WO2020143032A1 - Common signal structure for multiple numerologies - Google Patents

Common signal structure for multiple numerologies Download PDF

Info

Publication number
WO2020143032A1
WO2020143032A1 PCT/CN2019/071381 CN2019071381W WO2020143032A1 WO 2020143032 A1 WO2020143032 A1 WO 2020143032A1 CN 2019071381 W CN2019071381 W CN 2019071381W WO 2020143032 A1 WO2020143032 A1 WO 2020143032A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
data sequence
subcarrier spacing
resource elements
signal structure
Prior art date
Application number
PCT/CN2019/071381
Other languages
English (en)
French (fr)
Inventor
Zhe LUO
Tao Tao
Jianguo Liu
Yan Meng
Gang Shen
Original Assignee
Nokia Shanghai Bell Co., Ltd.
Nokia Solutions And Networks Oy
Nokia Technologies Oy
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 Shanghai Bell Co., Ltd., Nokia Solutions And Networks Oy, Nokia Technologies Oy filed Critical Nokia Shanghai Bell Co., Ltd.
Priority to PCT/CN2019/071381 priority Critical patent/WO2020143032A1/en
Priority to CN201980088537.9A priority patent/CN113302867B/zh
Publication of WO2020143032A1 publication Critical patent/WO2020143032A1/en

Links

Images

Classifications

    • 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
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2634—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
    • H04L27/26362—Subcarrier weighting equivalent to time domain filtering, e.g. weighting per subcarrier multiplication
    • 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
    • H04L27/26025—Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking
    • 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
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • 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
    • H04L5/0091—Signaling for the administration of the divided path

Definitions

  • Embodiments of the present disclosure generally relate to wireless communication, and in particular, to a common signal structure for multiple numerologies.
  • a preamble similar to 802.11a/802.11ax with potential enhancements will be studied as a candidate solution for transmission burst detection in NR on Unlicensed Spectrum (NR-U) .
  • NR-U Unlicensed Spectrum
  • a preamble may be sent by a transmitter before a transmission burst, and a receiver may detect the preamble and get some information of this transmission burst, for example, a length of the transmission burst.
  • example embodiments of the present disclosure provide a solution related to a common signal structure for multiple numerologies.
  • a method for communication comprises obtaining a data sequence and a signal structure defining signal duration and a number of repeated parts.
  • the method also comprises determining, based on subcarrier spacing in use and the signal structure, a pattern for mapping the data sequence to a plurality of resource elements.
  • the method further comprises transmitting a signal carrying the data sequence based on the determined pattern, such that the transmitted signal has the signal structure.
  • a method for communication comprises receiving a signal carrying a data sequence.
  • the method also comprises obtaining a signal structure defining signal duration and a number of repeated parts.
  • the method also comprises determining, based on subcarrier spacing in use and the signal structure, a pattern for mapping the data sequence to a plurality of resource elements.
  • the method further comprises obtaining the data sequence from the signal based on the determined pattern.
  • a device comprising at least one processor and at least one memory storing computer program code.
  • the at least one memory and the computer program code are configured to, with the at least one processor, cause the device to obtain a data sequence and a signal structure defining signal duration and a number of repeated parts.
  • the at least one memory and the computer program code are also configured to, with the at least one processor, cause the device to determine, based on subcarrier spacing in use and the signal structure, a pattern for mapping the data sequence to a plurality of resource elements.
  • the at least one memory and the computer program code are further configured to, with the at least one processor, cause the device to transmit a signal carrying the data sequence based on the determined pattern, such that the transmitted signal has the signal structure.
  • a device comprising at least one processor and at least one memory storing computer program code.
  • the at least one memory and the computer program code are configured to, with the at least one processor, cause the device to receive a signal carrying a data sequence.
  • the at least one memory and the computer program code are also configured to, with the at least one processor, cause the device to obtain a signal structure defining signal duration and a number of repeated parts.
  • the at least one memory and the computer program code are also configured to, with the at least one processor, cause the device to determine, based on subcarrier spacing in use and the signal structure, a pattern for mapping the data sequence to a plurality of resource elements.
  • the at least one memory and the computer program code are further configured to, with the at least one processor, cause the device to obtain the data sequence from the signal based on the determined pattern.
  • an apparatus for communication comprises means for obtaining a data sequence and a signal structure defining signal duration and a number of repeated parts.
  • the apparatus also comprises means for determining, based on subcarrier spacing in use and the signal structure, a pattern for mapping the data sequence to a plurality of resource elements.
  • the apparatus further comprises means for transmitting a signal carrying the data sequence based on the determined pattern, such that the transmitted signal has the signal structure.
  • an apparatus for communication comprising means for receiving a signal carrying a data sequence.
  • the apparatus also comprises means for obtaining a signal structure defining signal duration and a number of repeated parts.
  • the apparatus also comprises means for determining, based on subcarrier spacing in use and the signal structure, a pattern for mapping the data sequence to a plurality of resource elements.
  • the apparatus further comprises means for obtaining the data sequence from the signal based on the determined pattern.
  • a non-transitory computer readable medium comprises program instructions for causing an apparatus to perform the method according to the first aspect.
  • the computer readable medium comprises program instructions for causing an apparatus to perform the method according to the second aspect.
  • Fig. 1 is a schematic diagram of a communication environment in which embodiments of the present disclosure can be implemented
  • Fig. 2 shows a flowchart of an example method in accordance with some embodiments of the present disclosure
  • Fig. 3 shows different patterns associated with different subcarrier spacing values for mapping a data sequence to resource elements such that a transmitted signal carrying the data sequence is the same in time domain for the different subcarrier spacing values in accordance with some embodiments of the present disclosure
  • Fig. 4 shows various transmitted or received signals carrying a data sequence associated with different subcarrier spacing values in case that a cyclic prefix is inserted in accordance with some embodiments of the present disclosure
  • Fig. 5 shows that two transmitted signals carrying a data sequence associated with different subcarrier spacing values are the same after linear phase rotation values are applied to the data sequence, in case that a cyclic prefix is inserted in accordance with some embodiments of the present disclosure
  • Fig. 6 shows a flowchart of another example method in accordance with some embodiments of the present disclosure
  • Fig. 7 shows a simulation result of performance of data sequence transmission without a cyclic prefix in accordance with some embodiments of the present disclosure
  • Fig. 8 shows a simulation result of performance of data sequence transmission with a cyclic prefix in accordance with some embodiments of the present disclosure
  • Fig. 9 shows a simulation result of performance of data sequence transmission with a cyclic prefix and a phase rotation in accordance with some embodiments of the present disclosure.
  • Fig. 10 is a simplified block diagram of a device that is suitable for implementing embodiments of the present disclosure.
  • references in the present disclosure to “one embodiment, ” “an embodiment, ” “an example embodiment, ” and the like indicate that the embodiment described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
  • first and second and so on may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments.
  • the term “and/or” includes any and all combinations of one or more of the listed terms.
  • circuitry used herein may refer to one or more or all of the following: (a) hardware-only circuit implementations (such as implementations in only analog and/or digital circuitry) and (b) combinations of hardware circuits and software, such as (as applicable) : (i) a combination of analog and/or digital hardware circuit (s) with software/firmware and (ii) any portions of hardware processor (s) with software (including digital signal processor (s) ) , software, and memory (ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and (c) hardware circuit (s) and or processor (s) , such as a microprocessor (s) or a portion of a microprocessor (s) , that requires software (for example, firmware) for operation, but the software may not be present when it is not needed for operation. ”
  • circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and/or firmware.
  • circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
  • the term “communication network” refers to a network following any suitable communication standards, such as New Radio (NR) , Long Term Evolution (LTE) , LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , Narrow Band Internet of Things (NB-IoT) and so on.
  • NR New Radio
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High-Speed Packet Access
  • NB-IoT Narrow Band Internet of Things
  • the communication network may also refer to a so called Unlicensed Band Network, Licensed Band Network or MuLTEfire Network, or the like.
  • the communications between a terminal device and a network device in the communication network may be performed according to any suitable generation communication protocols, including, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the future fifth generation (5G) communication protocols, and/or any other protocols either currently known or to be developed in the future.
  • suitable generation communication protocols including, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the future fifth generation (5G) communication protocols, and/or any other protocols either currently known or to be developed in the future.
  • Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will of course also be future type communication technologies and systems with which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the a
  • the term “network device” refers to a node in a communication network via which a terminal device accesses the network and receives services therefrom.
  • the network device may refer to a base station (BS) or an access point (AP) , for example, a node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a NR NB (also referred to as a gNB) , a Remote Radio Unit (RRU) , a radio header (RH) , a remote radio head (RRH) , a relay, a low power node such as a femto, a pico, and so forth, depending on the applied terminology and technology.
  • BS base station
  • AP access point
  • NodeB or NB node B
  • eNodeB or eNB evolved NodeB
  • NR NB also referred to as a gNB
  • RRU Remote Radio Unit
  • RH radio header
  • terminal device refers to any end device that may be capable of wireless communication.
  • a terminal device may also be referred to as a communication device, user equipment (UE) , a Subscriber Station (SS) , a Portable Subscriber Station, a Mobile Station (MS) , or an Access Terminal (AT) .
  • UE user equipment
  • SS Subscriber Station
  • MS Mobile Station
  • AT Access Terminal
  • the terminal device may include, but not limited to, a mobile phone, a cellular phone, a smart phone, voice over IP (VoIP) phones, wireless local loop phones, a tablet, a wearable terminal device, a personal digital assistant (PDA) , portable computers, desktop computer, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback appliances, vehicle-mounted wireless terminal devices, self-driving cars, wireless endpoints, mobile stations, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , USB dongles, smart devices, wireless customer-premises equipment (CPE) , an Intemet of Things (loT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device and applications (e.g., remote surgery) , an industrial device and applications (e.g., a robot and/or other wireless devices operating in an industrial and/or an automated processing chain contexts) , a consumer electronics
  • Fig. 1 is a schematic diagram of a communication environment 100 in which embodiments of the present disclosure can be implemented.
  • the communication environment 100 may comprise a network device 110, which provides wireless connections for a plurality of terminal devices 120 and 130 within its coverage.
  • the terminal devices 120 and 130 may communicate with the network device 110 via channels such as wireless transmission channels 115 and 125, respectively.
  • the channels 115 and 125 may be referred to as downlink channels, whereas for transmissions from the terminal devices 120 and 130 to the network device 110, the channels 115 and 125 may alternatively be referred to as uplink channels. Additionally, the terminal devices 120 and 130 may communicate with each other via a device-to-device (D2D) link 135 or communicate with each other or towards the network device 110 via relay type links (not shown in Fig. 1) .
  • D2D device-to-device
  • the communication environment 100 may include any suitable number of network devices and any suitable number of terminal devices adapted for implementing embodiments of the present disclosure.
  • Communications in the communication environment 100 may be implemented according to any proper communication protocol (s) , comprising, but not limited to, cellular communication protocols of the first generation (1G) , the second generation (2G) , the third generation (3G) , the fourth generation (4G) and the fifth generation (5G) and on the like, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and/or any other protocols currently known or to be developed in the future.
  • s cellular communication protocols of the first generation (1G) , the second generation (2G) , the third generation (3G) , the fourth generation (4G) and the fifth generation (5G) and on the like, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and/or any other protocols currently known or to be developed in the future.
  • IEEE Institute for Electrical and Electronics Engineers
  • the communication may utilize any proper wireless communication technology, comprising but not limited to: Code Divided Multiple Address (CDMA) , Frequency Divided Multiple Address (FDMA) , Time Divided Multiple Address (TDMA) , Frequency Divided Duplexer (FDD) , Time Divided Duplexer (TDD) , Multiple-Input Multiple-Output (MIMO) , Orthogonal Frequency Divided Multiple Access (OFDMA) and/or any other technologies currently known or to be developed in the future.
  • CDMA Code Divided Multiple Address
  • FDMA Frequency Divided Multiple Address
  • TDMA Time Divided Multiple Address
  • FDD Frequency Divided Duplexer
  • TDD Time Divided Duplexer
  • MIMO Multiple-Input Multiple-Output
  • OFDMA Orthogonal Frequency Divided Multiple Access
  • the network device 110 and the terminal device 120, 130 may transmit a wireless signal based on subcarrier spacing (SCS) in use, which is associated with a type of numerology. For example, if a transmitting device uses two different subcarrier spacing values to transmit a same data sequence, the transmitting device may actually transmit two different signals carrying the same data sequence. In particular, the two signals may be different in signal duration, or the like.
  • SCS subcarrier spacing
  • multiple numerologies are supported in a NR system.
  • a preamble is transmitted, if each type of numerology has its own version of preamble, a receiver needs to monitor multiple versions of preamble using multiple Fast Fourier Transform (FFT) sizes simultaneously, which is not possible for a single radio frequency (RF) chain.
  • FFT Fast Fourier Transform
  • transmitters/receivers need to switch their working numerologies to the pre-defined numerology, which introduces additional delay and complexity.
  • embodiments of the present disclosure provides a solution related to a common signal structure for multiple numerologies.
  • different numerologies may use different comb values in resource elements in frequency domain, and use different numbers of resource elements in time domain, so as to generate signals with a common signal structure in time domain.
  • linear phase rotations are applied to elements of the data sequence, which linear phase rotations may vary with an index of a resource element in time domain (also referred to as OFDM symbol-dependent) .
  • both transmitting operations at a transmitter and receiving operations at a receiver are simplified.
  • transmitters do not need to switch their working numerologies to the pre-defined numerology for performing transmission, and receivers do not need to monitor multiple versions of the data sequence using multiple FFT sizes simultaneously.
  • some embodiments of the present disclosure will be detailed with reference to Figs. 2-9.
  • Fig. 2 shows a flowchart of an example method 200 in accordance with some embodiments of the present disclosure.
  • the method 200 can be implemented at a network device, such as the network device 110 as shown in Fig. 1.
  • the method 200 can also be implemented at a terminal device, such as the terminal devices 120 and 130 as shown in Fig. 1.
  • the example method 200 may be used for either or both of uplink and downlink transmissions, and may be performed at either or both of a network device and a terminal device in communication with each other.
  • the example method 200 may also be used for D2D communications between terminal devices.
  • the method 200 will be described with reference to Fig. 1 and described as being performed by the terminal device 120 without loss of generality.
  • the terminal device 120 obtains a data sequence for transmitting to the network device 110 or the terminal device 130, for example.
  • the data sequence may be a predefined or known sequence including a series of 0 and 1, such as a preamble for performing random access, a preamble before a transmission burst, and various preambles or reference signals as defined in 3GPP specifications.
  • elements of the data sequence can be information complex values, which may be modulation symbols generated from data to be transmitted from the terminal device 120 to the network device 110 or the terminal device 130, for example.
  • the data may include any data that can be transmitted among network devices and terminal devices, including user plane data, control plane data, or the like.
  • the terminal device 120 in transmitting the data sequence, it is desirable to transmit a signal with a same signal structure regardless of the subcarrier spacing (or the numerology) used by the terminal device 120.
  • the terminal device 120 also obtains a signal structure defining signal duration and a number of repeated parts, so that the terminal device 120 may transmit a signal carrying the data sequence based on the signal structure.
  • the signal transmitted by the terminal device 120 may have the signal duration and the number of repeated parts defined by the signal structure.
  • the signal structure may be configured and informed to the terminal device 120 by the network device 110.
  • the signal structure may be predefined in the communication environment 100.
  • the terminal device 120 determines, based on subcarrier spacing in use and the obtained signal structure, a pattern for mapping the data sequence to a plurality of resource elements.
  • the terminal device 120 may map the data sequence (that is, its elements) to a plurality of resource elements.
  • one resource element refers to one subcarrier by one OFDM symbol.
  • a resource element may be identified by an index of the resource element in frequency domain (for example, an index of the subcarrier) and an index of the resource element in time domain (for example, an index of the OFDM symbol) .
  • the terminal device 120 determines which resource elements the data sequence are mapped to.
  • the pattern for mapping the data sequence to the plurality of resource elements may determine the signal structure of the signal actually transmitted by the terminal device 120. Therefore, in order to transmit a signal with a same signal structure regardless of the subcarrier spacing (or the numerology) in use, the terminal device 120 may employ different patterns associated with different subcarrier spacing values. This is further detailed with reference to an example as depicted in Fig. 3.
  • Fig. 3 shows different patterns 310, 320, and 330 associated with different subcarrier spacing values for mapping a data sequence to resource elements such that a transmitted signal 340 carrying the data sequence is the same in time domain for the different subcarrier spacing values in accordance with some embodiments of the present disclosure.
  • a data sequence ⁇ a, b, c, d ⁇ is transmitted by the terminal device 120 and mapped to the resource elements.
  • a data sequence of a particular length (four) is shown herein for example, it is understood that embodiments of the present disclosure may be equally applicable to data sequence of any suitable length.
  • a horizontal direction refers to time domain and a vertical direction refers to frequency domain.
  • the example pattern 310 is associated with a subcarrier spacing value of 15 kHz, and a resource element 312 is a subcarrier of 15 kHz in frequency domain by about 66.7 microseconds ( ⁇ s) in time domain.
  • the example pattern 320 is associated with a subcarrier spacing value of 30 kHz, and a resource element 322 is a subcarrier of 30 kHz in frequency domain by about 33.3 ⁇ s in time domain.
  • the example pattern 330 is associated with a subcarrier spacing value of 60 kHz, and a resource element 332 is a subcarrier of 60 kHz in frequency domain by about 16.7 ⁇ s in time domain.
  • the terminal device 120 uses a subcarrier spacing value of 15 kHz, the elements “a, ” “b, ” “c, ” and, “d” of the data sequence are mapped to the resource elements 312, 314, 316, and 318, respectively, and other resource elements are null.
  • the element “a” is mapped to two contiguous resource elements in time domain including the resource element 322
  • the element “b” is mapped to two contiguous resource elements in time domain including the resource element 324
  • the element “c” is mapped to two contiguous resource elements in time domain including the resource element 326
  • the element “d” is mapped to two contiguous resource elements in time domain including the resource element 328.
  • Other resource elements are null.
  • the element “a” is mapped to four contiguous resource elements in time domain including the resource element 332
  • the element “b” is mapped to four contiguous resource elements in time domain including the resource element 334
  • the element “c” is mapped to four contiguous resource elements in time domain including the resource element 336
  • the element “d” is mapped to four contiguous resource elements in time domain including the resource element 338.
  • a distance (also referred to as a comb value) between the centers of two successive used resources elements is 4 subcarriers in frequency domain, and the data sequence is to be transmitted once in time domain.
  • a distance between the centers of two successive used resources elements is 2 subcarriers in frequency domain, and the data sequence is to be transmitted twice in time domain.
  • a distance between the centers of two successive used resources elements is 1 subcarrier in frequency domain, and the data sequence is to be transmitted four times in time domain.
  • IFFT Inverse Fast Fourier Transform
  • the specific patterns 310, 320, 330 and the specific signal structure of the signal 340 as shown in Fig. 1 are only for the purpose of illustration without suggesting any limitations.
  • the signal 340 may have any suitable signal duration and any suitable number of repeated parts, and thus the patterns 310, 320, 330 may have corresponding comb values in frequency domain and corresponding numbers of resource elements in time domain.
  • the specific values of subcarrier spacing are only examples without any limitations. In other embodiments, the subcarrier spacing in use may be any suitable value.
  • the terminal device 120 may select a predetermined pattern associated with the subcarrier spacing in use for generating the intended signal. In some other embodiments, in determining the mapping pattern, the terminal device 120 may separately determine the comb value in frequency domain and the number of resource elements in time domain. Therefore, the terminal device 120 may determine, based on the subcarrier spacing in use and the defined number of repeated parts of the signal structure, a distance between two successive resource elements in frequency domain for transmitting the signal carrying the data sequence.
  • the terminal device 120 may determine the distance as four subcarriers based on the number 4 of the repeated parts and the 15 kHz subcarrier spacing. As another example, if the terminal device 120 uses a subcarrier spacing value of 30 kHz, the terminal device 120 may determine the distance as two subcarriers based on the number 4 of the repeated parts and the 30 kHz subcarrier spacing. As a further example, if the terminal device 120 uses a subcarrier spacing value of 60 kHz, the terminal device 120 may determine the distance as one subcarrier based on the number 4 of the repeated parts and the 60 kHz subcarrier spacing.
  • different subcarrier spacing values correspond to different time lengths of one resource element, such as, one OFDM symbol.
  • the terminal device 120 may need to use different numbers of contiguous resource elements in time domain for transmitting the signal 340 with the defined signal duration, in case of different subcarrier spacing values.
  • the terminal device 120 may determine a time length of each of the plurality of resource elements based on the subcarrier spacing in use. For example, for subcarrier spacing values of 15 kHz, 30 kHz, and 60 kHz, the terminal device 120 determines a time length of 66.7 ⁇ s, 33.3 ⁇ s, and 16.7 ⁇ s, respectively.
  • the terminal device 120 may determine, based on the time length and the signal duration of the signal 340, a number of contiguous resource elements in time domain for transmitting the signal.
  • the defined signal duration of the signal 340 is 66.7 ⁇ m.
  • the terminal device 120 determines the number of contiguous resource elements in time domain as one, two, and four, respectively. Through determining the comb value in frequency domain and the number of resource elements in time domain in a separate manner, the terminal device 120 may determine the mapping pattern more flexibly.
  • the terminal device 120 transmits a signal carrying the data sequence based on the determined pattern, such that the transmitted signal has the signal structure.
  • the mapping pattern is determined according to the signal structure, and thus the transmitted signal based on the mapping pattern conforms to the desired signal structure. In this way, even if the terminal device 120 uses different subcarrier spacing values to transmit the data sequence, the transmitted signal carrying the data sequence remains unchanged.
  • the terminal device 120 transmits the data sequence using a plurality of contiguous resource elements in time domain. That is, the terminal device 120 transmits the data sequence in time domain for a plurality of times. For every transmission, the terminal device 120 may map the data sequence to the determined resource elements in frequency domain (for example, subcarriers) , perform IFFT on the mapped data sequence, and then transmit the transformed data sequence in time domain. Transmitting the data sequence for the plurality of times constitutes the desired signal with the intended signal structure.
  • the terminal device 120 may map the data sequence to the determined resource elements in frequency domain (for example, subcarriers) , perform IFFT on the mapped data sequence, and then transmit the transformed data sequence in time domain. Transmitting the data sequence for the plurality of times constitutes the desired signal with the intended signal structure.
  • the signal structure may include a cyclic prefix, for example, each resource element in time domain (such as OFDM symbol) in the signal structure may have a respective cyclic prefix.
  • each resource element in time domain (such as OFDM symbol) in the signal structure may have a respective cyclic prefix.
  • Fig. 4 shows various transmitted or received signals 410, 420, 430, and 440 carrying a data sequence associated with different subcarrier spacing values in case that a cyclic prefix is inserted in accordance with some embodiments of the present disclosure.
  • Fig. 4 depicts a signal 410 transmitted with a subcarrier spacing value of 15 kHz, a signal 420 received with a subcarrier spacing value of 60 kHz, a signal 430 transmitted with a subcarrier spacing value of 60 kHz, and a signal 440 received with a subcarrier spacing value of 15 kHz.
  • the signals 410 and 440 have only one OFDM symbol (OS) and respective associated cyclic prefixes 412 and 442.
  • the signals 420 and 430 each have four OFDM symbols, and thus have four associated cyclic prefixes 422, 424, 426, 428 and 432, 434, 436, 438, respectively. Due to the difference in cyclic prefixes under different subcarrier spacing values, if the signal 410 transmitted with a subcarrier spacing value of 15 kHz is received with a subcarrier spacing value of 60 kHz, the data sequence cannot be correctly extracted from the signal 410.
  • a common signal structure with a cyclic prefix in time domain may be defined for all values of subcarrier spacing, as further detailed in Fig. 5.
  • Fig. 5 shows that two transmitted signals 410 and 510 carrying a data sequence associated with different subcarrier spacing values are the same after linear phase rotation values are applied to the data sequence, in case that a cyclic prefix is inserted in accordance with some embodiments of the present disclosure.
  • the signal 410 is normally generated using a subcarrier spacing of 15 kHz and has the common signal structure with a cyclic prefix 412 in time domain.
  • linear phase rotations are applied to elements of the data sequence in frequency domain for each resource element in time domain (for example, OFDM symbol) , in order to make the normally generated signal in time domain is the same as the signal 410 having the common signal structure with a cyclic prefix.
  • the term “linear” means that the applied phase rotation value is linearly changed for different elements of the data sequence.
  • the linear phase rotations may vary with an index of a resource element in time domain, also referred to as OS-dependent.
  • the corresponding linear phase rotations in a reverse direction are applied to the received complex values associated with the data sequence for combining.
  • the terminal device 120 may apply linear phase rotation values to a plurality of elements of the data sequence before mapping the data sequence to the plurality of resource elements, such that the actually transmitted signal has the signal structure.
  • each of the phase rotation values may be determined based on the desired signal structure, the subcarrier spacing in use, an index of the resource element in frequency domain, an index of the resource element in time domain, or the like, and any combination thereof.
  • Fig. 6 shows a flowchart of another example method 600 in accordance with some embodiments of the present disclosure.
  • the method 600 can be implemented at a network device, such as the network device 110 as shown in Fig. 1.
  • the method 600 can also be implemented at a terminal device, such as the terminal devices 120 and 130 as shown in Fig. 1.
  • the example method 600 may be used for either or both of uplink and downlink transmissions, and may be performed at either or both of a network device and a terminal device in communication with each other.
  • the example method 600 may also be used for D2D communications between terminal devices.
  • the method 600 will be described with reference to Fig. 1 and described as being performed by the network device 110 without loss of generality.
  • the network device 110 receives a signal carrying a data sequence.
  • the signal is transmitted by the terminal device 120 according to the method 200 as described with reference to Fig. 2.
  • the network device 110 obtains a signal structure defining signal duration and a number of repeated parts.
  • the signal structure may be configured by the network device 110 or another network device.
  • the signal structure may be predefined in the communication environment 100.
  • the network device 110 determines, based on subcarrier spacing in use and the signal structure, a pattern for mapping the data sequence to a plurality of resource elements. In some embodiments, the network device 110 may determines the pattern in an analogous manner to that described with reference to Fig. 2.
  • the network device 110 may determine, based on the subcarrier spacing and the number of repeated parts, a distance between two successive resource elements in frequency domain for transmitting the signal. In some embodiments, the network device 110 may determine a time length of each of the plurality of resource elements based on the subcarrier spacing. Then, the network device 110 may determine, based on the time length and the signal duration, a number of contiguous resource elements in time domain for transmitting the signal.
  • the network device 110 may determine which resource elements the elements of the data sequence are mapped to, according to the subcarrier spacing used by the network device 110. Thus, at block 640, the network device 110 may obtain the data sequence from the signal based on the determined pattern.
  • the network device 110 may determine whether a phase rotation is needed for obtaining the data sequence, based on the signal structure and the subcarrier spacing. For example, if the time length of one resource element based on the subcarrier spacing in use is different from the signal duration of the desired signal structure, the network device 110 may determine that a phase rotation is needed. Alternatively, in case that the common signal structure with a cyclic prefix is determined based on reference subcarrier spacing, the network device 110 may determine that a phase rotation is needed if the subcarrier spacing in use is different from the reference subcarfier spacing.
  • the network device 110 may apply linear phase rotation values to a plurality of complex values in the received signal in frequency domain associated with a plurality of elements of the data sequence. In this way, the data sequence may be recovered from the received signal even if the signal has a cyclic prefix. In some embodiments, the network device 110 may determine the linear phase rotation values in a similar way to that described with reference to Fig. 2.
  • each of the phase rotation values may be determined based on the signal structure, the subcarrier spacing in use, an index of the resource element in frequency domain, an index of the resource element in time domain, or the like, and any combination thereof.
  • an FFT size is 2048 and a cyclic prefix length is 144 (if a cyclic prefix is inserted) .
  • an FFT size is 1024 and a cyclic prefix length is 72 (if a cyclic prefix is inserted) .
  • an FFT size is 512 and a cyclic prefix length is 36 (if a cyclic prefix is inserted) .
  • a sequence length of a data sequence is 300, that is, the data sequence has 300 elements.
  • a transmitting device employs a subcarrier spacing value of 15 kHz, a receiving device employs a subcarrier spacing value of 60 kHz, and a phase rotation is not applied.
  • a transmitting device employs a subcarrier spacing value of 60 kHz, a receiving device employs a subcarrier spacing value of 15 kHz, and a phase rotation is not applied.
  • a transmitting device employs a subcarrier spacing value of 15 kHz
  • a receiving device employs a subcarrier spacing value of 60 kHz, and a phase rotation is applied.
  • a transmitting device employs a subcarrier spacing value of 60 kHz, a receiving device employs a subcarrier spacing value of 15 kHz, and a phase rotation is applied.
  • the data sequence (complex value (a 0 , a 1 , a 2 , ..., a 299 ) ) is mapped to an interlace whose comb value is 4 and comb offset is 0, that is, d k+0 , d k+4 , d k+8 , ..., d k+1196 , in frequency domain, where k is a multiple of 4.
  • d n , n ⁇ k+0, k+4, k+8, ..., k+1196 is set to 0.
  • the resource elements (REs) (d 0 , d 1 , d 2 , ..., d 2047 ) in frequency domain are converted to a time domain baseband signal s 0 , s 1 , s 2 , ..., s 2047 by IFFT, where
  • the four received OFDM symbols are If a cyclic prefix is inserted, the four received OFDM symbols excluding the cyclic prefixes are Then, the received u-th OFDM symbol is converted to frequency domain REs
  • ⁇ r denotes a receiving power factor
  • ⁇ r denotes a receiving power factor
  • other notations are consistent with the 3GPP specifications.
  • the data sequence (complex value (a 0 , a 1 , a 2 , ..., a 299 ) ) is mapped to contiguous resources, namely, d k+0 , d k+1 , d k+2 , ..., d k+299 , in frequency domain, where k is the start frequency.
  • d n , n ⁇ k+0, k+1, k+2, ..., k+299 is set to 0.
  • the REs (d 0 , d 1 , d 2 , ..., d 511 ) in frequency domain are converted to time domain baseband signal of an OFDM symbol s 0 , s 1 , s 2 , ..., s 511 by IFFT, where
  • ⁇ t denotes a transmitting power factor, and other notations are consistent with the 3GPP specifications. If a cyclic prefix is inserted, the final baseband signal in time domain of an OFDM symbol is set to where mod denotes a modulo operation, and other notations are consistent with the 3GPP specifications.
  • the final baseband signal in time domain (s 0 , s 1 , s 2 , ..., s 511 ) or is repeatedly transmitted four times, namely, four OFDM symbols.
  • ⁇ r denotes a receiving power factor
  • ⁇ r denotes a receiving power factor
  • b i e 4 (k+i) .
  • Theoretically, by choosing a proper transmitting/receiving power factor, it can be obtained that (a 0 , a 1 , a 2 , ..., a 299 ) (b 0 , b 1 , b 2 , ..., b 299 ) for the case of no cyclic prefixes and no noise.
  • Fig. 7 shows a simulation result of performance (in term of autocorrelation peak) of data sequence transmission without a cyclic prefix in accordance with some embodiments of the present disclosure, where multiple signal-to-noise ratio (SNR) levels are evaluated.
  • SNR signal-to-noise ratio
  • the horizontal axis refers to OFDM index
  • the vertical axis refers to Cumulative Distribution Function (CDF)
  • a curve 710 refers to no signal
  • a curve 720 refers to SNR of-10 dB
  • a curve 730 refers to SNR of-5 dB
  • a curve 740 refers to SNR of 0 dB
  • a curve 750 refers to SNR of 5 dB
  • a curve 760 refers to SNR of 10 dB
  • Fig. 8 shows a simulation result of performance (in term of autocorrelation peak) of data sequence transmission with a cyclic prefix in accordance with some embodiments of the present disclosure.
  • the horizontal axis refers to OFDM index
  • the vertical axis refers to CDF
  • a curve 810 refers to no signal
  • a curve 820 refers to SNR of-10 dB
  • a curve 830 refers to SNR of-5 dB
  • a curve 840 refers to SNR of 0 dB
  • a curve 850 refers to SNR of 5 dB
  • a curve 860 refers to SNR of 10 dB
  • a curve 870 refers to no noise.
  • the phase rotation is applied in the third and fourth simulations.
  • the third simulation at a transmitting device using a subcarrier spacing value of 15 kHz, it is the same as that described in the first simulation and is not repeated here.
  • the four received OFDM symbols excluding cyclic prefixes are Then, the received u-th OFDM symbol is converted to frequency domain REs
  • ⁇ r denotes a receiving power factor
  • ⁇ r denotes a receiving power factor
  • other notations are consistent with the 3GPP specifications.
  • the final received data sequence (b 0 , b 1 , b 2 , ..., b 299 ) is obtained by Note that a phase rotation is applied on the combination.
  • (a 0 , a 1 , a 2 , ..., a 299 ) (b 0 , b 1 , b 2 , ..., b 299 ) for the case of an inserted cyclic prefix and no noise using the phase rotation.
  • the data sequence (complex value (a 0 , a 1 , a 2 , ..., a 299 ) ) may be mapped to contiguous resource elements in frequency domain, that is, d k+0 , d k+1 , d k+2 , ..., d k+299 , where k is the start frequency.
  • Other d n , n ⁇ k+0, k+1, k+2, ..., k+299 is set to 0.
  • OFDM symbol-dependent linear phase rotations are applied on four OFDM symbols. Specifically, for the u-th OFDM symbol (1 ⁇ u ⁇ 4 ) , the n-th resource element are The resource element in frequency domain is converted to time domain baseband signal of an OFDM symbol by IFFT, where
  • ⁇ t denotes a transmitting power factor, and other notations are consistent with the 3GPP specifications.
  • the final time domain baseband signal of an OFDM symbol is set to where mod denotes a modulo operation, and other notations are consistent with the 3GPP specifications.
  • the final baseband signals in time domain of four OFDM symbols are transmitted consecutively.
  • the received OFDM symbol excluding the cyclic prefix is Then, the received OFDM symbol is converted to frequency domain resource elements
  • ⁇ r denotes a receiving power factor
  • ⁇ r denotes a receiving power factor
  • b i e 4 (k+i) .
  • Theoretically, by choosing a proper transmitting/receiving power factor, it can be obtained that (a 0 , a 1 , a 2 , ..., a 299 ) (b 0 , b 1 , b 2 , ..., b 299 ) for the case of inserted cyclic prefixes and no noise using the phase rotation.
  • Fig. 9 shows a simulation result of performance (in term of autocorrelation peak) of data sequence transmission with a cyclic prefix and a phase rotation in accordance with some embodiments of the present disclosure, where multiple SNR levels are evaluated.
  • the horizontal axis refers to OFDM index
  • the vertical axis refers to CDF
  • a curve 910 refers to no signal
  • a curve 920 refers to SNR of-10 dB
  • a curve 930 refers to SNR of-5 dB
  • a curve 940 refers to SNR of 0 dB
  • a curve 950 refers to SNR of 5 dB
  • a curve 960 refers to SNR of 10 dB
  • a curve 970 refers to no noise. It can be observed that the detectability of the preamble is nearly equal to that shown in Fig. 7. This means that the issue caused by an inserted cyclic prefix can be solved using the OFDM symbol-dependent phase rotation.
  • an apparatus for performing the method 200 may comprise respective means for performing the corresponding steps in the method 200.
  • These means may be implemented in any suitable manners. For example, it can be implemented by circuitry or software modules or a combination thereof.
  • the apparatus comprises: means for obtaining a data sequence and a signal structure defining signal duration and a number of repeated parts; means for determining, based on subcarrier spacing in use and the signal structure, a pattern for mapping the data sequence to a plurality of resource elements; and means for transmitting a signal carrying the data sequence based on the determined pattern, such that the transmitted signal has the signal structure.
  • the means for determining the pattern comprises: means for determining, based on the subcarrier spacing and the number of repeated parts, a distance between two successive resource elements in frequency domain for transmitting the signal.
  • the means for determining the pattern comprises: means for determining a time length of each of the plurality of resource elements based on the subcarrier spacing; and means for determining, based on the time length and the signal duration, a number of contiguous resource elements in time domain for transmitting the signal.
  • the apparatus further comprises: means for in response to determining that the signal structure comprises a cyclic prefix, for each of the contiguous resource elements in time domain, applying linear phase rotation values to a plurality of elements of the data sequence before mapping the data sequence to the plurality of resource elements, such that the signal has the signal structure.
  • each of the phase rotation values is determined based on at least one of: the signal structure; the subcarrier spacing; an index of the resource element in frequency domain; and an index of the resource element in time domain.
  • the signal structure is configured by a network device or is predefined.
  • an apparatus for performing the method 600 may comprise respective means for performing the corresponding steps in the method 600.
  • These means may be implemented in any suitable manners. For example, it can be implemented by circuitry or software modules or a combination thereof.
  • the apparatus comprises: means for receiving a signal carrying a data sequence; means for obtaining a signal structure defining signal duration and a number of repeated parts; means for determining, based on subcarrier spacing in use and the signal structure, a pattern for mapping the data sequence to a plurality of resource elements; and means for obtaining the data sequence from the signal based on the determined pattern.
  • the means for determining the pattern comprises: means for determining, based on the subcarrier spacing and the number of repeated parts, a distance between two successive resource elements in frequency domain for transmitting the signal.
  • the means for determining the pattern comprises: means for determining a time length of each of the plurality of resource elements based on the subcarrier spacing; and means for determining, based on the time length and the signal duration, a number of contiguous resource elements in time domain for transmitting the signal.
  • the apparatus further comprises: means for determining whether a phase rotation is needed for obtaining the data sequence, based on the signal structure and the subcarrier spacing; and means for in response to determining that a phase rotation is needed, for each of the contiguous resource elements in time domain, applying linear phase rotation values to a plurality of complex values in the signal in frequency domain associated with a plurality of elements of the data sequence.
  • each of the phase rotation values is determined based on at least one of: the signal structure; the subcarrier spacing; an index of the resource element in frequency domain; and an index of the resource element in time domain.
  • the signal structure is configured by a network device or is predefined.
  • Fig. 10 is a simplified block diagram of a device 1000 that is suitable for implementing embodiments of the present disclosure.
  • the device 1000 can be considered as a further example embodiment of the network device 110 and the terminal devices 120, 130 as shown in Fig. 1. Accordingly, the device 1000 can be implemented at or as at least a part of the network device 110 or the terminal device 120, 130.
  • the device 1000 includes a processor 1010, a memory 1020 coupled to the processor 1010, a suitable transmitter (TX) and receiver (RX) 1040 coupled to the processor 1010, and a communication interface coupled to the TX/RX 1040.
  • the memory 1020 stores at least a part of a program 1030.
  • the TX/RX 1040 is for bidirectional communications.
  • the TX/RX 1040 has at least one antenna to facilitate communication.
  • the communication interface may represent any interface that is necessary for communication with other network elements, such as X2 interface for bidirectional communications between eNBs, S 1 interface for communication between a Mobility Management Entity (MME) /Serving Gateway (S-GW) and the eNB, Un interface for communication between the eNB and a relay node (RN) , or Uu interface for communication between the eNB and a terminal device.
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • Un interface for communication between the eNB and a relay node (RN)
  • Uu interface for communication between the eNB and a terminal device.
  • the program 1030 is assumed to include program instructions that, when executed by the associated processor 1010, enable the device 1000 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to Figs. 1 to 9.
  • the embodiments herein may be implemented by computer software executable by the processor 1010 of the device 1000, or by hardware, or by a combination of software and hardware.
  • the processor 1010 may be configured to implement various embodiments of the present disclosure.
  • a combination of the processor 1010 and memory 1020 may form processing means 1050 adapted to implement various embodiments of the present disclosure.
  • the memory 1020 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 1020 is shown in the device 1000, there may be several physically distinct memory modules in the device 1000.
  • the processor 1010 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples.
  • the device 1000 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
  • the components included in the apparatuses and/or devices of the present disclosure may be implemented in various manners, including software, hardware, firmware, or any combination thereof.
  • one or more units may be implemented using software and/or firmware, for example, machine-executable instructions stored on the storage medium.
  • parts or all of the units in the apparatuses and/or devices may be implemented, at least in part, by one or more hardware logic components.
  • FPGAs Field-programmable Gate Arrays
  • ASICs Application-specific Integrated Circuits
  • ASSPs Application-specific Standard Products
  • SOCs System-on-a-chip systems
  • CPLDs Complex Programmable Logic Devices
  • various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it will be appreciated that the blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • the present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium.
  • the computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the process or method as described above with reference to any of Figs. 2 and 6.
  • program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types.
  • the functionality of the program modules may be combined or split between program modules as desired in various embodiments.
  • Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
  • Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented.
  • the program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
  • the above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
  • the machine readable medium may be a machine readable signal medium or a machine readable storage medium.
  • a machine readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.
  • machine readable storage medium More specific examples of the machine readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • RAM random access memory
  • ROM read-only memory
  • EPROM or Flash memory erasable programmable read-only memory
  • CD-ROM portable compact disc read-only memory
  • magnetic storage device or any suitable combination of the foregoing.
  • any method step is suitable to be implemented as software or by hardware without changing the idea of the invention in terms of the functionality implemented;
  • MOS Metal Oxide Semiconductor
  • CMOS Complementary MOS
  • BiMOS Bipolar MOS
  • BiCMOS Bipolar CMOS
  • ECL emitter Coupled Logic
  • TTL Transistor-Transistor Logic
  • ASIC Application Specific IC
  • FPGA Field-programmable Gate Arrays
  • CPLD Complex Programmable Logic Device
  • DSP Digital Signal Processor
  • - devices, units or means can be implemented as individual devices, units or means, but this does not exclude that they are implemented in a distributed fashion throughout the system, as long as the functionality of the device, unit or means is preserved;
  • an apparatus may be represented by a semiconductor chip, a chipset, or a (hardware) module comprising such chip or chipset; this, however, does not exclude the possibility that a functionality of an apparatus or module, instead of being hardware implemented, be implemented as software in a (software) module such as a computer program or a computer program product comprising executable software code portions for execution/being run on a processor;
  • a device may be regarded as an apparatus or as an assembly of more than one apparatus, whether functionally in cooperation with each other or functionally independently of each other but in a same device housing, for example.

Landscapes

  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
PCT/CN2019/071381 2019-01-11 2019-01-11 Common signal structure for multiple numerologies WO2020143032A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2019/071381 WO2020143032A1 (en) 2019-01-11 2019-01-11 Common signal structure for multiple numerologies
CN201980088537.9A CN113302867B (zh) 2019-01-11 2019-01-11 用于多种参数集的公共信号结构

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/071381 WO2020143032A1 (en) 2019-01-11 2019-01-11 Common signal structure for multiple numerologies

Publications (1)

Publication Number Publication Date
WO2020143032A1 true WO2020143032A1 (en) 2020-07-16

Family

ID=71520206

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/071381 WO2020143032A1 (en) 2019-01-11 2019-01-11 Common signal structure for multiple numerologies

Country Status (2)

Country Link
CN (1) CN113302867B (zh)
WO (1) WO2020143032A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114079545A (zh) * 2020-08-11 2022-02-22 北京紫光展锐通信技术有限公司 定位参考信号的发送方法、装置、设备及存储介质
WO2022127819A1 (en) * 2020-12-15 2022-06-23 Qualcomm Incorporated Sequence processing for a dataset with frame dropping

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017096131A1 (en) * 2015-12-03 2017-06-08 Idac Holdings, Inc. Use of both cyclic prefix and zero tail in dft-spread-ofdm
CN107483166A (zh) * 2016-06-08 2017-12-15 上海朗帛通信技术有限公司 一种无线通信中的方法和装置
CN107801247A (zh) * 2016-09-07 2018-03-13 上海朗帛通信技术有限公司 一种支持可变的子载波间距的ue、基站中的方法和设备
CN108012329A (zh) * 2017-09-27 2018-05-08 华为技术有限公司 一种寻呼的方法、通信定时的方法和装置
CN108023703A (zh) * 2016-11-04 2018-05-11 华为技术有限公司 通信方法和通信装置
CN108347293A (zh) * 2017-01-24 2018-07-31 华为技术有限公司 传输方法及装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3343859B1 (en) * 2015-11-02 2020-02-12 Samsung Electronics Co., Ltd. Method and apparatus for transmitting or receiving a reference signal in a beamforming communication system
US10412745B2 (en) * 2016-11-30 2019-09-10 Telefonaktiebolaget Lm Ericsson (Publ) Peak-to-average power ratio reduction in multiuser MIMO systems
CN108809385B (zh) * 2017-05-05 2020-06-23 上海诺基亚贝尔股份有限公司 利用多天线的信号发送和接收方法、设备和计算机可读介质

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017096131A1 (en) * 2015-12-03 2017-06-08 Idac Holdings, Inc. Use of both cyclic prefix and zero tail in dft-spread-ofdm
CN107483166A (zh) * 2016-06-08 2017-12-15 上海朗帛通信技术有限公司 一种无线通信中的方法和装置
CN107801247A (zh) * 2016-09-07 2018-03-13 上海朗帛通信技术有限公司 一种支持可变的子载波间距的ue、基站中的方法和设备
CN108023703A (zh) * 2016-11-04 2018-05-11 华为技术有限公司 通信方法和通信装置
CN108347293A (zh) * 2017-01-24 2018-07-31 华为技术有限公司 传输方法及装置
CN108012329A (zh) * 2017-09-27 2018-05-08 华为技术有限公司 一种寻呼的方法、通信定时的方法和装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114079545A (zh) * 2020-08-11 2022-02-22 北京紫光展锐通信技术有限公司 定位参考信号的发送方法、装置、设备及存储介质
WO2022127819A1 (en) * 2020-12-15 2022-06-23 Qualcomm Incorporated Sequence processing for a dataset with frame dropping

Also Published As

Publication number Publication date
CN113302867A (zh) 2021-08-24
CN113302867B (zh) 2023-08-08

Similar Documents

Publication Publication Date Title
US11190328B2 (en) Methods and devices for reference signal configuration
US11737097B2 (en) Methods and apparatuses for transmitting control information
WO2019214383A1 (zh) 准共址信息的配置方法、网络设备及用户设备
CN113692000B (zh) 接收公共控制消息的方法、终端及存储介质
EP4192091A1 (en) Interference rejection combining method, resource indication method and communication apparatus
EP3691363B1 (en) Base station and user equipment
US20230246771A1 (en) Methods and apparatuses for reference signal transmission
WO2020087473A1 (en) Reference signal transmission
US11134455B2 (en) Synchronization signal transmitting or receiving method, base station, and user equipment
US20230029215A1 (en) Reference Signal Transmission Method and Apparatus
JP2023545819A (ja) 通信における残留時間周波数誤差の補償
WO2020244728A1 (en) Dynamic discrete fourier transform or bandwidth size indication
JP2018514115A (ja) 送信パターン構成および信号検出のための方法および装置
WO2020143032A1 (en) Common signal structure for multiple numerologies
WO2019232726A1 (en) Methods, device and computer-readable medium for determining timing advance
US20230336304A1 (en) Method, device and computer readable medium for communication
EP3614611B1 (en) Communication method and device
WO2022027485A1 (en) Methods for communication, terminal device, network device and computer-readable media
WO2021026912A1 (en) Transmission and reception of downlink control information
WO2021258365A1 (en) Methods, devices, and computer readable medium for communication
WO2021114045A1 (en) Method, device and computer storage medium for communication
WO2021035632A1 (en) Dmrs transmission
WO2024069591A1 (en) Devices, methods and apparatuses for srs enhancement
EP4140215A1 (en) Methods for communication, terminal device, network device, and computer readable media

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: 19908622

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: 19908622

Country of ref document: EP

Kind code of ref document: A1