WO2022037578A1 - Procédé et appareil permettant de générer une séquence de préambule d'accès aléatoire, et terminal et dispositif - Google Patents

Procédé et appareil permettant de générer une séquence de préambule d'accès aléatoire, et terminal et dispositif Download PDF

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Publication number
WO2022037578A1
WO2022037578A1 PCT/CN2021/113016 CN2021113016W WO2022037578A1 WO 2022037578 A1 WO2022037578 A1 WO 2022037578A1 CN 2021113016 W CN2021113016 W CN 2021113016W WO 2022037578 A1 WO2022037578 A1 WO 2022037578A1
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WIPO (PCT)
Prior art keywords
preamble
sequence
initial value
pseudo
random access
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PCT/CN2021/113016
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English (en)
Chinese (zh)
Inventor
王爱玲
潘成康
王启星
Original Assignee
中国移动通信有限公司研究院
中国移动通信集团有限公司
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Publication of WO2022037578A1 publication Critical patent/WO2022037578A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • the present disclosure relates to the field of communication technologies, and in particular, to a method, apparatus, terminal and device for generating a random access preamble sequence.
  • Integrating satellite and ground communications to form a three-dimensional network integrating sea, land, air, and space can achieve seamless global network coverage.
  • the high propagation delay and Doppler frequency shift caused by the high orbital position of the satellite and the fast moving speed of the non-geostationary satellite bring about the uplink synchronization of the random access process between the terminal and the base station and the design of the timer. a big challenge.
  • the terminal sends an uplink signal including a preamble sequence on the physical random access channel for the base station to perform timing advance estimation, wherein the uplink timing advance (Timing Advance, TA) when the terminal sends the preamble
  • Timing Advance TA
  • the compensation is zero, and the base station does not need to perform TA compensation when receiving and detecting the preamble sequence, and this synchronization technology without any compensation is not suitable for satellite communication systems with high propagation delay.
  • the terminal automatically obtains the TA value according to the user's location and ephemeris information, and compensates all TAs when sending the preamble sequence or compensates for the terminal-specific TA.
  • the base station compensates one when the preamble is detected.
  • the public TA based on the ground reference position; the other is that the terminal compensates a public TA based on the ground reference position, and the base station side instructs the terminal to perform terminal-specific TA adjustment in the random access response, and needs to extend the random access response (Random Access Response). , RAR) in the TA indication range.
  • RAR Random Access Response
  • beam-specific common frequency offset pre-compensation is performed on the network side.
  • beam-specific common frequency offset post-compensation is performed on the network side.
  • the elbow mode is mainly considered, and its implementation complexity is simpler than that of the on-board regeneration mode.
  • the standardization process assumes that all UEs have Global Navigation Satellite System (GNSS) positioning capabilities.
  • GNSS Global Navigation Satellite System
  • partial frequency offset pre-compensation can be performed on the network side or terminal side based on ephemeris and user location information, for a large number of low-level IoT terminals without positioning (or no time-frequency offset pre-compensation) capability, synchronous access is still a problem. A puzzle to be solved.
  • the application scenarios of satellite-ground integration will be more extensive.
  • User terminals with or without GNSS positioning capabilities need to be considered within the scope of research. Therefore, it is necessary to consider that users have no positioning capability or cannot. Guaranteed positioning accuracy is the time-frequency synchronization enhancement scheme without TA compensation or frequency offset compensation in the random access process, including the enhancement scheme design for the preamble sequence.
  • the present disclosure provides a method, apparatus, terminal and device for generating a random access preamble sequence.
  • the detection performance of the preamble sequence can be improved.
  • a method for generating a random access preamble sequence, applied to a terminal comprising:
  • the index of the preamble determine the initial value of the pseudo-random sequence used to generate the preamble
  • a preamble sequence is generated according to the initial value and the pseudo-random sequence generation method.
  • determine the initial value of the pseudo-random sequence used to generate the preamble including:
  • the initial value of the pseudo-random sequence used to generate the preamble is determined.
  • select the index of the preamble including:
  • the index of the preamble is selected according to the size of the data packet and/or the path loss during random access.
  • determine the initial value of the pseudo-random sequence used to generate the preamble including:
  • C init is the initial value of the pseudo-random sequence of the preamble, is the number of time slots in a radio frame, is the number of symbols in a slot, is the physical cell ID of the serving cell, p_id is the index of the selected preamble, the value range is 0 ⁇ p_id ⁇ P, P is the number of available preambles on each time-frequency resource information, and offset is the cyclic shift offset value.
  • the number of time slots in one radio frame, the number of symbols in one time slot, the physical cell ID of the serving cell, the number of available preambles on each time-frequency resource information, and the cyclic shift offset value It is configured through system messages or obtained according to the agreement.
  • a preamble sequence is generated according to the initial value and the m-sequence generation method.
  • x 1 (n+31) (x 1 (n+3)+x 1 (n))mod2
  • x 2 (n+31) (x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n))mod2
  • the method for generating a random access preamble sequence further includes:
  • the preamble sequence is sent.
  • Embodiments of the present disclosure further provide a method for receiving a random access preamble sequence, which is applied to a network side device, and the method includes:
  • the preamble sequence is the initial value of the pseudo-random sequence determined according to the index information of the preamble and used to generate the preamble sequence; and is generated according to the initial value and the pseudo-random sequence generation method.
  • the configuration information includes at least one of the following:
  • One or more time-frequency resource configuration information for random access transmission is
  • the number P of preamble sequences available on each time-frequency resource information is the number P of preamble sequences available on each time-frequency resource information.
  • Embodiments of the present disclosure also provide an apparatus for generating a random access preamble sequence, which is applied to a terminal, and the apparatus includes:
  • the processing module is configured to determine the initial value of the pseudo-random sequence used for generating the preamble sequence according to the index of the preamble; and generate the preamble sequence according to the initial value and the way of generating the pseudo-random sequence.
  • Embodiments of the present disclosure also provide a terminal, including:
  • the processor is configured to determine, according to the index of the preamble, an initial value of the pseudo-random sequence for generating the preamble sequence; and generate the preamble sequence according to the initial value and the way of generating the pseudo-random sequence.
  • An embodiment of the present disclosure further provides an apparatus for receiving a random access preamble sequence, which is applied to a network side device, and the apparatus includes:
  • a transceiver module configured to send random access configuration information to the terminal; receive a preamble sequence generated and sent by the terminal, where the preamble sequence is a pseudo-random sequence initial value determined according to the index information of the preamble and used to generate the preamble sequence; and The initial value and the pseudo-random sequence generation method are generated.
  • Embodiments of the present disclosure also provide a network-side device, including:
  • a transceiver configured to send random access configuration information to the terminal; receive a preamble sequence generated and sent by the terminal, where the preamble sequence is an initial value of a pseudo-random sequence for generating a preamble sequence determined according to the index information of the preamble; and The initial value and the pseudo-random sequence generation method are generated.
  • Embodiments of the present disclosure also provide a communication device, including: a processor, and a memory storing a computer program, the computer program executing the above-described method when executed by the processor.
  • Embodiments of the present disclosure also provide a computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method as described above.
  • the method for generating a random access preamble sequence includes: determining an initial value of a pseudorandom sequence for generating a preamble sequence according to an index of a preamble; generating a preamble sequence according to the initial value and a pseudorandom sequence generation method . It has good equalization and shift-add characteristics, the correlation peak does not shift with the frequency offset, the amplitude of the correlation peak can be suppressed under the frequency offset during the detection process, it has good robustness to the frequency uncertainty, and the preamble sequence can be improved.
  • the detection performance is beneficial to the completion of the system frequency offset estimation and synchronization process.
  • FIG. 1 is a schematic flowchart of a method for generating a random access preamble sequence according to an embodiment of the present disclosure
  • FIG. 2 is a schematic flowchart of a method for receiving a random access preamble sequence according to an embodiment of the present disclosure
  • FIG. 3 is a schematic block diagram of an apparatus for generating a random access preamble sequence according to an embodiment of the present disclosure.
  • an embodiment of the present disclosure provides a method for generating a random access preamble sequence, which is applied to a terminal, and the method includes:
  • Step 11 According to the index of the preamble, determine the initial value of the pseudo-random sequence used to generate the preamble sequence; the preamble in the embodiment of the present disclosure may also be referred to as a preamble or preamble sequence.
  • Step 12 Generate a preamble sequence according to the initial value and the pseudo-random sequence generation method.
  • the terminal receives the random access configuration information sent by the network side, including but not limited to: system parameter information, one or more time-frequency resources used for random access sending, each time-frequency resource information available or The number of preamble sequences included, P, etc.
  • the specific preamble sequence can be a random access preamble sequence generated based on the m sequence, and the determination of the initial value of the preamble sequence includes at least the preamble sequence index, that is, the preamble index, so that the random access preamble sequence can have good balance and shift phase.
  • the correlation peak does not shift with the frequency offset, and the amplitude of the correlation peak can be suppressed under the frequency offset during the detection process, which has good robustness to frequency uncertainty, and can improve the detection performance of the preamble sequence, which is conducive to the completion of the system frequency offset. Estimation and synchronization process.
  • step 11 may include:
  • Step 111 select the index of the preamble
  • the index of the preamble may be selected according to criteria such as the size of the data packet and/or the path loss during random access.
  • Step 112 Determine the initial value of the pseudo-random sequence used to generate the preamble according to the index of the selected preamble.
  • C init is the initial value of the pseudo-random sequence of the preamble, is the number of time slots in a radio frame, is the number of symbols in a slot, is the physical cell ID of the serving cell, p_id is the index of the selected preamble, the value range is 0 ⁇ p_id ⁇ P, P is the number of available preambles on each time-frequency resource information, and offset is the cyclic shift offset value.
  • the number of time slots in one radio frame, the number of symbols in one time slot, the physical cell ID of the serving cell, the number of available preambles on each time-frequency resource information, the cyclic shift Parameters such as the bit offset value are configured through system messages or obtained according to protocol conventions.
  • step 12 may include:
  • Step 121 Generate a preamble sequence according to the initial value and the m-sequence generation method.
  • x 1 (n+31) (x 1 (n+3)+x 1 (n))mod2
  • x 2 (n+31) (x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n))mod2
  • the method for generating a random access preamble sequence may further include:
  • Step 13 Send the preamble sequence.
  • the random access preamble sequence is generated based on the m sequence, and the determination of the initial value of the preamble sequence includes at least the preamble sequence index, that is, the preamble index.
  • the terminal receives the random access configuration information sent by the network side. , including but not limited to: system parameter information, one or more time-frequency resource opportunities for random access transmission, the number P of preambles available or included in each time-frequency resource information, etc.
  • the terminal determines the parameter information of the pre-defined initial value of the preamble sequence according to the protocol, or the terminal receives the parameter information of the initial value of the preamble sequence sent by the base station through broadcast information or system message.
  • the terminal selects the preamble sequence sent on the PRACH (Physical Random Access Channel) according to the data packet size and pathloss during access, and calculates the initial value of the preamble sequence according to the selected preamble sequence index and related parameter information, that is, generates the preamble.
  • the initial value of the sequence is determined by the leading sequence index.
  • the terminal uses the initial value of the preamble sequence and the m-sequence generation formula to generate the corresponding preamble sequence.
  • the network side generates P preamble sequences available on each time-frequency resource information according to the preamble sequence index, the preamble sequence related parameter information and the cyclic shift, and groups them.
  • the selection of its cyclic shift can reuse the cyclic shift generation method of NR.
  • the random access process is enhanced and designed, that is, the pseudo-m sequence is used to generate the preamble sequence, which has good equalization and shift-add characteristics, and the correlation
  • the peak value does not shift with the frequency offset, and the correlation peak amplitude can be suppressed under the frequency offset during the detection process, which has good robustness to frequency uncertainty, can improve the detection performance of the preamble sequence, and is conducive to the completion of the system frequency offset estimation and synchronization process.
  • an embodiment of the present disclosure further provides a method for receiving a random access preamble sequence, which is applied to a network side device, and the method includes:
  • Step 21 sending random access configuration information to the terminal
  • Step 22 receiving the preamble sequence generated and sent by the terminal, the preamble sequence is the initial value of the pseudo-random sequence determined according to the index information of the preamble and used to generate the preamble sequence; and generated according to the initial value and the generation method of the pseudo-random sequence of.
  • the configuration information includes at least one of the following:
  • One or more time-frequency resource configuration information for random access transmission is
  • the number P of preamble sequences available on each time-frequency resource information is the number P of preamble sequences available on each time-frequency resource information.
  • this method is a method corresponding to the above method on the terminal side, and all the implementation manners in the above method embodiments are applicable to the embodiments of this method, and the same technical effect can also be achieved.
  • an embodiment of the present disclosure further provides an apparatus 30 for generating a random access preamble sequence, which is applied to a terminal, and the apparatus 30 includes:
  • the processing module 31 is configured to determine an initial value of a pseudo-random sequence for generating a preamble sequence according to the index of the preamble; and generate a preamble sequence according to the initial value and the way of generating the pseudo-random sequence.
  • determine the initial value of the pseudo-random sequence used to generate the preamble including:
  • the initial value of the pseudo-random sequence used to generate the preamble is determined.
  • select the index of the preamble including:
  • the index of the preamble is selected according to criteria such as data packet size and/or path loss during random access.
  • determine the initial value of the pseudo-random sequence used to generate the preamble including:
  • C init is the initial value of the pseudo-random sequence of the preamble, is the number of time slots in a radio frame, is the number of symbols in a slot, is the physical cell ID of the serving cell, p_id is the index of the selected preamble, the value range is 0 ⁇ p_id ⁇ P, P is the number of available preambles on each time-frequency resource information, offset is the cyclic shift offset value.
  • the number of time slots in one radio frame, the number of symbols in one time slot, the physical cell ID of the serving cell, the number of available preambles on each time-frequency resource information, and the cyclic shift offset value and other parameters are configured through system messages or obtained according to the agreement.
  • a preamble sequence is generated according to the initial value and the m-sequence generation method.
  • x 1 (n+31) (x 1 (n+3)+x 1 (n))mod2
  • x 2 (n+31) (x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n))mod2
  • the device for generating a random access preamble sequence further includes:
  • the transceiver module 32 is configured to send the preamble sequence.
  • the device is a device corresponding to the above method on the terminal side, and all the implementation manners in the above method embodiments are applicable to the embodiments of the device, and the same technical effects can also be achieved.
  • Embodiments of the present disclosure also provide a terminal, including:
  • the processor is configured to determine, according to the index of the preamble, an initial value of the pseudo-random sequence for generating the preamble sequence; and generate the preamble sequence according to the initial value and the way of generating the pseudo-random sequence.
  • determine the initial value of the pseudo-random sequence used to generate the preamble including:
  • the initial value of the pseudo-random sequence used to generate the preamble is determined.
  • select the index of the preamble including:
  • the index of the preamble is selected according to criteria such as data packet size and/or path loss during random access.
  • determine the initial value of the pseudo-random sequence used to generate the preamble including:
  • C init is the initial value of the pseudo-random sequence of the preamble, is the number of time slots in a radio frame, is the number of symbols in a slot, is the physical cell ID of the serving cell, p_id is the index of the selected preamble, the value range is 0 ⁇ p_id ⁇ P, P is the number of available preambles on each time-frequency resource information, and offset is the cyclic shift offset value.
  • the number of time slots in one radio frame, the number of symbols in one time slot, the physical cell ID of the serving cell, the number of available preambles on each time-frequency resource information, and the cyclic shift offset value and other parameters are configured through system messages or obtained according to the agreement.
  • a preamble sequence is generated according to the initial value and the m-sequence generation method.
  • x 1 (n+31) (x 1 (n+3)+x 1 (n))mod2
  • x 2 (n+31) (x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n))mod2
  • the terminal further includes: a transceiver, configured to send the preamble sequence.
  • the terminal is a terminal corresponding to the above method, and all the implementation manners in the above method embodiments are applicable to the embodiments of the terminal, and the same technical effect can also be achieved.
  • An embodiment of the present disclosure further provides an apparatus for receiving a random access preamble sequence, which is applied to a network side device, and the apparatus includes:
  • a transceiver module configured to send random access configuration information to the terminal; receive a preamble sequence generated and sent by the terminal, where the preamble sequence is a pseudo-random sequence initial value determined according to the index information of the preamble and used to generate the preamble sequence; and The initial value and the pseudo-random sequence generation method are generated.
  • the configuration information includes at least one of the following:
  • One or more time-frequency resource configuration information for random access transmission is
  • the number P of preamble sequences available on each time-frequency resource information is the number P of preamble sequences available on each time-frequency resource information.
  • the apparatus is an apparatus corresponding to the method on the network device side, and all the implementation manners in the above method embodiments are applicable to the embodiments of the apparatus, and the same technical effects can also be achieved.
  • Embodiments of the present disclosure also provide a network-side device, including:
  • a transceiver configured to send random access configuration information to the terminal; receive a preamble sequence generated and sent by the terminal, where the preamble sequence is a pseudo-random sequence initial value for generating a preamble sequence determined according to the index information of the preamble; and The initial value and the pseudo-random sequence generation method are generated.
  • the configuration information includes at least one of the following:
  • One or more time-frequency resource configuration information for random access transmission is
  • the number P of preamble sequences available on each time-frequency resource information is the number P of preamble sequences available on each time-frequency resource information.
  • the network side device is a device corresponding to the above method on the network device side, and all implementations in the above method embodiments are applicable to the embodiments of the device, and the same technical effects can also be achieved.
  • Embodiments of the present disclosure also provide a communication device, including: a processor, and a memory storing a computer program, the computer program executing the above-described method when executed by the processor. All the implementation manners in the foregoing method embodiments are applicable to the embodiments of the device, and the same technical effects can also be achieved.
  • Embodiments of the present disclosure also provide a computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method as described above. All the implementation manners in the foregoing method embodiments are applicable to the embodiments of the device, and the same technical effects can also be achieved.
  • the disclosed apparatus and method may be implemented in other manners.
  • the apparatus 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 may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the computer software products are stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present disclosure.
  • the aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk and other mediums that can store program codes.
  • modules, units, sub-modules, sub-units, etc. can be implemented in one or more Application Specific Integrated Circuits (ASIC), Digital Signal Processing (DSP), digital signal processing equipment ( DSP Device, DSPD), Programmable Logic Device (Programmable Logic Device, PLD), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), general-purpose processor, controller, microcontroller, microprocessor, for in other electronic units or combinations thereof that perform the functions described herein.
  • ASIC Application Specific Integrated Circuits
  • DSP Digital Signal Processing
  • DSP Device digital signal processing equipment
  • PLD Programmable Logic Device
  • Field-Programmable Gate Array Field-Programmable Gate Array
  • FPGA Field-Programmable Gate Array
  • each component or each step can be decomposed and/or recombined. These disaggregations and/or recombinations should be considered equivalents of the present disclosure.
  • the steps for performing the above-mentioned series of processes can naturally be performed in chronological order according to the illustrated order, but need not necessarily be performed in chronological order, and some steps can be performed in parallel or independently of each other.
  • Those of ordinary skill in the art can understand that all or any steps or components of the method and device of the present disclosure can be implemented in any computing device (including a processor, storage medium, etc.) or a network of computing devices in hardware, firmware, etc. , software, or a combination thereof, which can be implemented by those of ordinary skill in the art using their basic programming skills after reading the description of the present disclosure.
  • the objects of the present disclosure can also be achieved by running a program or set of programs on any computing device.
  • the computing device may be a known general purpose device. Therefore, the objects of the present disclosure can also be achieved merely by providing a program product containing program code for implementing the method or apparatus. That is, such a program product also constitutes the present disclosure, and a storage medium in which such a program product is stored also constitutes the present disclosure.
  • the storage medium can be any known storage medium or any storage medium developed in the future.
  • each component or each step can be decomposed and/or recombined. These disaggregations and/or recombinations should be considered equivalents of the present disclosure.
  • the steps of executing the above-described series of processes can naturally be executed in chronological order in the order described, but need not necessarily be executed in chronological order. Certain steps may be performed in parallel or independently of each other.

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Abstract

L'invention concerne un procédé et un appareil permettant de générer une séquence de préambule d'accès aléatoire, et un terminal et un dispositif. Le procédé de génération de séquence de préambule d'accès aléatoire consiste à : déterminer, en fonction d'un indice d'un préambule, une valeur initiale de séquence pseudo-aléatoire pour générer une séquence de préambule (11) ; et générer la séquence de préambule en fonction de la valeur initiale et d'un procédé de génération (12) de séquence pseudo-aléatoire.
PCT/CN2021/113016 2020-08-18 2021-08-17 Procédé et appareil permettant de générer une séquence de préambule d'accès aléatoire, et terminal et dispositif WO2022037578A1 (fr)

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CN202010830768.7A CN114079552B (zh) 2020-08-18 2020-08-18 一种随机接入前导序列的生成方法、装置、终端及设备
CN202010830768.7 2020-08-18

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