WO2023013951A1 - 하향링크 제어 채널을 송수신하는 방법 및 이를 위한 장치 - Google Patents
하향링크 제어 채널을 송수신하는 방법 및 이를 위한 장치 Download PDFInfo
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- WO2023013951A1 WO2023013951A1 PCT/KR2022/010960 KR2022010960W WO2023013951A1 WO 2023013951 A1 WO2023013951 A1 WO 2023013951A1 KR 2022010960 W KR2022010960 W KR 2022010960W WO 2023013951 A1 WO2023013951 A1 WO 2023013951A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
- H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/02—Power saving arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] 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 leader and terminal is follower
- H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower using a pre-established activity schedule, e.g. traffic indication frame
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] 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
- H04W52/0235—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 where the received signal is a power saving command
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
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- 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 a method for transmitting and receiving a downlink control channel and an apparatus therefor, and more specifically, to a Discontinuous Reception (DRX) activation of DCI (Downlink Control Information) for a wake up signal. It relates to a method for transmitting and receiving within an active time and an apparatus therefor.
- DRX Discontinuous Reception
- next-generation 5G system which is an improved wireless broadband communication than the existing LTE system
- NewRAT communication scenarios are divided into Enhanced Mobile BroadBand (eMBB)/Ultra-reliability and low-latency communication (URLLC)/Massive Machine-Type Communications (mMTC).
- eMBB Enhanced Mobile BroadBand
- URLLC low-latency communication
- mMTC Massive Machine-Type Communications
- eMBB is a next-generation mobile communication scenario having characteristics such as High Spectrum Efficiency, High User Experienced Data Rate, and High Peak Data Rate
- URLLC is a next-generation mobile communication scenario having characteristics such as Ultra Reliable, Ultra Low Latency, and Ultra High Availability.
- V2X Emergency Service, Remote Control
- mMTC is a next-generation mobile communication scenario with Low Cost, Low Energy, Short Packet, and Massive Connectivity characteristics. (e.g., IoT).
- the present disclosure is to provide a method for transmitting and receiving a downlink control channel and an apparatus therefor.
- first information related to discontinuous reception (DRX) is received, and based on the first information, DRX A timer for active time is running, and second information related to PDCCH (Physical Downlink Control Channel) monitoring adaptation is received based on the DRX active time, and the second information
- PDCCH monitoring adaptation is performed during a certain period, and a PDCCH monitoring opportunity (Monitoring Occasion) for a wake-up signal (WUS) is included in a period in which the DRX active time and the certain period overlap.
- WUS wake-up signal
- the overlapping period may not be regarded as the DRX active time.
- the DCI may be received even though the overlapping period is regarded as the DRX active time.
- the DCI may be received based on a radio network temporary identifier (PS-RNTI).
- PS-RNTI radio network temporary identifier
- the DCI may be received based on a radio network temporary identifier (C-RNTI) and may have a format different from DCI format 2_6.
- C-RNTI radio network temporary identifier
- the PDCCH monitoring opportunity may correspond to Type3-PDCCH Common Search Space (CSS).
- CSS Common Search Space
- a terminal for receiving DCI Downlink Control Information
- at least one transceiver at least one processor; and at least one memory operably coupled to the at least one processor and storing instructions which, when executed, cause the at least one processor to perform an operation, the operation comprising: Through a transceiver, first information related to DRX (Discontinuous Reception) is received, based on the first information, a timer for DRX active time is running, and through the at least one transceiver , based on the DRX active time, receives second information related to PDCCH (Physical Downlink Control Channel) monitoring adaptation, performs PDCCH monitoring adaptation for a certain period based on the second information, and Based on the fact that a PDCCH monitoring opportunity for a wake-up signal (WUS) is included in a period in which the DRX active time and the predetermined period overlap, the PDCCH monitoring opportunity is provided through the at least one transceiver. It may include receiving D
- the overlapping period may not be regarded as the DRX active time.
- the DCI may be received even though the overlapping period is regarded as the DRX active time.
- the DCI may be received based on a radio network temporary identifier (PS-RNTI).
- PS-RNTI radio network temporary identifier
- the DCI may be received based on a radio network temporary identifier (C-RNTI) and may have a format different from DCI format 2_6.
- C-RNTI radio network temporary identifier
- the PDCCH monitoring opportunity may correspond to Type3-PDCCH Common Search Space (CSS).
- CSS Common Search Space
- an apparatus for receiving downlink control information comprising: at least one processor; and at least one memory operatively connected to the at least one processor and storing instructions which, when executed, cause the at least one processor to perform an operation, the operation including: Discontinuous Reception (DRX) ), and based on the first information, a timer for DRX active time is running, and based on the DRX active time, PDCCH (Physical Downlink Control Channel) Receive second information related to monitoring adaptation, perform PDCCH monitoring adaptation for a certain interval based on the second information, and perform WUS (Wake- It may include receiving the DCI including the WUS through the PDCCH monitoring opportunity based on the included PDCCH monitoring opportunity (Monitoring Occasion) for up Signal).
- DCI downlink control information
- a computer-readable storage medium including at least one computer program that causes at least one processor according to the present disclosure to perform an operation, the operation comprising: receiving first information related to DRX (Discontinuous Reception), and performing the first Based on the information, a timer for DRX active time is running, and based on the DRX active time, second information related to PDCCH (Physical Downlink Control Channel) monitoring adaptation is received Based on the second information, PDCCH monitoring adaptation is performed for a certain period, and a PDCCH monitoring opportunity (Monitoring Occasion) for a wake-up signal (WUS) is provided within a period in which the DRX active time and the certain period overlap. Based on what is included, it may include receiving the DCI including the WUS through the PDCCH monitoring opportunity.
- DRX Discontinuous Reception
- PDCCH Physical Downlink Control Channel
- first information related to discontinuous reception (DRX) is transmitted, and DRX active time based on the first information
- second information related to PDCCH (Physical Downlink Control Channel) monitoring adaptation is transmitted, and a certain period in which the PDCCH monitoring adaptation is performed based on the DRX active time and the second information is overlapped.
- PDCCH Physical Downlink Control Channel
- a base station for transmitting DCI comprising: at least one transceiver; at least one processor; and at least one memory operably coupled to the at least one processor and storing instructions which, when executed, cause the at least one processor to perform an operation, the operation comprising: Through a transceiver, first information related to DRX (Discontinuous Reception) is transmitted, and based on a DRX activation time based on the first information, through the at least one transceiver, a Physical Downlink Control Channel (PDCCH) monitoring adaptation (monitoring) PDCCH monitoring opportunity for WUS (Wake-up Signal) within a period in which second information related to adaptation) is transmitted, and a certain period in which the PDCCH monitoring adaptation is performed based on the DRX active time and the second information overlaps Monitoring Occasion) may include transmitting the DCI including the WUS through the PDCCH monitoring opportunity through the at least one transceiver.
- PDCH Physical Downlink Control Channel
- the DCP DCI with CRC scrambled by PS-RNTI
- the DCP Occasion allocated within the DRX Active Time is located within the application period of the PDCCH monitoring adaptation, it is appropriately determined whether to monitor the DCP Occasion, Improvements in power consumption efficiency can be expected.
- 1 and 2 are diagrams for explaining an idle mode DRX (Discontinuous Reception) operation.
- 3 to 5 are diagrams for explaining a DRX operation in a Radio Resource Control (RRC) Connected mode.
- RRC Radio Resource Control
- 6 to 7 are diagrams for explaining a method of monitoring DCI format 2_6.
- FIG 8 to 10 are views for explaining overall operation processes of a terminal and a base station according to an embodiment of the present disclosure.
- 11 and 12 are diagrams for explaining a method of monitoring DCI format 2_6 according to an embodiment of the present disclosure.
- FIG. 13 illustrates a communication system applied to the present disclosure.
- FIG. 16 illustrates an XR (eXtended Reality) device that can be applied to the present disclosure.
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency division multiple access
- CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
- TDMA may be implemented with a radio technology such as Global System for Mobile communications (GSM)/General Packet Radio Service (GPRS)/Enhanced Data Rates for GSM Evolution (EDGE).
- GSM Global System for Mobile communications
- GPRS General Packet Radio Service
- EDGE Enhanced Data Rates for GSM Evolution
- OFDMA may be implemented with radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and Evolved UTRA (E-UTRA).
- UTRA is part of the Universal Mobile Telecommunications System (UMTS).
- 3rd Generation Partnership Project (3GPP) long term evolution (LTE) is a part of Evolved UMTS (E-UMTS) using E-UTRA
- LTE-Advanced (LTE-A) is an evolved version of 3GPP LTE.
- 3GPP New Radio or New Radio Access Technology (NR) is an evolved version of 3GPP LTE/LTE-A.
- the three main requirement areas for 5G are (1) Enhanced Mobile Broadband (eMBB) area, (2) Massive Machine Type Communication (mMTC) area, and (3) Hyper-reliability and It includes the 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 goes far beyond basic mobile internet access, and covers rich interactive work, media and entertainment applications in the cloud or augmented reality.
- Data is one of the key drivers of 5G, and we may not see dedicated voice services for the first time in the 5G era.
- voice is expected to be handled as an application simply using the data connection provided by the communication system.
- the main causes for the increased traffic volume are the increase in content size and the increase in the number of applications requiring high data rates.
- Streaming services (audio and video), interactive video and mobile internet connections will become more widely used as more devices connect to the internet. Many of these applications require always-on connectivity to push real-time information and notifications to users.
- Cloud storage and applications are rapidly growing in mobile communication platforms, which can be applied to both work and entertainment.
- cloud storage is a special use case that drives the growth of uplink data transmission rate.
- 5G is also used for remote work in the cloud, requiring much lower end-to-end latency to maintain a good user experience when tactile interfaces are used.
- Entertainment Cloud gaming and video streaming are another key factor driving the demand for mobile broadband capabilities. Entertainment is essential on smartphones and tablets anywhere including in highly mobile environments such as trains, cars and airplanes.
- Another use case is augmented reality for entertainment and information retrieval.
- augmented reality requires very low latency and instantaneous amount of data.
- URLLC includes new services that will change the industry through ultra-reliable/available low-latency links such as remote control of critical infrastructure and self-driving vehicles. This level of reliability and latency is essential for smart grid control, industrial automation, robotics, and drone control and coordination.
- 5G can complement fiber-to-the-home (FTTH) and cable-based broadband (or DOCSIS) as a means of delivering streams rated at hundreds of megabits per second to gigabits per second. These high speeds are required to deliver TV with resolutions above 4K (6K, 8K and beyond) as well as virtual and augmented reality.
- Virtual Reality (VR) and Augmented Reality (AR) applications include mostly immersive sports competitions. Certain applications may require special network settings. For example, in the case of VR games, game companies may need to integrate their core servers with the network operator's edge network servers to minimize latency.
- Automotive is expected to be an important new driver for 5G, with many use cases for mobile communications on vehicles. For example, entertainment for passengers requires simultaneous high-capacity and high-mobility mobile broadband. The reason is that future users will continue to expect high-quality connections regardless of their location and speed.
- Another use case in the automotive sector is augmented reality dashboards. It identifies objects in the dark over what the driver sees through the front window, and overlays information that tells the driver about the object's distance and movement.
- wireless modules will enable communication between vehicles, exchange of information between vehicles and supporting infrastructure, and exchange of information between vehicles and other connected devices (eg devices carried by pedestrians).
- a safety system can help reduce the risk of an accident by guiding the driver through alternate courses of action to make driving safer.
- the next step will be remotely controlled or self-driven vehicles. This requires very reliable and very fast communication between different self-driving vehicles and between the vehicle and the infrastructure. In the future, self-driving vehicles will perform all driving activities, leaving drivers to focus only on traffic anomalies that the vehicle itself cannot identify. The technical requirements of self-driving vehicles require ultra-low latency and ultra-high reliability to increase traffic safety to levels that are unattainable by humans.
- Smart cities and smart homes will be embedded with high-density wireless sensor networks.
- a distributed network of intelligent sensors will identify conditions for cost and energy-efficient maintenance of a city or home.
- a similar setup can be done for each household.
- Temperature sensors, window and heating controllers, burglar alarms and appliances are all connected wirelessly. Many of these sensors are typically low data rates, low power and low cost.
- real-time HD video for example, may be required in certain types of devices for surveillance.
- a smart grid interconnects these sensors using digital information and communication technologies to gather information and act on it. This information can include supplier and consumer behavior, allowing the smart grid to improve efficiency, reliability, affordability, sustainability of production and distribution of fuels such as electricity in an automated manner.
- the smart grid can also be viewed as another low-latency sensor network.
- the health sector has many applications that can benefit from mobile communications.
- the communication system may support telemedicine, which provides clinical care at a remote location. This can help reduce barriers to distance and improve access to health services that are not consistently available in remote rural areas. It is also used to save lives in critical care and emergencies.
- a mobile communication based wireless sensor network 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 is expensive to install and maintain. Thus, the possibility of replacing cables with reconfigurable wireless links is an attractive opportunity in many industries. However, achieving this requires that wireless connections operate with cable-like latency, reliability and capacity, and that their management be simplified. Low latency and very low error probability are the new requirements that need to be connected with 5G.
- Logistics and freight tracking are important use cases for mobile communications that use location-based information systems to enable tracking of inventory and packages from anywhere.
- Logistics and freight tracking use cases typically require low data rates, but wide range and reliable location information.
- the UE uses Discontinuous Reception (DRX) in the RRC_IDLE and RRC_INACTIVE states to reduce power consumption.
- DRX Discontinuous Reception
- the UE performs a DRX operation according to DRX configuration information.
- a UE operating based on DRX repeats ON/OFF for a reception operation. For example, when DRX is configured, the UE attempts PDCCH reception/detection (eg, PDCCH monitoring) only at a predetermined time interval (eg, ON), and the remaining time (eg, OFF/Sleep) does not attempt PDCCH reception.
- PDCCH reception/detection eg, PDCCH monitoring
- a predetermined time interval eg, ON
- the remaining time eg, OFF/Sleep
- On-duration the time for the UE to attempt PDCCH reception is called On-duration, and On-duration is defined once per DRX cycle.
- the UE may receive DRX configuration information from a base station (eg, gNB) through RRC signaling and perform a DRX operation through (Long) DRX command MAC CE reception.
- a base station eg, gNB
- DRX configuration information may be included in MAC-CellGroupConfig.
- IE MAC-CellGroupConfig is used to configure MAC parameters for a cell group including DRX.
- Discontinuous Reception refers to an operation mode in which a User Equipment (UE) discontinuously receives/monitors a downlink channel so that the UE can reduce battery consumption. That is, a UE configured with DRX can reduce power consumption by discontinuously receiving downlink signals.
- the DRX operation is performed in a DRX cycle representing a time interval at which On Duration is periodically repeated.
- DRX includes On Duration and Sleep Duration (or Opportunity for DRX).
- On Duration represents a time interval during which the UE monitors the PDCCH to receive the PDCCH.
- DRX may be performed in Radio Resource Control (RRC)_IDLE State (or mode), RRC_INACTIVE State (or mode), or RRC_CONNECTED State (or mode). In RRC_IDLE State and RRC_INACTIVE State, DRX is used to receive paging signals discontinuously.
- RRC Radio Resource Control
- RRC_IDLE State and RRC_INACTIVE State DRX is used to receive paging signals discontinu
- RRC_Idle State A state in which a radio connection (RRC connection) is not established between the base station and the terminal.
- RRC connection A radio connection (RRC connection) is established between the base station and the terminal, but the radio connection is inactive.
- RRC_Connected state A state in which a wireless connection (RRC connection) is established between the base station and the terminal.
- DRX is basically divided into idle mode DRX, connected DRX (C-DRX), and extended DRX.
- DRX applied in RRC IDLE state is called IDLE mode DRX
- DRX applied in RRC CONNECTED state is called connection mode DRX (C-DRX).
- eDRX Extended/enhanced DRX
- eDRX Extended/enhanced DRX
- SIB1 system information
- SIB1 may include an eDRX-Allowed parameter.
- the eDRX-Allowed parameter is a parameter indicating whether IDLE mode extended DRX is allowed.
- One paging opportunity may be a time interval (eg, slot or subframe) in which a Paging-Radio Network Temporary Identifier (P-RNTI) based Physical Downlink Control Channel (PDCCH) can be transmitted. There is.
- P-RNTI Paging-Radio Network Temporary Identifier
- the P-RNTI based PDCCH may address/scheduling a paging message.
- the PO may indicate a start subframe for PDCCH repetition.
- PF paging frame
- the UE may be configured to monitor only one PO per DRX cycle.
- PF and/or PO may be determined based on DRX parameters provided through network signaling (eg, system information).
- 'PDCCH' may mean MPDCCH, NPDCCH, and/or general PDCCH.
- 'UE' will refer to MTC UE, BL (Bandwidth Reduced Low Complexity) / CE (Coverage Enhanced) UE, NB-IoT UE, RedCap (RedCap) UE, general UE, and / or IAB-MT (Mobile Termination). can .
- FIG. 1 is a flowchart illustrating an example of a method of performing an IDLE mode DRX operation.
- the UE receives IDLE mode DRX configuration information from the base station through higher layer signaling (eg, system information) (S110).
- higher layer signaling eg, system information
- the UE determines PF (Paging Frame) and PO (Paging Occasion) for monitoring the PDCCH in the paging DRX cycle based on the IDLE mode DRX configuration information (S120).
- the DRX cycle includes On Duration and Sleep Duration (or Opportunity for DRX).
- the UE monitors the PDCCH in the PO of the determined PF (S130). Meanwhile, the UE monitors only one Time Interval (PO) per paging DRX cycle.
- the time interval may be a slot or a subframe.
- the UE when the UE receives the PDCCH (more precisely, the CRC of the PDCCH) scrambled by the P-RNTI during the On Duration (ie, when paging is detected), the UE transitions to the connected mode to transmit and receive data with the base station.
- the PDCCH more precisely, the CRC of the PDCCH
- the UE transitions to the connected mode to transmit and receive data with the base station.
- FIG. 2 is a diagram illustrating an example of an IDLE mode DRX operation.
- the UE wakes up every (paging) DRX cycle and monitors the PDCCH.
- the UE transitions to the Connected state and receives data. Otherwise, the UE may enter sleep mode again.
- C-DRX is DRX applied in RRC Connected State.
- the DRX cycle of C-DRX may consist of a short DRX cycle and/or a long DRX cycle.
- a short DRX cycle is optional.
- the UE When C-DRX is configured, the UE performs PDCCH monitoring during On Duration. If there is a successfully detected PDCCH during PDCCH monitoring, the UE operates (or executes) an Inactive Timer and maintains an Awake State. On the other hand, if there is no successfully detected PDCCH during PDCCH monitoring, the UE enters a sleep state after the On Duration ends.
- PDCCH reception occasion eg, PDCCH search space/slot with candidate
- PDCCH reception occurrences eg, slots having PDCCH search spaces/candidates
- PDCCH monitoring may be limited to a time interval set as a measurement gap regardless of C-DRX configuration.
- FIG. 3 is a flowchart illustrating an example of a method of performing a C-DRX operation.
- the UE receives RRC signaling (eg, MAC-MainConfig IE) including DRX configuration information from the base station (S310).
- RRC signaling eg, MAC-MainConfig IE
- DRX configuration information may include the following information.
- - on-duration a period (Duration) in which the UE waits to receive the PDCCH after waking up. If the UE successfully decodes the PDCCH, the UE is awake and starts the drx-inactivity timer.
- DRX Cycle starting period (Duration); For example, it may mean a time interval to be continuously monitored at the beginning of a DRX cycle, and may be expressed in ms units.
- the UE restarts the drx-inactivity timer after successful decoding of PDCCH for initial transmission only, not retransmission.
- - drx-RetransmissionTimer maximum duration until DL retransmission is received in case of DL;
- the maximum duration until an acknowledgment for UL retransmission is received for example, in the case of UL, the number of slots for a bandwidth part (BWP) in which a transport block (TB) to be retransmitted is transmitted,
- BWP bandwidth part
- TB Transport Block
- - drxShortCycleTimer Duration in which the UE must follow a short DRX cycle
- delay before starting drx-onDurationTimer (delay); For example, it may be expressed in units of ms, and may be expressed in multiples of 1/32 ms.
- -Active Time The total duration (Duration) during which the UE monitors the PDCCH, including (a) "On-duration" of the DRX cycle, (b) the time during which the UE performs continuous reception while the drx-inactivity timer has not expired , and (c) a time when the UE performs continuous reception while waiting for a retransmission opportunity (Opportunity).
- the active time for the serving cell of the DRX group includes the following times.
- the UE monitors the PDCCH during the ON Duration of the DRX cycle based on the DRX configuration (S330).
- FIG. 4 is a diagram showing an example of C-DRX operation.
- the UE when the UE receives scheduling information (eg, DL Assignment or UL Grant) in the RRC_Connected State (hereinafter referred to as Connected State), the UE executes the DRX Inactivity Timer and the RRC Inactivity Timer.
- scheduling information eg, DL Assignment or UL Grant
- the UE executes the DRX Inactivity Timer and the RRC Inactivity Timer.
- DRX mode is initiated after the DRX Inactivity Timer expires.
- the UE wakes up in the DRX Cycle and monitors the PDCCH for a predetermined time (on duration timer).
- Short DRX when the UE starts the DRX mode, the UE first starts a short DRX Cycle, and after the short DRX Cycle ends, starts a long DRX Cycle.
- the long DRX cycle is a multiple of the short DRX cycle. That is, in a short DRX cycle, the UE wakes up more frequently.
- the RRC Inactivity Timer expires, the UE transitions to the Idle state and performs the Idle mode DRX operation.
- C-DRX operation was introduced for power saving of the UE. If the PDCCH is not received within the on-duration defined for each DRX cycle, the UE enters sleep mode until the next DRX cycle and does not perform transmission/reception.
- the active time may be continued (or increased) based on operations such as inactivity timer and retransmission timer. If no additional data is received within the active time, the UE may perform a sleep operation until the next DRX operation.
- WUS wake up signal
- WUS may be for notifying whether the UE should perform PDCCH monitoring in the on-duration of each DRX cycle (or a plurality of DRX cycles). If the UE does not detect WUS on a predetermined or indicated WUS occasion, it may maintain a sleep operation without performing PDCCH monitoring in one or a plurality of DRX cycles associated with the corresponding WUS.
- a PDCCH monitoring occasion for DCI format 2_6 may be determined by a ps-Offset indicated by the network and a Time Gap reported by the UE. At this time, the time gap reported by the terminal can be interpreted as a preparation period required for operation after the terminal wakes up.
- the base station may instruct the terminal to configure a search space (SS) set capable of monitoring DCI format 2_6.
- SS search space
- DCI format 2_6 may be instructed to be monitored through consecutive slots as long as the duration at monitoring periodicity intervals.
- DCI format 2_6 can be monitored by the start point of the DRX cycle (eg, the point where the on-duration timer starts) and the ps-Offset configured by the base station. A monitoring window is determined. In addition, PDCCH monitoring may not be required in the Time Gap interval reported by the UE. Finally, the SS Set monitoring occasion for performing actual monitoring by the UE may be determined as the first Full Duration within the monitoring window (ie, Actual Monitoring Occasions in FIG. 6 ).
- switching of an SS set is defined.
- two SS Set Groups are configured for the UE, and an SS Set Group to be monitored by the UE may be indicated among the two SS Set Groups.
- the terminal monitors the SS Sets included in the corresponding SS Set Group according to the corresponding instruction, and may skip monitoring of the SS Sets not included in the corresponding SS Set Group.
- a list of SS Set Groups consisting of a Type 3-PDCCH Common Search Space (CSS) set and/or User Specific Search Space (USS) set may be provided to the terminal.
- the UE can monitor SS Sets corresponding to group index #0.
- the terminal may perform SS Set Group Switching operation according to whether SearchSpaceSwitchTrigger is set.
- the terminal may switch the SS Set Group according to the DCI Format 2_0 instruction.
- the terminal starts monitoring SS Set Group #0 after a certain time from receiving DCI Format 2_0, and SS Set Group #1 monitoring can be discontinued.
- the UE starts monitoring SS Set Group #1 after a certain time from receiving DCI Format 2_0, and monitors SS Set Group #0. can stop If the UE starts monitoring SS Set Group #1, the UE may start counting the timer set by SearchSpaceSwitchTimer. If the corresponding timer expires, the terminal may start monitoring SS Set Group #0 and stop monitoring SS Set Group #1 after a predetermined time from when the timer expires.
- the UE may change the SS Set Group according to DCI reception. For example, if the terminal receives DCI while monitoring SS Set Group #0 (or SS Set Group #1), the terminal receives the DCI after a certain time, SS Set Group #1 (or SS Set Group #1). Monitoring of SS Set Group #0) may be started, and monitoring of SS Set Group #0 (or SS Set Group #1) may be stopped. At this time, the terminal may start counting the timer set by SearchSpaceSwitchTimer.
- the terminal If the corresponding timer expires, the terminal starts monitoring SS Set Group #0 (or SS Set Group #1) after a certain time from the time the timer expires, and SS Set Group #1 (or SS Set Group #1). You can stop monitoring of Set Group #0).
- XR Extended Reality
- AR Augmented Reality
- VR Virtual Reality
- MR Magnetic Reality
- the characteristic of XR is that the time at which traffic can be expected to be received is fixed by fps (frame per second), and it can be received late or early due to the effect of jitter.
- the jitter of this XR traffic appears as a truncated Gaussian probability distribution. Therefore, it is possible to describe the power saving effect by periodically setting DRX according to fps.
- PDCCH monitoring adaptation is set even if DRX is not set, a power saving effect can be expected only with PDCCH monitoring adaptation.
- a power saving effect can be expected by setting both DRX and PDCCH monitoring adaptation.
- the expected time of traffic reception and the expected time of reception due to the effect of jitter can be expressed as a probability, and the embodiments described below can be applied to expect a power saving effect in the XR environment as described above.
- SS set group #0 can be set to an SS set group that includes an SS set for dense PDCCH monitoring
- SS set group #1 can be set to an SS set group that includes an SS set for sparse PDCCH monitoring.
- the SS Set Group Switching operation may be configured in consideration of jitter in XR.
- the terminal may perform PDCCH monitoring for a short period in which the probability of traffic reception is high due to the high probability of jitter, and then repeat the operation of micro-sleep.
- PDCCH monitoring skipping operation may be configured in consideration of jitter in XR.
- a UE for which a DRX operation is instructed monitors a PDCCH at a DCP (DCI with CRC scrambled by PS-RNTI) occasion included in a Physical Downlink Control Channel (PDCCH) monitoring adaptation interval indicated within the DRX Active Time. Suggest terminal operation.
- DCP DCI with CRC scrambled by PS-RNTI
- PDCCH Physical Downlink Control Channel
- SS (Search Space) sets can be set per one BWP for the terminal.
- the UE may monitor PDCCH candidates included in SS sets (hereinafter referred to as SS set monitoring).
- PDCCH monitoring during DRX operation accounts for a large portion of power consumption.
- a terminal adjusts the number of PDCCH monitoring to reduce power consumption within DRX active time PDCCH monitoring It is being discussed about monitoring adaptation.
- PDCCH monitoring adaptation may mean an operation for reducing the number of times of PDCCH monitoring.
- PDCCH monitoring adaptation examples include PDCCH monitoring skipping (hereinafter referred to as skipping) and SS set group switching (hereinafter referred to as switching).
- PDCCH monitoring skipping is to stop PDCCH monitoring for a certain period (eg, PDCCH monitoring skipping duration), classify SS Sets configured with SSSG (Search Space Set Group) Switching into a plurality of groups, and among the plurality of groups , Instruct switching for one group according to the purpose of use to monitor the SS Set included in the group.
- PDCCH monitoring skipping is to stop PDCCH monitoring for a certain period (eg, PDCCH monitoring skipping duration), classify SS Sets configured with SSSG (Search Space Set Group) Switching into a plurality of groups, and among the plurality of groups , Instruct switching for one group according to the purpose of use to monitor the SS Set included in the group.
- SSSG Search Space Set Group
- SSSG is divided into SSSG #0 and SSSG #1.
- SSSG#0 is an SSSG that includes a relatively large number of SS sets or has a relatively short cycle in order to increase the number of PDCCH monitoring when the expected data transmission amount is large
- SSSG#1 is In order to reduce the number of PDCCH monitoring for the purpose of power saving, a relatively small number of SS sets are included or the included SS sets have a relatively long cycle.
- the base station may use various DCI formats to instruct the terminal with information related to PDCCH monitoring adaptation (monitoring adaptation).
- the terminal may monitor a physical downlink control channel (PDCCH) according to a PDCCH monitoring adaptation operation according to the corresponding instruction.
- PDCH physical downlink control channel
- DCI downlink control information
- DCI format 2_6 is used for notifying the power saving information outside DRX Active Time for one or more UEs.
- the following information is transmitted by means of the DCI format 2_6 with CRC scrambled by PS-RNTI: - block number 1, block number 2, ⁇ , block number N where the starting position of a block is determined by the parameter ps-PositionDCI-2-6 provided by higher layers for the UE configured with the block.
- one block is configured for the UE by higher layers, with the following fields defined for the block: - Wake-up indication - 1 bit - SCell dormancy indication - 0 bit if higher layer parameter Scell-groups-for-dormancy-outside-active-time is not configured; otherwise 1, 2, 3, 4 or 5 bits bitmap determined according to higher layer parameter Scell-groups-for-dormancy-outside-active-time, where each bit corresponds to one of the SCell group(s) configured by higher layers parameter Scell-groups-for-dormancy-outside-active-time, with MSB to LSB of the bitmap corresponding to the first to last configured SCell group.
- the size of DCI format 2_6 is indicated by the higher layer parameter sizeDCI-2-6 , according to Clause 10.3 of TS 38.213.
- DCI format 2_6 used as a wake up signal may be expressed as DCP (DCI with CRC scrambled by PS-RNTI) in the present disclosure. Accordingly, a PDCCH monitoring occasion for DCI format 2_6 may be expressed as a DCP occasion.
- DCP is not interpreted limitedly to DCI format 2_6. For example, if it is DCI for notifying whether DRX Active Time wakes up, it can be interpreted as DCP even if it is not DCI format 2_6.
- DCP when notifying whether or not DRX Active Time wakes up through a DCI format other than DCI format 2_6, DCP may mean another DCI format indicating whether or not to wake up.
- the location of the DCP occasion may be determined based on the DRX cycle of the UE as described in FIG. 6 .
- the wake-up operation of the terminal according to this may appear as shown in FIG. 7(a).
- the DCP occasion is simply expressed as a dot, but the actual DCP occasion (ie, PDCCH monitoring occasion) is the same as described in FIG. 6.
- the terminal determines the drx-onDurationTimer in the next DRX cycle. It is decided whether to start For example, if the Wake-up indication field is 0, "Not Wake-up” is indicated, and drx-onDurationTimer does not start in the next DRX cycle. On the other hand, if the Wake-up indication field is 1, "Wake-up” is indicated, and drx-onDurationTimer starts in the next DRX cycle.
- DCP eg, DCI format 2_6
- the terminal determines the drx-onDurationTimer in the next DRX cycle. It is decided whether to start For example, if the Wake-up indication field is 0, "Not Wake-up” is indicated, and drx-onDurationTimer does not start in the next DRX cycle. On the other hand, if the Wake-up indication field is 1, "Wake-up” is indicated, and drx-onDurationTimer starts in the next DRX cycle.
- DRX Active Time is defined as shown in Table 2 below.
- the Active Time for Serving Cells in a DRX group includes the time while: - drx-onDurationTimer or drx-InactivityTimer configured for the DRX group is running; or - drx-RetransmissionTimerDL or drx-RetransmissionTimerUL is running on any Serving Cell in the DRX group; or - ra-ContentionResolutionTimer (as described in clause 5.1.5) or msgB-ResponseWindow (as described in clause 5.1.4a) is running; or - a Scheduling Request is sent on PUCCH and is pending (as described in clause 5.4.4); or - a PDCCH indicating a new transmission addressed to the C-RNTI of the MAC entity has not been received after successful reception of a Random Access Response for the Random Access Preamble not selected by the MAC entity among the contention-based Random Access Preamble (as described in clauses 5.1.4 and 5.1.4a).
- the terminal starts drx-onDurationTimer to perform the DRX Active Time, and then the DRX Active Time may increase as defined in [Table 2]. That is, when the timers defined in [Table 2] operate, the DRX Active Time can be extended. Meanwhile, at least one SS set capable of monitoring the DCP is configured in the UE, and at least one SS set may be repeated according to a predetermined period.
- the DCP occasion is repeated at regular intervals, and when the DRX Active Time is extended, the DCP occasion and the DRX Active Time may overlap. In other words, DCP Occasion may be included within the extended DRX Active Time.
- the UE does not perform PDCCH monitoring for the DCP occasion included in the DRX Active Time, and drx-onDurationTimer for the next DRX cycle is always set to start. For example, referring to FIG. 7(b), since a new DL transmission is received while drx-onDurationTimer is in progress, the operation of drx-InactivityTimer starts and the DRX Active Time can be extended based on drx-InactivityTimer .
- the extended DRX Active Time may include a DCP Occasion allocated prior to the drx-onDurationTimer of the next DRX Cycle.
- DCP Occasion is defined as not being monitored within the DRX Active Time in the current standard, the terminal may not perform monitoring for the DCP Occasion included in the extended DRX Active Time.
- the UE since the UE does not monitor the DCP Occasion, it is not known whether Wake-up is performed in the next DRX Cycle corresponding to the corresponding DCP Occasion. Wake-up of the next DRX cycle can be defined through the RRC parameter ps-WakeUp .
- drx-onDurationTimer of the next DRX Cycle can be started to start DRX Active Time. If ps-WakeUp is absent, if DCP is not detected, drx-onDurationTimer is started in the next DRX Cycle. I never do that.
- PDCCH monitoring adaptation for adjusting PDCCH monitoring within DRX Active Time.
- PDCCH monitoring skipping is included in which PDCCH monitoring is stopped for a certain period of time (eg, a PDCCH monitoring skipping duration).
- the duration of PDCCH skipping may be set to one or more of one or more symbols, one or more slots, or all remaining DRX Active Time of the current DRX cycle (skipping to the next DRX cycle).
- the UE's PDCCH monitoring operation is not defined. did not
- an operation of a UE for monitoring a PDCCH at a DCP occasion included in a period in which a PDCCH monitoring adaptation is applied is proposed by a UE for which C-DRX operation is indicated.
- a definition of the DRX Active Time of the duration to which PDCCH monitoring adaptation is applied and UE operation according to each definition are proposed.
- the operation of the UE for each PDCCH monitoring adaptation that can be indicated and the operation of the UE when PDCCH monitoring of the UE is impossible at a DCP occasion are proposed.
- the present disclosure describes a method proposed based on C-DRX applied to a terminal in an RRC_CONNECTED state, but is not limited thereto.
- other methods eg, DRX applied to a terminal in an RRC_IDLE state
- a certain period in which a terminal does not have to expect reception of a DL (Downlink) signal can be defined with periodicity.
- a base station may instruct/configure UE operation when C-DRX operation and DCP occasion are located within a PDCCH monitoring adaptation duration for a UE in an RRC_CONNECTED state. Through this, it is possible to improve power saving efficiency of the terminal and reduce transmission/reception latency of control/traffic information.
- a method in which a UE receives information related to a PDCCH monitoring operation on a DCP occasion from a base station, and based on this, receives a PDCCH through SS set (s) of a DCP occasion, and a UE instructed/configured in this regard Actions may be included.
- the base station determines and configures information related to the PDCCH monitoring operation at the DCP occasion, informs the UE of the information, and transmits positions of PDCCH, PDSCH (Physical Downlink Shared Channel) and/or PUSCH (Physical Uplink Shared Channel) based on the information.
- a method for determining may be included.
- the proposed method may include a process in which a terminal transmits a signal and a channel for informing its capability, and the base station receives it.
- FIG. 8 is a diagram for explaining an overall operation process of a terminal according to the proposed methods of the present disclosure.
- a terminal may transmit capability information and/or UE assistance information to a base station in order to support an operation proposed in the present disclosure (S801).
- the performance information and/or UE assistance information may include information for determining a PDCCH monitoring operation in DCP Occasion.
- S801 may be omitted in a specific situation (eg, when the base station already has prior information or when each operation method is changed due to the need of the base station).
- the terminal may receive first information for configuring a PDCCH monitoring operation transmitted by the base station in order to support the operation proposed in the present disclosure (S803).
- the first information may be received using a higher layer signal (eg, System Information Block (SIB) or RRC signaling).
- SIB System Information Block
- RRC Radio Resource Control
- the first information may be for configuring PDCCH monitoring adaptation or may be for configuring a DCP monitoring operation in a PDCCH monitoring adaptation interval.
- the first information may be based on at least one of [Method 1] to [Method 3].
- the first information is a method for specifically indicating one of PDCCH monitoring operation-related configurations in a plurality of DCP occasions (semi-)statically provided to the terminal (eg, DCI or MAC CE) It can also be received through /header).
- the terminal may receive second information indicating PDCCH monitoring adaptation based on the first information configured through the higher layer signal (S805).
- the second information may be included in DCI.
- the corresponding DCI may be included in a Physical Downlink Control Channel (PDCCH).
- the PDCCH monitoring adaptation operation indicated by the second information may be based on at least one of [Method 1] to [Method 3].
- the UE may receive the PDCCH in the DCP Occasion based on the second information and perform decoding of the PDCCH (S807).
- PDCCH received in DCP Occasion may include a wake-up signal.
- the operation of the terminal according to the above-described S803 to S807 may be based on at least one of [Method 1] to [Method 3].
- FIG. 9 is a diagram for explaining an overall operation process of a base station according to the proposed methods of the present disclosure.
- a base station may receive terminal capability information and/or UE assistance information from a terminal in order to support an operation proposed in the present disclosure (S901).
- the performance information and/or UE assistance information may include information for determining a PDCCH monitoring operation in DCP Occasion.
- S901 may be omitted in a specific situation (eg, when the base station already has prior information or when each operation method is changed due to the need of the base station).
- the base station may transmit first information for configuring a PDCCH monitoring operation to support the operation proposed in the present disclosure (S903).
- the first information may be transmitted using a higher layer signal (eg, System Information Block (SIB) or RRC signaling).
- SIB System Information Block
- RRC Radio Resource Control
- the first information may be for configuring PDCCH monitoring adaptation or may be for configuring a DCP monitoring operation in a PDCCH monitoring adaptation interval.
- the first information may be based on at least one of [Method 1] to [Method 3].
- the first information is a method for specifically indicating one of PDCCH monitoring operation-related configurations in a plurality of DCP occasions (semi-)statically provided to the terminal (eg, DCI or MAC CE) /header).
- the base station may transmit second information indicating PDCCH monitoring adaptation based on the first information configured through the higher layer signal (S905).
- the second information may be included in DCI.
- the corresponding DCI may be included in a Physical Downlink Control Channel (PDCCH).
- the PDCCH monitoring adaptation operation indicated by the second information may be based on at least one of [Method 1] to [Method 3].
- the base station may transmit PDCCH in DCP Occasion based on the second information (S907).
- PDCCH received in DCP Occasion may include a wake-up signal.
- the operation of the base station according to the above-described S903 to S907 may be based on at least one of [Method 1] to [Method 3].
- FIG. 10 is a diagram for explaining an overall operation process of a network according to the proposed methods of the present disclosure.
- a UE may transmit capability information and/or UE assistance information to a base station in order to support an operation proposed in the present disclosure (S1001).
- the performance information and/or UE assistance information may include information for determining a PDCCH monitoring operation in DCP Occasion.
- S1001 may be omitted in a specific situation (eg, when the base station already has prior information or when each operation method is changed due to the need of the base station).
- the base station may transmit first information for configuring a PDCCH monitoring operation to the terminal in order to support the operation proposed in the present disclosure (S1003).
- the first information may be transmitted using a higher layer signal (eg, System Information Block (SIB) or RRC signaling).
- SIB System Information Block
- RRC Radio Resource Control
- the first information may be for configuring PDCCH monitoring adaptation or may be for configuring a DCP monitoring operation in a PDCCH monitoring adaptation interval.
- the first information may be based on at least one of [Method 1] to [Method 3].
- the first information is a method for specifically indicating one of PDCCH monitoring operation-related configurations in a plurality of DCP occasions (semi-)statically provided to the terminal (eg, DCI or MAC CE) /header).
- the base station may transmit second information indicating PDCCH monitoring adaptation based on the first information configured through the higher layer signal (1005).
- the second information may be included in DCI.
- the corresponding DCI may be included in a Physical Downlink Control Channel (PDCCH).
- the PDCCH monitoring adaptation operation indicated by the second information may be based on at least one of [Method 1] to [Method 3].
- the base station may transmit PDCCH in DCP Occasion based on the second information (S1007).
- PDCCH received in DCP Occasion may include a wake-up signal.
- the operation of the base station according to the above-described S1003 to S1007 may be based on at least one of [Method 1] to [Method 3].
- the method proposed in the present disclosure may be selected and applied to some of the following methods.
- Each method can be operated in an independent form without a separate combination, or one or more methods can be combined and operated in a linked form.
- Some terms, symbols, and orders used to describe the proposed methods may be replaced with other terms, symbols, and orders as long as the principles of the proposed methods are maintained.
- monitoring at a DCP occasion of a UE is described using an arbitrary exemplary structure to explain the principles of the proposed methods.
- the proposed methods do not specifically limit the type of terminal operation.
- a PDCCH monitoring adaptation period (eg, a PDCCH monitoring skipping period or an SSSG switching period) is set within the DRX Active Time extended by the drx-Inactivity Timer , and a DCP Occasion occurs within the set PDCCH monitoring adaptation period.
- a PDCCH monitoring adaptation period eg, a PDCCH monitoring skipping period or an SSSG switching period
- a DCP Occasion occurs within the set PDCCH monitoring adaptation period.
- FIG. 11 represents a situation in which a DCP Occasion is included in a PDCCH monitoring adaptation period.
- a PDCCH monitoring skipping duration (or SSSG switching duration) in which PDCCH monitoring is not performed is displayed on a white background.
- the DCP occasion within the corresponding duration is indicated as A.
- the PDCCH monitoring adaptation duration within the DRX Active Time is defined as not being the DRX Active Time, and the UE transmits data for DCP (eg, DCI format 2_6) at a DCP occasion within the corresponding duration. monitoring can be performed.
- DCP eg, DCI format 2_6
- the DRX operation of the terminal is defined as shown in [Table 3] extracted from the standard document 3GPP TS 38.321.
- the MAC entity may be configured by RRC with a DRX functionality that controls the UE's PDCCH monitoring activity for the MAC entity's C-RNTI, CI-RNTI, CS-RNTI, INT-RNTI, SFI-RNTI, SP-CSI-RNTI, TPC -PUCCH-RNTI, TPC-PUSCH-RNTI, TPC-SRS-RNTI, and AI-RNTI.
- the MAC entity shall also monitor PDCCH according to requirements found in other clauses of this specification.
- the MAC entity may monitor the PDCCH discontinuously using the DRX operation specified in this clause; otherwise the MAC entity shall monitor the PDCCH as specified in TS 38.213 [6].
- the UE When the UE stops monitoring the PDCCH due to the PDCCH monitoring skipping instruction, it may be defined as not DRX Active Time during the PDCCH monitoring skipping duration. This is because the UE can monitor the DCP occasion only when it is not DRX Active Time. Therefore, since the PDCCH monitoring skipping duration of the UE is not DRX Active Time, monitoring of the DCP (eg, DCI format 2_6) in the DCP occasion may be allowed.
- the DCP eg, DCI format 2_6
- the PDCCH monitoring adaptation duration of the UE is defined as not DRX Active Time and wake-up through monitoring of DCP (eg, DCI format 2_6) on DCP occasion Suggests the operation of the terminal receiving the indication. Through this, the terminal can wake up in the next DRX cycle (wake-up) and determine whether to receive the PDCCH.
- DCP eg, DCI format 2_6
- a power saving effect can be expected compared to the previous operation in which the next drx-onDurationTimer must be started.
- DCP Occasion could not be monitored even in the PDCCH monitoring adaptation period if it was within the DRX Active Time. Therefore, since the terminal does not receive the DCP, drx-onDurationTimer had to be started in the next DRX Cycle when ps-WakeUp is true according to the standard operation definition.
- the fact that the base station has instructed PDCCH monitoring adaptation indicating a PDCCH monitoring skipping section or SSSG switching section within the DRX Active Time may mean that the base station has little or no data to transmit for a certain period of time.
- the terminal does not receive DCP (eg, DCI format 2_6) because the DCP Occasion is included in the PDCCH monitoring adaptation period and starts drx-onDurationTimer in the next DRX Cycle , the UE may continue to excessively perform PDCCH monitoring in the corresponding DRX Cycle, which may result in unnecessary power waste.
- DCP eg, DCI format 2_6
- the PDCCH monitoring adaptation period is defined as a non-DRX Active Time so that the DCP can be monitored in the corresponding PDCCH monitoring adaptation period, thereby preventing unnecessary power waste as described above.
- the PDCCH monitoring adaptation period is set to a non-DRX Active Time, so the DRX related timer may not be counted during the period. For example, when the PDCCH monitoring adaptation period starts, counting of the DRX Active Time timer may be stopped, and when the PDCCH monitoring adaptation period ends, counting of the DRX Active Time timer may be resumed. Also, the counter value at the time of resuming may be the counter value at the point of interruption.
- DRX Active Time can be extended by starting drx-onDurationTimer through a Wake-Up Signal (WUS) transmitted by a base station and then starting drx-InactivityTimer due to a new DL transmission. Thereafter, the base station may instruct the terminal to skip PDCCH monitoring for a certain time or completely terminate the current DRX cycle because there is no expected data traffic. At this time, the UE can receive a wake-up indication for the next DRX cycle by monitoring the DCP occasion during the PDCCH monitoring skipping duration, and as a result, the above-described power saving effect can be expected.
- WUS Wake-Up Signal
- the UE operation of [Method 1] can also be defined for SSSG (Search Space Set Group) switching.
- SSSG Search Space Set Group
- PDCCH monitoring skipping and switching to SSSG#1 are for the same power saving purpose. Therefore, even if the UE receives an SSSG switching (eg, switching to SSSG # 1) indication, PDCCH monitoring on a DCP occasion can be allowed, and a power saving effect can be expected due to this.
- Method 2 If the DCP occasion included in the DRX Active Time is located within the indicated PDCCH monitoring adaptation duration, the UE may perform monitoring for the corresponding MO (Monitoring Occasion) (ie, DCP Occasion).
- MO Monitoring Occasion
- PDCCH monitoring skipping is for stopping PDCCH monitoring during DRX Active Time. If, as in [Method 1], if the DRX timer is stopped during the corresponding PDCCH monitoring skipping duration, PDCCH monitoring is not performed, but DRX monitoring is not performed for the duration of the timer that was stopped after the PDCCH monitoring skipping duration. Active Time can last. That is, DRX Active Time can be resumed as much as the time of the interrupted timer.
- the PDCCH monitoring skipping instruction may be an instruction to stop PDCCH monitoring for the entire DRX Active Time remaining from a specific period or a time point at which PDCCH monitoring skipping is indicated (or a time point at which PDCCH monitoring skipping is applied).
- the base station monitors the PDCCH for the remaining DRX Active Time for the terminal to save power. You can instruct skipping. According to the instruction, a period in which the terminal does not monitor the PDCCH may occur within the DRX Active Time. That is, although it is DRX Active Time, the terminal actually performs the same operation as the section outside DRX Active Time.
- the terminal receives DCP for the next DRX cycle (eg, DCI format 2_6 ) cannot be monitored, so drx-onDurationTimer for the next DRX cycle must be started unconditionally.
- DCP for the next DRX cycle eg, DCI format 2_6
- drx-onDurationTimer for the next DRX cycle must be started unconditionally.
- starting the drx-onDurationTimer for the next DRX cycle unconditionally because WUS cannot be monitored as described above may be detrimental in terms of power saving of the UE. This may be equally applicable to the SSSG switching instruction, which is one of the monitoring adaptation techniques for the purpose of power saving.
- the UE performs PDCCH monitoring on the DCP occasion to obtain WUS information.
- the PDCCH monitoring adaptation duration eg, position A in FIG. 11
- Method 2-1 If the DCP occasion included in the DRX Active Time is located within the PDCCH monitoring adaptation duration, the UE uses the PS-RNTI in the corresponding MO (Monitoring Occasion) (ie, DCP Occasion) to use the PDCCH monitoring can be performed.
- MO Monitoring Occasion
- DCI that can be monitored on a DCP occasion can be DCI format 2_6 utilized for existing WUS.
- DCI format 2_6 utilized for existing WUS.
- the restriction that DCI format 2_6 can be monitored only when it is not DRX Active Time can be eliminated.
- the UE may perform monitoring for the MO (Monitoring Occasion) (eg, DCP occasion) of the Type3-PDCCH CSS using the PS-RNTI.
- MO Monitoring Occasion
- PS-RNTI is not an RNTI controlled by DRX functionality as described in [Table 3]. Therefore, even if PDCCH monitoring within the DRX Active Time is stopped through the PDCCH monitoring skipping indication, monitoring using the PS-RNTI of the UE may be performed.
- An MO (eg, DCP occasion) for DCI format 2_6 corresponds to 1 st full duration within a PDCCH monitoring window as described in FIG. 6 . Therefore, when the PDCCH monitoring window is located within a PDCCH monitoring adaptation duration (eg, PDCCH monitoring skipping duration), DCI format 2_6 including WUS when it is not DRX Active Time is monitored. Monitoring for DCI format 2_6 can be performed in the same way as in the above method.
- DCI format 2_6 can be monitored.
- MO 1 in a PDCCH monitoring window for DCI format 2_6 is included in a PDCCH monitoring adaptation period. Therefore, MO 1 is within the DRX Active Time, but the UE can monitor DCI format 2_6 in MO 1.
- MO2 can be monitored in the same way as the existing method because it is located in the PDCCH monitoring window period, not the DRX Active Time.
- the UE can perform DCI format 2_6 monitoring through the corresponding MO.
- a UE capable of setting or performing the operation proposed in [Method 2-1] can monitor DCI format 2_6 using the PS-RNTI in MO1 or MO2.
- MO1 although it is DRX Active Time, it is located within the duration of PDCCH monitoring adaptation, so according to the operation of [Method 2-1], the UE uses the PS-RNTI at the corresponding DCP occasion (ie MO1) PDCCH monitoring is possible.
- MO2 which is a DCP occasion within a PDCCH monitoring window and not DRX Active Time
- DCI format 2_6 including WUS can be monitored at a corresponding location like a conventional operation.
- the base station may set/instruct the terminal whether to monitor MO1 first when the situation shown in FIG. 12 occurs or skip MO1 monitoring and monitor MO2. Alternatively, if there is no preset setting, it may be determined that the UE primarily monitors MO1, skips MO1 monitoring, and performs MO2 monitoring by default.
- DCP eg, DCI format 2_6 monitoring may be possible without determining an additional definition for DRX Active Time.
- DCP eg, DCI format 2_6
- DCP can be monitored within the DRX Active Time, so that the power saving effect can be increased.
- the DRX timer is counted by considering the PDCCH monitoring adaptation period as the DRX Active Time, it can further meet the purpose of DRX setting DRX for power saving.
- Method 2-2 If the DCP occasion included in the DRX Active Time is located within the PDCCH monitoring adaptation duration, the UE may perform monitoring with the C-RNTI in the corresponding MO (eg, DCP Occasion) there is.
- MO eg, DCP Occasion
- the C-RNTI may be utilized for WUS monitoring at a DCP occasion within a PDCCH monitoring adaptation duration.
- the SS set (s) that can be set as a DCP occasion is Type3-PDCCH CSS, and monitoring is possible with various RNTIs in addition to PS-RNTI in the corresponding SS set.
- WUS monitoring of the UE may be possible in the corresponding SS set using the C-RNTI, which is generally used for PDSCH/PUSCH scheduling for the UE.
- DCI format 1_1 for SCell dormancy case 2. Since DCI format 1_1 for SCell dormancy case 2 does not include scheduling information, it is also called non-scheduling DCI format 1_1, and specific fields of up to 19 bits related to scheduling are used for SCell dormancy indication.
- bits of the field remaining after being used for SCell dormancy indication can be used for WUS indication (indication). That is, among the maximum of 19 bits related to scheduling, remaining bits used for SCell dormancy indication may be used for WUS indication.
- the terminal can monitor DCI format 1_1 using C-RNTI in Type3-PDCCH CSS.
- the UE may determine whether to wake-up in the next DRX cycle based on 1 bit of the WUS indicator included in the received DCI format 1_1.
- DCI formats considered for PDCCH monitoring adaptation in Rel-17 power saving may be utilized. All DCI formats that can indicate PDCCH monitoring adaptation can be used for WUS indication without limitation to a specific DCI format. At least 1 bit or more may be used for indication of PDCCH monitoring adaptation, and a bit value of a field for indication of PDCCH monitoring adaptation may be interpreted differently according to a DCP occasion.
- the UE when the UE receives the DCI for the PDCCH monitoring adaptation indication in the SS set(s) (eg, Type3-PDCCH CSS) corresponding to the DCP occasion, the UE transmits a field for the corresponding PDCCH monitoring adaptation indication. It can be interpreted as a WUS indication.
- the base station may be used as a WUS indicator when transmitted through the SS set (s) corresponding to the DCP occasion in the same DCI format.
- a field for PDCCH monitoring adaptation exceeds 1 bit, it may be used to indicate another operation together with a WUS indication. For example, SSSG to be monitored may be indicated while starting the next DRX cycle along with wake-up status.
- the UE can monitor DCP using C-RNTI in MO1 and monitor DCP using PS-RNTI in MO2.
- the base station may set/instruct each operation to the terminal or the basic operation of the terminal may be determined.
- the WUS indication can be received within the PDCCH monitoring adaptation interval without changing and/or adding the definition of DRX Active Time or the definition of the reception time of DCI format 2_6. Therefore, since the WUS indication can be received within the PDCCH monitoring interval by adding/changing only the DCI field definition without changing the operation of the terminal defined in the standard document, implementation of the terminal can be facilitated. In addition, as described above, backward compatibility of the terminal can be guaranteed.
- Method 3 Monitoring method and operation of UE when DCP occasion included in DRX Active Time is located within PDCCH monitoring adaptation duration
- PDCCH monitoring can be performed using PS-RNTI or C-RNTI in Type3-PDCCH CSS. If the currently monitored SSSG does not include the SS set related to the DCP occasion, as in the case of A in FIG. 11, the DCP occasion included in the PDCCH monitoring interval or, as in the case of FIG. Monitoring for DCP occasions can be exceptionally allowed only in slots located in this overlapping area.
- whether to wake-up the next DRX cycle may be implicitly determined according to the current monitoring SSSG of the UE. For example, if the SSSG monitored by the UE at the time of the DCP occasion is SSSG#1 configured to reduce the number of times of PDCCH monitoring according to the purpose of power saving, it can sleep in the next DRX cycle. Conversely, if the SSSG monitored by the UE at the time of the DCP occasion is SSSG#0 where the number of PDCCH monitoring is set to be frequent for data-efficiency purposes, wake-up can be performed in the next DRX cycle.
- wake-up can be performed in the next DRX cycle.
- These terminal operations may be set/instructed by the base station, or the basic operation of the terminal in the absence of setting/instruction may be determined.
- DCI monitoring using PS-RNTI as well as C-RNTI may be affected.
- DCI monitoring using C-RNTI or PS-RNTI may be temporarily allowed only for DCP occasions.
- the UE uses the MO before and after the PDCCH monitoring skipping duration (eg, DCP occasion) DCI monitoring can be performed in For example, when a PDCCH monitoring skipping duration instructed to the UE overlaps at least a portion of a PDCCH monitoring window of DCP (eg, DCI format 2_6), the UE receives the PDCCH monitoring skipping duration ) DCI monitoring can be performed in the MO (eg, DCP Occasion) of the Type3-PDCCH CSS set that can be located before or after. If MOs (eg, DCP Occasion) are located before and after the PDCCH monitoring skipping duration, the location may be selected according to the implementation of the UE or set/instructed by the base station.
- MO eg, DCP Occasion
- the DCI monitoring method according to [Method 1] to [Method 2] can be implemented more effectively.
- the most efficient method for monitoring DCI including WUS according to PDCCH monitoring adaptation can be applied.
- FIG. 13 illustrates a communication system 1 applied to the present disclosure.
- a communication system 1 applied to the present disclosure includes a wireless device, a base station, and a network.
- the wireless device means a device that performs communication using a radio access technology (eg, 5G New RAT (NR), Long Term Evolution (LTE)), and may be referred to as a communication/wireless/5G device.
- wireless devices include robots 100a, vehicles 100b-1 and 100b-2, XR (eXtended Reality) devices 100c, hand-held devices 100d, and home appliances 100e. ), an Internet of Thing (IoT) device 100f, and an AI device/server 400.
- IoT Internet of Thing
- the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing inter-vehicle communication, and the like.
- the vehicle may include an Unmanned Aerial Vehicle (UAV) (eg, a drone).
- UAV Unmanned Aerial Vehicle
- XR devices include Augmented Reality (AR)/Virtual Reality (VR)/Mixed Reality (MR) devices, Head-Mounted Devices (HMDs), Head-Up Displays (HUDs) installed in vehicles, televisions, smartphones, It may be implemented in the form of a computer, wearable device, home appliance, digital signage, vehicle, robot, and the like.
- a portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, a smart glass), a computer (eg, a laptop computer, etc.), and the like.
- Home appliances may include a TV, a refrigerator, a washing machine, and the like.
- IoT devices may include sensors, smart meters, and the like.
- a base station and a network may also be implemented as a wireless device, and a specific wireless device 200a may operate as a base station/network node to other wireless devices.
- the wireless devices 100a to 100f may be connected to the network 300 through the base station 200 .
- AI Artificial Intelligence
- the network 300 may be configured using a 3G network, a 4G (eg LTE) network, or a 5G (eg NR) network.
- the wireless devices 100a to 100f may communicate with each other through the base station 200/network 300, but may also communicate directly (eg, sidelink communication) without going through the base station/network.
- the vehicles 100b-1 and 100b-2 may perform direct communication (eg, vehicle to vehicle (V2V)/vehicle to everything (V2X) communication).
- IoT devices eg, sensors
- IoT devices may directly communicate with other IoT devices (eg, sensors) or other wireless devices 100a to 100f.
- Wireless communication/connection 150a, 150b, and 150c may be performed between the wireless devices 100a to 100f/base station 200 and the base station 200/base station 200.
- wireless communication/connection refers to various wireless connections such as uplink/downlink communication 150a, sidelink communication 150b (or D2D communication), and inter-base station communication 150c (e.g. relay, Integrated Access Backhaul (IAB)).
- IAB Integrated Access Backhaul
- Wireless communication/connection (150a, 150b, 150c) allows wireless devices and base stations/wireless devices, and base stations and base stations to transmit/receive radio signals to/from each other.
- the wireless communication/connection 150a, 150b, and 150c may transmit/receive signals through various physical channels.
- various signal processing processes eg, channel encoding/decoding, modulation/demodulation, resource mapping/demapping, etc.
- resource allocation processes etc.
- the first wireless device 100 and the second wireless device 200 may transmit and receive radio signals through various radio access technologies (eg, LTE, NR).
- ⁇ the first wireless device 100, the second wireless device 200 ⁇ is the ⁇ wireless device 100x, the base station 200 ⁇ of FIG. 13 and/or the ⁇ wireless device 100x, the wireless device 100x.
- ⁇ can correspond.
- the first wireless device 100 includes one or more processors 102 and one or more memories 104, and may additionally include one or more transceivers 106 and/or one or more antennas 108.
- the processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or flowcharts of operations disclosed herein.
- the processor 102 may process information in the memory 104 to generate first information/signal, and transmit a radio signal including the first information/signal through the transceiver 106.
- the processor 102 may receive a radio signal including the second information/signal through the transceiver 106, and then store information obtained from signal processing of the second information/signal in the memory 104.
- the memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102 .
- memory 104 may perform some or all of the processes controlled by processor 102, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed herein. It may store software codes including them.
- the processor 102 and memory 104 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
- the transceiver 106 may be coupled to the processor 102 and may transmit and/or receive wireless signals via one or more antennas 108 .
- the transceiver 106 may include a transmitter and/or a receiver.
- the transceiver 106 may be used interchangeably with a radio frequency (RF) unit.
- a wireless device may mean a communication modem/circuit/chip.
- At least one memory 104 is a computer readable storage medium that can store instructions or programs, which, when executed, may store the instructions or programs.
- At least one processor operably coupled to the at least one memory may be capable of causing operations in accordance with embodiments or implementations of the present disclosure related to the following operations.
- the processor 102 may transmit capability information and/or UE assistance information to the base station in order to support the operation proposed in the present disclosure.
- the performance information and/or UE assistance information may include information for determining a PDCCH monitoring operation in DCP Occasion. Transmission of capability information and/or UE assistance information is omitted in certain situations (eg, when the base station already has prior information or when each operation method is changed due to the need of the base station) It can be.
- the processor 102 may receive first information for configuring a PDCCH monitoring operation transmitted by a base station to support an operation proposed in the present disclosure through the transceiver 106 .
- the first information may be received through the transceiver 106 using a higher layer signal (eg, System Information Block (SIB) or RRC signaling).
- SIB System Information Block
- the first information may be for configuring PDCCH monitoring adaptation or may be for configuring a DCP monitoring operation in a PDCCH monitoring adaptation interval.
- the first information may be based on at least one of [Method 1] to [Method 3].
- the first information is a method for specifically indicating one of PDCCH monitoring operation-related configurations (eg, DCI Alternatively, it may be received through the transceiver 106 through MAC CE/header).
- the processor 102 may receive second information indicating PDCCH monitoring adaptation through the transceiver 106 based on the first information configured through the higher layer signal.
- the second information may be included in DCI.
- the corresponding DCI may be included in a Physical Downlink Control Channel (PDCCH).
- the PDCCH monitoring adaptation operation indicated by the second information may be based on at least one of [Method 1] to [Method 3].
- the processor 102 may receive the PDCCH through the transceiver 106 in the DCP Occasion based on the second information and perform decoding of the PDCCH (S807).
- PDCCH received in DCP Occasion may include a wake-up signal.
- the above-described operation of the processor 102 may be based on at least one of [Method 1] to [Method 3].
- the second wireless device 200 includes one or more processors 202, one or more memories 204, and may further include one or more transceivers 206 and/or one or more antennas 208.
- Processor 202 controls memory 204 and/or transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed herein.
- the processor 202 may process information in the memory 204 to generate third information/signal, and transmit a radio signal including the third information/signal through the transceiver 206.
- the processor 202 may receive a radio signal including the fourth information/signal through the transceiver 206 and store information obtained from signal processing of the fourth information/signal in the memory 204 .
- the memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202 .
- memory 204 may perform some or all of the processes controlled by processor 202, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed herein. It may store software codes including them.
- the processor 202 and memory 204 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
- the transceiver 206 may be coupled to the processor 202 and may transmit and/or receive wireless signals via one or more antennas 208 .
- the transceiver 206 may include a transmitter and/or a receiver.
- the transceiver 206 may be used interchangeably with an RF unit.
- a wireless device may mean a communication modem/circuit/chip.
- At least one memory 204 is a computer readable storage medium that can store instructions or programs, which, when executed, may store the instructions or programs.
- At least one processor operably coupled to the at least one memory may be capable of causing operations in accordance with embodiments or implementations of the present disclosure related to the following operations.
- the processor 202 may receive terminal capability information and/or UE assistance information from the terminal through the transceiver 206 in order to support the operation proposed in the present disclosure ( S901).
- the performance information and/or UE assistance information may include information for determining a PDCCH monitoring operation in DCP Occasion.
- receiving UE capability information and/or UE assistance information through the transceiver 206 is a specific situation (eg, the processor 202 already has prior information, or the processor ( 202) may be omitted if each operation method is changed due to necessity).
- the processor 202 may transmit first information for configuring a PDCCH monitoring operation through the transceiver 206 to support the operation proposed in the present disclosure.
- the first information may be transmitted through the transceiver 206 using a higher layer signal (eg, System Information Block (SIB) or RRC signaling).
- SIB System Information Block
- RRC Radio Resource Control
- the first information may be for configuring PDCCH monitoring adaptation or may be for configuring a DCP monitoring operation in a PDCCH monitoring adaptation interval.
- the first information may be based on at least one of [Method 1] to [Method 3].
- the first information is a method for specifically indicating one of PDCCH monitoring operation-related configurations in a plurality of DCP occasions (semi-)statically provided to the terminal (eg, DCI or MAC CE) /header).
- the processor 202 may transmit second information indicating PDCCH monitoring adaptation through the transceiver 206 based on the first information configured through the higher layer signal.
- the second information may be included in DCI.
- the corresponding DCI may be included in a Physical Downlink Control Channel (PDCCH).
- the PDCCH monitoring adaptation operation indicated by the second information may be based on at least one of [Method 1] to [Method 3].
- the processor 202 may transmit the PDCCH through the transceiver 206 in the DCP Occasion based on the second information (S907).
- PDCCH received in DCP Occasion may include a wake-up signal.
- the above-described operation of the processor 202 may be based on at least one of [Method 1] to [Method 3].
- one or more protocol layers may be implemented by one or more processors 102, 202.
- one or more processors 102, 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP).
- One or more processors 102, 202 may generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) in accordance with the descriptions, functions, procedures, proposals, methods and/or operational flow charts disclosed herein.
- PDUs Protocol Data Units
- SDUs Service Data Units
- processors 102, 202 may generate messages, control information, data or information according to the descriptions, functions, procedures, proposals, methods and/or operational flow diagrams disclosed herein.
- One or more processors 102, 202 generate PDUs, SDUs, messages, control information, data or signals (e.g., baseband signals) containing information according to the functions, procedures, proposals and/or methods disclosed herein , can be provided to one or more transceivers 106, 206.
- One or more processors 102, 202 may receive signals (eg, baseband signals) from one or more transceivers 106, 206, and descriptions, functions, procedures, proposals, methods, and/or flowcharts of operations disclosed herein PDUs, SDUs, messages, control information, data or information can be obtained according to these.
- signals eg, baseband signals
- One or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor or microcomputer.
- One or more processors 102, 202 may be implemented by hardware, firmware, software, or a combination thereof.
- ASICs Application Specific Integrated Circuits
- DSPs Digital Signal Processors
- DSPDs Digital Signal Processing Devices
- PLDs Programmable Logic Devices
- FPGAs Field Programmable Gate Arrays
- firmware or software may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, and the like.
- Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein may be included in one or more processors 102, 202 or stored in one or more memories 104, 204 and It can be driven by the above processors 102 and 202.
- the descriptions, functions, procedures, suggestions, methods and/or operational flow charts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and/or sets of instructions.
- One or more memories 104, 204 may be coupled with one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, codes, instructions and/or instructions.
- One or more memories 104, 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer readable storage media, and/or combinations thereof.
- One or more memories 104, 204 may be located internally and/or external to one or more processors 102, 202. Additionally, one or more memories 104, 204 may be coupled to one or more processors 102, 202 through various technologies, such as wired or wireless connections.
- One or more transceivers 106, 206 may transmit user data, control information, radio signals/channels, etc., as referred to in the methods and/or operational flow charts herein, to one or more other devices.
- One or more transceivers 106, 206 may receive user data, control information, radio signals/channels, etc. referred to in descriptions, functions, procedures, proposals, methods and/or operational flow charts, etc. disclosed herein from one or more other devices. there is.
- one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive wireless signals.
- one or more processors 102, 202 may control one or more transceivers 106, 206 to transmit user data, control information, or radio signals to one or more other devices. Additionally, one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information, or radio signals from one or more other devices. In addition, one or more transceivers 106, 206 may be coupled with one or more antennas 108, 208, and one or more transceivers 106, 206 via one or more antennas 108, 208, as described herein, function. , procedures, proposals, methods and / or operation flowcharts, etc. can be set to transmit and receive user data, control information, radio signals / channels, etc.
- one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports).
- One or more transceivers (106, 206) convert the received radio signals/channels from RF band signals in order to process the received user data, control information, radio signals/channels, etc. using one or more processors (102, 202). It can be converted into a baseband signal.
- One or more transceivers 106 and 206 may convert user data, control information, and radio signals/channels processed by one or more processors 102 and 202 from baseband signals to RF band signals.
- one or more of the transceivers 106, 206 may include (analog) oscillators and/or filters.
- Vehicles or autonomous vehicles may be implemented as mobile robots, vehicles, trains, manned/unmanned aerial vehicles (AVs), ships, and the like.
- AVs manned/unmanned aerial vehicles
- a vehicle or autonomous vehicle 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit.
- a portion 140d may be included.
- the antenna unit 108 may be configured as part of the communication unit 110 .
- the communication unit 110 may transmit/receive signals (eg, data, control signals, etc.) with external devices such as other vehicles, base stations (e.g. base stations, roadside base stations, etc.), servers, and the like.
- the controller 120 may perform various operations by controlling elements of the vehicle or autonomous vehicle 100 .
- the controller 120 may include an Electronic Control Unit (ECU).
- the driving unit 140a may drive the vehicle or autonomous vehicle 100 on the ground.
- the driving unit 140a may include an engine, a motor, a power train, a wheel, a brake, a steering device, and the like.
- the power supply unit 140b supplies power to the vehicle or autonomous vehicle 100, and may include a wired/wireless charging circuit, a battery, and the like.
- the sensor unit 140c may obtain vehicle conditions, surrounding environment information, and user information.
- the sensor unit 140c includes an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight detection sensor, a heading sensor, a position module, and a vehicle forward.
- IMU inertial measurement unit
- /Can include a reverse sensor, battery sensor, fuel sensor, tire sensor, steering sensor, temperature sensor, humidity sensor, ultrasonic sensor, illuminance sensor, pedal position sensor, and the like.
- the autonomous driving unit 140d includes a technology for maintaining a driving lane, a technology for automatically adjusting speed such as adaptive cruise control, a technology for automatically driving along a predetermined route, and a technology for automatically setting a route when a destination is set and driving. technology can be implemented.
- the communication unit 110 may receive map data, traffic information data, and the like from an external server.
- the autonomous driving unit 140d may generate an autonomous driving route and a driving plan based on the acquired data.
- the controller 120 may control the driving unit 140a so that the vehicle or autonomous vehicle 100 moves along the autonomous driving path according to the driving plan (eg, speed/direction adjustment).
- the communicator 110 may non-/periodically obtain the latest traffic information data from an external server and obtain surrounding traffic information data from surrounding vehicles.
- the sensor unit 140c may acquire vehicle state and surrounding environment information.
- the autonomous driving unit 140d may update an autonomous driving route and a driving plan based on newly acquired data/information.
- the communication unit 110 may transmit information about a vehicle location, an autonomous driving route, a driving plan, and the like to an external server.
- the external server may predict traffic information data in advance using AI technology based on information collected from the vehicle or self-driving vehicles, and may provide the predicted traffic information data to the vehicle or self-driving vehicles.
- the XR device may be implemented as an HMD, a head-up display (HUD) provided in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like.
- HMD head-up display
- the XR device may be implemented as an HMD, a head-up display (HUD) provided in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like.
- HUD head-up display
- the XR device 100a may include a communication unit 110, a control unit 120, a memory unit 130, an input/output unit 140a, a sensor unit 140b, and a power supply unit 140c. .
- the communication unit 110 may transmit/receive signals (eg, media data, control signals, etc.) with external devices such as other wireless devices, portable devices, or media servers.
- Media data may include video, image, sound, and the like.
- the controller 120 may perform various operations by controlling components of the XR device 100a.
- the controller 120 may be configured to control and/or perform procedures such as video/image acquisition, (video/image) encoding, and metadata generation and processing.
- the memory unit 130 may store data/parameters/programs/codes/commands necessary for driving the XR device 100a/creating an XR object.
- the input/output unit 140a may obtain control information, data, etc. from the outside and output the created XR object.
- the input/output unit 140a may include a camera, a microphone, a user input unit, a display unit, a speaker, and/or a haptic module.
- the sensor unit 140b may obtain XR device status, surrounding environment information, user information, and the like.
- the sensor unit 140b 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, and/or a radar. there is.
- the power supply unit 140c supplies power to the XR device 100a and may include a wired/wireless charging circuit, a battery, and the like.
- the memory unit 130 of the XR device 100a may include information (eg, data, etc.) necessary for generating an XR object (eg, AR/VR/MR object).
- the input/output unit 140a may obtain a command to operate the XR device 100a from a user, and the control unit 120 may drive the XR device 100a according to the user's driving command. For example, when a user tries to watch a movie, news, etc. through the XR device 100a, the control unit 120 transmits content request information to another device (eg, the mobile device 100b) or through the communication unit 130. can be transmitted to the media server.
- another device eg, the mobile device 100b
- the communication unit 130 can be transmitted to the media server.
- the communication unit 130 may download/stream content such as movies and news from another device (eg, the portable device 100b) or a media server to the memory unit 130 .
- the control unit 120 controls and/or performs procedures such as video/image acquisition, (video/image) encoding, metadata generation/processing, etc. for content, and acquisition through the input/output unit 140a/sensor unit 140b.
- An XR object may be created/output based on information about a surrounding space or a real object.
- the XR device 100a is wirelessly connected to the portable device 100b through the communication unit 110, and the operation of the XR device 100a may be controlled by the portable device 100b.
- the mobile device 100b may operate as a controller for the XR device 100a.
- the XR device 100a may acquire 3D location information of the portable device 100b and then generate and output an XR object corresponding to the portable device 100b.
- a specific operation described in this document as being performed by a base station may be performed by its upper node in some cases. That is, it is obvious that various operations performed for communication with a terminal in a network composed of a plurality of network nodes including a base station may be performed by the base station or network nodes other than the base station.
- a base station may be replaced by terms such as a fixed station, gNode B (gNB), Node B, eNode B (eNB), and access point.
- the method and apparatus for transmitting and receiving the downlink control channel as described above have been described focusing on examples applied to the 5th generation NewRAT system, but can be applied to various wireless communication systems other than the 5th generation NewRAT system.
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Abstract
Description
| 7.3.1.3.7 Format 2_6 DCI format 2_6 is used for notifying the power saving information outside DRX Active Time for one or more UEs. The following information is transmitted by means of the DCI format 2_6 with CRC scrambled by PS-RNTI: - block number 1, block number 2,쪋, block number N where the starting position of a block is determined by the parameter ps-PositionDCI-2-6 provided by higher layers for the UE configured with the block. If the UE is configured with higher layer parameter PS-RNTI and dci-Format2-6, one block is configured for the UE by higher layers, with the following fields defined for the block: - Wake-up indication - 1 bit - SCell dormancy indication - 0 bit if higher layer parameter Scell-groups-for-dormancy-outside-active-time is not configured; otherwise 1, 2, 3, 4 or 5 bits bitmap determined according to higher layer parameter Scell-groups-for-dormancy-outside-active-time, where each bit corresponds to one of the SCell group(s) configured by higher layers parameter Scell-groups-for-dormancy-outside-active-time, with MSB to LSB of the bitmap corresponding to the first to last configured SCell group. The size of DCI format 2_6 is indicated by the higher layer parameter sizeDCI-2-6, according to Clause 10.3 of TS 38.213. |
| When DRX is configured, the Active Time for Serving Cells in a DRX group includes the time while: - drx-onDurationTimer or drx-InactivityTimer configured for the DRX group is running; or - drx-RetransmissionTimerDL or drx-RetransmissionTimerUL is running on any Serving Cell in the DRX group; or - ra-ContentionResolutionTimer (as described in clause 5.1.5) or msgB-ResponseWindow (as described in clause 5.1.4a) is running; or - a Scheduling Request is sent on PUCCH and is pending (as described in clause 5.4.4); or - a PDCCH indicating a new transmission addressed to the C-RNTI of the MAC entity has not been received after successful reception of a Random Access Response for the Random Access Preamble not selected by the MAC entity among the contention-based Random Access Preamble (as described in clauses 5.1.4 and 5.1.4a). |
| The MAC entity may be configured by RRC with a DRX functionality that controls the UE's PDCCH monitoring activity for the MAC entity's C-RNTI, CI-RNTI, CS-RNTI, INT-RNTI, SFI-RNTI, SP-CSI-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI, TPC-SRS-RNTI, and AI-RNTI. When using DRX operation, the MAC entity shall also monitor PDCCH according to requirements found in other clauses of this specification. When in RRC_CONNECTED, if DRX is configured, for all the activated Serving Cells, the MAC entity may monitor the PDCCH discontinuously using the DRX operation specified in this clause; otherwise the MAC entity shall monitor the PDCCH as specified in TS 38.213 [6]. |
Claims (16)
- 무선 통신 시스템에서, 단말이 DCI (Downlink Control Information)를 수신하는 방법에 있어서,DRX (Discontinuous Reception) 와 관련된 제 1 정보를 수신하고,상기 제 1 정보를 기반으로, DRX 활성 시간(Active Time)을 위한 타이머가 동작(running)하고,상기 DRX 활성 시간에 기반하여, PDCCH (Physical Downlink Control Channel) 모니터링 적응(monitoring adaptation)에 관련된 제 2 정보를 수신하고,상기 제 2 정보를 기반으로, 일정 구간 동안 PDCCH 모니터링 적응을 수행하고,상기 DRX 활성 시간과 상기 일정 구간이 중첩된 구간 내에 WUS (Wake-up Signal)를 위한 PDCCH 모니터링 기회(Monitoring Occasion)이 포함된 것을 기반으로, 상기 PDCCH 모니터링 기회를 통해 상기 WUS를 포함하는 DCI를 수신하는 것을 포함하는,DCI 수신 방법.
- 제 1 항에 있어서,상기 중첩된 구간은, 상기 DRX 활성 시간으로 간주되지 않는,DCI 수신 방법.
- 제 1 항에 있어서,상기 DCI는, 상기 중첩된 구간이 상기 DRX 활성 시간으로 간주됨에도 불구하고, 수신되는,DCI 수신 방법.
- 제 1 항에 있어서,상기 DCI는, PS-RNTI (Radio Network temporary identifier)를 기반으로 수신되는,DCI 수신 방법.
- 제 1 항에 있어서,상기 DCI는, C-RNTI (Radio Network temporary identifier)를 기반으로 수신되고, DCI 포맷 2_6과는 상이한 포맷(format)을 가지는,DCI 수신 방법.
- 제 1 항에 있어서,상기 PDCCH 모니터링 기회는 Type3-PDCCH CSS (Common Search Space)에 대응하는,DCI 수신 방법.
- 무선 통신 시스템에서, DCI (Downlink Control Information)를 수신하기 위한 단말에 있어서,적어도 하나의 송수신기;적어도 하나의 프로세서; 및상기 적어도 하나의 프로세서에 동작 가능하도록 연결되고, 실행될 경우 상기 적어도 하나의 프로세서가 동작을 수행하도록 하는 명령들(instructions)을 저장하는 적어도 하나의 메모리를 포함하고,상기 동작은:상기 적어도 하나의 송수신기를 통해, DRX (Discontinuous Reception) 와 관련된 제 1 정보를 수신하고,상기 제 1 정보를 기반으로, DRX 활성 시간(Active Time)을 위한 타이머가 동작(running)하고,상기 적어도 하나의 송수신기를 통해, 상기 DRX 활성 시간에 기반하여, PDCCH (Physical Downlink Control Channel) 모니터링 적응(monitoring adaptation)에 관련된 제 2 정보를 수신하고,상기 제 2 정보를 기반으로, 일정 구간 동안 PDCCH 모니터링 적응을 수행하고,상기 DRX 활성 시간과 상기 일정 구간이 중첩된 구간 내에 WUS (Wake-up Signal)를 위한 PDCCH 모니터링 기회(Monitoring Occasion)이 포함된 것을 기반으로, 상기 적어도 하나의 송수신기를 통해, 상기 PDCCH 모니터링 기회를 통해 상기 WUS를 포함하는 DCI를 수신하는 것을 포함하는,단말.
- 제 7 항에 있어서,상기 중첩된 구간은, 상기 DRX 활성 시간으로 간주되지 않는,단말.
- 제 7 항에 있어서,상기 DCI는, 상기 중첩된 구간이 상기 DRX 활성 시간으로 간주됨에도 불구하고, 수신되는,단말.
- 제 7 항에 있어서,상기 DCI는, PS-RNTI (Radio Network temporary identifier)를 기반으로 수신되는,단말.
- 제 7 항에 있어서,상기 DCI는, C-RNTI (Radio Network temporary identifier)를 기반으로 수신되고, DCI 포맷 2_6과는 상이한 포맷(format)을 가지는,단말.
- 제 7 항에 있어서,상기 PDCCH 모니터링 기회는 Type3-PDCCH CSS (Common Search Space)에 대응하는,단말.
- 무선 통신 시스템에서, DCI (Downlink Control Information)를 수신하기 위한 장치에 있어서,적어도 하나의 프로세서; 및상기 적어도 하나의 프로세서에 동작 가능하도록 연결되고, 실행될 경우 상기 적어도 하나의 프로세서가 동작을 수행하도록 하는 명령들(instructions)을 저장하는 적어도 하나의 메모리를 포함하고,상기 동작은:DRX (Discontinuous Reception) 와 관련된 제 1 정보를 수신하고,상기 제 1 정보를 기반으로, DRX 활성 시간(Active Time)을 위한 타이머가 동작(running)하고,상기 DRX 활성 시간에 기반하여, PDCCH (Physical Downlink Control Channel) 모니터링 적응(monitoring adaptation)에 관련된 제 2 정보를 수신하고,상기 제 2 정보를 기반으로, 일정 구간 동안 PDCCH 모니터링 적응을 수행하고,상기 DRX 활성 시간과 상기 일정 구간이 중첩된 구간 내에 WUS (Wake-up Signal)를 위한 PDCCH 모니터링 기회(Monitoring Occasion)이 포함된 것을 기반으로, 상기 PDCCH 모니터링 기회를 통해 상기 WUS를 포함하는 DCI를 수신하는 것을 포함하는,장치.
- 적어도 하나의 프로세서가 동작을 수행하도록 하는 적어도 하나의 컴퓨터 프로그램을 포함하는 컴퓨터 판독 가능한 저장 매체로서, 상기 동작은:DRX (Discontinuous Reception) 와 관련된 제 1 정보를 수신하고,상기 제 1 정보를 기반으로, DRX 활성 시간(Active Time)을 위한 타이머가 동작(running)하고,상기 DRX 활성 시간에 기반하여, PDCCH (Physical Downlink Control Channel) 모니터링 적응(monitoring adaptation)에 관련된 제 2 정보를 수신하고,상기 제 2 정보를 기반으로, 일정 구간 동안 PDCCH 모니터링 적응을 수행하고,상기 DRX 활성 시간과 상기 일정 구간이 중첩된 구간 내에 WUS (Wake-up Signal)를 위한 PDCCH 모니터링 기회(Monitoring Occasion)이 포함된 것을 기반으로, 상기 PDCCH 모니터링 기회를 통해 상기 WUS를 포함하는 DCI를 수신하는 것을 포함하는,컴퓨터 판독 가능한 저장 매체.
- 무선 통신 시스템에서, 기지국이 DCI (Downlink Control Information)를 전송하는 방법에 있어서,DRX (Discontinuous Reception) 와 관련된 제 1 정보를 전송하고,상기 제 1 정보에 기반한 DRX 활성 시간에 기반하여, PDCCH (Physical Downlink Control Channel) 모니터링 적응(monitoring adaptation)에 관련된 제 2 정보를 전송하고,상기 DRX 활성 시간과 상기 제 2 정보에 기반하여 상기 PDCCH 모니터링 적응이 수행되는 일정 구간이 중첩된 구간 내에 WUS (Wake-up Signal)를 위한 PDCCH 모니터링 기회(Monitoring Occasion)이 포함된 것을 기반으로, 상기 PDCCH 모니터링 기회를 통해 상기 WUS를 포함하는 DCI를 전송하는 것을 포함하는,DCI 전송 방법.
- 무선 통신 시스템에서, DCI (Downlink Control Information)를 전송하기 위한 기지국에 있어서,적어도 하나의 송수신기;적어도 하나의 프로세서; 및상기 적어도 하나의 프로세서에 동작 가능하도록 연결되고, 실행될 경우 상기 적어도 하나의 프로세서가 동작을 수행하도록 하는 명령들(instructions)을 저장하는 적어도 하나의 메모리를 포함하고,상기 동작은:상기 적어도 하나의 송수신기를 통해, DRX (Discontinuous Reception) 와 관련된 제 1 정보를 전송하고,상기 적어도 하나의 송수신기를 통해, 상기 제 1 정보에 기반한 DRX 활성 시간에 기반하여, PDCCH (Physical Downlink Control Channel) 모니터링 적응(monitoring adaptation)에 관련된 제 2 정보를 전송하고,상기 DRX 활성 시간과 상기 제 2 정보에 기반하여 상기 PDCCH 모니터링 적응이 수행되는 일정 구간이 중첩된 구간 내에 WUS (Wake-up Signal)를 위한 PDCCH 모니터링 기회(Monitoring Occasion)이 포함된 것을 기반으로, 상기 적어도 하나의 송수신기를 통해, 상기 PDCCH 모니터링 기회를 통해 상기 WUS를 포함하는 DCI를 전송하는 것을 포함하는,기지국.
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