable components which, when the program is run, are configured to carry out some example embodiments. The one or more computer-executable components may be at least one software code or portions of it. Modifications and configurations required for implementing functionality of an example embodiment may be performed as routine(s), which may be implemented as added or updated software routine(s). Software routine(s) may be downloaded into the apparatus.

[0104] As an example, software or a computer program code or portions of it may be in a source code form, object code form, or in some intermediate form, and it may be stored in some sort of carrier, distribution medium, or computer readable medium, which may be any entity or device capable of carrying the program. Such carriers may include a record medium, computer memory, read-only memory, photoelectrical and/or electrical carrier signal, telecommunications signal, and software distribution package, for example. Depending on the processing power needed, the computer program may be executed in a single electronic digital computer or it may be distributed amongst a number of computers. The computer readable medium or computer readable storage medium may be a non- transitory medium. [0105] In other example embodiments, the functionality may be performed by hardware or circuitry included in an apparatus (e.g., apparatus 10 or apparatus 20), for example through the use of an application specific integrated circuit (ASIC), a programmable gate array (PGA), a field programmable gate array (FPGA), or any other combination of hardware and software. In yet another example embodiment, the functionality may be implemented as a signal, a non-tangible means that can be carried by an electromagnetic signal downloaded from the Internet or other network.

[0106] According to an example embodiment, an apparatus, such as a node, device, or a corresponding component, may be configured as circuitry, a computer or a microprocessor, such as single-chip computer element, or as a chipset, including at least a memory for providing storage capacity used for arithmetic operation and an operation processor for executing the arithmetic operation.

[0107] One having ordinary skill in the art will readily understand that the example embodiments as discussed above may be practiced with steps in a different order, and/or with hardware elements in configurations which are different than those which are disclosed. Therefore, although some embodiments have been described based upon these example preferred embodiments, it would be apparent to those of skill in the art that certain modifications, variations, and alternative constructions would be apparent, while remaining within the spirit and scope of example embodiments. In order to determine the metes and bounds of the example embodiments, therefore, reference should be made to the appended claims.

Claims

WE CLAIM:

1. An apparatus, comprising:

at least one processor; and

at least one memory comprising computer program code,

the at least one memory and computer program code configured, with the at least one processor, to cause the apparatus at least to

define a plurality of different triggering states for a wake-up signal;

associate at least one of the wake-up signal specific triggering states with a wake-up signaling space and at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels;

configure a user equipment with said at least one of the wake-up signal specific triggering states and their association with the wake-up signaling space and said at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels.

2. The apparatus according to claim 1, wherein the wake-up signaling space is defined to cover one or more antenna ports associated with the wake-up signal transmitted simultaneously or separately in time, frequency, code and spatial domains.

3. The apparatus according to claims 1 or 2, wherein at least one of the wake-up signal specific triggering states encapsulates an association with at least one triggering state for the user equipment receiver antenna panels with antenna panel indices and/or at least one triggering state for the user equipment transmit antenna panels with antenna panel indices.

4. The apparatus according to claim 3, wherein:

the wake-up signal triggering state for the user equipment receiver antenna panels or the user equipment transmit antenna panels define a de-activation of set of receiver antenna panels or transmit antenna panels associated with the antenna panel indices and activation of a new set of user equipment receiver antenna panels or user equipment transmit antennal panels with antenna panel indices; or

the wake-up signal triggering state for the user equipment receiver antenna panels or the user equipment transmit antenna panels define the activation of a set of new user equipment receiver antenna panels or user equipment transmit antenna panels associated with antenna panel indices while maintaining current antenna panels as active.

5. The apparatus according to claims 1 or 2, wherein at least one of the wake-up signal specific triggering states encapsulates an association with at least one triggering state for downlink and/or uplink reference signals.

6. The apparatus according to claim 5, wherein wake-up signal specific triggering states for downlink channel state information reference signal (CSI-RS) are associated with at least one of:

aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for downlink (DL) beam management (BM) that are located within discontinuous reception (DRX) onDuration or paging occasion (PO);

aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for downlink (DL) channel measurements located within discontinuous reception (DRX) onDuration or paging occasion (PO);

aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for radio link monitoring (RLM) located within discontinuous reception (DRX) onDuration or paging occasion (PO); aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for beam failure detection (BFD) located within discontinuous reception (DRX) onDuration or paging occasion (PO); periodic channel state information reference signal (CSI-RS) resource set(s) with resource(s) enabling measurements for mobility that are outside of

OnDuration or paging occasion (PO); aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling interference measurements; and

aperiodic Zero Power (ZP)-CSI-RS resource set(s) with resource(s) for interference measurements.

7. The apparatus according to claim 5, wherein wake-up signal specific triggering states for periodic or semi-persistent channel state information interference measurement resource (CSI-IM) set are associated with resource(s) enabling interference measurements that are outside of OnDuration or paging occasion (PO).

8. The apparatus according to claim 5, wherein wake-up signal specific triggering states for aperiodic uplink sounding reference signal (SRS) sets are associated with resources are located within discontinuous reception (DRX) onDuration or paging occasion (PO) configured, wherein the sounding reference signal (SRS) sets are configured for at least one of antenna switching, uplink beam management, non- codebook transmission, and code -book transmission.

9. The apparatus according to any one of claims 1-8, wherein the at least one memory and computer program code are further configured, with the at least one processor, to cause the apparatus at least to:

define a combination of wake-up signal triggering states for at least one of Non- Zero-Power (NZP) or zero power (ZP) channel state information (CSI) reference signal (RS), channel state information interference measurement resource (CSI-IM), and sounding reference signal (SRS) triggering states for different measurements and reporting.

10. The apparatus according to claims 1 or 2, wherein the at least one memory and computer program code are further configured, with the at least one processor, to cause the apparatus at least to associate said at least one of the wake-up signal specific triggering states with one or more of the control resource sets (CORESETs) to enable the monitoring of a physical downlink control channel (PDCCH) associated with multiple transmission points.

1 1. The apparatus according to claims 1 or 2, wherein the at least one memory and computer program code are further configured, with the at least one processor, to cause the apparatus at least to associate said at least one of the wake-up signal specific triggering states with uplink signaling preamble resources.

12. The apparatus according to claims 1 or 2, wherein the wake-up signal space is associated with specific triggering states for different downlink or uplink bandwidth parts.

13. The apparatus according to claims 1 or 2, wherein the at least one memory and computer program code are further configured, with the at least one processor, to cause the apparatus at least to define combined use of the wake-up signal specific triggering states for at least one of: different pre-configured bandwidth parts, triggering states for downlink and uplink reference signals, and different control resource sets (CORESETs).

14. A method, comprising:

defining, by a network node, a plurality of different triggering states for a wake-up signal;

associating at least one of the wake-up signal specific triggering states with a wake- up signaling space and at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels; and

configuring a user equipment with said at least one of the wake-up signal specific triggering states and their association with the wake-up signaling space and said at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels.

15. The method according to claim 14, wherein the wake-up signaling space is defined to cover one or more antenna ports associated with the wake-up signal transmitted simultaneously or separately in time, frequency, code and spatial domains.

16. The method according to claims 14 or 15, wherein at least one of the wake-up signal specific triggering states encapsulates an association with at least one triggering state for the user equipment receiver antenna panels with antenna panel indices and/or at least one triggering state for the user equipment transmit antenna panels with antenna panel indices.

17. The method according to claim 16, wherein:

18. The method according to claims 14 or 15, wherein at least one of the wake-up signal specific triggering states encapsulates an association with at least one triggering state for downlink and/or uplink reference signals.

19. The method according to claim 18, wherein wake-up signal specific triggering states for downlink channel state information reference signal (CSI-RS) are associated with at least one of:

aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for downlink (DL) beam management (BM) that are located within discontinuous reception (DRX) onDuration or paging occasion (PO); aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for downlink (DL) channel measurements located within discontinuous reception (DRX) onDuration or paging occasion (PO);

aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for radio link monitoring (RLM) located within discontinuous reception (DRX) onDuration or paging occasion (PO); aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling measurements for beam failure detection (BFD) located within discontinuous reception (DRX) onDuration or paging occasion (PO); periodic channel state information reference signal (CSI-RS) resource set(s) with resource(s) enabling measurements for mobility that are outside of OnDuration or paging occasion (PO);

aperiodic Non-Zero-Power (NZP)-CSI-RS resource set(s) with resource(s) enabling interference measurements; and

20. The method according to claim 18, wherein wake-up signal specific triggering states for periodic or semi-persistent channel state information interference measurement resource (CSI-IM) set are associated with resource(s) enabling interference measurements that are outside of OnDuration or paging occasion (PO).

21. The method according to claim 18, wherein wake-up signal specific triggering states for aperiodic uplink sounding reference signal (SRS) sets are associated with resources are located within discontinuous reception (DRX) onDuration or paging occasion (PO) configured, wherein the sounding reference signal (SRS) sets are configured for at least one of antenna switching, uplink beam management, non- codebook transmission, and code -book transmission.

22. The method according to any one of claims 14-21, further comprising: defining a combination of wake-up signal triggering states for at least one of Non-Zero-Power (NZP) or zero power (ZP) channel state information (CSI) reference signal (RS), channel state information interference measurement resource (CSI-IM), and sounding reference signal (SRS) triggering states for different measurements and reporting.

23. The method according to claims 14 or 15, wherein the associating further comprises associating said at least one of the wake-up signal specific triggering states with one or more of the control resource sets (CORESETs) to enable the monitoring of a physical downlink control channel (PDCCH) associated with multiple transmission points.

24. The method according to claims 14 or 15, wherein the associating further comprises associating said at least one of the wake-up signal specific triggering states with uplink signaling preamble resources.

25. The method according to claims 14 or 15, wherein the wake-up signal space is associated with specific triggering states for different downlink or uplink bandwidth parts.

26. The method according to claims 14 or 15, wherein the defining further comprises defining combined use of the wake-up signal specific triggering states for at least one of: different pre-configured bandwidth parts, triggering states for downlink and uplink reference signals, and different control resource sets (CORESETs).

27. An apparatus, comprising:

means for defining a plurality of different triggering states for a wake-up signal; means for associating at least one of the wake-up signal specific triggering states with a wake-up signaling space and at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels; and means for configuring a user equipment with said at least one of the wake-up signal specific triggering states and their association with the wake-up signaling space and said at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels.

28. An apparatus, comprising:

at least one processor; and

at least one memory comprising computer program code,

receive, from a network node, at least one wake-up signal specific triggering state and its associations with a wake-up signaling space and at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels;

based on the received said at least one wake-up signal specific triggering state and its associations, perform channel state information reference signal resource set based measurements without decoding a physical downlink control channel; and

report results of the measurements to the network node.

29. The apparatus according to claim 28, wherein the at least one memory and computer program code are further configured, with the at least one processor, to cause the apparatus at least to perform non-zero-power (NZP) channel state information reference signal resource set based measurements for beam management, channel state information acquisition, or interference measurements during discontinuous reception (DRX) onDuration.

30. The apparatus according to claims 28 or 29, wherein the at least one memory and computer program code are further configured, with the at least one processor, to cause the apparatus at least to report the results of the measurements either within onDuration or outside of onDuration.

31. A method, comprising:

receiving, from a network node, at least one wake-up signal specific triggering state and its associations with a wake-up signaling space and at least one of pre-configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels;

based on the received said at least one wake-up signal specific triggering state and its associations, performing channel state information reference signal resource set based measurements without decoding a physical downlink control channel; and

reporting results of the measurements to the network node.

32. The method according to claim 31, wherein the performing of the channel state information reference signal resource set based measurements further comprising performing non-zero-power (NZP) channel state information reference signal resource set based measurements for beam management, channel state information acquisition, or interference measurements during discontinuous reception (DRX) onDuration.

33. The method according to claims 31 or 32, wherein the reporting further comprises reporting the results of the measurements either within onDuration or outside of onDuration.

34. An apparatus, comprising:

means for receiving, from a network node, at least one wake-up signal specific triggering state and its associations with a wake-up signaling space and at least one of pre- configured uplink and downlink reference signal configurations, control resource sets (CORESETs), bandwidth parts, user equipment receiver antenna panels, and user equipment transmit antenna panels;

based on the received said at least one wake-up signal specific triggering state and its associations, means for performing channel state information reference signal resource set based measurements without decoding a physical downlink control channel; and means for reporting results of the measurements to the network node.

35. A computer readable medium comprising program instructions stored thereon for performing the method according to any one of claims 14-26 or 31-33.