WO2022067713A1 - Procédé d'accès aléatoire, système de communication, dispositif de communication, et support de stockage lisible - Google Patents

Procédé d'accès aléatoire, système de communication, dispositif de communication, et support de stockage lisible Download PDF

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Publication number
WO2022067713A1
WO2022067713A1 PCT/CN2020/119522 CN2020119522W WO2022067713A1 WO 2022067713 A1 WO2022067713 A1 WO 2022067713A1 CN 2020119522 W CN2020119522 W CN 2020119522W WO 2022067713 A1 WO2022067713 A1 WO 2022067713A1
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Prior art keywords
random access
terminal
message
access method
network device
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PCT/CN2020/119522
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English (en)
Chinese (zh)
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張博裕
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深圳市万普拉斯科技有限公司
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Priority to CN202080106634.9A priority Critical patent/CN116368929A/zh
Priority to PCT/CN2020/119522 priority patent/WO2022067713A1/fr
Publication of WO2022067713A1 publication Critical patent/WO2022067713A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]

Definitions

  • the present invention relates to the field of communications, in particular to the field of random access (Random Access, RA) technologies, and in particular, to a random access method, a communications system, a communications device, and a readable storage medium.
  • Random Access Random Access
  • the 5th generation mobile network (or 5th generation wireless systems, 5G) is a new generation of cellular mobile communication technology, its main goals are high data rate, reduce delay, improve system capacity and large-scale device connection.
  • the 5G system supports two types of competitive random access: 4-step Random Access Channel (4-step RACH) and 2-step Random Access Channel (2-step RACH).
  • 4-step RACH belongs to the random access method of the Long Term Evolution (LTE) system.
  • the random access process is shown in Figure 1, which is mainly divided into four steps:
  • the user terminal sends Msg1 to the network device: the user terminal (User Equipment, UE) selects preamble (preamble) and PRACH (Physical Random Access Channel, physical random access channel) resources, and uses the PRACH resource to send the preamble to the network device.
  • the user terminal User Equipment, UE
  • PRACH Physical Random Access Channel, physical random access channel
  • the network device sends Msg2 to the user terminal: the network device receives the preamble, calculates TA (Time Alignment, timing advance), and sends RAR (Random Access Response, random access response) to the user terminal, where the RAR contains TA information and messages for Msg3
  • the UL grant uplink scheduling grant
  • the temporary C-RNTI Cell Radio Network Temporary Identity, cell wireless network temporary identity
  • the PDCCH (Physical Downlink Control Channel, physical downlink control channel) carrying Msg2 is scrambled with RA-RNTI (Random Access RNTI), and the RA-RNTI uniquely corresponds to the time-frequency resource for sending Msg1 within a 10ms window; Msg2 also carries a preamble ID , the user terminal determines that the Msg2 corresponds to the Msg1 through the RA-RNTI and the preamble ID.
  • RA-RNTI Random Access RNTI
  • the user terminal sends Msg3 to the network device: the user terminal sends uplink transmission on the UL grant specified by the aforementioned Msg2.
  • the data transmitted by the Msg3 uplink is different.
  • the Msg3 uplink transmits an RRC (Radio Resource Control, Radio Resource Control) connection establishment request.
  • RRC Radio Resource Control, Radio Resource Control
  • the network device sends Msg4 to the user terminal: the Msg4 can be understood as a contention resolution (Contention Resolution, CR) message.
  • the user terminal can judge whether the random access is successful this time according to the Msg4.
  • the temporary C-RNTI is automatically converted into the C-RNTI, which is the unique identifier of the user terminal in the cell, that is, the permanent C-RNTI.
  • the 5G system supports 2-step RACH in addition to the 4-step RACH of the LTE system.
  • the process flow of the 2-step RACH is shown in Figure 2.
  • the user terminal sends Msg A to the network device: the Msg A may include a preamble and data.
  • the network device sends Msg B to the user terminal: the Msg B may include RAR and CR.
  • the wireless cellular network based on the 5G system can provide wireless communication services for user terminals by deploying network equipment, such as base stations, thereby enabling network equipment and user terminals to perform data transmission.
  • network equipment such as base stations
  • the current 5G system generally obtains uplink synchronization through 4-step RACH or 2-step RACH.
  • the prior art does not specify how to handle uplink synchronization when 2-step RACH falls back to 4-step RACH.
  • the present invention provides a random access method, comprising:
  • the terminal sends the first message to the network device
  • the terminal receives the second message replied by the network device
  • the terminal determines whether the second message carries both a random access response and a contention resolution message
  • the terminal adopts a two-step random access to perform a random access procedure
  • the terminal adopts a four-step random access to perform a random access procedure.
  • the present invention provides another random access method, including:
  • the network device receives the first message sent by the terminal
  • the network device replies to the terminal with a second message, which is used by the terminal to determine whether the second message carries both a random access response and a contention resolution message;
  • the network device adopts a two-step random access to perform a random access procedure
  • the network device adopts a four-step random access to perform a random access procedure.
  • the present invention provides a communication system, including a terminal and a network device, where the terminal is used to perform the steps of the above-mentioned random access method, and the network device is used to perform the steps of the above-mentioned another random access method.
  • the present invention provides a communication device comprising a memory and a processor, the memory stores a program, and the program is configured to be executed by the processor to perform one or more steps of any of the above random access methods.
  • the present invention provides a computer-readable storage medium storing a program for being executed by a processor to perform one or more steps of any of the above random access methods.
  • the invention regulates the processing mode of uplink synchronization when the 2-step RACH falls back to the 4-step RACH, which is beneficial to improve the communication efficiency.
  • Fig. 1 is the schematic flow chart of 4-step RACH
  • Fig. 2 is the schematic flow chart of 2-step RACH
  • FIG. 3 is a schematic structural diagram of a wireless communication system according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a random access method according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a random access method according to another embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a communication device according to an embodiment of the present invention.
  • the wireless communication system is, for example: the fifth generation (5th Generation, 5G) system or the new radio (New Radio, NR), the global system for mobile communications (Global System for mobile communications, GSM) system, long term evolution (long term evolution, LTE) ) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access ( wideband code division multiple access (WCDMA) system, general packet radio service (GPRS) system, universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) ) system, etc.
  • the wireless communication system is not limited to this.
  • a wireless communication system will be referred to herein below as a communication system or system for the convenience of the description.
  • the wireless communication system includes a network device 31 and a terminal 32 for accessing a wireless network 33, such as a radio access network (Radio Access Network, RAN) or a core network (Core Network, CN).
  • a wireless network 33 such as a radio access network (Radio Access Network, RAN) or a core network (Core Network, CN).
  • the network device 31 can be any kind of electronic device with wireless transceiver function.
  • the network device 31 includes but is not limited to: a base station (base station, BS), an evolved Node B (evolved Node B, eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), Base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (such as home evolved Node B or home Node B, HNB), baseband unit (baseband unit, BBU); wireless fidelity Access point (AP), wireless relay node, wireless backhaul node, transmission point (TP), or transmission and reception point (TRP) in the (wireless fidelity, WIFI) system etc.; it can also be TRP or TP in the 5G system, one or a group of antenna panels of the base station in the 5G system; or it can be a network node that constitutes a TRP or TP, such as a BBU or a
  • the terminal 32 may also be referred to as user equipment or user terminal, mobile station (Mobile Station, MS), mobile terminal (Mobile Terminal, MT), etc., and is a device that provides audio, video and/or data connectivity to users, for example,
  • the terminal 32 may be a handheld device, a vehicle-mounted device, or the like with a wireless connection function.
  • some specific examples of the terminal 32 may be: a smart phone (Mobile Phone), a pocket computer (Pocket Personal Computer, PPC), a handheld computer, a personal digital assistant (Personal Digital Assistant, PDA), a notebook computer, a tablet computer, a wearable computer equipment, or in-vehicle equipment.
  • uplink data transmission The process in which the terminal 32 sends data to the network device 31 is called uplink data transmission, and the process in which the network device 31 sends data to the terminal 32 is called downlink data transmission.
  • uplink synchronization needs to be established between the terminal 32 and the network device 31 .
  • the terminal 32 establishes uplink synchronization with the network device 31 through a random access procedure (Random Access Procedure).
  • the terminal 32 when the terminal 32 has new uplink data to transmit, and has lost or has not established uplink synchronization with the network device 31, it generally needs to first obtain the uplink synchronization through the competition-based 4-step RACH process shown in FIG. 1, and then Then perform uplink data transmission.
  • the industry proposes to use the 2-step RACH process shown in Figure 2 to obtain uplink synchronization. For different random access modes, how the terminal 32 chooses, for example, how to determine that it should fall back from 2-step RACH to 4-step RACH at certain moments, there is no corresponding solution in the prior art.
  • the present invention provides a random access method, which regulates the processing method of uplink synchronization when 2-step RACH falls back to 4-step RACH, so as to improve communication efficiency.
  • FIG. 4 is a schematic flowchart of a random access method according to an embodiment of the present invention.
  • the random access method in this embodiment may include the following steps S11 to S15.
  • S11 The terminal sends a first message to the network device.
  • the first message may be the Msg A message corresponding to the 2-step RACH, which at least simultaneously carries a random access preamble and a data part, wherein the data part includes but is not limited to one or a combination of the following contents: terminal identification, Buffer Status Report (BSR) and real business data.
  • BSR Buffer Status Report
  • the terminal attempts to obtain uplink synchronization with the network device in a 2-step RACH manner at the current moment.
  • the first message is Msg A as an example below.
  • the preamble and the data part may be frequency division multiplexing (Frequency Division Multiplexing, FDM), or may be time division multiplexing (Time Division Multiplexing, TDM).
  • FDM Frequency Division Multiplexing
  • TDM Time Division Multiplexing
  • the first message may also be the Msg 1 message corresponding to the 4-step RACH, which at least carries a preamble but does not carry a data part, and the data part is referred to above.
  • the terminal attempts to obtain uplink synchronization with the network device using the 4-step RACH method.
  • the second message is determined by the network device according to the reception condition of the first message by the network side (or the network device).
  • the reception of the first message can be divided into: both the preamble and the data part in the first message are successfully received; the preamble in the first message is not successfully received, but the data part is successfully received; Neither the preamble nor the data portion was successfully received.
  • the second message is determined by the network device according to the reception of the first message, and the terminal determines whether the 2-step RACH fails according to the reply of the network device (that is, the second message). specifically:
  • the second message replied by the network device can be regarded as the Msg B message corresponding to the 2-step RACH, It carries at least both RAR and CR messages.
  • the network device determines that the 2-step RACH fails. At this time, the terminal will continue to try the 2-step RACH and execute it when the 2-step RACH succeeds.
  • the corresponding uplink synchronization mode or, until the maximum number of preamble transmissions configured by the network device for the terminal is reached, and then fall back to 4-step RACH; or directly fall back to 4-step RACH.
  • the terminal will continue to try the 2-step RACH, and execute the corresponding 2-step RACH when the 2-step RACH succeeds.
  • the processing method of uplink synchronization or, until the maximum number of preamble transmissions configured by the network device for the terminal is reached, it will not fall back to 4-step RACH; or, the network device instructs the terminal to directly fall back to 4-step RACH.
  • the second message replied by the network device can be regarded as the Msg 2 message corresponding to the 4-step RACH, and the Msg 2 message carries at least RAR, It does not carry a CR message.
  • S13 The terminal determines whether the second message carries both the random access response and the contention resolution message.
  • the terminal judges whether the 2-step RACH fails according to the reply of the network device. In the case of failure and success, the information content carried by the second message is different. For details, refer to the above.
  • the RAR contains at least the TA information and the UL grant for the data part, as well as the temporary C-RNTI allocated by the network device, and the CR message is used to indicate that a terminal with a certain ID is in wireless access (Random Access, RA) wins the competition.
  • the second message carries both RAR and CR messages, which means that the network device allows the terminal to use 2-step RACH.
  • the second message replied by the network device can be regarded as the Msg B of the 2-step RACH, which carries at least the RAR and CR messages at the same time, the terminal determines that the current 2-step RACH has not failed, and the terminal continues to use the 2-step RACH and The network device acquires uplink synchronization.
  • the terminal using 2-step RACH to perform random access procedure includes: the terminal sends Msg A carrying the preamble and data part to the network device, and the network device replies to the terminal Msg B carrying at least both RAR and CR messages.
  • the second message replied by the network device can be regarded as the Msg 2 message of the 4-step RACH, which does not carry the CR message, or carries the CR message but the CR message indicates that the contention conflict resolution failed, indicating that the current 2-step If the RACH fails, the terminal should fall back from the 2-step RACH to the 4-step RACH, and obtain uplink synchronization with the network device according to the RAR message.
  • the terminal adopts the 4-step RACH to perform the random access procedure, including: the terminal sends the Msg 1 carrying at least the preamble to the network device, the network device replies the Msg 2 that carries at least the RAR, and then the terminal sends to the network device Msg 3 that carries at least the data part, The network device replies with Msg 4 carrying at least the CR message.
  • the terminal may continue to try the 2-step RACH, and execute the corresponding uplink synchronization method when the 2-step RACH succeeds, or until the maximum preamble configured by the network device for the terminal is reached The number of transmissions will fall back to 4-step RACH; or the terminal will fall back to 4-step RACH directly.
  • the network device in the Msg B message corresponding to the 2-step RACH, the network device must send the RAR and CR messages to the terminal at the same time point or integrated in the same subframe, otherwise the terminal will fall back to 4-step step RACH achieves uplink synchronization with network equipment. That is to say, the embodiment of the present invention regulates the uplink synchronization processing mode that should be adopted when the 2-step RACH falls back to the 4-step RACH, so as to facilitate flexible switching of the random access that the terminal access network device should adopt. way to improve communication efficiency.
  • the CR message will carry the identification of the winning terminal in the wireless access competition. If the identifications match, the terminal determines that the wireless access competition has been won, otherwise the competition has failed. On the other hand, if the second message replied by the network device does not carry a CR message, it means that the random access mode currently adopted by the terminal fails. At this time, even if the second message carries RAR, the terminal cannot use the current The random access method obtains uplink synchronization with network equipment. Based on this, in the aforementioned step S13, within the receiving window of the second message, the terminal may first determine whether the CR message is decoded, and then determine whether the second message carries the RAR.
  • the terminal Since once the terminal decodes the CR message replied by the network device (carried in the second message) and judges that the random access is successful, it means that the network device allows the terminal to use the current random access mode. In the case where the network device has already obtained the uplink synchronization, the terminal can stop searching and decoding the RAR without decoding the RAR carried in the second message this time.
  • the terminal rolls back from the 2-step RACH to the 4-step RACH, and when the 4-step RACH is subsequently adopted, the embodiment of the present invention may consider that it is still possible with the communication process. Switch back to 2-step RACH to shorten the access delay.
  • the signal used for communication between the terminal and the network device is delayed in space. For example, the terminal moves away from the network device during a call, and the signal sent from the network device will arrive at the terminal "later and later". , at the same time, the terminal's signal will also arrive at the network device "more and later", and the delay will cause the network device to receive the terminal's signal in this time slot and the network device to receive the next signal from other terminals.
  • the slots overlap each other, causing intersymbol interference.
  • the network device carries TA in the RAR and sends it to the terminal during the random access process, and the terminal uses the TA to realize the time alignment of uplink transmission, so as to eliminate the different transmission delays between the terminals.
  • the TA is carried in the RAR and sent to the terminal. Therefore, when the 2-step RACH is rolled back to the 4-step RACH, the TA timer is still kept running, which can ensure that the time alignment of the uplink transmission is realized in the 4-step RACH to eliminate the transmission delay.
  • FIG. 5 is a schematic flowchart of a random access method according to another embodiment of the present invention.
  • the random access method in this embodiment may include the following steps S21-S27.
  • S21 The terminal sends the first message to the network device.
  • S23 The terminal determines whether the second message carries both RAR and CR messages.
  • step S24 is performed.
  • step S27 is performed.
  • S24 The terminal determines whether the TA timer is running.
  • step S25 is executed. If the TA timer is not running, step S27 is executed.
  • S25 The terminal determines whether the TA timer has timed out.
  • step S27 is executed. If the TA timer has not timed out, step S26 is executed.
  • S26 The terminal adopts two-step random access.
  • the terminal determines the random access mode to be adopted by parsing the message carried in the second message. In short, the terminal needs to make the determination.
  • the process can determine the random access method that should be used.
  • the foregoing judgment process may also be performed by the network device, and then the terminal adopts a corresponding uplink synchronization manner according to the judgment result.
  • the second message may further include indication information, where the indication information is used to indicate the random access mode of the terminal.
  • the terminal After receiving the second message, the terminal obtains the indication information by decoding, so as to directly determine the random access mode allowed by the network device.
  • the terminal may also detect whether the random access mode specified by the indication information is the same as the random access mode obtained according to the foregoing judgment. If they are the same, the random access mode is implemented; if they are different, the random access mode obtained by one of them may be implemented.
  • the network device issues the most accurate instruction information, so the terminal may preferably try to establish uplink synchronization with the network device using the random access mode specified by the instruction information.
  • the indication information may be carried in physical layer control information or a medium access control (medium access control, MAC) control unit.
  • the physical layer control information or the MAC layer can be understood as non-higher layer signaling.
  • Non-higher layer signaling is relative to higher layer signaling.
  • the high-level signaling may refer to signaling sent by the high-level protocol layer, and the high-level protocol layer is at least one protocol layer above the MAC layer.
  • the high-layer signaling may refer to broadcast messages or terminal-specific radio resource control (radio resource control, RRC), etc.
  • RRC radio resource control
  • this embodiment carries the indication information in the non-high-layer signaling.
  • the network device indicates the random access mode of the terminal through non-higher layer signaling (eg, DCI or MAC control unit).
  • non-higher layer signaling may be a MAC control unit or physical layer control information, such as downlink control information (DCI) or side-link control information (SCI).
  • DCI downlink control information
  • SCI side-link control information
  • the indication information is carried in physical layer control information or one or more reserved bits in the MAC control element.
  • the network device may add a field on the basis of the PDCCH instruction, and use the added field to indicate the random access mode of the terminal.
  • the lengths of the DCI after adding the field and the DCI before the adding may be the same or different.
  • the network device indicates the random access mode of the terminal through one or more reserved bits in the DCI.
  • FIG. 6 is a schematic structural diagram of a communication device according to an embodiment of the present invention.
  • the communication apparatus 60 can be used as both a terminal and a network device.
  • the communication device 60 includes a processor 61 and a memory 62, and the processor 61 and the memory 62 can be connected through a communication bus 63 for data or signal transmission.
  • the processor 61 is the control center of the communication device 60, uses various interfaces and lines to connect various parts of the entire communication device 60, executes communication by running or loading programs stored in the memory 62, and calling the data stored in the memory 62. Various functions of the device 60 and processing data to monitor the communication device 60 as a whole.
  • the communication device 60 loads the instructions corresponding to the processes of one or more programs into the memory 62 according to the aforementioned steps, and the processor 61 executes the programs stored in the memory 62, thereby realizing any one of the aforementioned The random access method of the embodiment.
  • the specific content of the steps executed by the processor 61 to invoke the program may refer to the foregoing embodiments, which will not be repeated here.
  • the execution bodies of the above steps may not be the processor 61 and the memory 62, but are implemented by other modules and units respectively.
  • the embodiments of the present invention provide a readable storage medium, in which a plurality of instructions are stored, and the instructions can be loaded by a processor to execute any one of the random access methods provided by the embodiments of the present invention. or multiple steps.
  • the readable storage medium may include a read only memory (ROM, Read Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and the like.
  • ROM read only memory
  • RAM random access memory
  • magnetic disk or an optical disk and the like.
  • any random access method provided by the embodiments of the present invention can be implemented
  • any random access method provided by the embodiments of the present invention can be implemented
  • first and second are only for convenience of description, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more technical features. “Plurality” means two or more, unless expressly specifically limited otherwise.
  • steps in the flow charts of the above embodiments are displayed in sequence according to the arrows, they are not necessarily executed in sequence according to the sequence of the arrows. Unless explicitly stated herein, the steps are performed in no strict order and may be performed in other orders. Moreover, at least a part of the steps in the figure may include multiple sub-steps or multiple stages, and may not necessarily be executed and completed at the same time, but may be executed at different times, and the execution sequence is not necessarily sequential, but may be performed with other steps or At least a portion of the sub-steps or phases of the other steps are performed in turn or alternately.

Abstract

L'invention concerne un procédé d'accès aléatoire, un système de communication, un dispositif de communication, et un support de stockage lisible. Le procédé d'accès aléatoire comprend les étapes suivantes : par un terminal, envoyer un premier message à un dispositif de réseau et recevoir un second message renvoyé par le dispositif de réseau; déterminer si le second message transporte simultanément des messages RAR et CR; si tel est le cas, utiliser un RACH à 2 étapes; et sinon, utiliser un RACH à 4 étapes. La présente invention normalise un mode de traitement de synchronisation de liaison montante lorsqu'un RACH à 2 étapes est ramené à un RACH à 4 étapes, facilite la commutation flexible de modes d'accès aléatoire d'un terminal, et améliore l'efficacité de communication.
PCT/CN2020/119522 2020-09-30 2020-09-30 Procédé d'accès aléatoire, système de communication, dispositif de communication, et support de stockage lisible WO2022067713A1 (fr)

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CN202080106634.9A CN116368929A (zh) 2020-09-30 2020-09-30 随机接入方法及通信系统、通信装置、可读存储介质
PCT/CN2020/119522 WO2022067713A1 (fr) 2020-09-30 2020-09-30 Procédé d'accès aléatoire, système de communication, dispositif de communication, et support de stockage lisible

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180184439A1 (en) * 2015-06-22 2018-06-28 Samsung Electronics Co., Ltd. Communication method on basis of semi-persistent schedulling in wireless communication system
CN108282901A (zh) * 2017-01-06 2018-07-13 电信科学技术研究院 一种随机接入响应方法和装置
CN111405675A (zh) * 2019-01-02 2020-07-10 中国移动通信有限公司研究院 随机接入方法、终端及网络设备

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180184439A1 (en) * 2015-06-22 2018-06-28 Samsung Electronics Co., Ltd. Communication method on basis of semi-persistent schedulling in wireless communication system
CN108282901A (zh) * 2017-01-06 2018-07-13 电信科学技术研究院 一种随机接入响应方法和装置
CN111405675A (zh) * 2019-01-02 2020-07-10 中国移动通信有限公司研究院 随机接入方法、终端及网络设备

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
NOKIA, ALCATEL-LUCENT SHANGHAI BELL: "Considerations on NR RACH procedures", 3GPP DRAFT; R2-168013 CONSIDERATIONS ON NR RACH PROCEDURES, vol. RAN WG2, 4 November 2016 (2016-11-04), Reno, USA, pages 1 - 5, XP051192332 *
VIVO: "RAN2 impacts of 2-step RACH", 3GPP DRAFT; R2-1818260 RAN2 IMPACTS OF 2-STEP RACH, vol. RAN WG2, 2 November 2018 (2018-11-02), Spokane, USA, pages 1 - 5, XP051482133 *

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