Optimized paging reception based on target paging loss rate for IoT devices

Abstract

A method for enabling a base station to adjust an error rate for paging and to notify a UE of such error rate in order to optimize or reduce the configuration of network paging resources. An apparatus determines a target loss rate for paging on a downlink narrowband control channel. The apparatus transmits an indication of the target loss rate to one or more UEs. The indication is transmitted in system information or a dedicated downlink channel.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Indian Patent Application No. 201941023646, filed on June 14, 2019, entitled “Optimized Page Reception based on Target Page Miss Rate for IoT Devices,” and U.S. Patent Application No. 16 / 900,668, filed on June 12, 2020, entitled “Optimized Page Reception based on Target Page Miss Rate for IoT Devices,” both of which are expressly incorporated herein by reference in their entirety. Background Art Technical Field

[0003] The present disclosure relates generally to communication systems and, more particularly, to optimizing paging procedures in narrowband devices.

[0004] introduction

[0005] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcast. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple access technologies 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, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0006] These multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different wireless devices to communicate at city, country, region, and even global levels. An example telecommunication standard is 5G New Radio (NR). 5G NR is a part of the continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)) and other requirements. 5GNR includes services associated with enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low latency communication (URLLC). Some aspects of 5G NR can be based on 4G Long Term Evolution (LTE) standards. There is a need for further improvements to 5G NR technology. These improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies.

[0007] Overview

[0008] A brief summary of one or more aspects is given below to provide a basic understanding of such aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be presented later.

[0009] Narrowband communication involves using a limited frequency bandwidth for communication, as compared to the frequency bandwidth used for LTE communication. One example of narrowband communication is narrowband (NB) IoT (NB-IoT) communication, which may be limited to a single resource block (RB) of the system bandwidth, e.g., 180 kHz. Another example of narrowband communication is enhanced machine type communication (eMTC), which may be limited to six RBs of the system bandwidth, e.g., 1.08 MHz. NB-IoT communication and / or eMTC may reduce device complexity, achieve multi-year battery life, and provide deeper coverage to reach challenging locations, such as deep inside buildings.

[0010] In wireless communication, base stations and UEs send different notification and paging signals to each other to facilitate communication. These signals can help improve overall communication system information, as well as improve access and control of each device within the wireless system. In some instances, a wake-up signal (WUS) can be sent from a base station to a UE to provide notification of an upcoming paging opportunity (PO). When sending and receiving multiple WUS and PO, it may be beneficial to determine a strategy and / or save the number of WUS and PO sent throughout the wireless system. By doing so, the overall power consumption of the wireless system can be improved. However, some UEs (such as narrowband (NB) IoT devices) may experience paging reception problems due to signal fading. Compared to the frequency bandwidth used for LTE communication, narrowband communication involves using a limited frequency bandwidth for communication. Idle mode paging reception of NB-IoT devices may be limited by deep signal fading, so that the network may need to schedule a large number of WUS and / or paging repetitions so that the NB-IoT device has reliable paging.

[0011] The present disclosure allows a base station to adjust its paging loss rate for a UE (e.g., a NB-IoT device) so that the UE can optimize its WUS reception by using fewer WUS repetitions, which can reduce the amount of resources that the base station may need to schedule in order for the NB-IoT device to have reliable paging.

[0012] In one aspect of the present disclosure, a method, a computer readable medium, and an apparatus are provided. The apparatus may be a device at a base station. The apparatus may be a processor and / or a modem at a base station or the base station itself. The apparatus determines a target loss rate for paging on a downlink narrowband control channel. The apparatus transmits an indication of the target loss rate to one or more user equipments (UEs).

[0013] In one aspect of the present disclosure, a method, a computer readable medium, and an apparatus are provided. The apparatus may be a device at a UE. The apparatus may be a processor and / or a modem at the UE or the UE itself. The apparatus receives an indication of a target loss rate for a downlink narrowband control channel from a base station. The apparatus adjusts a discontinuous reception (DRX) cycle based on the target loss rate for the narrowband downlink control channel.

[0014] To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims.

[0015] The following description and drawings set forth in detail certain illustrative features of the one or more aspects. However, these features are merely indicative of a few of the various ways in which the principles of the various aspects may be employed, and this description is intended to cover all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0018] Figure 2A , 2B , 2C, and 2D are diagrams illustrating examples of an NB frame structure for in-band deployment within an LTE carrier (even radio frames), an NB frame structure for in-band deployment within an LTE carrier (odd radio frames), an NB frame structure for guard band / stand-alone deployment within an LTE carrier (even radio frames), and an NB frame structure for guard band / stand-alone deployment within an LTE carrier (even radio frames), respectively.

[0019] Figure 3 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0020] Figure 4 is a diagram illustrating an example of fading gain distribution.

[0021] Figure 5 is a diagram illustrating a DRX cycle in accordance with certain aspects of the present disclosure.

[0022] Figure 6 is a call flow diagram of signaling between a UE and a base station according to certain aspects of the present disclosure.

[0023] Figure 7 is a flow chart of a wireless communication method.

[0024] Figure 8 is a diagram illustrating an example of a hardware implementation for an example device.

[0025] Fig. 9 is a flow chart of a wireless communication method.

[0026] Fig.10 is a diagram illustrating an example of a hardware implementation for an example device.

[0027] Detailed Description

[0028] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. This detailed description includes specific details to provide a thorough understanding of the various concepts. However, it will be apparent to those 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 diluting such concepts.

[0029] Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (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 on the specific application and the design constraints imposed on the overall system.

[0030] As an example, an element, or any part of an element, or any combination of elements may be implemented as a "processing system" including one or more processors. Examples of processors include: microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout this disclosure. One or more processors in a processing system may execute software. Software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether it is described in software, firmware, middleware, microcode, hardware description languages, or other terms.

[0031] Accordingly, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, each function may be stored or encoded on a computer-readable medium as one or more instructions or codes. Computer-readable media include computer storage media. Storage media may be any available medium that can be accessed by a computer. As an example and not limitation, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, a combination of computer-readable media of the above types, or any other medium that can be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0032] Figure 11 is a diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)). The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). A macro cell includes a base station. A small cell includes a femto cell, a pico cell, and a micro cell.

[0033] The base station 102 configured for 4G LTE (collectively referred to as the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with the EPC 160 via a first backhaul link 132 (e.g., an S1 interface). The base station 102 configured for 5G NR (collectively referred to as the Next Generation RAN (NG-RAN)) can interface with the core network 190 via a second backhaul link 184. Among other functions, the base station 102 can also perform one or more of the following functions: delivery of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment tracking, RAN information management (RIM), paging, positioning, and delivery of alert messages. The base stations 102 may communicate with each other directly or indirectly (eg, through the EPC 160 or the core network 190) over a third backhaul link 134 (eg, an X2 interface). The first backhaul link 132, the second backhaul link 184, and the third backhaul link 134 may be wired or wireless.

[0034] Base stations 102 may communicate wirelessly with UE 104. Each base station 102 may provide communication coverage for a corresponding geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102' may have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network including both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved B node (eNB) (HeNB), which may provide services to a restricted group referred to as a closed subscriber group (CSG). A communication link 120 between a base station 102 and a UE 104 may include an uplink (UL) (also referred to as a reverse link) transmission from the UE 104 to the base station 102 and / or a downlink (DL) (also referred to as a forward link) transmission from the base station 102 to the UE 104. The communication link 120 may use multiple input multiple output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmit diversity. These communication links may be through one or more carriers. The base station 102 / UE 104 may use spectrum of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.) bandwidth for each carrier allocated in the carrier aggregation for a total of up to Yx MHz (x component carriers) for transmission in each direction. The carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated to DL compared to UL). The component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell) and the secondary component carrier may be referred to as a secondary cell (SCell).

[0035] Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication may be through a variety of wireless D2D communication systems, such as, for example, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0036] The wireless communication system may further include a Wi-Fi access point (AP) 150 communicating with a Wi-Fi station (STA) 152 in the 5 GHz unlicensed spectrum via a communication link 154. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) prior to communication to determine whether the channel is available.

[0037] The small cell 102' may operate in a licensed and / or unlicensed spectrum. When operating in an unlicensed spectrum, the small cell 102' may employ NR and use the same 5 GHz unlicensed spectrum as used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum may boost the coverage of the access network and / or increase the capacity of the access network.

[0038] Whether a small cell 102' or a large cell (e.g., a macro base station), the base station 102 may include and / or be referred to as an eNB, a gB node (gNB), or another type of base station. Some base stations (such as gNB 180) may operate in traditional sub-6 GHz spectrum, millimeter wave (mmW) frequencies, and / or near mmW frequencies to communicate with UE 104. When the gNB 180 operates in mmW or near mmW frequencies, the gNB 180 may be referred to as a mmW base station. Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 mm and 10 mm. The radio waves in this band may be referred to as millimeter waves. Near mmW can extend down to 3 GHz frequencies with a wavelength of 100 mm. The super high frequency (SHF) band extends between 3 GHz and 30 GHz, which is also referred to as centimeter waves. Communications using mmW / near mmW radio frequency (RF) bands (e.g., 3 GHz–300 GHz) have extremely high path loss and short range. The mmW base station 180 may utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short range. The base station 180 and the UE 104 may each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays to facilitate beamforming.

[0039] Base station 180 may transmit beamformed signals to UE 104 in one or more transmit directions 182'. UE 104 may receive beamformed signals from base station 180 in one or more receive directions 182". UE 104 may also transmit beamformed signals to base station 180 in one or more transmit directions. Base station 180 may receive beamformed signals from UE 104 in one or more receive directions. Base station 180 / UE 104 may perform beam training to determine the best receive direction and transmit direction for each of base station 180 / UE 104. The transmit direction and receive direction of base station 180 may be the same or may be different. The transmit direction and receive direction of UE 104 may be the same or may be different.

[0040] The EPC 160 may include a mobility management entity (MME) 162, other MMEs 164, a serving gateway 166, a multimedia broadcast multicast service (MBMS) gateway 168, a broadcast multicast service center (BM-SC) 170, and a packet data network (PDN) gateway 172. The MME 162 may be in communication with a home subscriber server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 104 and the EPC 160. In general, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are delivered through the serving gateway 166, which itself is connected to the PDN gateway 172. The PDN gateway 172 provides UE IP address allocation and other functions. The PDN gateway 172 and the BM-SC 170 are connected to IP services 176. The IP services 176 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a PS streaming service, and / or other IP services. The BM-SC 170 may provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS transmissions, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS gateway 168 may be used to distribute MBMS traffic to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area that broadcasts a specific service, and may be responsible for session management (start / stop) and for collecting eMBMS-related charging information.

[0041] The core network 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. The AMF 192 may be in communication with a unified data management (UDM) 196. The AMF 192 is a control node that handles signaling between the UE 104 and the core network 190. In general, the AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are delivered through the UPF 195. The UPF 195 provides UE IP address allocation and other functions. The UPF 195 is connected to an IP service 197. The IP service 197 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a packet switching (PS) streaming (PSS) service, and / or other IP services.

[0042] A base station may include and / or be referred to as a gNB, a Node B, an eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmission reception point (TRP), or some other suitable term. Base station 102 provides an access point to EPC 160 or core network 190 for UE 104. Examples of UE 104 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a tablet device, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a health care device, an implant, a sensor / actuator, a display, or any other similar functional device. Some UEs 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, ovens, vehicles, heart monitors, etc.). UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.

[0043] Refer again Figure 1 In some aspects, the base station 102 may be configured to enhance paging reliability for a UE (e.g., a NB-IoT device) by improving the manner in which the UE performs paging procedures so that the UE may reduce the number of WUS receptions that need to be monitored in a DRX cycle. For example, Figure 1The base station 102 includes a target loss rate component 198 configured to determine a target loss rate for paging on a downlink narrowband control channel. The base station 102 determines a target loss rate for paging on a downlink narrowband control channel. The base station 102 transmits an indication of the target loss rate to one or more UEs.

[0044] Refer again Figure 1 In some aspects, the UE 104 may be configured to operate according to a target loss rate determined by the base station and utilize a reduced amount of WUS repetitions in order to optimize WUS reception. For example, Figure 1 The UE 104 includes a DRX cycle component 199 configured to adjust the DRX cycle based on a target loss rate for a narrowband downlink control channel. The UE 104 receives an indication of a target loss rate for a downlink narrowband control channel from the base station 102. The UE 104 adjusts the DRX cycle based on the target loss rate for the narrowband downlink control channel.

[0045] Although the following description may focus on NB-IoT, the concepts described herein may be applicable to other similar areas such as LTE, LTE-A, CDMA, GSM, 5G NR, and other wireless technologies.

[0046] Figure 2A is a diagram 200 illustrating an example of a NB frame structure (even radio frames) for in-band deployment within an LTE carrier. Figure 2B is a diagram 225 illustrating an example of a NB frame structure (odd radio frames) for in-band deployment within an LTE carrier. Figure 2C is a diagram 250 illustrating an example of a NB frame structure (even radio frames) for guard band / stand-alone deployment within an LTE carrier. Figure 2D275 is an illustration of an example of a NB frame structure (even radio frame) for a guard band / stand-alone deployment within an LTE carrier. Other wireless communication technologies may have different frame structures and / or different channels. A radio frame (10 ms) may be divided into 10 equally sized subframes (e.g., subframe 0-subframe 9). Each subframe may include two consecutive time slots (e.g., time slot 0 and time slot 1). A resource grid may be used to represent these two time slots, each time slot including one or more time-concurrent RBs (also referred to as physical RBs (PRBs)) of 180 kHz. The resource grid is divided into a plurality of resource elements (REs). For a normal cyclic prefix, an RB may include 12 consecutive subcarriers in the frequency domain and 7 consecutive symbols in the time domain (orthogonal frequency division multiplexing (OFDM) symbols for DL; SC-FDMA symbols for UL), for a total of 84 REs. For an extended cyclic prefix, an RB may include 12 consecutive subcarriers in the frequency domain and 6 consecutive symbols in the time domain, for a total of 72 REs. The number of bits carried by each RE depends on the modulation scheme. In-band deployment of NB-IoT can utilize RBs within an LTE carrier. Guard band deployment of NB-IoT can utilize unused RBs within the guard band of an LTE carrier. Standalone deployment of NB-IoT can utilize RBs within a Global System for Mobile Communications (GSM) carrier.

[0047] like Figures 2A-2D As explained in , some REs in each subframe carry NB Reference Signals (NRS) that can be used for broadcast transmission or dedicated DL transmission, regardless of whether data is actually transmitted. Depending on the transmission scheme, the NRS may be transmitted on one antenna port or on two antenna ports (e.g., antenna port 0 and antenna port 1). The value of the NRS may be similar to the cell-specific reference signal (CRS) in LTE. The NRS may indicate the NB cell identifier (NCellID), while the LTE CRS may indicate the physical cell identifier (PCI). For in-band deployments, the LTE CRS may also be transmitted in subframes not used for MBSFN, such as Figure 2A and 2B Although the structures of NRS and LTE CRS may not overlap, CRS may be taken into account for rate matching and RE mapping purposes. DL transmissions may not use REs allocated for NRS and / or LTE CRS.

[0048] For initial synchronization and to determine the NCellID, the NB primary synchronization signal (NPSS) may be transmitted in subframe 5 of even and odd radio frames, and the NB secondary synchronization signal (NSSS) may be transmitted in subframe 9 of even radio frames. Using in-band deployment, the first three OFDM symbols in each of subframe 5 and subframe 9 may carry the LTE physical downlink control channel (PDCCH), and thus the first three OFDM symbols in subframes 5 and 9 may not carry NPSS and NSSS, as shown in FIG. Figure 2A and 2B As explained in . In in-band deployment, NPSS and NSSS may be punctured by LTE CRS. Using guard band deployment and / or stand-alone deployment, the first three OFDM symbols in each of subframe 5 and subframe 9 may be unused, and thus the first three OFDM symbols in subframes 5 and 9 may not carry NPSS and NSSS, such as Figure 2C and 2D As explained in .

[0049] The NB Physical Broadcast Channel (NPBCH) may carry the NB Master Information Block (NB-MIB). After physical layer baseband processing, the resulting NB-MIB may be split into eight blocks. The first block may be transmitted in subframe 0 of each radio frame in a set of eight consecutive radio frames. The second block may be transmitted in subframe 0 of each radio frame in a subsequent set of eight consecutive radio frames. Processing of NB-MIB block transmissions may continue until the entire NB-MIB is transmitted. By using subframe 0 for all NB-MIB block transmissions, conflicts between NPBCH and potential LTE MBSFN transmissions may be avoided when in-band deployment of NB-IoT is used. Figure 2A and 2B As explained in , for in-band deployment, NPBCH symbols can be mapped around NRS and LTE CRS. Figure 2C and 2D As illustrated in , for guard band deployment and / or standalone deployment, the NPBCH may occupy all but the unused first three symbols in subframe 0.

[0050] The principles of control channels and shared channels also apply to NB-IoT, defining the NB physical downlink control channel (NPDCCH) and the NB physical downlink shared channel (NPDSCH). Not all subframes can be used for the transmission of dedicated DL channels. In the RRC signaling, the UE may be signaled to indicate the bitmap of valid subframes for NPDCCH and / or NPDSCH. When a subframe is not indicated as valid, the NPDCCH and / or NPDSCH may be postponed until the next valid subframe. The NPDCCH may indicate which UEs have data located in the NPDSCH, where to find the data, and how often the data is repeated. The UL grant indicating the REs allocated to the UE for UL data transmission (all) may also be located in the NPDCCH. The NPDCCH may also carry paging and / or system information updates. The NPDCCH symbols and NPDSCH symbols may be mapped around the NRS, and for in-band deployments of NB-IoT, may also be mapped around the LTE CRS.

[0051] Figure 3 3 is a block diagram of a base station 310 in communication with a UE 350 in an access network. In the DL, IP packets from the EPC 160 may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a media access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration of UE measurement reports; PDCP layer functionality associated with header compression / decompression, security (ciphering, cipher decryption, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with delivery of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0052] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1, including the physical (PHY) layer, may include error detection on the transport channel, forward error correction (FEC) encoding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and / or frequency domain, and then combined together using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine coding and modulation schemes and for spatial processing. The channel estimates may be derived from a reference signal and / or channel condition feedback transmitted by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0053] At the UE 350, each receiver 354RX receives a signal through its corresponding antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial stream destined for the UE 350. If there are multiple spatial streams destined for the UE 350, they can be combined into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then transforms the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, as well as the reference signal, are recovered and demodulated by determining the signal constellation point most likely transmitted by the base station 310. These soft decisions can be based on the channel estimates calculated by the channel estimator 358. These soft decisions are then decoded and deinterleaved to recover the data and control signals originally transmitted on the physical channel by the base station 310. These data and control signals are then provided to the controller / processor 359 which implements layer 3 and layer 2 functionality.

[0054] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport channels and logical channels, packet reassembly, cipher interpretation, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0055] Similar to the functionality described in conjunction with DL transmissions performed by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functionality associated with header compression / decompression, and security (encryption, decryption, integrity protection, integrity verification); RLC layer functionality associated with delivery of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing MAC SDUs onto TBs, demultiplexing MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0056] Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by a TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0057] UL transmissions are processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318RX receives a signal through its respective antenna 320. Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to a RX processor 370.

[0058] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport channels and logical channels, packet reassembly, cipher decoding, header decompression, control signal processing to recover IP packets from the UE 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0059] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to Figure 1 199 combined aspects.

[0060] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform operations related to Figure 1 198 combined aspects.

[0061] In wireless communication, base stations and UEs send different notification and paging signals to each other to facilitate communication. These signals can help improve overall communication system information, as well as improve access and control of each device within the wireless system. In some instances, a WUS can be sent from a base station to a UE operating in DRX to provide notification of an upcoming PO. When multiple WUS and PO are sent and received, saving wireless resources and battery usage can be beneficial due to the number of WUS and PO used in the entire wireless system. By doing so, the overall power consumption of the wireless device can be improved. However, some UEs (such as NB-IoT devices) may experience problems with paging reception due to signal fading. Idle mode paging reception of NB-IoT devices may be limited by deep fading, and as such, the network may schedule a large number of WUS and / or paging repetitions in order to enable NB-IoT devices to have reliable paging.

[0062] Narrowband communication involves communicating using a limited frequency bandwidth compared to the frequency bandwidth used for LTE communications. An example of narrowband communication is NB-IoT communication, which is limited to a single RB of the system bandwidth, e.g., 180kHz. Idle mode paging reception for NB-IoT devices can be problematic in fading scenarios. For example, Figure 4 The diagram 400 of provides an example distribution of a single path fading channel. The NB channel may be a single tap channel in nature and may lack frequency diversity. Typical NB applications may be low Doppler scenarios and time diversity may also be limited to within the DRX cycle.

[0063] Figure 4The distribution of instantaneous fading shown in the diagram 400 of can be a cumulative distribution function of the instantaneous fading gain. A system designed to handle 1% of outages means that the network will need to account for up to -25dB of instantaneous fading. The current 3GPP specification requires a 1% narrowband physical downlink control channel (NPDCCH) drop probability, and designing such a system may consume an increased amount of UE and / or network resources. For example, the UE will need to receive a large number of repetitions, and the network will need to transmit a large number of repetitions, which can cause stress on the network and the UE. The UE may also experience increased power consumption due to receiving a large number of repetitions, which may result in a shortened battery life. However, a system configured to handle increased outages may not have to account for up to -25dB of sharp instantaneous attenuation. For example, a system with a 10% outage will need to be able to account for up to -10dB of instantaneous fading, which is up to 15dB different from a system with a 1% outage. Therefore, a system with an outage rate that can be configured to change it can result in improved paging performance for NB-IoT devices.

[0064] A network that can adjust or configure the network's interruption rate or target loss rate for paging NPDCCH can improve paging performance for NB-IoT devices. For example, the network may be configured to notify or broadcast the target loss rate that the network expects the UE to perform. In this way, the UE may be able to utilize the target loss rate notified or transmitted by the network and optimize the paging performance that can reduce its power consumption. Based on the notified target loss rate, the UE may be able to optimize and / or reduce the number of WUS receptions that need to be monitored in each DRX cycle. This can result in power savings for the UE. Additionally, the UE may be able to experience early termination of the paging CSS based on the target loss rate. In some instances, having an increased target loss rate (e.g., 10%) may allow the UE to receive for a shorter time duration compared to a target loss rate of 1%. Receiving a smaller or reduced set of repetitions in a shorter time duration may allow the UE to have a reduced active or DRX on time period.

[0065] For example, refer to Figure 5, diagram 500 includes an example of a DRX cycle having a DRX period of N and a WUS 502. WUS 502 is an active time or DRX on time in which a UE can be activated to receive data. Diagram 500 also includes another DRX cycle having a DRX period of N / 2 and a WUS 504. The DRX cycle with WUS 504 may correspond to a network that changes its target loss rate, for example, from 1% to 10%, while the DRX cycle with WUS 502 has a target loss rate of 1%. The UE can efficiently achieve the same 1% reliability in a network with a 10% target loss rate by halving the DRX cycle of the network. Therefore, for example, by adjusting the target loss rate to 10% and repeating paging across two DRX cycles, the UE may be able to achieve the same 1% target loss rate as the DRX cycle with WUS 502 and have the same waiting time.

[0066] Figure 6 is a call flow diagram of signaling between a UE and a base station according to certain aspects of the present disclosure. Figure 6 The diagram 600 includes a UE 602 and a base station 604. The base station 604 may be configured to provide a cellular cell. The UE 602 may be a NB-IoT device configured to communicate with the base station 604. For example, in Figure 1 In the context of , base station 604 may correspond to base station 102 / 180, and accordingly, a cellular cell may include a geographic coverage area 110 in which communication coverage is provided and / or a small cellular cell 102' having a coverage area 110'. Further, UE 602 may correspond to at least UE 104. In another example, in Figure 3 In the context of , base station 604 may correspond to base station 310, and UE 602 may correspond to UE 350. Optional aspects are illustrated with dashed lines.

[0067] In some aspects, the UE 602 may be configured to operate with reduced or relaxed paging performance in an effort to improve paging reception of a narrowband control channel (e.g., NPDCCH). The UE 602 may be configured to provide an indication of its capabilities to the base station 604. As such, in some aspects, the UE may transmit a reduce paging indication 606 to the base station 604. The reduce paging indication 606 may include the capabilities of the UE 602 to support reduced paging. The reduce paging indication may correspond to at least one coverage enhancement (CE) level.

[0068] In some aspects, for example, at 608, the base station 604 may be configured to determine a target loss rate for paging on a downlink narrowband control channel. The base station 604 may receive a reduced paging indication 606 from the UE 602 indicating that the UE supports reduced paging. In some aspects, the base station may receive a paging record 607 from the network (not shown) indicating that the UE is in a reduced paging mode. The base station 604 may adjust the target loss rate in response to receiving the paging record from the network. In some aspects, the base station may determine the target loss rate based on the reduced paging indication. In some aspects, the target loss rate may be selected from a target loss rate set. An example target loss rate set may include 1%, 10%, and / or 20%. However, the target loss rate set may include additional target loss rates that may be greater than or less than the examples provided herein, and the present disclosure is not intended to be limited to the aspects disclosed herein.

[0069] For example, at 610, the base station can be configured to determine a paging repetition number for the UE. In some aspects, the paging repetition number can be based on a reduce paging indication, while in other aspects, the paging repetition number can be based on a target loss rate.

[0070] For example, at 612, the base station can be configured to configure a reduction in downlink narrowband control channel repetitions based on at least one of reducing paging indications and a target loss rate.

[0071] For example, the base station may be configured to configure a non-uniform distribution of paging occasions at 614. In some aspects, the base station may transmit paging transmissions to the UEs during the DRX cycle based on the non-uniform distribution of paging occasions.

[0072] For example, at 616, the base station may transmit an indication of the target loss rate to at least UE 602. In some aspects, the base station may transmit an indication of the target loss rate to one or more UEs. The UE receives an indication of the target loss rate for the downlink narrowband control channel from the base station. In some aspects, the indication of the target loss rate may be transmitted in system information (e.g., 620) from the base station.

[0073] In some aspects, for example, at 618, the base station may be configured to adjust the DRX configuration for one or more UEs based on the target loss rate. For example, to adjust the DRX configuration, the base station may reduce the number of DRX on periods. In some aspects, the base station may reduce paging monitoring on the downlink narrowband control channel in order to adjust the DRX configuration. The adjusted DRX configuration may be transmitted to the base station in system information 620 (which may also include additional configurations).

[0074] The UE receives the target loss rate in an indication 616 of the target loss rate and / or in system information 620. In some aspects, an indication of the target loss rate may be received in a configuration for the UE. At 624, the UE may be configured to adjust some of its settings in response to receiving an indication of the target loss rate, such as but not limited to adjusting the DRX configuration. For example, the UE may adjust the DRX cycle based on the target loss rate for the narrowband downlink control channel. In some aspects, the UE may adjust the number of WUS monitoring opportunities based on the target loss rate. In such aspects, the UE may reduce the number of DRX on periods or reduce paging monitoring for downlink narrowband control channels in order to adjust the WUS monitoring opportunities. In some aspects, the UE may receive a reduction in repetition of downlink narrowband control channels from a base station based on the target loss rate. The UE may further receive a configuration for a non-uniform distribution of paging opportunities from the base station, which may correspond to the target loss rate. For example, at 622, the UE may be configured to monitor paging during a non-uniform distribution of paging opportunities. In some aspects, the UE may be configured to terminate monitoring of a paging common search space (CSS) early based on a target loss rate.

[0075] Figure 7 700 is a flow chart of a wireless communication method. The method may be performed by a base station or a component of a base station (e.g., base station 102 / 180, 604; device 802; baseband unit 804, which may include memory 376 and which may be the entire base station 310 or a component of the base station 310 (such as TX processor 316, RX processor 370 and / or controller / processor 375)). One or more of the operations illustrated may be omitted, transposed, or performed simultaneously. Optional aspects are illustrated with dashed lines. The method may enable the base station to adjust the error rate regarding paging and notify the UE of such error rate in order to optimize or reduce network paging resources.

[0076] In some aspects, for example, at 702, a base station may receive a reduced paging indication. For example, 702 may be performed by a receiving component 830 of the device 802. The reduced paging indication may indicate that the UE supports reduced paging. In some aspects, the base station may receive a paging record from the network indicating that the UE is in a reduced paging mode. The base station may adjust the target loss rate in response to receiving the paging record from the network. In some aspects, the base station may receive an indication from the UE notifying the base station of the UE's support for reduced paging.

[0077] At 704, the base station may determine a target loss rate for paging on a downlink narrowband control channel. For example, 704 may be performed by a target loss rate component 840 of the device 802. In some aspects, the target loss rate may be determined based on a reduced paging indication. In some aspects, the target loss rate may be selected from a set of target loss rates. For example, the set of target loss rates may include 1%, 10%, or 20%. The set of target loss rates may include other values ​​that may be greater than or less than any of the example target loss rates disclosed herein, so that the present disclosure is not intended to be limited to the sample target loss rates included herein.

[0078] In some aspects, for example, at 706, the base station may determine a number of paging repetitions for the UE based on reducing at least one of the paging indication or the target loss rate. For example, 706 may be performed by the paging component 842 of the device 802. In some aspects, the base station may be configured to adjust Rmax based on the target loss rate. For example, for a UE with a target loss rate of 1%, Rmax may be set to 128, while for a UE with a target loss rate of 10%, Rmax may be set to 16. Rmax may be set to other values ​​at various target loss rates and is not intended to be limited to the aspects disclosed herein.

[0079] In some aspects, for example, at 708, the base station may configure a reduction in repetitions of a downlink narrowband control channel. For example, 708 may be performed by a repetition component 844 of the device 802. The base station may configure the reduction in repetitions of the downlink narrowband control channel based on at least one of reducing a paging indication and a target loss rate. In some aspects, the base station may be configured to set a number of repetitions when the UE is paged.

[0080] In some aspects, for example, at 710, the base station may configure a non-uniform distribution of paging occasions. For example, 710 may be performed by the non-uniform distribution component 846 of the device 802. In some aspects, in order to obtain similar performance, the UE may be configured with a smaller DRX cycle and a larger BLER, for example, instead of a 2.56 second DRX cycle at 1% BLER, the UE may be configured to have a 1.28 second DRX cycle at 10% BLER. In some aspects, for example, for a larger DRX cycle, the UE may be configured to have a non-uniform distribution of monitored paging occasions. For example, for a 10.24 second DRX cycle, instead of configuring the UE with a 5.12 second DRX cycle, the UE may be configured with a 10.24 second DRX cycle plus a subsequent retransmission paging occasion of 1.28 seconds. At least one advantage is that the UE can enter deep sleep for a longer period of time while achieving the same performance. The non-uniform distribution of paging occasions can allow the network to achieve the same target loss rate and waiting time while reducing the use of network resources. In some aspects, the network can achieve the same target loss rate by repeating the NPDCCH on two DRX cycles. In some aspects, the network may achieve the same latency by halving the DRX cycle.

[0081] In some aspects, for example, at 712, the base station may transmit a paging transmission to the UE during the DRX cycle. For example, 712 may be performed by the paging transmission component 848 of the device 802. The base station may transmit a paging transmission to the UE during the DRX cycle based on a non-uniform distribution of paging occasions. The non-uniform distribution of paging occasions may allow the UE to remain in an inactive or DRX off period.

[0082] At 714, the base station may transmit an indication of the target loss rate. For example, 714 may be performed by the indication component 850 of the device 802. The base station may transmit an indication of the target loss rate to one or more UEs. In some aspects, the indication of the target loss rate may be transmitted in system information (e.g., SIB, RRC) from the base station. For example, when one or more UEs are camped on a cellular cell associated with the base station, the one or more UEs may read from the SIB whether the base station supports relaxed paging performance, which may cause the base station to transmit an indication of the target loss rate to the one or more UEs.

[0083] In some aspects, for example, at 716, the base station may adjust the DRX configuration for one or more UEs. For example, 716 may be performed by the DRX configuration component 852 of the device 802. The base station may adjust the DRX configuration for one or more UEs based on the target loss rate. In some aspects, the period of the DRX configuration may be reduced based on the target loss rate. The network may achieve the same target loss rate by repeating the NB downlink control channel on more than one DRX cycle.

[0084] In some aspects, for example, at 718, the base station may reduce the number of DRX on periods. For example, 718 may be performed by the reducing component 854 of the device 802. The base station may reduce the number of DRX on periods to adjust the DRX configuration. The reduction of the DRX on period may cause the UE to drop paging when the UE is in the DRX off period. The increase in the target loss rate may allow the UE to drop such paging when it is in the DRX off period, which may result in an overall saving of DRX on time while achieving the same performance.

[0085] In some aspects, for example, at 720, the base station may reduce paging monitoring on a downlink narrowband control channel. For example, 720 may be performed by a reducing component 854 of the device 802. The base station may reduce paging monitoring on a downlink narrowband control channel to adjust the DRX configuration. In some aspects, the base station may reduce the amount of subframes used for the WUS to reduce paging monitoring.

[0086] Figure 8 800 is an example of a hardware implementation of an illustrated device 802. The device 802 is a BS and includes a baseband unit 804. The baseband unit 804 can communicate with the UE 104 via a cellular RF transceiver. The baseband unit 804 may include a computer-readable medium / memory. The baseband unit 804 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory. The software, when executed by the baseband unit 804, enables the baseband unit 804 to perform the various functions described above. The computer-readable medium / memory can also be used to store data manipulated by the baseband unit 804 when executing the software. The baseband unit 804 further includes a receiving component 830, a communication manager 832, and a transmission component 834. The communication manager 832 includes one or more of the illustrated components. The components within the communication manager 832 may be stored in a computer-readable medium / memory and / or configured as hardware within the baseband unit 804. The baseband unit 804 may be a component of the base station 310 and may include the memory 376 and / or at least one of the TX processor 316 , the RX processor 370 , and the controller / processor 375 .

[0087] The communication manager 832 includes a target loss rate component 840 that can determine a target loss rate for pages on the downlink narrowband control channel, for example, as described in conjunction with Figure 7 The communication manager 832 further includes a paging component 842, which can determine the number of paging repetitions for the UE, for example, as described in conjunction with Figure 7 The communication manager 832 further includes a repetition component 844, which can configure a reduction in downlink narrowband control channel repetitions, for example, as described in conjunction with Figure 7The communication manager 832 further includes a non-uniform distribution component 846, which can configure a non-uniform distribution of paging occasions, for example, as described in conjunction with Figure 7 The communication manager 832 further includes a paging transmission component 848, which can transmit a paging transmission to the UE during the DRX cycle, for example, as described in conjunction with Figure 7 The communication manager 832 further includes an indication component 850, which can transmit an indication of the target loss rate to one or more UEs, for example, as described in conjunction with Figure 7 The communication manager 832 further includes a DRX configuration component 852, which can adjust the DRX configuration for one or more UEs, for example, as described in conjunction with Figure 7 The communication manager 832 further includes a reducing component 854, which in some aspects can reduce the number of DRX on periods, for example, as described in conjunction with Figure 7 In some aspects, the reducing component 854 can reduce the paging monitoring on the downlink narrowband control channel, for example, as combined with Figure 7 In some aspects, the receiving component 830 can be configured to receive a reduced paging indication, for example, as described in conjunction with Figure 7 As described in 702.

[0088] The apparatus may include executing Figure 7 The additional components of each box of the algorithm in the preceding flowchart. Thus, Figure 7 Each block in the aforementioned flow chart of can be performed by a component and the device may include one or more of those components. These components can be one or more hardware components specially configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0089] In one configuration, the device 802, in particular the baseband unit 804, includes means for determining a target loss rate for paging on a downlink narrowband control channel. The device includes means for transmitting an indication of the target loss rate to one or more UEs. The device further includes means for adjusting the DRX configuration for one or more UEs based on the target loss rate. The device further includes means for reducing the number of DRX on periods. The device further includes means for reducing paging monitoring on a downlink narrowband control channel. The device further includes means for receiving a reduced paging indication, wherein the reduced paging indication indicates that the UE supports reduced paging. The device further includes means for determining the number of paging repetitions for the UE based on at least one of the reduced paging indication or the target loss rate. The device further includes means for configuring a reduction in the repetition of a downlink narrowband control channel based on at least one of the reduced paging indication and the target loss rate. The device further includes means for configuring a non-uniform distribution of paging occasions. The device further includes means for transmitting paging transmissions to the UE during a DRX cycle based on the non-uniform distribution of paging occasions. The aforementioned means may be one or more of the aforementioned components in the device 802' configured to perform the functions recited by the aforementioned means. As described above, the device 802 may include the TX processor 316, the RX processor 370, and the controller / processor 375. Thus, in one configuration, the aforementioned means may be the TX processor 316, the RX processor 370, and the controller / processor 375 configured to perform the functions recited by the aforementioned means.

[0090] Fig. 9 900 is a flow chart of a wireless communication method. The method may be performed by a UE or a component of a UE (e.g., UE 104, 602; device 1002; cellular baseband processor 1004, which may include memory 360 and may be the entire UE 350 or a component of UE 350 (such as TX processor 368, RX processor 356 and / or controller / processor 359)). One or more of the illustrated operations may be omitted, transposed, or performed simultaneously. Optional aspects are illustrated with dashed lines. The method may allow the UE to reduce power consumption by reducing the number of network pages monitored in a DRX cycle.

[0091] In some aspects, for example, at 902, the UE may transmit a reduced paging indication to the base station. For example, 902 may be performed by a reduced paging component 1040 of the device 1002. In some aspects, the reduced paging indication may include a capability that the UE is configured to support reduced paging. The reduced paging indication may correspond to at least one coverage enhancement (CE) level. For example, a target loss rate may be selectively defined for each coverage level of the UE.

[0092] At 904, the UE may receive an indication of a target loss rate for a downlink narrowband control channel. For example, 904 may be performed by a target loss rate component 1042 of the device 1002. The UE may receive an indication of a target loss rate for a downlink narrowband control channel from a base station. In some aspects, the UE may be configured to terminate monitoring of a paging common search space (CSS) in advance based on the target loss rate. In some aspects, an indication of the target loss rate may be received in system information from a base station. In some aspects, an indication of the target loss rate may be received in a configuration for the UE.

[0093] In some aspects, for example, at 906, the UE may receive a reduction in downlink narrowband control channel repetitions from the base station. For example, 906 may be performed by the repetition component 1044 of the device 1002. The reduction in downlink narrowband control channel repetitions may be based on a target loss rate. In some aspects, the base station may be configured to set the number of repetitions when the UE is paged.

[0094] In some aspects, for example, at 908, the UE may receive a configuration for a non-uniform distribution of paging occasions. For example, 908 may be performed by a configuration component 1046 of the device 1002. The UE may receive a configuration for a non-uniform distribution of paging occasions from a base station. The configuration for the non-uniform distribution of paging occasions may correspond to a target loss rate. The non-uniform distribution of paging occasions may allow the UE to achieve the same target loss rate and latency while reducing power consumption of the UE.

[0095] In some aspects, for example, at 910, the UE may monitor paging during a non-uniform distribution of paging occasions. For example, 910 may be performed by the monitoring component 1048 of the device 1002. The non-uniform distribution of paging occasions may allow the UE to stay within or extend the time that the UE is in an inactive or DRX off period.

[0096] At 912, the UE may adjust the DRX cycle based on the target loss rate for the narrowband downlink control channel. For example, 912 may be performed by the DRX cycle component 1050 of the device 1002. In some aspects, the period of the DRX configuration may be reduced based on the target loss rate. In some aspects, in order to obtain similar performance, the UE may be configured with a smaller DRX cycle and a larger BLER, for example, instead of a 2.56 second DRX cycle at 1% BLER, the UE may be configured to have a 1.28 second DRX cycle at 10% BLER.

[0097] In some aspects, for example, the UE may adjust the number of wake-up signal (WUS) monitoring opportunities based on the target loss rate at 914. For example, 914 may be performed by the WUS component 1052 of the device 1002. In some aspects, the WUS monitoring opportunities may be reduced by reducing the amount of subframes used for the WUS.

[0098] In some aspects, for example, at 916, the UE may reduce the number of DRX on periods in some aspects. For example, 916 may be performed by the reducing component 1054 of the device 1002. In some aspects, the UE may reduce the number of DRX on periods in order to adjust the number of WUS monitoring opportunities. The reduction of the DRX on period may cause the UE to drop paging when the UE is in the DRX off period. The increase in the target loss rate may allow the UE to drop such paging when it is in the DRX off period, which may result in an overall saving of DRX on time while achieving the same performance.

[0099] In some aspects, for example, at 918, the UE may reduce paging monitoring for a downlink narrowband control channel in some aspects. For example, 918 may be performed by a reduction component 1054 of the device 1002. In some aspects, the UE may reduce paging monitoring for a downlink narrowband control channel in order to adjust the number of WUS monitoring opportunities. In some aspects, paging monitoring for a downlink narrowband control channel may be reduced by reducing the amount of subframes used for the WUS.

[0100] Fig.101 is a diagram 1000 illustrating an example of a hardware implementation of a device 1002. The device 1002 is a UE and includes a cellular baseband processor 1004 (also referred to as a modem) coupled to a cellular RF transceiver 1022 and one or more subscriber identity modules (SIM) cards 1020, an application processor 1006 coupled to a secure digital (SD) card 1008 and a screen 1010, a Bluetooth module 1012, a wireless local area network (WLAN) module 1014, a global positioning system (GPS) module 1016, and a power supply 1018. The cellular baseband processor 1004 communicates with the UE 104 and / or the BS 102 / 180 through the cellular RF transceiver 1022. The cellular baseband processor 1004 may include a computer-readable medium / memory. The cellular baseband processor 1004 is responsible for general processing, including the execution of software stored on a computer-readable medium / memory. The software, when executed by the cellular baseband processor 1004, causes the cellular baseband processor 1004 to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the cellular baseband processor 1004 when executing software. The cellular baseband processor 1004 further includes a receiving component 1030, a communication manager 1032, and a transmission component 1034. The communication manager 1032 includes one or more of the illustrated components. The components within the communication manager 1032 may be stored in a computer-readable medium / memory and / or configured as hardware within the cellular baseband processor 1004. The cellular baseband processor 1004 may be a component of the UE 350 and may include a memory 360 and / or at least one of the following: a TX processor 368, an RX processor 356, and a controller / processor 359. In one configuration, the device 1002 may be a modem chip and include only the baseband processor 1004, and in another configuration, the device 1002 may be the entire UE (e.g., see Figure 3 350) and includes the aforementioned additional modules of device 1002.

[0101] The communication manager 1032 includes a reduce paging component 1040, which can be configured to transmit a reduce paging indication to a base station, for example, as combined with Fig. 9 902 as described. The communication manager 1032 further includes a target loss rate component 1042, which can be configured to receive an indication of a target loss rate for a downlink narrowband control channel, for example, as described in conjunction with Fig. 9 904. The communication manager 1032 further includes a repetition component 1044, which can be configured to receive a reduction in downlink narrowband control channel repetitions based on a target loss rate, for example, as combined Fig.10The communication manager 1032 further includes a configuration component 1046, which can be configured to receive a configuration for a non-uniform distribution of paging occasions corresponding to a target loss rate, for example, as described in conjunction with Fig. 9 908. The communication manager 1032 further includes a monitoring component 1048, which can be configured to monitor paging during a non-uniform distribution of paging occasions, for example, as described in conjunction with Fig. 9 The communication manager 1032 further includes a DRX cycle component 1050, which can be configured to adjust the DRX cycle based on a target loss rate for the narrowband downlink control channel, for example, as described in conjunction with Fig. 9 The communication manager 1032 further includes a WUS component 1052, which can be configured to adjust the number of WUS monitoring opportunities based on the target loss rate, for example, as combined with Fig. 9 914. The communication manager 1032 further includes a reducing component 1054, which in some aspects can be configured to reduce the number of DRX on periods, for example, as combined Fig. 9 In some aspects, the reducing component 1054 can be configured to reduce the paging occasions for the downlink narrowband control channel, for example, as combined with Fig. 9 The 918 described.

[0102] The apparatus may include executing Fig. 9 The additional components of each box of the algorithm in the preceding flowchart. Thus, Fig. 9 Each block in the aforementioned flow chart of can be performed by a component and the device may include one or more of those components. These components can be one or more hardware components specially configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0103] In one configuration, the device 1002, in particular the cellular baseband processor 1004, includes a device for receiving an indication of a target loss rate for a downlink narrowband control channel from a base station. The device includes a device for adjusting the DRX cycle based on the target loss rate for the narrowband downlink control channel. The device further includes a device for adjusting the number of WUS monitoring opportunities based on the target loss rate. The device further includes a device for reducing the number of DRX on periods. The device further includes a device for reducing paging monitoring for downlink narrowband control channels. The device further includes a device for transmitting a reduced paging indication to the base station, wherein the reduced paging indication includes the ability of the UE to support reduced paging. The device further includes a device for receiving a reduction in downlink narrowband control channel repetitions from the base station based on the target loss rate. The device further includes a device for receiving a configuration for a non-uniform distribution of paging opportunities corresponding to the target loss rate from the base station. The device further includes a device for monitoring paging during the non-uniform distribution of paging opportunities. The aforementioned means may be one or more of the aforementioned components in the device 1002 configured to perform the functions recited by the aforementioned means. As described above, the device 1002 may include the TX processor 368, the RX processor 356, and the controller / processor 359. Thus, in one configuration, the aforementioned means may be the TX processor 368, the RX processor 356, and the controller / processor 359 configured to perform the functions recited by the aforementioned means.

[0104] It should be understood that the specific order or hierarchy of each box in the disclosed process / flowchart is an illustration of an example approach. It should be understood that the specific order or hierarchy of each box in these process / flowcharts can be rearranged based on design preferences. In addition, some boxes can be combined or omitted. The attached method claims present the elements of various boxes in an exemplary order and are not meant to be limited to the specific order or hierarchy presented.

[0105] The following examples are merely illustrative and may be combined with aspects of other embodiments or teachings described herein without limitation.

[0106] Example 1 is a method of wireless communications at a base station, comprising: determining a target loss rate for pages on a downlink narrowband control channel; and transmitting an indication of the target loss rate to one or more UEs.

[0107] In Example 2, the method of Example 1 further includes: the target loss rate is selected from a target loss rate set.

[0108] In Example 3, the method of Example 1 or 2 further includes: adjusting a discontinuous reception (DRX) configuration for the one or more UEs based on the target loss rate.

[0109] In Example 4, the method of any one of Examples 1-3 further includes: reducing the number of DRX on periods; or reducing paging monitoring on a downlink narrowband control channel.

[0110] In Example 5, the method of any one of Examples 1-4 further includes receiving a reduce paging indication, wherein the reduce paging indication indicates that the UE supports reduced paging, and wherein the target loss rate is determined based on the reduce paging indication.

[0111] In Example 6, the method of any one of Examples 1-5 further includes: the reduce paging indication includes a paging record for the UE received from the network.

[0112] In Example 7, the method of any one of Examples 1-6 further includes determining a number of paging repetitions for the UE based on at least one of the reduce paging indication or the target loss rate.

[0113] In Example 8, the method of any one of Examples 1-7 further comprises configuring a reduction in downlink narrowband control channel repetition based on at least one of the reduce paging indication or the target loss rate.

[0114] In Example 9, the method of any one of Examples 1-8 further includes: configuring a non-uniform distribution of paging occasions; and transmitting a paging transmission to the UE during a DRX cycle based on the non-uniform distribution of the paging occasions.

[0115] In Example 10, the method of any one of Examples 1-9 further includes: the indication is transmitted in system information from the base station.

[0116] Example 11 is a device comprising one or more processors and one or more memories in electronic communication with the one or more processors, the one or more memories storing instructions executable by the one or more processors to cause a system or device to implement a method as in any of Examples 1-10.

[0117] Example 12 is a system or apparatus comprising means for implementing a method as in any one of Examples 1-10 or implementing an apparatus as in any one of Examples 1-10.

[0118] Example 19 is a non-transitory computer-readable medium storing instructions executable by one or more processors, the instructions causing the one or more processors to implement the method as in any of Examples 1-10.

[0119] Example 20 is a method of wireless communication at a user equipment (UE), comprising: receiving an indication of a target loss rate for a downlink narrowband control channel from a base station; and adjusting a DRX cycle based on the target loss rate for the downlink narrowband control channel.

[0120] In Example 21, the method of Example 20 further comprises: adjusting the number of WUS monitoring opportunities based on the target loss rate.

[0121] In Example 22, the method of Example 20 or 21 further includes: reducing the number of DRX on periods; or reducing paging monitoring for the downlink narrowband control channel.

[0122] In Example 23, the method of any one of Examples 20-22 further comprises: the UE prematurely terminating monitoring the paging CSS based on the target loss rate. .

[0123] In Example 24, the method of any one of Examples 20-23 further includes transmitting a reduce paging indication to the base station, wherein the reduce paging indication includes a capability of the UE to support reduced paging.

[0124] In Example 25, the method of any one of Examples 20-24 further comprises: an indication of the target loss rate is received in a configuration for the UE, and wherein the reduce paging indication corresponds to at least one CE level.

[0125] In Example 26, the method of any one of Examples 20-25 further comprises: the indication of the target loss rate is received in system information from the base station.

[0126] In Example 27, the method of any one of Examples 20-26 further comprises: receiving a reduction in downlink narrowband control channel repetitions from the base station based on the target loss rate.

[0127] In Example 28, the method of any one of Examples 20-27 further includes: receiving, from the base station, a configuration for a non-uniform distribution of paging occasions corresponding to the target loss rate; and monitoring paging during the non-uniform distribution of the paging occasions.

[0128] Example 29 is a device comprising one or more processors and one or more memories in electronic communication with the one or more processors, the one or more memories storing instructions executable by the one or more processors to cause a system or device to implement a method as in any of Examples 20-28.

[0129] Example 30 is a system or apparatus comprising means for implementing a method as in any one of Examples 20-28 or implementing an apparatus as in any one of Examples 20-28.

[0130] Example 31 is a non-transitory computer-readable medium storing instructions executable by one or more processors, the instructions causing the one or more processors to implement the method as in any of Examples 20-28.

[0131] 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 easily understood by those skilled in the art, and the universal principles defined in this article can be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown in this article, but should be granted the full scope consistent with the claims in language, wherein the singular reference of the elements is not intended to represent "there is and only one", but "one or more", unless otherwise stated. Terms such as "if", "when..." and "when..." should be interpreted as meaning "under the condition", rather than implying a direct time relationship or reaction. That is, these phrases (e.g., "when...") do not imply an immediate action in response to the occurrence of an action or during the occurrence of an action, but only imply that an action will occur when the condition is met, and no specific or immediate time constraints are required for the action to occur. The wording "exemplary" is used herein to mean "used as an example, instance or explanation". Any aspect described as "exemplary" herein need not be interpreted as being superior to or superior to other aspects. Unless otherwise stated, the term "some / certain" refers to one or more. Combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B and C," "one or more 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 multiple A, multiple B, or multiple C. Specifically, combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof" may be only A, only B, only C, A and B, A and C, B and C, or A and B and C, wherein any such combination may include one or more members of A, B, or C. All structural and functional equivalents of the elements of the various aspects described throughout the present disclosure that are currently or hereafter known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is expressly recited in the claims. The terms “module,” “mechanism,” “element,” “device,” etc. may not be replacements for the term “means.” Thus, no claim element should be construed as means-plus-function unless the element is explicitly recited using the phrase “means for.”

Claims

1. A method for wireless communication at a network entity, comprising: determining a target loss rate for pages on a downlink narrowband control channel, the target loss rate corresponding to a rate at which a user equipment (UE) is allowed to miss a number of pages during at least a portion of a discontinuous reception (DRX) cycle; as well as A configuration indicating the target loss rate is transmitted to one or more UEs, wherein the target loss rate is transmitted in system information or a dedicated downlink channel. The method of claim 1 , wherein the target loss rate is selected from a set of target loss rates.

3. The method of claim 1, further comprising: A DRX configuration for the one or more UEs is adjusted based on the target loss rate.

4. The method of claim 3, wherein adjusting the DRX configuration comprises configuring the one or more UEs to: Reduce the number of DRX on periods; or Paging monitoring on the downlink narrowband control channel is reduced.

5. The method of claim 1, further comprising: receiving a reduce paging indication, wherein the reduce paging indication indicates that the UE supports reduced paging, and The target loss rate is determined based on the reduce paging indication.

6. The method of claim 5, receiving a paging record from a network indicating that the UE is in a reduced paging mode, wherein the network entity adjusts the target loss rate in response to receiving the paging record.

7. The method of claim 5, further comprising: A number of paging repetitions for the UE is determined based on at least one of the reduce paging indication or the target loss rate.

8. The method of claim 5, further comprising: A reduction in downlink narrowband control channel repetitions is configured based on at least one of the reduce paging indication and the target loss rate.

9. The method of claim 5, further comprising: Configure non-uniform distribution of paging occasions; as well as A paging transmission is transmitted to the UE during a DRX cycle based on the non-uniform distribution of the paging occasions.

10. An apparatus for wireless communication at a network entity, comprising: Memory; as well as at least one processor coupled to the memory and configured to: determining a target loss rate for pages on a downlink narrowband control channel, the target loss rate corresponding to a rate at which a user equipment (UE) is allowed to miss a number of pages during at least a portion of a discontinuous reception (DRX) cycle; as well as A configuration indicating the target loss rate is transmitted to one or more UEs, wherein the target loss rate is transmitted in system information or a dedicated downlink channel. The apparatus of claim 10 , wherein the target loss rate is selected from a set of target loss rates.

12. The apparatus of claim 10, wherein the at least one processor is further configured to: A DRX configuration for the one or more UEs is adjusted based on the target loss rate.

13. The apparatus of claim 12, wherein to adjust the DRX configuration, the at least one processor is further configured to: Reducing the number of DRX on periods; or Paging monitoring on the downlink narrowband control channel is reduced.

14. The apparatus of claim 10, wherein the at least one processor is further configured to: receiving a reduce paging indication, wherein the reduce paging indication indicates that the UE supports reduced paging, and The target loss rate is determined based on the reduce paging indication.

15. The apparatus of claim 14, the at least one processor further configured to receive a paging record from a network indicating that the UE is in a reduced paging mode, wherein the at least one processor adjusts the target loss rate in response to receiving the paging record.

16. The apparatus of claim 14, wherein the at least one processor is further configured to: A number of paging repetitions for the UE is determined based on at least one of the reduce paging indication or the target loss rate.

17. The apparatus of claim 14, wherein the at least one processor is further configured to: A reduction in downlink narrowband control channel repetitions is configured based on at least one of the reduce paging indication and the target loss rate.

18. The apparatus of claim 14, wherein the at least one processor is further configured to: configuring a non-uniform distribution of paging occasions; and A paging transmission is transmitted to the UE during a DRX cycle based on the non-uniform distribution of the paging occasions.

19. A method of wireless communication at a user equipment (UE), comprising: receiving, from a network entity, a configuration indicating a target loss rate for a downlink narrowband control channel, the target loss rate corresponding to a rate at which the UE is allowed to miss a number of pages during at least a portion of a discontinuous reception (DRX) cycle; as well as A number of wake-up signal (WUS) monitoring opportunities in the DRX cycle is adjusted based on the target loss rate for the downlink narrowband control channel.

20. The method of claim 19, wherein adjusting the number of WUS monitoring opportunities comprises: reducing the number of DRX on periods in the DRX cycle; or Paging monitoring of the downlink narrowband control channel is reduced.

21. The method of claim 19, wherein the UE prematurely terminates monitoring a paging common search space (CSS) based on the target loss rate.

22. The method of claim 19, further comprising: A reduce paging indication is transmitted to the network entity, wherein the reduce paging indication includes a capability of the UE to support reduced paging.

23. The method of claim 22, wherein the reduce paging indication corresponds to at least one coverage enhancement (CE) level.

24. The method of claim 19, wherein the target loss rate is received in system information from the network entity.

25. The method of claim 19, further comprising: A reduction in downlink narrowband control channel repetitions is received from the network entity based on the target loss rate.

26. The method of claim 19, further comprising: receiving, from the network entity, a configuration for a non-uniform distribution of paging occasions corresponding to the target loss rate; as well as Paging is monitored during the non-uniform distribution of the paging occasions.

27. An apparatus for wireless communication at a user equipment (UE), comprising: Transceiver; at least one processor; as well as a memory coupled to the transceiver and the at least one processor, the memory having instructions stored thereon that, when executed by the at least one processor, cause the apparatus to: receiving, via the transceiver, from a network entity a configuration indicating a target loss rate for a downlink narrowband control channel, the target loss rate corresponding to a rate at which the UE is allowed to miss a number of pages during at least a portion of a discontinuous reception (DRX) cycle; as well as Adjusting the DRX based on the target loss rate for the downlink narrowband control channel The number of wake-up signal (WUS) monitoring opportunities in a cycle.

28. The apparatus of claim 27, wherein the instructions causing the apparatus to adjust the number of WUS monitoring opportunities further cause the apparatus to: reducing the number of DRX on periods in the DRX cycle; or Paging monitoring of the downlink narrowband control channel is reduced.

29. The apparatus of claim 27, wherein the UE prematurely terminates monitoring a paging common search space (CSS) based on the target loss rate.

30. The apparatus of claim 27, wherein the instructions, when executed by the at least one processor, further cause the apparatus to: A reduce paging indication is transmitted via the transceiver to the network entity, wherein the reduce paging indication includes a capability of the UE to support reduced paging, and wherein the reduce paging indication corresponds to at least one coverage enhancement (CE) level.

31. The apparatus of claim 27, wherein the target loss rate is received in system information from the network entity.

32. The apparatus of claim 27, wherein the instructions, when executed by the at least one processor, further cause the apparatus to: A reduction in downlink narrowband control channel repetitions is received from the network entity via the transceiver based on the target loss rate.

33. The apparatus of claim 27, wherein the instructions, when executed by the at least one processor, further cause the apparatus to: receiving, via the transceiver, from the network entity a configuration for a non-uniform distribution of paging occasions corresponding to the target loss rate; and Paging is monitored during the non-uniform distribution of the paging occasions.

34. A non-transitory computer readable medium storing computer executable code which, when executed by a processor, causes the processor to: receiving a configuration from a network entity indicating a target loss rate for a downlink narrowband control channel, the target loss rate corresponding to a rate at which a user equipment (UE) is allowed to miss a number of pages during at least a portion of a discontinuous reception (DRX) cycle; and A number of wake-up signal (WUS) monitoring opportunities in the DRX cycle is adjusted based on the target loss rate for the downlink narrowband control channel.

35. The non-transitory computer readable medium of claim 34, wherein the code causing the processor to adjust the number of WUS monitoring opportunities further causes the processor to: reducing the number of DRX on periods in the DRX cycle; or Paging monitoring of the downlink narrowband control channel is reduced.

36. The non-transitory computer readable medium of claim 34, wherein the code, when executed by a processor, further causes the processor to terminate monitoring of a paging common search space (CSS) early based on the target loss rate.

37. The non-transitory computer readable medium of claim 34, wherein the code, when executed by a processor, further causes the processor to: A reduce paging indication is transmitted to the network entity, wherein the reduce paging indication includes a capability of the UE to support reduced paging, wherein the reduce paging indication corresponds to at least one coverage enhancement (CE) level.

38. The non-transitory computer readable medium of claim 34, wherein the target loss rate is received in system information from the network entity.

39. The non-transitory computer readable medium of claim 34, wherein the code, when executed by a processor, further causes the processor to: A reduction in downlink narrowband control channel repetitions is received from the network entity based on the target loss rate.

40. The non-transitory computer readable medium of claim 34, wherein the code, when executed by a processor, further causes the processor to: receiving, from the network entity, a configuration for a non-uniform distribution of paging occasions corresponding to the target loss rate; and Paging is monitored during the non-uniform distribution of the paging occasions.

41. An apparatus for wireless communication at a user equipment (UE), comprising: means for receiving, from a network entity, a configuration indicating a target loss rate for a downlink narrowband control channel, the target loss rate corresponding to a rate at which the UE is allowed to miss a number of pages during at least a portion of a discontinuous reception (DRX) cycle; as well as Means for adjusting a number of wake-up signal (WUS) monitoring opportunities in the DRX cycle based on the target loss rate for the downlink narrowband control channel.

42. The apparatus of claim 41, wherein the means for adjusting the number of WUS monitoring opportunities is further configured to: reducing the number of DRX on periods in the DRX cycle; or Paging monitoring of the downlink narrowband control channel is reduced.

43. The apparatus of claim 41, further comprising: Means for early terminating monitoring of a paging common search space (CSS) based on the target loss rate.

44. The apparatus of claim 41, further comprising: means for transmitting a reduce paging indication to the network entity, wherein the reduce paging indication comprises a capability of the UE to support reduced paging, and wherein the reduce paging indication corresponds to at least one coverage enhancement (CE) level.

45. The apparatus of claim 41, wherein the target loss rate is received in system information from the network entity.

46. ​​The apparatus of claim 41, further comprising: Means for receiving, from the network entity, a reduction in downlink narrowband control channel repetitions based on the target loss rate.

47. The apparatus of claim 41, further comprising: means for receiving, from the network entity, a configuration for a non-uniform distribution of paging occasions corresponding to the target loss rate; as well as Means for monitoring for pages during the non-uniform distribution of the paging occasions.

Images