WO2020071880A1 - Amélioration d'une procédure de radiomessagerie - Google Patents

Amélioration d'une procédure de radiomessagerie

Info

Publication number
WO2020071880A1
WO2020071880A1 PCT/KR2019/013116 KR2019013116W WO2020071880A1 WO 2020071880 A1 WO2020071880 A1 WO 2020071880A1 KR 2019013116 W KR2019013116 W KR 2019013116W WO 2020071880 A1 WO2020071880 A1 WO 2020071880A1
Authority
WO
WIPO (PCT)
Prior art keywords
wireless device
pdcch monitoring
power saving
paging
monitor
Prior art date
Application number
PCT/KR2019/013116
Other languages
English (en)
Inventor
Yejee LEE
Oanyong LEE
Youngdae Lee
Original Assignee
Lg Electronics Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lg Electronics Inc. filed Critical Lg Electronics Inc.
Publication of WO2020071880A1 publication Critical patent/WO2020071880A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02—Arrangements for increasing efficiency of notification or paging channel
    • H04W68/025—Indirect paging
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave where the power saving management affects multiple terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present disclosure relates to enhancement of a paging procedure based on a power saving signal.
  • 3rd generation partnership project (3GPP) long-term evolution (LTE) is a technology for enabling high-speed packet communications.
  • 3GPP 3rd generation partnership project
  • LTE long-term evolution
  • Many schemes have been proposed for the LTE objective including those that aim to reduce user and provider costs, improve service quality, and expand and improve coverage and system capacity.
  • the 3GPP LTE requires reduced cost per bit, increased service availability, flexible use of a frequency band, a simple structure, an open interface, and adequate power consumption of a terminal as an upper-level requirement.
  • ITU international telecommunication union
  • NR new radio
  • 3GPP has to identify and develop the technology components needed for successfully standardizing the new RAT timely satisfying both the urgent market needs, and the more long-term requirements set forth by the ITU radio communication sector (ITU-R) international mobile telecommunications (IMT)-2020 process.
  • ITU-R ITU radio communication sector
  • IMT international mobile telecommunications
  • the NR should be able to use any spectrum band ranging at least up to 100 GHz that may be made available for wireless communications even in a more distant future.
  • the NR targets a single technical framework addressing all usage scenarios, requirements and deployment scenarios including enhanced mobile broadband (eMBB), massive machine-type-communications (mMTC), ultra-reliable and low latency communications (URLLC), etc.
  • eMBB enhanced mobile broadband
  • mMTC massive machine-type-communications
  • URLLC ultra-reliable and low latency communications
  • the NR shall be inherently forward compatible.
  • paging procedure should be enhanced.
  • a method for a wireless device in a wireless communication system includes monitoring a first physical downlink control channel (PDCCH) monitoring occasion in a calculated paging occasion (PO), receiving a power saving signal including information on a group identifier (ID) in the first PDCCH monitoring occasion via multiple beams, and monitoring remaining PDCCH monitoring occasions in the PO based on the group ID including an ID of the wireless device.
  • PDCCH physical downlink control channel
  • ID group identifier
  • an apparatus for implementing the above method is provided.
  • the present disclosure can have various advantageous effects.
  • a wireless device can know whether to monitor physical downlink control channel (PDCCH) monitoring occasion based on group identifier (ID) and/or beam index received in the first PDCCH monitoring occasion.
  • PDCCH physical downlink control channel
  • ID group identifier
  • the wireless device can save power consumption by not monitoring the PDCCH monitoring occasion.
  • the beam index is received in the first PDCCH monitoring occasion in a paging occasion (PO), it is not expected that best beam is changed between the first PDCCH monitoring occasion and the PDCCH monitoring occasion of associated beam in the PO.
  • PO paging occasion
  • the wireless device can only monitor the PDCCH monitoring occasion of associated beam in the PO. That is, the wireless device does not need to monitor entire PO.
  • FIG. 1 shows examples of 5G usage scenarios to which the technical features of the present disclosure can be applied.
  • FIG. 2 shows an example of a wireless communication system to which the technical features of the present disclosure can be applied.
  • FIG. 3 shows an example of a wireless communication system to which the technical features of the present disclosure can be applied.
  • FIG. 4 shows another example of a wireless communication system to which the technical features of the present disclosure can be applied.
  • FIG. 5 shows a block diagram of a user plane protocol stack to which the technical features of the present disclosure can be applied.
  • FIG. 6 shows a block diagram of a control plane protocol stack to which the technical features of the present disclosure can be applied.
  • FIG. 7 shows an example of paging with multiple beams to which the technical features of the present disclosure can be applied.
  • FIG. 8 shows an example of an enhanced paging procedure according to an embodiment of the present disclosure.
  • FIG. 9 shows another example of an enhanced paging procedure according to an embodiment of the present disclosure.
  • FIG. 10 shows another example of an enhanced paging procedure according to an embodiment of the present disclosure.
  • FIG. 11 shows an example of a case that a group ID does not include an ID of a wireless device according to an embodiment of the present disclosure.
  • FIG. 12 shows an example of a case that a group ID includes an ID of a wireless device according to an embodiment of the present disclosure.
  • FIG. 13 shows another example of an enhanced paging procedure according to an embodiment of the present disclosure.
  • FIG. 14 shows another example of an enhanced paging procedure according to an embodiment of the present disclosure.
  • FIG. 15 shows a UE to which the technical features of the present disclosure can be applied.
  • FIG. 16 shows an example of an AI device to which the technical features of the present disclosure can be applied.
  • FIG. 17 shows an example of an AI system to which the technical features of the present disclosure can be applied.
  • the technical features described below may be used by a communication standard by the 3rd generation partnership project (3GPP) standardization organization, a communication standard by the institute of electrical and electronics engineers (IEEE), etc.
  • the communication standards by the 3GPP standardization organization include long-term evolution (LTE) and/or evolution of LTE systems.
  • LTE long-term evolution
  • LTE-A LTE-advanced
  • LTE-A Pro LTE-A Pro
  • NR 5G new radio
  • the communication standard by the IEEE standardization organization includes a wireless local area network (WLAN) system such as IEEE 802.11a/b/g/n/ac/ax.
  • WLAN wireless local area network
  • the above system uses various multiple access technologies such as orthogonal frequency division multiple access (OFDMA) and/or single carrier frequency division multiple access (SC-FDMA) for downlink (DL) and/or uplink (UL).
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • OFDMA and SC-FDMA may be used for DL and/or UL.
  • the term “/” and “,” should be interpreted to indicate “and/or.”
  • the expression “A/B” may mean “A and/or B.”
  • A, B may mean “A and/or B.”
  • A/B/C may mean “at least one of A, B, and/or C.”
  • A, B, C may mean “at least one of A, B, and/or C.”
  • the term “or” should be interpreted to indicate “and/or.”
  • the expression “A or B” may comprise 1) only A, 2) only B, and/or 3) both A and B.
  • the term “or” in the present disclosure should be interpreted to indicate "additionally or alternatively.”
  • FIG. 1 shows examples of 5G usage scenarios to which the technical features of the present disclosure can be applied.
  • the 5G usage scenarios shown in FIG. 1 are only exemplary, and the technical features of the present disclosure can be applied to other 5G usage scenarios which are not shown in FIG. 1.
  • the three main requirements areas of 5G include (1) enhanced mobile broadband (eMBB) domain, (2) massive machine type communication (mMTC) area, and (3) ultra-reliable and low latency communications (URLLC) area.
  • eMBB enhanced mobile broadband
  • mMTC massive machine type communication
  • URLLC ultra-reliable and low latency communications
  • KPI key performance indicator
  • eMBB focuses on across-the-board enhancements to the data rate, latency, user density, capacity and coverage of mobile broadband access.
  • the eMBB aims ⁇ 10 Gbps of throughput.
  • eMBB far surpasses basic mobile Internet access and covers rich interactive work and media and entertainment applications in cloud and/or augmented reality.
  • Data is one of the key drivers of 5G and may not be able to see dedicated voice services for the first time in the 5G era.
  • the voice is expected to be processed as an application simply using the data connection provided by the communication system.
  • the main reason for the increased volume of traffic is an increase in the size of the content and an increase in the number of applications requiring high data rates.
  • Streaming services (audio and video), interactive video and mobile Internet connectivity will become more common as more devices connect to the Internet. Many of these applications require always-on connectivity to push real-time information and notifications to the user.
  • Cloud storage and applications are growing rapidly in mobile communication platforms, which can be applied to both work and entertainment.
  • Cloud storage is a special use case that drives growth of uplink data rate.
  • 5G is also used for remote tasks on the cloud and requires much lower end-to-end delay to maintain a good user experience when the tactile interface is used.
  • cloud games and video streaming are another key factor that increases the demand for mobile broadband capabilities. Entertainment is essential in smartphones and tablets anywhere, including high mobility environments such as trains, cars and airplanes.
  • Another use case is augmented reality and information retrieval for entertainment.
  • augmented reality requires very low latency and instantaneous data amount.
  • mMTC is designed to enable communication between devices that are low-cost, massive in number and battery-driven, intended to support applications such as smart metering, logistics, and field and body sensors.
  • mMTC aims ⁇ 10 years on battery and/or ⁇ 1 million devices/km2.
  • mMTC allows seamless integration of embedded sensors in all areas and is one of the most widely used 5G applications.
  • IoT internet-of-things
  • Industrial IoT is one of the areas where 5G plays a key role in enabling smart cities, asset tracking, smart utilities, agriculture and security infrastructures.
  • URLLC will make it possible for devices and machines to communicate with ultra-reliability, very low latency and high availability, making it ideal for vehicular communication, industrial control, factory automation, remote surgery, smart grids and public safety applications.
  • URLLC aims ⁇ 1ms of latency.
  • URLLC includes new services that will change the industry through links with ultra-reliability / low latency, such as remote control of key infrastructure and self-driving vehicles.
  • the level of reliability and latency is essential for smart grid control, industrial automation, robotics, drones control and coordination.
  • 5G can complement fiber-to-the-home (FTTH) and cable-based broadband (or DOCSIS) as a means of delivering streams rated from hundreds of megabits per second to gigabits per second.
  • This high speed can be required to deliver TVs with resolutions of 4K or more (6K, 8K and above) as well as virtual reality (VR) and augmented reality (AR).
  • VR and AR applications include mostly immersive sporting events. Certain applications may require special network settings. For example, in the case of a VR game, a game company may need to integrate a core server with an edge network server of a network operator to minimize delay.
  • Automotive is expected to become an important new driver for 5G, with many use cases for mobile communications to vehicles. For example, entertainment for passengers demands high capacity and high mobile broadband at the same time. This is because future users will continue to expect high-quality connections regardless of their location and speed.
  • Another use case in the automotive sector is an augmented reality dashboard.
  • the driver can identify an object in the dark on top of what is being viewed through the front window through the augmented reality dashboard.
  • the augmented reality dashboard displays information that will inform the driver about the object's distance and movement.
  • the wireless module enables communication between vehicles, information exchange between the vehicle and the supporting infrastructure, and information exchange between the vehicle and other connected devices (e.g., devices accompanied by a pedestrian).
  • the safety system allows the driver to guide the alternative course of action so that he can drive more safely, thereby reducing the risk of accidents.
  • the next step will be a remotely controlled vehicle or self-driving vehicle. This requires a very reliable and very fast communication between different self-driving vehicles and between vehicles and infrastructure. In the future, a self-driving vehicle will perform all driving activities, and the driver will focus only on traffic that the vehicle itself cannot identify.
  • the technical requirements of self-driving vehicles require ultra-low latency and high-speed reliability to increase traffic safety to a level not achievable by humans.
  • Smart cities and smart homes which are referred to as smart societies, will be embedded in high density wireless sensor networks.
  • the distributed network of intelligent sensors will identify conditions for cost and energy-efficient maintenance of a city or house. A similar setting can be performed for each home.
  • Temperature sensors, windows and heating controllers, burglar alarms and appliances are all wirelessly connected. Many of these sensors typically require low data rate, low power and low cost.
  • real-time high-definition (HD) video may be required for certain types of devices for monitoring.
  • the smart grid interconnects these sensors using digital information and communication technologies to collect and act on information. This information can include supplier and consumer behavior, allowing the smart grid to improve the distribution of fuel, such as electricity, in terms of efficiency, reliability, economy, production sustainability, and automated methods.
  • the smart grid can be viewed as another sensor network with low latency.
  • the health sector has many applications that can benefit from mobile communications.
  • Communication systems can support telemedicine to provide clinical care in remote locations. This can help to reduce barriers to distance and improve access to health services that are not continuously available in distant rural areas. It is also used to save lives in critical care and emergency situations.
  • Mobile communication based wireless sensor networks can provide remote monitoring and sensors for parameters such as heart rate and blood pressure.
  • Wireless and mobile communications are becoming increasingly important in industrial applications. Wiring costs are high for installation and maintenance. Thus, the possibility of replacing a cable with a wireless link that can be reconfigured is an attractive opportunity in many industries. However, achieving this requires that wireless connections operate with similar delay, reliability, and capacity as cables and that their management is simplified. Low latency and very low error probabilities are new requirements that need to be connected to 5G.
  • Logistics and freight tracking are important use cases of mobile communications that enable tracking of inventory and packages anywhere using location based information systems. Use cases of logistics and freight tracking typically require low data rates, but require a large range and reliable location information.
  • FIG. 2 shows an example of a wireless communication system to which the technical features of the present disclosure can be applied.
  • the wireless communication system may include a first device 210 and a second device 220.
  • the first device 210 includes a base station, a network node, a transmitting UE, a receiving UE, a wireless device, a wireless communication device, a vehicle, a vehicle equipped with an autonomous driving function, a connected car, a drone, an unmanned aerial vehicle (UAV), an artificial intelligence (AI) module, a robot, an AR device, a VR device, a mixed reality (MR) device, a hologram device, a public safety device, an MTC device, an IoT device, a medical device, a fin-tech device (or, a financial device), a security device, a climate/environmental device, a device related to 5G services, or a device related to the fourth industrial revolution.
  • UAV unmanned aerial vehicle
  • AI artificial intelligence
  • MR mixed reality
  • hologram device a public safety device
  • MTC device an IoT device
  • medical device a fin-tech device (or, a financial device)
  • a security device a climate/environmental device, a device
  • the second device 220 includes a base station, a network node, a transmitting UE, a receiving UE, a wireless device, a wireless communication device, a vehicle, a vehicle equipped with an autonomous driving function, a connected car, a drone, a UAV, an AI module, a robot, an AR device, a VR device, an MR device, a hologram device, a public safety device, an MTC device, an IoT device, a medical device, a fin-tech device (or, a financial device), a security device, a climate/environmental device, a device related to 5G services, or a device related to the fourth industrial revolution.
  • the UE may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, a slate personal computer (PC), a tablet PC, an ultrabook, a wearable device (e.g., a smartwatch, a smart glass, a head mounted display (HMD)) .
  • the HMD may be a display device worn on the head.
  • the HMD may be used to implement AR, VR and/or MR.
  • the drone may be a flying object that is flying by a radio control signal without a person boarding it.
  • the VR device may include a device that implements an object or background in the virtual world.
  • the AR device may include a device that implements connection of an object and/or a background of a virtual world to an object and/or a background of the real world.
  • the MR device may include a device that implements fusion of an object and/or a background of a virtual world to an object and/or a background of the real world.
  • the hologram device may include a device that implements a 360-degree stereoscopic image by recording and playing stereoscopic information by utilizing a phenomenon of interference of light generated by the two laser lights meeting with each other, called holography.
  • the public safety device may include a video relay device or a video device that can be worn by the user's body.
  • the MTC device and the IoT device may be a device that do not require direct human intervention or manipulation.
  • the MTC device and the IoT device may include a smart meter, a vending machine, a thermometer, a smart bulb, a door lock and/or various sensors.
  • the medical device may be a device used for the purpose of diagnosing, treating, alleviating, handling, or preventing a disease.
  • the medical device may be a device used for the purpose of diagnosing, treating, alleviating, or correcting an injury or disorder.
  • the medical device may be a device used for the purpose of inspecting, replacing or modifying a structure or function.
  • the medical device may be a device used for the purpose of controlling pregnancy.
  • the medical device may include a treatment device, a surgical device, an (in vitro) diagnostic device, a hearing aid and/or a procedural device, etc.
  • a security device may be a device installed to prevent the risk that may occur and to maintain safety.
  • the security device may include a camera, a closed-circuit TV (CCTV), a recorder, or a black box.
  • the fin-tech device may be a device capable of providing financial services such as mobile payment.
  • the fin-tech device may include a payment device or a point of sales (POS).
  • the climate/environmental device may include a device for monitoring or predicting the climate/environment.
  • the first device 210 may include at least one or more processors, such as a processor 211, at least one memory, such as a memory 212, and at least one transceiver, such as a transceiver 213.
  • the processor 211 may perform the functions, procedures, and/or methods of the present disclosure described below.
  • the processor 211 may perform one or more protocols. For example, the processor 211 may perform one or more layers of the air interface protocol.
  • the memory 212 is connected to the processor 211 and may store various types of information and/or instructions.
  • the transceiver 213 is connected to the processor 211 and may be controlled to transmit and receive wireless signals.
  • the second device 220 may include at least one or more processors, such as a processor 221, at least one memory, such as a memory 222, and at least one transceiver, such as a transceiver 223.
  • the processor 221 may perform the functions, procedures, and/or methods of the present disclosure described below.
  • the processor 221 may perform one or more protocols. For example, the processor 221 may perform one or more layers of the air interface protocol.
  • the memory 222 is connected to the processor 221 and may store various types of information and/or instructions.
  • the transceiver 223 is connected to the processor 221 and may be controlled to transmit and receive wireless signals.
  • the memory 212, 222 may be connected internally or externally to the processor 211, 221, or may be connected to other processors via a variety of technologies such as wired or wireless connections.
  • the first device 210 and/or the second device 220 may have more than one antenna.
  • antenna 214 and/or antenna 224 may be configured to transmit and receive wireless signals.
  • FIG. 3 shows an example of a wireless communication system to which the technical features of the present disclosure can be applied.
  • FIG. 3 shows a system architecture based on an evolved-UMTS terrestrial radio access network (E-UTRAN).
  • E-UTRAN evolved-UMTS terrestrial radio access network
  • the aforementioned LTE is a part of an evolved-UTMS (e-UMTS) using the E-UTRAN.
  • e-UMTS evolved-UTMS
  • the wireless communication system includes one or more user equipment (UE) 310, an E-UTRAN and an evolved packet core (EPC).
  • the UE 310 refers to a communication equipment carried by a user.
  • the UE 310 may be fixed or mobile.
  • the UE 310 may be referred to as another terminology, such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a wireless device, etc.
  • MS mobile station
  • UT user terminal
  • SS subscriber station
  • wireless device etc.
  • the E-UTRAN consists of one or more evolved NodeB (eNB) 320.
  • the eNB 320 provides the E-UTRA user plane and control plane protocol terminations towards the UE 10.
  • the eNB 320 is generally a fixed station that communicates with the UE 310.
  • the eNB 320 hosts the functions, such as inter-cell radio resource management (RRM), radio bearer (RB) control, connection mobility control, radio admission control, measurement configuration/provision, dynamic resource allocation (scheduler), etc.
  • RRM inter-cell radio resource management
  • RB radio bearer
  • connection mobility control such as connection mobility control
  • radio admission control such as measurement configuration/provision
  • the eNB 320 may be referred to as another terminology, such as a base station (BS), a base transceiver system (BTS), an access point (AP), etc.
  • BS base station
  • BTS base transceiver system
  • AP access point
  • a downlink (DL) denotes communication from the eNB 320 to the UE 310.
  • An uplink (UL) denotes communication from the UE 310 to the eNB 320.
  • a sidelink (SL) denotes communication between the UEs 310.
  • a transmitter may be a part of the eNB 320, and a receiver may be a part of the UE 310.
  • the transmitter may be a part of the UE 310, and the receiver may be a part of the eNB 320.
  • the transmitter and receiver may be a part of the UE 310.
  • the EPC includes a mobility management entity (MME), a serving gateway (S-GW) and a packet data network (PDN) gateway (P-GW).
  • MME hosts the functions, such as non-access stratum (NAS) security, idle state mobility handling, evolved packet system (EPS) bearer control, etc.
  • NAS non-access stratum
  • EPS evolved packet system
  • the S-GW hosts the functions, such as mobility anchoring, etc.
  • the S-GW is a gateway having an E-UTRAN as an endpoint.
  • MME/S-GW 330 will be referred to herein simply as a "gateway," but it is understood that this entity includes both the MME and S-GW.
  • the P-GW hosts the functions, such as UE Internet protocol (IP) address allocation, packet filtering, etc.
  • IP Internet protocol
  • the P-GW is a gateway having a PDN as an endpoint.
  • the P-GW is connected to an external network.
  • the UE 310 is connected to the eNB 320 by means of the Uu interface.
  • the UEs 310 are interconnected with each other by means of the PC5 interface.
  • the eNBs 320 are interconnected with each other by means of the X2 interface.
  • the eNBs 320 are also connected by means of the S1 interface to the EPC, more specifically to the MME by means of the S1-MME interface and to the S-GW by means of the S1-U interface.
  • the S1 interface supports a many-to-many relation between MMEs / S-GWs and eNBs.
  • FIG. 4 shows another example of a wireless communication system to which the technical features of the present disclosure can be applied.
  • FIG. 4 shows a system architecture based on a 5G NR.
  • the entity used in the 5G NR (hereinafter, simply referred to as "NR") may absorb some or all of the functions of the entities introduced in FIG. 3 (e.g., eNB, MME, S-GW).
  • the entity used in the NR may be identified by the name "NG" for distinction from the LTE/LTE-A.
  • the wireless communication system includes one or more UE 410, a next-generation RAN (NG-RAN) and a 5th generation core network (5GC).
  • the NG-RAN consists of at least one NG-RAN node.
  • the NG-RAN node is an entity corresponding to the eNB 320 shown in FIG. 3.
  • the NG-RAN node consists of at least one gNB 421 and/or at least one ng-eNB 422.
  • the gNB 421 provides NR user plane and control plane protocol terminations towards the UE 410.
  • the ng-eNB 422 provides E-UTRA user plane and control plane protocol terminations towards the UE 410.
  • the 5GC includes an access and mobility management function (AMF), a user plane function (UPF) and a session management function (SMF).
  • AMF hosts the functions, such as NAS security, idle state mobility handling, etc.
  • the AMF is an entity including the functions of the conventional MME.
  • the UPF hosts the functions, such as mobility anchoring, protocol data unit (PDU) handling.
  • PDU protocol data unit
  • the UPF an entity including the functions of the conventional S-GW.
  • the SMF hosts the functions, such as UE IP address allocation, PDU session control.
  • the gNBs 421 and ng-eNBs 422 are interconnected with each other by means of the Xn interface.
  • the gNBs 421 and ng-eNBs 422 are also connected by means of the NG interfaces to the 5GC, more specifically to the AMF by means of the NG-C interface and to the UPF by means of the NG-U interface.
  • layers of a radio interface protocol between the UE and the network may be classified into a first layer (L1), a second layer (L2), and a third layer (L3) based on the lower three layers of the open system interconnection (OSI) model that is well-known in the communication system.
  • OSI open system interconnection
  • FIG. 5 shows a block diagram of a user plane protocol stack to which the technical features of the present disclosure can be applied.
  • FIG. 6 shows a block diagram of a control plane protocol stack to which the technical features of the present disclosure can be applied.
  • the user/control plane protocol stacks shown in FIG. 5 and FIG. 6 are used in NR. However, user/control plane protocol stacks shown in FIG. 5 and FIG. 6 may be used in LTE/LTE-A without loss of generality, by replacing gNB/AMF with eNB/MME.
  • the PHY layer offers information transfer services to media access control (MAC) sublayer and higher layers.
  • the PHY layer offers to the MAC sublayer transport channels. Data between the MAC sublayer and the PHY layer is transferred via the transport channels. Between different PHY layers, i.e., between a PHY layer of a transmission side and a PHY layer of a reception side, data is transferred via the physical channels.
  • the MAC sublayer belongs to L2.
  • the main services and functions of the MAC sublayer include mapping between logical channels and transport channels, multiplexing/de-multiplexing of MAC service data units (SDUs) belonging to one or different logical channels into/from transport blocks (TB) delivered to/from the physical layer on transport channels, scheduling information reporting, error correction through hybrid automatic repeat request (HARQ), priority handling between UEs by means of dynamic scheduling, priority handling between logical channels of one UE by means of logical channel prioritization (LCP), etc.
  • the MAC sublayer offers to the radio link control (RLC) sublayer logical channels.
  • RLC radio link control
  • the RLC sublayer belong to L2.
  • the RLC sublayer supports three transmission modes, i.e., transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (AM), in order to guarantee various quality of services (QoS) required by radio bearers.
  • the main services and functions of the RLC sublayer depend on the transmission mode.
  • the RLC sublayer provides transfer of upper layer PDUs for all three modes, but provides error correction through ARQ for AM only.
  • LTE/LTE-A the RLC sublayer provides concatenation, segmentation and reassembly of RLC SDUs (only for UM and AM data transfer) and re-segmentation of RLC data PDUs (only for AM data transfer).
  • the RLC sublayer provides segmentation (only for AM and UM) and re-segmentation (only for AM) of RLC SDUs and reassembly of SDU (only for AM and UM). That is, the NR does not support concatenation of RLC SDUs.
  • the RLC sublayer offers to the packet data convergence protocol (PDCP) sublayer RLC channels.
  • PDCP packet data convergence protocol
  • the PDCP sublayer belong to L2.
  • the main services and functions of the PDCP sublayer for the user plane include header compression and decompression, transfer of user data, duplicate detection, PDCP PDU routing, retransmission of PDCP SDUs, ciphering and deciphering, etc.
  • the main services and functions of the PDCP sublayer for the control plane include ciphering and integrity protection, transfer of control plane data, etc.
  • the service data adaptation protocol (SDAP) sublayer belong to L2.
  • the SDAP sublayer is only defined in the user plane.
  • the SDAP sublayer is only defined for NR.
  • the main services and functions of SDAP include, mapping between a QoS flow and a data radio bearer (DRB), and marking QoS flow ID (QFI) in both DL and UL packets.
  • the SDAP sublayer offers to 5GC QoS flows.
  • a radio resource control (RRC) layer belongs to L3.
  • the RRC layer is only defined in the control plane.
  • the RRC layer controls radio resources between the UE and the network.
  • the RRC layer exchanges RRC messages between the UE and the BS.
  • the main services and functions of the RRC layer include broadcast of system information related to AS and NAS, paging, establishment, maintenance and release of an RRC connection between the UE and the network, security functions including key management, establishment, configuration, maintenance and release of radio bearers, mobility functions, QoS management functions, UE measurement reporting and control of the reporting, NAS message transfer to/from NAS from/to UE.
  • the RRC layer controls logical channels, transport channels, and physical channels in relation to the configuration, reconfiguration, and release of radio bearers.
  • a radio bearer refers to a logical path provided by L1 (PHY layer) and L2 (MAC/RLC/PDCP/SDAP sublayer) for data transmission between a UE and a network.
  • Setting the radio bearer means defining the characteristics of the radio protocol layer and the channel for providing a specific service, and setting each specific parameter and operation method.
  • Radio bearer may be divided into signaling RB (SRB) and data RB (DRB).
  • SRB signaling RB
  • DRB data RB
  • An RRC state indicates whether an RRC layer of the UE is logically connected to an RRC layer of the E-UTRAN.
  • RRC_CONNECTED when the RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in the RRC connected state (RRC_CONNECTED). Otherwise, the UE is in the RRC idle state (RRC_IDLE).
  • RRC_INACTIVE is additionally introduced.
  • RRC_INACTIVE may be used for various purposes. For example, the massive machine type communications (MMTC) UEs can be efficiently managed in RRC_INACTIVE. When a specific condition is satisfied, transition is made from one of the above three states to the other.
  • a predetermined operation may be performed according to the RRC state.
  • RRC_IDLE public land mobile network (PLMN) selection, broadcast of system information (SI), cell re-selection mobility, core network (CN) paging and discontinuous reception (DRX) configured by NAS may be performed.
  • PLMN public land mobile network
  • SI system information
  • CN core network
  • DRX discontinuous reception
  • the UE shall have been allocated an identifier (ID) which uniquely identifies the UE in a tracking area. No RRC context stored in the BS.
  • the UE has an RRC connection with the network (i.e., E-UTRAN/NG-RAN).
  • Network-CN connection (both C/U-planes) is also established for UE.
  • the UE AS context is stored in the network and the UE.
  • the RAN knows the cell which the UE belongs to.
  • the network can transmit and/or receive data to/from UE.
  • Network controlled mobility including measurement is also performed.
  • RRC_IDLE Most of operations performed in RRC_IDLE may be performed in RRC_INACTIVE. But, instead of CN paging in RRC_IDLE, RAN paging is performed in RRC_INACTIVE. In other words, in RRC_IDLE, paging for mobile terminated (MT) data is initiated by core network and paging area is managed by core network. In RRC_INACTIVE, paging is initiated by NG-RAN, and RAN-based notification area (RNA) is managed by NG-RAN. Further, instead of DRX for CN paging configured by NAS in RRC_IDLE, DRX for RAN paging is configured by NG-RAN in RRC_INACTIVE.
  • DRX for CN paging configured by NAS in RRC_IDLE
  • DRX for RAN paging is configured by NG-RAN in RRC_INACTIVE.
  • 5GC-NG-RAN connection (both C/U-planes) is established for UE, and the UE AS context is stored in NG-RAN and the UE.
  • NG-RAN knows the RNA which the UE belongs to.
  • the NAS layer is located at the top of the RRC layer.
  • the NAS control protocol performs the functions, such as authentication, mobility management, security control.
  • NR supports multiple numerology (or, subcarrier spacing (SCS)) to support various 5G services. For example, when the SCS is 15 kHz, wide area in traditional cellular bands may be supported. When the SCS is 30 kHz/60 kHz, dense-urban, lower latency and wider carrier bandwidth may be supported. When the SCS is 60 kHz or higher, a bandwidth greater than 24.25 GHz may be supported to overcome phase noise.
  • SCS subcarrier spacing
  • the NR frequency band may be defined as two types of frequency range, i.e., FR1 and FR2.
  • the numerical value of the frequency range may be changed.
  • the frequency ranges of the two types may be as shown in Table 1 below.
  • FR1 may mean "sub 6 GHz range”
  • FR2 may mean "above 6 GHz range”
  • mmW millimeter wave
  • FR1 may include a frequency band of 410MHz to 7125MHz as shown in Table 2 below. That is, FR1 may include a frequency band of 6GHz (or 5850, 5900, 5925 MHz, etc.) or more. For example, a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or more included in FR1 may include an unlicensed band. Unlicensed bands may be used for a variety of purposes, for example for communication for vehicles (e.g., autonomous driving).
  • Section 7.1 of 3GPP TS 38.304 V15.0.0 (2018-06) can be referred.
  • the UE may use discontinuous reception (DRX) in RRC_IDLE and RRC_INACTIVE state in order to reduce power consumption.
  • the UE monitors one paging occasion (PO) per DRX cycle.
  • a PO is a set of PDCCH monitoring occasions and can consist of multiple time slots (e.g., subframe or OFDM symbol) where paging downlink control information (DCI) can be sent.
  • DCI paging downlink control information
  • One Paging frame (PF) is one radio frame and may contain one or multiple PO(s) or starting point of a PO.
  • the length of one PO is one period of beam sweeping and the UE can assume that the same paging message is repeated in all beams of the sweeping pattern and thus the selection of the beam(s) for the reception of the paging message is up to UE implementation.
  • the paging message is same for both RAN initiated paging and CN initiated paging.
  • the UE initiates RRC connection resume procedure upon receiving RAN paging. If the UE receives a CN initiated paging in RRC_INACTIVE state, the UE moves to RRC_IDLE and informs NAS.
  • PF, PO are determined by the following equations.
  • SFN System frame number
  • Equation 2 i_s
  • the PDCCH monitoring occasions for paging are determined according to paging-SearchSpace if configured and according to the default association (i.e., PDCCH monitoring occasions for paging are same as for remaining minimum SI (RMSI)) otherwise.
  • RMSI remaining minimum SI
  • Ns is either 1 or 2.
  • Ns 1, there is only one PO which starts in the PF.
  • the UE monitors the (i_s + 1) th PO where the first PO starts in the PF.
  • T DRX cycle of the UE (T is determined by the shortest of the UE specific DRX value, if configured by RRC or upper layers, and a default DRX value broadcast in system information. If UE specific DRX is not configured by upper layers, the default value is applied)
  • IMSI international mobile subscriber identity
  • nB Parameters nB, PF_offset, and the length of default DRX cycle are signaled in SystemInformationBlock1 .
  • IMSI is given as sequence of digits of type Integer (0..9). IMSI shall in the equation above be interpreted as a decimal integer number, where the first digit given in the sequence represents the highest order digit.
  • Wakeup signal (WUS) is described. Section 7.4 of 3GPP TS 36.304 V15.0.0 (2018-06) can be referred.
  • WUS is used to indicate that the UE shall attempt to receive paging in that cell.
  • WUS may be used for the purpose of power consumption.
  • WUS may be specifically beneficial to MTC UEs and/or narrowband (NB)-IoT UEs.
  • the UE When the UE supports WUS and WUS configuration is provided in system information, the UE shall monitor WUS using the WUS parameters provided in system information.
  • DRX is used and the UE detects WUS
  • the UE shall monitor the following PO.
  • extended DRX is used and the UE detects WUS
  • the UE shall monitor the following numPOs or until a paging message is received, whichever is earlier.
  • the numPOs is the number of consecutive POs mapped to one WUS provided in system information where numPOs ⁇ 1 . If the UE does not detect WUS, the UE is not required to monitor the following PO(s).
  • Enabling/disabling of WUS may be configured per cell. After cell reselection, the UE may monitor every PO until the next WUS or until paging time window (PTW) ends (whichever is first). If the network sends direct indication or paging for SI modification, then WUS may be sent.
  • PGW paging time window
  • LAA licensed-assisted access
  • the configured set of serving cells for a UE therefore always includes at least one SCell operating in the unlicensed spectrum according to frame structure Type 3, also called LAA SCell.
  • LAA SCells act as regular SCells.
  • LAA eNB and UE apply listen-before-talk (LBT) before performing a transmission on LAA SCell.
  • LBT listen-before-talk
  • the transmitter listens to/senses the channel to determine whether the channel is free or busy. If the channel is determined to be free, the transmitter may perform the transmission. Otherwise, it does not perform the transmission. If an LAA eNB uses channel access signals of other technologies for the purpose of LAA channel access, it shall continue to meet the LAA maximum energy detection threshold requirement.
  • a cell on an unlicensed bands is not considered as primary cell (PCell), but only as secondary cell (SCell).
  • PCell primary cell
  • SCell secondary cell
  • a cell on an unlicensed bands can be considered as a PCell. Therefore, paging reception should be newly considered in the cell on the unlicensed band.
  • a paging cycle is defined to allow UEs to wake up at predefined time slots to receive possible paging message.
  • the paging configuration could be cell specific or UE specific. It has been already agreed to support paging for RRC_IDLE where paging message is scheduled by DCI carried by PDCCH and is transmitted in the associated PDSCH. For paging message transmission on unlicensed bands, the problem of uncertainty of channel availability makes paging DCI hard to be sent out at the predefined time slot. That is, UEs may miss its paging message.
  • the PDCCH monitoring occasions for paging are same as for RMSI.
  • the time distance between synchronization signal (SS)/physical broadcast channel (PBCH) block (or, simply as SSB) and RMSI is not so far/distant. So, the UE can assume that the beam quality of paging is same as for SSB.
  • the UE monitors the received paging- SearchSpace , which is not same as for RMSI.
  • the periodicity of SSB is 20ms for pattern1 (i.e., in case that SSB and RMSI/COREST are multiplexed by time division multiplexing (TDM)), but periodicity of SSB can be ⁇ 5ms, 10ms, 20ms, 40ms, 80ms, 160ms ⁇ for pattern2 or pattern3 (i.e., in case that SSB and RMSI/COREST are multiplexed by frequency division multiplexing (FDM)). So, in the worst case, some PO can be timely distant from SSB about 160ms.
  • TDM time division multiplexing
  • FDM frequency division multiplexing
  • FIG. 7 shows an example of paging with multiple beams to which the technical features of the present disclosure can be applied.
  • the UE can remain awakening until its PO.
  • the power consumption would be high.
  • UE's PO is 4th PO, it may be timely distant from SSB.
  • the UE should remain awakening until 4th PO, which may lead high power consumption.
  • the UE can go to sleep and wake up at the associated beam location of PDCCH monitoring occasion in the PO. In this case, the UE monitors only one beam which is associated with the SSB so that power consumption can be reduced.
  • the UE could not find its paging and wait until the PO in the next DRX cycle. For example, an index of the best beam of SSB was #3, but the best beam is changed to the #1. The UE may wake up at #3 beam but the beam quality may be not good enough. Then, the paging would be delayed.
  • the UE can go to sleep and wake up at the starting point of PO. In the case, UE monitors all beams of PO and it causes power consumption.
  • FIG. 8 shows an example of an enhanced paging procedure according to an embodiment of the present disclosure.
  • step S800 the wireless device calculates a paging occasion based on ID of the wireless device.
  • the wireless device monitors a first PDCCH monitoring occasion in the PO.
  • the first PDCCH monitoring occasion may include one period of beam sweeping for the multiple beams.
  • step S820 the wireless device receives a power saving signal including information on a group ID in the first PDCCH monitoring occasion via multiple beams.
  • the power saving signal may inform whether the wireless device needs to monitor the remaining PDCCH monitoring occasions or not.
  • the power saving signal may include information on a beam index which the wireless device needs to monitor.
  • the power saving signal may include information on a starting point of each beam which the wireless device needs to monitor.
  • the power saving signal may include a discovery signal.
  • the discovery signal may include at least one of SSB and/or a channel state information reference signal (CSI-RS). It may be determined that the discovery signal is received upon a cell quality derived from the discovery signal being above a minimum cell selection value.
  • the discovery signal is transmitted from a network upon successful LBT.
  • step S830 the wireless device monitors remaining PDCCH monitoring occasions in the PO based on the group ID including the ID of the wireless device. That is, when the group ID includes the ID of the wireless device, the wireless device monitors remaining PDCCH monitoring occasions in the PO based on the group ID including the ID of the wireless device.
  • the wireless may skip monitoring the remaining PDCCH monitoring occasions in the PO based on the group ID not including the ID of the wireless device. That is, when the group ID does not include the ID of the wireless device, the wireless may not monitor the remaining PDCCH monitoring occasions in the PO.
  • the wireless device may be in communication with at least one of a user equipment, a network, and/or autonomous vehicles other than the wireless device.
  • FIG. 9 shows another example of an enhanced paging procedure according to an embodiment of the present disclosure.
  • step S900 the wireless device calculates the PF/PO with its ID.
  • step S910 the wireless device monitors the first PDCCH monitoring occasion of determined PO.
  • the first PDCCH monitoring occasion may include one period of beam sweeping.
  • each beam among multiple beams in the first PDCCH monitoring occasion may include a power saving signal.
  • the power saving signal may include group ID to inform which wireless device needs to monitor remaining PDCCH occasions on the determined PO.
  • the group ID may be bit information to indicate specific wireless device in the determined PO.
  • the group ID may be calculated by ID of wireless device.
  • the power saving signal may include information on beam index to inform the beam which the wireless device needs to monitor.
  • the power saving signal may include information on the starting point of each beam to inform the exact location of each beam.
  • step S920 if the wireless device monitors the first PDCCH monitoring occasion and the group ID does not include the ID of the wireless device, the wireless device would not monitor the remaining PO and go to sleep until next DRX cycle.
  • step S930 if the wireless device monitors the first PDCCH monitoring occasion and the group ID includes the ID of the wireless device, the wireless device monitors the remaining PDCCH monitoring occasions of associated beam in the PO.
  • FIG. 10 shows another example of an enhanced paging procedure according to an embodiment of the present disclosure.
  • step S1000 the wireless device calculates the PF/PO with its ID.
  • step S1010 the wireless device monitors the first PDCCH monitoring occasion of determined PO.
  • the network (e.g., any one of base station, gNB or eNB) transmits a power saving signal of each beam among multiple beams at the first PDCCH monitoring occasion in each PO.
  • the first PDCCH monitoring occasion may include one period of beam sweeping.
  • the power saving signal may include group ID to inform which wireless device needs to monitor remaining PDCCH occasions on the determined PO.
  • the group ID may be bit information to indicate specific wireless device in the determined PO.
  • the group ID may be calculated by ID of wireless device.
  • the power saving signal may include information on beam index to inform the beam which the wireless device needs to monitor.
  • the power saving signal may include information on the starting point of each beam to inform the exact location of each beam.
  • the network may send the paging at the first PDCCH monitoring occasion in the each PO.
  • step S1020 if the wireless device monitors the first PDCCH monitoring occasion and the group ID includes the ID of the wireless device, the wireless device monitors the remaining PDCCH monitoring occasions of associated beam in the PO.
  • the wireless device monitors the first PDCCH monitoring occasion and the group ID does not include the ID of the wireless device, the wireless device would not monitor the remaining PO and go to sleep until next DRX cycle.
  • FIG. 11 shows an example of a case that a group ID does not include an ID of a wireless device according to an embodiment of the present disclosure.
  • the wireless device monitors paging as follows. At first, the wireless device calculates the PF/PO with its ID. Then, the wireless device monitors the first PDCCH monitoring occasion of determined PO.
  • the first PDCCH monitoring occasion may include one period of beam sweeping.
  • the each beam in the first PDCCH monitoring occasion may include power saving signal.
  • the power saving signal may include group ID to inform which the wireless device needs to monitor remaining PO.
  • the power saving signal may also include beam index to inform the beam which the wireless device needs to monitor.
  • the power saving signal may include the starting point of each beam to inform the exact location of each beam.
  • the wireless device monitors the first PDCCH monitoring occasion and the group ID does not include the ID of the wireless device, the wireless device would not monitor the remaining PO and go to sleep until next DRX cycle. Therefore, the wireless device only monitors first PDCCH monitoring occasion and go to sleep. The power consumption can be reduced.
  • FIG. 12 shows an example of a case that a group ID includes an ID of a wireless device according to an embodiment of the present disclosure.
  • the wireless device monitors the first PDCCH monitoring occasion and the group ID includes the ID of the wireless device
  • the wireless device monitor the remaining PDCCH monitoring occasion of associated beam in the PO. For example, if the wireless device is associated to the 3rd beam e.g., based on SSB, the wireless device can find its group ID at the 3rd beam of first PDCCH monitoring occasion. Then, the wireless device would monitor the fourth PDCCH monitoring occasion. Therefore, the wireless device can only monitor first PDCCH monitoring occasion and one PDCCH monitoring occasion associated the beam. The power consumption can be reduced.
  • the wireless device could find the best beam through the power saving signal.
  • the power saving signal is received in the PO and includes beam index. So, the wireless device can find the best beam and the PO would not be far from the beam index. Then, the probability of beam change would be reduced.
  • the power saving signal may include starting point of each beam informing the exact location of each beam. Then the wireless device would monitor the informed location. In other words, if the power saving signal includes beam index #3 and OFDM symbol location #33, the wireless device would monitor 33th OFDM symbol. In the case, the wireless device can easily find the exact monitoring location, even if the beam sweep is not consecutive.
  • FIG. 13 shows another example of an enhanced paging procedure according to an embodiment of the present disclosure.
  • step S1300 the wireless device calculates the PF/PO with its ID.
  • the wireless device may receive additional PO information from the network (via SIB and/or RRC signaling message).
  • step S1310 the wireless device monitors the first PDCCH monitoring occasion of determined PO.
  • the first PDCCH monitoring occasion may include one period of beam sweeping.
  • each beam among multiple beams in the first PDCCH monitoring occasion may include a power saving signal.
  • the power saving signal may include group ID to inform which wireless device needs to monitor remaining PDCCH occasions on the determined PO.
  • the group ID may be bit information to indicate specific wireless device in the determined PO.
  • the group ID may be calculated by ID of wireless device.
  • the power saving signal may include information on beam index to inform the beam which the wireless device needs to monitor.
  • the power saving signal may include information on the starting point of each beam to inform the exact location of each beam.
  • step S1320 if the wireless device detects discovery signal at the first PDCCH monitoring occasion and the group ID does not include the ID of the wireless device, the wireless device would not monitor the remaining PO and go to sleep until next DRX cycle.
  • step S1330 if the wireless device detects discovery signal at the first PDCCH monitoring occasion and the group ID includes the ID of the wireless device, the wireless device monitors the remaining PDCCH monitoring occasion of associated beam in the PO.
  • step S1340 if the wireless device does not detect discovery signal at the first PDCCH monitoring occasion, the wireless device would not monitor the remaining PO and go to sleep until next DRX cycle and/or additional PO.
  • the discovery signal may include at least one of SSB and/or CSI-RS.
  • the discovery signal may include a combination of SSB and/or CSI-RS.
  • the wireless device When the wireless device detects the discovery signal, the wireless device would derive cell quality from received discovery signal. After the wireless device derives the cell quality and the cell quality is above the minimum cell selection value (e.g. Qrxlevmin), the wireless device may assume that wireless device detects the discovery signal. After the wireless device derives the cell quality and the cell quality is below the minimum cell selection value (e.g. Qrxlevmin) or cannot derive the cell quality, the wireless device may assume that the wireless device does not detect the discovery signal.
  • the minimum cell selection value e.g. Qrxlevmin
  • FIG. 14 shows another example of an enhanced paging procedure according to an embodiment of the present disclosure.
  • step S1400 the wireless device calculates the PF/PO with its ID.
  • the network may send additional PO information from the network (via SIB and/or RRC signaling message).
  • step S1410 the network performs LBT before sending paging.
  • step S1420 the wireless device monitors the first PDCCH monitoring occasion of determined PO.
  • step S1421 if LBT is succeed, the network transmits a power saving signal of each beam among multiple beams at the first PDCCH monitoring occasion in each PO and sends paging at each beam in each PO.
  • the first PDCCH monitoring occasion may include one period of beam sweeping.
  • the power saving signal may include group ID to inform which wireless device needs to monitor remaining PDCCH occasions on the determined PO.
  • the group ID may be bit information to indicate specific wireless device in the determined PO.
  • the group ID may be calculated by ID of wireless device.
  • the power saving signal may include information on beam index to inform the beam which the wireless device needs to monitor.
  • the power saving signal may include information on the starting point of each beam to inform the exact location of each beam.
  • the network may not send power saving signal and/or paging at the PO and perform LBT at additional PO and/or next PO.
  • step S1430 if the wireless device detects discovery signal at the first PDCCH monitoring occasion and the group ID includes the ID of the wireless device, the wireless device monitors the remaining PDCCH monitoring occasion of associated beam in the PO.
  • the discovery signal may include at least one of SSB and/or CSI-RS.
  • the discovery signal may include a combination of SSB and/or CSI-RS.
  • the wireless device When the wireless device detects the discovery signal, the wireless device would derive cell quality from received discovery signal. After the wireless device derives the cell quality and the cell quality is above the minimum cell selection value (e.g. Qrxlevmin), the wireless device may assume that wireless device detects the discovery signal. After the wireless device derives the cell quality and the cell quality is below the minimum cell selection value (e.g. Qrxlevmin) or cannot derive the cell quality, the wireless device may assume that the wireless device does not detect the discovery signal.
  • the minimum cell selection value e.g. Qrxlevmin
  • the wireless device if the wireless device detects discovery signal at the first PDCCH monitoring occasion and the group ID does not include the ID of the wireless device, the wireless device would not monitor the remaining PO and go to sleep until next DRX cycle.
  • the wireless device would not monitor the remaining PO and go to sleep until next DRX cycle and/or additional PO.
  • the discovery signal may include at least one of SSB and/or CSI-RS.
  • the discovery signal may include a combination of SSB and/or CSI-RS.
  • the wireless device When the wireless device detects the discovery signal, the wireless device would derive cell quality from received discovery signal. After the wireless device derives the cell quality and the cell quality is above the minimum cell selection value (e.g. Qrxlevmin), the wireless device may assume that wireless device detects the discovery signal. After the wireless device derives the cell quality and the cell quality is below the minimum cell selection value (e.g. Qrxlevmin) or cannot derive the cell quality, the wireless device may assume that the wireless device does not detect the discovery signal.
  • the minimum cell selection value e.g. Qrxlevmin
  • FIG. 15 shows a UE to which the technical features of the present disclosure can be applied.
  • a UE includes a processor 1510, a power management module 1511, a battery 1512, a display 1513, a keypad 1514, a subscriber identification module (SIM) card 1515, a memory 1520, a transceiver 1530, one or more antennas 1531, a speaker 1540, and a microphone 1541.
  • SIM subscriber identification module
  • the processor 1510 may be configured to implement proposed functions, procedures and/or methods described in this description. Layers of the radio interface protocol may be implemented in the processor 1510.
  • the processor 1510 may include application-specific integrated circuit (ASIC), other chipset, logic circuit and/or data processing device.
  • the processor 1510 may be an application processor (AP).
  • the processor 1510 may include at least one of a digital signal processor (DSP), a central processing unit (CPU), a graphics processing unit (GPU), a modem (modulator and demodulator).
  • DSP digital signal processor
  • CPU central processing unit
  • GPU graphics processing unit
  • modem modulator and demodulator
  • processor 1510 may be found in SNAPDRAGON TM series of processors made by Qualcomm ® , EXYNOS TM series of processors made by Samsung ® , A series of processors made by Apple ® , HELIO TM series of processors made by MediaTek ® , ATOM TM series of processors made by Intel ® or a corresponding next generation processor.
  • the processor 1510 may be configured to perform the steps described in FIG. 8 to FIG. 10 and/or FIG. 13 to FIG. 14. Alternatively, the processor 1510 may be configured to control the memory 1520 and/or the transceiver 1530 to perform the steps described in FIG. 8 to FIG. 10 and/or FIG. 13 to FIG. 14.
  • the power management module 1511 manages power for the processor 1510 and/or the transceiver 1530.
  • the battery 1512 supplies power to the power management module 1511.
  • the display 1513 outputs results processed by the processor 1510.
  • the keypad 1514 receives inputs to be used by the processor 1510.
  • the keypad 1514 may be shown on the display 1513.
  • the SIM card 1515 is an integrated circuit that is intended to securely store the international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephony devices (such as mobile phones and computers). It is also possible to store contact information on many SIM cards.
  • IMSI international mobile subscriber identity
  • the memory 1520 is operatively coupled with the processor 1510 and stores a variety of information to operate the processor 1510.
  • the memory 1520 may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium and/or other storage device.
  • the transceiver 1530 is operatively coupled with the processor 1510, and transmits and/or receives a radio signal.
  • the transceiver 1530 includes a transmitter and a receiver.
  • the transceiver 1530 may include baseband circuitry to process radio frequency signals.
  • the transceiver 1530 controls the one or more antennas 1531 to transmit and/or receive a radio signal.
  • the speaker 1540 outputs sound-related results processed by the processor 1510.
  • the microphone 1541 receives sound-related inputs to be used by the processor 1510.
  • the present disclosure may be applied to various future technologies, such as AI.
  • AI refers to artificial intelligence and/or the field of studying methodology for making it.
  • Machine learning is a field of studying methodologies that define and solve various problems dealt with in AI.
  • Machine learning may be defined as an algorithm that enhances the performance of a task through a steady experience with any task.
  • An artificial neural network is a model used in machine learning. It can mean a whole model of problem-solving ability, consisting of artificial neurons (nodes) that form a network of synapses.
  • An ANN can be defined by a connection pattern between neurons in different layers, a learning process for updating model parameters, and/or an activation function for generating an output value.
  • An ANN may include an input layer, an output layer, and optionally one or more hidden layers. Each layer may contain one or more neurons, and an ANN may include a synapse that links neurons to neurons.
  • each neuron can output a summation of the activation function for input signals, weights, and deflections input through the synapse.
  • Model parameters are parameters determined through learning, including deflection of neurons and/or weights of synaptic connections.
  • the hyper-parameter means a parameter to be set in the machine learning algorithm before learning, and includes a learning rate, a repetition number, a mini batch size, an initialization function, etc.
  • the objective of the ANN learning can be seen as determining the model parameters that minimize the loss function.
  • the loss function can be used as an index to determine optimal model parameters in learning process of ANN.
  • Machine learning can be divided into supervised learning, unsupervised learning, and reinforcement learning, depending on the learning method.
  • Supervised learning is a method of learning ANN with labels given to learning data. Labels are the answers (or result values) that ANN must infer when learning data is input to ANN.
  • Unsupervised learning can mean a method of learning ANN without labels given to learning data.
  • Reinforcement learning can mean a learning method in which an agent defined in an environment learns to select a behavior and/or sequence of actions that maximizes cumulative compensation in each state.
  • Machine learning which is implemented as a deep neural network (DNN) that includes multiple hidden layers among ANN, is also called deep learning. Deep learning is part of machine learning. In the following, machine learning is used to mean deep learning.
  • DNN deep neural network
  • FIG. 16 shows an example of an AI device to which the technical features of the present disclosure can be applied.
  • the AI device 1600 may be implemented as a stationary device or a mobile device, such as a TV, a projector, a mobile phone, a smartphone, a desktop computer, a notebook, a digital broadcasting terminal, a PDA, a PMP, a navigation device, a tablet PC, a wearable device, a set-top box (STB), a digital multimedia broadcasting (DMB) receiver, a radio, a washing machine, a refrigerator, a digital signage, a robot, a vehicle, etc.
  • a mobile device such as a TV, a projector, a mobile phone, a smartphone, a desktop computer, a notebook, a digital broadcasting terminal, a PDA, a PMP, a navigation device, a tablet PC, a wearable device, a set-top box (STB), a digital multimedia broadcasting (DMB) receiver, a radio, a washing machine, a refrigerator, a digital signage, a robot, a vehicle, etc.
  • DMB digital multimedia
  • the AI device 1600 may include a communication part 1610, an input part 1620, a learning processor 1630, a sensing part 1640, an output part 1650, a memory 1660, and a processor 1670.
  • the communication part 1610 can transmit and/or receive data to and/or from external devices such as the AI devices and the AI server using wire and/or wireless communication technology.
  • the communication part 1610 can transmit and/or receive sensor information, a user input, a learning model, and a control signal with external devices.
  • the communication technology used by the communication part 1610 may include a global system for mobile communication (GSM), a code division multiple access (CDMA), an LTE/LTE-A, a 5G, a WLAN, a Wi-Fi, Bluetooth TM , radio frequency identification (RFID), infrared data association (IrDA), ZigBee, and/or near field communication (NFC).
  • GSM global system for mobile communication
  • CDMA code division multiple access
  • LTE/LTE-A Long Term Evolution
  • 5G Fifth Generation
  • WLAN Fifth Generation
  • Wi-Fi Wireless Fidelity
  • Bluetooth TM Bluetooth TM
  • RFID radio frequency identification
  • IrDA infrared data association
  • ZigBee ZigBe
  • the input part 1620 can acquire various kinds of data.
  • the input part 1620 may include a camera for inputting a video signal, a microphone for receiving an audio signal, and a user input part for receiving information from a user.
  • a camera and/or a microphone may be treated as a sensor, and a signal obtained from a camera and/or a microphone may be referred to as sensing data and/or sensor information.
  • the input part 1620 can acquire input data to be used when acquiring an output using learning data and a learning model for model learning.
  • the input part 1620 may obtain raw input data, in which case the processor 1670 or the learning processor 1630 may extract input features by preprocessing the input data.
  • the learning processor 1630 may learn a model composed of an ANN using learning data.
  • the learned ANN can be referred to as a learning model.
  • the learning model can be used to infer result values for new input data rather than learning data, and the inferred values can be used as a basis for determining which actions to perform.
  • the learning processor 1630 may perform AI processing together with the learning processor of the AI server.
  • the learning processor 1630 may include a memory integrated and/or implemented in the AI device 1600. Alternatively, the learning processor 1630 may be implemented using the memory 1660, an external memory directly coupled to the AI device 1600, and/or a memory maintained in an external device.
  • the sensing part 1640 may acquire at least one of internal information of the AI device 1600, environment information of the AI device 1600, and/or the user information using various sensors.
  • the sensors included in the sensing part 1640 may include a proximity sensor, an illuminance sensor, an acceleration sensor, a magnetic sensor, a gyro sensor, an inertial sensor, an RGB sensor, an IR sensor, a fingerprint recognition sensor, an ultrasonic sensor, an optical sensor, a microphone, a light detection and ranging (LIDAR), and/or a radar.
  • the output part 1650 may generate an output related to visual, auditory, tactile, etc.
  • the output part 1650 may include a display unit for outputting visual information, a speaker for outputting auditory information, and/or a haptic module for outputting tactile information.
  • the memory 1660 may store data that supports various functions of the AI device 1600.
  • the memory 1660 may store input data acquired by the input part 1620, learning data, a learning model, a learning history, etc.
  • the processor 1670 may determine at least one executable operation of the AI device 1600 based on information determined and/or generated using a data analysis algorithm and/or a machine learning algorithm. The processor 1670 may then control the components of the AI device 1600 to perform the determined operation. The processor 1670 may request, retrieve, receive, and/or utilize data in the learning processor 1630 and/or the memory 1660, and may control the components of the AI device 1600 to execute the predicted operation and/or the operation determined to be desirable among the at least one executable operation. The processor 1670 may generate a control signal for controlling the external device, and may transmit the generated control signal to the external device, when the external device needs to be linked to perform the determined operation.
  • the processor 1670 may obtain the intention information for the user input and determine the user's requirements based on the obtained intention information.
  • the processor 1670 may use at least one of a speech-to-text (STT) engine for converting speech input into a text string and/or a natural language processing (NLP) engine for acquiring intention information of a natural language, to obtain the intention information corresponding to the user input.
  • STT speech-to-text
  • NLP natural language processing
  • At least one of the STT engine and/or the NLP engine may be configured as an ANN, at least a part of which is learned according to a machine learning algorithm.
  • At least one of the STT engine and/or the NLP engine may be learned by the learning processor 1630 and/or learned by the learning processor of the AI server, and/or learned by their distributed processing.
  • the processor 1670 may collect history information including the operation contents of the AI device 1600 and/or the user's feedback on the operation, etc.
  • the processor 1670 may store the collected history information in the memory 1660 and/or the learning processor 1630, and/or transmit to an external device such as the AI server.
  • the collected history information can be used to update the learning model.
  • the processor 1670 may control at least some of the components of AI device 1600 to drive an application program stored in memory 1660. Furthermore, the processor 1670 may operate two or more of the components included in the AI device 1600 in combination with each other for driving the application program.
  • FIG. 17 shows an example of an AI system to which the technical features of the present disclosure can be applied.
  • an AI server 1720 a robot 1710a, an autonomous vehicle 1710b, an XR device 1710c, a smartphone 1710d and/or a home appliance 1710e is connected to a cloud network 1700.
  • the robot 1710a, the autonomous vehicle 1710b, the XR device 1710c, the smartphone 1710d, and/or the home appliance 1710e to which the AI technology is applied may be referred to as AI devices 1710a to 1710e.
  • the cloud network 1700 may refer to a network that forms part of a cloud computing infrastructure and/or resides in a cloud computing infrastructure.
  • the cloud network 1700 may be configured using a 3G network, a 4G or LTE network, and/or a 5G network. That is, each of the devices 1710a to 1710e and 1720 consisting the AI system may be connected to each other through the cloud network 1700.
  • each of the devices 1710a to 1710e and 1720 may communicate with each other through a base station, but may directly communicate with each other without using a base station.
  • the AI server 1720 may include a server for performing AI processing and a server for performing operations on big data.
  • the AI server 1720 is connected to at least one or more of AI devices constituting the AI system, i.e. the robot 1710a, the autonomous vehicle 1710b, the XR device 1710c, the smartphone 1710d and/or the home appliance 1710e through the cloud network 1700, and may assist at least some AI processing of the connected AI devices 1710a to 1710e.
  • the AI server 1720 can learn the ANN according to the machine learning algorithm on behalf of the AI devices 1710a to 1710e, and can directly store the learning models and/or transmit them to the AI devices 1710a to 1710e.
  • the AI server 1720 may receive the input data from the AI devices 1710a to 1710e, infer the result value with respect to the received input data using the learning model, generate a response and/or a control command based on the inferred result value, and transmit the generated data to the AI devices 1710a to 1710e.
  • the AI devices 1710a to 1710e may directly infer a result value for the input data using a learning model, and generate a response and/or a control command based on the inferred result value.
  • the AI devices 1710a to 1710e to which the technical features of the present disclosure can be applied will be described.
  • the AI devices 1710a to 1710e shown in FIG. 17 can be seen as specific embodiments of the AI device 1600 shown in FIG. 16.
  • the present disclosure can have various advantageous effects.
  • a wireless device can know whether to monitor physical downlink control channel (PDCCH) monitoring occasion based on group identifier (ID) and/or beam index received in the first PDCCH monitoring occasion.
  • PDCCH physical downlink control channel
  • ID group identifier
  • the wireless device can save power consumption by not monitoring the PDCCH monitoring occasion.
  • the beam index is received in the first PDCCH monitoring occasion in a paging occasion (PO), it is not expected that best beam is changed between the first PDCCH monitoring occasion and the PDCCH monitoring occasion of associated beam in the PO.
  • PO paging occasion
  • the wireless device can only monitor the PDCCH monitoring occasion of associated beam in the PO. That is, the wireless device does not need to monitor entire PO.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention se rapporte à un procédé et à un appareil destinés à améliorer une procédure de radiomessagerie sur la base d'un signal d'économie d'énergie dans un système de communication sans fil. Un dispositif sans fil calcule une occasion de radiomessagerie sur la base d'un identifiant (ID) du dispositif sans fil, surveille une première occasion de surveillance de canal de commande de liaison descendante physique (PDCCH) dans le PO, reçoit un signal d'économie d'énergie comprenant des informations sur un ID de groupe dans la première occasion de surveillance de PDCCH par l'intermédiaire de multiples faisceaux, et surveille des occasions de surveillance PDCCH restantes dans le PO sur la base de l'ID de groupe comprenant l'ID du dispositif sans fil. Autrement dit, lorsque l'ID de groupe comprenant l'ID du dispositif sans fil, le dispositif sans fil surveille des occasions de surveillance de PDCCH restantes dans le PO.
PCT/KR2019/013116 2018-10-05 2019-10-07 Amélioration d'une procédure de radiomessagerie WO2020071880A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2018-0118706 2018-10-05
KR10-2018-0118700 2018-10-05
KR20180118700 2018-10-05
KR20180118706 2018-10-05

Publications (1)

Publication Number Publication Date
WO2020071880A1 true WO2020071880A1 (fr) 2020-04-09

Family

ID=70055610

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2019/013116 WO2020071880A1 (fr) 2018-10-05 2019-10-07 Amélioration d'une procédure de radiomessagerie

Country Status (1)

Country Link
WO (1) WO2020071880A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220124672A1 (en) * 2020-10-20 2022-04-21 Qualcomm Incorporated Page indication for idle or inactive state user equipment (ue)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180027522A1 (en) * 2016-07-20 2018-01-25 Lg Electronics Inc. Method and apparatus for transmitting beam-fored paging based on feedback in wireless communication system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180027522A1 (en) * 2016-07-20 2018-01-25 Lg Electronics Inc. Method and apparatus for transmitting beam-fored paging based on feedback in wireless communication system

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
ERICSSON: "Increasing the paging capacity without increasing the ''false'' page detection rate", R2-1812284, 3GPP TSG-RAN WG2 #103, 10 August 2018 (2018-08-10), XP051521891 *
HUAWEI ET AL.: "Considerations on the mapping between PDCCH occasion and beam for OSI", R2-1810126, 3GPP TSG RAN WG2 MEETING #AH-1807, 22 June 2018 (2018-06-22), XP051525936 *
INTERDIGITAL INC: "Paging procedure in NR-U", R2-1811457, 3GPP TSG-RAN WG2 MEETING #103, 9 August 2018 (2018-08-09), XP051521112 *
VIVO: "Not introduce for first PDCCH monitoring occasion indication for paging", R2-1811769, 3GPP TSG-RAN WG2 MEETING #103, 10 August 2018 (2018-08-10), XP051521408 *
VIVO: "Paging enhancements for NR-U", R2-1811792, 3GPP TSG-RAN WG2 MEETING #103, 10 August 2018 (2018-08-10), XP051521431 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220124672A1 (en) * 2020-10-20 2022-04-21 Qualcomm Incorporated Page indication for idle or inactive state user equipment (ue)

Similar Documents

Publication Publication Date Title
WO2020149650A1 (fr) Procédé et appareil de gestion de mobilité dans un système de communications sans fil
WO2020091443A1 (fr) Désactivation d'autorisation configurée et initiation d'une requête de connexion lors de la détection d'une défaillance de liaison latérale
WO2019245329A1 (fr) Appareil et procédé de réalisation d'un changement de cellule conditionnel dans un système de communication sans fil
WO2020139015A1 (fr) Procédé et appareil de gestion de mobilité dans un système de communication sans fil
WO2020036460A1 (fr) Procédé et appareil pour prendre en charge une transmission de données précoce dans un état inactif dans un système de communication sans fil
WO2019245304A1 (fr) Procédé et appareil de réalisation de changement de cellule conditionnel sur la base d'une occupation de canal dans un système de communication sans fil
WO2020032532A1 (fr) Procédé et appareil de surveillance de radiomessagerie sur des bandes sans licence dans un système de communication sans fil
WO2020149575A1 (fr) Gestion de ressources de liaison latérale pour une communication v2x basée sur un partage de cu-du
WO2020222592A1 (fr) Procédé et appareil de gestion de liaison directe dans un système de communication sans fil
WO2020166952A1 (fr) Procédé et appareil pour rapport de mesure dans un système de communication sans fil
WO2020166872A1 (fr) Procédé et appareil pour contrôler une procédure de transmission de données précoces dans un système de communication sans fil
WO2020067756A1 (fr) Resélection de cellule par réglage d'un paramètre de resélection de cellule
WO2020166819A1 (fr) Paramétrage de cellules rapide à des fins de double connectivité
WO2020071878A1 (fr) Gestion de ressources pour v2x nr à base de division cu-du
WO2019240527A1 (fr) Procédé et appareil pour gérer des priorités de fréquence héritées d'autres technologies d'accès radio dans un système de communication sans fil
WO2019221530A1 (fr) Procédé et appareil de rejet de données parmi des tampons de transmission associés dans un système de communication sans fil
WO2020263051A1 (fr) Procédé et appareil permettant de gérer une mobilité dans une double connectivité dans un système de communication sans fil
WO2020197125A1 (fr) Procédé et appareil d'exécution de mesurage dans un système de communications sans fil
WO2020159287A1 (fr) Procédé et appareil permettant de gérer des porteurs sur la base d'un niveau de congestion dans un système de communication sans fil
WO2022139216A1 (fr) Procédé et appareil de resélection de cellule dans un système de communication sans fil
WO2021153954A1 (fr) Procédé et appareil de réalisation de mesures dans un système de communications sans fil
WO2021029647A1 (fr) Procédé et appareil de mesure dans un système de communication sans fil
WO2020197249A1 (fr) Contrôle de communication de cellule source pour double mobilité de pile de protocoles
WO2020153807A1 (fr) Procédé et appareil de régulation de la charge et de la mobilité dans un système de communication sans fil
WO2020231224A1 (fr) Procédé et appareil permettant de gérer un rétablissement de connexion dans un système de communication sans fil

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19869057

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19869057

Country of ref document: EP

Kind code of ref document: A1