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WO2025063465A1 - Communication basée sur un accès aléatoire - Google Patents

Communication basée sur un accès aléatoire Download PDF

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Publication number
WO2025063465A1
WO2025063465A1 PCT/KR2024/010345 KR2024010345W WO2025063465A1 WO 2025063465 A1 WO2025063465 A1 WO 2025063465A1 KR 2024010345 W KR2024010345 W KR 2024010345W WO 2025063465 A1 WO2025063465 A1 WO 2025063465A1
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WIPO (PCT)
Prior art keywords
robot
processor
present disclosure
random access
base station
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PCT/KR2024/010345
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English (en)
Inventor
Ki-Dong Lee
Hyunsook Kim
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LG Electronics Inc
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LG Electronics Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal

Definitions

  • the present specification relates to a radio communication.
  • 3rd Generation Partnership Project (3GPP) Long-Term Evolution (LTE) is a technology for enabling high-speed packet communications. Many schemes have been proposed for the LTE objective including those that aim to reduce user and provider costs, improve service quality, and expand and improve coverage and system capacity.
  • the 3GPP LTE requires reduced cost per bit, increased service availability, flexible use of a frequency band, a simple structure, an open interface, and adequate power consumption of a terminal as an upper-level requirement.
  • ITU International Telecommunication Union
  • 3GPP has to identify and develop the technology components needed for successfully standardizing the new RAT timely satisfying both the urgent market needs, and the more long-term requirements set forth by the ITU Radio communication sector (ITU-R) International Mobile Telecommunications (IMT)-2020 process.
  • ITU-R ITU Radio communication sector
  • IMT International Mobile Telecommunications
  • the NR should be able to use any spectrum band ranging at least up to 100 GHz that may be made available for wireless communications even in a more distant future.
  • the NR targets a single technical framework addressing all usage scenarios, requirements and deployment scenarios including enhanced Mobile BroadBand (eMBB), massive Machine Type Communications (mMTC), Ultra-Reliable and Low Latency Communications (URLLC), etc.
  • eMBB enhanced Mobile BroadBand
  • mMTC massive Machine Type Communications
  • URLLC Ultra-Reliable and Low Latency Communications
  • the NR shall be inherently forward compatible.
  • time period for securely reconnecting is required to be less than 1 second.
  • shorter time period for reconnecting such as 100ms or 10ms was not supported.
  • a UE and a base station may perform random access based on a dedicated preamble.
  • a method for performing communication by a UE may comprise: transmitting random access preamble to a base station; receiving response message in response to the random access preamble from the base station; transmitting request message related to fast connection recovery time-sensitive networking to the base station, based on an application of the UE; and receiving information related to dedicated preamble from the base station.
  • an apparatus for implementing the above method is provided.
  • a method for performing communication by a base station may comprise: transmitting random access preamble to a base station; receiving random access preamble from a UE; transmitting response message in response to the random access preamble to the UE; receiving request message related to fast connection recovery time-sensitive networking from the UE; and transmitting information related to dedicated preamble to the UE.
  • an apparatus for implementing the above method is provided.
  • FIG. 1 shows an example of a communication system to which implementations of the present disclosure is applied.
  • FIG. 2 shows an example of wireless devices to which implementations of the present disclosure is applied.
  • FIG. 3 shows an example of UE to which implementations of the present disclosure is applied.
  • FIGS. 5a through 5e shows an example of RACH procedures applicable to an embodiment of the present disclosure.
  • FIG. 7 illustrates an example of CBRA with 4-step RA type.
  • FIGS. 9a and 9b illustrates an example of operations for the first example of the present disclosure.
  • FIG. 10 illustrates an example of operations for the second example of the present disclosure.
  • FIG. 11 illustrates an example of operations according to an embodiment of 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
  • MC-FDMA Multi Carrier Frequency Division Multiple Access
  • CDMA may be embodied through radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
  • TDMA may be embodied through radio technology such as Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), or Enhanced Data rates for GSM Evolution (EDGE).
  • OFDMA may be embodied through radio technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, or Evolved UTRA (E-UTRA).
  • UTRA is a part of a 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.
  • 3GPP LTE employs OFDMA in downlink (DL) and SC-FDMA in uplink (UL).
  • Evolution of 3GPP LTE includes LTE-Advanced (LTE-A), LTE-A Pro, and/or 5G New Radio (NR).
  • LTE-A LTE-Advanced
  • implementations of the present disclosure are mainly described in regards to a 3GPP based wireless communication system.
  • the technical features of the present disclosure are not limited thereto.
  • the following detailed description is given based on a mobile communication system corresponding to a 3GPP based wireless communication system, aspects of the present disclosure that are not limited to 3GPP based wireless communication system are applicable to other mobile communication systems.
  • a or B may mean “only A”, “only B”, or “both A and B”.
  • a or B in the present disclosure may be interpreted as “A and/or B”.
  • A, B or C in the present disclosure may mean “only A”, “only B”, “only C”, or "any combination of A, B and C”.
  • slash (/) or comma (,) may mean “and/or”.
  • A/B may mean “A and/or B”.
  • A/B may mean "only A”, “only B”, or “both A and B”.
  • A, B, C may mean "A, B or C”.
  • At least one of A and B may mean “only A”, “only B” or “both A and B”.
  • the expression “at least one of A or B” or “at least one of A and/or B” in the present disclosure may be interpreted as same as “at least one of A and B”.
  • At least one of A, B and C may mean “only A”, “only B”, “only C”, or “any combination of A, B and C”.
  • at least one of A, B or C or “at least one of A, B and/or C” may mean “at least one of A, B and C”.
  • parentheses used in the present disclosure may mean “for example”.
  • control information PDCCH
  • PDCCH control information
  • PDCCH control information
  • PDCCH control information
  • FIG. 1 shows an example of a communication system to which implementations of the present disclosure is applied.
  • Three main requirement categories for 5G include (1) a category of enhanced Mobile BroadBand (eMBB), (2) a category of massive Machine Type Communication (mMTC), and (3) a category of Ultra-Reliable and Low Latency Communications (URLLC).
  • eMBB enhanced Mobile BroadBand
  • mMTC massive Machine Type Communication
  • URLLC Ultra-Reliable and Low Latency Communications
  • the communication system 1 includes wireless devices 100a to 100f, Base Stations (BSs) 200, and a network 300.
  • FIG. 1 illustrates a 5G network as an example of the network of the communication system 1, the implementations of the present disclosure are not limited to the 5G system, and can be applied to the future communication system beyond the 5G system.
  • the BSs 200 and the network 300 may be implemented as wireless devices and a specific wireless device may operate as a BS/network node with respect to other wireless devices.
  • the wireless devices 100a to 100f represent devices performing communication using Radio Access Technology (RAT) (e.g., 5G NR or LTE) and may be referred to as communication/radio/5G devices.
  • RAT Radio Access Technology
  • the wireless devices 100a to 100f may include, without being limited to, a robot 100a, vehicles 100b-1 and 100b-2, an eXtended Reality (XR) device 100c, a hand-held device 100d, a home appliance 100e, an Internet-of-Things (IoT) device 100f, and an Artificial Intelligence (AI) device/server 400.
  • the vehicles may include a vehicle having a wireless communication function, an autonomous driving vehicle, and a vehicle capable of performing communication between vehicles.
  • the wireless devices 100a to 100f may be called User Equipments (UEs).
  • a UE may include, for example, a cellular phone, a smartphone, a laptop computer, a digital broadcast terminal, a Personal Digital Assistant (PDA), a Portable Multimedia Player (PMP), a navigation system, a slate Personal Computer (PC), a tablet PC, an ultrabook, a vehicle, a vehicle having an autonomous traveling function, a connected car, an UAV, an AI module, a robot, an AR device, a VR device, an MR device, a hologram device, a public safety device, an MTC device, an IoT device, a medical device, a FinTech device (or a financial device), a security device, a weather/environment device, a device related to a 5G service, or a device related to a fourth industrial revolution field.
  • PDA Personal Digital Assistant
  • PMP Portable Multimedia Player
  • PC slate Personal Computer
  • tablet PC a tablet PC
  • ultrabook a vehicle, a vehicle having
  • the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., Vehicle-to-Vehicle (V2V)/Vehicle-to-everything (V2X) communication).
  • the IoT device e.g., a sensor
  • the IoT device may perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.
  • Wireless communication/connections 150a, 150b and 150c may be established between the wireless devices 100a to 100f and/or between wireless device 100a to 100f and BS 200 and/or between BSs 200.
  • the wireless communication/connections may be established through various RATs (e.g., 5G NR) such as uplink/downlink communication 150a, sidelink communication (or Device-to-Device (D2D) communication) 150b, inter-base station communication 150c (e.g., relay, Integrated Access and Backhaul (IAB)), etc.
  • the wireless devices 100a to 100f and the BSs 200/the wireless devices 100a to 100f may transmit/receive radio signals to/from each other through the wireless communication/connections 150a, 150b and 150c.
  • the wireless communication/connections 150a, 150b and 150c may transmit/receive signals through various physical channels.
  • various configuration information configuring processes e.g., channel encoding/decoding, modulation/demodulation, and resource mapping/de-mapping
  • resource allocating processes for transmitting/receiving radio signals, may be performed based on the various proposals of the present disclosure.
  • NR supports multiples numerologies (and/or multiple Sub-Carrier Spacings (SCS)) to support various 5G services. For example, if SCS is 15 kHz, wide area can be supported in traditional cellular bands, and if SCS is 30 kHz/60 kHz, dense-urban, lower latency, and wider carrier bandwidth can be supported. If SCS is 60 kHz or higher, bandwidths greater than 24.25 GHz can be supported to overcome phase noise.
  • numerologies and/or multiple Sub-Carrier Spacings (SCS)
  • the NR frequency band may be defined as two types of frequency range, i.e., Frequency Range 1 (FR1) and Frequency Range 2 (FR2).
  • the numerical value of the frequency range may be changed.
  • the frequency ranges of the two types may be as shown in Table 1 below.
  • FR1 may mean "sub 6 GHz range”
  • FR2 may mean "above 6 GHz range”
  • mmW millimeter Wave
  • FR1 may include a frequency band of 410MHz to 7125MHz as shown in Table 2 below. That is, FR1 may include a frequency band of 6GHz (or 5850, 5900, 5925 MHz, etc.) or more. For example, a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or more included in FR1 may include an unlicensed band. Unlicensed bands may be used for a variety of purposes, for example for communication for vehicles (e.g., autonomous driving).
  • LTE-M technology may be implemented in at least one of the various specifications, such as 1) LTE Cat 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-bandwidth limited (non-BL), 5) LTE-MTC, 6) LTE Machine Type Communication, and/or 7) LTE M, and may not be limited to the above-mentioned names.
  • the radio communication technologies implemented in the wireless devices in the present disclosure may include at least one of ZigBee, Bluetooth, and/or LPWAN which take into account low-power communication, and may not be limited to the above-mentioned names.
  • ZigBee technology may generate Personal Area Networks (PANs) associated with small/low-power digital communication based on various specifications such as IEEE 802.15.4 and may be called various names.
  • PANs Personal Area Networks
  • FIG. 2 shows an example of wireless devices to which implementations of the present disclosure is applied.
  • the first wireless device 100 and/or the second wireless device 200 may be implemented in various forms according to use cases/services.
  • ⁇ the first wireless device 100 and the second wireless device 200 ⁇ may correspond to at least one of ⁇ the wireless device 100a to 100f and the BS 200 ⁇ , ⁇ the wireless device 100a to 100f and the wireless device 100a to 100f ⁇ and/or ⁇ the BS 200 and the BS 200 ⁇ of FIG. 1.
  • the first wireless device 100 and/or the second wireless device 200 may be configured by various elements, devices/parts, and/or modules.
  • the first wireless device 100 may include at least one transceiver, such as a transceiver 106, at least one processing chip, such as a processing chip 101, and/or one or more antennas 108.
  • a transceiver such as a transceiver 106
  • a processing chip such as a processing chip 101
  • antennas 108 one or more antennas 108.
  • the processing chip 101 may include at least one processor, such a processor 102, and at least one memory, such as a memory 104. Additional and/or alternatively, the memory 104 may be placed outside of the processing chip 101.
  • the processor 102 may control the memory 104 and/or the transceiver 106 and may be adapted to implement the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts described in the present disclosure. For example, the processor 102 may process information within the memory 104 to generate first information/signals and then transmit radio signals including the first information/signals through the transceiver 106. The processor 102 may receive radio signals including second information/signals through the transceiver 106 and then store information obtained by processing the second information/signals in the memory 104.
  • the processor 102 and the memory 104 may be a part of a communication modem/circuit/chip designed to implement RAT (e.g., LTE or NR).
  • the transceiver 106 may be connected to the processor 102 and transmit and/or receive radio signals through one or more antennas 108.
  • Each of the transceiver 106 may include a transmitter and/or a receiver.
  • the transceiver 106 may be interchangeably used with Radio Frequency (RF) unit(s).
  • the first wireless device 100 may represent a communication modem/circuit/chip.
  • the second wireless device 200 may include at least one transceiver, such as a transceiver 206, at least one processing chip, such as a processing chip 201, and/or one or more antennas 208.
  • the processing chip 201 may include at least one processor, such a processor 202, and at least one memory, such as a memory 204. Additional and/or alternatively, the memory 204 may be placed outside of the processing chip 201.
  • the processor 202 may control the memory 204 and/or the transceiver 206 and may be adapted to implement the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts described in the present disclosure. For example, the processor 202 may process information within the memory 204 to generate third information/signals and then transmit radio signals including the third information/signals through the transceiver 206. The processor 202 may receive radio signals including fourth information/signals through the transceiver 106 and then store information obtained by processing the fourth information/signals in the memory 204.
  • the memory 204 may be operably connectable to the processor 202.
  • the memory 204 may store various types of information and/or instructions.
  • the memory 204 may store a firmware and/or a software code 205 which implements codes, commands, and/or a set of commands that, when executed by the processor 202, perform the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure.
  • the firmware and/or the software code 205 may implement instructions that, when executed by the processor 202, perform the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure.
  • the firmware and/or the software code 205 may control the processor 202 to perform one or more protocols.
  • the firmware and/or the software code 205 may control the processor 202 to perform one or more layers of the radio interface protocol.
  • the processor 202 and the memory 204 may be a part of a communication modem/circuit/chip designed to implement RAT (e.g., LTE or NR).
  • the transceiver 206 may be connected to the processor 202 and transmit and/or receive radio signals through one or more antennas 208.
  • Each of the transceiver 206 may include a transmitter and/or a receiver.
  • the transceiver 206 may be interchangeably used with RF unit.
  • the second wireless device 200 may represent a communication modem/circuit/chip.
  • One or more protocol layers may be implemented by, without being limited to, one or more processors 102 and 202.
  • the one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as Physical (PHY) layer, Media Access Control (MAC) layer, Radio Link Control (RLC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Resource Control (RRC) layer, and Service Data Adaptation Protocol (SDAP) layer).
  • layers e.g., functional layers such as Physical (PHY) layer, Media Access Control (MAC) layer, Radio Link Control (RLC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Resource Control (RRC) layer, and Service Data Adaptation Protocol (SDAP) layer).
  • PHY Physical
  • MAC Media Access Control
  • RLC Radio Link Control
  • PDCP Packet Data Convergence Protocol
  • RRC Radio Resource Control
  • SDAP Service Data Adaptation Protocol
  • the one or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs), one or more Service Data Unit (SDUs), messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure.
  • the one or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure and provide the generated signals to the one or more transceivers 106 and 206.
  • signals e.g., baseband signals
  • the one or more processors 102 and 202 may receive the signals (e.g., baseband signals) from the one or more transceivers 106 and 206 and acquire the PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure.
  • signals e.g., baseband signals
  • the one or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers.
  • the one or more processors 102 and 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
  • the one or more processors 102 and 202 may be configured by a set of a communication control processor, an Application Processor (AP), an Electronic Control Unit (ECU), a Central Processing Unit (CPU), a Graphic Processing Unit (GPU), and a memory control processor.
  • AP Application Processor
  • ECU Electronic Control Unit
  • CPU Central Processing Unit
  • GPU Graphic Processing Unit
  • memory control processor a memory control processor
  • the one or more memories 104 and 204 may be connected to the one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, code, instructions, and/or commands.
  • the one or more memories 104 and 204 may be configured by Random Access Memory (RAM), Dynamic RAM (DRAM), Read-Only Memory (ROM), electrically Erasable Programmable Read-Only Memory (EPROM), flash memory, volatile memory, non-volatile memory, hard drive, register, cash memory, computer-readable storage medium, and/or combinations thereof.
  • the one or more memories 104 and 204 may be located at the interior and/or exterior of the one or more processors 102 and 202.
  • the one or more memories 104 and 204 may be connected to the one or more processors 102 and 202 through various technologies such as wired or wireless connection.
  • the one or more processors 102 and 202 may perform control so that the one or more transceivers 106 and 206 may transmit user data, control information, or radio signals to one or more other devices.
  • the one or more processors 102 and 202 may perform control so that the one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices.
  • the one or more transceivers 106 and 206 may be connected to the one or more antennas 108 and 208. Additionally and/or alternatively, the one or more transceivers 106 and 206 may include one or more antennas 108 and 208. The one or more transceivers 106 and 206 may be adapted to transmit and receive user data, control information, and/or radio signals/channels, mentioned in the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure, through the one or more antennas 108 and 208. In the present disclosure, the one or more antennas 108 and 208 may be a plurality of physical antennas or a plurality of logical antennas (e.g., antenna ports).
  • the one or more transceivers 106 and 206 can up-convert OFDM baseband signals to OFDM signals by their (analog) oscillators and/or filters under the control of the one or more processors 102 and 202 and transmit the up-converted OFDM signals at the carrier frequency.
  • the one or more transceivers 106 and 206 may receive OFDM signals at a carrier frequency and down-convert the OFDM signals into OFDM baseband signals by their (analog) oscillators and/or filters under the control of the one or more processors 102 and 202.
  • a UE may operate as a transmitting device in Uplink (UL) and as a receiving device in Downlink (DL).
  • a BS may operate as a receiving device in UL and as a transmitting device in DL.
  • the first wireless device 100 acts as the UE
  • the second wireless device 200 acts as the BS.
  • the processor(s) 102 connected to, mounted on or launched in the first wireless device 100 may be adapted to perform the UE behavior according to an implementation of the present disclosure or control the transceiver(s) 106 to perform the UE behavior according to an implementation of the present disclosure.
  • a BS is also referred to as a node B (NB), an eNode B (eNB), or a gNB.
  • NB node B
  • eNB eNode B
  • gNB gNode B
  • a UE 100 may correspond to the first wireless device 100 of FIG. 2.
  • a UE 100 includes a processor 102, a memory 104, a transceiver 106, one or more antennas 108, a power management module 141, a battery 142, a display 143, a keypad 144, a Subscriber Identification Module (SIM) card 145, a speaker 146, and a microphone 147.
  • SIM Subscriber Identification Module
  • processor 102 may be found in SNAPDRAGON TM series of processors made by Qualcomm ® , EXYNOS TM series of processors made by Samsung ® , A series of processors made by Apple ® , HELIO TM series of processors made by MediaTek ® , ATOM TM series of processors made by Intel ® or a corresponding next generation processor.
  • the power management module 141 manages power for the processor 102 and/or the transceiver 106.
  • the battery 142 supplies power to the power management module 141.
  • the display 143 outputs results processed by the processor 102.
  • the keypad 144 receives inputs to be used by the processor 102.
  • the keypad 144 may be shown on the display 143.
  • the SIM card 145 is an integrated circuit that is intended to securely store the International Mobile Subscriber Identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephony devices (such as mobile phones and computers). It is also possible to store contact information on many SIM cards.
  • IMSI International Mobile Subscriber Identity
  • the speaker 146 outputs sound-related results processed by the processor 102.
  • the microphone 147 receives sound-related inputs to be used by the processor 102.
  • FIG. 4 shows an example of 5G system architecture to which implementations of the present disclosure is applied.
  • the 5G system (5GS) architecture consists of the following network functions (NF).
  • DN - Data Network
  • operator services e.g., operator services, Internet access or 3rd party services
  • NSSF Network Slice Selection Function
  • PCF Policy Control Function
  • SMS Session Management Function
  • NWDAF Network Data Analytics Function
  • N3IWF Non-3GPP InterWorking Function
  • TNGF Non-3GPP Gateway Function
  • W-AGF Wireline Access Gateway Function
  • the UDSF, NEF and NRF have not been depicted. However, all depicted Network Functions can interact with the UDSF, UDR, NEF and NRF as necessary.
  • the UDR and its connections with other NFs are not depicted in FIG. 4.
  • the NWDAF and its connections with other NFs are not depicted in FIG. 4.
  • the 5G system architecture contains the following reference points:
  • a couple of NFs may need to be associated with each other to serve a UE.
  • FIGS. 5a through 5e shows an example of RACH procedures applicable to an embodiment of the present disclosure.
  • the two types of random access procedures include a four-stage Random Access (RA) type using MSG1 and a two-stage RA type using MSGA.
  • RA Random Access
  • FIG. 5a and FIG. 5c a four-stage RA type using MSG1 is illustrated.
  • Step 4 The MSG1 of RA type contains the preamble of the PRACH.
  • the UE transmits the MSG1. After the UE sends the MSG1, the UE monitors the network for a response within the set window.
  • the UE when the UE receives a random access response (MSG2) from the gNB, the UE may transmit MSG3 using the UL grant scheduled by the response message. The UE may then monitor the contention resolution. If contention resolution is not successful after the MSG3 (re)transmission, the UE shall perform the MSG1 transmission again.
  • MSG2 random access response
  • a dedicated preamble for MSG1 transmission is allocated by the network.
  • the gNB sends the RA preamble assignment to the UE.
  • the UE transmits an MSG1 containing the random access preamble to the gNB.
  • the UE terminates the random access procedure.
  • the MSGA of the two-stage RA type includes a random access preamble on the PRACH and a PUSCH payload. After the UE transmits the MSGA, the UE monitors the response from the network within a set window.
  • the UE After the UE receives the network response (e.g., MSGB), if the contention resolution is successful, the UE terminates the random access procedure. If the fallback indication is received within the MSGB, the UE performs the MSG3 transmission using the UL grant scheduled in the fallback indication and monitors the contention resolution, as shown in FIG. 5e. If contention resolution is not successful after the MSG3 (re)transmission, the UE shall perform the MSGA transmission again.
  • the network response e.g., MSGB
  • the UE may receive RA preamble allocation and PUSCH allocation from the gNB. Dedicated preamble and PUSCH resources may then be set up for MSGA transmission. The UE transmits the MSGA. When the UE receives a network response, the UE terminates the random access procedure.
  • the UE may be set to switch to the CBRA of the four-stage RA type.
  • a UE may be a robot. Multiple robots may perform communication between robots and with network.
  • online cooperative high-resolution 3D map building may be explained.
  • This use case considers a low-energy (or energy-efficient) cooperation scenario to collaboratively build a 3D map among a group of multiple robots.
  • This use case may aim at usage for unstructured settings, such as enterprise building cleaning, preparation for disinfection of large-scale building, and automation for agriculture. With cooperation among multiple robots gathering measurement data, it would be possible to either save energy or build a better quality outcome, or to attain both.
  • map in this use case is not necessarily limited to geographic appearance but it may also include still life objects that are useful or essential for robots working in an irregular and/or unstructured setting.
  • a group of service robots that are equipped with capabilities of multi-dimensional ambient sensing, computing (standalone and/or via compute fabric), federation in learning and model building, and 3GPP subscription-based communication, are in cooperation for a single joint project.
  • the availability of communication service to/from edge may be threefold: not available, temporarily unavailable, or available (for certain period of time; positive interpretation although the term “available” does not mean “permanently available”).
  • this use case may be focused on ProSe-based operation (also, referred to as "ProSe-based”) with partial or intermittent connection to NG-RAN (or to edge server via NG-RAN).
  • the edge e.g., a server
  • the edge will assist them to alleviate their computational burdens (that are or are not within the scope of 3GPP), giving rise to a demand of accessing service-specific network slice(s) or other forms of network resources with certain performance requirements.
  • leader robot(s) include coordination required for the operation of the working group of service robots, such as acting as sync master for other robots (sync devices) within the working clock domain.
  • the application layer of the leader robot requests to adjust the clock synchronization target value within the clock synchronization budget.
  • the working group of robots may build up 3D map with only necessary level of accuracy so that they do not have to consume computing and communication resources to build up a 3D map of an area that is overly accurate.
  • FIG. 6a shows an example of inter-robot operation.
  • robot performs inter-robot operations based on multi-radio interface with other robots.
  • Robots may share intent and environmental data.
  • the robot may be accessible to network fabric via 3GPP system.
  • At least one of base stations(e.g., gNB) may be connected to edge (e.g., server).
  • edge e.g., server
  • robots may adjust the level of accuracy.
  • Robots may prevent potential noise factors that could have negatively contributed to the quality of 3D map with the help of prediction-based indication.
  • a robot that has instantaneously lost a connection can resume a connection very promptly and send time-critical information to other member(s).
  • 5G system is expected to be able to provide a means to ensure a very high accuracy level of clock synchronization to support that a group of service robots can build up 3D map collaboratively (i.e., synchronization among service robots within a collaborating group and synchronization among the multiple sources related to the respective service robots) in which the accuracy level is required by the applications layer.
  • 5G system is expected to be able to ensure the integrity and validity of clock synchronization for a designated length of time when a group of service robots are in ProSe-based operation outside the coverage area served by NG-RAN.
  • the time length may be dependent upon the type of project and is required by a service robot's application.
  • the 5G system is expected to notify the application.
  • 5G system is expected to be able to provide a means for UE(s) to adjust the accuracy level of clock synchronization.
  • 5G system is expected to be able to provide a means to share the accuracy level and integrity-related information of clock synchronization with the cloud (in Uu-based scenario) or with the leader robot (in ProSe-based scenario).
  • a network be able to provide a means to resume the connection when an ongoing connection is disrupted (e.g., due to radio link failure b/w a robot and the communicating counterpart) within a very short period of time, required by the applications layer.
  • resuming the connection when an ongoing connection is disrupted e.g., due to radio link failure b/w a robot and the communicating counterpart
  • required by the applications layer may be supported.
  • the current time period for securely reconnecting is required to be less than 1s.
  • robotic applications that perform critical roles may require much shorter time period, such as less than 100ms for critical, less than 10ms for highly critical.
  • a 5G system is expected to be able to provide a means to allow a member robot that has predicted communication disruption or measurement failure to disseminate necessary information, which is required by the applications layer, to one or more destinations within a very short period of time required by the applications layer.
  • CPG Challenge and Potential Gap
  • RRC Radio Resource Control
  • RRC-Inactive mode Radio Resource Control
  • 5G system Based on the request from the application (e.g., from an application of the leader robot in a robot group, or from an application in the cloud server), 5G system is expected to adjust the accuracy level of clock synchronization.
  • Possible scenarios regarding the referred robot group may include a group of "automated robots”, a group of “fully autonomous robots”, a group of “tele-operated robots”, and a group that consists of a suitable combination of those kinds of robots.
  • a network be able to provide a means to resume the connection when an ongoing connection is disrupted (e.g., due to radio link failure between a robot and the communicating counterpart) within a very short period of time, required by the applications layer.
  • the current time period for securely reconnecting is required to be less than 1s.
  • robotic applications in a UE e.g., a robot
  • the current time period for securely reconnecting may be less than 1s.
  • robotic applications in a UE e.g., a robot
  • resuming the connection when an ongoing connection is disrupted e.g., due to radio link failure b/w a robot and the communicating counterpart
  • a very short period of time required by the applications layer
  • a robot and a UE are used as a term with a same meaning in the present disclosure.
  • a group of Robots may attempt to form a Group Communication group.
  • the group communication group may be Group Communication System Enablers (GCSE) group.
  • GCSE Group Communication System Enablers
  • the UE and the network may use eMBMS bears or to use unicast bearers or to use Protocol Data Unit (PDU) session.
  • PDU Protocol Data Unit
  • FIG. 7 illustrates an example of CBRA with 4-step RA type.
  • FIG. 8 illustrates an example of CBRA with 2-step RA type.
  • RA Random Access
  • the type of RA may be CBRA with 4-step RA type according to FIG. 7 or CBRA with 2-step RA type according to FIG. 8.
  • the UE may perform RA procedure based on FIG. 8.
  • MSGA may mean message A which corresponds to random access preamble and PUSCH payload.
  • the term "MsgA" is part of a procedure aimed at reducing latency and control-signaling overhead by minimizing the number of messages transmitted during the access phase. This process involves a preamble sent via the physical random access channel (PRACH) and additional data through the physical uplink shared channel (PUSCH). If the random access procedure with 2-step RA type is not completed after a number of MSGA transmissions by the UE, the UE can be configured to switch to CBRA with 4-step RA type. Then, the UE performs RA procedure based on FIG. 7.
  • PRACH physical random access channel
  • PUSCH physical uplink shared channel
  • the first example of the present disclosure includes operations based on working with Robot server and gNB.
  • a Robot (say, Robot 1/UE 1) completes Random Access procedure. Once the robot completes the random access procedure, the robot may perform operations based on a certain task.
  • the Robot shall transmit a request message to a server so that the Robot can be arranged by the server to receive a higher priority from gNB (or base station) to recover the connection from communication disruption if it happens.
  • the robot may transmit a request message for a fast recovery to a robot server so that the robot server takes actions to RAN (e.g., gNB or AMF in Core Network) to provide a higher priority to this UE (or this Robot) when the Robot needs to attempt for reconnection or recovery of the lost or disrupted connection.
  • the request message may be a fast_recovery_ra_request message.
  • the request message may include the gNB id information (e.g., cell ID in RA-Report) for the Robot server.
  • RA-Report may mean a RA report message.
  • the robot server can be aware of which gNB to contact when necessary.
  • the robot server is an example of a server that the UE can communicate with. The scope of the present disclosure is not limited to the term "robot server".
  • a server e.g., Robot server
  • the server request the indicated gNB to assign a preamble dedicated to the Robot (Robot 1) for a designated time period (e.g., T1). If the time period is not specified, the time period may be unlimited or be equal to a predetermined value.
  • the gNB may assign the dedicated preamble to the robot.
  • the gNB transmit a information including the dedicated preamble and the designated time period info (if there is no designated time period, the field can be empty when sending out to the Robot) to the robot.
  • the first example of the present disclosure may be performed based on the example of FIGS. 9a and 9b.
  • FIGS. 9a and 9b illustrates an example of operations for the first example of the present disclosure.
  • UE 1 Before step S901, UE 1 has performed random access procedure. For example, UE 1 may have performed the random access procedure based on FIGS. 5a to 5e.
  • gNB transmits contention resolution message or random access response message of the RA procedure to UE 1.
  • the message may be any message informs the UE that the random access is completed.
  • the message may include threshold 1 value.
  • threshold 1 value may be a time sensitive application criterion. Threshold 1 value may be used for comparing the required disruption time of an application of UE1 with threshold1.
  • communication layer of UE 1 transmits threshold1 value to application of UE 1.
  • S902 may be skipped because communication layer and applications are all included in a processor in the UE.
  • S902 may be a logical step of transmitting data within UE1.
  • the UE determines whether a required disruption time of the current application is less than threshold 1 value or not. If the required disruption time is less than threshold 1 value, the UE performs step S904. If the required disruption time is equal to or less than threshold 1 value, the UE does not perform step S904.
  • UE 1 transmits request message to server via gNB.
  • the request message may be fast_recovery_ra_request.
  • the server transmits response message including time value, which is time length T1.
  • the response message may be fast_recovery_allow_request message.
  • the response message may mean that a RA for fat recovery is allowed for UE 1.
  • gNB may determine whether dedicated resource is available for UE 1 or not. If the dedicated resource is not available, the gNB transmits information related to that the request is rejected to UE 1 and the server. If the dedicated resource is available, the gNB performs step S907.
  • the gNB may transmit information related to the fact that the request is accepted to the server.
  • the gNB may transmit information related to that dedicated resource is assigned for UE1 to UE1.
  • the information may include dedicated preamble information for UE1.
  • step S908 if T1 expires, the UE 1 perform step S904. If T1 does not expire, UE1 may perform S909.
  • disruption may happen for the current applications. Due to disruption, UE 1 buffers Uplink (UL) traffic.
  • UL Uplink
  • the gNB buffers downlink (DL) traffic.
  • UE1 performs random access procedure based on the assigned dedicated resources (e.g., dedicated preamble). UE 1 can use contention-free random access for securely reconnecting to the gNB.
  • dedicated resources e.g., dedicated preamble
  • the second example of the present disclosure includes operations based on working with gNB.
  • a Robot (say, Robot 1/UE 1) completes Random Access procedure. Once the robot completes the random access procedure, the robot may perform operations based on a certain task.
  • the Robot shall transmit a request message to a server.
  • the robot may transmit a request message for a fast recovery to a gNB.
  • the request message may be a fast_recovery_ra_request message.
  • the gNB may check whether it's available to assign a dedicated preamble to the Robot (Robot 1) for a designated time period (e.g., T1). If the time period is not specified, the time period may be unlimited or be equal to a predetermined value.
  • a dedicated preamble to the Robot Robot 1
  • T1 a designated time period
  • the second example of the present disclosure may be performed based on the example of FIG. 10.
  • gNB transmits contention resolution message or random access response message of the RA procedure to UE 1.
  • the message may be any message informs the UE that the random access is completed.
  • the message may include threshold 1 value.
  • threshold 1 value may be a time sensitive application criterion. Threshold 1 value may be used for comparing the required disruption time of an application of UE1 with threshold1.
  • communication layer of UE 1 transmits threshold1 value to application of UE 1.
  • S1002 may be skipped because communication layer and applications are all included in a processor in the UE.
  • S1002 may be a logical step of transmitting data within UE1.
  • the UE determines whether a required disruption time of the current application is less than threshold 1 value or not. If the required disruption time is less than threshold 1 value, the UE performs step S1004. If the required disruption time is equal to or less than threshold 1 value, the UE does not perform step S1004.
  • UE 1 transmits request message to a gNB.
  • the request message may be fast_recovery_ra_request.
  • gNB may determine whether dedicated resource is available for UE 1 or not. If the dedicated resource is not available, the gNB transmits information related to that the request is rejected to UE 1. If the dedicated resource is available, the gNB performs step S1006.
  • the gNB may transmit information related to that dedicated resource is assigned for UE1 to UE1.
  • the information may include dedicated preamble information for UE1.
  • step S1007 if T1 expires, the UE 1 perform step S1004. If T1 does not expire, UE1 may perform S1008.
  • disruption may happen for the current applications. Due to disruption, UE 1 buffers Uplink (UL) traffic.
  • UL Uplink
  • the gNB buffers downlink (DL) traffic.
  • UE1 performs random access procedure based on the assigned dedicated resources (e.g., dedicated preamble). UE 1 can use contention-free random access for securely reconnecting to the gNB.
  • dedicated resources e.g., dedicated preamble
  • the detailed procedure for a gNB to assign a dedicated preamble for the Robot is supported. So that the Robot can perform a CFRA to the same gNB, based on the dedicated preamble, when disruption has happened.
  • the UE (Robot) shall send a fast_recovery_ra_request message to Robot server.
  • the UE (Robot) shall send a fast_recovery_ra_request message to gNB.
  • the Robot server requests the gNB to check if it's possible for the gNB to assign a dedicated preamble to the Robot.
  • the gNB may check and assign one, if available. This can allow the Robot to perform a CFRA and to be able to recover the connectivity status (e.g., connection that has just been lost) as fast as possible.
  • the gNB check if it's possible to assign a dedicated preamble to the Robot. If possible, the gNB assign a dedicated preamble so that the Robot (UE) can be aware of and can use the dedicated preamble when certain disruption happens. This can allow the Robot to perform a CFRA and to be able to recover the connectivity status (e.g., connection that has just been lost) as fast as possible.
  • the connectivity status e.g., connection that has just been lost
  • fast_recovery_ra_request message can include the following:
  • UE ID e.g., UICC, IMSI, etc.
  • Disruption time limit (if defined).
  • fast_recovery_allow_request message can include the following:
  • UE ID e.g., UICC, IMSI, etc.
  • FIG. 11 illustrates an example of operations according to an embodiment of the present disclosure.
  • the base station may transmit response message to the UE.
  • the response message includes threshold value related to a criterion for a time sensitive application.
  • the UE may determine whether required disruption time related to the application is less than the threshold value or not.
  • step S1103 is performed.
  • the base station may communicate with a server(e.g., a robot server).
  • the base station may transmit the request message to the server.
  • the base station may receive a response message including threshold value related to a criterion for a time sensitive application from the server.
  • instructions for performing the operation of the network node or base station described in the present disclosure of the present specification may be stored in a non-volatile (or non-transitory) computer-readable storage medium.
  • the storage medium may be included in one or more memories 104 or 204.
  • the instructions recorded in the storage medium are executed by one or more processors 102 or 202, so that the operations of a network node or base station are performed.

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

Abstract

La présente divulgation concerne un procédé mis en œuvre par un UE. Le procédé peut consister à : transmettre un préambule d'accès aléatoire à une station de base ; recevoir, en provenance de la station de base, un message de réponse en réponse au préambule d'accès aléatoire ; transmettre un message de requête relatif à une mise en réseau sensible au temps de récupération de connexion rapide à la station de base, sur la base d'une application de l'UE ; et recevoir, en provenance de la station de base, des informations relatives au préambule dédié.
PCT/KR2024/010345 2023-09-18 2024-07-18 Communication basée sur un accès aléatoire Pending WO2025063465A1 (fr)

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US63/538,854 2023-09-18
US202363545549P 2023-10-24 2023-10-24
US63/545,549 2023-10-24

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Citations (4)

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CN112492646A (zh) * 2020-11-27 2021-03-12 清华大学 基于拥塞成因识别的拥塞控制方法及装置
WO2022085772A1 (fr) * 2020-10-22 2022-04-28 Toyota Jidosha Kabushiki Kaisha Compensation du délai de propagation pour les réseaux sensibles au temps
WO2023006514A1 (fr) * 2021-07-30 2023-02-02 Nokia Technologies Oy Configuration de repli conditionnel pour mcg-rlf
US20230100878A1 (en) * 2020-05-06 2023-03-30 Shanghai Langbo Communication Technology Company Limited Method and device in communication node for wireless communication

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US20230100878A1 (en) * 2020-05-06 2023-03-30 Shanghai Langbo Communication Technology Company Limited Method and device in communication node for wireless communication
WO2022085772A1 (fr) * 2020-10-22 2022-04-28 Toyota Jidosha Kabushiki Kaisha Compensation du délai de propagation pour les réseaux sensibles au temps
CN112492646A (zh) * 2020-11-27 2021-03-12 清华大学 基于拥塞成因识别的拥塞控制方法及装置
WO2023006514A1 (fr) * 2021-07-30 2023-02-02 Nokia Technologies Oy Configuration de repli conditionnel pour mcg-rlf

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