WO2023133829A1 - Procédé, dispositif et support de stockage informatique de communication - Google Patents

Procédé, dispositif et support de stockage informatique de communication Download PDF

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Publication number
WO2023133829A1
WO2023133829A1 PCT/CN2022/072101 CN2022072101W WO2023133829A1 WO 2023133829 A1 WO2023133829 A1 WO 2023133829A1 CN 2022072101 W CN2022072101 W CN 2022072101W WO 2023133829 A1 WO2023133829 A1 WO 2023133829A1
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WIPO (PCT)
Prior art keywords
dci
waveform
length
transmitting
monitoring
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PCT/CN2022/072101
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English (en)
Inventor
Gang Wang
Lin Liang
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Nec Corporation
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Publication date
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Priority to PCT/CN2022/072101 priority Critical patent/WO2023133829A1/fr
Publication of WO2023133829A1 publication Critical patent/WO2023133829A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
    • 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 signaling, i.e. of overhead other than pilot signals

Definitions

  • Embodiments of the present disclosure generally relate to the field of telecommunication, and in particular, to methods, devices and computer storage media of communication for a dynamic waveform switching.
  • a waveform for an uplink (UL) transmission is semi-statically configured by a radio resource control (RRC) signaling to be orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform-spread-OFDM (DFT-s-OFDM) waveform.
  • RRC radio resource control
  • OFDM orthogonal frequency division multiplexing
  • DFT-s-OFDM discrete Fourier transform-spread-OFDM
  • a DFT-s-OFDM waveform has a lower peak to average power ratio (PAPR) than an OFDM waveform, and thus can support higher transmit power.
  • PAPR peak to average power ratio
  • a DFT-s-OFDM waveform has relatively lower spectrum efficiency than an OFDM waveform due to poorer frequency selective gain and only single layer transmission.
  • the waveform for the UL transmission may be switched from an OFDM waveform to a DFT-s-OFDM waveform or from a DFT-s-OFDM waveform to an OFDM waveform by a lower layer signaling.
  • solutions about the dynamic waveform switching are still incomplete and need to be further developed.
  • embodiments of the present disclosure provide methods, devices and computer storage media of communication for a dynamic waveform switching.
  • a method of communication comprises: receiving, at a terminal device, from a network device, a first configuration for a first waveform and a second configuration for a second waveform; determining, based on the first and second configurations, whether an uplink transmission is to be performed with the first or second waveform; in accordance with a determination that the uplink transmission is to be performed with the first waveform, performing the uplink transmission with the first waveform; and in accordance with a determination that the uplink transmission is to be performed with the second waveform, performing the uplink transmission with the second waveform.
  • a method of communication comprises: transmitting, at a network device and to a terminal device, a first configuration for a first waveform and a second configuration for a second waveform; determining, based on the first and second configurations, whether an uplink transmission is to be performed with the first or second waveform; in accordance with a determination that the uplink transmission is to be performed with the first waveform, receiving the uplink transmission with the first waveform; and in accordance with a determination that the uplink transmission is to be performed with the second waveform, receiving the uplink transmission with the second waveform.
  • a device of communication comprising a processor configured to perform the method according to the first aspect of the present disclosure.
  • a device of communication comprising a processor configured to perform the method according to the second aspect of the present disclosure.
  • a computer readable medium having instructions stored thereon.
  • the instructions when executed on at least one processor, cause the at least one processor to perform the method according to the first aspect of the present disclosure.
  • a computer readable medium having instructions stored thereon.
  • the instructions when executed on at least one processor, cause the at least one processor to perform the method according to the second aspect of the present disclosure.
  • FIG. 1 illustrates an example communication network in which some embodiments of the present disclosure can be implemented
  • FIG. 2 illustrates a schematic diagram illustrating a process of communication according to embodiments of the present disclosure
  • FIG. 3A illustrates a schematic diagram illustrating an example downlink control information (DCI) alignment according to embodiments of the present disclosure
  • FIG. 3B illustrates a schematic diagram illustrating another example DCI alignment according to embodiments of the present disclosure
  • FIG. 4 illustrates an example method of communication implemented at a terminal device in accordance with some embodiments of the present disclosure
  • FIG. 5 illustrates an example method of communication implemented at a network device in accordance with some embodiments of the present disclosure.
  • FIG. 6 is a simplified block diagram of a device that is suitable for implementing embodiments of the present disclosure.
  • terminal device refers to any device having wireless or wired communication capabilities.
  • the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, device on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure/network, devices for Integrated Access and Backhaul (IAB) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , eXtended Reality (XR) devices including different types of realities such as Augmented Reality (AR) , Mixed Reality (MR) and Virtual Reality (VR) , the unmanned aerial vehicle (UAV)
  • UE user equipment
  • the ‘terminal device’ can further has ‘multicast/broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4/IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporated one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM.
  • SIM Subscriber Identity Module
  • the term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
  • network device refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate.
  • a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , and the like.
  • NodeB Node B
  • eNodeB or eNB evolved NodeB
  • gNB next generation NodeB
  • TRP transmission reception point
  • RRU remote radio unit
  • RH radio head
  • RRH remote radio head
  • IAB node a low power node such as a fe
  • the terminal device or the network device may have Artificial intelligence (AI) or Machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
  • AI Artificial intelligence
  • Machine learning capability it generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
  • the terminal or the network device may work on several frequency ranges, e.g. FR1 (410 MHz to 7125 MHz) , FR2 (24.25GHz to 71GHz) , frequency band larger than 100GHz as well as Tera Hertz (THz) . It can further work on licensed/unlicensed/shared spectrum.
  • the terminal device may have more than one connections with the network devices under Multi-Radio Dual Connectivity (MR-DC) application scenario.
  • MR-DC Multi-Radio Dual Connectivity
  • the terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
  • test equipment e.g. signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator.
  • the terminal device may be connected with a first network device and a second network device.
  • One of the first network device and the second network device may be a master node and the other one may be a secondary node.
  • the first network device and the second network device may use different radio access technologies (RATs) .
  • the first network device may be a first RAT device and the second network device may be a second RAT device.
  • the first RAT device is eNB and the second RAT device is gNB.
  • Information related with different RATs may be transmitted to the terminal device from at least one of the first network device or the second network device.
  • first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device.
  • information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device.
  • Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
  • the singular forms ‘a’ , ‘an’ and ‘the’ are intended to include the plural forms as well, unless the context clearly indicates otherwise.
  • the term ‘includes’ and its variants are to be read as open terms that mean ‘includes, but is not limited to. ’
  • the term ‘based on’ is to be read as ‘at least in part based on. ’
  • the term ‘one embodiment’ and ‘an embodiment’ a re to be read as ‘at least one embodiment. ’
  • the term ‘another embodiment’ is to be read as ‘at least one other embodiment. ’
  • the terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
  • values, procedures, or apparatus are referred to as ‘best, ’ ‘lowest, ’ ‘highest, ’ ‘minimum, ’ ‘maximum, ’ or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
  • a terminal device receives, from a network device, a first configuration for a first waveform and a second configuration for a second waveform, and determines, based on the first and second configurations, whether an UL transmission is to be performed with the first or second waveform. If the uplink transmission is to be performed with the first waveform, the terminal device performs the UL transmission with the first waveform; and if the UL transmission is to be performed with the second waveform, the terminal device performs the UL transmission with the second waveform. In this way, a dynamic waveform switching can be achieved.
  • Embodiments of the present disclosure may be applied to any suitable scenarios.
  • embodiments of the present disclosure may be implemented for XR.
  • embodiments of the present disclosure can be implemented in one of the followings: reduced capability NR devices, NR multiple-input and multiple-output (MIMO) , NR sidelink enhancements, NR systems with frequency above 52.6GHz, an extending NR operation up to 71GHz, narrow band-Internet of Thing (NB-IOT) /enhanced Machine Type Communication (eMTC) over non-terrestrial networks (NTN) , NTN, UE power saving enhancements, NR coverage enhancement, NB-IoT and LTE-MTC, Integrated Access and Backhaul (IAB) , NR Multicast and Broadcast Services, or enhancements on Multi-Radio Dual-Connectivity.
  • NB-IOT narrow band-Internet of Thing
  • eMTC enhanced Machine Type Communication
  • NTN non-terrestrial networks
  • IAB Integrated Access and Backhaul
  • IAB
  • FIG. 1 illustrates a schematic diagram of an example communication network 100A in which some embodiments of the present disclosure can be implemented.
  • the communication network 100 may include a terminal device 110 and a network device 120.
  • the terminal device 110 may be served by the network device 120.
  • the communication network 100 may include any suitable number of network devices and/or terminal devices adapted for implementing implementations of the present disclosure.
  • the terminal device 110 may communicate with the network device 120 via a channel such as a wireless communication channel.
  • the communications in the communication network 100 may conform to any suitable standards including, but not limited to, Global System for Mobile Communications (GSM) , Long Term Evolution (LTE) , LTE-Evolution, LTE-Advanced (LTE-A) , New Radio (NR) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , GSM EDGE Radio Access Network (GERAN) , Machine Type Communication (MTC) and the like.
  • GSM Global System for Mobile Communications
  • LTE Long Term Evolution
  • LTE-Evolution LTE-Advanced
  • NR New Radio
  • WCDMA Wideband Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • GERAN GSM EDGE Radio Access Network
  • MTC Machine Type Communication
  • Examples of the communication protocols include, 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 fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.
  • the terminal device 110 may perform an UL transmission with an OFDM waveform.
  • a transform precoding is disabled.
  • the terminal device 110 may perform an UL transmission with a DFT-s-OFDM waveform.
  • the transform precoding is enabled.
  • the transform precoding is a DFT processing.
  • Embodiments of the present disclosure provide a solution of a dynamic waveform switching between an OFDM waveform and a DFT-s-OFDM waveform.
  • the dynamic waveform switching may be indicated by at least one of the following information: an radio network temporary identity (RNTI) ; a search space; a bit indication; a preamble resource; a demodulation reference signal (DMRS) group offset value; a DCI length; or a predetermined time delay for waveform switching.
  • RNTI radio network temporary identity
  • DMRS demodulation reference signal
  • FIG. 2 illustrates a schematic diagram illustrating a process 200 of communication according to embodiments of the present disclosure.
  • the process 200 will be described with reference to FIG. 1.
  • the process 200 may involve the terminal device 110 and the network device 120 as illustrated in FIG. 1.
  • the network device 120 transmits 210, to the terminal device 110, a configuration (for convenience, also referred to as a first configuration herein) for one waveform (for convenience, also referred to as a first waveform herein) and another configuration (for convenience, also referred to as a second configuration herein) for another waveform (for convenience, also referred to as a second waveform herein) .
  • the network device 120 may configure the first and second configurations to the terminal device 110 by a higher layer signaling such as a RRC signaling.
  • a higher layer signaling such as a RRC signaling
  • the first waveform is an OFDM waveform
  • the second waveform is a DFT-s-OFDM waveform.
  • the first waveform is a DFT-s-OFDM waveform
  • the second waveform is an OFDM waveform.
  • the first configuration may comprise at least one of the following information associated with the first waveform: an RNTI; a search space; a bit indication; a preamble resource; a DMRS group offset value; a DCI length; or a predetermined time delay for waveform switching.
  • the second configuration may comprise at least one of the following information associated with the second waveform: an RNTI; a search space; a bit indication; a preamble resource; a DMRS group offset value; a DCI length; or a predetermined time delay for waveform switching.
  • the terminal device 110 determines 220 whether an UL transmission is to be performed with the first or second waveform. In some embodiments, the terminal device 110 may perform the determination based on at least one of the following information associated with the first or second waveform: an RNTI; a search space; a bit indication; a preamble resource; a DMRS group offset value; a DCI length; or a predetermined time delay for waveform switching.
  • the terminal device 110 performs 230 the UL transmission with the first waveform. If determining that the UL transmission is to be performed with the second waveform, the terminal device 110 performs 240 the uplink transmission with the second waveform. For illustration, some example embodiments will be described below.
  • the terminal device 110 may perform, based on the first and second configurations, a monitoring on DCI (for convenience, also referred to as first DCI herein) for the first waveform and another DCI (for convenience, also referred to as second DCI herein) for the second waveform. If receiving the first DCI from the network device 120, the terminal device 110 may determine that the UL transmission is to be performed with the first waveform. If receiving the second DCI from the network device 120, the terminal device 110 may determine that the UL transmission is to be performed with the second waveform.
  • first DCI for convenience, also referred to as first DCI herein
  • second DCI for convenience, also referred to as second DCI herein
  • the terminal device 110 may align a length (for convenience, also referred to as a first length herein) of the first DCI and a length (for convenience, also referred to as a second length herein) of the second DCI to be an aligned length, and then perform the monitoring based on the aligned length.
  • a length for convenience, also referred to as a first length herein
  • a second length for convenience, also referred to as a second length herein
  • the terminal device 110 may pad one of corresponding fields of the first and second DCI having a smaller bit width with zero so that the corresponding fields have the same bit width.
  • the terminal device 110 does not expect that the bit width of a field in DCI format 0_1 with cyclic redundancy check (CRC) scrambled by cell-RNTI (C-RNTI) for DFT waveform (transformPrecoder ‘enabled’ ) is larger than corresponding bit width of same field in DCI format 0_1 with CRC scrambled by C-RNTI for OFDM waveform (transformPrecoder ‘disabled’ ) for the same serving cell.
  • CRC cyclic redundancy check
  • bit width of a field in the DCI format 0_1 with CRC scrambled by C-RNTI for DFT waveform is not equal to that of the corresponding field in the DCI format 0_1 with CRC scrambled by C-RNTI for OFDM waveform for the same serving cell, a number of most significant bits with value set to '0' are inserted to the field in DCI format 0_1 with CRC scrambled by C-RNTI for DFT waveform until the bit width equals that of the corresponding field in the DCI format 0_1 with CRC scrambled by C-RNTI for OFDM waveform for the same serving cell.
  • FIG. 3A illustrates a schematic diagram 300A illustrating an example DCI alignment according to embodiments of the present disclosure.
  • DCI for waveform A comprises fields 311, 312 and 313, and DCI for waveform B comprises fields 321, 322 and 323.
  • the bit width of the field 311 is equal to that of the field 321.
  • the bit width of the field 312 is smaller than that of the field 322.
  • the bit width of the field 313 is smaller than that of the field 323.
  • the terminal device 110 may pad the field 312 with zero as shown by 301 so that the bit width of the padded field 312 is equal to that of the field 322, and pad the field 313 with zero as shown by 302 so that the bit width of the padded field 313 is equal to that of the field 323.
  • the terminal device 110 may pad one of the first and second DCI having a smaller length with zero so that the first length is equal to the second length.
  • bit width of the DCI format 0_1 with CRC scrambled by C-RNTI for DFT waveform is not equal to that of the DCI format 0_1 with CRC scrambled by C-RNTI for OFDM waveform for the same serving cell, a number of bits with value set to '0' are padded to the DCI format 0_1 of smaller one until the bit width equals.
  • FIG. 3B illustrates a schematic diagram 300B illustrating another example DCI alignment according to embodiments of the present disclosure.
  • DCI for waveform A comprises fields 311, 312 and 313, and DCI for waveform B comprises fields 321, 322 and 323.
  • the bit width of the field 311 is equal to that of the field 321.
  • the bit width of the field 312 is smaller than that of the field 322.
  • the bit width of the field 313 is smaller than that of the field 323.
  • the terminal device 110 may pad the DCI for waveform A with zero as shown by 303 so that the length of the DCI for waveform A is equal to the length of the DCI for waveform B.
  • the terminal device 110 may also not align the first length of the first DCI with the second length of the second DCI.
  • DCI lengths for different waveforms are aligned, and different waveforms are associated with different RNTI values.
  • the first configuration may comprise a first RNTI associated with the first waveform and the second configuration may comprise a second RNTI associated with the second waveform. It is to be understood that the first and second RNTI may adopt any suitable forms.
  • the terminal device 110 may perform DCI monitoring on a common search space (CSS) and/or UE specific search space (USS) for the first and second RNTIs. If the terminal device 110 monitors DCI with the first RNTI, the terminal device 110 may determine that the first DCI is received. Then, the terminal device 110 may determine that the UL transmission is to be performed with the first waveform. If the terminal device 110 monitors DCI with the second RNTI, the terminal device 110 may determine that the second DCI is received. Then, the terminal device 110 may determine that the UL transmission is to be performed with the second waveform.
  • CCS common search space
  • USB UE specific search space
  • DCI overhead may be reduced, especially in low coverage cases where lower DCI overhead makes DL coverage better.
  • DCI lengths for different waveforms are aligned, and different waveforms are associated with different search spaces.
  • a waveform indication may be configured in each CSS and/or USS through dedicate RRC signaling.
  • a waveform indication may be configured in a CSS through broadcasting RRC signaling.
  • the first configuration may comprise a first search space associated with the first waveform and the second configuration may comprise a second search space associated with the second waveform.
  • the terminal device 110 may perform DCI monitoring in the first and second search spaces. If the terminal device 110 monitors DCI in the first search space, the terminal device 110 may determine that the first DCI is received. Then, the terminal device 110 may determine that the UL transmission is to be performed with the first waveform. If the terminal device 110 monitors DCI in the second search space, the terminal device 110 may determine that the second DCI is received. Then, the terminal device 110 may determine that the UL transmission is to be performed with the second waveform.
  • the network device 120 may configure non-overlapped search spaces to the terminal device 110 for different waveforms.
  • the terminal device 110 may have no ambiguous of which waveform should be determined.
  • overlapped search spaces may be allowed to be configured to the terminal device 110 for different waveforms.
  • the terminal device 110 may determine that the first or second DCI is received based on a predetermined configuration.
  • the predetermined configuration may indicate one of the first waveform and the second waveform, as a predefined or configured default waveform for DCI monitored on the overlapped space.
  • DCI lengths for different waveforms are aligned, and different waveforms are associated with different bit values.
  • a 1 bit field is introduced in DCI to indicate a waveform.
  • the first configuration may comprise a first bit value associated with the first waveform and the second configuration may comprise a second bit value associated with the second waveform.
  • the terminal device 110 may perform DCI monitoring in a CSS and/or USS. If the terminal device 110 monitors DCI with a bit field indicating the first bit value, the terminal device 110 may determine that the first DCI is received. Then, the terminal device 110 may determine that the UL transmission is to be performed with the first waveform. If the terminal device 110 monitors DCI with the bit field indicating the second bit value, the terminal device 110 may determine that the second DCI is received. Then, the terminal device 110 may determine that the UL transmission is to be performed with the second waveform. In this way, a straightforward solution may be provided.
  • the bit field may be a newly introduced field for indication of a waveform.
  • an existing field may be reused as the bit field.
  • a frequency domain resource assignment field may be jointly encoded to indicate a waveform, i.e., dynamic resource assignment (RA) allocation indication may be jointly used to indicate a waveform.
  • RA dynamic resource assignment
  • the first configuration may comprise a first value associated with the first waveform and the second configuration may comprise a second value associated with the second waveform.
  • the first value and second value are used to indicate different waveforms.
  • the terminal device 110 may determine that the first DCI is received. Then, the terminal device 110 may determine that the UL transmission is to be performed with the first waveform. For example, if the first bit is 0, the first bit indicates type 0 RA and the first waveform (for example, an OFDM waveform) . If the first bit is 1, the first bit indicates type 1 RA without further information about a waveform. In this case, a second bit will be used to indicate a waveform.
  • the terminal device 110 may determine that the first DCI is received. Then, the terminal device 110 may determine that the UL transmission is to be performed with the first waveform. If the terminal device 110 monitors DCI with the frequency domain resource assignment field and the frequency domain resource assignment field comprises the first bit indicating type 1 RA and the second bit indicating the second value, the terminal device 110 may determine that the second DCI is received. Then, the terminal device 110 may determine that the UL transmission is to be performed with the second waveform.
  • HARQ process numbers i.e., HARQ process identities (IDs)
  • the first configuration may comprises a first HARQ process number associated with the first waveform and the second configuration comprises a second HARQ process number associated with the second waveform. If the terminal device 110 monitors DCI with the first HARQ process number, the terminal device 110 may determine that the first DCI is received. Then, the terminal device 110 may determine that the UL transmission is to be performed with the first waveform. If the terminal device 110 monitors DCI with the second HARQ process number, the terminal device 110 may determine that the second DCI is received. Then, the terminal device 110 may determine that the UL transmission is to be performed with the second waveform.
  • HARQ process numbers i.e., HARQ process identities (IDs)
  • IDs HARQ process identities
  • DCI lengths for different waveforms are not aligned, and different waveforms are associated with different DCI lengths.
  • the first configuration may comprise a first length of the first DCI and the second configuration comprises a second length of the second DCI.
  • the terminal device 110 may determine that the first DCI is received. Then, the terminal device 110 may determine that the UL transmission is to be performed with the first waveform. If the terminal device 110 monitors DCI with the second length, the terminal device 110 may determine that the second DCI is received. Then, the terminal device 110 may determine that the UL transmission is to be performed with the second waveform.
  • the terminal device 110 may perform the DCI monitoring based on a length obtained by adding the first or second length with one. If the terminal device 110 monitors DCI padded with the third bit value, the terminal device 110 may determine that the first DCI is received.
  • the terminal device 110 may determine that the UL transmission is to be performed with the first waveform. If the terminal device 110 monitors DCI padded with the fourth bit value, the terminal device 110 may determine that the second DCI is received. Then, the terminal device 110 may determine that the UL transmission is to be performed with the second waveform.
  • the terminal device 110 may align at least two of the first length of the first DCI, the second length of the second DCI and a third length of third DCI for a downlink (DL) transmission so that the number of padding bits for the alignment is minimized. Then the terminal device 110 may perform the DCI monitoring based on the aligned first and second lengths. In this way, DCI (e.g., format 0_1A or 0_1B) for the UL transmission may be aligned with DCI (e.g., format 1_1) for a DL transmission by adding padding bits for smaller DCI.
  • DCI e.g., format 0_1A or 0_1B
  • This may be an alignment between format 0_1A and format 0_1B or an alignment between format 1_1 and format 0_1B, depending on which alignment may have smaller padding bits.
  • a complexity of a DCI monitoring may be further reduced.
  • different waveforms are associated with different preamble resources.
  • the first configuration may comprise a first preamble resource associated with the first waveform and the second configuration may comprise a second preamble resource associated with the second waveform. If a preamble transmission is performed via the first preamble resource, the terminal device 110 may determine that the uplink transmission is to be performed with the first waveform. If the preamble transmission is performed via the second preamble resource, the terminal device 110 may determine that the uplink transmission is to be performed with the second waveform.
  • a dedicated physical random access channel (PRACH) preamble resource may be configured for a waveform B different from a waveform A indicated for msg3-transformPrecoder. If the dedicated PRACH preamble resource is used for PRACH transmission by the terminal device 110, the terminal device 110 may use the waveform B for msg3 PUSCH transmission and corresponding retransmission. Otherwise, the terminal device 110 may use the waveform A for msg3 PUSCH transmission and corresponding retransmission.
  • PRACH physical random access channel
  • the terminal device 110 may automatically determine a waveform by UE implementation, and indicate the determined waveform to the network device 120.
  • the network device 120 may determine the waveform by blind detection.
  • different waveforms may be associated with different DMRS group offset values.
  • the terminal device 110 may indicate the determined waveform to the network device 120 via a corresponding DMRS group offset value.
  • the first configuration may comprise a first DMRS group offset value associated with the first waveform and the second configuration comprises a second DMRS group offset value associated with the second waveform. If the terminal device 110 determines that the UL transmission is to be performed with the first waveform, the terminal device 110 may perform the UL transmission based on the first waveform and the first DMRS group offset value. If the terminal device 110 determines that the UL transmission is to be performed with the second waveform, the terminal device 110 may perform the UL transmission based on the second waveform and the second DMRS group offset value.
  • the terminal device 110 may receive an indication that a waveform switching is to be applied after a predetermined time delay. Based on the indication, the terminal device 110 may determine whether the UL transmission is to be performed with the first or second waveform. In other words, the terminal device 110 may switch from the current used waveform to an unused waveform after the predetermined time delay.
  • the indication may be carried by DCI. In some embodiments, the indication may be carried by a medium access control (MAC) control element (CE) .
  • MAC medium access control
  • CE control element
  • the predetermined time delay may be determined based on a timing at which an acknowledgement (ACK) for reception of the indication is transmitted.
  • ACK acknowledgement
  • a MAC CE is used to indicate the waveform switching.
  • the terminal device 110 may start monitoring DCI for a switched waveform from slot n+k, where k is a slot in which the terminal device 110 transmits an ACK for corresponding MAC CE to the network device 120, and n is a predefined value. It should be noted that this is merely an example, and does not limit the present disclosure.
  • embodiments of the present disclosure provide methods of communication implemented at a terminal device and a network device. These methods will be described below with reference to FIGs. 4 to 5.
  • FIG. 4 illustrates an example method 400 of communication implemented at a terminal device in accordance with some embodiments of the present disclosure.
  • the method 400 may be performed at the terminal device 110 as shown in FIG. 1.
  • the method 400 will be described with reference to FIG. 1. It is to be understood that the method 400 may include additional blocks not shown and/or may omit some blocks as shown, and the scope of the present disclosure is not limited in this regard.
  • the terminal device 110 receives, from the network device 120, a first configuration for a first waveform and a second configuration for a second waveform.
  • the terminal device 110 determines, based on the first and second configurations, whether an UL transmission is to be performed with the first or second waveform.
  • the terminal device 110 may perform, based on the first and second configurations, a monitoring on first DCI for the first waveform and second DCI for the second waveform. In some embodiments, the terminal device 110 may align a first length of the first DCI and a second length of the second DCI to be an aligned length; and perform the monitoring based on the aligned length. In some embodiments, the terminal device 110 may pad one of corresponding fields of the first and second DCI having a smaller bit width with zero so that the corresponding fields have the same bit width. In some embodiments, the terminal device 110 may pad one of the first and second DCI having a smaller length with zero so that the first length is equal to the second length.
  • the first configuration may comprise a first length of the first DCI and the second configuration may comprise a second length of the second DCI.
  • the terminal device 110 may align at least two of the first length of the first DCI, the second length of the second DCI and a third length of third DCI for a downlink transmission so that the number of padding bits for the alignment is minimized; and perform the monitoring based on the aligned first and second lengths.
  • the first configuration may comprise a first RNTI associated with the first waveform and the second configuration may comprise a second RNTI associated with the second waveform.
  • the terminal device 110 in response to monitoring DCI with the first RNTI, the terminal device 110 may determine that the first DCI is received. In response to monitoring DCI with the second RNTI, the terminal device 110 may determine that the second DCI is received.
  • the first configuration may comprise a first search space associated with the first waveform and the second configuration may comprise a second search space associated with the second waveform.
  • the terminal device 110 in response to monitoring DCI in the first search space, the terminal device 110 may determine that the first DCI is received. In response to monitoring DCI in the second search space, the terminal device 110 may determine that the second DCI is received. In response to monitoring DCI in an overlapped space between the first and second search spaces, the terminal device 110 may determine that the first DCI or the second DCI is received based on a predetermined configuration.
  • the first configuration may comprise a first bit value associated with the first waveform and the second configuration may comprise a second bit value associated with the second waveform.
  • the terminal device 110 in response to monitoring DCI with a bit field indicating the first bit value, the terminal device 110 may determine that the first DCI is received. In response to monitoring DCI with the bit field indicating the second bit value, the terminal device 110 may determine that the second DCI is received.
  • the first configuration may comprise a first value associated with the first waveform and the second configuration may comprise a second value associated with the second waveform.
  • the terminal device 110 in response to monitoring DCI with a frequency domain resource assignment field comprising a first bit indicating type 0 RA, the terminal device 110 may determine that the first DCI is received. In response to monitoring DCI with the frequency domain resource assignment field comprising the first bit indicating type 1 RA and a second bit indicating the first value, the terminal device 110 may determine that the first DCI is received. In response to monitoring DCI with the frequency domain resource assignment field comprising the first bit indicating type 1 RA and the second bit indicating the second value, the terminal device 110 may determine that the second DCI is received.
  • the first configuration may comprise a first HARQ process number associated with the first waveform and the second configuration may comprise a second HARQ process number associated with the second waveform.
  • the terminal device 110 in response to monitoring DCI with the first HARQ process number, the terminal device 110 may determine that the first DCI is received. In response to monitoring DCI with the second HARQ process number, the terminal device 110 may determine that the second DCI is received.
  • the first configuration may comprise a first length of the first DCI and the second configuration comprises a second length of the second DCI, the second length being different from the first length.
  • the terminal device 110 in response to monitoring DCI with the first length, the terminal device 110 may determine that the first DCI is received. In response to monitoring DCI with the second length, the terminal device 110 may determine that the second DCI is received.
  • the first configuration may comprise a first length and a third bit value associated with the first DCI and the second configuration may comprise a second length and a fourth bit value associated with the second DCI, the second length being equal to the first length.
  • the terminal device 110 may perform the monitoring based on a length obtained by adding the first length with one. In response to monitoring DCI padded with the third bit value, the terminal device 110 may determine that the first DCI is received. In response to monitoring DCI padded with the fourth bit value, the terminal device 110 may determine that the second DCI is received.
  • the terminal device 110 may determine that the UL transmission is to be performed with the first waveform. In response to receiving the second DCI from the network device 120, the terminal device 110 may determine that the UL transmission is to be performed with the second waveform.
  • the terminal device 110 may receive, from the network device 120, an indication that a waveform switching is to be applied after a predetermined time delay, and determine, based on the indication, whether the uplink transmission is to be performed with the first or second waveform.
  • the indication may be carried by at least one of DCI or a MAC CE.
  • the terminal device 110 may determine the predetermined time delay based on a timing at which an acknowledgement for reception of the indication is transmitted.
  • the terminal device 110 may determine that the UL transmission is to be performed with the first waveform, and if the preamble transmission is performed via the second preamble resource, the terminal device 110 may determine that the UL transmission is to be performed with the second waveform.
  • the process proceeds to block 430.
  • the terminal device 110 performs the UL transmission with the first waveform.
  • the terminal device 110 may perform the uplink transmission based on the first waveform and the first DMRS group offset value.
  • the process proceeds to block 440.
  • the terminal device 110 performs the UL transmission with the second waveform.
  • the terminal device 110 may perform the UL transmission based on the second waveform and the second DMRS group offset value.
  • FIG. 5 illustrates an example method 500 of communication implemented at a network device in accordance with some embodiments of the present disclosure.
  • the method 500 may be performed at the network device 120 as shown in FIG. 1.
  • the method 500 will be described with reference to FIG. 1. It is to be understood that the method 500 may include additional blocks not shown and/or may omit some blocks as shown, and the scope of the present disclosure is not limited in this regard.
  • the network device 120 transmits, to the terminal device 110, a first configuration for a first waveform and a second configuration for a second waveform.
  • the network device 120 determines, based on the first and second configurations, whether an UL transmission is to be performed with the first or second waveform.
  • the first configuration comprises a first preamble resource associated with the first waveform and the second configuration comprises a second preamble resource associated with the second waveform. If determining that a preamble transmission is performed via the first preamble resource, the network device 120 may determine that the uplink transmission is to be performed with the first waveform. If determining that the preamble transmission is performed via the second preamble resource, the network device 120 may determine that the uplink transmission is to be performed with the second waveform.
  • the process proceeds to block 530.
  • the network device 120 receives the UL transmission with the first waveform.
  • the process proceeds to block 540.
  • the network device 120 receives the UL transmission with the second waveform.
  • the network device 120 may transmit, to the terminal device 110, first DCI indicating the first waveform. If the UL transmission is to be performed with the second waveform, the network device 120 may transmit, to the terminal device 110, second DCI indicating the second waveform.
  • the network device 120 may align a first length of the first DCI and a second length of the second DCI to be an aligned length, and transmit the first or second DCI based on the aligned length. In some embodiments, the network device 120 may pad one of corresponding fields of the first and second DCI having a smaller bit width with zero so that the corresponding fields have the same bit width. In some embodiments, the network device 120 may pad one of the first and second DCI having a smaller length with zero so that the first length is equal to the second length.
  • the first configuration comprises a first length of the first DCI and the second configuration comprises a second length of the second DCI
  • the network device 120 may align at least two of the first length of the first DCI, the second length of the second DCI and a third length of third DCI for downlink transmission so that the number of padding bits for the alignment is minimized, and transmit the first or second DCI based on the aligned first or second length.
  • the first configuration comprises a first RNTI associated with the first waveform and the second configuration comprises a second RNTI associated with the second waveform. If the UL transmission is to be performed with the first waveform, the network device 120 may transmit the first DCI with the first RNTI. If the UL transmission is to be performed with the second waveform, the network device 120 may transmit the second DCI with the second RNTI.
  • the first configuration comprises a first search space associated with the first waveform and the second configuration comprises a second search space associated with the second waveform. If the UL transmission is to be performed with the first waveform, the network device 120 may transmit the first DCI in the first search space or in an overlapped space between the first and second search spaces. If the UL transmission is to be performed with the second waveform, the network device 120 may transmit the second DCI in the second search space or in the overlapped space between the first and second search spaces.
  • the first configuration comprises a first bit value associated with the first waveform and the second configuration comprises a second value associated with the second waveform. If the UL transmission is to be performed with the first waveform, the network device 120 may transmit the first DCI with a bit field indicating the first bit value. If the UL transmission is to be performed with the second waveform, the network device 120 may transmit the second DCI with the bit field indicating the second bit value.
  • the first configuration comprises a first value associated with the first waveform and the second configuration comprises a second value associated with the second waveform. If the UL transmission is to be performed with the first waveform, the network device 120 may transmit the first DCI with a frequency domain resource assignment field comprising a first bit indicating type 0 RA, or transmit the first DCI with the frequency domain resource assignment field comprising the first bit indicating type 1 RA and a second bit indicating the first value. If the UL transmission is to be performed with the second waveform, the network device 120 may transmit the second DCI with the frequency domain resource assignment field comprising the first bit indicating type 1 RA and the second bit indicating the second value.
  • the first configuration comprises a first HARQ process number associated with the first waveform and the second configuration comprises a second HARQ process number associated with the second waveform. If the UL transmission is to be performed with the first waveform, the network device 120 may transmit the first DCI with the first HARQ process number. If the UL transmission is to be performed with the second waveform, the network device 120 may transmit the second DCI with the second HARQ process number.
  • the first configuration comprises a first length of the first DCI and the second configuration comprises a second length of the second DCI, the second length being different from the first length. If the UL transmission is to be performed with the first waveform, the network device 120 may transmit the first DCI with the first length. If the UL transmission is to be performed with the second waveform, the network device 120 may transmit the second DCI with the second length.
  • the first configuration comprises a first length and a third bit value associated with the first DCI and the second configuration comprises a second length and a fourth bit value associated with the second DCI, the second length being equal to the first length. If the UL transmission is to be performed with the first waveform, the network device 120 may transmit the first DCI padded with the third bit value. If the UL transmission is to be performed with the second waveform, the network device 120 may transmit the second DCI padded with the fourth bit value.
  • the first configuration comprises a first DMRS group offset value associated with the first waveform and the second configuration comprises a second DMRS group offset value associated with the second waveform.
  • the network device 120 may receive the UL transmission based on the first waveform and the first DMRS group offset value, or receive the UL transmission based on the second waveform and the second DMRS group offset value.
  • the network device 120 may transmit, to the terminal device 110, an indication that a waveform switching is to be applied after a predetermined time delay.
  • the indication may be carried by at least one of DCI or a MAC CE.
  • the predetermined time delay is determined based on a timing at which an acknowledgement for reception of the indication is transmitted.
  • FIG. 6 is a simplified block diagram of a device 600 that is suitable for implementing embodiments of the present disclosure.
  • the device 600 can be considered as a further example implementation of the terminal device 110 or the network device 120 as shown in FIG. 1. Accordingly, the device 600 can be implemented at or as at least a part of the terminal device 110 or the network device 120.
  • the device 600 includes a processor 610, a memory 620 coupled to the processor 610, a suitable transmitter (TX) and receiver (RX) 640 coupled to the processor 610, and a communication interface coupled to the TX/RX 640.
  • the memory 610 stores at least a part of a program 630.
  • the TX/RX 640 is for bidirectional communications.
  • the TX/RX 640 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones.
  • the communication interface may represent any interface that is necessary for communication with other network elements, such as X2/Xn interface for bidirectional communications between eNBs/gNBs, S1/NG interface for communication between a Mobility Management Entity (MME) /Access and Mobility Management Function (AMF) /SGW/UPF and the eNB/gNB, Un interface for communication between the eNB/gNB and a relay node (RN) , or Uu interface for communication between the eNB/gNB and a terminal device.
  • MME Mobility Management Entity
  • AMF Access and Mobility Management Function
  • RN relay node
  • Uu interface for communication between the eNB/gNB and a terminal device.
  • the program 630 is assumed to include program instructions that, when executed by the associated processor 610, enable the device 600 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGs. 1 to 5.
  • the embodiments herein may be implemented by computer software executable by the processor 610 of the device 600, or by hardware, or by a combination of software and hardware.
  • the processor 610 may be configured to implement various embodiments of the present disclosure.
  • a combination of the processor 610 and memory 620 may form processing means 650 adapted to implement various embodiments of the present disclosure.
  • the memory 620 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 620 is shown in the device 600, there may be several physically distinct memory modules in the device 600.
  • the processor 610 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 600 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.
  • a terminal device comprises circuitry configured to: receive, from a network device, a first configuration for a first waveform and a second configuration for a second waveform; determine, based on the first and second configurations, whether an uplink transmission is to be performed with the first or second waveform; in accordance with a determination that the uplink transmission is to be performed with the first waveform, perform the uplink transmission with the first waveform; and in accordance with a determination that the uplink transmission is to be performed with the second waveform, perform the uplink transmission with the second waveform.
  • the circuity may be configured to determine whether the uplink transmission is to be performed with the first or second waveform by: performing, based on the first and second configurations, a monitoring on first DCI for the first waveform and second DCI for the second waveform; in response to receiving the first DCI from the network device, determining that the uplink transmission is to be performed with the first waveform; and in response to receiving the second DCI from the network device, determining that the uplink transmission is to be performed with the second waveform.
  • the circuity may be configured to perform the monitoring by:aligning a first length of the first DCI and a second length of the second DCI to be an aligned length; and performing the monitoring based on the aligned length.
  • the circuity may be configured to perform the monitoring by: in response to monitoring DCI with the first RNTI, determining that the first DCI is received; and in response to monitoring DCI with the second RNTI, determining that the second DCI is received.
  • the circuity may be configured to perform the monitoring by: in response to monitoring DCI in the first search space, determining that the first DCI is received; in response to monitoring DCI in the second search space, determining that the second DCI is received; and in response to monitoring DCI in an overlapped space between the first and second search spaces, determining that the first DCI or the second DCI is received based on a predetermined configuration.
  • the circuity may be configured to perform the monitoring by: in response to monitoring DCI with a bit field indicating the first bit value, determining that the first DCI is received; and in response to monitoring DCI with the bit field indicating the second bit value, determining that the second DCI is received.
  • the circuity may be configured to perform the monitoring by: in response to monitoring DCI with a frequency domain resource assignment field comprising a first bit indicating type 0 RA, determining that the first DCI is received; in response to monitoring DCI with the frequency domain resource assignment field comprising the first bit indicating type 1 RA and a second bit indicating the first value, determining that the first DCI is received; and in response to monitoring DCI with the frequency domain resource assignment field comprising the first bit indicating type 1 RA and the second bit indicating the second value, determining that the second DCI is received.
  • the circuity may be configured to perform the monitoring by: in response to monitoring DCI with the first HARQ process number, determining that the first DCI is received; and in response to monitoring DCI with the second HARQ process number, determining that the second DCI is received.
  • the circuitry may be configured to align the first and second lengths by: padding one of corresponding fields of the first and second DCI having a smaller bit width with zero so that the corresponding fields have the same bit width; or padding one of the first and second DCI having a smaller length with zero so that the first length is equal to the second length.
  • the circuitry may be configured to perform the monitoring by: in response to monitoring DCI with the first length, determining that the first DCI is received; and in response to monitoring DCI with the second length, determining that the second DCI is received.
  • the circuitry may be configured to perform the monitoring by: performing the monitoring based on a length obtained by adding the first length with one; in response to monitoring DCI padded with the third bit value, determining that the first DCI is received; and in response to monitoring DCI padded with the fourth bit value, determining that the second DCI is received.
  • the circuitry may be configured to perform the monitoring by: aligning at least two of the first length of the first DCI, the second length of the second DCI and a third length of third DCI for a downlink transmission so that the number of padding bits for the alignment is minimized; and performing the monitoring based on the aligned first and second lengths.
  • the circuitry may be configured to determine whether the uplink transmission is to be performed with the first or second waveform by: in accordance with a determination that a preamble transmission is performed via the first preamble resource, determining that the uplink transmission is to be performed with the first waveform; and in accordance with a determination that the preamble transmission is performed via the second preamble resource, determining that the uplink transmission is to be performed with the second waveform.
  • the circuitry may be configured to perform the uplink transmission with the first waveform by performing the uplink transmission based on the first waveform and the first DMRS group offset value, and to perform the uplink transmission with the second waveform by performing the uplink transmission based on the second waveform and the second DMRS group offset value.
  • the circuitry may be configured to determine whether the uplink transmission is to be performed with the first or second waveform by: receiving, from the network device, an indication that a waveform switching is to be applied after a predetermined time delay; and determining, based on the indication, whether the uplink transmission is to be performed with the first or second waveform.
  • the indication may be carried by at least one of DCI or a MAC CE.
  • the circuitry may be further configured to determine the predetermined time delay based on a timing at which an acknowledgement for reception of the indication is transmitted.
  • a network device comprises a circuitry configured to: transmit, to a terminal device, a first configuration for a first waveform and a second configuration for a second waveform; determine, based on the first and second configurations, whether an uplink transmission is to be performed with the first or second waveform; in accordance with a determination that the uplink transmission is to be performed with the first waveform, receive the uplink transmission with the first waveform; and in accordance with a determination that the uplink transmission is to be performed with the second waveform, receive the uplink transmission with the second waveform.
  • the circuitry may be further configured to: in accordance with a determination that the uplink transmission is to be performed with the first waveform, transmitting, to the terminal device, first DCI indicating the first waveform; and in accordance with a determination that the uplink transmission is to be performed with the second waveform, transmitting, to the terminal device, second DCI indicating the second waveform.
  • the circuitry may be configured to transmit the first or second DCI by: aligning a first length of the first DCI and a second length of the second DCI to be an aligned length; and transmitting the first or second DCI based on the aligned length.
  • the circuitry may be configured to transmit the first DCI by transmitting the first DCI with the first RNTI; and to transmit the second DCI by transmitting the second DCI with the second RNTI.
  • the circuitry may be configured to transmit the first DCI by transmitting the first DCI in the first search space or in an overlapped space between the first and second search spaces; and transmit the second DCI by transmitting the second DCI in the second search space or in the overlapped space between the first and second search spaces.
  • the circuitry may be configured to transmit the first DCI by transmitting the first DCI with a bit field indicating the first bit value; and to transmit the second DCI by transmitting the second DCI with the bit field indicating the second bit value.
  • the circuitry may be configured to transmit the first DCI by transmitting the first DCI with a frequency domain resource assignment field comprising a first bit indicating type 0 RA or transmitting the first DCI with the frequency domain resource assignment field comprising the first bit indicating type 1 RA and a second bit indicating the first value; and to transmit the second DCI by transmitting the second DCI with the frequency domain resource assignment field comprising the first bit indicating type 1 RA and the second bit indicating the second value.
  • the circuitry may be configured to transmit the first DCI by transmitting the first DCI with the first HARQ process number; and to transmit the second DCI by transmitting the second DCI with the second HARQ process number.
  • the circuitry may be configured to align the first and second lengths by: padding one of corresponding fields of the first and second DCI having a smaller bit width with zero so that the corresponding fields have the same bit width; or padding one of the first and second DCI having a smaller length with zero so that the first length is equal to the second length.
  • the circuitry may be configured to transmit the first DCI by transmitting the first DCI with the first length; and to transmit the second DCI by transmitting the second DCI with the second length.
  • the circuitry may be configured to transmit the first DCI by transmitting the first DCI padded with the third bit value; and to transmit the second DCI by transmitting the second DCI padded with the fourth bit value.
  • the circuitry may be configured to transmit the first or second DCI by: aligning at least two of the first length of the first DCI, the second length of the second DCI and a third length of third DCI for downlink transmission so that the number of padding bits for the alignment is minimized; and transmitting the first or second DCI based on the aligned first or second length.
  • the circuitry may be configured to determine whether the uplink transmission is to be performed with the first or second waveform by: in accordance with a determination that a preamble transmission is performed via the first preamble resource, determining that the uplink transmission is to be performed with the first waveform; and in accordance with a determination that the preamble transmission is performed via the second preamble resource, determining that the uplink transmission is to be performed with the second waveform.
  • the circuitry may be configured to receive the uplink transmission with the first waveform by receiving the uplink transmission based on the first waveform and the first DMRS group offset value; and receive the uplink transmission with the second waveform by receiving the uplink transmission based on the second waveform and the second DMRS group offset value.
  • the circuitry may be further configured to transmit, to the terminal device, an indication that a waveform switching is to be applied after a predetermined time delay.
  • the indication may be carried by at least one of DCI or a MAC CE.
  • the predetermined time delay is determined based on a timing at which an acknowledgement for reception of the indication is transmitted.
  • circuitry used herein may refer to hardware circuits and/or combinations of hardware circuits and software.
  • the circuitry may be a combination of analog and/or digital hardware circuits with software/firmware.
  • the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions.
  • the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software/firmware for operation, but the software may not be present when it is not needed for operation.
  • the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and/or firmware.
  • 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 FIGs. 1 to 5.
  • 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.

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Abstract

Selon des modes de réalisation, la présente divulgation concerne des procédés, des dispositifs et des supports lisibles par ordinateur pour la communication. Un dispositif terminal reçoit, en provenance d'un dispositif de réseau, une première configuration pour une première forme d'onde et une seconde configuration pour une seconde forme d'onde, et détermine, sur la base des première et seconde configurations, si une transmission de liaison montante doit être effectuée avec la première ou la seconde forme d'onde. S'il est déterminé que la transmission en liaison montante doit être effectuée avec la première forme d'onde, le dispositif terminal effectue la transmission en liaison montante avec la première forme d'onde. S'il est déterminé que la transmission en liaison montante doit être effectuée avec la seconde forme d'onde, le dispositif terminal effectue la transmission en liaison montante avec la seconde forme d'onde. De cette manière, une commutation de forme d'onde dynamique est obtenue.
PCT/CN2022/072101 2022-01-14 2022-01-14 Procédé, dispositif et support de stockage informatique de communication WO2023133829A1 (fr)

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