[go: up one dir, main page]

WO2021046617A1 - Procédé de communication sans fil et point d'accès pour une communication à faible latence ultra-fiable (urllc) - Google Patents

Procédé de communication sans fil et point d'accès pour une communication à faible latence ultra-fiable (urllc) Download PDF

Info

Publication number
WO2021046617A1
WO2021046617A1 PCT/AU2020/050977 AU2020050977W WO2021046617A1 WO 2021046617 A1 WO2021046617 A1 WO 2021046617A1 AU 2020050977 W AU2020050977 W AU 2020050977W WO 2021046617 A1 WO2021046617 A1 WO 2021046617A1
Authority
WO
WIPO (PCT)
Prior art keywords
access point
transceivers
antennas
wireless communications
antenna
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/AU2020/050977
Other languages
English (en)
Inventor
Nikola Zlatanov
Armin BAZRAFKAN
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.)
Monash University
Original Assignee
Monash University
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
Priority claimed from AU2019903377A external-priority patent/AU2019903377A0/en
Application filed by Monash University filed Critical Monash University
Publication of WO2021046617A1 publication Critical patent/WO2021046617A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
    • H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
    • H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0634—Antenna weights or vector/matrix coefficients
    • 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
    • H04L5/0023—Time-frequency-space
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • 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
    • H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing

Definitions

  • the present invention relates to mobile telecommunications technology, and in particular to a wireless communications process and an access point for Ultra-Reliable Low Latency Communication (URLLC).
  • URLLC Ultra-Reliable Low Latency Communication
  • the main applications of URLLC include intelligent transportation, tele-surgery, and industrial automation.
  • intelligent transportation vehicles need to exchange information with each other reliably and in a very short time period.
  • URLLC is the crucial technology that can enable applications such as road safety, traffic efficiency, and fully automated driving to become a reality.
  • Intelligent transportation requires the latency to be approximately 5-10 ms, and the block error rates (“BLER”) to be of the order of 10 -5 .
  • BLER block error rates
  • tele-surgery surgery is performed by a robot that is controlled by a surgeon from a remote site, and it is critical for information from the surgeon to the robot to be sent reliably and with a low latency, leading to the need for URLLC.
  • the end-to-end delay should be less than 1 ms, and the required
  • a wireless communications process executed by an access point of a wireless communications system, the process including the steps of: receiving, by a plurality of antennas of the access point, wireless signals representing pilot symbols transmitted by one or more antennas of respective transceivers of the wireless communications system; processing the received wireless signals to generate corresponding 1-bit CSI values for respective wireless communications channels between respective different antenna combinations, wherein each of the 1-bit CSI values represents channel state information of a corresponding wireless communications channel between a corresponding one of the plurality of antennas of the access point and a corresponding antenna of the one or more antennas of the one or more transceivers; processing the 1-bit CSI values for URLLC (ultra-reliable low-latency communications) between the access point and the one or more transceivers, the processing including: processing the 1 -bit CSI values and information symbols to generate corresponding transmit vectors for transmitting to the one or more transceivers in order to send the information symbols from the access point to the one or more transcei
  • URLLC ultra-reliable low-latency communications
  • the one or more transceivers are a plurality of mobile transceivers that communicate with the access point on respective different frequency bands.
  • the step of processing the received wireless signals generates a corresponding 1-bit CSI vector g for each antenna of the transceivers according to: where w / is a corresponding noise vector for the /-th pilot symbol transmission, h is a corresponding channel vector between the antennas of the access point and the antenna of the transceiver, P p is the corresponding pilot power, and L is the corresponding total number of pilot symbols transmitted by the transceiver.
  • each of the transceivers generates a corresponding transmit vector x for a corresponding information symbol s Î ⁇ -1 - j, -1 + j, 1 - j, 1 + j ⁇ according to: where Pu is the total transmit power of the transceiver, and wherein the step of processing the 1-bit CSI values includes processing a corresponding receive vector and the corresponding 1- bit CSI values to determine that a corresponding symbol s has been transmitted by the transceiver according to: where and are the real and imaginary components of , and and and and and and
  • the one or more transceivers are a plurality of transceivers that communicate with the access point on the same frequency band but using respective different and non-overlapping subsets of the plurality of antennas of the access point.
  • the one or more transceivers are a plurality of transceivers that communicate with the access point on the same frequency band.
  • the step of processing the 1-bit CSI values includes generating transmit vectors for each of the transceivers according to: where P AP is the transmit power of the access point, and
  • the plurality of antennas of the access point includes at least 100 antennas. In some embodiments, the plurality of antennas of the access point includes at least 1000 antennas.
  • an access point for a wireless communications system including a plurality of communications channels, each said communications channel including:
  • the communications channels number M and the access point further includes, for each of the antennas, a corresponding set of M 1-bit phase shifters, wherein the m- th phase shifters of the M antennas are coupled to a corresponding m-th analogue adder of a set of M analogue adders, the m-th analogue adder being coupled in turn to an m-th 1-bit ADC of a set of M ADCs.
  • the antennas of the access point number at least 100 antennas. In some embodiments, the antennas of the access point number at least 1000 antennas..
  • an electronic data storage medium having stored thereon configuration data or processor-executable instructions (or both) that, when used to configure an FPGA or when executed by at least one processor of an access point of a wireless communications system, cause the access point to execute any one of the above processes.
  • a wireless communications process executed by an access point of a wireless communications system, the process including the steps of: receiving, by a plurality of antennas of the access point, wireless signals representing pilot symbols transmitted by one or more antennas of respective transceivers of the wireless communications system; processing the received wireless signals to generate corresponding 1-bit CSI values for respective wireless communications channels between respective different antenna combinations, wherein each of the 1-bit CSI values represents channel state information of a corresponding wireless communications channel between a corresponding one of the plurality of antennas of the access point and a corresponding antenna of the one or more antennas of the transceiver; processing the 1-bit CSI values for URLLC (ultra -reliable low-latency communications) between the access point and the one or more transceivers, the processing including: generating transmit vectors for transmitting information symbols from the access point to the one or more transceivers; and processing the 1-bit CSI values to determine information symbols received from the one or more transceivers.
  • URLLC ultra -reliable low-latency communications
  • Figure 1 is a simplified block diagram of an access point in a 1-bit CSI (channel state information) generation mode, in accordance with an embodiment of the present invention
  • Figure 2 is a simplified block diagram of the access point in a transmission mode
  • FIG. 3 is a simplified block diagram of the access point in a receiver mode
  • Ligure 4 is a simplified block diagram of an access point in a transmission mode, in accordance with an alternative embodiment of the present invention
  • Ligure 5 is a simplified block diagram of the access point in a 1-bit CSI generation mode
  • Ligure 6 is a simplified block diagram of the access point in a receiver mode
  • Ligure 7 is a graph of the bit error rate (BER) of the access point communications with transceivers as a function of the signal-to-noise ratio (SNR) for different numbers of access point transmit and receive antennas and
  • BER bit error rate
  • SNR signal-to-noise ratio
  • Ligure 8 is a flow diagram of a wireless communications process executed by the access point.
  • Embodiments of the present invention include a wireless communications process and a wireless communications access point that enable Ultra-Reliable Low Latency Communication (“URLLC”) at/to transceivers by using multiple antennas at an access point in combination with 1 -bit channel state information (“CSI”) for the communications channel between each antenna of the access point and each antenna of the transceiver devices.
  • URLLC Ultra-Reliable Low Latency Communication
  • CSI channel state information
  • the use of 1-bit CSI information allows extremely fast channel estimation to be implemented at the multi-antenna access point. This allows the access point to use low- cost and fast 1-bit ADCs (analogue-to-digital converters), 1-bit DACs (digital-to-analogue converters), and 1-bit phase shifters.
  • the access point communicates with multiple transceivers using respective different frequency bands. In other embodiments, the access point communicates with multiple transceivers using the same frequency band to communicate with all transceivers.
  • an access point with a multiple number (M > 1) of antennas communicates with multiple single- antenna wireless transceivers (also variously referred to herein for convenience of description as “devices” or “users”).
  • M > 1 multiple number of antennas communicates with multiple single- antenna wireless transceivers (also variously referred to herein for convenience of description as “devices” or “users”).
  • Each of these users requires URLLC for both reception and transmission.
  • the user transmits information to the AP in one frequency band, and receives information from the AP in another frequency band, or alternatively in the same frequency band where the reception and transmission are multiplexed in time.
  • the described embodiments of the present invention implement communication methodologies that achieve URLLC for each user in both the reception and the transmission directions.
  • Sufficient conditions for achieving URLLC at the user are the following:
  • the AP has multiple antennas
  • the AP uses the 1-bit CSI vector to beamform/process its transmit vector, as well as to beamform/process its received vector for the purposes of achieving URLLC for the user in both the reception and the transmission directions.
  • Access Point Modes of operation
  • the AP operates in three modes: 1) a 1-bit CSI generation mode, used for the AP to generate a 1-bit CSI vector of a communications channel; 2) a transmitter mode, used for the AP to transmit information symbols to the user; and 3) a receiver mode, used for the AP to receive information symbols from the user.
  • a 1-bit CSI generation mode used for the AP to generate a 1-bit CSI vector of a communications channel
  • a transmitter mode used for the AP to transmit information symbols to the user
  • 3) a receiver mode used for the AP to receive information symbols from the user.
  • the user sends L pilot symbols to the AP in a time-division duplex fashion, where L > 1.
  • Such digitization of the received analogue pilot signal can be performed by passing the received analogue pilot signal to a 1 -bit ADC.
  • the generated L 1-bit CSI values for the m-th antenna of the AP are then processed in order to obtain only one 1-bit CSI value for the m-th antenna of the AP.
  • This processing can, for example, be to sum the L 1- bit CSI values and then take the sign of the sum as the 1 -bit CSI value for the m-th antenna of the AP.
  • This process can be modeled mathematically as follows.
  • the 1-bit CSI vector g of the channel vector h is given by: where w l is the noise vector at the AP for the /-th pilot transmission, P p is the user's transmit power used to transmit the pilot symbols, and L is the total number of pilot symbols transmitted by the user.
  • the 1 -bit CSI vector g given by ( 1), is known at the AP, Let denote the real- valued and imaginary-valued parts of the m-th element of g for m — 3.2. ⁇ ⁇ ⁇ , M. Using * and g, the AP constructs a vector x comprised of M elements, where the m-th element of x , denoted by for , is constructed as follows where P AP is the transmit power of the AP.
  • the symbol received at the user's antenna is y.
  • the receiving user constructs a symbol as follows:
  • .v be a complex-valued symbol that the user wants to transmit to the AP in one channel use
  • s is transformed into x, according to: where P U is the transmit power of the user. Linally, x is transmitted from the user to the AP.
  • the AP receives a complex-valued symbol on each of its antennas.
  • the AF then decides that the symbol has been transmitted by the user. Hence an error happens if occurs.
  • the most common (but not the only) wireless communications network configuration is where one AP communicates with multiple users, each of which has one or more antennas.
  • different frequency bands are allocated for communications between respective different users and the AP.
  • N users, or N antennas at the users N distinct frequency bands are allocated.
  • the communication in each frequency band is a communication between the AP and a single user antenna, and the processes described above are applied to each frequency band.
  • FIG. 1 is a simplified block diagram showing the components of an embodiment of an access point to implement the 1-bit CSI generation mode described above.
  • the AP In order for the AP to generate a 1-bit CSI, it is sufficient for the AP to have a corresponding 1-bit ADC for each of its antennas, at least when it is operating in the 1-bit CSI generation mode.
  • Figure 2 is a simplified block diagram showing the components of the access point to implement the transmission mode described above.
  • the AP operates as a transmitter of information, it is sufficient for it to have a corresponding 1 -bit DAC for each of its antennas.
  • Figure 3 is a simplified block diagram showing components of the access point to implement the receiver mode described above. When the AP operates as a receiver of information, it is sufficient for the AP to have a corresponding 1-bit analog phase-shifter for each antenna, as shown in Figure 3.
  • the AP communicates with multiple user antennas over respective different and dedicated frequency bands.
  • the access point communicates with multiple transceivers using the same frequency band to communicate with all transceivers.
  • an AP having M antennas communicates with K users over only one frequency band.
  • such communication comes at the expense of increased latency, due to 1-bit CSI generation from K users in one frequency band, and at the expense of added complexity at the AP.
  • K non-cooperating wireless transceivers referred to as users, require URLLC for both reception and transmission.
  • N K antennas in total at the users (each transceiver can have more than one antenna), indexed by 1, 2, ..., N .
  • the K users transmit information to the AP in one frequency band, and receive information from the AP in another frequency band, or in the same frequency band where the reception and transmission are multiplexed in time.
  • the following describes how the AP can achieve URLLC for the users in both the reception and transmission directions.
  • the transmit antennas at the AP are divided into N groups of M/N >1 antennas each. Each group of antennas is used as though it is a separate AP that serves only one of the users' antennas. Accordingly, the communication processes described above for the multiple frequency band embodiments are independently applied to each group of AP antennas.
  • the AP has multiple antennas
  • the AP uses a 1-bit CSI matrix to beamform/process its transmit vector, as well as to beamform/process its received vector to achieve URLLC for the users in both the reception and the transmission directions.
  • the AP has the same three operating modes as the multiple frequency band embodiments described above, namely: 1) a 1-bit CSI generation mode, used for the AP to generate a 1-bit CSI matrix of a communications channel; 2) a transmitter mode, used for the AP to transmit information symbols to the user; and 3) a receiver mode, used for the AP to receive information symbols from the user.
  • a 1-bit CSI generation mode used for the AP to generate a 1-bit CSI matrix of a communications channel
  • a transmitter mode used for the AP to transmit information symbols to the user
  • a receiver mode used for the AP to receive information symbols from the user.
  • each antenna of the users sends L pilot symbols to the AP in a time-division duplex fashion, where L 3 1.
  • the generated L 1-bit CSI values for the channel between the m-th antenna of the AP and the n- th antenna of the users are then processed in order to obtain only one 1-bit CSI value for the channel between the m-th antenna of the AP and the n- th antenna of the users.
  • This processing can, for example, be to sum the L 1-bit CSI values and then take the sign of the sum as the 1-bit CSI value for the channel between the m-th antenna of the AP and the n- th antenna of the users.
  • This process can be modeled mathematically as follows.
  • the noisy 1-bit CSI of the channel matrix H is given by: where W l is an N x M noise matrix, Pp is the pilot power, and L is the number of orthogonal pilot symbols transmitted by each of the users' antennas.
  • the corresponding user generates s n as follows:
  • the AP receives a complex-valued symbol on each of its antennas.
  • the 1-bit CSI matrix G given by (10), is knows at the AP.
  • the AP then decides that the symbol has been transmited from the n-th users' antenna, Hence, an error happens if occurs for any .
  • FIG. 5 is a simplified block diagram showing the components of an embodiment of an access point to implement the 1 -bit CSI generation mode.
  • the AP In order for the AP to generate a 1-bit CSI, it is sufficient for the AP to have a corresponding 1- bit ADC for each of its antennas, at least when it is operating in the 1-bit CSI generation mode.
  • Figure 4 is a simplified block diagram showing components of an access point to implement the transmission mode process described above.
  • Figure 6 is a simplified block diagram showing components of an access point to implement the receiver mode process described above.
  • the AP operates as a receiver of information, it is sufficient for the AP to have a corresponding set of N 1-bit analog phase-shifters for each antenna, followed by (for all antennas) N analog-adders and N 1-bit ADCs, as shown in Figure 6.
  • error correction coding can be applied to the input data before the processing steps described above in order to increase the reliability of the communication system, albeit at the expense of increasing the latency.
  • the maximum latency that the described embodiments achieve is equal to the number of channel uses required to estimate G at the AP, plus the one channel use needed for data transmission.
  • BER bit error rate
  • SNR signal-to noise-ratio
  • an access point with 1000 antennas distributed over an area of 1 m 2 was used to communicate with a transceiver as described above, achieving a data rate of 4 Mbits per second with a latency of 1 ms or less, and bit error rate (BER) of 10 -9 or less over distances of at least 1 km and up to 60 km (depending on environment).
  • Embodiments of the present invention require only simple hardware components for each antenna channel, which in turn allows a practical AP to have hundreds (if not thousands) of antennas.
  • the users’ transceivers can be simple, making the processes described herein applicable to sensor devices.
  • the communications processes described herein achieve URLLC at the physical communication layer, without any need for the higher communication layers to perform intensive processing. This leads to minimal latency.
  • the wireless communications processes described herein can be implemented in the form of configuration data of a field-programmable gate array (FPGA) or as processor-executable instructions (e.g ., firmware) of one or more processors, or as a combination of both forms, electronically stored in at least one electronic data storage medium.
  • FPGA field-programmable gate array
  • processor-executable instructions e.g ., firmware

Landscapes

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

Abstract

Processus de communication sans fil exécuté par un point d'accès recevant des signaux sans fil représentant des symboles pilotes transmis par une ou plusieurs antennes d'émetteurs/récepteurs respectifs du système de communication sans fil ; traitant les signaux sans fil reçus pour générer des valeurs CSI de 1 bit correspondantes pour des canaux de communication sans fil respectifs, chacune des valeurs CSI de 1 bit représentant des CSI d'un canal de communication sans fil correspondant entre l'une de la pluralité d'antennes du point d'accès et une antenne correspondante parmi la ou les antennes du ou des émetteurs/récepteurs ; traitant les valeurs CSI de 1 bit pour une URLLC entre le point d'accès et le ou les émetteurs/récepteurs, le traitement comprenant : le traitement des valeurs CSI de 1 bit et des symboles d'informations pour générer des vecteurs de transmission correspondants pour transmettre au ou aux émetteurs/récepteurs pour envoyer les symboles d'informations du point d'accès à un ou plusieurs émetteurs/récepteurs ; et traitant les valeurs CSI à 1 bit et les symboles reçus en provenance d'un ou de plusieurs émetteurs/récepteurs pour déterminer des symboles d'informations correspondants envoyés par un ou plusieurs émetteurs/récepteurs au point d'accès.
PCT/AU2020/050977 2019-09-11 2020-09-11 Procédé de communication sans fil et point d'accès pour une communication à faible latence ultra-fiable (urllc) Ceased WO2021046617A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2019903377 2019-09-11
AU2019903377A AU2019903377A0 (en) 2019-09-11 A wireless communications process and access point for ultra-reliable low latency communication (urllc)

Publications (1)

Publication Number Publication Date
WO2021046617A1 true WO2021046617A1 (fr) 2021-03-18

Family

ID=74867077

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2020/050977 Ceased WO2021046617A1 (fr) 2019-09-11 2020-09-11 Procédé de communication sans fil et point d'accès pour une communication à faible latence ultra-fiable (urllc)

Country Status (1)

Country Link
WO (1) WO2021046617A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018199625A1 (fr) * 2017-04-26 2018-11-01 Samsung Electronics Co., Ltd. Procédé et appareil de rapport de csi utilisant de multiples panneaux d'antenne dans des systèmes de communication sans fil avancés

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018199625A1 (fr) * 2017-04-26 2018-11-01 Samsung Electronics Co., Ltd. Procédé et appareil de rapport de csi utilisant de multiples panneaux d'antenne dans des systèmes de communication sans fil avancés

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
JACOBSSON, S. ET AL.: "Throughput Analysis of Massive MIMO Uplink With Low- Resolution ADCs", IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, vol. 16, no. 6, June 2017 (2017-06-01), XP011652584, [retrieved on 20201020], DOI: 10.1109/TWC.2017.2691318 *
LI, Y. ET AL.: "Channel Estimation and Performance Analysis of One-Bit Massive MIMO System s", IEEE TRANSACTIONS ON SIGNAL PROCESSING, vol. 65, no. 15, 1 August 2017 (2017-08-01), XP011652116, [retrieved on 20201020], DOI: 10.1109/TSP.2017.2706179 *
POPOVSKI, P. ET AL.: "Wireless Access in Ultra-Reliable Low-Latency Communication (URLLC)", ARXIV:1810.06938V1 [CS. IT, 16 October 2018 (2018-10-16), pages 1 - 18, XP080924196, Retrieved from the Internet <URL:https://arxiv.org/abs/1810.06938> [retrieved on 20201020] *
XU, J. ET AL.: "Energy Beamforming With One-Bit Feedback", IEEE TRANSACTIONS ON SIGNAL PROCESSING, vol. 62, no. 20, 15 October 2014 (2014-10-15), pages 5370 - 5381, XP011558242 *

Similar Documents

Publication Publication Date Title
EP2781035B1 (fr) Procédé et appareil pour transmettre et recevoir des signaux dans un système de communication à antennes multiples
CN1698274B (zh) 多输入多输出无线通信的装置及方法
CA2361886C (fr) Technique de retroaction pour systemes sans fil a multiples antennes d&#39;emission et de reception
US5457712A (en) Method for providing time diversity
EP2175572B1 (fr) Appareil et méthode pour transmision et réception
JPWO2019059408A1 (ja) Ｏａｍ多重通信システムおよびｏａｍ多重通信方法
EP3481022B1 (fr) Procédé de réception ou de transmission de données par ue ou station de base dans un schéma noma, ue utilisant celui-ci et station de base l&#39;utilisant
CN103259074A (zh) 有源天线、刷新幅度和相位的方法及信号处理方法
EP2215877B1 (fr) Signalisation d&#39;information d&#39;une primière à une deuxième station
US8432992B2 (en) Method for transmitting feedback information in multi input multi out put system based on codebook and a method for transmitting precoding information in multi input multi output system using codebook-bases precoding scheme
CN111937317B (zh) 发送器
JP2008172340A (ja) 無線通信用受信装置
EP2824882B1 (fr) Procédé de modulation d&#39;antenne applicable à un émetteur sans fil et émetteur l&#39;utilisant
JP6618655B2 (ja) 送信装置、無線通信システム、処理回路およびプログラム
KR20030030878A (ko) 적응형 배열 안테나 시스템의 캘리브레이션 장치 및 그 방법
US7110794B1 (en) Adaptive array apparatus and compensation method for compensating a phase difference used for generating a directivity response pattern
KR102046033B1 (ko) 대규모 안테나 시스템의 하이브리드 빔포밍 방법 및 빔포밍 장치
CN101512930B (zh) 带有可变数量波束的mimo系统中的高效cqi信令
CN114039636B (zh) 网络设备、波束成形方法及无线通信系统
WO2018059691A1 (fr) Procédé et appareil de formation de faisceau sans fil en duplex intégral doté d&#39;annulation d&#39;auto-brouillage
WO2021046617A1 (fr) Procédé de communication sans fil et point d&#39;accès pour une communication à faible latence ultra-fiable (urllc)
WO2019125609A1 (fr) Système et procédé de multiplexage par répartition de code à large bande efficace dans un domaine de sous-bande
EP3063878B1 (fr) Émetteur radio pour atténuation de distorsion
EP3465952A1 (fr) Procédé et appareil d&#39;étalonnage de réseau d&#39;antennes à l&#39;aide d&#39;un récepteur embarqué
US20250150123A1 (en) Wireless communication system, wireless communication method, and wireless communication device

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: 20862719

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: 20862719

Country of ref document: EP

Kind code of ref document: A1