[go: up one dir, main page]

WO2014081421A1 - Appareil et procédé de conception de séquence robuste pour permettre une détection de signal entre différentes technologies - Google Patents

Appareil et procédé de conception de séquence robuste pour permettre une détection de signal entre différentes technologies Download PDF

Info

Publication number
WO2014081421A1
WO2014081421A1 PCT/US2012/066165 US2012066165W WO2014081421A1 WO 2014081421 A1 WO2014081421 A1 WO 2014081421A1 US 2012066165 W US2012066165 W US 2012066165W WO 2014081421 A1 WO2014081421 A1 WO 2014081421A1
Authority
WO
WIPO (PCT)
Prior art keywords
radio access
sequence
difference
access technology
technology
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/US2012/066165
Other languages
English (en)
Inventor
Amitav Mukherjee
Sayantan Choudhury
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Inc
Original Assignee
Nokia Inc
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.)
Filing date
Publication date
Application filed by Nokia Inc filed Critical Nokia Inc
Priority to PCT/US2012/066165 priority Critical patent/WO2014081421A1/fr
Publication of WO2014081421A1 publication Critical patent/WO2014081421A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0012—Modulated-carrier systems arrangements for identifying the type of modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2666—Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks

Definitions

  • the present application relates generally to an apparatus and a method for robust sequence design to enable cross technology signal detection.
  • LTE Long term evolution
  • UMTS universal mobile telecommunications system
  • 3GPP 3 rd generation partnership project
  • Other non-limiting example wireless communication protocols include global system for mobile, GSM, high speed packet access, HSPA, and wireless local area network WLAN, worldwide interoperability for microwave access, WiMAX.
  • a method comprising determining, at a first radio access technology, at lease one difference between the characteristics of the first radio access technology and the characteristics of a second radio access technology; processing a data sequence of the first radio access technology by taking into account the at least one difference; and generating a second data sequence based on the processing for transmission to an apparatus of the second radio access technology.
  • an apparatus comprising at least one processor, and at least one memory including computer program code, wherein the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to determine, at a first radio access technology, at lease one difference between the characteristics of the first radio access technology and the characteristics of a second radio access technology; process a data sequence of the first radio access technology by taking into account the at least one difference; and generate a second data sequence based on the processing for transmission to an apparatus of the second radio access technology.
  • a computer program product comprising a computer-readable medium bearing computer program code embodied therein for use with a computer
  • the computer program code may include code for determining, at a first radio access technology, at lease one difference between the characteristics of the first radio access technology and the characteristics of a second radio access technology; processing a data sequence of the first radio access technology by taking into account the at least one difference; and generating a second data sequence based on the processing for transmission to an apparatus of the second radio access technology.
  • an apparatus comprising means for determining, at a first radio access technology, at lease one difference between the characteristics of the first radio access technology and the characteristics of a second radio access technology; means for processing a data sequence of the first radio access technology by taking into account the at least one difference; and means for generating a second data sequence based on the processing for transmission to an apparatus of the second radio access technology.
  • Figure 1 displays a framework of long term evolution LTE downlink physical channels, including the proposed physical heterogeneous coexistence channel according to an example embodiment
  • Figure 2 illustrates ideal Zadoff-Chu sequence autocorrelation without impairments
  • Figure 3 illustrates Zadoff-Chu sequence autocorrelation with cross-technology impairments
  • Figure 4 illustrates a robust sequence generation scheme at a LTE transmitter according to an example embodiment
  • Figure 5 compares the probability of detection of interfering LTE signal for target of false-alarm rate 0.01 between the proposed method and the conventional method according to an example embodiment
  • Figure 6 illustrates a flow diagram of operating a LTE transmitter according to an example embodiment.
  • Figure 7 illustrates a simplified block diagram of various example apparatuses that are suitable for use in practicing various example embodiments of this application.
  • an underlying lower-power node of a second technology such as for example, wireless local area network WLAN, operating on the same channel typically suffers from interference.
  • Signal detection may be the first step for initiation of interference avoidance measures.
  • different systems with different radio access technologies normally have dinstinct and incompatible characteristics, such as for example, sampling rate, orthogonal frequency-division multiplexing OFDM subcarrier spacing, synchronization sequence, frame structure, and so on, naively re -using existing synchronization sequences of one technology will suffer from poor signal detection performance due to the effect of the difference of characteristics.
  • a new physical channel of a first radio access technology such as for example LTE, dedicated to transmission of a coexistence frame in order to aid interference avoidance by a second technology, such as for example WLAN, is proposed.
  • a robust sequence design and preprocessing techniques allows the devices of the second radio access technology to accurately detect the presence of co- channel signals of the first radio access technology in spite of the difference of characteristics of these two technologies.
  • LTE and WLAN will be used as the non-limiting examples of the first and the second radio access technology, respectively. But they are non-limiting and presented for example only.
  • a new downlink physical channel for LTE denoted as physical heterogeneous coexistence channel PHCCH
  • a coexistence frame is designed to carry specially designed sequences that allow WLAN receiver to detect the presence of LTE transmitter.
  • the design of the coexistence sequences accounts for the cross-technology incompatibility by intelligent pre-processing of sequence transmitted by LTE that are designed to improve the probability of signal detection at WLAN devices. In an example embodiment this is done without the need for modifying the conventional detection algorithm in place at WLAN nodes, while in other embodiments more sophisticated signal detection schemes can be utilized.
  • LTE eNB/user equipment UEs and WLAN devices share the same frequency band.
  • WLAN operates under distributed coordination function DCF protocol, based on carrier sense multiple access/collision avoidance CSMA/CA mechanism.
  • a new downlink physical channel PHCCH for LTE is defined to be used for the transmission of the coexistence frame.
  • Figure 1 displays a framework of LTE downlink physical channels 101, including the proposed PHCCH 103 according to an example embodiment.
  • the duration of each coexistence frame on the PHCCH may be the same as the time-span of the primary synchronization signal PSS and a secondary synchronization signal SSS.
  • the PHCCH is proposed to transmit a single-carrier signal instead of a conventional multi-carrier signal.
  • LTE and WLAN have incompatible OFDM parameters, e.g., subcarrier spacings.
  • the single-carrier signal may be generated by reusing the uplink single carrier frequence division multiple access SC-FDMA architecture, or by bypassing inverse fast Fourier transform IFFT/fast Fourer transform FFT processing blocks in the OFDM subsystem.
  • multi-carrier signals may be used for the PHCCH. Monitoring a predefined channel instead of searching over the entire spectrum for possible interferers significantly improves the energy efficiency of the WLAN receiver and simultaneously reduces complexity.
  • the proposed PHCCH periodically transmits coexistence frame that is designed for accurate reception at WLAN receiver.
  • the proposed channel may be orthogonal to the existing LTE channels and may or may not be simultaneously transmitted with the other channels.
  • PHCCH may be transmitted on certain symbols only and in those symbols, there can be no data transmission on those subcarriers.
  • the traffic carried on the PHCCH may comprise a lengfh-N robust sequence x that is designed to be detected with high probability at WLAN receivers that use conventional auto-correlation algorithms, as described next.
  • the eNB broadcasts a PSS and a SSS that enables a UE to determine the cell ID and radio frame timing.
  • the PSS is generated using a Zadoff-Chu ZC sequence that has ideal auto-correlation (delta function) and cross-correlation properties when received at a terminal of the same technology, i.e., when there are no sampling and frequency offsets, as shown in Figure 2.
  • the ideal auto-correlation of a ZC sequence has a peak 201 at lag of 0 and is 0 elsewhere.
  • Figure 3 describes the ZC sequence autocorrelation with cross-technology impairments.
  • the peak 301 at lag of 0 there are other smaller peaks, e.g., 302 at lag of -80.
  • WLAN nodes generally use auto-correlation-based methods, e.g., energy detection, for signal detection, this phenomenon will degrade the signal detection accuracy and therefore impair interference avoidance capabilities.
  • the autocorrelation-based detection process at the WLAN station STA works optimally when the received sequence has an autocorrelation with a single peak.
  • the effect of the cross-technology mismatch between LTE and WLAN leads to multiple peaks with 'sidelobes' of large amplitude in the received signal autocorrelation, which causes the degradation in detection performance.
  • WLAN assumes that the operating environment is interference-free once it has captured the medium after the CSMA/CA process, and therefore does not have intrinsic interference avoidance capabilities at the physical layer.
  • the preamble section of every WLAN frame contains a short training field STF or legacy STF sequence for packet detection and coarse
  • the overall STF is of 8 ⁇ duration, consisting of 10 repetitions of a sequence that spans ⁇ . ⁇ .
  • the sequence is sent by using a single carrier by LTE over a flat-fading channel.
  • LTE and WLAN at the physical layer leads to sampling time offset AT and carrier frequency offset Af , which are captured in the phase offset parameter ⁇ as explained further below.
  • x ⁇ t is the transmitted sequence sample at time t
  • h (t ) is the complex channel coefficient
  • n (t ) is additive complex Gaussian noise
  • ⁇ is modeled as
  • Such a sequence y (k) carries the cross-technology impairments so it may not be proper for detection purpose.
  • sampling time and carrier frequency offsets are generated due to the cross- technology incompatibility of LTE and WLAN, they can be assumed as deterministic parameters that can be obtained or estimated by LTE.
  • a sequence generation method is proposed to take an arbitrary root sequence r generated at the LTE sample rate, and apply pre-filtering and frequency offset pre-compensation to generate the robust sequence that exihibits the autocorrelation property as shown in Figure 2.
  • Figure 4 illustrates a robust sequence generation scheme at a LTE transmitter according to an example embodiment.
  • a transmit sequence 402 generated at the LTE samping rate such as for example, an arbitrary root sequence r
  • a pre-filtering block 403 is pre-filtered by a pre-filtering block 403 and pre-compensated for the frequency offset by a frequency offset pre-compensation block 405.
  • the pre- filtering block 403 may be implemented as a zero-padding operation followed by a low-pass interpolation filter with finite impulse response, e.g., a linear-phase filter with a Kaiser window.
  • the pre-compensation block may be implemented by multiplying by ⁇ ⁇ 1 ⁇ e-jcp to remove the phase offset. Therefore, a robust transmit sequence 404 in the time domain is obtained as
  • the root sequence ⁇ can be a ZC sequence, a STF sequence, or taken from a new family of sequences such as Barker or Oppermann sequences that possess constant amplitude zero autocorrelation properties.
  • the detection scheme at WLAN receiver may be based on
  • FIG. 5 shows the detection probability for the proposed method compared with conventional method, which is denoted as "Naive", according to an example embodiment.
  • the target false-alarm rate is set to 0.01.
  • Figure 5 shows that the proposed method 501 outperforms the naive case 502.
  • the merits of the proposed invention also hold if conventional cross-correlation detection methods are used by WLAN.
  • LTE uses the STF as the transmit sequence. Then, instead of following the STF with the long training field as would be expected in a WLAN packet preamble, LTE can simply repeat the STF for another 8 ⁇ , which alerts WLAN receiver that the sequence is non-WLAN, instead, it is for coexistence detection purpose.
  • Figure 6 illustrates a flow diagram of operating a LTE transmitter according to an example embodiment.
  • a transmitter of a first radio access technology such as for example, a LTE eNB transmitter, determines at lease one difference between the characteristics of the first radio access technology and the characteristics of a second radio access technology, such as for example, WLAN.
  • the LTE eNB transmitter processes a data sequence, such as for example an arbitrary root sequence r illustrated above. In an example embodiment, the process may comprise the pre-filtering and/or frequency offset precompensation of Figure 4.
  • a second data sequence such as for example, the sequence x described above, is generated based on the processing for transmission to an apparatus of the second radio access technology.
  • a network element NEl 701 of a first radio access technology such as for example a LTE eNB
  • a second radio access technology such as for example a WLAN device.
  • the NEl 701 includes a processor 705, a memory, MEM, 704 coupled to the processor 705, and a suitable transceiver, TRANS, 703 (having a transmitter, TX, and a receiver, RX) coupled to the processor 705.
  • the MEM 704 stores a program, PROG, 702.
  • the TRANS 703 is suitable for bidirectional wireless communications with the NE2 711.
  • the NEl 701 is capable of being operably coupled to one or more external networks or systems, and/or communicating with one or more user equipment of the first radio access technology such as LTE terminals, which are not shown in this figure.
  • the NE2 711 includes a processor 715, a memory, MEM, 714 coupled to the processor 715, and a suitable transceiver, TRANS, 713 (having a transmitter, TX, and a receiver, RX) coupled to the processor 715.
  • the MEM 714 stores a program, PROG, 712.
  • the TRANS 713 is capable of bidirectional wireless communications with the NEl 701.
  • the NE2 711 is capable of communicating with one or more devices of the second radio access technology such as WLAN devices, which are not shown in this figure
  • the NE1 701 may further include a robust sequence generation unit 706.
  • the unit 706, together with the processor 705 and the PROG 702, may be utilized by the NE1 701 in conjunction with various example embodiments of the application, as described herein.
  • the NE2 711 may further include a sequence detection unit 716 for detecting the sequence transmitted from NE1 701 and distinguishing it from the conventional sequence sent from other device of the second radio access technology.
  • At least one of the PROGs 702 and 712 is assumed to include program instructions that, when executed by the associated processor, enable the electronic apparatus to operate in accordance with example embodiments of this disclosure, as discussed herein.
  • the MEMs 704 and 714 may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as
  • the memory may be non-transitory in nature.
  • the processors 705 and 715 may be of any type suitable to the local technical environment, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors, DSPs, and processors based on single- or multi-core processor architecture, as non-limiting examples.
  • a technical effect of one or more of the example embodiments disclosed herein may be generating a robust sequence that allows WLAN to correctly detect the presence of interfering LTE signals at the physical layer, without the need for explicit cross-technology control channels between LTE and WLAN or feedback from WLAN. This helps to reduce implementation complexity of WLAN devices and makes the invention a viable coexistence solution.
  • LTE and WLAN are used throughout this document as examples, it is to be understood that the inventive principles described herein are not limited to a LTE- WLAN coexistence environment but are applicable to any suitable coexistence scenarios.
  • Embodiments of the present invention may be implemented in software, hardware, application logic or a combination of software, hardware and application logic.
  • the software, application logic and/or hardware may reside on an apparatus such as a user equipment, a NodeB or other mobile communication devices. If desired, part of the software, application logic and/or hardware may reside on a macro eNodeB base station 701, part of the software, application logic and/or hardware may reside on a WLAN device 711, and part of the software, application logic and/or hardware may reside on other chipset or integrated circuit.
  • the application logic, software or an instruction set is maintained on any one of various conventional computer-readable media.
  • a "computer-readable medium” may be any media or means that can contain, store, communicate, propagate or transport the instructions for use by or in connection with an instruction execution system, apparatus, or device.
  • a computer-readable medium may comprise a computer-readable storage medium that may be any media or means that can contain or store the instructions for use by or in connection with an instruction execution system, apparatus, or device.

Landscapes

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

Abstract

Selon un mode de réalisation illustratif de la présente invention, un procédé peut comprendre les étapes consistant à déterminer, dans une première technologie d'accès radio, au moins une différence entre les caractéristiques de la première technologie d'accès radio et les caractéristiques d'une seconde technologie d'accès radio; traiter une séquence de données de la première technologie d'accès radio en tenant compte d'au moins une différence; et produire une seconde séquence de données sur la base du traitement à des fins de transmission à un appareil de la seconde technologie d'accès radio.
PCT/US2012/066165 2012-11-20 2012-11-20 Appareil et procédé de conception de séquence robuste pour permettre une détection de signal entre différentes technologies Ceased WO2014081421A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2012/066165 WO2014081421A1 (fr) 2012-11-20 2012-11-20 Appareil et procédé de conception de séquence robuste pour permettre une détection de signal entre différentes technologies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2012/066165 WO2014081421A1 (fr) 2012-11-20 2012-11-20 Appareil et procédé de conception de séquence robuste pour permettre une détection de signal entre différentes technologies

Publications (1)

Publication Number Publication Date
WO2014081421A1 true WO2014081421A1 (fr) 2014-05-30

Family

ID=50776443

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/066165 Ceased WO2014081421A1 (fr) 2012-11-20 2012-11-20 Appareil et procédé de conception de séquence robuste pour permettre une détection de signal entre différentes technologies

Country Status (1)

Country Link
WO (1) WO2014081421A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016160528A1 (fr) * 2015-04-02 2016-10-06 Qualcomm Incorporated Forme d'onde de préambule améliorée pour une coexistence
WO2016198925A1 (fr) * 2015-06-12 2016-12-15 Telefonaktiebolaget Lm Ericsson (Publ) Systèmes et procédés pour détecter des nœuds ou des signaux d'une technologie d'accès radio (rat) par un nœud d'une autre rat
WO2017172101A1 (fr) * 2016-03-31 2017-10-05 Apple Inc. Détection sans fil de co-canal
WO2018015796A1 (fr) * 2016-07-22 2018-01-25 Telefonaktiebolaget Lm Ericsson (Publ) Fonctionnement de balise à protocole multi-ofdm
WO2018031116A1 (fr) * 2016-08-11 2018-02-15 Qualcomm Incorporated Détection de technologies pour une coexistence
EP3200518A4 (fr) * 2014-09-25 2018-08-08 Sony Corporation Dispositif
WO2019099159A1 (fr) * 2017-11-17 2019-05-23 Qualcomm Incorporated Détection de support assistée par un champ d'apprentissage à travers de multiples technologies d'accès radio

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7184460B2 (en) * 2002-06-26 2007-02-27 George L. Yang Spread spectrum communication system with automatic rate detection
US20090082017A1 (en) * 2007-09-21 2009-03-26 Chang Henry S Detecting the presence of multiple communication access technologies

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7184460B2 (en) * 2002-06-26 2007-02-27 George L. Yang Spread spectrum communication system with automatic rate detection
US20090082017A1 (en) * 2007-09-21 2009-03-26 Chang Henry S Detecting the presence of multiple communication access technologies

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3735055A1 (fr) * 2014-09-25 2020-11-04 Sony Corporation Dispositif et procédé
EP3200518A4 (fr) * 2014-09-25 2018-08-08 Sony Corporation Dispositif
US10306626B2 (en) 2014-09-25 2019-05-28 Sony Corporation Device
CN107771385B (zh) * 2015-04-02 2021-01-05 高通股份有限公司 用于共存的增强型前置码波形
US20160295420A1 (en) * 2015-04-02 2016-10-06 Qualcomm Incorporated Enhanced preamble waveform for coexistence
US10917795B2 (en) 2015-04-02 2021-02-09 Qualcomm Incorporated Enhanced preamble waveform for coexistence
WO2016160528A1 (fr) * 2015-04-02 2016-10-06 Qualcomm Incorporated Forme d'onde de préambule améliorée pour une coexistence
CN107771385A (zh) * 2015-04-02 2018-03-06 高通股份有限公司 用于共存的增强型前置码波形
JP2018515000A (ja) * 2015-04-02 2018-06-07 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ 共存のための拡張プリアンブル波形
US11528616B2 (en) 2015-04-02 2022-12-13 Qualcomm Incorporated Enhanced preamble waveform for coexistence
WO2016198925A1 (fr) * 2015-06-12 2016-12-15 Telefonaktiebolaget Lm Ericsson (Publ) Systèmes et procédés pour détecter des nœuds ou des signaux d'une technologie d'accès radio (rat) par un nœud d'une autre rat
US10278214B2 (en) 2015-06-12 2019-04-30 Telefonaktiebolaget L M Ericsson (Publ) Systems and methods for detecting nodes or signals of a radio access technology (RAT) by a node of another RAT
US10523261B2 (en) 2016-03-31 2019-12-31 Apple Inc. Co-channel wireless detection
WO2017172101A1 (fr) * 2016-03-31 2017-10-05 Apple Inc. Détection sans fil de co-canal
WO2018015796A1 (fr) * 2016-07-22 2018-01-25 Telefonaktiebolaget Lm Ericsson (Publ) Fonctionnement de balise à protocole multi-ofdm
US10862723B2 (en) 2016-07-22 2020-12-08 Telefonaktiebolaget Lm Ericsson (Publ) Multi-OFDM-protocol beacon operation
WO2018031116A1 (fr) * 2016-08-11 2018-02-15 Qualcomm Incorporated Détection de technologies pour une coexistence
US10708751B2 (en) 2016-08-11 2020-07-07 Qualcomm Incorporated Detection of technologies for coexistence
US10965514B2 (en) 2017-11-17 2021-03-30 Qualcomm Incorporated Training field assisted medium sensing across multiple radio access technologies
WO2019099159A1 (fr) * 2017-11-17 2019-05-23 Qualcomm Incorporated Détection de support assistée par un champ d'apprentissage à travers de multiples technologies d'accès radio

Similar Documents

Publication Publication Date Title
Chakrapani On the design details of SS/PBCH, signal generation and PRACH in 5G-NR
CA3013918C (fr) Recherche de cellules de communication sans fil a bande etroite
KR101802340B1 (ko) 랜덤 액세스 채널 구성들의 동적 선택
CN104335661B (zh) 用于认知lte系统中的带外感应的方法、设备和计算机可读存储介质
US11477807B2 (en) Enhanced signal detection for wireless communications
CN103200694B (zh) 一种通信系统中的随机接入方法及装置
CN107409028B (zh) 发射设备、接收设备及其方法
CN103782632B (zh) 无线通信系统中的小区搜索方法
WO2014081421A1 (fr) Appareil et procédé de conception de séquence robuste pour permettre une détection de signal entre différentes technologies
EP2439973A1 (fr) Procédé et appareil de détection basés sur un processus d accès aléatoire
US9185571B2 (en) Employing reference signals in communications
EP3334111A1 (fr) Procédé, appareil et système de traitement d'informations
CN107113757B (zh) Sc-fdma中的没有前导码的上行链路同步
CN107211458A (zh) 用于随机接入前导码检测的方法和设备
WO2016131475A1 (fr) Efficacité de communication
EP3308567B1 (fr) Systèmes et procédés pour détecter des noeuds ou des signaux d'une technologie d'accès radio (rat) par un noeud d'une autre rat
US9942772B2 (en) Node and method for dynamic synchronization of communications for a wireless device
RU2721157C1 (ru) Широкополосное обнаружение сигнала синхронизации в системе nr
US20250323745A1 (en) Cell dormancy in standalone single carrier frequency domain equalization (sc-fde)-based systems
US20250324421A1 (en) Methods, architectures, apparatuses and systems for common downlink control channel in single carrier with frequency domain equalization
WO2025217485A1 (fr) Procédés, architectures, appareils et systèmes d'accès initial à des systèmes d'égalisation de domaine de fréquence porteuse unique (sc-fde)
WO2019137600A1 (fr) Nœud d'accès au réseau, dispositif client et procédés d'accès initial dans une nouvelle radio

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12888740

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12888740

Country of ref document: EP

Kind code of ref document: A1