WO2023077456A1 - Procédé d'accès aléatoire, dispositif terminal et dispositif de réseau - Google Patents

Procédé d'accès aléatoire, dispositif terminal et dispositif de réseau Download PDF

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Publication number
WO2023077456A1
WO2023077456A1 PCT/CN2021/129097 CN2021129097W WO2023077456A1 WO 2023077456 A1 WO2023077456 A1 WO 2023077456A1 CN 2021129097 W CN2021129097 W CN 2021129097W WO 2023077456 A1 WO2023077456 A1 WO 2023077456A1
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WIPO (PCT)
Prior art keywords
message
kmac
time
window
random access
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PCT/CN2021/129097
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English (en)
Chinese (zh)
Inventor
马东俊
赵楠德
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Oppo广东移动通信有限公司
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Priority to PCT/CN2021/129097 priority Critical patent/WO2023077456A1/fr
Priority to CN202180099377.5A priority patent/CN117501795A/zh
Publication of WO2023077456A1 publication Critical patent/WO2023077456A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the embodiment of the present application relates to the communication field, and more specifically, relates to a random access method, a terminal device, and a network device.
  • the terminal device needs to advance the timing advance (Timing Advance, TA) to send the uplink signal to ensure that the signal arrives at the network device side at the correct time .
  • Timing Advance Timing Advance
  • TA Timing Advance
  • RAR Random Access Response
  • an offset value can be introduced to enhance the existing timing relationship.
  • 3rd Generation Partnership Project 3rd Generation Partnership Project, 3GPP
  • UE-gNBRound Trip Time UE-gNB RTT
  • the start time of the enhanced RAR Window may be later than the start time of the actual RAR window, resulting in information loss.
  • the embodiment of the present application provides a random access method, a terminal device and a network device, which help to avoid loss of RAR information, improve the probability of successful random access, and further improve the efficiency of data transmission.
  • a method for random access includes:
  • a response message to the first message is received in the first window.
  • a random access method includes:
  • a response message to the first message is received within the first window.
  • a method for random access includes:
  • Send configuration information where the configuration information is used to configure the value of the time delay Kmac, where the time-domain resource granularity of the time delay Kmac is a symbol, or T c .
  • a terminal device including:
  • a communication unit configured to send the first message according to the timing advance T TA ;
  • a processing unit configured to determine the start time and length of the first window according to the timing advance T TA and the time delay Kmac between the network device and the reference point;
  • the communication unit is further configured to receive a response message to the first message in the first window.
  • a terminal device including:
  • a communication unit configured to send the first message according to the timing advance T TA ;
  • a processing unit configured to determine the starting moment of the first window according to the timing advance T TA and the time delay Kmac between the network device and the reference point, wherein the time domain resource granularity of the time delay Kmac is smaller than a time slot ;
  • the communication unit is further configured to receive a response message to the first message within the first window.
  • a network device including:
  • a communication unit configured to send configuration information, where the configuration information is used to configure the value of the time delay Kmac, where the time-domain resource granularity of the time delay Kmac is a symbol, or T c .
  • a terminal device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the first aspect or the second aspect above.
  • a network device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the third aspect above.
  • an apparatus for implementing the method in any one of the above first to third aspects.
  • the device includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the device executes the method in any one of the first to third aspects above.
  • a computer-readable storage medium for storing a computer program, and the computer program causes a computer to execute the method in any one of the first to third aspects above.
  • a computer program product including computer program instructions, the computer program instructions cause a computer to execute the method in any one of the above first to third aspects.
  • a computer program which, when running on a computer, causes the computer to execute the method in any one of the first to third aspects above.
  • FIG. 1 is a schematic diagram of a communication system architecture applied in an embodiment of the present application.
  • Fig. 2 is a schematic diagram of a transparent forwarding satellite network architecture provided by the present application.
  • Fig. 3 is a schematic diagram of a regenerative and forwarding satellite network architecture provided by the present application.
  • FIG. 4 is a schematic flowchart of a 4-step RACH method.
  • FIG. 5 is a schematic flowchart of a 2-step RACH method.
  • Fig. 6 is a schematic diagram of time domain resources provided by the embodiment of the present application.
  • Fig. 7 is a schematic interactive flowchart of a random access method provided according to an embodiment of the present application.
  • Fig. 8 is a schematic diagram of a time-domain resource of a solution for enhancing RARwindow according to an embodiment of the present application.
  • Fig. 9 is a schematic diagram of another time-domain resource of the solution for enhancing RARwindow according to an embodiment of the present application.
  • Fig. 10 is a schematic diagram of another time-domain resource of the solution for enhancing RARwindow according to an embodiment of the present application.
  • Fig. 11 is a schematic interaction flowchart of another random access method provided according to an embodiment of the present application.
  • Fig. 12 is a schematic interaction flowchart of another random access method provided according to an embodiment of the present application.
  • Fig. 13 is a schematic block diagram of a terminal device provided according to an embodiment of the present application.
  • Fig. 14 is a schematic block diagram of a network device provided according to an embodiment of the present application.
  • Fig. 15 is a schematic block diagram of a communication device provided according to an embodiment of the present application.
  • Fig. 16 is a schematic block diagram of a device provided according to an embodiment of the present application.
  • Fig. 17 is a schematic block diagram of a communication system provided according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced long term evolution
  • NR New Radio
  • NTN Non-Terrestrial Networks
  • UMTS Universal Mobile Telecommunications System
  • WLAN Wireless Local Area Networks
  • IoT Internet of Things
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • V2V Vehicle to Vehicle
  • V2X Vehicle to everything
  • the communication system in the embodiment of the present application can be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, can also be applied to a dual connectivity (Dual Connectivity, DC) scenario, and can also be applied to an independent (Standalone, SA ) meshing scene.
  • Carrier Aggregation, CA Carrier Aggregation
  • DC Dual Connectivity
  • SA independent meshing scene
  • the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, where the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to a licensed spectrum, Wherein, the licensed spectrum can also be regarded as a non-shared spectrum.
  • the embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, wherein the terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • user equipment User Equipment, UE
  • access terminal user unit
  • user station mobile station
  • mobile station mobile station
  • remote station remote terminal
  • mobile device user terminal
  • terminal wireless communication device
  • wireless communication device user agent or user device
  • a terminal device can be a station (STATION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, next-generation communication systems such as terminal devices in NR networks, or future Terminal equipment in the evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.
  • PLMN Public Land Mobile Network
  • the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites) superior).
  • the terminal device may be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, an augmented reality (Augmented Reality, AR) terminal Equipment, wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city or wireless terminal equipment in smart home, vehicle communication equipment, wireless communication chip/application-specific integrated circuit (application specific integrated circuit, ASIC)/system-on-chip (System on Chip, SoC), etc.
  • a virtual reality (Virtual Reality, VR) terminal device an augmented reality (Augmented Reality, AR) terminal Equipment
  • wireless terminal equipment in industrial control wireless terminal equipment in self driving
  • wireless terminal equipment in remote medical wireless terminal equipment in smart grid
  • wireless terminal equipment in transportation safety wireless terminal equipment in smart city or wireless terminal equipment in smart home
  • vehicle communication equipment wireless communication chip/application-specific integrated circuit (application specific integrated circuit, ASIC
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices, which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets and smart jewelry for physical sign monitoring.
  • the network device may be a device used to communicate with the mobile device, and the network device may be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA , it can also be a base station (NodeB, NB) in WCDMA, or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and an NR network A network device or a base station (gNB) in a network device or a network device in a future evolved PLMN network or a network device in an NTN network.
  • AP Access Point
  • BTS Base Transceiver Station
  • the network device may have a mobile feature, for example, the network device may be a mobile device.
  • the network equipment may be a satellite, balloon station.
  • the satellite can be a low earth orbit (low earth orbit, LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous earth orbit (geosynchronous earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite. ) Satellite etc.
  • the network device may also be a base station installed on land, in water, or other locations.
  • the network device may provide services for a cell, and the terminal device communicates with the network device through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device ( For example, a cell corresponding to a base station), the cell may belong to a macro base station, or may belong to a base station corresponding to a small cell (Small cell), and the small cell here may include: a metro cell (Metro cell), a micro cell (Micro cell), a pico cell ( Pico cell), Femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • the transmission resources for example, frequency domain resources, or spectrum resources
  • the cell may be a network device (
  • the cell may belong to a macro base station, or may belong to a base station corresponding to a small cell (Small cell)
  • the small cell here may include: a metro cell (Metro cell), a micro cell (Micro
  • the communication system 100 may include a network device 110, and the network device 110 may be a device for communicating with a terminal device 120 (or called a communication terminal, terminal).
  • the network device 110 can provide communication coverage for a specific geographical area, and can communicate with terminal devices located in the coverage area.
  • FIG. 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within the coverage area. This embodiment of the present application does not limit it.
  • the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment of the present application.
  • a device with a communication function in the network/system in the embodiment of the present application may be referred to as a communication device.
  • the communication equipment may include a network equipment 110 and a terminal equipment 120 with communication functions.
  • the network equipment 110 and the terminal equipment 120 may be the specific equipment described above, and will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities and other network entities, which are not limited in this embodiment of the present application.
  • the "indication" mentioned in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship.
  • a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.
  • the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and is configuration etc.
  • predefinition can be realized by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices).
  • the implementation method is not limited.
  • pre-defined may refer to defined in the protocol.
  • the "protocol” may refer to a standard protocol in the communication field, for example, may include the LTE protocol, the NR protocol, and related protocols applied to future communication systems, which is not limited in the present application.
  • Non-terrestrial communication network generally uses satellite communication to provide communication services to ground users.
  • satellite communication Compared with terrestrial cellular network communication, satellite communication has many unique advantages. First of all, satellite communication is not restricted by the user's region. For example, general land communication cannot cover areas such as oceans, mountains, deserts, etc. that cannot be equipped with communication equipment or are not covered by communication due to sparse population. For satellite communication, due to a Satellites can cover a large area of the ground, and satellites can orbit the earth, so theoretically every corner of the earth can be covered by satellite communications. Secondly, satellite communication has great social value.
  • Satellite communication can be covered at a lower cost in remote mountainous areas, poor and backward countries or regions, so that people in these regions can enjoy advanced voice communication and mobile Internet technology, which is conducive to narrowing the digital gap with developed regions and promoting development of these areas.
  • the distance of satellite communication is long, and the cost of communication does not increase significantly with the increase of communication distance; finally, the stability of satellite communication is high, and it is not limited by natural disasters.
  • Communication satellites are divided into Low-Earth Orbit (LEO) satellites, Medium-Earth Orbit (MEO) satellites, Geostationary Earth Orbit (GEO) satellites, and high elliptical orbit satellites according to their orbital heights. (High Elliptical Orbit, HEO) satellites and so on.
  • LEO Low-Earth Orbit
  • MEO Medium-Earth Orbit
  • GEO Geostationary Earth Orbit
  • HEO High Elliptical Orbit
  • the altitude range of low-orbit satellites is 500km to 1500km, and the corresponding orbital period is about 1.5 hours to 2 hours.
  • the signal propagation delay of single-hop communication between users is generally less than 20ms.
  • the maximum satellite visible time is 20 minutes.
  • the signal propagation distance is short, the link loss is small, and the requirements for the transmission power of the user terminal are not high.
  • Satellites in geosynchronous orbit have an orbital altitude of 35786km and a period of 24 hours around the earth.
  • the signal propagation delay of single-hop communication between users is generally 250ms.
  • satellites use multi-beams to cover the ground.
  • a satellite can form dozens or even hundreds of beams to cover the ground; a satellite beam can cover tens to hundreds of kilometers in diameter. ground area.
  • the feeder link refers to the wireless link between the satellite and the NTN gateway (usually located on the ground).
  • the wireless transmission service does not require high transmission delay, and the MBB service package transmitted each time is relatively large, and the corresponding overhead ratio of the control channel accompanying the data channel transmission is relatively large. Therefore, when a traditional idle (IDLE)/inactive (INACTIVE) state terminal wants to initiate random access, it usually uses a four-step (4-step) random access channel (random access channel, RACH) process to complete random access. into the process.
  • RACH random access channel
  • FIG. 4 shows a schematic flowchart of a method 400 for 4-step RACH.
  • the method 400 of the 4-step RACH includes 410 to 440.
  • the terminal device sends a message 1 (Msg1), where Msg1 includes a random access preamble.
  • Msg1 may include a physical random access channel (Physical random access Channel, PRACH), and the PRACH includes the above random access preamble, which is not limited.
  • PRACH Physical random access Channel
  • the terminal device receives the Msg2 sent by the network device.
  • the response corresponding to the preamble included in the Msg2 is generally called a random access response (RACH response, RAR).
  • RACH response RAR
  • the RAR is carried by a PDSCH scheduled by a physical downlink control channel (Physical Downlink Control Channel, PDCCH) scrambled by (random access radio network temporary identifier, RA-RNTI).
  • PDCCH Physical Downlink Control Channel
  • RA-RNTI random access radio network temporary identifier
  • the terminal device sends a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH), namely Msg3, according to the uplink grant (UL grant) of the RAR, carrying information such as user identification information and RRC connection request for contention conflict resolution.
  • PUSCH Physical Uplink Shared Channel
  • the terminal device may carry user-side data information in the PUSCH of Msg3.
  • the terminal device receives a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH), that is, Msg4, sent by the network device.
  • PDSCH Physical Downlink Shared Channel
  • the PDSCH is scheduled using a PDCCH scrambled by the TC-RNTI.
  • the PDSCH includes feedback information for Msg3, and the feedback information includes user identification information sent by the terminal equipment, RRC connection establishment and other information.
  • FIG. 5 shows a schematic flowchart of a method 500 for 2-step RACH.
  • the method 500 of the 2-step RACH includes 510 and 520.
  • the terminal device sends a message A (MsgA), where MsgA includes a random access preamble and a PUSCH.
  • MsgA includes a random access preamble and a PUSCH.
  • the MsgA may include a PRACH and a PUSCH, and the PRACH includes the above random access preamble, which is not limited. That is to say, sending MsgA in step 510 is equivalent to sending Msg1 and Msg3 in the 4-step RACH.
  • the terminal device receives a response message B (MsgB) sent by the network device and directed to MsgA.
  • MsgB response message B
  • the MsgB includes at least one of a response to the preamble and a response to the PUSCH
  • the response to the random access preamble (preamble) in the MsgB may also be called a random access response RAR.
  • the RAR may include at least one of a timing advance (timing advancement, TA), a temporary intra-cell network temporary identifier (temporary C-RNTI, TC-RNTI), an uplink grant (UL grant) and a preamble index (preamble index) A sort of.
  • the response to the PUSCH is, for example, a contention resolution message (CRM), which mainly includes at least one of identification information of the terminal device, RRC connection (re-) setup (connection (re-) setup) information, and the like.
  • CCM contention resolution message
  • the 2-step RACH solution can be applied to multiple scenarios, such as IDLE state, INACTIVE state, and active (ACTIVE) state scenarios.
  • scenarios such as IDLE state, INACTIVE state, and active (ACTIVE) state scenarios.
  • IDLE state IDLE state
  • INACTIVE state INACTIVE state
  • active (ACTIVE) state scenarios active (ACTIVE) state scenarios.
  • the description of each scenario is as follows:
  • IDLE state There is no RRC connection, and the terminal device does not have any context information on the network device side.
  • the purpose of the random access initiated by this type of terminal device may be synchronization, connection establishment request, data transmission and so on.
  • INACTIVE state There is no RRC connection, and the terminal device has context information on the network side.
  • the purpose of the random access initiated by this type of terminal device may be synchronization, state transition, data transmission, and so on.
  • ACTIVE state There is an RRC connection and a cell radio network temporary identifier (C-RNTI). Such terminals may initiate random access for purposes of synchronization, beam scanning, cell handover, data transmission, and the like.
  • C-RNTI cell radio network temporary identifier
  • the terminal device since the transmission delay between the network device and the terminal device is very large, the terminal device needs to send an uplink signal in advance of TA, such as the above-mentioned Msg1 or MsgA.
  • TA uplink signal
  • Msg1 or MsgA uplink signal
  • the terminal device receives RAR information in the RAR window
  • the start time of the RAR window will be advanced accordingly due to the application of TA. This behavior will cause the incomplete reception of RAR information in the RAR window.
  • UE-gNB RTT is introduced to ensure that the terminal device receives the RAR information correctly. As shown in FIG.
  • FIG. 6 shows a schematic diagram of downlink (downlink, DL) time domain resources of a UE.
  • (c) shows another schematic diagram of UL time domain resources of UE, where T TA is not 0.
  • T TA when T TA is too large, the RAR window start time appears at PDCCH monitoring time 1, so UE-gNB RTT is introduced to enhance the existing RAR window start time to ensure that the RAR window start time is at Monitoring time 2 of PDCCH.
  • the UE-gNB RTT is equal to the sum of T TA and the delay Kmac between the network equipment and the reference point.
  • the starting moment of the RAR Window is enhanced according to the existing UE-gNB RTT, because in the discussion of the 3GPP standard, the time domain resource granularity of Kmac has been determined to be a time slot, which is more granular than the existing In the protocol, the granularity of delaying the start time of the RAR Window according to the granularity of the symbol level is large, so the start time of the enhanced RAR Window may be later than the start time of the actual RAR window, which will cause some RAR information to be unreceived , may cause RAR to fail.
  • the present application proposes a scheme to enhance the start time of the RAR window, by determining the start time of the random access response RAR window and The length of the RAR window realizes the enhancement of the initial moment of the RAR window, which helps to avoid loss of RAR information, improves the probability of successful random access, and improves the efficiency of data transmission.
  • FIG. 7 is a schematic interactive flowchart of a random access method 700 according to an embodiment of the present application. As shown in FIG. 7 , the random access method 700 may include at least part of the following content:
  • the first message may be, for example, a signal on an uplink channel used for random access, such as Msg1 in the 4-step RACH in Figure 4, or MsgA in the 2-step RACH in Figure 5, without limitation .
  • the timing advance T TA may be predefined, for example, defined in a protocol, or configured by a network device through signaling, which is not limited in this application.
  • T TA can refer to the following formula (1)
  • T TA (N TA +N TA,UE-specific +N TA,common +N TA,offset ) ⁇ T c (1)
  • N TA is obtained from user-specific TA self-estimation.
  • N TA is defined as 0, and according to the TA command field in msg2/msgB and MAC CE (Media Access Control Element, MAC CE) command to update.
  • MAC CE Media Access Control Control Element
  • N TA UE-specific is estimated by the UE itself and is used to pre-compensate the delay of the service link.
  • N TA,common is the time delay between the satellite and the reference point, if the network broadcasts this value, this value is obtained from at least the common timing offset value, and may also include some timing offset on the network side, N TA,common The value can be 0.
  • N TA,offset is a fixed offset value used to calculate the timing advance.
  • T c refers to the 3GPP TS 38.211 protocol and is defined as follows:
  • ⁇ f max 480 ⁇ 10 3 Hz
  • N f 4096.
  • the reference point may be configured at any position on the service link or the feeder link.
  • the timing relationship between the uplink transmission and downlink transmission of the terminal equipment, and the uplink transmission and downlink transmission of the network equipment are all aligned at the reference point.
  • the above-mentioned first window is a window for random access, for example, may include a RAR window.
  • the initial moment of RARwindow starts from the first symbol of the resource set (Control-resource set, CORESET) of the earliest control information, and the CORESET is configured to receive the Type1-PDCCH common search space set (Common search space, CSS) set PDCCH.
  • the earliest CORESET is at least one symbol after the last symbol of the PRACH transmission opportunity corresponding to the PRACH transmission.
  • a symbol is a granularity of time-domain resources.
  • one time slot may include 14 symbols.
  • the start time of the first window can be determined according to the timing advance T TA , and according to the network
  • the time delay Kmac between the device and the reference point extends the length of the second window (that is, the window before enhancement) to obtain the above-mentioned first window, that is, the length of the enhanced window.
  • the time-domain resource granularity of the delay Kmac between the network device and the reference point may be a time slot, or smaller than a time slot, such as a symbol or Tc , which is not limited in this application.
  • the time-domain resource granularity of the time delay Kmac between the network device and the reference point may be the same as the time-domain resource granularity of the timing advance T TA , which is not limited in this application.
  • the second window length may be configured by a network device through signaling, or may be predefined by a protocol, which is not limited in this application.
  • the length of the first window is less than or equal to the sum of the length of the second window and the time delay Kmac between the network device and the reference point. Meanwhile, the length of the first window is greater than the length of the second window.
  • FIG. 8 shows a schematic diagram of a time-domain resource applying the scheme of enhancing the RAR window according to the embodiment of the present application.
  • (b) is a schematic diagram of UE UL time domain resource enhanced by UE-gNB RTT in advance of T TA and the start moment of RARwindow according to UE-gNB RTT, where the start moment #2 is the start of RARwindow according to UE-gNB RTT The starting moment after the moment is augmented.
  • T TA is 4 UL time slots
  • Kmac is 2 time slots. It may be because the resource granularity of Kmac is time slots, and in the existing standard protocol, the starting time of RARwindow is determined at the granularity of symbol level The method gap is too large, so that the enhanced RAR window start time #2 will be later than the actual RAR window start time #3, that is, the RAR window start time #2 is offset backward from the actual RAR window start time #3, resulting in loss Problems with RAR information.
  • T TA is advanced for UL
  • the start time of RAR window is enhanced according to T TA
  • the length of RAR window is extended according to Kmac.
  • the starting moment #4 of the enhanced RARwindow#2 is ahead of Kmac relative to the starting moment #2, but at the same time, the length of the enhanced RARwindow#2 is longer than the Kmac of RARwindow#1 to compensate Due to the early starting time of RARwindow, the RAR information may not be detected.
  • the enhanced RARwindow scheme of (c) in Fig. 8 can help to avoid the situation that the starting moment #4 of the enhanced RARwindow #2 is later than the starting moment of the actual RARwindow, and further by extending the RARwindow The length can help to ensure that the RAR information is correctly received in the enhanced RAR window #2, and is helpful for successful random access.
  • the time-domain resource granularity of the timing advance T TA is T C , and T C is smaller than the time slot. Therefore, when the starting time of the window is enhanced according to T TA , the granularity of the starting time of the enhanced window will also be is smaller than a time slot, that is, the embodiment of the present application can enhance the starting moment of the window according to the finer time-domain resource granularity compared with the time slot, and further extend the length of the second window according to the delay Kmac, so as to ensure that Correctly receiving information within a window contributes to successful random access.
  • the second window can be determined according to the timing advance T TA and the delay Kmac between the network device and the reference point.
  • the starting moment of a window wherein, the time domain resource granularity of the time delay Kmac between the network device and the reference point is smaller than the time slot.
  • the length of the first window may be the same as that of the second window.
  • the time-domain resource granularity of the time delay Kmac between the network device and the reference point may be a time-domain resource symbol (abbreviated as symbol), or T c , which is not limited.
  • the time-domain resource granularity of the time delay Kmac between the network device and the reference point may be predefined as symbol or T c , which is not limited.
  • T c can refer to the description above, and will not be repeated here.
  • the time-domain resource granularity of the time delay Kmac between the network device and the reference point may be the same as the time-domain resource granularity of the timing advance T TA , for example, T c .
  • the time-domain resource granularity of the time delay Kmac between the network device and the reference point may be predefined to be the same as the time-domain resource granularity of the timing advance T TA .
  • T c can refer to the description above, and will not be repeated here.
  • method 700 may also include:
  • the network device sends configuration information to the terminal device, where the configuration information is used to configure the value of the time delay Kmac between the network device and the reference point, where the time-domain resource granularity of the time delay Kmac is a symbol, or T c .
  • the terminal device receives the configuration information, and can determine the time delay Kmac between the network device and the reference point according to the configuration information.
  • the network device may send the foregoing configuration information through a broadcast message, and correspondingly, the terminal device may receive the broadcast message and obtain the configuration information from the broadcast message.
  • step 715 may be performed before step 720, for example, may be performed before step 710 or after step 710, which is not limited.
  • the time-domain resource granularity of the delay Kmac between the network device and the reference point is time slot
  • the UE-gNB RTT is the timing advance T TA and the delay Kmac between the network device and the reference point
  • the sum of , so the granularity of the starting moment of the enhancement window will also be the time slot. Since the granularity of the time domain resource of the time slot is relatively large, there may be a problem that the starting time of the enhanced window is shifted too much backward, resulting in the loss of part or all of the information, resulting in the failure of random access information detection.
  • the time domain resource granularity of the time delay Kmac between the network device and the reference point is smaller than the time slot, when the UE-gNB RTT enhances the starting moment of the window, the granularity of the starting moment of the enhanced window It will also be smaller than the time slot, that is, the starting time of the window can be enhanced according to the finer time-domain resource granularity compared with the time slot, which can help avoid the starting time of the enhanced window from shifting too much backward Problems causing loss of some or all of the information contribute to successful random access.
  • FIG. 9 shows another schematic diagram of time-domain resources applying the solution of enhancing the RAR window according to the embodiment of the present application.
  • Kmac#1 in Figure 8 is defined as the time slot as the time domain resource granularity
  • RTT#1 is the sum of T TA and Kmac#1
  • the time domain resource granularity of Kmac#2 in Figure 9 is defined It is smaller than a time slot, such as a time-domain resource symbol or T C , etc., and is not limited
  • RTT #2 is the sum of T TA and Kmac #2.
  • (c) is a schematic diagram of UE UL time-domain resources in which T TA is advanced for UL and the start time of RARwindow is enhanced according to RTT#2.
  • Kmac#2 since the time domain resource granularity of Kmac#2 is finer, Kmac#2 is smaller than Kmac#1 whose time domain resource granularity is time slot, so the starting moment #4 of the enhanced RARwindow#3 is relatively
  • the start time #2 is more accurate, and then the start time #4 can be advanced by several symbols or T C relative to the start time #2, so it can help to avoid the start time #4 of the enhanced RAR window #3 being late
  • T C time
  • the timing advance T TA and the time between the network device and the reference point can be Delay Kmac to determine the starting moment of the first window, and at the same time, extend the length of the second window according to the delay Kmac to obtain the length of the enhanced first window.
  • FIG. 10 shows a schematic diagram of another time-domain resource applying the solution of enhancing the RAR window according to the embodiment of the present application.
  • (a) and (b) are similar to those in Fig. 9 and will not be repeated here.
  • the difference from Figure 9 is that in Figure 10 (c) advances T TA for UL, and enhances the start time of RARwindow according to RTT#2, and extends the length of RARwindow according to Kmac#2 UE UL A schematic diagram of time domain resources.
  • the enhanced RAR window #4 has a more accurate start time #4 than the start time #2, and then the start time #4 can be several times earlier than the start time #2 symbols or T C .
  • the length of RARwindow#4 is longer than that of RARwindow#3 or RARwindow#1 by Kmac#2, so it can help to avoid the situation that the starting moment #4 of the enhanced RARwindow#3 is later than the starting moment of the actual RAR window.
  • further extending the length of RARwindow#4 can help to ensure correct reception of RAR information in the enhanced RARwindow#4, and help to perform random access successfully.
  • the response message of the first message may be Msg2 in the 4-step RACH .
  • the response message of the first message may be the signal in the 2-step RACH MsgB.
  • the embodiment of the present application determines the start time and length of the window according to the timing advance T TA and the delay Kmac between the network device and the reference point, so as to realize the enhancement of the start time and length of the window, thereby helping to avoid The problem of information loss caused by the starting time of the enhanced window being later than the actual starting time of the window occurs, which improves the probability of successful random access, thereby improving the efficiency of data transmission.
  • FIG. 11 is a schematic interactive flowchart of a random access method 800 according to an embodiment of the present application. As shown in FIG. 11 , the random access method 800 may include at least part of the following content:
  • the time-domain resource granularity of the delay Kmac is symbol or Tc , where Tc satisfies the following formula:
  • ⁇ f max 480 ⁇ 10 3 Hz
  • N f 4096.
  • the time domain resource granularity of the delay Kmac is the same as the time domain resource granularity of the timing advance T TA .
  • method 800 also includes:
  • the network device sends configuration information to the terminal device, where the configuration information is used to configure the value of the time delay Kmac, where the time domain resource granularity of the time delay Kmac is a symbol, or T c , or is related to the timing
  • T c time domain resource granularity of the advance amount
  • the terminal device receives the configuration information, and can determine the delay Kmac according to the configuration information.
  • the first message includes a message Msg1 for random access, and a response message to the first message includes Msg2 for random access.
  • the first message includes a message MsgA for random access, and a response message to the first message includes MsgB for random access.
  • FIG. 12 is a schematic interactive flowchart of a random access method 900 according to an embodiment of the present application. As shown in FIG. 12 , the random access method 900 may include at least part of the following content:
  • the network device sends configuration information to the terminal device, where the configuration information is used to configure the value of the time delay Kmac between the network device and the reference point, where the time-domain resource granularity of the time delay Kmac is a symbol, or T c , or the same as the time-domain resource granularity of the timing advance T TA .
  • the terminal device receives the configuration information, and can determine the delay Kmac according to the configuration information.
  • the method 900 also includes:
  • the first message includes a message Msg1 for random access
  • the response message of the first message includes Msg2 for random access.
  • the first message includes a message MsgA for random access
  • the response message of the first message includes MsgB for random access.
  • Fig. 13 shows a schematic block diagram of a terminal device 1300 according to an embodiment of the present application.
  • the terminal device 1300 includes a communication unit 1310 and a processing unit 1320 .
  • the communication unit 1310 is configured to send the first message according to the timing advance T TA ; the processing unit 1320 is configured to transmit the first message according to the timing advance T TA and the delay between the network device and the reference point Kmac, to determine the start time and length of the first window; the communication unit 1310 is further configured to receive a response message of the first message within the first window.
  • processing unit 1320 is specifically configured to:
  • the length of the second window is extended according to the time delay Kmac to obtain the length of the first window, where the length of the second window is configured by the network device through signaling, or is predefined by a protocol.
  • processing unit 1320 is specifically configured to:
  • the starting moment of the first window is determined according to the timing advance T TA and the time delay Kmac, wherein the time domain resource granularity of the time delay Kmac is smaller than a time slot.
  • the time-domain resource granularity of the delay Kmac is the same as the time-domain resource granularity of the timing advance T TA .
  • the time-domain resource granularity of the delay Kmac is Tc , where Tc satisfies the following formula:
  • ⁇ f max 480 ⁇ 10 3 Hz
  • N f 4096.
  • the time-domain resource granularity of the delay Kmac is a symbol.
  • the communication unit 1310 is further configured to receive configuration information from a network device, where the configuration information is used to configure the value of the delay Kmac, where the time-domain resource granularity of the delay Kmac is a symbol, or T c , or the same as the time-domain resource granularity of the timing advance T TA .
  • the length of the first window is less than or equal to the sum of the length of the second window and the delay Kmac, wherein the length of the second window is configured by the network device through signaling, or is predefined by the protocol .
  • the first message includes a message Msg1 for random access
  • the response message of the first message includes Msg2 for random access.
  • the first message includes a message MsgA for random access
  • the response message of the first message includes MsgB for random access.
  • terminal device 1300 may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 1300 are for realizing the method shown in FIG. 7 For the sake of brevity, the corresponding process of the terminal device in 700 will not be repeated here.
  • the communication unit 1310 is configured to send the first message according to the timing advance T TA ; the processing unit 1320 is configured to send the first message according to the timing advance T TA and the time between the network device and the reference point Delay Kmac, determine the starting moment of the first window, wherein the time domain resource granularity of the delay Kmac is smaller than a time slot; the communication unit 1310 is also configured to receive a response message of the first message within the first window .
  • the time-domain resource granularity of the delay Kmac is a symbol or T c , where T c satisfies the following formula:
  • ⁇ f max 480 ⁇ 10 3 Hz
  • N f 4096.
  • the time-domain resource granularity of the delay Kmac is the same as the time-domain resource granularity of the timing advance T TA .
  • the communication unit 1310 is further configured to receive configuration information from a network device, where the configuration information is used to configure the value of the delay Kmac, where the time-domain resource granularity of the delay Kmac is a symbol, or T c , or the same as the time-domain resource granularity of the timing advance T TA .
  • the first message includes a message Msg1 for random access
  • the response message of the first message includes Msg2 for random access.
  • the first message includes a message MsgA for random access
  • the response message of the first message includes MsgB for random access.
  • terminal device 1300 may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 1300 are to realize the method shown in FIG. 11
  • the corresponding process of the terminal device in 800 will not be repeated here.
  • Fig. 14 shows a schematic block diagram of a network device 1400 according to an embodiment of the present application.
  • the network device 1400 includes a communication unit 1410 .
  • the network device 1400 may further include a processing unit 1420 .
  • the communication unit 1410 is used to send configuration information, the configuration information is used to configure the value of the time delay Kmac between the network device and the reference point, wherein the time domain resource granularity of the time delay Kmac is a symbol, or T c , or It is the same as the time-domain resource granularity of the timing advance T TA .
  • processing unit 1420 may be configured to determine the above configuration information.
  • the communication unit 1410 is also used for:
  • the first message includes a message Msg1 for random access
  • the response message of the first message includes Msg2 for random access.
  • the first message includes a message MsgA for random access
  • the response message of the first message includes MsgB for random access.
  • the network device 1400 may correspond to the network device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the network device 1400 are for realizing the method shown in FIG. 12
  • the corresponding processes of the network devices in 900 will not be repeated here.
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input-output interface of a communication chip or a system-on-chip.
  • Fig. 15 is a schematic structural diagram of a communication device 1500 provided by an embodiment of the present application.
  • the communication device 1500 shown in FIG. 15 includes a processor 1510, and the processor 1510 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
  • the communication device 1500 may further include a memory 1520 .
  • the processor 1510 can invoke and run a computer program from the memory 1520, so as to implement the method in the embodiment of the present application.
  • the memory 1520 may be an independent device independent of the processor 1510 , or may be integrated in the processor 1510 .
  • the communication device 1500 may further include a transceiver 1530, and the processor 1510 may control the transceiver 1530 to communicate with other devices, specifically, to send information or data to other devices, or Receive messages or data from other devices.
  • the transceiver 1530 may include a transmitter and a receiver.
  • the transceiver 1530 may further include antennas, and the number of antennas may be one or more.
  • the communication device 1500 may specifically be the terminal device of the embodiment of the present application, and the communication device 1500 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application. Let me repeat.
  • the communication device 1500 may specifically be the network device of the embodiment of the present application, and the communication device 1500 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, the Let me repeat.
  • Fig. 16 is a schematic structural diagram of a device 1600 according to an embodiment of the present application.
  • the apparatus 1600 shown in FIG. 16 includes a processor 1610, and the processor 1610 can invoke and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
  • the device 1600 may further include a memory 1620 .
  • the processor 1610 can invoke and run a computer program from the memory 1620, so as to implement the method in the embodiment of the present application.
  • the memory 1620 may be an independent device independent of the processor 1610 , or may be integrated in the processor 1610 .
  • the device 1600 may further include an input interface 1630 .
  • the processor 1610 can control the input interface 1630 to communicate with other devices or chips, specifically, can obtain information or data sent by other devices or chips.
  • the device 1600 may further include an output interface 1640 .
  • the processor 1610 can control the output interface 1640 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.
  • the device can be applied to the terminal device in the embodiment of the present application, and the device can implement the corresponding process implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, details are not repeated here.
  • the device can be applied to the network device in the embodiments of the present application, and the device can implement the corresponding processes implemented by the network device in the methods of the embodiments of the present application. For the sake of brevity, details are not repeated here.
  • the device mentioned in the embodiment of the present application may also be a chip.
  • it may be a system-on-a-chip, a system-on-a-chip, a system-on-a-chip, or a system-on-a-chip.
  • FIG. 17 is a schematic block diagram of a communication system 1700 provided by an embodiment of the present application. As shown in FIG. 17 , the communication system 1700 includes a terminal device 1710 and a network device 1720 .
  • the terminal device 1710 can be used to realize the corresponding functions realized by the terminal device in the above method
  • the network device 1720 can be used to realize the corresponding functions realized by the network device in the above method.
  • the processor in the embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Program logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • the steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash.
  • the volatile memory can be Random Access Memory (RAM), which acts as external cache memory.
  • RAM Static Random Access Memory
  • SRAM Static Random Access Memory
  • DRAM Dynamic Random Access Memory
  • Synchronous Dynamic Random Access Memory Synchronous Dynamic Random Access Memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM, DDR SDRAM enhanced synchronous dynamic random access memory
  • Enhanced SDRAM, ESDRAM synchronous connection dynamic random access memory
  • Synchlink DRAM, SLDRAM Direct Memory Bus Random Access Memory
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is, the memory in the embodiments of the present application is intended to include, but not be limited to, these and any other suitable types of memory.
  • the embodiment of the present application also provides a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium can be applied to the terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, I won't repeat them here.
  • the computer-readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, I won't repeat them here.
  • the embodiment of the present application also provides a computer program product, including computer program instructions.
  • the computer program product can be applied to the terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the terminal device in the methods of the embodiments of the present application.
  • the computer program instructions cause the computer to execute the corresponding processes implemented by the terminal device in the methods of the embodiments of the present application.
  • the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For brevity, This will not be repeated here.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the terminal device in the embodiment of the present application.
  • the computer program executes the corresponding process implemented by the terminal device in each method of the embodiment of the present application, For the sake of brevity, details are not repeated here.
  • the computer program can be applied to the network device in the embodiment of the present application, and when the computer program is run on the computer, the computer executes the corresponding process implemented by the network device in each method of the embodiment of the present application, For the sake of brevity, details are not repeated here.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

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Abstract

Les modes de réalisation de la présente demande concernent un procédé d'accès aléatoire, un dispositif terminal et un dispositif de réseau. Le procédé consiste à : envoyer un premier message selon une avance temporelle TTA ; déterminer un moment de départ et la longueur d'une première fenêtre en fonction de l'avance temporelle TTA et d'un retard Kmac entre un dispositif de réseau et un point de référence ; et recevoir un message de réponse du premier message dans la première fenêtre. Au moyen de la solution technique, un moment de démarrage et/ou la longueur d'une fenêtre pour un accès aléatoire peuvent être améliorés, de telle sorte que la prévention de la situation d'un moment de démarrage de la fenêtre améliorée étant plus tardive qu'un moment de démarrage d'une fenêtre réelle est facilitée, et la prévention de perte d'informations peut ainsi être facilitée, ce qui permet d'augmenter la probabilité d'accès aléatoire réussi, et d'améliorer également l'efficacité de transmission de données.
PCT/CN2021/129097 2021-11-05 2021-11-05 Procédé d'accès aléatoire, dispositif terminal et dispositif de réseau WO2023077456A1 (fr)

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CN113271167A (zh) * 2020-02-14 2021-08-17 华为技术有限公司 一种确定定时提前的方法、通信装置
WO2021161639A1 (fr) * 2020-02-13 2021-08-19 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ Dispositif de réception, dispositif de transmission, procédé de réception, et procédé de transmission

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