A method, performed by a network node, for enabling low power operation of a wireless device, a related network node, and a related wireless device.

Abstract

Disclosed is a method, performed by a network node, for enabling low power operation of a wireless device. The method comprises transmitting, to a first wireless device, information indicative of a configuration. The configuration identifies time-frequency resources for the first wireless device to monitor for one or more low power wake-up signal, LP-WUS, sequences. The method comprises transmitting, to the first wireless device, a LP-WUS according to the configuration, such as a first LP-WUS. The LP-WUS comprises a first sequence from a set of sequences. Each sequence of the set of sequences is associated with a pre-determined intended activity. The first sequence is configured to trigger a first activity of the first wireless device.

Description

[0001] A METHOD, PERFORMED BY A NETWORK NODE, FOR ENABLING LOW POWER OPERATION OF A WIRELESS DEVICE, A RELATED NETWORK NODE, AND A RELATED WIRELESS DEVICE.

[0002] The present disclosure pertains to the field of wireless communications. The present disclosure relates to a method for enabling low power operation of a wireless device, a related network node, and a related wireless device.

[0003] BACKGROUND

[0004] Battery technology, including power management and efficiency, is an area of technology that continues to evolve as devices become increasingly powerful and present in daily life. One of the challenges faced in battery technology is the efficient utilization of energy within wireless devices, such as user equipment, UE, specifically those with small rechargeable or single coin cell batteries. Wearables such as smartwatches, rings, and medical monitoring devices, require these batteries that may or may not be rechargeable and may still be expected to last a few years. Typical battery capacity is strained to meet the current demands of these devices.

[0005] One proposed way to save power and improve battery life is the configuration of wireless devices to periodically wake up and monitor for potential demands, e.g., using discontinuous reception scheme, DRX. Variations of this solution have resulted in the creation of various “modes” in which the wireless device may exist, including “connected” and “idle” mode, with differing states of activity and power consumption associated with each mode. Furthermore, another way to save power and improve battery life is by using wake-up signal and / or wake-up receiver for the wireless device in “idle” mode. However, several challenges remain in implementation of these approaches to further improve energy efficiency, particularly in a system that supports wake-up signal and / or wake-up receiver in various “modes” above.

[0006] SUMMARY

[0007] Accordingly, there is a need for devices and methods for enabling low power operation of a wireless device, such as UE, which may mitigate, alleviate or address the shortcomings existing and may provide improved low power operation of wireless devices.

[0008] Disclosed is a method, performed by a network node, for enabling low power operation of a wireless device, such as a first wireless device as disclosed herein. The method comprises transmitting, to a first wireless device, information indicative of a configuration. The configuration identifies time-frequency resources for the first wireless device to monitor for one or more low power wake-up signal, LP-WUS, sequences. The method comprises transmitting, to the first wireless device, a LP-WUS according to the configuration, such as a first LP-WUS. The LP-WUS comprises a first sequence from a set of sequences. Each sequence of the set of sequences is associated with a pre-determined intended activity. The first sequence is configured to trigger a first activity of the first wireless device. The sequences may be modulated using on-off keying (OOK) or binary frequency shift keying allowing / enabling by low-power low-complexity receiver design for its reception.

[0009] Further, a network node comprising memory circuitry, processor circuitry, and a wireless interface is provided. The network node is configured to perform any of the methods performed in a network node as disclosed herein.

[0010] It is an advantage of the present disclosure that the disclosed method and network node enable low power operation of a wireless device. It may be appreciated that the disclosed method and network node propose a new signal configuration for low power wake-up purpose. The present disclosure allows to improve the energy saving and energy efficiency of wireless telecommunication systems, such as improve the energy saving and energy efficiency of wireless devices. For example, the present method and network node enable wireless devices to monitor time-frequency resources in a more energy efficient manner. Furthermore, it is an advantage of the present method and network node that different sequences, such as different LP-WUS comprising different sequences, can be used for different subsequent intended activities of a wireless device. For example, different sequences may be used to trigger different activities of a wireless device. For example, the present disclosure provides sequences with good correlation properties which are used to allow for good detection performance, i.e., low wake-up miss- detection and false-alarm probabilities. Further, the presently disclosed WUS structure may accommodate information related to a wake-up indication, an intention for a subsequent activity after the wake-up, and / or target wireless device(s) (such as UE / UEs). In other words, the presently disclosed signal configuration (such as design) for Low power wake-up purpose may define sequences that are constructed so that the receiving device (such as wireless device) can identify at least a wake-up indication, an intention for a subsequent activity after the wake-up, and / or target wireless device.

[0011] Disclosed is a method, performed by a first wireless device, for enabling lower power operation. The method comprises receiving, from a network node, information indicative of a configuration. The configuration identifies time-frequency resources for the first wireless device to monitor for one or more LP-WUS sequences. The method comprises monitoring the time-frequency resources according to the configuration to detect whether one or more LP-WUS sequences are received. The method comprises receiving, from the network node, a LP-WUS according to the configuration. The LP-WUS comprises a first sequence from a set of sequences. Each sequence of the set of sequences is associated with a pre-determined intended activity. The first sequence is configured to trigger a first activity of the first wireless device.

[0012] Further, a first wireless device comprising memory circuitry, processor circuitry, and a wireless interface is provided. The first wireless device is configured to perform any of the methods performed in a first wireless device as disclosed herein.

[0013] It is an advantage of the present disclosure that the disclosed method and wireless device enable low power operation of a wireless device. It may be appreciated that the disclosed method and wireless device enable the use of a proposed new signal configuration for low power wake-up purpose. The present disclosure allows to improve the energy saving and energy efficiency of wireless telecommunication systems, such as improve the energy saving and energy efficiency of wireless devices. For example, the present method and wireless device enable a wireless device to monitor time-frequency resources in a more energy efficient manner. Furthermore, it is an advantage of the present method and wireless device that different sequences, such as different LP-WUS comprising different sequences, can be used for different subsequent intended activities of a wireless device. For example, different sequences may be used to trigger different activities of a wireless device.

[0014] BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and other features and advantages of the present disclosure will become readily apparent to those skilled in the art by the following detailed description of examples thereof with reference to the attached drawings, in which:

[0016] Fig. 1 is a diagram illustrating an example wireless communication system comprising an example network node, an example first wireless device, and an example second wireless device according to this disclosure,

[0017] Figs. 2A-2B is a flow-chart illustrating an example method, performed in a network node of a wireless communication system, for enabling low power operation of a wireless device, according to this disclosure,

[0018] Fig. 3 is a flow-chart illustrating an example method, performed in a first wireless device of a wireless communication system, for enabling low power operation, according to this disclosure, Fig. 4 is a block diagram illustrating an example network node according to this disclosure, Fig. 5 is a block diagram illustrating an example first wireless device according to this disclosure, Fig. 6 illustrates an example scenario where an example technique as disclosed herein is applied, and

[0019] Fig. 7 shows a signaling diagram where a technique as disclosed herein is applied. DETAILED DESCRIPTION

[0020] Various examples and details are described hereinafter, with reference to the figures when relevant. It should be noted that the figures may or may not be drawn to scale and that elements of similar structures or functions are represented by like reference numerals throughout the figures. It should also be noted that the figures are only intended to facilitate the description of the examples. They are not intended as an exhaustive description of the disclosure or as a limitation on the scope of the disclosure. In addition, an illustrated example needs not have all the aspects or advantages shown. An aspect or an advantage described in conjunction with a particular example is not necessarily limited to that example and can be practiced in any other examples even if not so illustrated, or if not so explicitly described.

[0021] A connected mode may be referred to an operation mode wherein a data transmission can be communicated e.g. between a wireless device and a network node or between the wireless device and another wireless device. A connected mode may be referred to an operation state wherein a radio transmitter and / or a radio receiver is activated for such communication. A connected mode may be referred to an operation state wherein the wireless device is synchronized time-wise and / or frequency-wise e.g. by a determined timing advance parameter for the communication. In certain communication systems, a connected mode may be referred to a radio resource control (RRC) state. In various examples, an active state may be a RRC connected state and / or an RRC active state. However, a connected mode may be an active period within another RRC state.

[0022] The dormant mode is a mode where the wireless device, such as UE, has no active connection with the network node. A dormant mode may be seen as an inactive mode of the wireless device. A dormant mode may be seen as a mode where the wireless device is unsynchronized with a timing of a network. In one or many examples the wireless device may in a dormant mode not have a valid timing advance information with respect to the network. A dormant mode may be seen as a mode where the wireless device is unable to receive dedicated signaling. A dormant mode may be seen as a mode where closed loop power control is inactivated or suspended. Dormant mode may comprise RRC idle mode, RRC suspend and / or RRC inactive mode. For example, the wireless device may be in dormant mode when the connection with the network node has been released and / or suspended.

[0023] To save power, wireless devices can be configured with discontinuous reception scheme, DRX, where the wireless device periodically wake up once per DRX cycle, to monitor for potential paging when in RRC_IDLE / INACTIVE or potential downlink data when in RRC_CONNECTED, to reduce the cost of channel listening and / or monitoring. The cost of monitoring the channel for paging or downlink data can still become significant, particularly when the traffic is rare. To further reduce the power consumption, downlink control information, DCI, based wake-up signal, WUS, was introduced for new radio, NR, wireless devices operating in RRC_IDLE / INACTIVE and RRC_CONNECTED states. In these schemes or states, the wireless device monitors for a potential DCI-based WUS instead where the total average power consumption for the monitoring of the DCI-based WUS is much lower than the one for paging or downlink data. More specifically, for NR wireless devices in CONNECTED mode, in Rel-16, physical downlink control channel, PDCCH, based WUS was introduced using DCP (DCI format 2_6 with cyclic redundancy check, CRC, scrambled by Paging System Radio Network Temporary Identifier, PS-RNTI). This DCI is used for notifying the power saving information including wake-up indication outside DRX Active Time for one or more wireless devices.

[0024] One implication is that the wireless devices with the same minimum time-gap are needed to be grouped into the same DCI 2_6 transmission. In the DCI 2_6 transmission there may be up to N = 140 fields for different wireless devices. The wireless device may read the DCI-2-6 structure and detect whether any Wake-up indication is for the wireless device.

[0025] The wireless device may use Paging Early Indication, PEI, in RRC_IDLE and RRC_INACTIVE states in order to reduce power consumption. In this scheme, similar to the WUS scheme in CONNECTED mode, a wireless device is notified in advance of its Paging Occasion, PO, by a PEI, whether the wireless device has to monitor. As a result of this, a wireless device can skip the time-frequency synchronization prior to a PO, if the wireless device need not to monitor the PO. The wireless device monitors one PEI occasion per DRX cycle. A PEI occasion (PEI-O) is a set of PDCCH monitoring occasions (MOs) and can consist of multiple time slots (e.g. subframes or OFDM symbols) where PEI can be sent. Another important aspect with PEI is that it may carry sub-grouping information to divide the wireless devices, sharing the same Paging Occasion, into sub-groups. If the wireless device detects PEI and the PEI indicates the subgroup the wireless device belongs to, via subgroup ID, the wireless device monitors the associated PO. Subgrouping can be i) CN controlled subgrouping, or ii) wireless device ID based subgrouping.

[0026] In CN controlled subgrouping, the access and mobility management function, AMF, is responsible for assigning subgroup ID to the wireless device. The total number of subgroups for CN controlled subgrouping can be configured up to 8, e.g., by operation, administration, and maintenance, CAM.

[0027] In wireless device ID based subgrouping, the gNB and wireless device can determine the subgroup ID based on the wireless device ID and the total number of subgroups for wireless device ID based subgrouping in the cell. The total number of subgroups for wireless device ID based subgrouping is decided by the gNB for each cell and can be different in different cells. WUS and wireless device sub-grouping have also been used in massive machine type communication, mMTC / NB-loT devices and when they are in IDLE mode. The WUS may be sequence based and may be transmitted before the PO. The group of wireless devices listening to the same PO are further sub-grouped by time / frequency multiplexing.

[0028] Previously, a study on low-power wake-up signal and receiver for NR was agreed.

[0029] In case of connected mode when a Low-Power wake-up signal, LP-WUS, for connected mode is received by a lower power receiver, LR, it triggers the main receiver, MR, to wake-up and to start monitor PDCCH. In connected mode, the MR, however, may not go to ultra-deep / deep sleep mode as it may need to keep its full synchronization and also the transition time to turn on the MR may need to be kept short. However, by switching off some parts of MR circuitry, power consumption can be further reduced.

[0030] In case of Idle / lnactive mode, the introduction of LP-WUS / WUR in idle / lnactive mode, enabled the Main Receiver (MR) of a wireless device to enter ultra-deep sleep state, which denotes a state when the MR may sleep or turn off. When a Low-Power wake-up signal is received by LR, it triggers the MR to wake-up and monitor the paging channel PDCCH or initiate an uplink transmission by performing random channel access (RACH).

[0031] For wireless devices in CONNECTED mode, one proposal from the study has been to use the LP-WUS in the same way as in Rel-16. As a first option, LP-WUS may be used similarly as in Rel-16 DCP. For example, DCI 2_6 includes information about the timing and parameters for WUS transmission, such as the timing offset, duration, DRX active time, frequency, and modulation scheme used for the WUS. It may be appreciated that a longer time offset may likely have to be applied to cover the MR transition time compared to DCP. Other options described, is to let the LR operate in always on, instead of duty-cycled, or that the duty-cycle for LR monitoring LP-WUS is much shorter than for MR PDCCH occasions (e.g., DRX active time).

[0032] For wireless devices in IDLE / INACTIVE mode, similar as PEI, the subgrouping methods for LP- WUS could include the CN assigned, and wireless device_ID based subgrouping. Further details such as which one / both should be supported, how to support / provide the configuration, etc., could be further determined during Wl phase.

[0033] The existing WUS solutions may be suitable when the main radio or an OFDM based receiver is used for their detection. They are DCI based and therefore information related to multiple wireless devices or group of wireless devices can be accommodated in one signal transmission. To allow for design of low-power low complexity wake-up receiver, simple modulation such as OOK may be used for LP WUS transmission. This means that a new WUS structure may be needed to accommodate information related to a wake-up indication, an intention for a subsequent activity (such as action) after the wake-up, and / or target wireless devices / wireless devices. This may be seen as one of the problems addressed in the present disclosure. The present disclosure provides solutions that can be used for wireless devices in both IDLE / INACTIVE and CONNECTED modes.

[0034] As discussed in detail herein, the present disclosure relates to a wireless communication system 1 comprising a cellular system, for example, a 3rdGeneration Partnership Project, 3GPP, wireless communication system. The wireless communication system 1 comprises a first wireless device 300, a second wireless device 300A, a network node 400, and / or a core network (CN) node 600. A network node disclosed herein refers to a radio access network node operating in the radio access network, such as a base station, an evolved Node B, eNBs, a next generation Node B, gNBs. The wireless communication system 1 described herein may comprise one or more wireless devices 300, 300A, and / or one or more network nodes 400, such as one or more of: a base station, an eNB, a next generation Node B and / or an access point. A wireless device may refer to a mobile device and / or a user equipment, UE, an internet of things (loT) device and / or an ambient loT device. The wireless device 300, 300A may be configured to communicate with the network node 400 via a wireless link (or radio access link) 10, 10A. The first wireless device 300 may be configured to communicate with the second wireless device 300A and vice-versa, via a direct link 10B, such as a wireless link (or radio access link).

[0035] The figures are schematic and simplified for clarity, and they merely show details which aid understanding the disclosure, while other details have been left out. Throughout, the same reference numerals are used for identical or corresponding parts.

[0036] Fig. 1 is a diagram illustrating an example wireless communication system 1 comprising an example network node 400, a core network (CN) node 600, an example first wireless device 300, and an example second wireless device 300A according to this disclosure.

[0037] As discussed in detail herein, the present disclosure relates to a wireless communication system 1 comprising a cellular system, for example, a 3GPP wireless communication system. The wireless communication system 1 comprises a first wireless device 300 and a network node 400. Optionally, the wireless communication system 1 comprises a second wireless device 300A.

[0038] A network node, NN, disclosed herein refers to a radio access network node operating in the radio access network, such as a base station, an evolved Node B, eNB, gNB in NR. In one or more examples or embodiments, the RAN node is a functional unit which may be distributed in several physical units. A core network, CN, node disclosed herein refers to a network node operating in the core network, such as in the Evolved Packet Core Network, EPC, and / or a 5G Core Network, 5GC. Examples of CN nodes in EPC include a Mobility Management Entity, MME. Example of CN nodes in 5GC include an AMF.

[0039] In one or more examples or embodiments, examples, RAN node is a functional unit which may be distributed in several physical units.

[0040] The network node 400, such as gNB 400, transmits in the downlink, DL, to the first wireless device 300 and / or the second wireless device 300A, e.g., via broadcast transmissions.

[0041] The first wireless device 300 and / or the second wireless device 300A, such as the first UE and the second UE, transmit in the uplink, UL, to the network node 400, such as gNB 400.

[0042] Figs. 2A-2B shows a flow diagram of an example method 100, performed by a network node according to the disclosure, for enabling low power operation of a wireless device, such as a first wireless device as disclosed herein. In other words, the method may be for enabling low-power wake-up signal, LP-WUS, operation of a wireless device. The network node is the network node disclosed herein, such as network node 400 of Fig. 1 , Fig. 4, and Fig. 7.

[0043] In one or more example methods, the method 100 comprises receiving S102, from the first wireless device, information indicative of radio capability of the first wireless device. In one or more examples or embodiments, the method 100 comprises receiving information indicative of a low power operation capability, such as low power receiver capability. In other words, the radio capability of the first wireless device may indicate whether the first wireless device comprises a low-power wake-up receiver (LP-WuRx) or an LR. The radio capability of a wireless device may be seen as the wireless device's ability to communicate wirelessly over radio frequency, RF, channels with network nodes, such as base stations, or other wireless devices in a cellular network. For example, the radio capability may comprise one or more of: energy efficiency and power management capability, frequency bands capability, modulation and coding schemes capability, receiver and / or antenna capability, radio access technology capability, RRC procedures capability, and interference mitigation and coexistence capability. The radio capability may for example indicate that the wireless device has activated the operation of its LP-WuRx and thereby allocation of the LP-WUS. For example, the wireless device in connected mode has entered for instance C-DRX mode of operation in an extended reality (XR)-type application or the wireless device in idle mode has been configured with DRX operation.

[0044] In one or more example methods, a configuration, such as the configuration as disclosed herein (e.g., the configuration of S114), is based on the radio capability of the first wireless device. In other words, the configuration may be based on whether the first wireless device comprises a LP- WuRx. For example, the configuration may be based on one or more of: energy efficiency and power management capability, frequency bands capability, modulation and coding schemes capability, receiver and / or antenna capability, radio access technology capability, RRC procedures capability, and interference mitigation and coexistence capability.

[0045] In one or more example methods, the method 100 comprises receiving S104, from the first wireless device, information indicative of an operation state or mode of the first wireless device. In other words, information indicative of an operation state may be seen as information indicative of an operation mode of the first wireless device. For example, an operation state may comprise one or more of: a connected mode, a dormant mode (such as idle mode or inactive mode), a deep sleep mode, and an ultra-deep sleep mode. In one or more examples or embodiments, the operation state may be indicated in a capability information from the first wireless device, such as the radio capability. An operation state of a wireless device may be determined based on an interaction between the wireless device and the network node. In other words, an operation state of a wireless device, such as an RRC state, may be set by a network node (such as base station and / or AMF) based on a request from the wireless device. For example, an operation state of a wireless device, such as an RRC state, may be set by a network node after signaling messages have been exchanged between the wireless device and the network node. Control signaling messages such as RRC connection setup, reconfiguration, release, and mobility procedures may be used to control the state transitions and manage the connection between the wireless device and the network node. In connected mode the network node (such as gNB) may be aware of the operation mode / state of the wireless device (such as first wireless device). In Idle mode, the network node (such as AMF) may be aware of a connection / operation mode / state of the wireless device. In the latter case, the information indicative of the operation state of a wireless device may be indicated implicitly when the AMF triggers the base station (such as gNB) to transmit the LP-WUS to the wireless device, e.g., in case of paging. It may be appreciated that an RRC inactive mode may be seen as Idle mode from the base station point of view, but may be seen as Connected mode (such as CN connected mode) from a CN point of view.

[0046] In one or more example methods, the configuration such as the configuration as disclosed herein (e.g., the configuration of S114), is based on the operation state. In other words, the configuration may be obtained, retrieved, and / or determined based on the operation state or mode of the first wireless device. For example, the configuration may be based on one or more of: a connected mode, a dormant mode (such as idle mode or inactive mode. It may be appreciated that when the wireless device, such as first wireless device, is in Idle mode, the network node determining the configuration may be the AMF in the Core Network. In one or more example methods, the method 100 comprises obtaining S106 information (such as mapping information) of a mapping between the set of sequences and the pre-determined intended activities. For example, the network node may obtain information of a mapping between the set of sequences and the pre-determined intended activities before transmitting S114 the configuration to the first wireless device as described herein. In other words, the network node may obtain information of a mapping between the set of sequences and the pre-determined intended activities before or when determining a configuration as disclosed herein and / or before of when determining a LP-WUS to be transmitted to the first wireless device. Obtaining S106 information of a mapping between the set of sequences and the pre-determined intended activities may comprise determining, receiving, and / or retrieving information of a mapping between the set of sequences and the pre-determined intended activities. In other words, the information provides a mapping between each sequence of the set of sequences and a predetermined intended activity. For example, each sequence may be mapped to a certain predetermined intended activity. The mapping information may be seen as a pre-determined mapping known by the network node and / or the first wireless device. It may be appreciated that the network node and / or the first wireless device may obtain the information of the mapping from one or more standards and / or from a list mapping the set of sequences to pre-determined intended activities.

[0047] In one or more example methods, the method 100 comprises selecting S108 a sequence based on a pre-determined intended activity associated with the sequence, such as according to the information of the mapping between the set of sequences and the pre-determined intended activities. For example, the network node may select a sequence based on a pre-determined intended activity associated with the sequence before transmitting S114 the configuration to the first wireless device as described herein. In other words, the network node may select a sequence based on a pre-determined intended activity associated with the sequence before or when determining a configuration as disclosed herein and / or before or when determining a LP-WUS to be transmitted to the first wireless device. Selecting S108 a sequence may comprise selecting a sequence or sequencing technique for transmitting an LP-WUS, such as for transmitting a LP- WUS comprising a first sequence to the first wireless device. For example, the method 100 comprises selecting a sequence as being the first sequence based on a certain pre-determined intended activity associated with that sequence. In other words, selecting S108 a sequence may comprise selecting a sequence, such as the first sequence, from the set of sequences based on a pre-determined intended activity associated with the sequence to be performed by the first wireless device, e.g., subsequently performed by the first wireless device. Selecting S108 a sequence may comprise obtaining, retrieving, determining, and / or receiving a sequence, such as the first sequence, from the set of sequences based on a pre-determined intended activity associated with the sequence to be performed by the first wireless device. For example, selecting S108 a sequence may comprise obtaining, retrieving, determining, and / or receiving a sequence, such as the first sequence, from a list of pre-determined sequences, e.g., for selecting and / or determining a LP-WUS to be transmitted.

[0048] In one or more example methods, the method 100 comprises determining S112 a plurality of resource IDs by using time and / or frequency resource multiplexing. Determining S112 a plurality of resource IDs may comprise dividing an available radio spectrum, such as available timefrequency resources, into time slots and frequency subcarriers by using time and / or frequency resource multiplexing. The multiple resource IDs may each identify a time-frequency resource, such as a time-frequency resource block, associated with a wireless device. In other words, a resource ID of the multiple resource IDs may be assigned to a certain time-frequency resource which in turn may be associated with a certain wireless device. For example, multiple LP-WUS resources may be configured by being multiplexed in time and frequency.

[0049] In one or more example methods, the method 100 comprises transmitting S114A, to a group of wireless devices, one or more configurations, such as one or more LP-WUS configurations and / or LP-WuRx configurations. In one or more examples or embodiments, the method comprises transmitting a different configuration to each wireless device of the group of wireless devices. In one or more examples or embodiments, the method comprises transmitting a same or common configuration to the wireless devices of the group of wireless devices. The description of the configuration relating to step S114 may also apply to the description of the one or more configurations. In other words, the description of step S114 may be valid for a plurality of wireless devices, such as a group of wireless devices.

[0050] In one or more example methods, the one or more configurations, such as one or more LP-WUS configurations and / or LP-WuRx configurations, identify time-frequency resources for the group of wireless devices to monitor for one or more LP-WUS sequences. Determining S112 a plurality of resource IDs may enable the allocation of multiple resources having different resource IDs to different wireless devices of the group of wireless devices. In other words, each configuration of the one or more configurations may identify different time frequency resources for each wireless device of the group of wireless devices. For example, each wireless device of the group of wireless devices may be configured to monitor different time-frequency resources to monitor for different LP-WUS sequences.

[0051] In one or more example methods, each wireless device of the group of wireless devices is assigned a resource ID of the plurality of resource IDs. For example, a resource ID may be assigned to each LP-WUS resource, and the network node may assign or associate the resource to the target wireless device. The time and / or frequency resource multiplexing, such as LP-WUS resource multiplexing, is illustrated in Fig. 6. In one or more examples or embodiments, the timefrequency resources are only allocated for an LP-WUS transmission during an activation period. However, the resources may be used for other purposes by the network node, NN, on the other occasions. Further, the allocation may be released and be reassigned to other wireless devices during RRC release and when a wireless device enters from the connected mode to idle mode. In one or more examples or embodiments, the method 100 comprises transmitting, to the group of wireless devices, one or more LP-WUS according to the one or more configurations, wherein each of the one or more LP-WUS comprises a sequence from a set of sequences, wherein each sequence of the set of sequences is associated with a pre-determined intended activity, and wherein each of the one or more sequences is configured to trigger an activity of a wireless device. Formulated differently, the network node may be configured to transmit sequences in wireless device specific and / or group specific resources by using time and / or frequency multiplexing of the time-frequency resources used to send the sequences to the wireless devices. It may be appreciated that different sequences may be used to allow for different subsequent activities of a wireless device.

[0052] In one or more example methods, the plurality of resource IDs are arranged according to a resource ID pattern based on the time and / or frequency resource multiplexing. In other words, determining the plurality of resource IDs may comprise dividing an available radio spectrum, such as available time-frequency resources, into time slots and frequency subcarriers by using time and / or frequency resource multiplexing and arranging the plurality of resource IDs according to the resource ID pattern. An example of an arrangement of resource IDs according to a resource ID pattern is illustrated in Fig. 6.

[0053] In one or more example methods, the method 100 comprises indicating S110 the resource ID pattern to the first wireless device. By knowing the resource ID pattern, it may be easier for the first wireless device to find the LP-WUS resource. The resource pattern ID may allow the first wireless device to know where to find that resource and thereby providing a more efficient monitoring of resources. In one or more examples or embodiments, indicating the resource ID pattern comprises signaling the pattern to the first wireless device, e.g., an explicit signaling. The resource ID pattern may be seen as a mapping of resource IDs to time-frequency resources and / or to wireless devices. Alternatively or additionally, the resource ID pattern may be predefined in the specification, i.e., no explicit signaling may be needed. In this case, the first wireless device may assume such pre-defined pattern when the configuration is received and / or when monitoring the time-frequency resources. For example, the first wireless device may assume such pre-defined pattern when receiving an arrangement of resource IDs according to a resource ID pattern is illustrated in Fig. 6. Indicating S110 the resource ID pattern may comprise broadcasting the resource ID mapping, e.g., in the system information. Indicating S110 the resource ID pattern may comprise transmitting a message to a wireless device about the resource ID mapping. In one or more examples or embodiments, the resource ID pattern may be indicated in a broadcast of system information and a resource ID as disclosed herein may be comprised in the configuration as disclosed herein, such as indicated via the configuration to a wireless device. In one or more examples or embodiments, indicating S110 the resource ID pattern may occur after determining S112 the resource ID. In one or more examples or embodiments, indicating S110 the resource ID pattern may occur before determining S112 the resource ID.

[0054] The method 100 comprises transmitting S114, to a first wireless device, information indicative of a configuration. In one or more examples or embodiments, the information comprises the configuration. In one or more examples or embodiments, the information indicates to the first wireless device how to obtain determine, and / or retrieve the configuration. The configuration identifies time-frequency resources for the first wireless device to monitor for one or more LP- WUS sequences. A LP-WUS sequence may be seen as a sequence of symbols or patterns used in wireless communication systems, particularly in low-power or energy-efficient wireless protocols and devices. The purpose of a LP-WUS sequence may be to wake up a receiver or a transmitter from a low-power sleep state while consuming minimal energy, enabling efficient communication with minimal power consumption. In one or more examples or embodiments, transmitting S114 information to the first wireless device may comprise broadcasting the information indicative of the configuration to one or more wireless devices, such as comprising the first wireless device. In other words, the configuration may define the time-frequency resources the first wireless device is to monitor for subsequently one or more LP-WUS sequences transmitted by the network node. The network node may expect the wireless device to monitor this reoccurring resource for the potential one or more LP-WUS sequences.

[0055] For example, the configuration may identify, map, and / or indicate to the first wireless device a certain time and frequency resource, from a set of time and frequency resources being available for LP-WUS transmission, which is allocated to the first wireless device. In one or more examples or embodiments, transmitting S114 the configuration comprises a plurality of steps, messages, and / or signal transmissions. In other words, transmitting S114 the configuration may comprise transmitting a plurality of configuration signals and / or messages to the first wireless device and / or the group of wireless devices, e.g., for indicating different parameters of the configuration in different configuration signals and / or messages to the first wireless device and / or the group of wireless devices.

[0056] In one or more example methods, the time-frequency resources are for exclusive use by the first wireless device. For example, the time-frequency resources may be assigned and / or allocated exclusively for the first wireless device. In other words, the identified time-frequency resources may be intended to be monitored only by the first wireless device. For example, this may be the case when the target wireless device is wireless device specific, e.g., specific to the first wireless device. The pre-determined intended activity may be specific for the first wireless device. For example, in Connected mode each wireless device may be configured to monitor a timefrequency resource where the LP-WUS signal(s) are transmitted to this wireless device. Thereby the wireless device may only need to monitor one field (such as one time-frequency resource block) to detect whether the wireless device shall wake-up or not. In another example, in idle mode each wireless device or group of wireless devices may monitor the allocated time-frequency resources (such as specific time-frequency resources) in the same way. It may be appreciated that in both connected mode and idle mode, the subsequent pre-determined intended activity may be triggered by transmitting different bit sequences (such as waveforms) in the allocated timefrequency resource (such as time-frequency resource field). In one or more examples or embodiments, the sequences may be orthogonal to each other, e.g., using Hadamard codes, as in a code multiplexed scheme. In one or more examples or embodiments, the sequences may be selected from a set of sequences, such as m-sequences having good auto and cross correlation properties. In some examples, the sequences may also carry information as an identification of the wireless device. In some examples, the LP-WUS may contain sequences or bit information carrying identity information of the wireless device(s).

[0057] In one or more example methods, the time-frequency resources are to be monitored by a group of wireless devices, such as a group of wireless devices as disclosed herein. The group of wireless devices may comprise the first wireless device and a second wireless device as disclosed herein. In other words, the time-frequency resources may be monitored by a plurality of wireless devices, such as monitored by the group of wireless devices. This may for example be the case in IDLE mode or Inactive mode, where the network node may send paging, e.g., containing system information, SI, updates.

[0058] In one or more example methods, the configuration, such as the configuration as disclosed herein (e.g., the configuration of S114), indicates a time-frequency resource pattern. In other words, the configuration may indicate to the first wireless device and / or the group of wireless devices a timefrequency resource pattern. A time-frequency resource pattern may be seen as a pattern defining how time-frequency resources are allocated to one or more wireless devices. A time-frequency resource pattern may define allocation of time-frequency resources to individual wireless devices and / or to a group of wireless devices. A time-frequency resource pattern may be seen as a structured arrangement of time and frequency resources within a wireless communication system. A time-frequency resource pattern may divide the available radio spectrum into time slots and frequency subcarriers. Time slots may represent discrete intervals of time during which data transmission or reception can occur, while frequency subcarriers may represent individual frequency bands within the total available bandwidth. In one or more examples or embodiments, the time-frequency pattern may be associated with an assignment of resource IDs as disclosed herein. In other words, the time-frequency pattern may arrange the time-frequency resources such that each time-frequency resource block is associated with a resource identification ID as disclosed herein. It may be appreciated that each resource ID may be associated with a wireless device.

[0059] In one or more example methods, the configuration, such as the configuration as disclosed herein (e.g., the configuration of S114), indicates how to determine the first activity based on the first sequence. For example, the configuration may indicate the mapping between the pre-determined intended activity to be performed by the first wireless device and the sequence (such as first sequence) and / or information carried by the LP-WUS. The configuration may indicate how the first wireless device is to detect, decode, and / or derive the first activity (such as first predetermined intended activity) based on the first sequence. In one or more examples or embodiments, the configuration may comprise the information of the mapping between the set of sequences and the pre-determined intended activities and / or indicate how to obtain the information of the mapping between the set of sequences and the pre-determined intended activities.

[0060] In one or more example methods, the configuration, such as the configuration as disclosed herein (e.g., the configuration of S114), indicates a first resource identification, ID, associated with the first wireless device. The first resource ID may identify a time-frequency resource, such as a timefrequency resource block, associated with the first wireless device. In other words, a resource ID may be assigned to a certain time-frequency resource which in turn may be associated with a certain wireless device. The first resource ID may identify which time-frequency resource to be monitored by the first wireless device, e.g., for receiving the first sequence. In one or more examples or embodiments, a resource ID may be provided in a separate RRC signaling or lower layer signaling, such as medium access control, MAC, control element, CE. A resource ID may be a unique ID associated with a wireless device, e.g., for allocating a time-frequency resource block to a specific wireless device. A time-frequency resource block may be a block of a grid of time-frequency resources as disclosed herein. In one or more examples or embodiments, transmitting S114 the configuration comprises a plurality of steps and / or signal transmissions. For example, transmitting S114 the configuration may comprise transmitting a first signal, e.g., comprising a first configuration signal, such as an overall configuration, to the first wireless device and / or the group of wireless devices and transmitting a second signal, e.g., comprising a second configuration signal, assigning or identifying the time-frequency resources to the first wireless device and / or the group of wireless devices.

[0061] The transmitting S114 may be performed through radio resource control, RRC, signaling. In one or more examples or embodiments, the target wireless device(s), such as the first wireless device, may be equipped with a low-power wake-up receiver configured to operate in a low-power mode to detect wake-up signals while consuming minimal energy. The configuration may be seen as a LP-WuRx configuration. In one or more examples or embodiments, the configuration may be indicative of a wake-up indication, an intention for a subsequent activity after the wake-up, and / or target wireless device(s). In one or more examples or embodiments, the method comprises obtaining the configuration. Obtaining the configuration may be seen as determining, retrieving, and / or receiving the configuration.

[0062] The method 100 comprises transmitting S116, to the first wireless device, a LP-WUS according to the configuration. In other words, the method 100 may comprise transmitting the LP-WUS in the time-frequency resources identified by the configuration. It may be appreciated that the transmitted LP-WUS may be part of the one or more LP-WUS sequences identified by the configuration to be monitored by the first wireless device. The LP-WUS may be seen as a first LP-WUS transmitted to the first wireless device being the target receiver. The LP-WUS comprises a first sequence from a set of sequences. In other words, the first sequence may be seen as intended for the first wireless device and selected from a set of sequences, such as LP-WUS sequences. Each sequence of the set of sequences is associated with a pre-determined intended activity. Formulated differently, each sequence of the set of sequences may be associated and / or mapped to a specific intended activity. The set of sequences may be seen as pre-defined sequences, where each sequence may be associated with a pre-determined intended activity. In one or more examples or embodiments, there is a mapping between a sequence to the intended activity. The mapping can be defined in the specifications or configured by the network node and the configuration is provided to the wireless device. The first sequence may be selected from a list of sequences (e.g., the set of sequences) based on an activity to be performed by the first wireless device subsequently. A pre-determined intended activity may be seen as an activity intended to be performed by a wireless device subsequently to a wake-up, where the activity has been pre-determined to be associated and / or mapped with a certain sequence and predetermined in the nature and / or type of the activity to be performed.

[0063] The first sequence is configured to trigger a first activity of the first wireless device. In other words, the first sequence may allow the first wireless device to identify a first activity, such as a first predefined activity to be performed by the first wireless device. For example, the first activity may be seen as an activity intended for the first wireless device and selected from a set of pre-determined intended activities. In one or more examples or embodiments, transmitting S116 a LP-WUS to the first wireless device comprises transmitting the LP-WUS based on an activity to be performed by the first wireless device. In other words, the LP-WUS may be transmitted according to a selected and / or requested activity to be subsequently performed by the first wireless device after wake-up.

[0064] In one or more example methods, the pre-determined intended activity comprises one or more of: switching on a main receiver of the first wireless device and start listening to paging; switching on a transmitter of the first wireless device and perform an uplink transmission; performing a jitter handling; switching on a main receiver and monitoring (or not monitoring) an upcoming Connected Mode Discontinuous Reception, cDRX, active period; advancing or delaying switching on a main receiver associated to advancing or delaying monitoring an upcoming cDRX active period (such as based on a jitter value in an XR application), and preventing a main receiver from switching on a main receiver or transmitter.

[0065] Switching on a main receiver of the first wireless device and start listening to paging may correspond to a machine type communication, MTC, wake-up signal, WUS, in NR.

[0066] Switching on a transmitter of the first wireless device and perform an uplink transmission may comprise switching on a transmitter of the first wireless device and perform a random access channel, RACH, procedure by physical random access channel, PRACH, transmission (such as transmitting message 1 or preamble) or an UL transmission via Preconfigured Uplink Resources, PUR.

[0067] Performing a jitter handling may be seen as performing a jitter handling for a specific device, e.g., a device with a certain capability.

[0068] Switching on a main receiver and monitoring (or not monitoring) an upcoming Connected Mode Discontinuous Reception, cDRX, active period may be seen as switching on a main receiver and performing physical downlink control channel, PDCCH, monitoring.

[0069] Advancing or delaying switching on a main receiver associated to advancing or delaying monitoring an upcoming cDRX active period may be based on a jitter value in an XR application. For example, a jitter value may be a positive value or a negative value. A positive jitter value may lead to delaying an upcoming cDRX active period and a negative value may lead to advancing an upcoming cDRX active period.

[0070] In one or more examples or embodiments, the LP-WUS sequence may indicate one of the above pre-determined intended activities. This means that sequences may serve for different purposes and activities depending on the information they carry. In one or more example methods, the first sequence is associated with one or more of: a request for switching on a main receiver of the first wireless device and start listening to paging; a request for switching on a transmitter of the first wireless device and perform an uplink transmission; a request for a jitter handling; a request for switching on a main receiver and monitoring an upcoming Connected Mode Discontinuous Reception, cDRX, active period; a request for advancing or delaying switching on a main receiver associated to advancing or delaying monitoring an upcoming cDRX active period, and a request for preventing a main receiver from switching on a main receiver or transmitter.

[0071] In one or more example methods, the first sequence comprises information related to the first wireless device. The information can be related to the device identification. The information can be carried in by assigning a certain sequence to the first wireless device, e.g., orthogonal to the other sequences assigned to f other wireless devices. The information can be carried as spreading code to each bit sequence / information.

[0072] Fig. 3 shows a flow diagram of an example method 200, performed by a first wireless device according to the disclosure, for enabling low power operation. The wireless device is the first wireless device disclosed herein, such as first wireless device 300 of Fig. 1 , Fig. 5, and Fig. 7. It may be appreciated that the first wireless device may form part of the group of wireless devices as disclosed herein, such as be member of the group.

[0073] In one or more example methods, the method 200 comprises transmitting S202, to a network node, information indicative of radio capability of the first wireless device. Transmitting S202 information indicative of radio capability may correspond to the reception S102 of Figs. 2A-2B.

[0074] In one or more example methods, the configuration is based on the radio capability of the first wireless device.

[0075] In one or more example methods, the method 200 comprises transmitting S204, to the network node, information indicative of an operation state of the first wireless device. Transmitting S204 information indicative of an operation state may correspond to the reception S104 of Figs. 2A-2B.

[0076] In one or more example methods, the configuration is based on the operation state.

[0077] In one or more example methods, the method 200 comprises receiving S210, from the network node, an indication of a resource ID pattern to the first wireless device. Receiving S210 an indication of a resource ID pattern may correspond to the indication S110 of Figs. 2A-2B. In one or more example methods, the method 200 comprises detecting S211 the first sequence based on the resource ID pattern. The resource pattern ID may allow the first wireless device to know where to find that resource and thereby providing a more efficient monitoring of resources. In one or more examples or embodiments, indicating the resource ID pattern comprises signaling the pattern to the first wireless device, e.g., an explicit signaling. Alternatively or additionally, the resource ID pattern may be pre-defined in the specification, i.e., no explicit signaling may be needed. In this case, the first wireless device may assume such pre-defined pattern when the configuration is received and / or when monitoring the time-frequency resources. For example, the first wireless device may assume such pre-defined pattern when receiving an arrangement of resource IDs according to a resource ID pattern is illustrated in Fig. 6.

[0078] In one or more example methods, the method 200 comprises obtaining S208 information of a mapping between the set of sequences and the pre-determined intended activities. Obtaining S208 information of a mapping between the set of sequences and the pre-determined intended activities may comprise determining, receiving, and / or retrieving information of a mapping between the set of sequences and the pre-determined intended activities. In other words, the information provides a mapping between each sequence of the set of sequences and a predetermined intended activity. For example, each sequence may be mapped to a certain predetermined intended activity. It may be appreciated that the first wireless device may obtain the information of the mapping from one or more standards and / or from a list mapping the set of sequences to pre-determined intended activities.

[0079] The method 200 comprises receiving S214, from a network node, information indicative of a configuration. The configuration identifies time-frequency resources for the first wireless device to monitor for one or more LP-WUS sequences. Receiving S214 information indicative of a configuration may correspond to the transmission S114 of Figs. 2A-2B.

[0080] In one or more examples or embodiments, the method 200 comprises monitoring S215 the timefrequency resources according to the configuration to detect whether one or more LP-WUS sequences are received. It may be appreciated that the monitoring S215 may be comprised in the receiving S214 step. The method 200 may comprise monitoring S215 the time-frequency resources in response to receiving the configuration.

[0081] The method 200 comprises receiving S216, from the network node, a LP-WUS according to the configuration. The LP-WUS comprises a first sequence from a set of sequences. Each sequence of the set of sequences is associated with a pre-determined intended activity. The first sequence is configured to trigger a first activity of the first wireless device. Receiving S216 a LP-WUS may correspond to the transmission S116 of Figs. 2A-2B. The sequences that may be constructed so that the receiving device (such as wireless device) can identify at least a wake-up indication, an intention for a subsequent activity after the wake-up, and / or target wireless device. In one or more example methods, the method 200 comprises performing S218 the first activity in accordance with the LP-WUS. In other words, the method 200 may comprise executing the first activity associated with the received LP-WUS sequence.

[0082] In one or more examples or embodiments, the method 200 may comprise performing one or more of: switching on a main receiver of the first wireless device and start listening to paging; switching on a transmitter of the first wireless device and perform an uplink transmission; performing a jitter handling; switching on a main receiver and monitoring (or not monitoring) an upcoming Connected Mode Discontinuous Reception, cDRX, active period; advancing or delaying switching on a main receiver associated to advancing or delaying monitoring an upcoming cDRX active period (such as based on a jitter value in an XR application), and preventing a main receiver from switching on a main receiver or transmitter.

[0083] In one or more examples or embodiments, the network node may be configured to (such as expected to) generate the LP-WUS sequence associated with the activity that the first wireless device intends to perform upon detection of the LP-WUS. The generated sequence may be used together with the received LP-WUS sequence by the first wireless device for the correlation purpose. It may be appreciated that high correlation value may be produced when the generated sequence and the received LP-WUS sequence are identical.

[0084] It may be appreciated that any of the definitions and terms used in the description of Figs. 2A-2B may also apply to the description of Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, and vice versa. For example, any definitions and terms associated with the method performed by the network node disclosed herein may also apply and / or be used to the definitions and terms relating to the method performed by the first wireless device and to the first wireless device itself as disclosed herein and vice versa.

[0085] Fig. 4 shows a block diagram of an example network node 400 according to the disclosure. The network node 400 comprises memory circuitry 401 , processor circuitry 402, and a wireless interface 403. The network node 400 may be configured to perform any of the methods disclosed in Fig. 3. In other words, the network node 400 may be configured for enabling low power operation of a wireless device.

[0086] The network node 400 is configured to communicate with a user equipment, such as the wireless device disclosed herein, using a wireless communication system.

[0087] The network node 400 may be configured to communicate with a wireless device, such as the first wireless device and / or the second wireless device disclosed herein, using a wireless communication system. The network node 400 may be configured to communicate with a group of wireless devices as disclosed herein, using a wireless communication system. The wireless interface 403 is configured for wireless communications via a wireless communication system, such as a 3GPP system, such as a 3GPP system supporting one or more of: 6G or beyond radio system, New Radio, NR, Long Term Evolution, LTE, Narrow-band loT, NB-loT, and Long Term Evolution - enhanced Machine Type Communication, LTE-M, and 3GPP system operated in licensed bands or unlicensed bands.

[0088] The network node 400 is configured to transmit (such as via the wireless interface 403 and / or using the processor circuitry 402), to a first wireless device, information indicative of a configuration. The configuration identifies time-frequency resources for the first wireless device to monitor for one or more LP-WUS sequences.

[0089] The network node 400 is configured to transmit (such as via the wireless interface 403 and / or using the processor circuitry 402), to the first wireless device, a LP-WUS according to the configuration. The LP-WUS comprises a first sequence from a set of sequences. Each sequence of the set of sequences is associated with a pre-determined intended activity. The first sequence is configured to trigger a first activity of the first wireless device.

[0090] Processor circuitry 402 is configured to perform any of the operations disclosed in Figs. 2A-2B. The operations of the network node 400 may be embodied in the form of executable logic routines (for example, lines of code, software programs, etc.) that are stored on a non-transitory computer readable medium (for example, memory circuitry 401 ) and are executed by processor circuitry 402).

[0091] Furthermore, the operations of the network node 400 may be considered a method that the network node 400 is configured to carry out. Also, while the described functions and operations may be implemented in software, such functionality may also be carried out via dedicated hardware or firmware, or some combination of hardware, firmware and / or software.

[0092] Memory circuitry 401 may be one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, a random-access memory (RAM), or other suitable device. In a typical arrangement, memory circuitry 401 may include a non-volatile memory for long term data storage and a volatile memory that functions as system memory for processor circuitry 402. Memory circuitry 401 may exchange data with processor circuitry 402 over a data bus. Control lines and an address bus between memory circuitry 401 and processor circuitry 402 also may be present (not shown in Fig. 4). Memory circuitry 401 is considered a non- transitory computer readable medium.

[0093] Memory circuitry 401 may be configured to store information, such as information indicating configurations, time-frequency resources, LP-WUS sequences, pre-determined intended activities, radio capabilities, operation states, time-frequency resource patterns, resource IDs, and / or resource ID patterns in a part of the memory. Fig. 5 shows a block diagram of an example wireless device 300 according to the disclosure. The wireless device 300 comprises memory circuitry 301 , processor circuitry 302, and a wireless interface 303. The wireless device 300 may be configured to perform any of the methods disclosed in Fig. 3. In other words, the wireless device 300 may be configured for enabling low power operation.

[0094] The wireless device 300 is configured to communicate with a network node, such as the wireless device disclosed herein, using a wireless communication system.

[0095] The wireless device 300 is configured to receive (such as via the wireless interface 303 and / or using the processor circuitry 302), from a network node, information indicative of a configuration, wherein the configuration identifies time-frequency resources for the first wireless device to monitor for one or more LP-WUS sequences.

[0096] The wireless device 300 is configured to monitor (such as using the processor circuitry 302 and / or via the wireless interface 303) the time-frequency resources according to the configuration to detect whether one or more LP-WUS sequences are received.

[0097] The wireless device 300 is configured to receive (such as via the wireless interface 303 and / or using the processor circuitry 302), from the network node, a LP-WUS according to the configuration. The LP-WUS comprises a first sequence from a set of sequences. Each sequence of the set of sequences is associated with a pre-determined intended activity. The first sequence is configured to trigger a first activity of the first wireless device.

[0098] Processor circuitry 302 may be configured to perform any of the operations disclosed in Fig. 3.

[0099] The wireless interface 303 is configured for wireless communications via a wireless communication system, such as a 3GPP system, such as a 3GPP system supporting one or more of: 6G or beyond radio systems, New Radio, NR, Long Term Evolution, LTE, Narrow-band loT, NB-loT, and Long Term Evolution - enhanced Machine Type Communication, LTE-M, and 3GPP system operated in licensed bands or unlicensed bands.

[0100] The operations of the first wireless device 300 may be embodied in the form of executable logic routines (for example, lines of code, software programs, etc.) that are stored on a non-transitory computer readable medium (for example, memory circuitry 301 ) and are executed by processor circuitry 302).

[0101] Furthermore, the operations of the first wireless device 300 may be considered a method that the wireless device 300 is configured to carry out. Also, while the described functions and operations may be implemented in software, such functionality may also be carried out via dedicated hardware or firmware, or some combination of hardware, firmware and / or software.

[0102] Memory circuitry 301 may be one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, a random-access memory (RAM), or another suitable device. In a typical arrangement, memory circuitry 301 may include a non-volatile memory for long term data storage and a volatile memory that functions as system memory for processor circuitry 302. Memory circuitry 301 may exchange data with processor circuitry 302 over a data bus. Control lines and an address bus between memory circuitry 301 and processor circuitry 302 also may be present (not shown in Fig. 5). Memory circuitry 301 is considered a non- transitory computer readable medium.

[0103] Memory circuitry 301 may be configured to store information (such as information indicative of second set of paging resources) in a part of the memory.

[0104] Fig. 6 illustrates an example scenario where an example technique as disclosed herein is applied. Fig. 6 shows an example time and / or frequency resource multiplexing, such as LP-WUS resource multiplexing. In other words, Fig. 6 may show an arrangement of resource IDs according to a resource ID pattern. In Fig. 6, a plurality of resource IDs have been mapped and / or associated with different time-frequency resource blocks or fields to create a grid or matrix of time-frequency resource blocks or fields, each being associated with resource ID. The X-axis shows the time, and the Y-axis shows the frequency. As may be observed in Fig. 6, the time-frequency resources are multiplexed and the resources IDs (I D#1 , ID#2 etc.) arranged from the top left resource (I D#1 ) and then by frequency domain first and then followed by the time domain. The resource IDs may be arranged in different ways, e.g., different starting points and different patterns. For example, the resource IDs may for start from the bottom left instead. Furthermore, the pattern may be arranged with the time domain first and then the frequency domain. By assigning resource IDs to the wireless devices, each wireless device may only need to monitor one field (such as one timefrequency resource block) to detect whether the wireless device shall wake-up or not. By knowing the resource ID pattern, a wireless device may know which time-frequency resource to monitor and in turn which LP-WUS sequence is targeting the wireless device.

[0105] Fig. 7 shows a signaling diagram where a technique as disclosed herein is applied. Fig. 7 shows an example scenario for enabling low power operation of a wireless device, such as a first wireless device as disclosed herein. Fig. 7 shows a signaling diagram of an example communication 700 between a network node 400, for example a gNB, and a first WD 300, or UE. For ease of description, a single UE will be used for discussion purposes, but it should not be construed as limiting the type nor number of WD in the system. The network node 400 may for example communicate with a group of wireless devices as disclosed herein.

[0106] The first wireless device 300 may transmit 702 to the network node 400 information indicating a radio capability of the first wireless device 300. For example, the information indicating the radio capability of the first wireless device 300 may include an indication of a low power operation capability, e.g., a low power receiver capability. In other words, in this example, the radio capability of the first wireless device may indicate that the first wireless device comprises a LP- WuRx. The radio capability is further described herein. The transmission 702 may correspond to the receiving S102 of Figs. 2A-2B and the transmitting S202 of Fig. 3.

[0107] Optionally, the network node 400 determines 703 a plurality of resource IDs by using time and / or frequency resource multiplexing. In other words, the network node 400 determines a first resource ID for the first wireless device 300. Formulated differently, the network node 400 may identify 703 a resource with a resource ID. In one or more examples or embodiments, the configuration indicates a first resource identification, ID, associated with the first wireless device 300. In one or more examples or embodiments, the network node 400 identifies a resource by its representation in time and frequency, i.e., without determining resource IDs. The determination 703 may correspond to the determining S112 of Figs. 2A-2B.

[0108] The network node 400 transmits 704, to the first wireless device 300, information indicative of a configuration. The configuration identifies time-frequency resources for the first wireless device 300 to monitor for one or more LP-WUS sequences. The configuration may be seen as an LP- WUS configuration, e.g., a configuration that may identify one or more time-frequencies resource pattern sequences for decoding purposes. The transmission 704 may correspond to S114 of Figs. 2A-2B and / or S214 of Fig. 3.

[0109] Optionally, the network node 400 may obtain information indicative of an operation state of the first wireless device 300. In one or more examples or embodiments, the information indicative of the operation state is received from the first wireless device 300. In connected mode the network node (such as gNB) may be aware of the operation mode / state of the wireless device (such as first wireless device). In Idle mode, the network node (such as AMF) may be aware of a connection / operation mode / state of the wireless device. In the latter case, the information indicative of the operation state of a wireless device may be indicated implicitly when the AMF triggers the base station (such as gNB) to transmit the LP-WUS to the wireless device, e.g., in case of paging. The configuration may be based on the operation state. Optionally, the network node 400 selects an idle mode configuration 705 or a connected mode configuration 707.

[0110] If an idle mode configuration 705 is selected, the network node 400 may transmit 706 an idle mode DRX configuration to the first wireless device 300. The idle mode configuration 705 may for example indicate a resource ID and / or a release of the first wireless device 300 to an idle mode.

[0111] If, however, a connected mode configuration 707 is selected, the network node 400 may transmit 708 a C-DRX configuration. The connected mode configuration 707 may for example indicate a resource ID and / or indicate to the first wireless device 300 to remain in or return to a connected mode.

[0112] The first wireless device 300 may then monitor 709 the time-frequency resources according to the received configuration to detect whether one or more LP-WUS sequences are received. This monitoring 709 may correspond with the monitoring S215 of Fig. 3.

[0113] In one or more examples or embodiments, a group of wireless devices monitor according to the received one or more configurations to detect whether one or more LP-WUS sequences are received. The time-frequency resources may be seen as specific to the first wireless device 300 and / or to the group of wireless devices.

[0114] The network node 400 transmits 710, to the first wireless device 300, a LP-WUS according to the configuration. The LP-WUS comprises a first sequence from a set of sequences, wherein each sequence of the set of sequences is associated with a pre-determined intended activity, and wherein the first sequence is configured to trigger a first activity of the first wireless device. The transmitting 710 may corresponds with the transmitting S116 of Figs. 2A-2B and the reception S216 of Fig. 3.

[0115] Optionally, the first wireless device 300 performs 711 the first activity in accordance with the LP- WUS. In other words, in response to the transmittal, the first wireless device 300 may then determine, based on the purpose identified from the received LP-WUS, if the sequence detected triggers an activity. If so, then the first wireless device 300 may perform the first activity in accordance with the LP-WUS. The performing 711 may correspond with the performing S218 of Fig. 3.

[0116] Examples of methods and products (network node and wireless device) according to the disclosure are set out in the following items:

[0117] Item 1 . A method (100), performed by a network node, for enabling low power operation of a wireless device, the method comprising: transmitting (S114), to a first wireless device, information indicative of a configuration, wherein the configuration identifies time-frequency resources for the first wireless device to monitor for one or more LP-WUS sequences; and transmitting (S116), to the first wireless device, a LP-WUS according to the configuration, wherein the LP-WUS comprises a first sequence from a set of sequences, wherein each sequence of the set of sequences is associated with a pre-determined intended activity, and wherein the first sequence is configured to trigger a first activity of the first wireless device.

[0118] Item 2. The method according to item 1 , the method comprising: receiving (S102), from the first wireless device, information indicative of radio capability of the first wireless device, and wherein the configuration is based on the radio capability of the first wireless device.

[0119] Item 3. The method according to any of the previous items, the method comprising: receiving (S104), from the first wireless device, information indicative of an operation state of the first wireless device, and wherein the configuration is based on the operation state.

[0120] Item 4. The method according to any of the previous items, wherein the time-frequency resources are for exclusive use by the first wireless device.

[0121] Item 5. The method according to any of the previous items, wherein the configuration indicates a time-frequency resource pattern.

[0122] Item 6. The method according to any of the previous items, the method comprising obtaining (S106) information of a mapping between the set of sequences and the predetermined intended activities.

[0123] Item 7. The method according to any of the previous items, the method comprising selecting (S108) a sequence based on a pre-determined intended activity associated with the sequence. item 7a. The method according to any of the previous items, wherein the configuration indicates how to determine the first activity based on the first sequence.

[0124] Item 8. The method according to any of the previous items, wherein the configuration indicates a first resource identification, ID, associated with the first wireless device.

[0125] Item 9. The method according to any of the previous items, the method comprising: determining (S112) a plurality of resource IDs by using time and / or frequency resource multiplexing; and transmitting (S114A), to a group of wireless devices, one or more configurations, wherein the one or more configurations identify time-frequency resources for the group of wireless devices to monitor for one or more LP-WUS sequences, and wherein each wireless device of the group of wireless devices is assigned a resource ID of the plurality of resource IDs. Item 10. The method according to item 10, wherein the time-frequency resources are to be monitored by the group of wireless devices.

[0126] Item 11. The method according to any of items 8-10, wherein the plurality of resource IDs are arranged according to a resource ID pattern based on the time and / or frequency resource multiplexing.

[0127] Item 12. The method according to item 11 , the method comprises indicating (S108) the resource ID pattern to the first wireless device.

[0128] Item 13. The method according to any of the previous items, wherein the pre-determined intended activity comprises one or more of: switching on a main receiver of the first wireless device and start listening to paging, switching on a transmitter of the first wireless device and perform an uplink transmission, performing a jitter handling, switching on a main receiver and monitoring an upcoming Connected Mode Discontinuous Reception, cDRX, active period, advancing or delaying switching on a main receiver associated to advancing or delaying monitoring an upcoming cDRX active period, and preventing a main receiver from switching on a main receiver or transmitter.

[0129] Item 14. The method according to any of the previous items, wherein the first sequence is associated with one or more of: a request for switching on a main receiver of the first wireless device and start listening to paging, a request for switching on a transmitter of the first wireless device and perform an uplink transmission, a request for a jitter handling, a request for switching on a main receiver and monitoring an upcoming Connected Mode Discontinuous Reception, cDRX, active period, a request for advancing or delaying switching on a main receiver associated to advancing or delaying monitoring an upcoming cDRX active period, and a request for preventing a main receiver from switching on a main receiver or transmitter.

[0130] Item 15. The method according to any of the previous items, wherein the first sequence comprises information related to the first wireless device. Item 16. A method (200), performed by a first wireless device, for enabling low power operation, the method comprising: receiving (S214), from a network node, information indicative of a configuration, wherein the configuration identifies time-frequency resources for the first wireless device to monitor for one or more LP-WUS sequences; monitoring (S215) the time-frequency resources according to the configuration to detect whether one or more LP-WUS sequences are received; and receiving (S216), from the network node, a LP-WUS according to the configuration, wherein the LP-WUS comprises a first sequence from a set of sequences, wherein each sequence of the set of sequences is associated with a pre-determined intended activity, and wherein the first sequence is configured to trigger a first activity of the first wireless device.

[0131] Item 17. The method according to item 17, the method comprising transmitting (S202), to the network node, information indicative of radio capability of the first wireless device, and wherein the configuration is based on the radio capability of the first wireless device.

[0132] Item 18. The method according to any of items 17-18, the method comprising transmitting (S204), to the network node, information indicative of an operation state of the first wireless device, and wherein the configuration is based on the operation state.

[0133] Item 19. The method according to any of items 17-19, the method comprising receiving (S210), from the network node, an indication of a resource ID pattern to the first wireless device, and detecting (S211) the first sequence based on the resource ID pattern.

[0134] Item 20. The method according to any of items 17-20, the method comprising obtaining (S208) information of a mapping between the set of sequences and the pre-determined intended activities.

[0135] Item 21. The method according to any of items 17-21 , the method comprising performing (S218) the first activity in accordance with the LP-WUS.

[0136] Item 22. A network node comprising memory circuitry, processor circuitry, and a wireless interface, wherein the radio network node is configured to perform any of the methods according to any of items 1-16.

[0137] Item 23. A first wireless device comprising memory circuitry, processor circuitry, and a wireless interface, wherein the wireless device is configured to perform any of the methods according to any of items 17-22. The use of the terms “first”, “second”, “third” and “fourth”, “primary”, “secondary”, “tertiary” etc. does not imply any particular order, but are included to identify individual elements. Moreover, the use of the terms “first”, “second”, “third” and “fourth”, “primary”, “secondary”, “tertiary” etc. does not denote any order or importance, but rather the terms “first”, “second”, “third” and “fourth”, “primary”, “secondary”, “tertiary” etc. are used to distinguish one element from another. Note that the words “first”, “second”, “third” and “fourth”, “primary”, “secondary”, “tertiary” etc. are used here and elsewhere for labelling purposes only and are not intended to denote any specific spatial or temporal ordering. Furthermore, the labelling of a first element does not imply the presence of a second element and vice versa.

[0138] It may be appreciated that the figures comprise some circuitries or operations which are illustrated with a solid line and some circuitries, components, features, or operations which are illustrated with a dashed line. Circuitries or operations which are comprised in a solid line are circuitries, components, features or operations which are comprised in the broadest example. Circuitries, components, features, or operations which are comprised in a dashed line are examples which may be comprised in, or a part of, or are further circuitries, components, features, or operations which may be taken in addition to circuitries, components, features, or operations of the solid line examples. It should be appreciated that these operations need not be performed in the order presented. Furthermore, it should be appreciated that not all of the operations need to be performed. The example operations may be performed in any order and in any combination. It should be appreciated that these operations need not be performed in the order presented. Circuitries, components, features, or operations which are comprised in a dashed line may be considered optional.

[0139] Other operations that are not described herein can be incorporated in the example operations. For example, one or more additional operations can be performed before, after, simultaneously, or between any of the described operations.

[0140] Certain features discussed above as separate implementations can also be implemented in combination as a single implementation. Conversely, features described as a single implementation can also be implemented in multiple implementations separately or in any suitable sub-combination. Moreover, although features may be described above as acting in certain combinations, one or more features from a claimed combination can, in some cases, be excised from the combination, and the combination may be claimed as any sub-combination or variation of any sub-combination

[0141] It is to be noted that the word "comprising" does not necessarily exclude the presence of other elements or steps than those listed.

[0142] It is to be noted that the words "a" or "an" preceding an element do not exclude the presence of a plurality of such elements. It is to be noted that the term "indicative of" may be seen as “associated with”, “related to”, “descriptive of’, “characterizing”, and / or “defining”. The terms “indicative of”, “associated with”, “related to”, “descriptive of”, “characterizing”, and “defining” can be used interchangeably. The term “indicative of” can be seen as indicating a relation. For example, weight data indicative of weight may comprise one or more weight parameters.

[0143] It is to be noted that the word "based on" may be seen as “as a function of’ and / or “derived from”. The terms “based on” and “as a function of” can be used interchangeably. For example, a parameter determined “based on” a data set can be seen as a parameter determined “as a function of” the data set. In other words, the parameter may be an output of one or more functions with the data set as an input.

[0144] A function may be characterizing a relation between an input and an output, such as mathematical relation, a database relation, a hardware relation, logical relation, and / or other suitable relations. It should further be noted that any reference signs do not limit the scope of the claims, that the examples may be implemented at least in part by means of both hardware and software, and that several "means", "units" or "devices" may be represented by the same item of hardware.

[0145] The various example methods, devices, nodes and systems described herein are described in the general context of method steps or processes, which may be implemented in one aspect by a computer program product, embodied in a computer-readable medium, including computerexecutable instructions, such as program code, executed by computers in networked environments. A computer-readable medium may include removable and non-removable storage devices including, but not limited to, Read Only Memory (ROM), Random Access Memory (RAM), compact discs (CDs), digital versatile discs (DVD), etc. Generally, program circuitries may include routines, programs, objects, components, data structures, etc. that perform specified tasks or implement specific abstract data types. Computer-executable instructions, associated data structures, and program circuitries represent examples of program code for executing steps of the methods disclosed herein. The particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.

[0146] Although features have been shown and described, it will be understood that they are not intended to limit the claimed disclosure, and it will be made obvious to those skilled in the art that various changes and modifications may be made without departing from the scope of the claimed disclosure. The specification and drawings are, accordingly, to be regarded in an illustrative rather than restrictive sense. The claimed disclosure is intended to cover all alternatives, modifications, and equivalents.

Claims

CLAIMS1. A method (100), performed by a network node, for enabling low power operation of a wireless device, the method comprising: transmitting (S114), to a first wireless device, information indicative of a configuration, wherein the configuration identifies time-frequency resources for the first wireless device to monitor for one or more LP-WUS sequences; and transmitting (S116), to the first wireless device, a LP-WUS according to the configuration, wherein the LP-WUS comprises a first sequence from a set of sequences, wherein each sequence of the set of sequences is associated with a pre-determined intended activity, and wherein the first sequence is configured to trigger a first activity of the first wireless device.

2. The method according to any of the previous claims, the method comprising: receiving (S104), from the first wireless device, information indicative of an operation state of the first wireless device, and wherein the configuration is based on the operation state; and / or receiving (S102), from the first wireless device, information indicative of radio capability of the first wireless device, and wherein the configuration is based on the radio capability of the first wireless device.

3. The method according to any of the previous claims, wherein the time-frequency resources are for exclusive use by the first wireless device.

4. The method according to any of the previous claims, wherein the configuration indicates a time-frequency resource pattern.

5. The method according to any of the previous claims, the method comprising obtaining (S106) information of a mapping between the set of sequences and the pre-determined intended activities.

6. The method according to any of the previous claims, the method comprising selecting (S108) a sequence based on a pre-determined intended activity associated with the sequence.

7. The method according to any of the previous claims, wherein the configuration indicates how to determine the first activity based on the first sequence.

8. The method according to any of the previous claims, wherein the configuration indicates a first resource identification, ID, associated with the first wireless device.

9. The method according to any of the previous claims, the method comprising: determining (S112) a plurality of resource IDs by using time and / or frequency resource multiplexing; and transmitting (S114A), to a group of wireless devices, one or more configurations, wherein the one or more configurations identify time-frequency resources for the group of wireless devices to monitor for one or more LP-WUS sequences, and wherein each wireless device of the group of wireless devices is assigned a resource ID of the plurality of resource IDs.

10. The method according to claim 9, wherein the time-frequency resources are to be monitored by the group of wireless devices.

11. The method according to any of claims 8-10, wherein the plurality of resource IDs are arranged according to a resource ID pattern based on the time and / or frequency resource multiplexing.

12. The method according to claim 11 , the method comprises indicating (S108) the resource ID pattern to the first wireless device.

13. The method according to any of the previous claims, wherein the pre-determined intended activity comprises one or more of: switching on a main receiver of the first wireless device and start listening to paging, switching on a transmitter of the first wireless device and perform an uplink transmission, performing a jitter handling, switching on a main receiver and monitoring an upcoming Connected Mode Discontinuous Reception, cDRX, active period,advancing or delaying switching on a main receiver associated to advancing or delaying monitoring an upcoming cDRX active period, and preventing a main receiver from switching on a main receiver or transmitter.

14. The method according to any of the previous claims, wherein the first sequence comprises information related to the first wireless device.

15. A method (200), performed by a first wireless device, for enabling low power operation, the method comprising: receiving (S214), from a network node, information indicative of a configuration, wherein the configuration identifies time-frequency resources for the first wireless device to monitor for one or more LP-WUS sequences; monitoring (S215) the time-frequency resources according to the configuration to detect whether one or more LP-WUS sequences are received; and receiving (S216), from the network node, a LP-WUS according to the configuration, wherein the LP-WUS comprises a first sequence from a set of sequences, wherein each sequence of the set of sequences is associated with a pre-determined intended activity, and wherein the first sequence is configured to trigger a first activity of the first wireless device.

16. The method according to claim 15, the method comprising transmitting (S202), to the network node, information indicative of radio capability of the first wireless device, and wherein the configuration is based on the radio capability of the first wireless device.

17. The method according to any of claims 15-16, the method comprising transmitting (S204), to the network node, information indicative of an operation state of the first wireless device, and wherein the configuration is based on the operation state.

18. The method according to any of claims 15-17, the method comprising receiving (S210), from the network node, an indication of a resource ID pattern to the first wireless device, and detecting (S211) the first sequence based on the resource ID pattern.

19. The method according to any of claims 15-18, the method comprising obtaining (S208) information of a mapping between the set of sequences and the pre-determined intended activities.

20. The method according to any of claims 15-19, the method comprising performing (S218) the first activity in accordance with the LP-WUS.

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