WO2021030975A1 - Signaux de synchronisation nr v2x sl - Google Patents

Signaux de synchronisation nr v2x sl Download PDF

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Publication number
WO2021030975A1
WO2021030975A1 PCT/CN2019/101128 CN2019101128W WO2021030975A1 WO 2021030975 A1 WO2021030975 A1 WO 2021030975A1 CN 2019101128 W CN2019101128 W CN 2019101128W WO 2021030975 A1 WO2021030975 A1 WO 2021030975A1
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WO
WIPO (PCT)
Prior art keywords
pss
polynomial
sss
polynomials
correlation
Prior art date
Application number
PCT/CN2019/101128
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English (en)
Inventor
Tao Chen
Xuanbo SHAO
Zhixun Tang
Min LEI
Original Assignee
Mediatek Singapore Pte. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Mediatek Singapore Pte. Ltd. filed Critical Mediatek Singapore Pte. Ltd.
Priority to PCT/CN2019/101128 priority Critical patent/WO2021030975A1/fr
Publication of WO2021030975A1 publication Critical patent/WO2021030975A1/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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0016—Time-frequency-code

Definitions

  • This disclosure relates generally to wireless communications, and, more particularly, to methods and apparatus for the synchronization signals of V2X sidelink communications.
  • NR SL PSS should avoid the confusion with NR uu PSS/SSS in case of co-existence in the same frequency resources. Besides, the NR SL PSS should secure the good auto-correlation performance and good cross-correlation performance between NR SL PSS’s. Therefore, a proper design for NR SL synchronization signals are important for the operation of the NR V2X.
  • This disclosure relates generally to wireless communications, and, more particularly, to methods and apparatus for the synchronization signals of V2X sidelink communications.
  • NR PSS can be m-sequence generated from another polynomial than 145-polynomial used by NR uu PSS to avoid confusion. 131-polynomial or the other polynomial can be used to generate NR SL PSS. Additionally, only one PSS can be selected to secure the good auto-correlation performance while avoiding confusion between two PSS’s. In case of two PSS’s are selected to potentially reduce the overall detection complexity, the two PSS’s can be selected from two different polynomials for the best cross-correlation performance to avoid confusion.
  • FIG. 1 shows an exemplary block diagram of a UE (a. k. adevice) according to an embodiment of the disclosure.
  • NR SL PSS can be m-sequence generated from another polynomial than 145-polynomial which is used by NR uu PSS to avoid confusion between NR SL PSS and NR uu PSS/SSS.
  • 131-polynomial or the other polynomial can be used to generate NR SL PSS.
  • NR SL PSS can be selected from 131-polynomial as below:
  • x 1 (i+7) (x 1 (i+1) +x 1 (i) ) mod 2
  • the proper pairing between the PSS and SSS’s are needed. In this case, the component of “1-Nid (2) ” is applied in the equation above for a proper pairing between PSS and the corresponding SSS’s .
  • the two PSS’s can be selected from two different polynomials for the best cross-correlation performance to avoid confusion or miss-detection.
  • the other polynomial candidates than 145 can be one of the blow polynomials:
  • only one PSS instead of two PSS’s can be selected to secure the good auto-correlation performance while avoiding confusion caused by two NR SL PSS’s .
  • the corresponding NR SL SSS can be same as NR uu SSS as below.
  • the Nid (2) can be set as 0 or 1, they are implicitly used for generation of 672 SSS sequences.
  • the Nid (2) can be only set as 0, it is implicitly used for generation of 336 SSS sequences.
  • One PSS is corresponding to 336 SSS sequences.
  • Total 672 sequences Two PSS’s from the same or the different polynomials arecorresponding to the total 672 SSS sequences, i.e., one PSS is corresponding to 336 SSS sequences.
  • the table can be as such.
  • Nid (2) will be also used for SSS generation.
  • Table 1 and table 2 show different examples with two root indexes from same or different pplynomial.
  • Example 1 with two root indexes from the same polynomial, e.g., 131
  • Fig. 1 shows an exemplary block diagram of a UE 800 according to an embodiment of the disclosure.
  • the UE 800 can be configured to implement various embodiments of the disclosure described herein.
  • the UE 800 can include a processor 810, a memory 820, and a radio frequency (RF) module 830 that are coupled together as shown in Fig. 1.
  • RF radio frequency
  • the UE 800 can be a mobile phone, a tablet computer, a desktop computer, a vehicle carried device, and the like.
  • the processor 810 can be configured to perform various functions of the UE 800 described above with reference to embodiments described before.
  • the processor 810 can include signal processing circuitry to process received or to be transmitted data according to communication protocols specified in, for example, LTE and NR standards. Additionally, the processor 810 may execute program instructions, for example, stored in the memory 820, to perform functions related with different communication protocols.
  • the processor 810 can be implemented with suitable hardware, software, or a combination thereof.
  • the processor 810 can be implemented with application specific integrated circuits (ASIC) , field programmable gate arrays (FPGA) , and the like, that includes circuitry.
  • ASIC application specific integrated circuits
  • FPGA field programmable gate arrays
  • the circuitry can be configured to perform various functions of the processor 810.
  • the memory 820 can store program instructions that, when executed by the processor 810, cause the processor 810 to perform various functions as described herein.
  • the memory 820 can include a read only memory (ROM) , a random access memory (RAM) , a flash memory, a solid state memory, a hard disk drive, and the like.
  • the RF module 830 can be configured to receive a digital signal from the processor 810 and accordingly transmit a signal to a base station in a wireless communication network via an antenna 840.
  • the RF module 830 can be configured to receive a wireless signal from a base station and accordingly generate a digital signal which is provided to the processor 810.
  • the RF module 830 can include digital to analog/analog to digital converters (DAC/ADC) , frequency down/up converters, filters, and amplifiers for reception and transmission operations.
  • DAC/ADC digital to analog/analog to digital converters
  • the RF module 830 can include converter circuits, filter circuits, amplification circuits, and the like, for processing signals on different carriers or bandwidth parts.
  • the UE 800 can optionally include other components, such as input and output devices, additional CPU or signal processing circuitry, and the like. Accordingly, the UE 800 may be capable of performing other additional functions, such as executing application programs, and processing alternative communication protocols.
  • the processes and functions described herein can be implemented as a computer program which, when executed by one or more processors, can cause the one or more processors to perform the respective processes and functions.
  • the computer program may be stored or distributed on a suitable medium, such as an optical storage medium or a solid-state medium supplied together with, or as part of, other hardware.
  • the computer program may also be distributed in other forms, such as via the Internet or other wired or wireless telecommunication systems.
  • the computer program can be obtained and loaded into an apparatus, including obtaining the computer program through physical medium or distributed system, including, for example, from a server connected to the Internet.
  • the computer program may be accessible from a computer-readable medium providing program instructions for use by or in connection with a computer or any instruction execution system.
  • a computer readable medium may include any apparatus that stores, communicates, propagates, or transports the computer program for use by or in connection with an instruction execution system, apparatus, or device.
  • the computer-readable medium can be magnetic, optical, electronic, electromagnetic, infrared, or semiconductor system (or apparatus or device) or a propagation medium.
  • the computer-readable medium may include a computer-readable non-transitory storage medium such as a semiconductor or solid state memory, magnetic tape, a removable computer diskette, a random access memory (RAM) , a read-only memory (ROM) , a magnetic disk and an optical disk, and the like.
  • the computer-readable non-transitory storage medium can include all types of computer readable medium, including magnetic storage medium, optical storage medium, flash medium and solid state storage medium.

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

Abstract

La présente invention concerne des communications sans fil, et, plus particulièrement, des procédés et un appareil destinés aux signaux de synchronisation des communications de liaison latérale V2X. NR PSS peut être une séquence m générée à partir d'un polynôme autre que le polynôme 145 utilisé par NR uu PSS pour éviter une confusion. Le polynôme 131 ou l'autre polynôme peut être utilisé pour générer NR SL PSS. De plus, un seul PSS peut être sélectionné pour garantir la bonne performance d'auto-corrélation tout en évitant une confusion entre deux PSS. Dans le cas où les deux PSS sont choisis pour réduire potentiellement la complexité de détection globale, les deux PSS peuvent être choisis parmi deux polynômes différents pour assurer la meilleure performance de corrélation croisée afin d'éviter une confusion. En variante, si les deux PSS sont choisis parmi un polynôme, alors leur espacement devrait se situer autour (plafond ou plancher) de la moitié de la longueur de séquence, par exemple 64 = ceil (127/2), ce qui peut réduire la corrélation croisée des deux PSS.
PCT/CN2019/101128 2019-08-16 2019-08-16 Signaux de synchronisation nr v2x sl WO2021030975A1 (fr)

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PCT/CN2019/101128 WO2021030975A1 (fr) 2019-08-16 2019-08-16 Signaux de synchronisation nr v2x sl

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Application Number Priority Date Filing Date Title
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018004322A1 (fr) * 2016-07-01 2018-01-04 엘지전자(주) Procédé d'émission et de réception de données dans un système de communication sans fil et appareil associé
CN108811077A (zh) * 2017-05-05 2018-11-13 电信科学技术研究院 一种辅同步序列的生成方法、检测方法、基站及用户设备

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018004322A1 (fr) * 2016-07-01 2018-01-04 엘지전자(주) Procédé d'émission et de réception de données dans un système de communication sans fil et appareil associé
CN108811077A (zh) * 2017-05-05 2018-11-13 电信科学技术研究院 一种辅同步序列的生成方法、检测方法、基站及用户设备

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CATT: "Feature lead summary on AI 7.2.4.3 Sidelink synchronization mechanism", 3GPP TSG RAN WG1 MEETING #97; R1-1907721, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), SOPHIA-ANTIPOLIS CEDEX ; FRANCE, 16 May 2019 (2019-05-16), Reno, USA; 20190513 - 20190517, XP051740001 *
CONVIDA WIRELESS: "Design Considerations for NR SL Synchronization", 3GPP TSG-RAN WG1 MEETING #94BIS; R1-1811623, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), SOPHIA-ANTIPOLIS CEDEX ; FRANCE, 29 September 2018 (2018-09-29), Chengdu, China; 20181008 - 20181012, XP051519017 *
ITL: "Considerations on sidelink synchronization signal for NR V2X", 3GPP TSG RAN WG1 MEETING #94; R1-1809254, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), SOPHIA-ANTIPOLIS CEDEX ; FRANCE, 11 August 2018 (2018-08-11), Gothenburg, Sweden; 20180820 - 20180824, XP051516620 *

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