Reception of a wake-up signal

Abstract

A user device may receive from a network node, at least one parameter associated with a wake-up signal. The user device may determine based on the at least one parameter, at least one set of prioritized cells for reception of the wake-up signal. The user device may transmit to the network node, information of the at least one set of prioritized cells.

Description

RECEPTION OF A WAKE-UP SIGNALTECHNICAL FIELD

[0001] This description relates to wireless communications.BACKGROUND

[0002] A communication system may be a facility that enables communication between two or more nodes or devices, such as fixed or mobile communication devices. Signals can be carried on wired or wireless carriers.

[0003] An example of a cellular communication system is an architecture that is being standardized by the 3rd Generation Partnership Project (3GPP). A recent development in this field is often referred to as the long-term evolution (LTE) of the Universal Mobile Telecommunications System (UMTS) radio-access technology. EUTRA (evolved UMTS Terrestrial Radio Access) is the air interface of 3GPP's Long Term Evolution (LTE) upgrade path for mobile networks. In LTE, base stations or access points (APs), which are referred to as enhanced Node AP (eNBs), provide wireless access within a coverage area or cell. In LTE, mobile devices, or mobile stations are referred to as user equipments (UE). LTE has included a number of improvements or developments. Aspects of LTE are also continuing to improve.

[0004] 5G New Radio (NR) development is part of a continued mobile broadband evolution process to meet the requirements of 5G, similar to earlier evolution of 3G and 4G wireless networks. In addition, 5G is also targeted at the new emerging use cases in addition to mobile broadband. A goal of 5G is to provide significant improvement in wireless performance, which may include new levels of data rate, latency, reliability, and security. 5G NR may also scale to efficiently connect the massive Internet of Things (loT) and may offer new types of mission-critical services. For example, ultra-reliable and low-latency communications (URLLC) devices may require high reliability and very low latency. 6G and other networks are also being developed.SUMMARY

[0005] In some aspects, the techniques described herein relate to an apparatus including: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform: receiving from a network node, at least one parameter associated with a wake-up signal; determining, based on the at least one parameter, at least one set of prioritized cells for reception of the wake-up signal; and transmitting to the network node, information of the at least one set of prioritized cells.

[0006] In some aspects, the techniques described herein relate to an apparatus including: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform: transmitting to a user device, at least one parameter associated with a wake-up signal; receiving, from the user device, information of at least one set of prioritized cells; and transmitting the wake-up signal from a cell of the at least one set of prioritized cells.

[0007] In some aspects, the techniques described herein relate to a method including: receiving, by a user device from a network node, at least one parameter associated with a wake-up signal; determining, based on the at least one parameter, at least one set of prioritized cells for reception of the wake-up signal; and transmitting to the network node, information of the at least one set of prioritized cells.

[0008] In some aspects, the techniques described herein relate to a method including: transmitting, from a network node to a user device, at least one parameter associated with a wake-up signal; receiving, from the user device, information of at least one set of prioritized cells; and transmitting the wake-up signal from a cell of the at least one set of prioritized cells.

[0009] In some aspects, the techniques described herein relate to an apparatus including: means for receiving from a network node, at least one parameter associated with a wake-up signal; means for determining, based on the at least one parameter, at least one set of prioritized cells for reception of the wake-up signal; and means for transmitting to the network node, information of the at least one set of prioritized cells.

[0010] In some aspects, the techniques described herein relate to an apparatus including: means for transmitting to a user device, at least one parameter associated with a wake-up signal; means for receiving, from the user device, information of at least one set of prioritized cells; and means for transmitting the wake-up signal from a cell of the at least one set of prioritized cells.

[0011] In some aspects, the techniques described herein relate to a non-transitory computer-readable storage medium including program instructions, when executed by an apparatus, cause the apparatus to perform: receiving from a network node, at least one parameter associated with a wake-up signal; determining, based on the at least one parameter, at least one set of prioritized cells for reception of the wake-up signal; and transmitting to the network node, information of the at least one set of prioritized cells.

[0012] In some aspects, the techniques described herein relate to a non-transitory computer-readable storage medium including program instructions, when executed by anapparatus, cause the apparatus to perform: transmitting to a user device, at least one parameter associated with a wake-up signal; receiving, from the user device, information of at least one set of prioritized cells; and transmitting the wake-up signal from a cell of the at least one set of prioritized cells.

[0013] Other example embodiments are provided or described for each of the example methods, including: means for performing any of the example methods; a non-transitory computer-readable storage medium comprising instructions stored thereon that, when executed by at least one processor, are configured to cause a computing system to perform any of the example methods; and an apparatus including at least one processor, and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform any of the example methods.

[0014] The details of one or more examples of embodiments are set forth in the accompanying drawings and the description below. Other features will be apparent from the description and drawings, and from the claims.BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG. 1 is a block diagram of a wireless network 130.

[0016] FIG. 2 is a diagram illustrating UE operations with low-power wake-up receiver.

[0017] FIG. 3 is a diagram illustrating a MC-OOK symbol at 60 kHz subcarrier spacing that gives a symbol rate of 28 ksps.

[0018] FIG. 4 is diagram illustrating a multicarrier OOK signal generation at a gNB.

[0019] FIG. 5 is a graph illustrating an example of an OOK signal inside an OFDM symbol.

[0020] FIG. 6 is a diagram illustrating an OOK receiver.

[0021] FIG. 7 is a diagram illustrating a sectorized cell deployment, where the UE is located in the centre.

[0022] FIG. 8 is a diagram illustrating an example embodiment.

[0023] FIG. 9 is a flow chart illustrating operation of an apparatus (e.g., which may be aUE or user device, or other apparatus) according to an example embodiment.

[0024] FIG. 10 is a flow chart illustrating operation of an apparatus (e.g., which may be a network node, a gNB, or other apparatus) according to an example embodiment.

[0025] FIG. 11 is a block diagram of a wireless station or node (e.g., UE, user device, AP, BS, eNB, gNB, RAN node, network node, TRP, or other node) 1300 according to an example embodiment.DETAILED DESCRIPTION

[0026] It shall be understood that although the terms “first,” “second,”. . etc., in front of noun(s) and the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another and they do not limit the order of the noun(s). For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.

[0027] As used herein, unless stated explicitly, performing a step “in response to A” does not indicate that the step is performed immediately after “A” occurs and one or more intervening steps may be included.

[0028] FIG. 1 is a block diagram of a wireless network 130. In the wireless network 130 of FIG. 1, user devices 131, 132, 133 and 135, which may also be referred to as mobile stations (MSs) or user equipment (UEs), may be connected (and in communication) with a base station (BS) 134, which may also be referred to as an access point (AP), an enhanced Node B (eNB), a gNB or a network node. The terms user device and user equipment (UE) may be used interchangeably. A BS may also include or may be referred to as a RAN (radio access network) node, and may include a portion of a BS or a portion of a RAN node, such as e.g., such as a centralized unit (CU) and / or a distributed unit (DU) in the case of a split BS or split gNB. At least part of the functionalities of a BS (e.g., access point (AP), base station (BS) or (e)Node B (eNB), gNB, RAN node) may also be carried out by any node, server or host which may be operably coupled to a transceiver, such as a remote radio head. BS (or AP) 134 provides wireless coverage within a cell 136, including to user devices (or UEs) 131, 132, 133 and 135. Although only four user devices (or UEs) are shown as being connected or attached to BS 134, any number of user devices may be provided. BS 134 is also connected to a core network 150 via a SI interface 151. This is merely one simple example of a wireless network, and others may be used.

[0029] A base station (e.g., such as BS 134) is an example of a radio access network (RAN) node within a wireless network. A BS (or a RAN node) may be or may include (or may alternatively be referred to as), e.g., an access point (AP), a gNB, an eNB, or portion thereof (such as a centralized unit (CU) and / or a distributed unit (DU) in the case of a split BS or split gNB), or other network node.

[0030] Some functionalities of the communication network may be carried out, at least partly, in a central / centralized unit, CU, (e.g., server, host or node) operationally coupledto distributed unit, DU, (e.g., a radio head / node). Thus, 5G networks architecture may be based on a so-called CU-DU split. The gNB-CU (central node) may control a plurality of spatially separated gNB-DUs, acting at least as transmit / receive (Tx / Rx) nodes. In some embodiments, however, the gNB-DUs (also called DU) may comprise e.g., a radio link control (RLC), medium access control (MAC) layer and a physical (PHY) layer, whereas the gNB-CU (also called a CU) may comprise the layers above RLC layer, such as a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) and an internet protocol (IP) layer. Other functional splits are possible too.

[0031] According to an illustrative example, a BS node (e.g., BS, eNB, gNB, CU / DU, . . .) or a radio access network (RAN) may be part of a mobile telecommunication system. A RAN (radio access network) may include one or more BSs or RAN nodes that implement a radio access technology, e.g., to allow one or more UEs to have access to a network or core network (CN). Thus, for example, the RAN (RAN nodes, such as BSs or gNBs) may reside between one or more user devices or UEs and a core network. According to an example embodiment, each RAN node (e.g., BS, eNB, gNB, CU / DU, . . .) or BS may provide one or more wireless communication services for one or more UEs or user devices, e.g., to allow the UEs to have wireless access to a network, via the RAN node. Each RAN node or BS may perform or provide wireless communication services, e.g., such as allowing UEs or user devices to establish a wireless connection to the RAN node, and sending data to and / or receiving data from one or more of the UEs. For example, after establishing a connection to a UE, a RAN node or network node (e.g., BS, eNB, gNB, CU / DU, . . .) may forward data to the UE that is received from a network or the core network, and / or forward data received from the UE to the network or core network. RAN nodes or network nodes (e.g., BS, eNB, gNB, CU / DU, . . .) may perform a wide variety of other wireless functions or services, e.g., such as broadcasting control information (e.g., such as system information or on-demand system information) to UEs, paging UEs when there is data to be delivered to the UE, assisting in handover of a UE between cells, scheduling of resources for uplink data transmission from the UE(s) and downlink data transmission to UE(s), sending control information to configure one or more UEs, and the like. These are a few examples of one or more functions that a RAN node or BS may perform.

[0032] A user device or user node (user terminal, user equipment (UE), mobile terminal, handheld wireless device, etc.) may refer to a portable computing device that includes wireless mobile communication devices operating either with or without a subscriber identification module (SIM), including, but not limited to, the following types of devices:a mobile station (MS), a mobile phone, a cell phone, a smartphone, a personal digital assistant (PDA), a handset, a device using a wireless modem (alarm or measurement device, etc.), a laptop and / or touch screen computer, a tablet, a phablet, a game console, a notebook, a vehicle, a sensor, and a multimedia device, as examples, or any other wireless device. It should be appreciated that a user device may also be (or may include) a nearly exclusive uplink only device, of which an example is a camera or video camera loading images or video clips to a network. Also, a user node may include a user equipment (UE), a user device, a user terminal, a mobile terminal, a mobile station, a mobile node, a subscriber device, a subscriber node, a subscriber terminal, or other user node. For example, a user node may be used for wireless communications with one or more network nodes (e.g., gNB, eNB, BS, AP, CU, DU, CU / DU) and / or with one or more other user nodes, regardless of the technology or radio access technology (RAT). In LTE (as an illustrative example), core network 150 may be referred to as Evolved Packet Core (EPC), which may include a mobility management entity (MME) which may handle or assist with mobility / handover of user devices between BSs, one or more gateways that may forward data and control signals between the BSs and packet data networks or the Internet, and other control functions or blocks. Other types of wireless networks, such as 5G (which may be referred to as New Radio (NR)) may also include a core network.

[0033] In addition, the techniques described herein may be applied to various types of user devices or data service types, or may apply to user devices that may have multiple applications running thereon that may be of different data service types. New Radio (5G) development may support a number of different applications or a number of different data service types, such as for example: machine type communications (MTC), enhanced machine type communication (eMTC), Internet of Things (loT), and / or narrowband loT user devices, enhanced mobile broadband (eMBB), and ultra-reliable and low-latency communications (URLLC). Many of these new 5G (NR) - related applications may require generally higher performance than previous wireless networks.

[0034] loT may refer to an ever-growing group of objects that may have Internet or network connectivity, so that these objects may send information to and receive information from other network devices. For example, many sensor type applications or devices may monitor a physical condition or a status and may send a report to a server or other network device, e.g., when an event occurs. Machine Type Communications (MTC, or Machine to Machine communications) may, for example, be characterized by fully automatic data generation, exchange, processing and actuation among intelligent machines, with or withoutintervention of humans. Enhanced mobile broadband (eMBB) may support much higher data rates than currently available in LTE.

[0035] Ultra-reliable and low-latency communications (URLLC) is a new data service type, or new usage scenario, which may be supported for New Radio (5G) systems. This enables emerging new applications and services, such as industrial automations, autonomous driving, vehicular safety, e-health services, and so on. 3GPP targets in providing connectivity with reliability corresponding to block error rate (BLER) of 10-5 and up to 1 ms U-Plane (user / data plane) latency, by way of illustrative example. Thus, for example, URLLC user devices / UEs may require a significantly lower block error rate than other types of user devices / UEs as well as low latency (with or without requirement for simultaneous high reliability). Thus, for example, a URLLC UE (or URLLC application on a UE) may require much shorter latency, as compared to an eMBB UE (or an eMBB application running on a UE).

[0036] The techniques described herein may be applied to a wide variety of wireless technologies or wireless networks, such as 5G (New Radio (NR)), cmWave, and / or mmWave band networks, loT, MTC, eMTC, eMBB, URLLC, 6G, etc., or any other wireless network or wireless technology. These example networks, technologies or data service types are provided only as illustrative examples.

[0037] A user device (or UE) may measure various signals and may transmit one or more measurement reports to the network. For example, a UE may measure reference signals received from one or more network nodes (e.g., gNBs or DUs), including channel state information-reference signals (CSLRSs) and / or synchronization signal block (SSB) reference signals, demodulation references signals, and / or other reference signals. Based on received reference signals, the UE may measure various signal parameters, e.g., such as reference signal received power (RSRP), reference signal received quality (RSRQ), signal to interference plus noise ratio (SINR), received signal strength indicator (RS SI), or other signal parameter.

[0038] The PHY (physical) layer may refer to layer 1 (LI) and MAC (media access control) may refer to layer 2 (L2). RSRP, RSRQ, SINR and RSSI are signal quantities measured at layer 1 (LI). The UE may send LI measurement reports (e.g., CSI-RS reports, which include measurements of one or more signal parameters for one or more cells) to a gNB, source DU or serving cell. These LI measurement reports may be sent periodically, for example, or aperiodically. L1 / L2 measurement reports may include no averaging or filtering of measurement values or may include less averaging or filtering than what isperformed for L3 measurement reports. LI (or L1 / L2) measurement reports may be transmitted by a UE to a serving network node or source DU and may cause the network node to trigger or initiate a L1 / L2 triggered mobility (LTM) handover of the UE to another cell. LI measurements (e.g., RSRP RSRQ, RSSI) may be provided or reported periodically to the DU (MAC / PHY).

[0039] In an example, a user device, a UE, and / or the like may be an Internet of things (loT) device. For example, the loT device may have limited power or energy sources.The loT device may be expected to operate for extended period of time with a small battery that may include small rechargeable and non- rechargeable single coin-sized batteries, such as those used for sensors and actuators that are deployed for monitoring, measuring, and / or the like. The batteries may not be rechargeable and may be expected to last for at least few years. Some examples of loT devices may include wearable devices such as smart watches, rings, eHealth related devices, medical monitoring devices, and / or the like. In addition, some UEs (or loT devices) may have stringent delay or latency requirements. For example, latency and delay may be critical in operation of fire detection sensors and fire extinguishing equipment. In an example, to save power in loT devices, extended discontinues reception (eDRX) may be employed. The eDRX may determine time intervals for the UE to wake-up and listen to paging messages based on a paging occasion. The eDRX may reduce the average power consumption by extending a period of time that UE is in a power-sleep mode. However, implementation of eDRX based schemes may cause problems for delay sensitive operations because the UE may be in the power-sleep state (or power-sleep mode) and thus the UE may not be responsive to a critical command, request, or a time sensitive operation.

[0040] FIG. 2 is a diagram illustrating UE operations with low-power wake-up receiver. In an example embodiment, a wake-up signal (WUS) may be employed to trigger activation of a low-power (LP) receiver. In an example, the WUS may include a low power WUS (LP-WUS). In an example, the WUS may trigger the UE to turn on a main radio (or a main receiver) to listen to paging messages. As a result, the main radio may remain in power-off state and does not turn on unnecessarily, when there is no need to listen to a paging message. For example, the main radio of the UE may remain in a power-sleep mode (or even a powered-off mode) for power saving and become activated (or turned on) only upon the reception of the WUS from the network or a network node such as a gNB, a cell of a base station, and / or the like. In an example, the network node may trigger the UE to wake-up exactly when needed in an event-driven manner, by transmitting a WUS to the UE. The WUS may be monitored by a dedicated low-power (LP) receiver at the UE. When a UE receivesthe WUS, the LP receiver may trigger the wake-up of the main radio (e.g., a transceiver). Thus, the LP receiver may wake-up the main radio and otherwise, the main radio remains in power-off mode or in a power-sleep (e.g., a deep sleep mode). For example, the LP receiver may be operated in a default power-on state (e.g., an always-on state) with very low power consumption. In an example, the LP receiver may consume significantly less power compared to the main radio, by designing a dedicated hardware for monitoring of the WUS.

[0041] In an example embodiment, the WUS and the LP receiver may operate based on an on-off keying (00 K) modulation scheme. In an example, the OOK may be a modulation scheme that varies the power level of the carrier signal between two discrete power levels. An OOK signal may be transmitted by the network node without any hardware modifications. In an example implementation, the OOK signal may be implemented based on an orthogonal frequency division multiplexing (OFDM), where a set of subcarriers may be switched to ON or OFF per OFDM symbol. In an example, when the signal includes multiple subcarriers, the modulation may be a multi-carrier OOK (MC-OOK). In an example, the LP receiver may be able to detect the symbols by detecting the signal power after filtering the subcarriers.

[0042] FIG. 3 is a diagram illustrating a MC-OOK symbol at 60 kHz subcarrier spacing that gives a symbol rate of 28 ksps. In an example, each MC-OOK symbol may last 2 OFDM symbols. In an example, the OOK signal may have a maximum symbol rate equal to half the symbol rate of the OFDM symbols in case of Manchester encoding. For 15 kHz subcarrier spacing (SCS), the maximum OOK symbol rate may be 7 ksps.

[0043] In an example, the OOK signaling may include an OFDM symbol mimicking one or more OOK ON / OFF symbols. For example, the rate of ON / OFF transitions may be at the symbol rate. In an example, the entire bandwidth may be used to transmit a portion of the Manchester encoded bit.

[0044] In an example, the OOK signaling may include discrete Fourier transform spread OFDM (DFT-s-OFDM) based OOK. The DFT-s-OFDM based OOK may include discrete Fourier transform (DFT) spreading using a M-point DFT before the final M«N point inverse fast Fourier transform (IFFT). Since multiple OOK symbols or multiple ON / OFF durations of an OOK symbol may be transmitted in an OFDM symbol depending on the LP-WUS BW, it may utilize the available spectrum efficiently.

[0045] FIG. 4 is diagram illustrating a multicarrier OOK signal generation at a gNB. In an example, to increase the spectrum efficiency and symbol rate, approximation of an OOK signal inside an OFDM symbol may be performed. The OOK signal may be up- sampled to a required sampling rate and converted to frequency domain by an M-point DFT.In an example, M may be equal to the number of subcarriers allocated for the WUS signal. In an example, K may be the number of 00K ON / OFF symbols per OFDM symbol.

[0046] FIG. 5 is a graph illustrating an example of an OOK signal inside an OFDM symbol. In an example, the OOK signal may be down-converted such that the OOK signal is converted to direct current (DC) independent of the selected subcarriers for the signal. In an example, an ideal OOK signal may be a square wave. In an example, the OOK signal may be represented by using the M-point DFT approach.

[0047] FIG. 6 is a diagram illustrating an OOK receiver. In an example, a (MC-)OOK receiver may be implemented at the UE. The received radio frequency (RF) signal may be filtered and amplified before down-converting to baseband (BB) or intermediate frequency (IF). The BB low pass filter (LPF) or bandpass filter (BPF) may remove signals outside the required (or desired) signal before it is fed to the 1 -bit analog to digital converter (ADC).

[0048] In existing technologies, low power (LP) receivers may be employed such that when a WUS is received, the LP receiver may trigger activation of main radio of the UE. When the main radio is activated or turned on, the UE may monitor for a paging message to be received from the network node or the gNB. Although using the WUS and the OOK modulation scheme reduces complexity, radio resource overhead may still be significant. In an example, when a tracking area is large and sending the WUS to the UE requires broadcast to all the cells that cover the tracking area, radio resource overhead may be significantly increased. In other words, the UE may be in a radio resource control (RRC) IDLE mode or RRC-IDLE state and when the UE is in the RRC-IDLE state, the UE may move and change location within the tracking area without informing the network or the gNB. As a result, when the UE should be woken up, the UE may be located in a coverage of a different cell since a last communication with the network while in RRC-INACTIVE state. Thus, to wake-up the UE, the network may need to expand the area of broadcasting the WUS by transmitting the WUS from (or via) more cells. Therefore, when the network transmits or broadcasts the WUS to larger areas via more cells, radio resource overhead may increase, and this may cause inefficient utilization of resources. In another example, to wake-up the UE, the network may need to fallback to paging when the WUS operation fails due to mobility of the UE. Therefore, when paging is performed and the WUS is not used, then benefits of using the LP receiver and the WUS may be diminished. In other words, escalating (extending, or expanding) transmission of the WUS to an entire tracking area would involve significant radio resource overhead as well as increased probability of false alarms (increased false alarm ratio (FAR)) triggered in any UE listening for WUS on a particular WUS wake-up occasion.

[0049] Example embodiments are directed to enhancements of UE and network operations to enable the UE to stay in WUS mode after cell reselection (e.g., due to mobility or dynamics of channel) without requiring the network to broadcast the WUS in a complete tracking area. In an example, a UE (an loT device, or a user device) may receive from a network node (e.g., a gNB), at least one parameter associated with a wake-up signal (WUS). The UE may determine, based on the at least one parameter, at least one set of prioritized cells for reception of the WUS. In an example, the UE may transmit to the network node, information of the at least one set of prioritized cells. In an example, the UE may receive the WUS from a cell of the at least one set of prioritized cells. Therefore, when an example embodiment is implemented, the network may broadcast the WUS from the cells that were indicated by the UE and not the entire tracking area. As a result, the network may incur less radio resource overhead because the WUS broadcast is from (or via) a limited number of cells indicated by the UE as prioritized cells.

[0050] In other words, when example embodiments are implemented, the network may use assistance information such as the at least one set of prioritized cells to know which cells to prioritize for the broadcast of WUS, thus reducing the wake-up latency. In addition, when example embodiments are implemented, the area in which the WUS is broadcast may be reduced thereby reducing the overhead in terms of radio resources spend on the broadcast as well as reducing the overall risk of false alarms for the wake-up request in the UEs which are sharing the same WUS monitoring occasion. Furthermore, while the UE stays within the cells of the at least one set of prioritized cells, the UE may do cell reselection and (re)enter LP-WUS mode. In other words, the UE may only need to fallback to normal paging reception if it moves outside the area of the cells of the at least one set of prioritized cells. Finally, the network may avoid escalating the WUS to the entire tracking area and thereby avoid spending radio resources on the broadcast in all the cells of the tracking area.

[0051] In an example embodiment, the at least one set of prioritized cells may include at least one of a first set of prioritized cells, and / or a second set of prioritized cells. In an example, the information of the at least one set of prioritized cells may include an identifier of a cell (e.g., identifiers of one or more cells) associated with the at least one set of prioritized cells. In an example implementation, the information of the at least one set of prioritized cells may further include a priority indication, a priority value, and / or the like, associated with each set of the at least one set of prioritized cells. For example, the priority value may be a numeric value, an integer value, and / or the like. For example, a set with a greater priority value may have higher priority than a set with a lower priority value.

[0052] In an example embodiment, the at least one set of prioritized cells may include two or more sets of prioritized cells. In an example, the two or more sets of prioritized cells may be prioritized based on a priority order. In an example implementation, the UE may transmit the at least one set of prioritized cells based on the order of priority (first priority set may be transmitted first, second priority set may be transmitted next, . . .). In an example, the priority order may determine from which set of prioritized cells a cell will be determined for receiving the WUS. In other words, the network may determine to broadcast the WUS from (or via) cells of a higher priority set of prioritized cells. In an example, if the first set of prioritized cells has a higher priority than the second set of prioritized cells, the network node or the gNB may broadcast the WUS from cells of the first set of prioritized cells. Then, if the UE is not in a coverage area of the cells of the first set of prioritized cells, then the network may broadcast the WUS from cells of the second set of prioritized cells.

[0053] In an example embodiment, the at least one parameter may include at least one of: a maximum number of sets (or supported sets) of prioritized cells, a maximum number of cells per set of prioritized cells, a wake-up latency value associated with each cell of the set of prioritized cells, and / or the like. For example, the UE may determine at least one set of prioritized cells. In an example, a number of cells of the set of prioritized cells may be less than or equal to the maximum number of cells per set of prioritized cells.

[0054] In an example embodiment, the determining of the at least one set of prioritized cells may be based on a wake-up latency value associated with each cell of the at least one set of prioritized cells. In an example, a set of prioritized cells may include one or more cells with equal wake-up latency values. In an example, the determining of the at least one set of prioritized cells may be based on at least one of signal quality measurements with respect to a cell of the at least one set of prioritized cells, collected information based on most recent selected cells, a cell reselection procedure, location information of the UE, and / or the like.

[0055] In an example embodiment, the UE may receive a paging message from the cell of the at least one set of prioritized cells. For example, the UE may receive the WUS, and the WUS may trigger the main radio (or the main receiver) to turn on. The main radio may listen (or monitor) for a paging message. Then the UE may receive the paging message from the cell.

[0056] In an example embodiment, the wake-up latency may be the time that it takes to wait for the next coming WUS wake-up occasion plus the time gap needed from receiving the wake-up request until the main radio is turned on and ready to receive paging. The WUS wake-up occasion may be the time window where the wake-up receiver is listening for thewake-up request. If a first WUS does not reach the UE because the UE has reselected a cell outside the at least one set of prioritized cells, then there is an additional latency which is based on: detecting that the UE did not respond to the paging message (no connection setup by the UE), and a latency for the first wake-up request (e.g., waiting for an upcoming WUS occasion plus time gap for waking up the main radio and become ready for reception of the paging message).

[0057] In an example, the UE may determine to update the information of the at least one set of prioritized cells. The UE may send to the network node the update of the information of the at least one set of prioritized cells based on (or in response to) at least one of: receiving a paging message from the cell of the at least one set of prioritized cells, and / or establishment of a mobile originated connection by the UE. For example, the UE may receive the paging message without a WUS when the UE is not in a WUS coverage. As a result, the UE may determine to update the information of the at least one set of prioritized cells. In an example, a determining of whether or not the UE is in the WUS coverage, may be based on a periodic low power synchronization signal (LP-SS). In an example, if the UE is not able to receive the LP-SS with a given quality (e.g., based on a LP-RSRP and / or a LP-RSRQ being above a threshold or a WUS entry criteria), then the UE may exit a WUS mode of operation and fallback to normal periodic paging reception by the main radio (MR) or the main receiver. In an example, if the low power receiver (LR) supports synchronization signal block (SSB) reception, the WUS coverage may be based on normal RSRP and / or RSRQ level.

[0058] In an example, it may be advantageous that the UE evaluates if there is a need to update (and send to the network node) the at least one set of prioritized cells whenever the UE is paged. In an example, if the UE receives the paging message from a cell not included in the at least one set of prioritized cells, then it means that the UE has moved outside the area covered by the cells of the at least one set of prioritized cells and therefore the UE may update (and transmit to the network node) the at least one set of prioritized cells accordingly.

[0059] In an example, if the UE is woken up and the paging message is received from a low priority cell (or a cell of a lower priority set), then the UE may determine to update the at least one set of prioritized cells and transmit the updated at least one set of prioritized cells to the network node. In other words, when the UE receives the paging message from a low priority cell, it may be indicative of the UE movement away from a coverage of high priority cells. In other words, it means that UE has moved away from the highest priority cells.

[0060] In an example embodiment, the UE may determine to turn on the main radio or the main receiver for reception of a paging message until a cell of the at least one set ofprioritized cells is selected. In an example, the determining to turn on the main radio may be based on selection of a cell excluded from the at least one set of prioritized cells. In an example, the selection of the cell excluded from the at least one set of prioritized cells may be based on a mobility of the UE, channel conditions, and / or the like.

[0061] In an example embodiment, the UE may transmit to the network node a capability indication of WUS support. In an example, the receiving of the at least one parameter may be based on the capability indication. The UE may transmit the capability indication to the network node via a RRC message, a non-access stratum (NAS) message, and / or the like. The capability indication may be transmitted to the network node, e.g., a base station, a gNB, and / or the like. The NAS message may be transmitted to a core network node such as an access and mobility management function (AMF) via the gNB. In an example, the at least one parameter associated with the WUS may be received by the UE from the network node via a RRC message.

[0062] In an example, the UE may provide assistance information to the network node. The assistance information may include information of the at least one set of prioritized cells (or a list of one or more prioritized set of cells), from which the UE expects to receive broadcast of the WUS (or low power WUS (LP-WUS)). In an example, the network may specify a maximum number of sets (or supported sets) of prioritized cells, and / or a maximum number of cells per set of prioritized cells (e.g., a maximum number of prioritized sets as well as a maximum number of cells in each set), and the UE may determine or decide which cells to add to each set. If the UE moves to a cell which is not included in the specified sets of (prioritized) cells, then the UE may fall back to legacy paging reception (e.g., listening to paging early indicator (PEI) or downlink channel information (DCI) with cyclic redundancy check (CRC) scrambled by PS-RNTI (DCP)).

[0063] In an example, the WUS message, may be transmitted by broadcast, multicast, unicast, and / or the like. The WUS may be directed or transmitted to a specific UE or to a group of UEs based on a UE identifier, a group identifier (group ID), a multicast address, and / or the like.

[0064] FIG. 7 is a diagram illustrating a sectorized cell deployment, where the UE is located in the centre. In an example, the UE may detect high signal quality, medium signal quality and low signal quality for some cells. For example, the UE may indicate the cells with the highest quality (or strongest) signal as first priority set of prioritized cells (e.g., the first set of prioritized cells), the medium quality cells as second priority (the second set of prioritized cells), and / or the like. In an example, the network may first broadcast the WUSfrom the first set of prioritized cells. If the network does not receive a response from the UE, the network may broadcast from the second set of prioritized cells. If the UE is not able to receive low power synchronization signal and the WUS from any of the cells in the provided sets, then the UE may not rely on the WUS and may fallback to normal periodic paging reception by the main radio or the main receiver.

[0065] FIG. 8 is a diagram illustrating an example embodiment. In the example of FIG. 8, the maximum number of sets (or supported sets) of prioritized cells is 2, and the maximum number of cells per set of prioritized cells is 2. Furthermore, cell A and cell B are part of a first priority (highest priority) set, and cell C and cell D are part of a second priority set. Stepl may include signaling procedures for initial access of the UE to the network such as a random access procedure, RRC signaling and registration of the UE with the network. At step 2, the network may request UE capability information. At step 3, the UE may indicate or report that the UE supports WUS wake-up assistance (e.g., capability indication of WUS support). At step 4, the network may inform (e.g., via a RRC message, a RRC reconfiguration message, and / or the like) the UE (e.g., based on the capability indication of WUS support) maximum number of sets (or supported sets) of prioritized cells, and / or a maximum number of cells per set of prioritized cells (e.g., the maximum number of prioritized sets as well as the maximum number of cells per set). In an example, the RRC message or the RRC reconfiguration message may include a parameter for a wake-up latency value associated with each cell of the set of prioritized cells. In an example, the wake-up latency value may be associated to all cells of the set of prioritized cells. In an example, the wake-up latency value may be provided by the network node dynamically or statically, or determined by the UE. At step 5, the UE may determine the at least one set of prioritized cells (e.g., the cells for each set of prioritized cells). The UE may transmit to the network node, information of the at least one set of prioritized cells. In an example, if a latency value for a specific set of prioritized cells exceeds a tolerable or acceptable value, then the UE may not provide any cells for that specific set of prioritized cells. For example, in this case the UE may fallback to normal paging reception for the cells for which the latency value exceeds the acceptable value.

[0066] At step 6 of FIG. 8, a paging procedure (including the WUS wake-up request) may be triggered by a core network node (such as the AMF). At step 7, the core network node may request a paging broadcast in an initial paging area, which may be a superset of the first set of prioritized cells (e.g., cell A and cell B). In an example, if the UE has only provided last active cells in the first set of prioritized cells, then the network may decide tobroadcast in a larger area, knowing that the UE may perform legacy paging reception (e.g., not requiring WUS wake-up request). At step 8, the WUS request may not be received by the UE because the UE may have moved from the coverage of cell A and / or cell B. As a result, in step 9, the UE may not receive the paging message from cell A and cell B and the paging procedure may also fail. At this stage the main radio or the main receiver of the UE may not be activated or woken up. At step 10, the core network node may determine to escalate (extended) the broadcast of the paging message from the cells of the second set of prioritized cells (e.g., with second priority level). As a result, in step 11, the network, the network node, and / or the core network node may trigger paging request from cells of the second set of prioritized cells (e.g., cell C and / or cell D). At step 12, the UE may receive the WUS. The UE may turn on the main radio or the main receiver for reception of the paging request / message. At step 13, the UE may receive the paging message from the cells of the second set of prioritized cells.

[0067] At step 14 of FIG. 8, the UE may determine to update the WUS wake-up assistance information after entering RRC-connected state / mode. In an example, the UE may transmit an update of the information of the at least one set of prioritized cells based on at least one of: receiving a paging message from the cell of the at least one set of prioritized cells, establishment of a mobile originated connection, and / or the like. The UE may determine to update the information of the at least one set of prioritized cells when the UE has detected that it was woken up on a cell which was not in the at least one set of prioritized cells. At step 15, the UE may transmit to the network node (e.g., core network node), an update of the information of the at least one set of prioritized cells.

[0068] In an example embodiment, the UE may provide the network node information of the at least one set of prioritized cells. The cells of the at least one set of prioritized cells may be employed by the network node to transmit or broadcast the WUS to the UE. In an example, each set of the at least one set of prioritized cells may be assigned a priority. The highest priority set of prioritized cells will be used first to broadcast the WUS. If the UE cannot be reached via the first set with the highest priority, then the WUS may be broadcast from a set of prioritized cells with second highest priority, e.g., lower priority that the first set with highest priority.

[0069] In an example, if the UE is not able to receive the LP-SS / SSB, then the UE may fallback to normal paging reception for each discontinuous reception (DRX) period. The UE may be able to perform cell reselection without turning on the main radio or the main receiver. In an example, the network may determine or decide the maximum number of sets(or supported sets) of prioritized cells, and / or the maximum number of cells per set of prioritized cells. The maximum number of sets (or supported sets) of prioritized cells may determine the maximum number of retransmissions (escalations) of wake-up message (e.g., WUS) by the network node or cells. In an example, for each escalation, the network broadcasts the wake-up message to an additional set of cells (e.g., the set with the highest priority of the remaining sets).

[0070] In an example embodiment, the network may determine or decide how many “escalations” of the wake-up message to broader areas it wants to support, e.g., in the same way as the network may decide or determine how many “escalations” of the paging message the network may support. The network may inform the UE that the network may support a certain number of escalations. For each escalation, the network may broadcast the wake-up message to an additional set of cells (e.g., the set with the highest priority of the remaining sets). In other words, the maximum number of sets of prioritized cells may be indicative of maximum number of escalations. In an example, the network may stop further escalation(s) when the network receives a response from the UE (e.g., a PRACH). In an example, the maximum number of cells per set of prioritized cells may be indicative of the maximum overhead from the WUS wake-up messages. This way the network may decide on the maximum overhead from WUS wake-up messages it wants to offer.

[0071] When the UE knows the number of priority sets as well as cells per priority, then it can construct those sets, e.g. based on statistics collected over a certain time window about which cells it has camped on for how long and how often.

[0072] In an example, the maximum number of cells per set of prioritized cells may determine a worst-case resource overhead of the WUS transmission. In an example, the UE may determine to create sets for all priorities or only the highest priority set(s). The number of created priority sets will influence the maximum latency, since the network will broadcast the wake-up message on the cells belonging to a single set at a time. In an example, if a primary serving cell of a RRC-connected mode UE is not included in the set of cells with highest priority (e.g., in the at least one set of prioritized cells), then the UE may not be allowed to enter a low power WUS (LP-WUS) mode before it has informed the network about updated priority sets (e.g., in the at least one set of prioritized cells).

[0073] In an example embodiment, the UE may decide (or determine) to leave lower priority sets of cells empty if those sets are associated with higher wake-up latency than what the UE can tolerate. In an example, the UE may indicate the maximum tolerable wake-up latency to the network, and then the network may determine to dismiss lower priority sets ofcells which are associated with wake-up latencies higher than what is tolerable. For example, the network may determine not to transmit the WUS from cells of the lower priority sets.

[0074] In an example, the UE may create (or determine) based on the at least one parameter, at least one set of prioritized cells for reception of the WUS. For example, the determining of the at least one set of prioritized cells may be based on at least one of: a wakeup latency value associated with each cell of the at least one set of prioritized cells, wherein a set of prioritized cells include one or more cells with equal wake-up latency values, signal quality measurements with respect to a cell of the at least one set of prioritized cells, collected information based on most recent selected cells, a cell reselection procedure, or location information. In an example, the collected information may be based on historical learning rather than using the latest measurement results. The advantage of using historical learning may be evident in factory loT or industrial loT settings where the loT devices may move within certain areas or specific paths / routes. In an example, the UE may be an loT device with certain maximum wake-up latencies, e.g., home control where a control switch would experience a low performance if a there is a long delay between a command and action by the switch.

[0075] In an example, if the UE changes location, the UE may detect that it moved out of the at least one set of prioritized cells and therefore the UE may fall back to legacy or normal paging, e.g., based on DRX or extended DRX (eDRX). In an example, when the UE falls back to normal paging scheme, the UE may update the at least one set of prioritized cells and may inform the network once the UE transitions to RRC-CONNECTED mode / state.

[0076] In an example embodiment, if the UE selects a cell of the at least one set of prioritized cells, then the UE may have entered a coverage of the LP-WUS in that cell, which may be determined or decided based on a reception of a low power synchronization signal (LP-SS) or synchronization signal block (SSB). The LP-SS and / or the SSB signals may be periodically broadcast by the network so the UE may determine that it is in the coverage of the LP-WUS without receiving any LP-WUS wake-up signals.

[0077] FIG. 9 is a flow chart illustrating operation of an apparatus (e.g., which may be a UE or user device, or other apparatus) according to an example embodiment. At step 910, the method may include receiving, by a user device from a network node, at least one parameter associated with a wake-up signal. At step 920, the method may include determining, based on the at least one parameter, at least one set of prioritized cells for reception of the wake-up signal. At step 930, the method may include transmitting to the network node, information of the at least one set of prioritized cells.

[0078] With respect to the method of FIG. 9, the method may further include wherein the at least one set of prioritized cells includes at least one of: a first set of prioritized cells; or a second set of prioritized cells.

[0079] With respect to the method of FIG. 9, the method may further include wherein the at least one set of prioritized cells includes two or more sets of prioritized cells.

[0080] With respect to the method of FIG. 9, the method may further include: receiving the wake-up signal from a cell of the at least one set of prioritized cells.

[0081] With respect to the method of FIG. 9, the method may further include wherein the two or more sets of prioritized cells are prioritized based on a priority order, wherein the priority order determines from which set of prioritized cells a cell will be determined for receiving the wake-up signal.

[0082] With respect to the method of FIG. 9, the method may further include wherein the wake-up signal from the cell of the at least one set of prioritized cells indicates the priority order.

[0083] With respect to the method of FIG. 9, the method may further include wherein the at least one parameter includes at least one of: a maximum number of sets of prioritized cells; a maximum number of cells per set of prioritized cells; or a wake-up latency value associated with each cell of the set of prioritized cells.

[0084] With respect to the method of FIG. 9, the method may further include wherein a number of cells of the set of prioritized cells is less than or equal to the maximum number of cells per set of prioritized cells.

[0085] With respect to the method of FIG. 9, the method may further include receiving a paging message from a cell of the at least one set of prioritized cells.

[0086] With respect to the method of FIG. 9, the method may further include transmitting an update of the information of the at least one set of prioritized cells based on at least one of: receiving a paging message from a cell of the at least one set of prioritized cells; or establishment of a mobile originated connection.

[0087] With respect to the method of FIG. 9, the method may further include wherein the determining of the at least one set of prioritized cells is based on at least one of: a wake-up latency value associated with each cell of the at least one set of prioritized cells, wherein a set of prioritized cells include one or more cells with equal wake-up latency values; signal quality measurements with respect to a cell of the at least one set of prioritized cells; collected information based on most recent selected cells; a cell reselection procedure; or location information.

[0088] With respect to the method of FIG. 9, the method may further include determining to turn on a main receiver for reception of a paging message until a cell of the at least one set of prioritized cells is selected, wherein the determining is based on selection of a cell excluded from the at least one set of prioritized cells.

[0089] With respect to the method of FIG. 9, the method may further include transmitting to the network node a capability indication of wake-up signal support, and wherein the receiving of the at least one parameter is based on the capability indication.

[0090] With respect to the method of FIG. 9, the method may further include wherein the at least one parameter associated with the wake-up signal is received via a radio resource configuration message.

[0091] With respect to the method of FIG. 9, the method may further include wherein the information of the at least one set of prioritized cells comprises an identifier of a cell associated with the at least one set of prioritized cells.

[0092] FIG. 10 is a flow chart illustrating operation of an apparatus (e.g., which may be a network node, a gNB, or other apparatus) according to an example embodiment. At step 1010, the method may include transmitting, from a network node to a user device, at least one parameter associated with a wake-up signal. At step 1020, the method may include receiving, from the user device, information of at least one set of prioritized cells. At step 1030, the method may include transmitting the wake-up signal from a cell of the at least one set of prioritized cells.

[0093] With respect to the method of FIG. 10, the method may further include wherein the at least one set of prioritized cells includes at least one of: a first set of prioritized cells; or a second set of prioritized cells.

[0094] With respect to the method of FIG. 10, the method may further include wherein the at least one set of prioritized cells includes two or more sets of prioritized cells.

[0095] With respect to the method of FIG. 10, the method may further include wherein the two or more sets of prioritized cells are prioritized based on a priority order, wherein the priority order determines from which set of prioritized cells a cell will be determined for transmitting the wake-up signal.

[0096] With respect to the method of FIG. 10, the method may further include wherein the wake-up signal from the cell of the at least one set of prioritized cells indicates the priority order.

[0097] With respect to the method of FIG. 10, the method may further include wherein the at least one parameter includes at least one of: a maximum number of sets of prioritized cells; a maximum number of cells per set of prioritized cells; or a wake-up latency value associated with each cell of the set of prioritized cells.

[0098] With respect to the method of FIG. 10, the method may further include wherein a number of cells of the set of prioritized cells is less than or equal to the maximum number of cells per set of prioritized cells.

[0099] With respect to the method of FIG. 10, the method may further include transmitting a paging message from the cell of the at least one set of prioritized cells.

[0100] With respect to the method of FIG. 10, the method may further include receiving an update of the information of the at least one set of prioritized cells based on at least one of: transmitting a paging message from the cell of the at least one set of prioritized cells; or establishment of a mobile originated connection.

[0101] With respect to the method of FIG. 10, the method may further include receiving from the user device a capability indication of wake-up signal support, and wherein the transmitting of the at least one parameter is based on the capability indication.

[0102] With respect to the method of FIG. 10, the method may further include wherein the at least one parameter associated with the wake-up signal is transmitted via a radio resource configuration message.

[0103] With respect to the method of FIG. 10, the method may further include wherein the information of the at least one set of prioritized cells includes an identifier of a cell associated with the at least one set of prioritized cells.

[0104] Some examples will now be described, based on the description and figures provided herein.

[0105] Example 1. An apparatus including: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform: receiving from a network node, at least one parameter associated with a wake-up signal; determining, based on the at least one parameter, at least one set of prioritized cells for reception of the wake-up signal; and transmitting to the network node, information of the at least one set of prioritized cells.

[0106] Example 2. The apparatus of Example 1, wherein the at least one set of prioritized cells includes at least one of: a first set of prioritized cells; or a second set of prioritized cells.

[0107] Example 3. The apparatus of Examples 1 or 2, wherein the at least one set of prioritized cells includes two or more sets of prioritized cells.

[0108] Example 4. The apparatus of any of Examples 1 to 3, wherein the apparatus is further caused to perform: receiving the wake-up signal from a cell of the at least one set of prioritized cells.

[0109] Example 5. The apparatus of Example 3, wherein the two or more sets of prioritized cells are prioritized based on a priority order, wherein the priority order determines from which set of prioritized cells a cell will be determined for receiving the wake-up signal.

[0110] Example 6. The apparatus of Example 5, wherein the wake-up signal from the cell of the at least one set of prioritized cells indicates the priority order.

[0111] Example 7. The apparatus of any of Examples 1 to 6, wherein the at least one parameter includes at least one of: a maximum number of sets of prioritized cells; a maximum number of cells per set of prioritized cells; or a wake-up latency value associated with each cell of the set of prioritized cells.

[0112] Example 8. The apparatus of Example 7, wherein a number of cells of the set of prioritized cells is less than or equal to the maximum number of cells per set of prioritized cells.

[0113] Example 9. The apparatus of any of Examples 1 to 8, wherein the apparatus is further caused to perform receiving a paging message from a cell of the at least one set of prioritized cells.

[0114] Example 10. The apparatus of any of Examples 1 to 9, wherein the apparatus is further caused to perform transmitting an update of the information of the at least one set of prioritized cells based on at least one of: receiving a paging message from a cell of the at least one set of prioritized cells; or establishment of a mobile originated connection.

[0115] Example 11. The apparatus of any of Examples 1 to 10, wherein the determining of the at least one set of prioritized cells is based on at least one of: a wake-up latency value associated with each cell of the at least one set of prioritized cells, wherein a set of prioritized cells include one or more cells with equal wake-up latency values; signal quality measurements with respect to a cell of the at least one set of prioritized cells; collected information based on most recent selected cells; a cell reselection procedure; or location information.

[0116] Example 12. The apparatus of any of Examples 1 to 11, wherein the apparatus is further caused to perform determining to turn on a main receiver for reception of a paging message until a cell of the at least one set of prioritized cells is selected, wherein the determining is based on selection of a cell excluded from the at least one set of prioritized cells.

[0117] Example 13. The apparatus of any of Examples 1 to 12, wherein the apparatus is further caused to perform transmitting to the network node a capability indication of wake-up signal support, and wherein the receiving of the at least one parameter is based on the capability indication.

[0118] Example 14. The apparatus of any of Examples 1 to 13, wherein the at least one parameter associated with the wake-up signal is received via a radio resource configuration message.

[0119] Example 15. The apparatus of any of Examples 1 to 14, wherein the information of the at least one set of prioritized cells includes an identifier of a cell associated with the at least one set of prioritized cells.

[0120] Example 16. An apparatus including: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform: transmitting to a user device, at least one parameter associated with a wake-up signal; receiving, from the user device, information of at least one set of prioritized cells; and transmitting the wake-up signal from a cell of the at least one set of prioritized cells.

[0121] Example 17. The apparatus of Example 16, wherein the at least one set of prioritized cells includes at least one of: a first set of prioritized cells; or a second set of prioritized cells.

[0122] Example 18. The apparatus of Examples 16 or 17, wherein the at least one set of prioritized cells includes two or more sets of prioritized cells.

[0123] Example 19. The apparatus of Example 18, wherein the two or more sets of prioritized cells are prioritized based on a priority order, wherein the priority order determines from which set of prioritized cells a cell will be determined for transmitting the wake-up signal.

[0124] Example 20. The apparatus of Example 19, wherein the wake-up signal from the cell of the at least one set of prioritized cells indicates the priority order.

[0125] Example 21. The apparatus of any of Examples 16 to 20, wherein the at least one parameter includes at least one of: a maximum number of sets of prioritized cells; a maximum number of cells per set of prioritized cells; or a wake-up latency value associated with each cell of the set of prioritized cells.

[0126] Example 22. The apparatus of Example 21, wherein a number of cells of the set of prioritized cells is less than or equal to the maximum number of cells per set of prioritized cells.

[0127] Example 23. The apparatus of any of Examples 16 to 22, wherein the apparatus is further caused to perform transmitting a paging message from the cell of the at least one set of prioritized cells.

[0128] Example 24. The apparatus of any of Examples 16 to 23, wherein the apparatus is further caused to perform receiving an update of the information of the at least one set of prioritized cells based on at least one of: transmitting a paging message from the cell of the at least one set of prioritized cells; or establishment of a mobile originated connection.

[0129] Example 25. The apparatus of any of Examples 16 to 24, wherein the apparatus is further caused to perform receiving from the user device a capability indication of wake-up signal support, and wherein the transmitting of the at least one parameter is based on the capability indication.

[0130] Example 26. The apparatus of any of Examples 16 to 25, wherein the at least one parameter associated with the wake-up signal is transmitted via a radio resource configuration message.

[0131] Example 27. The apparatus of any of Examples 16 to 26, wherein the information of the at least one set of prioritized cells includes an identifier of a cell associated with the at least one set of prioritized cells.

[0132] Example 28. A method including: receiving, by a user device from a network node, at least one parameter associated with a wake-up signal; determining, based on the at least one parameter, at least one set of prioritized cells for reception of the wake-up signal; and transmitting to the network node, information of the at least one set of prioritized cells.

[0133] Example 29. The method of Example 28, wherein the at least one set of prioritized cells includes at least one of: a first set of prioritized cells; or a second set of prioritized cells.

[0134] Example 30. The method of Examples 28 or 29, wherein the at least one set of prioritized cells includes two or more sets of prioritized cells.

[0135] Example 31. The method of any of Examples 28 to 30, further including: receiving the wake-up signal from a cell of the at least one set of prioritized cells.

[0136] Example 32. The method of Example 30, wherein the two or more sets of prioritized cells are prioritized based on a priority order, wherein the priority order determines from which set of prioritized cells a cell will be determined for receiving the wake-up signal.

[0137] Example 33. The method of Example 32, wherein the wake-up signal from the cell of the at least one set of prioritized cells indicates the priority order.

[0138] Example 34. The method of any of Examples 28 to 33, wherein the at least one parameter includes at least one of: a maximum number of sets of prioritized cells; a maximum number of cells per set of prioritized cells; or a wake-up latency value associated with each cell of the set of prioritized cells.

[0139] Example 35. The method of Example 34, wherein a number of cells of the set of prioritized cells is less than or equal to the maximum number of cells per set of prioritized cells.

[0140] Example 36. The method of any of Examples 28 to 35, further including receiving a paging message from a cell of the at least one set of prioritized cells.

[0141] Example 37. The method of any of Examples 28 to 36, further including transmitting an update of the information of the at least one set of prioritized cells based on at least one of: receiving a paging message from a cell of the at least one set of prioritized cells; or establishment of a mobile originated connection.

[0142] Example 38. The method of any of Examples 28 to 37, wherein the determining of the at least one set of prioritized cells is based on at least one of: a wake-up latency value associated with each cell of the at least one set of prioritized cells, wherein a set of prioritized cells include one or more cells with equal wake-up latency values; signal quality measurements with respect to a cell of the at least one set of prioritized cells; collected information based on most recent selected cells; a cell reselection procedure; or location information.

[0143] Example 39. The method of any of Examples 28 to 38, further including determining to turn on a main receiver for reception of a paging message until a cell of the at least one set of prioritized cells is selected, wherein the determining is based on selection of a cell excluded from the at least one set of prioritized cells.

[0144] Example 40. The method of any of Examples 28 to 39, further including transmitting to the network node a capability indication of wake-up signal support, and wherein the receiving of the at least one parameter is based on the capability indication.

[0145] Example 41. The method of any of Examples 28 to 40, wherein the at least one parameter associated with the wake-up signal is received via a radio resource configuration message.

[0146] Example 42. The method of any of Examples 28 to 41, wherein the information of the at least one set of prioritized cells includes an identifier of a cell associated with the at least one set of prioritized cells.

[0147] Example 43. A method including: transmitting, from a network node to a user device, at least one parameter associated with a wake-up signal; receiving, from the user device, information of at least one set of prioritized cells; and transmitting the wake-up signal from a cell of the at least one set of prioritized cells.

[0148] Example 44. The method of Example 43, wherein the at least one set of prioritized cells includes at least one of: a first set of prioritized cells; or a second set of prioritized cells.

[0149] Example 45. The method of Examples 43 or 44, wherein the at least one set of prioritized cells includes two or more sets of prioritized cells.

[0150] Example 46. The method of Example 45, wherein the two or more sets of prioritized cells are prioritized based on a priority order, wherein the priority order determines from which set of prioritized cells a cell will be determined for transmitting the wake-up signal.

[0151] Example 47. The method of Example 46, wherein the wake-up signal from the cell of the at least one set of prioritized cells indicates the priority order.

[0152] Example 48. The method of any of Examples 43 to 47, wherein the at least one parameter includes at least one of: a maximum number of sets of prioritized cells; a maximum number of cells per set of prioritized cells; or a wake-up latency value associated with each cell of the set of prioritized cells.

[0153] Example 49. The method of Example 48, wherein a number of cells of the set of prioritized cells is less than or equal to the maximum number of cells per set of prioritized cells.

[0154] Example 50. The method of any of Examples 43 to 49, further including transmitting a paging message from the cell of the at least one set of prioritized cells.

[0155] Example 51. The method of any of Examples 43 to 50, further including receiving an update of the information of the at least one set of prioritized cells based on at least one of: transmitting a paging message from the cell of the at least one set of prioritized cells; or establishment of a mobile originated connection.

[0156] Example 52. The method of any of Examples 43 to 51, further including receiving from the user device a capability indication of wake-up signal support, and wherein the transmitting of the at least one parameter is based on the capability indication.

[0157] Example 53. The method of any of Examples 43 to 52, wherein the at least one parameter associated with the wake-up signal is transmitted via a radio resource configuration message.

[0158] Example 54. The method of any of Examples 43 to 53, wherein the information of the at least one set of prioritized cells includes an identifier of a cell associated with the at least one set of prioritized cells.

[0159] Example 55. An apparatus including: means for receiving from a network node, at least one parameter associated with a wake-up signal; means for determining, based on the at least one parameter, at least one set of prioritized cells for reception of the wake-up signal; and means for transmitting to the network node, information of the at least one set of prioritized cells.

[0160] Example 56. An apparatus including: means for transmitting to a user device, at least one parameter associated with a wake-up signal; means for receiving, from the user device, information of at least one set of prioritized cells; and means for transmitting the wake-up signal from a cell of the at least one set of prioritized cells.

[0161] Example 57. An apparatus including means for performing a method of any of Examples 28 to 42.

[0162] Example 58. An apparatus including means for performing a method of any of Examples 43 to 54.

[0163] Example 59. A non-transitory computer-readable storage medium including program instructions, when executed by an apparatus, cause the apparatus to perform: receiving from a network node, at least one parameter associated with a wake-up signal; determining, based on the at least one parameter, at least one set of prioritized cells for reception of the wake-up signal; and transmitting to the network node, information of the at least one set of prioritized cells.

[0164] Example 60. A non-transitory computer-readable storage medium including program instructions, when executed by an apparatus, cause the apparatus to perform: transmitting to a user device, at least one parameter associated with a wake-up signal; receiving, from the user device, information of at least one set of prioritized cells; and transmitting the wake-up signal from a cell of the at least one set of prioritized cells.

[0165] Example 61. A non-transitory computer-readable storage medium including instructions stored thereon that, when executed by at least one processor, are configured to cause a computing system to perform a method of any of Examples 28 to 42.

[0166] Example 62. A non-transitory computer-readable storage medium including instructions stored thereon that, when executed by at least one processor, are configured to cause a computing system to perform a method of any of Examples 43 to 54.

[0167] Example 63. A computer program including instructions stored thereon for performing a method of any of Examples 28 to 42.

[0168] Example 64. A computer program comprising instructions stored thereon for performing a method of any of Examples 43 to 54.

[0169] FIG. 11 is a block diagram of a wireless station or node (e.g., UE, user device, AP, BS, eNB, gNB, RAN node, network node, TRP, or other node) 1300 according to an example embodiment. The wireless station 1300 may include, for example, one or more (e.g., two as shown in FIG. 11) RF (radio frequency) or wireless transceivers 1302A, 1302B, where each wireless transceiver includes a transmitter to transmit signals and a receiver to receive signals. The wireless station also includes a processor or control unit / entity (controller) 1304 to execute instructions or software and control transmission and receptions of signals, and a memory 1306 to store data and / or instructions.

[0170] Processor 1304 may also make decisions or determinations, generate frames, packets or messages for transmission, decode received frames or messages for further processing, and other tasks or functions described herein. Processor 1304, which may be a baseband processor, for example, may generate messages, packets, frames or other signals for transmission via wireless transceiver 1302 (1302A or 1302B). Processor 1304 may control transmission of signals or messages over a wireless network, and may control the reception of signals or messages, etc., via a wireless network (e.g., after being down- converted by wireless transceiver 1302, for example). Processor 1304 may be programmable and capable of executing software or other instructions stored in memory or on other computer media to perform the various tasks and functions described above, such as one or more of the tasks or methods described above. Processor 1304 may be (or may include), for example, hardware, programmable logic, a programmable processor that executes software or firmware, and / or any combination of these. Using other terminology, processor 1304 and transceiver 1302 together may be considered as a wireless transmitter / receiver system, for example.

[0171] In addition, referring to FIG. 11, a controller (or processor) 1308 may execute software and instructions, and may provide overall control for the station 1300, and may provide control for other systems not shown in FIG. 11 , such as controlling input / output devices (e.g., display, keypad), and / or may execute software for one or more applications that may be provided on wireless station 1300, such as, for example, an email program, audio / video applications, a word processor, a Voice over IP application, or other application or software.

[0172] In addition, a storage medium may be provided that includes stored instructions, which when executed by a controller or processor may result in the processor 1304, or other controller or processor, performing one or more of the functions or tasks described above.

[0173] According to another example embodiment, RF or wireless transceiver(s) 1302A / 1302B may receive signals or data and / or transmit or send signals or data. Processor 1304 (and possibly transceivers 1302A / 1302B) may control the RF or wireless transceiver 1302 A or 1302B to receive, send, broadcast or transmit signals or data.

[0174] Example embodiments are provided or described for each of the example methods, including: An apparatus (e.g., 1300, FIG. 11) including means (e.g., processor 1304, RF transceivers 1302A and / or 1302B, and / or memory 1306, in FIG. 11) for carrying out any of the methods; a non-transitory computer-readable storage medium (e.g., memory 1306, FIG. 11) comprising instructions stored thereon that, when executed by at least one processor (processor 1304, FIG. 11), are configured to cause a computing system (e.g., 1300, FIG. 11) to perform any of the example methods; and an apparatus (e.g., 1300, FIG. 11) including at least one processor (e.g., processor 1304, FIG. 11), and at least one memory (e.g., memory 1306, FIG. 11) including computer program code, the at least one memory (1306) and the computer program code configured to, with the at least one processor (1304), cause the apparatus (e.g., 1300) at least to perform any of the example methods.

[0175] Embodiments of the various techniques described herein may be implemented in digital electronic circuitry, or in computer hardware, firmware, software, or in combinations of them. Embodiments may be implemented as a computer program product, i.e., a computer program tangibly embodied in an information carrier, e.g., in a machine-readable storage device or in a propagated signal, for execution by, or to control the operation of, a data processing apparatus, e.g., a programmable processor, a computer, or multiple computers. Embodiments may also be provided on a computer readable medium or computer readable storage medium, which may be a non-transitory medium. Embodiments of the various techniques may also include embodiments provided via transitory signals or media, and / or programs and / or software embodiments that are downloadable via the Internet or other network(s), either wired networks and / or wireless networks. In addition, embodiments may be provided via machine type communications (MTC), and also via an Internet of Things (IOT).

[0176] As used in this application, the term ‘circuitry’ or “circuit” refers to all of the following: (a) hardware-only circuit implementations, such as implementations in only analog and / or digital circuitry, and (b) combinations of circuits and soft-ware (and / orfirmware), such as (as applicable): (i) a combination of processor(s) or (ii) portions of processor(s) / software including digital signal processor(s), software, and memory(ies) that work together to cause an apparatus to perform various functions, and (c) circuits, such as a microprocessor(s) or a portion of a microprocessor(s), that require software or firmware for operation, even if the software or firmware is not physically present. This definition of ‘circuitry’ applies to all uses of this term in this application. As a further example, as used in this application, the term ‘circuitry’ would also cover an implementation of merely a processor (or multiple processors) or a portion of a processor and its (or their) accompanying software and / or firmware. The term ‘circuitry’ would also cover, for example and if applicable to the particular element, a baseband integrated circuit or applications processor integrated circuit for a mobile phone or a similar integrated circuit in a server, a cellular network device, or another network device.

[0177] The computer program may be in source code form, object code form, or in some intermediate form, and it may be stored in some sort of carrier, distribution medium, or computer readable medium, which may be any entity or device capable of carrying the program. Such carriers include a record medium, computer memory, read-only memory, photoelectrical and / or electrical carrier signal, telecommunications signal, and software distribution package, for example. Depending on the processing power needed, the computer program may be executed in a single electronic digital computer, or it may be distributed amongst a number of computers.

[0178] Furthermore, embodiments of the various techniques described herein may use a cyber-physical system (CPS) (a system of collaborating computational elements controlling physical entities). CPS may enable the embodiment and exploitation of massive amounts of interconnected ICT devices (sensors, actuators, processors microcontrollers, ...) embedded in physical objects at different locations. Mobile cyber physical systems, in which the physical system in question has inherent mobility, are a subcategory of cyber-physical systems. Examples of mobile physical systems include mobile robotics and electronics transported by humans or animals. The rise in popularity of smartphones has increased interest in the area of mobile cyber-physical systems. Therefore, various embodiments of techniques described herein may be provided via one or more of these technologies.

[0179] A computer program, such as the computer program(s) described above, can be written in any form of programming language, including compiled or interpreted languages, and can be deployed in any form, including as a standalone program or as a module, component, subroutine, or other unit or part of it suitable for use in a computing environment.A computer program can be deployed to be executed on one computer or on multiple computers at one site or distributed across multiple sites and interconnected by a communication network.

[0180] Method steps may be performed by one or more programmable processors executing a computer program or computer program portions to perform functions by operating on input data and generating output. Method steps also may be performed by, and an apparatus may be implemented as, special purpose logic circuitry, e.g., an FPGA (field programmable gate array) or an ASIC (application specific integrated circuit).

[0181] Processors suitable for the execution of a computer program include, by way of example, both general and special purpose microprocessors, and any one or more processors of any kind of digital computer, chip or chipset. Generally, a processor will receive instructions and data from a read-only memory or a random access memory or both. Elements of a computer may include at least one processor for executing instructions and one or more memory devices for storing instructions and data. Generally, a computer also may include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data, e.g., magnetic, magnetooptical disks, or optical disks. Information carriers suitable for embodying computer program instructions and data include all forms of non-volatile memory, including by way of example semiconductor memory devices, e.g., EPROM, EEPROM, and flash memory devices; magnetic disks, e.g., internal hard disks or removable disks; magneto-optical disks; and CD-ROM and DVD-ROM disks. The processor and the memory may be supplemented by, or incorporated in, special purpose logic circuitry.

[0182] To provide for interaction with a user, embodiments may be implemented on a computer having a display device, e.g., a cathode ray tube (CRT) or liquid crystal display (LCD) monitor, for displaying information to the user and a user interface, such as a keyboard and a pointing device, e.g., a mouse or a trackball, by which the user can provide input to the computer. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback, e.g., visual feedback, auditory feedback, or tactile feedback; and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0183] Embodiments may be implemented in a computing system that includes a backend component, e.g., as a data server, or that includes a middleware component, e.g., an application server, or that includes a frontend component, e.g., a client computer having a graphical user interface or a Web browser through which a user can interact with anembodiment, or any combination of such backend, middleware, or frontend components. Components may be interconnected by any form or medium of digital data communication, e.g., a communication network. Examples of communication networks include a local area network (LAN) and a wide area network (WAN), e.g., the Internet.

[0184] While certain features of the described embodiments have been illustrated as described herein, many modifications, substitutions, changes and equivalents will now occur to those skilled in the art. It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the various embodiments.

Claims

WHAT IS CLAIMED IS:

1. An apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform: receiving from a network node, at least one parameter associated with a wakeup signal; determining, based on the at least one parameter, at least one set of prioritized cells for reception of the wake-up signal; and transmitting to the network node, information of the at least one set of prioritized cells.

2. The apparatus of claim 1, wherein the at least one set of prioritized cells comprises at least one of: a first set of prioritized cells; or a second set of prioritized cells.

3. The apparatus of claim 1 or 2, wherein the at least one set of prioritized cells comprises two or more sets of prioritized cells.

4. The apparatus of any one of claims 1 to 3, wherein the apparatus is further caused to perform receiving the wake-up signal from a cell of the at least one set of prioritized cells.

5. The apparatus of claim 3, wherein the two or more sets of prioritized cells are prioritized based on a priority order, wherein the priority order determines from which set of prioritized cells a cell will be determined for receiving the wake-up signal.

6. The apparatus of claim 5, wherein the wake-up signal from the cell of the at least one set of prioritized cells indicates the priority order.

7. The apparatus of any one of claims 1 to 6, wherein the at least one parameter comprises at least one of: a maximum number of sets of prioritized cells; a maximum number of cells per set of prioritized cells; or a wake-up latency value associated with each cell of the set of prioritized cells.

8. The apparatus of claim 7, wherein a number of cells of the set of prioritized cells is less than or equal to the maximum number of cells per set of prioritized cells.

9. The apparatus of any one of claims 1 to 8, wherein the apparatus is further caused to perform receiving a paging message from a cell of the at least one set of prioritized cells.

10. The apparatus of any one of claims 1 to 9, wherein the apparatus is further caused to perform transmitting an update of the information of the at least one set of prioritized cells based on at least one of: receiving a paging message from a cell of the at least one set of prioritized cells; or establishment of a mobile originated connection.

11. The apparatus of any one of claims 1 to 10, wherein the determining of the at least one set of prioritized cells is based on at least one of: a wake-up latency value associated with each cell of the at least one set of prioritized cells, wherein a set of prioritized cells include one or more cells with equal wake-up latency values; signal quality measurements with respect to a cell of the at least one set of prioritized cells; collected information based on most recent selected cells; a cell reselection procedure; or location information.

12. The apparatus of any one of claims 1 to 11, wherein the apparatus is further caused to perform determining to turn on a main receiver for reception of a paging message until a cell of the at least one set of prioritized cells is selected, wherein the determining is based on selection of a cell excluded from the at least one set of prioritized cells.

13. The apparatus of any one of claims 1 to 12, wherein the apparatus is further caused to perform transmitting to the network node a capability indication of wake-up signal support, and wherein the receiving of the at least one parameter is based on the capability indication.

14. The apparatus of any one of claims 1 to 13, wherein the at least one parameter associated with the wake-up signal is received via a radio resource configuration message.

15. The apparatus of any one of claims 1 to 14, wherein the information of the at least one set of prioritized cells comprises an identifier of a cell associated with the at least one set of prioritized cells.

16. An apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform: transmitting to a user device, at least one parameter associated with a wake-up signal; receiving, from the user device, information of at least one set of prioritized cells; and transmitting the wake-up signal from a cell of the at least one set of prioritized cells.

17. A method comprising: receiving, by a user device from a network node, at least one parameter associated with a wake-up signal; determining, based on the at least one parameter, at least one set of prioritized cells for reception of the wake-up signal; and transmitting to the network node, information of the at least one set of prioritized cells.

18. A method comprising : transmitting, from a network node to a user device, at least one parameter associated with a wake-up signal;receiving, from the user device, information of at least one set of prioritized cells; and transmitting the wake-up signal from a cell of the at least one set of prioritized cells.

19. An apparatus comprising: means for receiving from a network node, at least one parameter associated with a wake-up signal; means for determining, based on the at least one parameter, at least one set of prioritized cells for reception of the wake-up signal; and means for transmitting to the network node, information of the at least one set of prioritized cells.

20. An apparatus comprising: means for transmitting to a user device, at least one parameter associated with a wake-up signal; means for receiving, from the user device, information of at least one set of prioritized cells; and means for transmitting the wake-up signal from a cell of the at least one set of prioritized cells.

21. A computer-readable storage medium comprising program instructions, when executed by an apparatus, cause the apparatus to perform: receiving from a network node, at least one parameter associated with a wakeup signal; determining, based on the at least one parameter, at least one set of prioritized cells for reception of the wake-up signal; and transmitting to the network node, information of the at least one set of prioritized cells.

22. A computer-readable storage medium comprising program instructions, when executed by an apparatus, cause the apparatus to perform: transmitting to a user device, at least one parameter associated with a wake-up signal;receiving, from the user device, information of at least one set of prioritized cells; and transmitting the wake-up signal from a cell of the at least one set of prioritized cells.

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