HK40027716B - Techniques and apparatuses for wakeup signal design and resource allocation - Google Patents

Description

Techniques and apparatus for wake-up signal design and resource allocation

Cross-reference to related applications in accordance with 35 U.S. C119

This patent application claims priority to enjoying the following applications: U.S. provisional patent application Ser. No.62/559,331, entitled "TECHNIQUES AND APPARATUSES FOR WAKEUP SIGNAL DESIGN AND RESOURCE ALLOCATION," filed on day 9 and 15 in 2017; U.S. provisional patent application No.62/673,718 entitled "TECHNIQUES AND APPARATUSES FOR WAKEUP SIGNAL DESIGN AND RESOURCE ALLOCATION," filed on 5.18.2018; and U.S. non-provisional patent application No.16/127,027, entitled "TECHNIQUES AND APPARATUSES FOR WAKEUP SIGNAL DESIGN AND RESOURCE ALLOCATION," filed on 9 and 10 of 2018, which is expressly incorporated herein by reference.

Technical Field

Aspects of the present disclosure relate generally to wireless communications, and more particularly, to techniques and apparatus for wake-up signal design and resource allocation.

Background

Wireless communication systems have been widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcast. A typical wireless communication system may use multiple access techniques capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access techniques include Code Division Multiple Access (CDMA) systems, time Division Multiple Access (TDMA) systems, frequency Division Multiple Access (FDMA) systems, orthogonal Frequency Division Multiple Access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-advanced is an evolving set of Universal Mobile Telecommunications System (UMTS) mobile standards promulgated by the third generation partnership project (3 GPP).

The wireless communication network may include a plurality of Base Stations (BSs), wherein the BSs are capable of supporting communication for a plurality of User Equipments (UEs). The UE may communicate with a Base Station (BS) via a downlink and an uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As described in more detail herein, a BS may refer to a node B, gNB, an Access Point (AP), a radio head, a transmission-reception point (TRP), a 5G BS, a 5G node B, and so on.

The above multiple access techniques have been adopted in a variety of telecommunications standards to provide a universal protocol that enables different wireless communication devices to communicate in a metropolitan, national, regional, and even global area. 5G, which may also be referred to as New Radio (NR), is an evolving set of LTE mobile standards promulgated by the third generation partnership project (3 GPP). The 5G is designed to better support mobile broadband internet access by improving spectral efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) on the Downlink (DL) (CP-OFDM), CP-OFDM and/or SC-FDM on the Uplink (UL) (e.g., which is also known as discrete fourier transform spread OFDM (DFT-s-OFDM), and other open standards supporting beamforming, multiple Input Multiple Output (MIMO) antenna technology, and carrier aggregation, however, as the mobile broadband access needs continue to increase, there is a need to further improve LTE and 5G technology.

The BS may send a signal to the UE to indicate whether the UE should decode a subsequent communication (e.g., downlink channel). This may increase the battery efficiency of the UE because the UE may not monitor for subsequent communications unless the UE receives a signal. For example, this signal may be referred to as a wake-up signal. In some cases, the wake-up signal may be applied to multiple UEs. For example, by assigning UEs to two or more UE groups, a single wake-up signal may be used to wake up all UEs in the UE groups. This may be more efficient than sending a wake-up signal to a single UE, and may be more efficient than waking up all UEs (rather than just a group of UEs) for subsequent communications. It may be beneficial to implement diversity (e.g., frequency diversity, time diversity, and/or space diversity) for wake-up signals destined for different groups of UEs.

Disclosure of Invention

Some techniques and apparatuses described herein provide for resource allocation for achieving frequency diversity, time diversity, and/or space diversity for wake-up signals destined for two or more groups of UEs by transmitting the wake-up signals according to respective resource patterns associated with the two or more groups of UEs. For example, a UE associated with a particular UE group may identify a wake-up signal for the particular UE group based at least in part on which resource pattern is used for the particular UE group, based at least in part on a preamble of the wake-up signal, and so on. Additionally, some techniques and apparatuses described herein provide for resource allocation for achieving spatial diversity for a wake-up signal for a single UE group by transmitting a wake-up signal using two or more antenna ports according to respective resource patterns associated with the two or more antenna ports. In this way, the UE group wake-up signaling is provided using the corresponding resource pattern, which improves diversity and allows wake-up signaling for the UE group, thereby saving network resources that would otherwise be used for wake-up signals for multiple individual UEs.

Furthermore, some techniques and apparatuses described herein provide for configuration for wake-up signals. For example, some techniques and apparatuses described herein provide for transmitting a wake-up signal after a configured delay, which may be based at least in part on the capabilities of the UE. As yet another example, some techniques and apparatuses described herein provide for resource allocation for a wake-up signal in connection with repeated communications such that UEs that cannot decode the repeated communications are not woken up. In this way, the configuration of the wake-up signal is improved, the efficiency of the UE and the UE group is improved with respect to the wake-up signaling, and the diversity of the wake-up signaling is improved.

In one aspect of the disclosure, a method performed by a base station, a method performed by a user equipment, an apparatus, a base station, a user equipment, and a computer program product are provided.

In some aspects, a method performed by a base station may include: transmitting a wake-up signal using a resource selected from one of one or more first resources of a first resource pattern or one or more second resources of a second resource pattern, wherein a resource is selected from the one or more first resources or the one or more second resources based at least in part on whether the wake-up signal is for a User Equipment (UE) associated with a first UE group or a second UE group; and/or transmitting a communication to the UE based at least in part on the wake-up signal.

In some aspects, the base station may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: transmitting a wake-up signal using a resource selected from one of one or more first resources of a first resource pattern or one or more second resources of a second resource pattern, wherein a resource is selected from the one or more first resources or the one or more second resources based at least in part on whether the wake-up signal is for a UE associated with a first group of UEs or a second group of UEs; and/or transmitting a communication to the UE based at least in part on the wake-up signal.

In some aspects, the apparatus may include: means for transmitting a wake-up signal using a resource selected from one of one or more first resources of a first resource pattern or one or more second resources of a second resource pattern, wherein a resource is selected from the one or more first resources or the one or more second resources based at least in part on whether the wake-up signal is for a UE associated with a first group of UEs or a second group of UEs; and/or means for transmitting the communication to the UE based at least in part on the wake-up signal.

In some aspects, the computer program product may include a non-transitory computer-readable medium storing one or more instructions for wireless communication that, when executed by one or more processors, cause the one or more processors to: transmitting a wake-up signal using a resource selected from one of one or more first resources of a first resource pattern or one or more second resources of a second resource pattern, wherein a resource is selected from the one or more first resources or the one or more second resources based at least in part on whether the wake-up signal is for a UE associated with a first group of UEs or a second group of UEs; and transmitting a communication to the UE based at least in part on the wake-up signal.

In some aspects, a method performed by a user device may include: monitoring a particular resource of a resource pattern for wake-up signaling associated with a UE group including the UE, wherein the resource pattern is associated with the UE group; and receiving a wake-up signal, wherein the wake-up signal corresponds to at least one of a cell identifier or a UE group identifier associated with the UE, wherein the wake-up signal indicates at least a portion of the cell identifier or a portion of the UE group identifier.

In some aspects, the user device may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: monitoring a particular resource of a resource pattern for wake-up signaling associated with a UE group including the UE, wherein the resource pattern is associated with the UE group; and receiving a wake-up signal, wherein the wake-up signal corresponds to at least one of a cell identifier or a UE group identifier associated with the UE, wherein the wake-up signal indicates at least a portion of the cell identifier or a portion of the UE group identifier.

In some aspects, the apparatus may include means for: monitoring a particular resource of a resource pattern for wake-up signaling associated with a group of UEs including the apparatus, wherein the resource pattern is associated with the group of UEs; and receiving a wake-up signal, wherein the wake-up signal corresponds to at least one of a cell identifier or a UE group identifier associated with the apparatus, wherein the wake-up signal indicates at least a portion of the cell identifier or a portion of the UE group identifier.

In some aspects, the computer program product may include a non-transitory computer-readable medium storing one or more instructions for wireless communication that, when executed by one or more processors, cause the one or more processors to: monitoring a particular resource of a resource pattern for wake-up signaling associated with a UE group including the UE, wherein the resource pattern is associated with the UE group; and receiving a wake-up signal, wherein the wake-up signal corresponds to at least one of a cell identifier or a UE group identifier associated with the UE, wherein the wake-up signal indicates at least a portion of the cell identifier or a portion of the UE group identifier.

In some aspects, a method performed by a base station may include: determining a configuration for a wake-up signal associated with a User Equipment (UE); transmitting a wake-up signal in a resource based at least in part on the configuration; and transmitting a communication to the UE based at least in part on the wake-up signal.

In some aspects, the base station may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: determining a configuration for a wake-up signal associated with a User Equipment (UE); transmitting a wake-up signal in a resource based at least in part on the configuration; transmitting a communication to a UE based at least in part on a wake-up signal

In some aspects, the apparatus may include: determining a configuration for a wake-up signal associated with a User Equipment (UE); means for transmitting a wake-up signal in a resource based at least in part on the configuration; the apparatus may include means for transmitting a communication to a UE based at least in part on a wake-up signal.

In some aspects, the computer program product may include a non-transitory computer-readable medium storing one or more instructions for wireless communication that, when executed by one or more processors, cause the one or more processors to: determining a configuration for a wake-up signal associated with a User Equipment (UE); transmitting a wake-up signal in a resource based at least in part on the configuration; the communication is sent to the UE based at least in part on the wake-up signal.

In some aspects, a method performed by a User Equipment (UE) may include: monitoring wake-up signaling in a resource based at least in part on a wake-up signal configuration, wherein the wake-up signal configuration is based at least in part on a capability of the UE; receiving a wake-up signal in the resource; the communication is received based at least in part on the wake-up signal.

In some aspects, the UE may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: monitoring wake-up signaling in a resource based at least in part on a wake-up signal configuration, wherein the wake-up signal configuration is based at least in part on a capability of the UE; receiving a wake-up signal in the resource; the communication is received based at least in part on the wake-up signal.

In some aspects, the apparatus may include: means for monitoring wake-up signaling in a resource based at least in part on a wake-up signal configuration, wherein the wake-up signal configuration is based at least in part on a capability of the apparatus; means for receiving a wake-up signal in the resource; the apparatus may include means for receiving a communication based at least in part on a wake-up signal.

In some aspects, the computer program product may include a non-transitory computer-readable medium storing one or more instructions for wireless communication that, when executed by one or more processors, cause the one or more processors to: monitoring wake-up signaling in a resource based at least in part on a wake-up signal configuration, wherein the wake-up signal configuration is based at least in part on a capability of the UE; receiving a wake-up signal in the resource; the communication is received based at least in part on the wake-up signal.

Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer readable media, base stations, user equipment, wireless communication devices, and processing systems, as substantially described herein with reference to and as illustrated in the accompanying drawings and description.

The foregoing has outlined rather broadly the features and technical advantages of examples in accordance with the present disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described below. The concepts and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The features of the concepts disclosed herein (as to their organization and method of operation), together with the associated advantages, will be better understood from the following detailed description when considered in connection with the accompanying drawings. Each of these figures is provided for illustration and description purposes only and is not intended as a definition of the limits of the claims.

Drawings

Fig. 1 is a diagram showing an example of a wireless communication network.

Fig. 2 is a diagram illustrating an example in which a base station communicates with a UE in a wireless communication network.

Fig. 3A-3C are diagrams illustrating examples of Time Division Multiplexing (TDM) and/or antenna port patterns for wake-up signal transmission.

Fig. 4 is a diagram showing an example of a Frequency Division Multiplexing (FDM) mode for wake-up signal transmission.

Fig. 5 is a flow chart of a method of wireless communication.

Fig. 6 is a flow chart of a method of wireless communication.

Fig. 7 is a conceptual data flow diagram illustrating the data flow between different modules/means/components in an exemplary apparatus.

Fig. 8 is a diagram showing an example of a hardware implementation for an apparatus using a processing system.

Fig. 9 is a conceptual data flow diagram illustrating the data flow between different modules/means/components in an exemplary apparatus.

Fig. 10 is a diagram showing an example of a hardware implementation for an apparatus using a processing system.

Fig. 11 is a diagram illustrating an example of a wake-up signal configuration based at least in part on UE capabilities.

Fig. 12 is a flow chart of a method of wireless communication.

Fig. 13 is a flow chart of a method of wireless communication.

Fig. 14 is a conceptual data flow diagram illustrating the data flow between different modules/means/components in an exemplary apparatus.

Fig. 15 is a diagram showing an example of a hardware implementation for an apparatus using a processing system.

Fig. 16 is a conceptual data flow diagram illustrating the data flow between different modules/means/components of an exemplary apparatus.

Fig. 17 is a diagram showing an example of a hardware implementation for an apparatus using a processing system.

Detailed Description

The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations only and is not intended to represent the configurations in which the concepts described herein may be implemented. The detailed description includes specific details for the purpose of providing a thorough understanding of the various concepts. It will be apparent, however, to one skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid obscuring such concepts.

Aspects of a telecommunications system are now presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and be depicted in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (which are collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

For example, an element or any portion of an element or any combination of elements may be implemented using a "processing system" that includes one or more processors. Examples of processors include microprocessors, microcontrollers, digital Signal Processors (DSPs), field Programmable Gate Arrays (FPGAs), programmable Logic Devices (PLDs), state machines, gate logic, discrete hardware circuits, and other suitable hardware configured to perform the various functions described throughout this disclosure. One or more processors in the processing system may execute the software. Software should be construed broadly to mean instructions, instruction sets, code segments, program code, programs, subroutines, software modules, applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like, whether referred to as software, firmware, middleware, microcode, hardware description language, or other terminology.

Thus, in one or more exemplary embodiments, the functions described herein may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, these functions may be stored or encoded as one or more instructions or code on a computer-readable medium. Computer readable media includes computer storage media. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise Random Access Memory (RAM), read-only memory (ROM), electronically Erasable Programmable ROM (EEPROM), compact disk ROM (CD-ROM) or other optical disk storage, magnetic disk storage or other magnetic storage devices, combinations of the foregoing types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of instructions or data structures and that can be accessed by a computer.

It should be noted that while aspects herein are described using terms commonly associated with 3G and/or 4G wireless technologies, aspects of the present disclosure may also be applied to other generation-based communication systems including 5G technologies (e.g., 5G and beyond).

Fig. 1 is a diagram illustrating a network 100 in which aspects of the present disclosure may be implemented. The network 100 may be an LTE network or some other wireless network (e.g., a 5G network). Wireless network 100 may include a plurality of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110 d) and other network entities. A BS is an entity that communicates with User Equipment (UE) and may also be referred to as a base station, 5G BS, node B, gNB, 5G NB, access point, transmission-reception point (TRP), and so forth. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" can refer to a coverage area of a BS and/or a BS subsystem serving the coverage area, depending on the context in which the term is used.

The BS may provide communication coverage for a macrocell, a picocell, a femtocell, and/or another type of cell. A macrocell can cover a relatively large geographic area (e.g., a few kilometers in radius) and can allow unrestricted access by UEs with service subscription. The pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access to UEs (e.g., UEs in a Closed Subscriber Group (CSG)) that have an association with the femto cell. The BS for the macro cell may be referred to as a macro BS. The BS for the pico cell may be referred to as a pico BS. The BS for the femto cell may be referred to as a femto BS or a home BS. In the example shown in fig. 1, BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102 c. The BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "5G BS", "gNB", "TRP", "AP", "node B", "5G NB" and "cell" may be used interchangeably herein.

In some examples, the cells need not be stationary, and the geographic area of the cells may be moved according to the location of the mobile BS. In some examples, BSs may be interconnected to each other and/or to one or more other BSs or network nodes (not shown) in access network 100 through various types of backhaul interfaces (e.g., direct physical connections, virtual networks, etc.) using any suitable transport network.

The wireless network 100 may also include relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., BS or UE) and send the transmission of data to a downstream station (e.g., UE or BS). The relay station may also be a UE that may relay transmissions of other UEs. In the example shown in fig. 1, relay station 110d may communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120 d. In addition, the relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BS, pico BS, femto BS, relay BS, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, femto BS, and relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

The network controller 130 may be coupled to a set of BSs and provide coordination and control for the BSs. The network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with each other, for example, directly or indirectly via a wireless or wired backhaul.

UEs 120 (e.g., 120a, 120b, 120 c) may be dispersed throughout wireless network 100, each of which may be stationary or mobile. A UE may also be called an access terminal, mobile station, subscriber unit, station, etc. The UE may be a cellular telephone (e.g., a smart phone), a Personal Digital Assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a Wireless Local Loop (WLL) station, a tablet device, a camera, a gaming device, a netbook, a smartbook, a super book, a medical device or equipment, a biosensor/device, a wearable device (e.g., a smartwatch, smart garment, smart glasses, a smartwristband, smart jewelry (e.g., a smartring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), an on-board component or sensor, a smart meter/sensor, an industrial manufacturing device, a global positioning system device, or any other suitable device configured to communicate via a wireless medium or wired medium.

Some UEs may be considered Machine Type Communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. For example, MTC and eMTC UEs include robots, drones, remote devices, such as sensors, meters, monitors, location tags, and the like, that may communicate with a base station, another device (e.g., a remote device), or some other entity. For example, a wireless node may provide a connection to or to a network (e.g., a wide area network such as the internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered internet of things (IoT) devices and/or may be implemented as NB-IoT (narrowband internet of things) devices. Some UEs may be considered Customer Premises Equipment (CPE). A UE 120, such as NB-IoT or eMTC UE 120, may remain in a dormant or idle state until a wake-up signal is received. The wake-up signal may indicate that the communication is scheduled for UE 120. In some aspects described elsewhere herein, UEs 120 may be combined into some UE groups, which may improve the efficiency of use of the wake-up signal.

In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a particular RAT and may operate on one or more frequencies. RATs may also be referred to as radio technologies, air interfaces, etc. Frequencies may also be referred to as carriers, frequency channels, etc. Each frequency may support a single RAT in a given geographical area in order to avoid interference between wireless networks of different RATs. In some cases, a 5G RAT network may be deployed.

In some examples, access to the air interface may be scheduled, wherein a scheduling entity (e.g., a base station, etc.) allocates resources for communications between some or all devices and equipment within a service area or cell of the scheduling entity. In the present disclosure, as discussed further below, a scheduling entity may be responsible for scheduling, allocating, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communications, the subordinate entity utilizes the resources allocated by the scheduling entity.

The base station is not just the only entity acting as a scheduling entity. That is, in some examples, a UE may act as a scheduling entity scheduling resources for one or more subordinate entities (e.g., one or more other UEs). In this example, the UE acts as a scheduling entity and other UEs communicate wirelessly using the resources scheduled by the UE. The UE may act as a scheduling entity in a peer-to-peer (P2P) network and/or a mesh network. In the mesh network example, the UEs may optionally communicate directly with each other in addition to communicating with the scheduling entity.

Thus, in a wireless communication network that utilizes scheduled access time-frequency resources and has a cellular configuration, a P2P configuration, and a mesh configuration, a scheduling entity and one or more subordinate entities may communicate utilizing the scheduled resources.

As indicated above, fig. 1 is provided as an example only. Other examples are also possible and may differ from that described with reference to fig. 1.

Fig. 2 shows a block diagram 200 of a design of BS 110 and UE 120, which BS 110 and UE 120 may be one of the base stations in fig. 1 and one of the UEs in fig. 1. BS 110 may be equipped with T antennas 234a through 234T and UE 120 may be equipped with R antennas 252a through 252R, where typically T is 1 and R is 1.

At BS 110, transmit processor 220 may receive data for one or more UEs from data source 212, select one or more Modulation and Coding Schemes (MCSs) for each UE based at least in part on a Channel Quality Indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the selected MCS for the UE, and provide data symbols for all UEs. In addition, transmit processor 220 may also process system information (e.g., for semi-Static Resource Partitioning Information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS), narrowband Reference Signals (NRS)) and synchronization signals (e.g., primary Synchronization Signals (PSS) and Secondary Synchronization Signals (SSS), narrowband PSS (NPSS), and narrowband SSS (NSSS)). A Transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if any, and provide T output symbol streams to T Modulators (MODs) 232a through 232T. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 232a through 232T may be transmitted via T antennas 234a through 234T, respectively. According to certain aspects described in further detail below, position encoding may be utilized to generate synchronization signals to convey additional information.

At UE120, antennas 252a through 252r may receive the downlink signals from BS 110 and/or other base stations and provide the received signals to demodulators (DEMODs) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254R, perform MIMO detection on the received symbols (if any), and provide detected symbols. A Receive (RX) processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280. The channel processor may determine a Reference Signal Received Power (RSRP), a Received Signal Strength Indicator (RSSI), a Reference Signal Received Quality (RSRQ), a Channel Quality Index (CQI), and so on. In some aspects, the channel processor may determine the reference value based at least in part on the wake-up signal, as described elsewhere herein.

On the uplink, at UE 120, transmit processor 264 may receive data from data source 262, receive control information from controller/processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.), and process the data and control information. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted back to BS 110. At BS 110, uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 (if any), and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120. The receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to a controller/processor 240. BS 110 may include a communication unit 244 and communicate to network controller 130 via communication unit 244. The network controller 130 may include a communication unit 294, a controller/processor 290, and a memory 292.

Controller/processor 240 of BS 110, controller/processor 280 of UE 120, and/or any other components in fig. 2 may perform signaling related to the wake-up signal resource allocation. For example, controller/processor 240 of BS 110, controller/processor 280 of UE 120, and/or any other component in fig. 2 may perform or direct operations such as method 500 of fig. 5, method 600 of fig. 6, method 1200 of fig. 12, method 1300 of fig. 13, and/or other processes as described herein. Memories 242 and 282 may store data and program codes for BS 110 and UE 120, respectively. The scheduler 246 may schedule UEs for data transmission on the downlink and/or uplink.

As indicated above, fig. 2 is provided as an example only. Other examples are also possible and may differ from that described with reference to fig. 2.

UE group wake-up signal resource allocation

Fig. 3A-3C are diagrams illustrating an example 300 of TDM and/or antenna port patterns for wake-up signal transmission. In fig. 3A-3C, two UE groups are depicted, and each UE group is associated with a respective resource pattern. The resources belonging to the first resource pattern are shown as WUS1 (representing wake-up signal 1) and the resources belonging to the second resource pattern are shown as WUS2 (representing wake-up signal 2). In some aspects, the resource pattern may correspond to a single UE group. Additionally or alternatively, the resource pattern may correspond to an antenna port for transmitting a wake-up signal, as described in further detail below. Further, in fig. 3A-3C, subframe (SF) 0 is used for the physical broadcast channel, SF 4 is used for the system information block (e.g., SIB 1), SF 5 is used for the primary synchronization signal (NPSS), and SF 9 is used for the secondary synchronization signal (NSSS), although other configurations are also possible. In some aspects, the wake-up signal resource may be associated with multiple resource modes (e.g., three resource modes, five resource modes, or any number of resource modes).

As shown by reference numeral 305-1, fig. 3A illustrates a first example of a TDM mode and/or antenna port transmission resource mode. In a first example, resources of a first resource pattern alternate with resources of a second resource pattern. For example, WUS1 may be transmitted on Subframes (SF) 1, 3, and 7, while WUS2 may be transmitted on subframes 2, 6, and 8. In this way, time diversity of wake-up signals for the first UE group and the second UE group is achieved. In some aspects, WUS1 and/or WUS2 may be transmitted (e.g., within at least a single subframe) using the same antenna ports as NPSS, NSSS, and/or reference signals (e.g., NRSs, etc.), which reduces delays associated with retuning the receiver of UE 120.

Additionally or alternatively, WUS1 may be transmitted using a first antenna port of BS 110 and WUS2 may be transmitted using a second antenna port of BS 110. In this case WUS1 and WUS2 may be associated with the same UE group, and the designation of resources as WUS1 or WUS2 may indicate which antenna port will be used to transmit the wake-up signal in the corresponding resource. Thus, spatial diversity of wake-up signals for the first UE group and the second UE group is achieved.

As shown in fig. 3B, the second resource pattern 305-2 may transmit WUS1 during subframes 1, 2, and 3, and WUS2 during subframes 6, 7, and 8. This may provide a greater number of simultaneous repetitions of the wake-up signal, which may increase the likelihood that UE 120 successfully receives the wake-up signal, where multiple repetitions of the wake-up signal are required by UE 120. Additionally or alternatively, BS 110 may transmit WUS1 using a first antenna port in subframes 1, 2, and 3, and WUS2 using a second antenna port in subframes 6, 7, and 8. In this case WUS1 and WUS2 may be associated with the same UE group.

As shown in fig. 3C, the third resource pattern 305-3 may transmit WUS1 in a first frame 310 (e.g., subframes 1, 2, 3, 6, 7, and 8 of the first frame 310) and WUS2 in a second frame 315 (e.g., subframes 1, 2, 3, 6, 7, and 8 of the second frame 315). For example, the first frame 310 and the second frame 315 may be consecutive frames. This may further increase the likelihood of receiving a wake-up signal with a multiple repetition UE.

In some aspects, the plurality of wake-up signals of the resource pattern may be configurable. For example, BS 110 may specify any number of wake-up signals to be included in the resource patterns of WUS1 and/or WUS2. In this way, the versatility of the wake-up signaling is improved and resources can be allocated more efficiently.

In some aspects, for a single wake-up signal (e.g., a single WUS1 or a single WUS 2), two or more different antenna ports may be used within a single subframe. For example, a first subset of symbols of a single wake-up signal may be transmitted from a first antenna port, and a second subset of symbols of a single wake-up signal may be transmitted from a second antenna port, thereby improving spatial diversity.

In some aspects, UE 120 may scan or monitor for a wake-up signal. "scanning" and "monitoring" herein may be used interchangeably. UE 120 may identify or receive the wake-up signal based at least in part on the preamble of the wake-up signal. For example, BS 110 may encode a preamble to identify at least a portion of a cell identifier of a camping cell or a serving cell associated with UE 120. In addition, BS 110 may encode a preamble to identify at least a portion of a UE group identifier that identifies the UE group of UE 120. In some aspects, the UE 120 may determine that the wake-up signal is associated with the UE 120 when the cell identifier and the UE group identifier match the cell identifier and the UE group identifier of the UE 120, respectively. In some aspects, when the cell identifier matches the cell identifier of UE 120, UE 120 may determine that the wake-up signal is associated with UE 120. In some aspects, the UE 120 may determine that the wake-up signal is associated with the UE 120 when the UE group identifier matches the UE group identifier of the UE 120.

In some aspects, BS 110 may select resources for transmission of the wake-up signal based at least in part on a UE group identifier and/or paging narrowband of UE 120. For example, BS 110 may determine the resource using equations 1 to 4 below:

equation 1: SFN mod t= (tdiv N) × (ue_id mod N)

Equation 2: i_s=floor (ue_id/N) mod Ns

Equation 3: pnb=floor (ue_id/(n×ns)) mod Nn

Equation 4: ue_group_id=floor (ue_id/(n×ns)) mod n_wus_groups

Equation 1 is used to identify a paging frame (e.g., a System Frame Number (SFN) mod T) for UE 120, where T refers to a Discontinuous Reception (DRX) cycle, N is a minimum value of T and an nB value configured in SIB2, and ue_id is a UE identifier of UE 120. Equation 2 identifies a Paging Occasion (PO) for UE 120 based at least in part on the ue_id, N, and Ns. Ns is the maximum of 1 and nB.

Equation 3 identifies a Paging Narrowband (PNB) for UE 120 based at least in part on ue_id, N, ns, and Nn, where Nn identifies the number of available narrowband. Equation 4 identifies a UE Group identifier (ue_group_id) for UE 120 based at least in part on the paging narrowband, where n_wus_groups identifies the total number of UE Groups. In this manner, BS 110 and/or UE 120 may determine a UE group for UE 120 based at least in part on the paging narrowband for UE 120.

In some aspects, BS 110 may provide UE 120 with information indicating parameters of the preamble, and UE 120 may identify or receive the associated wake-up signal based at least in part on these parameters. In this case, the configuration of UE 120 may be transparent. For example, UE 120 may not know the particular UE group identifier and/or cell identifier included in the preamble, and may therefore search for any preamble that matches the parameters.

As indicated above, fig. 3A-3C are provided as examples only. Other examples are also possible and may differ from the examples described with reference to fig. 3A-3C.

Fig. 4 is a diagram illustrating an example 400 of an FDM mode for wake-up signal transmission. In some aspects, FDM may be used, for example, with enhanced machine type communication (eMTC) radio access technology. For example, as shown in fig. 4, a set of resources 405, 410, 415, 420 for eMTC communication may include six Physical Resource Blocks (PRBs) in parallel in frequency. For example, the six PRBs may be associated with a single subframe or frame.

As indicated by reference numeral 405, in some aspects, the resources of the resource pattern shown in WUS1 may alternate with the resources of the resource pattern shown in WUS 2. This may improve the frequency diversity of the wake-up signal.

As indicated by reference numeral 410, in some aspects, the plurality of resources of the resource pattern shown in WUS1 may be allocated continuously in frequency and the plurality of resources of the resource pattern shown in WUS2 may be allocated continuously in frequency. In this way, a UE using multiple repetitions may be able to decode the wake-up signal.

As shown by reference numerals 415 and 420, in some aspects WUS1 may be allocated the full bandwidth of a first frame or subframe and WUS2 may be allocated the full bandwidth of a second frame or subframe. In this way, the likelihood of the UE decoding the wake-up signal that requires multiple repetitions may be further improved.

In some aspects, a frequency hopping technique may be used to allocate resources for the wake-up signal. For example, BS 110 may configure UE 120 with a starting subframe index, frequency offset, and/or hopping time for hopping. BS 110 may allocate resources for transmitting the wake-up signal according to the starting subframe index, the frequency offset, and/or the hopping time.

As indicated above, fig. 4 is provided as an example only. Other examples are also possible and may differ from that described with reference to fig. 4.

Fig. 5 is a flow chart of a method 500 of wireless communication. The method may be performed by a base station (e.g., BS 110, apparatus 702/702' of fig. 1, etc.).

At 510, the base station may generate a wake-up signal (e.g., using controller/processor 240, transmit processor 220, TX MIMO processor 230, modulator 232, antenna 234, etc.) for transmission to the UE. For example, the wake-up signal may include a preamble for identifying a UE group of UEs and/or a cell identifier of a cell of the UE. The base station may provide a wake-up signal to wake-up the UE or exit an idle or sleep mode to receive communications.

At 520, the base station (e.g., using controller/processor 240, transmit processor 220, tx MIMO processor 230, modulator 232, antenna 234, etc.) may transmit the wake-up signal using a resource selected from one or more first resources of the first resource pattern or one or more second resources of the second resource pattern. For example, a first resource pattern may be associated with a first UE group and a second resource pattern may be associated with a second UE group. The base station may select a resource of the one or more first resources or the one or more second resources based at least in part on whether to send a wake-up signal to the first UE group or the second UE group.

In some aspects, the one or more first resources alternate with the one or more second resources in the time domain. In some aspects, the one or more first resources are in a first set of subframes and the one or more second resources are in a second set of subframes. In some aspects, a first resource pattern is associated with a first antenna port and a second resource pattern is associated with a second antenna port. In some aspects, the wake-up signal is transmitted using the same antenna port as the synchronization signal or reference signal for the UE. In some aspects, the wake-up signal is transmitted using a different antenna port than the synchronization signal or reference signal for the UE.

In some aspects, the wake-up signal is transmitted using two or more antenna ports within a single subframe. In some aspects, the wake-up signal is transmitted using the same antenna port within at least a single subframe. In some aspects, the number of the one or more first resources or the number of the one or more second resources is configurable or predefined. In some aspects, the one or more first resources and the one or more second resources comprise Physical Resource Blocks (PRBs). In some aspects, the one or more first resources alternate with the one or more second resources in the frequency domain. In some aspects, the resources of the one or more first resources or the one or more second resources vary in the time and frequency domains.

In some aspects, the preamble of the wake-up signal identifies a UE group of the first UE group and the second UE group with which the wake-up signal is associated. In some aspects, the preamble of the wake-up signal identifies the cell with which the UE is associated.

In some aspects, configuration information identifying the first UE group and the second UE group is provided in system information. In some aspects, the transmit power of the wake-up signal is configured based at least in part on a power offset relative to a downlink reference signal transmitted by the base station. In some aspects, the UE is assigned a UE group of the first UE group and the second UE group based at least in part on a paging narrowband of the UE.

In some aspects, the wake-up signal is further identified based at least in part on a parameter of a preamble of the wake-up signal, wherein the UE is configured to detect the parameter of the preamble.

At 530, the base station (e.g., using controller/processor 240, transmit processor 220, TX MIMO processor 230, modulator 232, antenna 234, etc.) may transmit the communication to the UE based at least in part on the wake-up signal. For example, the communication may include a downlink channel. After sending the wake-up signal to the UE, the base station may send a communication to the UE such that the UE monitors the communication (e.g., wakes up from idle mode, etc.).

While fig. 5 illustrates exemplary blocks of a method of wireless communication, in some aspects the method may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than shown in fig. 5. Additionally or alternatively, two or more of the blocks shown in fig. 5 may be performed in parallel.

Fig. 6 is a flow chart of a method 600 of wireless communication. The method may be performed by a UE (e.g., UE 120, apparatus 902/902' of fig. 1, etc.).

At 610, the UE (e.g., using antennas 252, demodulator 254, MIMO detector 256, receive processor 258, controller/processor 280, etc.) may monitor particular resources for a resource pattern for wake-up signaling associated with the group of UEs that includes the UE. For example, the resource pattern may be associated with a group of UEs. The UE may monitor specific resources for wake-up signaling for the group of UEs. When the UEs of the UE group receive the wake-up signal, the UEs of the UE group may perform wake-up and/or receive subsequent communications. As used herein, waking up or performing waking up may refer to monitoring or beginning to monitor for pages at paging occasions. For example, when waking up or performing waking up, the UE may monitor or begin monitoring control channels (e.g., PDCCHs such as MTC PDCCHs or narrowband PDCCHs, etc.), data channels (e.g., PDSCH such as MTC PDSCH or narrowband PDSCH, etc.), and/or different types of paging. In some aspects, a UE receives configuration information in system information indicating that the UE is associated with a group of UEs.

In some aspects, a UE group is assigned to a UE based at least in part on a paging narrowband of the UE. In some aspects, the length of the particular resource is based at least in part on a maximum number of repetitions associated with communications to be received by the UE.

At 620, the UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receive processor 258, controller/processor 280, etc.) may receive a wake-up signal, where the wake-up signal corresponds to at least one of a cell identifier or a UE group identifier associated with the UE. For example, a wake-up signal (e.g., a preamble of the wake-up signal) may indicate at least a portion of a cell identifier and/or at least a portion of a UE group identifier. The UE may receive a wake-up signal based at least in part on the preamble. In some aspects, a portion of the UE group identifier is indicated by a preamble of the wake-up signal. In some aspects, the wake-up signal is further received based at least in part on a parameter of a preamble of the wake-up signal, wherein the UE is configured to detect the parameter of the preamble.

At 630, the UE (e.g., using controller/processor 280, etc.) may optionally determine a reference value based at least in part on the transmit power of the wake-up signal. For example, the transmission power may be based at least in part on a power offset relative to a downlink reference signal received by the UE. In this way, the UE may save network resources that would otherwise be used to transmit and/or use separate synchronization signals to determine the reference value.

At 640, the UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receive processor 258, controller/processor 280, etc.) may optionally perform a wake-up to receive communications based at least in part on the receive wake-up signal. For example, the UE may wake up at a particular time to receive a page based at least in part on receiving the wake-up signal. In some aspects, the UE may remain awake for a particular length of time after receiving the wake-up signal, as described in further detail elsewhere herein.

At 650, the UE (e.g., using antennas 252, demodulators 254, MIMO detector 256, receive processor 258, controller/processor 280, etc.) may optionally receive the communications. For example, the UE may receive a communication after performing a wake-up. In some aspects, the communication is received after a delay, wherein the delay is based at least in part on the capability of the UE.

While fig. 6 illustrates exemplary blocks of a method of wireless communication, in some aspects the method may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than shown in fig. 6. Additionally or alternatively, two or more of the blocks shown in fig. 6 may be performed in parallel.

Fig. 7 is a conceptual data flow diagram 700 illustrating the data flow between different modules/means/components in an exemplary apparatus 702. The apparatus 702 may be a base station such as an eNB, a gNB, or the like. In some aspects, the apparatus 702 includes a receiving module 704 and a transmitting module 706.

The receiving module 704 may receive a signal 708 from a UE 750 (e.g., UE 120, etc.). In some aspects, the signal 708 may identify the capabilities of the UE 750. The receiving module may provide the data 710 to the transmitting module 706. The data 710 may identify the capability.

The transmitting module 706 may transmit a wake-up signal and/or communication based at least in part on the wake-up signal. For example, transmit module 706 may generate signal 712, and apparatus 702 may transmit signal 712 to UE 750. The signal 712 may include a wake-up signal, the communication, and/or other information.

The apparatus may include additional modules for performing each of the blocks in the algorithm in the foregoing flow chart of fig. 5. Thus, each block in the foregoing flow chart of fig. 5 may be performed by a module, and the apparatus may include one or more of these modules. These modules may be one or more hardware components specifically configured to perform the stated processes/algorithms, implemented by a processor configured to perform the stated processes/algorithms, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

The number and arrangement of modules shown in fig. 7 are provided as examples only. In implementation, there may be additional modules, fewer modules, different modules, or differently arranged modules than shown in fig. 7. Furthermore, two or more modules shown in fig. 7 may be implemented in a single module, or a single module shown in fig. 7 may be implemented as a plurality of distributed modules. Additionally or alternatively, a set of modules (e.g., one or more modules) shown in fig. 7 may perform one or more functions described as being performed by another set of modules shown in fig. 7.

Fig. 8 is a diagram 800 illustrating an example of a hardware implementation for an apparatus 702' using a processing system 802. The apparatus 702' may be a base station such as an eNB, a gNB, or the like.

The processing system 802 may be implemented using a bus architecture, represented generally by the bus 804. The bus 804 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 802 and the overall design constraints. The bus 804 links together various circuits including one or more processors and/or hardware modules, represented by the processor 806, the modules 704, 706, and the computer-readable medium/memory 808. In addition, bus 804 may link various other circuits such as clock sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.

The processing system 802 may be coupled to a transceiver 810. The transceiver 810 is coupled to one or more antennas 812. The transceiver 810 provides a means for communicating with various other apparatus over a transmission medium. Transceiver 810 receives signals from the one or more antennas 812, extracts information from the received signals, and provides the extracted information to processing system 802 (specifically, receiving module 704). In addition, transceiver 810 also receives information from processing system 802 (specifically, transmission module 706) and generates signals to be applied to the one or more antennas 812 based at least in part on the received information. The processing system 802 includes a processor 806 coupled to a computer-readable medium/memory 808. The processor 806 is responsible for general processing, including the execution of software stored on the computer-readable medium/memory 808. The software, when executed by the processor 806, causes the processing system 802 to perform the various functions described supra for any particular apparatus. The computer-readable medium/memory 808 may also be used for storing data that is manipulated by the processor 806 when executing software. In addition, the processing system includes at least one of modules 704 and 706. These modules may be software modules running in the processor 806, resident/stored in the computer readable medium/memory 808, one or more hardware modules coupled to the processor 806, or some combination thereof. Processing system 802 can be a component of BS 110 that can include memory 242 and/or at least one of TX MIMO processor 230, receive processor 238, and/or controller/processor 240.

In some aspects, an apparatus 702/702' for wireless communication comprises: a means for transmitting a wake-up signal, a means for transmitting a communication based at least in part on the wake-up signal, and the like. The foregoing elements may be one or more of the foregoing modules of apparatus 702 and/or processing system 802 of apparatus 702' configured to perform the functions described by these foregoing elements. As described above, the processing system 802 can include the TX MIMO processor 230, the receive processor 238, and/or the controller/processor 240. Thus, in one configuration, the aforementioned means may be the TX MIMO processor 230, the receive processor 238, and/or the controller/processor 240 configured to perform the functions recited by the aforementioned means.

Fig. 8 is provided as an example. Other examples are possible and may differ from that described in connection with fig. 8.

Fig. 9 is a conceptual data flow diagram 900 illustrating the data flow between different modules/means/components in an exemplary apparatus 902. The apparatus 902 may be a UE. In some aspects, the apparatus 902 includes a receiving module 904, a monitoring module 906, an identifying module 908, a determining module 910, and/or a transmitting module 912.

The receiving module 904 may receive the signal 914 from the BS 950. In some aspects, the signal 914 may include a wake-up signal and/or a communication associated with the wake-up signal. The receiving module 904 may process the signal 914 and may provide data 916 to the monitoring module 906 and/or the determining module 910 based at least in part on the signal 914.

The monitoring module 906 may monitor particular resources for a resource pattern of wake-up signaling associated with the UE group, wherein the resource pattern is associated with the UE group, and may provide the data 918 to the identification module 908 based at least in part on the monitoring. The identification module 908 may identify or receive a wake-up signal using data 918 associated with at least one of a cell identifier or a UE group identifier, wherein the wake-up signal indicates at least a portion of the cell identifier or a portion of the UE group identifier. In some aspects, the receiving module 904 may receive and/or identify a wake-up signal.

The determination module 910 can determine the reference value based at least in part on a transmission power of the wake-up signal, wherein the transmission power is based at least in part on a power offset relative to a downlink reference signal received by the apparatus 902.

The transmission module 912 may transmit a signal 920. In some aspects, signal 920 may identify the capabilities of device 902.

The apparatus may include additional modules for performing each of the blocks in the algorithm in the foregoing flow chart of fig. 6. Thus, each block in the foregoing flow chart of fig. 6 may be performed by one module, and the apparatus may include one or more of these modules. These modules may be one or more hardware components specifically configured to perform the stated processes/algorithms, may be implemented by a processor configured to perform the stated processes/algorithms, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

The number and arrangement of modules shown in fig. 9 are provided as examples only. In implementation, there may be additional modules, fewer modules, different modules, or differently arranged modules than shown in fig. 9. Further, two or more modules shown in fig. 9 may be implemented in a single module, or a single module shown in fig. 9 may be implemented as a plurality of distributed modules. Additionally or alternatively, a set of modules (e.g., one or more modules) shown in fig. 9 may perform one or more functions described as being performed by another set of modules shown in fig. 9.

Fig. 10 is a diagram 1000 illustrating an example of a hardware implementation for an apparatus 902' using a processing system 1002. The apparatus 902' may be a UE.

The processing system 1002 may be implemented with a bus architecture, represented generally by the bus 1004. The bus 1004 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 1002 and the overall design constraints. The bus 1004 links together various circuits including one or more processors and/or hardware modules, represented by the processor 1006, the modules 904, 906, 908, 910, 912, and the computer-readable medium/memory 1008. In addition, bus 1004 may link various other circuits such as clock sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, have not been described any further.

The processing system 1002 may be coupled to a transceiver 1010. The transceiver 1010 is coupled to one or more antennas 1012. The transceiver 1010 provides a means for communicating with various other apparatus over a transmission medium. The transceiver 1010 receives signals from the one or more antennas 1012, extracts information from the received signals, and provides the extracted information to the processing system 1002 (specifically, the receiving module 904). In addition, transceiver 1010 receives information (specifically, transmission module 912) from processing system 1002 and generates signals to be applied to the one or more antennas 1012 based at least in part on the received information. The processing system 1002 includes a processor 1006 coupled to a computer readable medium/memory 1008. The processor 1006 is responsible for general processing, including the execution of software stored on the computer-readable medium/memory 1008. The software, when executed by the processor 1006, causes the processing system 1002 to perform the various functions described supra for any particular apparatus. The computer readable medium/memory 1008 may also be used for storing data that is manipulated by the processor 1006 when executing software. In addition, the processing system includes at least one of the modules 904, 906, 908, 910, and 912. These modules may be software modules running in the processor 1006, resident/stored in the computer readable medium/memory 1008, one or more hardware modules coupled to the processor 1006, or some combination thereof. Processing system 1002 may be a component of UE 120 and may include memory 282 and/or at least one of TX MIMO processor 266, RX processor 258, and/or controller/processor 280.

In some aspects, an apparatus 902/902' for wireless communication comprises: means for monitoring a particular resource of a resource pattern corresponding to wake-up signaling associated with a UE group (which includes means 902/902'), wherein the resource pattern is associated with the UE group; means for receiving a wake-up signal, wherein the wake-up signal corresponds to at least one of a cell identifier or a UE group identifier associated with the apparatus 902/902', wherein the wake-up signal indicates at least a portion of the cell identifier or a portion of the UE group identifier; means for determining a reference value based at least in part on a transmit power of the wake-up signal, wherein the transmit power is based at least in part on a power offset relative to a synchronization signal received by the apparatus 902/902'; means for performing a wake-up to receive a communication based at least in part on receiving the wake-up signal; a unit for receiving a communication; and/or means for monitoring communication between the wake-up signal and a time associated with the maximum delay. The foregoing elements may be one or more of the foregoing modules of apparatus 902 and/or processing system 1002 of apparatus 902' configured to perform the functions recited by these foregoing elements. As described above, the processing system 1002 may include a TX MIMO processor 266, an RX processor 258, and/or a controller/processor 280. Thus, in one configuration, the aforementioned means may be the TX MIMO processor 266, the RX processor 258, and/or the controller/processor 280 configured to perform the functions recited by the aforementioned means.

Fig. 10 is provided as an example. Other examples are possible and may differ from the example described in connection with fig. 10.

Wake-up signal configuration

Fig. 11 is a diagram illustrating an example 1100 of a wake-up signal configuration based at least in part on UE capabilities.

As shown in fig. 11, and as indicated by reference numeral 1110, UE 120 may transmit or provide information identifying the capability. For example, UE 120 may report information identifying whether the receiver of UE 120 is configured to recognize legacy synchronization signals. Additionally or alternatively, UE 120 may report information identifying the detection and/or synchronization time of the receiver of UE 120. Additionally or alternatively, UE 120 may report information identifying the synchronization processing time between the wake-up signal and the subsequent communication. For example, UE 120 may report information indicating whether UE 120 has a first delay (e.g., no delay or 0 ms), a second delay (e.g., a shorter delay or about 15 ms), or a third delay (e.g., a longer delay or about 500 ms). In some cases herein, this delay may be referred to as a gap. In some aspects, this capability may identify a repetition configuration of UE 120 (e.g., a number of repetitions required to decode the communication). In some aspects, this capability may indicate whether UE 120 is associated with a DRX cycle, eDRX cycle, etc.

As shown at reference numeral 1120, BS 110 may determine a configuration for the wake-up signal based at least in part on the information for identifying the capability. The configuration may identify a delay or gap between the wake-up signal and the communication, a number of repetitions of the wake-up signal, and so forth. In some aspects, the configuration may identify resources for the wake-up signal. For example, BS 110 may determine the number of resources used for the wake-up signal, the starting resources of the wake-up signal, one or more antenna ports used for transmitting the wake-up signal, the transmit power used for the wake-up signal, and so on, as described in further detail below. In some aspects, BS 110 may provide information to UE 120 identifying the configuration. This configuration may be referred to herein as a wake-up signal configuration.

In some aspects, BS 110 may determine a delay or gap between the wake-up signal and the communication based at least in part on the capabilities. For example, BS 110 may send the communication after a delay or gap based at least in part on the information identifying the capabilities of UE 120. In some aspects, UE 120 may monitor communications after the delay. Additionally or alternatively, UE 120 may monitor communications for a particular length of time (e.g., maximum delay).

In some aspects, the configuration may be based at least in part on a repeated configuration of UE 120. For example, UE 120 may need a certain number of repetitions to successfully decode the communication (e.g., 1 repetition, 4 repetitions, 16 repetitions, 64 repetitions, 2048 repetitions, etc.). For communications with fewer repetitions than this particular number of repetitions, waking up UE 120 may not be beneficial because decoding of the communications may not be successful.

Accordingly, the length of the wake-up signal resources may be configured based at least in part on the repeated configuration of UE 120. For example, the wake-up signal resource length may be determined based at least in part on a maximum number of repetitions of the communication. The wake-up signal may be transmitted within the wake-up signal resources and the number of resources used for the wake-up signal may be based at least in part on the actual number of repetitions of the communication. UE 120 may monitor particular resources for a wake-up signal based at least in part on the repeated configuration of UE 120.

For example, assume that the maximum number of repetitions of communication is 2048 repetitions. Suppose further that UE 120 is configured with a reduction factor of 16. The reduction factor may identify a relationship between the number of repetitions of the communication and the number of repetitions of the wake-up signal. In this case, the maximum number of repetitions of the wake-up signal is a value M of 128 repetitions (e.g., 2048/16). If communication is to be started in subframe N, the wake-up signal resources may start in subframes N-M, N-2M, N-3M, and so on. More specifically, the wake-up signal resources for UE 120 may begin at respective subframes N-M, N-2M, N-3M, and N-4M. In other words, the communication may be associated with four wake-up signal resources starting from N-M, N-2M, N-3M, and N-4M.

Now assume that the communication has an actual number of repetitions of 128 repetitions. In this case, the length of the wake-up signal may be 8 repetitions (e.g., 128/16) depending on the reduction factor. In some aspects, 8 repetitions of the wake-up signal may be transmitted beginning at the end of each wake-up signal resource (e.g., N-8, N-7, N-1). In some aspects, 8 repetitions of the wake-up signal may be initiated at the beginning of each wake-up resource (e.g., N-M, N-m+1,..fwdarw., N-m+7). In this way, wake-up signal resources are configured based at least in part on the maximum number of repetitions and the actual number of repetitions of the communication.

As indicated by reference numeral 1130, UE 120 may determine whether to detect the wake-up signal based at least in part on the delay or gap. The delay or gap may be the delay between sending the wake-up signal and the communication, and may be referred to herein as a configured delay or gap, a desired delay or gap, a delay, and the like. For example, BS 110 may provide information identifying the delay or gap, etc. In some aspects, UE 120 may determine or select whether to detect a wake-up signal based at least in part on a configured delay or gap configured by base station 110 (e.g., wake-up signal detection may be enabled or disabled). For example, the configured delay or gap may be different from the desired delay or gap associated with UE 120. In some aspects, UE 120 may indicate the selected behavior (e.g., whether wake-up signal detection is enabled or disabled for UE 120) to a base station and/or a Mobility Management Entity (MME).

In some aspects, UE 120 may determine whether to detect the wake-up signal based at least in part on a Discontinuous Reception (DRX) configuration of UE 120. For example, in the case of DRX, UE 120 requires a non-zero gap between the end of the maximum wake-up signal duration and the associated paging occasion. The gap may be used for tracking, channel estimation warm-up, and so on. In the case of eDRX, UE 120 may require longer gaps than DRX, depending on the receiver architecture. If UE 120 uses the receiver to update and/or load images (e.g., software for paging detection) after deep sleep when detecting a wake-up signal, longer gaps are required to perform image updates for paging detection, tracking time, channel estimation warm-up, etc. If UE 120 uses a receiver to obtain updated images, the processing time may be similar to that of DRX, regardless of whether UE 120 detects a wake-up signal.

For DRX, a minimum gap for wake-up signals may be predefined, e.g., 20ms for MTC, 40ms for NB-IoT, etc. For eDRX, some candidate slots for the wake-up signal may be predefined, and UE 120 may report the required minimum slot by selecting one of the candidate slots. For example, one bit may indicate two different candidate minimum gaps (e.g., a short gap and a long gap). The short gap may correspond to a DRX gap, and the long gap may correspond to a 1s gap of NB-IoT or a 2s gap of MTC.

If the base station 110 enables the wake-up signal, the base station 110 may configure the gap to be not less than the minimum gap for the DRX scenario. Otherwise, UE 120 will not expect the wake-up signal to be enabled. If the base station 110 enables the wake-up signal and supports eDRX, the base station 110 may configure the gap based at least in part on the gap reported by the UE 120. However, in some aspects, the configured gap may not be UE-specific. Thus, the configured gap may be different from the required gap of some UEs 120. For example, the configured gap may be greater or less than the required UE gap. In this case, the UE 120 may still detect the wake-up signal, or the UE 120 may not detect the wake-up signal. The UE may select or determine whether to detect a wake-up signal (e.g., whether to enable or disable wake-up signal detection) and may explicitly indicate the selection or determination to the base station 110 and/or MME. For example, UE 120 may indicate one bit signaling to MME, and MME may inform base station 110 in the tracking area of UE 120. Alternatively, the UE behavior may be predefined without additional signaling. Additionally or alternatively, UE selection or determination may not be signaled to the base station 110 and/or MME. In this case, the base station 110 may assume that the UE 120 will detect the wake-up signal and may transmit the wake-up signal when there is a page for the UE 120. However, in this case, nearby UEs 120 may wake up more frequently due to the wake-up signal, and the target UE 120 may not monitor the wake-up signal.

For example, UE 120 may need a long gap for eDRX mode, but base station 110 may configure the gap to be smaller than the UE needs. UE 120 may still determine to detect the wake-up signal within the configured short gap (using the shorter time needed by the receiver, but with less power savings). Under these conditions, if there is a page for the UE 120, the base station 110 should send a wake-up signal. However, UE 120 may not detect the wake-up signal, but may directly detect paging (e.g., each DRX within a Paging Time Window (PTW) in eDRX mode). Thus, in such an implementation, the base station 110 should not send a wake-up signal to avoid waking up other UEs 120.

As another example, UE 120 may require a shorter gap, but base station 110 may be configured with a gap that is greater than the UE's required gap. UE 120 may still determine to detect the wake-up signal, but will have to wait longer for paging after wake-up signal detection. In this case, if there is a page for the UE 120, the base station 110 may transmit a wake-up signal. However, UE 120 may not detect the wake-up signal, but rather directly detect paging (e.g., each DRX within the PTW in eDRX mode). For a UE 120 in good coverage, the power saving gain obtained by using the wake-up signal and burn-up (burn) power during a long gap between the wake-up signal and the associated paging occasion is about the same as if the wake-up signal were not used. Thus, in this implementation, the base station 110 will not transmit a wake-up signal due to paging for the UE 120. By reducing the wake-up signal transmission, the base station 110 may avoid waking up other UEs 120.

BS 110 may send a wake-up signal to UE 120 as shown at reference numeral 1140. For example, BS 110 may transmit a wake-up signal using the configuration determined above in connection with reference numeral 1120. In some aspects, BS 110 may use specific resources to transmit the wake-up signal. For example, BS 110 may transmit a wake-up signal using the resources identified by the configuration, using resources associated with the UE group of UE 120, and so on.

As indicated by reference numeral 1150, the UE 120 may identify a wake-up signal based at least in part on the configuration. For example, UE 120 may monitor resources associated with the wake-up signal based at least in part on the configuration. In some aspects, UE 120 may identify the wake-up signal based at least in part on the preamble of the wake-up signal. In some aspects, UE 120 may not attempt to monitor or identify the wake-up signal. For example, UE 120 may determine that UE 120 is not to monitor for a wake-up signal based at least in part on the delay or gap described above in connection with reference numeral 1130 and may not monitor or identify the wake-up signal.

In some aspects, UE 120 may perform synchronization and/or determine a reference value based at least in part on the wake-up signal. For example, BS 110 may configure a power level for the wake-up signal and may provide information identifying the power level to UE 120 (e.g., via a system information block, radio Resource Control (RRC) signaling, etc.). In some aspects, the information identifying the power level may include a power offset relative to a synchronization signal or a downlink reference signal (e.g., PSS, SSS, NPSS, NSSS, reference Signal (RS), NRS, etc.). UE 120 may perform synchronization and/or determine a reference value based at least in part on the power level of the wake-up signal. In some aspects, when no power offset is specified, UE 120 may use a default offset (e.g., 0dB, etc.).

BS 110 may send communications to UE 120 as indicated by reference numeral 1160. For example, BS 110 may transmit communications using the delays or gaps described above. As indicated by reference numeral 1170, UE 120 may receive or monitor communications. For example, UE 120 may enter an active mode, and may leave an idle mode, may wake up, and so on. In this way, BS 110 and UE 120 determine a configuration for a wake-up signal, and perform communication after transmitting the wake-up signal to UE 120.

Fig. 11 is provided as an example. Other examples are possible and may differ from the example described in connection with fig. 11.

Fig. 12 is a flow chart of a method 1200 of wireless communication. The method may be performed by a base station (e.g., BS 110, apparatus 1402/1402' of fig. 1, etc.).

At 1210, the base station (e.g., using the controller/processor 240, etc.) may determine a configuration for a wake-up signal associated with the UE. For example, the base station may receive information identifying the capabilities of the UE. The base station may use the information identifying the capability to determine a configuration for the wake-up signal. In some aspects, the configuration may identify resources for the wake-up signal, a length of the wake-up signal, a number of repetitions associated with the wake-up signal, a transmission power for the wake-up signal, and so forth. In some aspects, the base station may send information to the UE identifying the configuration. In some aspects, the configuration is determined based at least in part on capabilities of the UE. In some aspects, the capability relates to at least one of: the receiver type or processing time of the UE (e.g., synchronization processing time, tracking processing time, processing time for loading or updating image or control information for paging detection, processing time for channel estimation warm-up, etc.). For example, different UEs may be associated with different receiver types having different hardware architectures. As one example, the UE may perform monitoring for paging using complex baseband processing and may have a low power wake-up receiver (e.g., which may perform correlation or may only perform correlation). The UE may activate the baseband modem only when the low power wake-up receiver detects a wake-up signal. The receiver type may indicate whether the UE is associated with a low power receiver, wake-up receiver, low power wake-up, etc. Additionally or alternatively, the receiver type may indicate a processor performing the monitoring (e.g., a processor for paging monitoring, a processor for wake-up signal monitoring, etc.).

In some aspects, the configuration indication is to delay communication based at least in part on the capability. In some aspects, the delay of the communication is based at least in part on information identifying a minimum delay associated with one or more UEs including the UE.

At 1220, the base station (e.g., using controller/processor 240, transmit processor 220, TX MIMO processor 230, modulator 232, antenna 234, etc.) may transmit a wake-up signal in a resource based at least in part on the configuration. For example, the base station may determine resources for the wake-up signal based at least in part on the configuration. In some aspects, the base station may determine the resource based at least in part on a group of UEs associated with the UE. For example, the base station may select resources corresponding to a group of UEs associated with the UE.

In some aspects, the resource is based at least in part on a number of repetitions of the communication. In some aspects, the resource is based at least in part on an actual number of repetitions of the communication. In some aspects, the one or more first resources and the one or more second resources are multiplexed with resources associated with at least one other UE group of a plurality of UE groups including the first UE group and the second UE group. In some aspects, the UE is configured with a maximum resource duration and the actual resource duration for the wake-up signal is no greater than the configured maximum resource duration. In some aspects, the beginning of the resource is configured based at least in part on the configured maximum resource duration, and a gap or delay prior to communication. In some aspects, the beginning of the resource is aligned with a starting point of the wake-up signal, the starting point being associated with a configured maximum resource duration.

At 1230, the base station (e.g., using the controller/processor 240, etc.) may optionally determine a delay based at least in part on the information identifying the minimum delay. For example, the base station may determine a delay or gap provided between the wake-up signal and the communication. In some aspects, the base station may determine the delay or gap based at least in part on information identifying a minimum delay for one or more UEs. For example, the minimum delay may identify the shortest possible delay for one or more UEs to successfully receive the communication after the wake-up signal.

At 1240, the base station (e.g., using controller/processor 240, transmit processor 220, TX MIMO processor 230, modulator 232, antenna 234, etc.) may transmit the communication to the UE based at least in part on the wake-up signal. For example, the base station may send the communication after a delay or gap. In some aspects, the communication is sent before the configured delay has elapsed. In some aspects, the transmit power of the wake-up signal is configured based at least in part on a power offset related to a downlink reference signal transmitted by the base station. In some aspects, UE 120 may receive or monitor communications. For example, UE 120 may enter an active mode, may leave an idle mode, may wake up, and so on. In this way, BS 110 and UE 120 determine a configuration for a wake-up signal, and perform communication after transmitting the wake-up signal to UE 120.

While fig. 12 illustrates exemplary blocks of a method of wireless communication, in some aspects the method may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than shown in fig. 12. Additionally or alternatively, two or more of the blocks shown in fig. 12 may be performed in parallel.

Fig. 13 is a flow chart of a method 1300 of wireless communication. The method may be performed by a UE (e.g., UE 120, apparatus 1602/1602' of fig. 1, etc.).

At 1305, the UE (e.g., using controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may optionally transmit information identifying the capability to the base station. In some aspects, the capability relates to at least one of: the receiver type of the UE or the processing time of the UE (e.g., synchronization processing time, tracking processing time, processing time for loading or updating image or control information for paging detection, processing time for channel estimation warm-up, etc.). Receiver types are described in more detail elsewhere herein. In some aspects, this capability may identify a minimum delay or gap associated with the UE (e.g., a minimum delay or gap between the wake-up signal and the communication). In some aspects, the UE may provide or signal information identifying the capability. For example, the UE may use Radio Resource Control (RRC), signaling Medium Access Control (MAC) signaling, higher layer signaling, or another type of signaling to send, provide, or signal information identifying the capability.

At 1310, the UE (e.g., using controller/processor 280, transmit processor 264, TX MIMO processor 266, modulator 254, antenna 252, etc.) may optionally provide information identifying the delay or gap desired. The required delay or gap may identify the minimum delay or gap between the wake-up signal and the communication. If the configured delay or gap (e.g., configured by the BS) is shorter than the required delay or gap, the UE may not be able to decode the communication.

At 1315, the UE (e.g., using controller/processor 280, etc.) may optionally determine or choose whether to monitor for wake-up signaling. In some aspects, the UE may determine or choose whether to detect or monitor the wake-up signal based at least in part on the configured delay or gap or the actual delay or gap. For example, the BS may select a delay or gap for the wake-up signal based at least in part on information identifying a desired delay or gap for the UE and/or other UEs. The BS may provide configuration information to the UE identifying the configured delay or gap. The UE may determine whether the configured delay or gap is within a range of the desired delay or gap. The UE may determine to detect the wake-up signal when the configured delay or gap is within a range of the desired delay or gap. The UE may determine not to detect the wake-up signal when the configured delay or gap is not within the limits of the required delay or gap.

At 1320, the UE (e.g., using controller/processor 280, transmit processor 264, TX MIMO processor 266, modulator 254, antenna 252, etc.) may optionally provide information indicating whether the UE is to monitor for a wake-up signal. For example, the UE may provide (e.g., signal, send) information to the BS, where the information indicates whether the UE is to monitor for a wake-up signal. In some aspects, the BS may determine whether to transmit a wake-up signal based at least in part on the information. For example, the BS may determine that the BS is not transmitting a wake-up signal if a threshold number of UEs are not to monitor for wake-up signaling, if one or more UEs are not to monitor for wake-up signaling, and/or the like.

At 1325, the UE (e.g., using antennas 252, demodulator 254, MIMO detector 256, receive processor 258, controller/processor 280, etc.) may monitor for wake-up signaling in resources configured based at least in part on the wake-up signal. For example, the UE may monitor the resources for wake-up signaling. In some aspects, the UE may identify the resource based at least in part on the wake-up signal configuration. For example, the wake-up signal configuration may identify the resource. In some aspects, the wake-up signal configuration may be based at least in part on the capability. In some aspects, the UE may use information in the configuration (e.g., random access configuration, resource pattern, etc.) to determine the resource. In some aspects, the UE may be preconfigured with resources. In some aspects, the UE may identify the wake-up signal based at least in part on a preamble of the wake-up signal, as described in more detail elsewhere herein.

In some aspects, the resource is one of a plurality of resources that the UE monitors for wake-up signaling, wherein the plurality of resources is determined based at least in part on a maximum number of repetitions and an actual number of repetitions associated with the communication. For example, the UE may determine an actual number of repetitions associated with the communication and a maximum number of repetitions associated with the communication. The UE may select a resource of the plurality of resources and may monitor for wake-up signaling on the selected resource, as described in more detail elsewhere herein.

At 1330, the UE (e.g., using antennas 252, demodulator 254, MIMO detector 256, receive processor 258, controller/processor 280, etc.) may receive the wake-up signal. For example, the UE may receive a wake-up signal based at least in part on the monitoring of the wake-up signaling. In some aspects, the UE may detect or identify the wake-up signal (e.g., based at least in part on a preamble of the wake-up signal, a UE group identifier of the UE, a cell identifier of the UE, etc.).

At 1335, the UE (e.g., using antennas 252, demodulator 254, MIMO detector 256, receive processor 258, controller/processor 280, etc.) may optionally perform a synchronization process using the wake-up signal. For example, the BS may configure a power level for the wake-up signal and may provide information identifying the power level to the UE (e.g., via SIB, radio Resource Control (RRC) signaling, etc.). In some aspects, the information identifying the power level may include a power offset relative to a synchronization signal or a downlink reference signal (e.g., PSS, SSS, NPSS, NSSS, RS, NRS, etc.). UE 120 may perform synchronization and/or determine a reference value based at least in part on the power level of the wake-up signal.

At 1340, the UE (e.g., using antennas 252, demodulator 254, MIMO detector 256, receive processor 258, controller/processor 280, etc.) may optionally perform wake-up to receive communications. For example, the UE may identify a wake-up signal and may perform wake-up after a delay or gap to receive the communication. In some aspects, the UE may perform the wake-up after a configured delay or gap. In some aspects, the UE may perform wake-up to receive data communications, control communications, paging, and so on.

At 1345, the UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receive processor 258, controller/processor 280, etc.) may optionally monitor for communications between the wake-up signal and the time associated with the configured delay. For example, the UE may begin monitoring after receiving the wake-up signal, and may monitor until the end of the time associated with the configured delay.

At 1350, the UE (e.g., using antennas 252, demodulators 254, MIMO detector 256, receive processor 258, controller/processor 280, etc.) may receive the communication. For example, the UE may receive a communication after performing a wake-up. In some aspects, the communication is received after a delay based at least in part on the capabilities of the UE. In some aspects, the UE may send information identifying its capabilities to the base station that sent the communication. In some aspects, the communication is received before the maximum delay has elapsed.

While fig. 13 illustrates exemplary blocks of a method of wireless communication, in some aspects the method may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than shown in fig. 13. Additionally or alternatively, two or more of the blocks shown in fig. 13 may be performed in parallel.

Fig. 14 is a conceptual data flow diagram 1400 illustrating the data flow between different modules/means/components in an exemplary apparatus 1402. The apparatus 1402 may be a base station such as an eNB, a gNB, or the like. In some aspects, the apparatus 1402 includes a receiving module 1404, a determining module 1406, and a transmitting module 1408.

The receive module 1404 may receive a signal 1410 from a UE 1450 (e.g., UE 120, etc.). In some aspects, the signal 1410 may identify the capabilities of the UE 1450. The receiving module may provide data 1412 to the determining module 1406. In some aspects, the data 1412 may identify the capability. In some aspects, the signal 1410 and/or the data 1412 may indicate whether the UE has determined to monitor or detect wake-up signaling. For example, signal 1410 and/or data 1412 may indicate that the UE is to monitor or detect wake-up signaling, or may indicate that the UE is not to monitor or detect wake-up signaling. In some aspects, the signal 1410 and/or the data 1412 may identify a minimum or required delay for one or more UEs.

The determination module 1406 may determine a configuration for the wake-up signal based at least in part on the data 1412. In some aspects, the determination module 1406 may determine a delay for transmission of the communication based at least in part on information identifying a minimum or required delay for one or more UEs. In some aspects, the determination module 1406 may determine resources for the wake-up signal. The determination module 1406 may provide data 1414 to the transmission module 1408. For example, the data 1414 may indicate resources for a wake-up signal, may identify a wake-up signal, may indicate that the transmit module 1408 is to generate and/or transmit a wake-up signal, and so forth.

The transmit module 1408 may transmit a wake-up signal and/or transmit communications based at least in part on the wake-up signal. For example, the transmitting module 1406 may generate a signal 1416 and the apparatus 1402 may transmit the signal 1416 to the UE 1450. The signal 1416 may include a wake-up signal, communication, and/or other information (e.g., configuration for the wake-up signal, etc.).

The apparatus may include additional modules for performing each of the blocks in the algorithm in the foregoing flow chart of fig. 12. Thus, each block in the foregoing flow chart of fig. 12 may be performed by one module, and the apparatus may include one or more of these modules. These modules may be one or more hardware components specifically configured to perform the stated processes/algorithms, implemented by a processor configured to perform the stated processes/algorithms, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

The number and arrangement of modules shown in fig. 14 is provided as one example. When implemented, there may be additional modules, fewer modules, different modules, or differently arranged modules than those shown in fig. 14. Further, two or more modules shown in fig. 14 may be implemented in a single module, or a single module shown in fig. 14 may be implemented as a plurality of distributed modules. Additionally or alternatively, a set of modules (e.g., one or more modules) shown in fig. 14 may perform one or more functions described as being performed by another set of modules shown in fig. 14.

Fig. 15 is a diagram 1500 illustrating an example of a hardware implementation for an apparatus 1402' using a processing system 1502. The apparatus 1402' may be a base station such as an eNB, a gNB, or the like.

The processing system 1502 may be implemented using a bus architecture, represented generally by the bus 1504. The bus 1504 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 1502 and the overall design constraints. The bus 1504 links together various circuits including one or more processors and/or hardware modules, represented by the processor 1506, the modules 1404, 1406, 1408, and the computer-readable medium/memory 1508. In addition, bus 1504 may also link various other circuits such as clock sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.

The processing system 1502 may be coupled to a transceiver 1510. The transceiver 1510 is coupled to one or more antennas 1512. The transceiver 1510 provides a means for communicating with various other apparatus over a transmission medium. The transceiver 1510 receives signals from the one or more antennas 1512, extracts information from the received signals, and provides the extracted information to the processing system 1502 (specifically, the receiving module 1404). In addition, the transceiver 1510 receives information from the processing system 1502 (specifically, the transmit module 1408) and generates signals to be applied to the one or more antennas 1512 based at least in part on the received information. The processing system 1502 includes a processor 1506 coupled to a computer-readable medium/memory 1508. The processor 1506 is responsible for general processing, including the execution of software stored on the computer-readable medium/memory 1508. The software, when executed by the processor 1506, causes the processing system 1502 to perform the various functions described supra for any particular apparatus. The computer-readable medium/memory 1508 may also be used for storing data that the processor 1506 operates on when executing software. The processing system also includes at least one of modules 1404 and 1406. These modules may be software modules running in the processor 1506, resident/stored in the computer readable medium/memory 1508, one or more hardware modules coupled to the processor 1506, or some combination thereof. Processing system 1502 may be a component of BS 110 and may include memory 242 and/or at least one of TX MIMO processor 230, receive processor 238, and/or controller/processor 240.

In some aspects, an apparatus 1402/1402' for wireless communication includes: a means for transmitting a wake-up signal, a means for transmitting a communication based at least in part on the wake-up signal, and the like. The foregoing elements may be one or more of the foregoing modules of apparatus 1402 and/or processing system 1502 of apparatus 1402' configured to perform the functions described by these foregoing elements. As described above, the processing system 1502 may include a TX MIMO processor 230, a receive processor 238, and/or a controller/processor 240. Thus, in one configuration, the aforementioned means may be the TX MIMO processor 230, the receive processor 238, and/or the controller/processor 240 configured to perform the functions recited by the aforementioned means.

Fig. 15 is provided as an example. Other examples are possible and may differ from the example described in connection with fig. 15.

Fig. 16 is a conceptual data flow diagram 1600 illustrating the data flow between different modules/means/components in an exemplary apparatus 1602. The apparatus 1602 may be, for example, a UE. In some aspects, the apparatus 1602 includes a receiving module 1604, a determining module 1606, a monitoring module 1608, an executing module 1610, and/or a transmitting module 1612.

The receiving module 1604 may receive the signal 1614 from the BS 1650. In some aspects, the signal 1614 may include a wake-up signal and/or communications associated with the wake-up signal. In some aspects, the signal 1614 may include information related to the wake-up signal configuration, or may include the wake-up signal configuration. The receiving module 1604 may process the signal 1614 and provide data 1616 to the determining module 1606 and/or data 1620 to the monitoring module 1608.

The determination module 1606 may determine whether the device 1602 is to monitor for wake-up signaling. For example, the determination module 1606 may determine whether the configured delay or gap (identified by the data 1616) is within a desired delay or gap range for the device 1602. The determination module 1606 may provide data 1618 to the monitoring module 1608 indicating whether the UE is to monitor for wake-up signaling.

The monitoring module 1608 may monitor resources for wake-up signaling. For example, the monitoring module 1608 may process the data 1620 to identify a wake-up signal. In some aspects, the monitoring module 1608 may process the data 1620 based at least in part on the data 1618, where the data 1618 may indicate whether to monitor for a wake-up signal. The monitoring module 1608 may provide data 1622 to the execution module 1612. The data 1622 may identify the wake-up signal and/or one or more parameters associated with the wake-up signal (e.g., power level, etc.).

The execution module 1610 may perform the synchronization process based at least in part on the data 1622. For example, the execution module 1610 may perform the synchronization process based at least in part on the wake-up signal and/or one or more parameters associated with the wake-up signal. In some aspects, the execution module 1610 may perform wake-up (or may cause the device 1602 to perform wake-up) to receive communications based at least in part on the data 1622. In some aspects, the execution module 1610 may wake up the receiving module 1604 to monitor communications, receive communications, and so on.

The transmit module 1614 may transmit the signal 1624. In some aspects, signal 1624 may identify the capabilities of device 1602. In some aspects, signal 1624 may identify a desired delay or gap for device 1602. In some aspects, the signal 1624 may indicate whether the device 1602 is to monitor for wake-up signaling.

The apparatus may include additional modules for performing each of the blocks in the algorithm in the foregoing flow chart of fig. 13. Thus, each block in the foregoing flow chart of fig. 13 may be performed by one module, and the apparatus may include one or more of these modules. These modules may be one or more hardware components specifically configured to perform the stated processes/algorithms, implemented by a processor configured to perform the stated processes/algorithms, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

The number and arrangement of modules shown in fig. 16 are provided as an example only. When implemented, there may be additional modules, fewer modules, different modules, or differently arranged modules than those shown in fig. 16. Further, two or more modules shown in fig. 16 may be implemented in a single module, or a single module shown in fig. 16 may be implemented as a plurality of distributed modules. Additionally or alternatively, a set of modules (e.g., one or more modules) shown in fig. 16 may perform one or more functions described as being performed by another set of modules shown in fig. 16.

Fig. 17 is a diagram 1700 illustrating an example of a hardware implementation for an apparatus 1602' using a processing system 1702. The apparatus 1602' may be a UE.

The processing system 1702 may be implemented using a bus architecture, represented generally by the bus 1704. The bus 1704 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 1702 and the overall design constraints. The bus 1704 links together various circuits including one or more processors and/or hardware modules, represented by the processor 1706, the modules 1604, 1606, 1608, 1610, 1612, and the computer-readable medium/memory 1708. In addition, the bus 1704 may also link various other circuits such as clock sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.

The processing system 1702 may be coupled to a transceiver 1710. The transceiver 1710 is coupled to one or more antennas 1712. The transceiver 1710 provides a unit that communicates with various other devices over a transmission medium. The transceiver 1710 receives signals from the one or more antennas 1712, extracts information from the received signals, and provides the extracted information to the processing system 1702 (specifically, the receiving module 1604). In addition, the transceiver 1710 receives information (specifically, the transmission module 1612) from the processing system 1702 and generates a signal to be applied to the one or more antennas 1712 based at least in part on the received information. The processing system 1702 includes a processor 1706 coupled to a computer-readable medium/memory 1708. The processor 1706 is responsible for general processing, including the execution of software stored on the computer-readable medium/memory 1708. The software, when executed by the processor 1706, causes the processing system 1702 to perform the various functions described supra for any particular apparatus. The computer readable medium/memory 1708 may also be used for storing data that is manipulated by the processor 1706 when executing software. In addition, the processing system also includes at least one of modules 1604, 1606, 1608, 1610, and 1612. These modules may be software modules running in the processor 1706, resident/stored in the computer readable medium/memory 1708, one or more hardware modules coupled to the processor 1706, or some combination thereof. Processing system 1702 may be a component of UE 120 and may include memory 282 and/or at least one of TX MIMO processor 266, RX processor 258, and/or controller/processor 280.

In some aspects, an apparatus 1602/1602' for wireless communication includes: means for monitoring wake-up signaling in resources based at least in part on a wake-up signal configuration, wherein the wake-up signal configuration is based at least in part on capabilities of the apparatus 1602/1602'; means for receiving a wake-up signal in the resource; and means for receiving a communication based at least in part on the wake-up signal; means for performing a wake-up to receive a communication based at least in part on the wake-up signal; means for transmitting information identifying the capability to a base station; means for monitoring communication between the wake-up signal and a time associated with the configured delay; determining or selecting whether to monitor for wake-up signaling based at least in part on a delay or gap configured by the base station; means for providing, by the device 1602/1602', an indication of whether the device 1602/1602' monitors for wake-up signaling; means for performing a synchronization procedure using a wake-up signal in a configuration period of at least one discontinuous reception cycle; and/or means for providing, by the apparatus 1602/1602', for identifying a desired delay or gap, wherein the desired delay or gap is one of a plurality of candidate delays or gaps. The foregoing elements may be one or more of the foregoing modules of the apparatus 1602 and/or the processing system 1702 of the apparatus 1602' configured to perform the functions described by these foregoing elements. As described above, the processing system 1702 may include a TX MIMO processor 266, an RX processor 258, and/or a controller/processor 280. Thus, in one configuration, the aforementioned means may be the TX MIMO processor 266, the RX processor 258, and/or the controller/processor 280 configured to perform the functions recited by the aforementioned means.

Fig. 17 is provided as an example. Other examples are also possible and may differ from the example described in connection with fig. 17.

It should be understood that the specific order or hierarchy of blocks in the processes/flowcharts disclosed herein is but one example of an example approach. It should be appreciated that the particular order or hierarchy of blocks in the processes/flowcharts may be rearranged based on design preferences. In addition, some blocks may be combined or omitted. The accompanying method claims present elements of the various blocks in a sample order, and are not meant to be limited to the specific order or hierarchy presented.

The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects as well. Thus, the claims are not intended to be limited to the aspects shown herein, but is to be accorded the full scope consistent with the language of the claims, wherein reference to an element in the singular is not intended to mean "one and only one" unless specifically so stated, but rather "one or more". The term "exemplary" as used herein means "serving as an example, instance, or illustration. Any aspect described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects. The term "some" refers to one or more unless specifically stated otherwise. Combinations such as "at least one of A, B or C", "at least one of A, B and C", and "A, B, C, or any combination thereof", include any combination of A, B and/or C, and may include a plurality of a, a plurality of B, or a plurality of C. Specifically, combinations such as "at least one of A, B or C", "at least one of A, B or C", and "A, B, C, or any combination thereof, may be a alone, B alone, C, A and B, A and C, B and C, or a and B and C, wherein any such combination may comprise one or more members of A, B or C. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Furthermore, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. No element of a claim should be construed as a means-plus-function unless the element is explicitly recited in the word "unit for … …".

Claims (46)

1. A method of wireless communication performed by a base station, comprising:

the wake-up signal is sent using a resource selected from one of:

one or more first resources of the first resource pattern, or

One or more second resources of the second resource pattern,

wherein the resources are selected from the one or more first resources or the one or more second resources based at least in part on whether the wake-up signal is for a user equipment UE associated with a first group of UEs or a second group of UEs, wherein the one or more first resources are in a first group of subframes and the one or more second resources are in a second group of subframes, and wherein the wake-up signal indicates that the UE is to be in an active mode; and

based at least in part on the wake-up signal, a communication is sent to the UE.

2. The method of claim 1, wherein the one or more first resources alternate with the one or more second resources in the time domain.

3. The method of claim 1, wherein the first resource pattern is associated with a first antenna port and the second resource pattern is associated with a second antenna port.

4. The method of claim 1, wherein the wake-up signal is transmitted using a different antenna port than a synchronization signal or a reference signal for the UE.

5. The method of claim 1, wherein the wake-up signal is transmitted using the same antenna port within at least a single subframe.

6. The method of claim 1, wherein the number of the one or more first resources or the number of the one or more second resources is configurable or predefined.

7. The method of claim 1, wherein the one or more first resources and the one or more second resources comprise physical resource blocks.

8. The method of claim 1, wherein the one or more first resources alternate with the one or more second resources in the frequency domain.

9. The method of claim 1, wherein resources of the one or more first resources or the one or more second resources vary in time and frequency domains.

10. The method of claim 1, wherein a preamble of the wake-up signal identifies a UE group of the first and second UE groups with which the wake-up signal is associated.

11. The method of claim 1, wherein a preamble of the wake-up signal identifies a cell with which the UE is associated.

12. The method of claim 1, wherein configuration information identifying the first UE group and the second UE group is provided in system information.

13. The method of claim 1, wherein a transmission power of the wake-up signal is configured based at least in part on a power offset relative to a downlink reference signal transmitted by the base station.

14. The method of claim 1, wherein UE groups of the first and second UE groups are allocated to the UE based at least in part on paging slots of the UE.

15. A method of wireless communication performed by a user equipment, UE, comprising:

monitoring a particular resource of a resource pattern for wake-up signaling associated with a UE group comprising the UE, wherein the resource pattern is associated with the UE group, and wherein the particular resource is in a set of subframes; and

a wake-up signal is received, wherein the wake-up signal corresponds to at least one of a cell identifier or a UE group identifier associated with the UE, wherein the wake-up signal indicates at least a portion of the cell identifier or a portion of the UE group identifier, and wherein the wake-up signal indicates that the UE is to be in an active mode.

16. The method of claim 15, wherein the portion of the UE group identifier is indicated by a preamble of the wake-up signal.

17. The method of claim 15, wherein configuration information indicating that the UE is associated with the group of UEs is received by the UE in system information.

18. The method of claim 15, wherein the UE group is allocated to the UE based at least in part on parameters of a paging narrowband of the UE and based at least in part on a number of UE groups.

19. The method of claim 15, wherein the UE is configured to determine the UE group based at least in part on a total number of UE groups, wherein the UE identifies the total number of UE groups based at least in part on system information or configuration information.

20. The method of claim 15, wherein the group of UEs is configured or defined prior to detecting the wake-up signal.

21. The method of claim 15, wherein the wake-up signal is received based further at least in part on a parameter of a preamble of the wake-up signal, wherein the UE is configured to detect the parameter of the preamble.

22. The method of claim 15, further comprising:

performing a wake-up to receive a communication based at least in part on receiving the wake-up signal; and

the communication is received.

23. The method of claim 15, wherein the resource pattern is associated with an antenna port.

24. A base station for wireless communication, comprising:

a memory; and

one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:

the wake-up signal is sent using a resource selected from one of:

one or more first resources of the first resource pattern, or

One or more second resources of the second resource pattern,

wherein the resources are selected from the one or more first resources or the one or more second resources based at least in part on whether the wake-up signal is for a user equipment UE associated with a first group of UEs or a second group of UEs, wherein the one or more first resources are in a first group of subframes and the one or more second resources are in a second group of subframes, and wherein the wake-up signal indicates that the UE is to be in an active mode; and

Based at least in part on the wake-up signal, a communication is sent to the UE.

25. The base station of claim 24, wherein the one or more first resources alternate with the one or more second resources in the time domain.

26. The base station of claim 24, wherein the first resource pattern is associated with a first antenna port and the second resource pattern is associated with a second antenna port.

27. The base station of claim 24, wherein the wake-up signal is transmitted using a different antenna port than a synchronization signal or a reference signal for the UE.

28. The base station of claim 24, wherein the wake-up signal is transmitted using the same antenna port within at least a single subframe.

29. The base station of claim 24, wherein the number of the one or more first resources or the number of the one or more second resources is configurable or predefined.

30. The base station of claim 24, wherein the one or more first resources and the one or more second resources comprise physical resource blocks.

31. The base station of claim 24, wherein the one or more first resources alternate with the one or more second resources in the frequency domain.

32. The base station of claim 24, wherein the resources of the one or more first resources or the one or more second resources vary in time and frequency domains.

33. The base station of claim 24, wherein a preamble of the wake-up signal identifies a UE group of the first and second UE groups with which the wake-up signal is associated.

34. The base station of claim 24, wherein a preamble of the wake-up signal identifies a cell with which the UE is associated.

35. The base station of claim 24, wherein configuration information identifying the first UE group and the second UE group is provided in system information.

36. The base station of claim 24, wherein a transmission power of the wake-up signal is configured based at least in part on a power offset relative to a downlink reference signal transmitted by the base station.

37. The base station of claim 24, wherein UE groups of the first and second UE groups are allocated to the UE based at least in part on paging slots of the UE.

38. A user equipment, UE, for wireless communication, comprising:

a memory; and

One or more processors operatively coupled to the memory, the memory and the one or more processors configured to:

monitoring a particular resource of a resource pattern for wake-up signaling associated with a UE group comprising the UE, wherein the resource pattern is associated with the UE group, and wherein the particular resource is in a set of subframes; and

a wake-up signal is received, wherein the wake-up signal corresponds to at least one of a cell identifier or a UE group identifier associated with the UE, wherein the wake-up signal indicates at least a portion of the cell identifier or a portion of the UE group identifier, and wherein the wake-up signal indicates that the UE is to be in an active mode.

39. The UE of claim 38, wherein the portion of the UE group identifier is indicated by a preamble of the wake-up signal.

40. The UE of claim 38, wherein configuration information indicating that the UE is associated with the group of UEs is received by the UE in system information.

41. The UE of claim 38, wherein the UE group is allocated to the UE based at least in part on parameters of a paging narrowband of the UE and based at least in part on a number of UE groups.

42. The UE of claim 38, wherein the UE is configured to determine the UE group based at least in part on a total number of UE groups, wherein the UE identifies the total number of UE groups based at least in part on system information or configuration information.

43. The UE of claim 38, wherein the UE group is configured or defined prior to detecting the wake-up signal.

44. The UE of claim 38, wherein the wake-up signal is received based further at least in part on a parameter of a preamble of the wake-up signal, wherein the UE is configured to detect the parameter of the preamble.

45. The UE of claim 38, wherein the one or more processors are further configured to:

performing a wake-up to receive a communication based at least in part on identifying the wake-up signal; and

the communication is received.

46. The UE of claim 38, wherein the resource pattern is associated with an antenna port.