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WO2025231915A1 - Procédés et dispositifs d'amélioration de transmission de liaison montante - Google Patents

Procédés et dispositifs d'amélioration de transmission de liaison montante

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Publication number
WO2025231915A1
WO2025231915A1 PCT/CN2024/092496 CN2024092496W WO2025231915A1 WO 2025231915 A1 WO2025231915 A1 WO 2025231915A1 CN 2024092496 W CN2024092496 W CN 2024092496W WO 2025231915 A1 WO2025231915 A1 WO 2025231915A1
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WIPO (PCT)
Prior art keywords
dmrs
symbols
occ
symbol
code word
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
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PCT/CN2024/092496
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English (en)
Inventor
Yue Zhou
Gang Wang
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NEC Corp
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NEC Corp
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Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to PCT/CN2024/092496 priority Critical patent/WO2025231915A1/fr
Publication of WO2025231915A1 publication Critical patent/WO2025231915A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0016—Time-frequency-code
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • 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—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • Example embodiments of the present disclosure generally relate to the field of communication techniques and in particular, to devices and methods for devices and methods for non-terrestrial network (NTN) Narrowband Physical Uplink Shared Channel (NPUSCH) enhancement.
  • NTN non-terrestrial network
  • NPUSCH Physical Uplink Shared Channel
  • a non-terrestrial network refers to a network or segment of networks using radio frequency (RF) resources on board a satellite or unmanned aircraft system (UAS) platform.
  • RF radio frequency
  • UAS unmanned aircraft system
  • the NTN could provide ubiquitous and resilient wireless service beyond the terrestrial network coverage.
  • 3GPP 3rd Generation Partnership Project
  • 5G fifth generation
  • 6G sixth generation
  • NTN a relatively large number of terminal devices are served in a cell.
  • the NTN needs to enhance/improve the uplink capacity.
  • a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, configuration information of orthogonal cover code (OCC) , the configuration information comprising an OCC index and an OCC length; determine a demodulation reference signal (DMRS) pattern for a Narrowband Physical Uplink Shared Channel (NPUSCH) transmission based on the configuration information; and transmit, to the network device, the NPUSCH transmission based on the DMRS pattern and the configuration information.
  • OCC orthogonal cover code
  • DMRS demodulation reference signal
  • NPUSCH Narrowband Physical Uplink Shared Channel
  • a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, configuration information of orthogonal cover code (OCC) , the configuration information comprising an OCC index and an OCC length; and receive, from the terminal device, a Narrowband Physical Uplink Shared Channel (NPUSCH) transmission with a demodulation reference signal (DMRS) pattern based on the configuration information.
  • OCC orthogonal cover code
  • NPUSCH Narrowband Physical Uplink Shared Channel
  • DMRS demodulation reference signal
  • a communication method performed by a terminal device.
  • the method comprises: receiving, from a network device, configuration information of orthogonal cover code (OCC) , the configuration information comprising an OCC index and an OCC length; determining a demodulation reference signal (DMRS) pattern for a Narrowband Physical Uplink Shared Channel (NPUSCH) transmission based on the configuration information; and transmitting, to the network device, the NPUSCH transmission based on the DMRS pattern and the configuration information.
  • OCC orthogonal cover code
  • DMRS demodulation reference signal
  • NPUSCH Narrowband Physical Uplink Shared Channel
  • a communication method performed by a network device.
  • the method comprises: transmitting, to a terminal device, configuration information of orthogonal cover code (OCC) , the configuration information comprising an OCC index and an OCC length; and receiving, from the terminal device, a Narrowband Physical Uplink Shared Channel (NPUSCH) transmission with a demodulation reference signal (DMRS) pattern based on the configuration information.
  • OCC orthogonal cover code
  • NPUSCH Narrowband Physical Uplink Shared Channel
  • DMRS demodulation reference signal
  • a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to carry out the method according to the third, or fourth aspect.
  • FIG. 1 illustrates an example communication environment in which example embodiments of the present disclosure can be implemented
  • FIG. 2A and FIG. 2B illustrate schematic diagrams of non-terrestrial network scenarios with different payload types in accordance with some embodiments of the present disclosure, respectively;
  • FIG. 3 illustrates different schemes for applying orthogonal codes
  • FIG. 4 illustrates a schematic diagram of one uplink slot
  • FIG. 5 illustrates a schematic diagram of an example of NPUSCH transmission with DMRS
  • FIG. 6 illustrates schematic diagrams of an example of NPUSCH transmission with DMRS
  • FIG. 7 illustrates a signaling flow of a NPUSCH transmission associated with a DRMS pattern in accordance with some embodiments of the present disclosure
  • FIG. 8 illustrates a schematic diagram of an example of NPUSCH transmission in accordance with some embodiments of the present disclosure
  • FIG. 9 illustrates a schematic diagram of an example of NPUSCH transmission in accordance with some embodiments of the present disclosure.
  • FIG. 10 illustrates a schematic diagram of an example of NPUSCH transmission in accordance with some embodiments of the present disclosure
  • FIG. 11 illustrates a schematic diagram of an example of NPUSCH transmission in accordance with some embodiments of the present disclosure
  • FIG. 12 illustrates a schematic diagram of an example of NPUSCH transmission in accordance with some embodiments of the present disclosure
  • FIG. 13 illustrates a schematic diagram of an example of NPUSCH transmission in accordance with some embodiments of the present disclosure
  • FIG. 14 illustrates a schematic diagram of an example of NPUSCH transmission in accordance with some embodiments of the present disclosure
  • FIG. 15 illustrates a schematic diagram of an example of NPUSCH transmission in accordance with some embodiments of the present disclosure
  • FIG. 16 illustrates a schematic diagram of DMRS symbols in slot groups in accordance with some embodiments of the present disclosure
  • FIG. 17 illustrates a flowchart of a communication method implemented at a terminal device according to some example embodiments of the present disclosure
  • FIG. 18 illustrates a flowchart of a communication method implemented at a network device according to some example embodiments of the present disclosure.
  • FIG. 19 illustrates a simplified block diagram of an apparatus that is suitable for implementing example 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, devices 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 incorporate 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 (e.g., 450 MHz to 6000 MHz) , FR2 (e.g., 24.25GHz to 52.6GHz) , frequency band larger than 100 GHz as well as Tera Hertz (THz) . It can further work on licensed/unlicensed/shared spectrum.
  • FR1 e.g., 450 MHz to 6000 MHz
  • FR2 e.g., 24.25GHz to 52.6GHz
  • THz Tera Hertz
  • the terminal device may have more than one connection 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.
  • the embodiments of the present disclosure may be performed in 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’ are 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.
  • the term “resource, ” “transmission resource, ” “uplink resource, ” or “downlink resource” may refer to any resource for performing a communication, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, or any other resource enabling a communication, and the like.
  • a resource in both frequency domain and time domain will be used as an example of a transmission resource for describing some example embodiments of the present disclosure. It is noted that example embodiments of the present disclosure are equally applicable to other resources in other domains.
  • FIG. 1 illustrates a schematic diagram of an example communication environment 100 in which example embodiments of the present disclosure can be implemented.
  • a network device 120 may a plurality of terminal devices 110-1, 110-2 and 110-3, which are collectively referred to as terminal devices 110 or individually referred to as a terminal device 110.
  • the terminal device 110 may be an UE and the network device 120 may be a base station serving the UE.
  • the communication environment 100 may include any suitable number of devices configured to implement example embodiments of the present disclosure. Although not shown, it would be appreciated that one or more additional devices may be deployed in the communication environment 100.
  • the communication between the terminal device 110 and the network device 120 may operate in a narrowband (NB) , for example in the case of NB IoT.
  • NB narrowband
  • a random access procedure may be performed over a NPRACH.
  • terminal device 110 operating as a UE
  • network device 120 operating as a gNB
  • operations described in connection with a terminal device may be implemented at a network device or other device
  • operations described in connection with a network device may be implemented at a terminal device or other devices.
  • a link from the network device 120 to the terminal device 110 is referred to as a downlink (DL)
  • a link from the terminal device 110 to the network device 120 is referred to as an uplink (UL)
  • the network device 120 is a transmitting (TX) device (or a transmitter) and the terminal device 110 is a receiving (RX) device (or a receiver)
  • the terminal device 110 is a TX device (or a transmitter) and the network device 120 is a RX device (or a receiver) .
  • the terminal device 110 may perform uplink transmission with the network device 120, for example PUSCH transmission.
  • DMRS bundling may be needed for transmission occasions of the uplink transmission.
  • the communications in the communication environment 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 communication environment 100 may be implemented in the NTN.
  • the NTN may have different payload types.
  • FIG. 2A and FIG. 2B illustrate schematic diagrams of NTN scenarios with different payload types.
  • the NTN of FIG. 2A is based on a transparent payload
  • the NTN of FIG. 2B is based on a regenerative payload.
  • a satellite or UAS platform may implement either a transparent or a regenerative (with onboard processing) payload.
  • the satellite or UAS platform may generate beams (for example, typically generate several beams) over a given service area bounded by its field of view 260.
  • the footprints 250 of the beams are typically of an elliptic shape.
  • the field of view of a satellite or UAS platform depends on the on-board antenna diagram and the minimum elevation angle. Table 1 shows some parameters for some example platforms.
  • a UE 210 may communicate with the satellite 220 or UAS platform through a service link, and the satellite 220 or UAS platform may communicate with a gateway 230 having connection with a data network 240 through a feeder link.
  • the satellite 220 or UAS platform may perform RF filtering, frequency conversion and amplification, therefore a waveform signal repeated by the payload may be unchanged.
  • the UE 210 may have a connection with the data network 240.
  • the round-trip time (RTT) in this case reflects the time for data to transmit from the UE 210 through the satellite 220 or UAS platform to a gNB (which is on the ground) .
  • the UE 210 may communicate with a satellite 220-1 or UAS platform through a service link.
  • the satellite 220-1 or UAS platform may communicate with a satellite 220-2 or UAS platform through Inter-Switch Link (ISL) , and the satellite 220-2 or UAS platform may communicate with the gateway 230 having a connection with the data network 240 through a feeder link. If ISL is not available, the satellite 220 or UAS platform may communicate with the gateway 230 having a connection with a data network 240 through a feeder link.
  • ISL Inter-Switch Link
  • the satellite 220-1 and 220-2 may perform RF filtering, frequency conversion and amplification, demodulation/decoding, switch and/or routing, and coding/modulation which is effectively equivalent to having all or part of base station (for example, gNB) functions on the satellite or UAS platform.
  • the UE 210 may have a connection with the data network 240.
  • the RTT in this case reflects the time for data to transmit from the UE 210 to the gNB (which is on the satellite or UAS platform) .
  • the Orthogonal Cover Code is a coding technique used in wireless communication systems to mitigate interference and improve overall system performance. OCC is particularly effective in scenarios where multiple UEs or devices are transmitting simultaneously, such as in cellular networks or wireless local area networks (WLANs) . Thus, OCC is a Code Domain Multiplexing (CDM) technique. In OCC, there may be two types of basic operations: spreading of the modulation symbols and multiplexing of the orthogonal codes.
  • orthogonal codes refer to sets of binary sequences that have desirable properties. These codes have the property that their inner product is zero, except when two identical sequences are multiplied together, in which case the inner product is equal to the length of the sequence.
  • FIG. 3 illustrates different schemes for applying orthogonal codes.
  • a scheme in which the OCC is applied in time domain (TD) is referred to as TD-CDM.
  • a scheme in which the OCC is applied in frequency domain (FD) is referred to as FD-CDM, for example, the pattern shown as “FD-CDM2” in FIG. 3.
  • a scheme in which the OCC is applied in both TD and FD is referred to as FD-TD-CDM, for example the pattern shown as “FD2-TD2-CDM4” in FIG. 3 and the pattern shown as “FD2-TD4-CDM8” in FIG. 3.
  • OCC may be used for a Physical Uplink Control Channel (PUCCH) and multi-carrier demodulation reference signal (DM-RS) multiplexing to provide additional DM-RS ports.
  • PUCCH Physical Uplink Control Channel
  • DM-RS multi-carrier demodulation reference signal
  • the waveform may be Single-carrier Frequency-Division Multiple Access (SC FDMA) , which benefits the Peak to Average Power Ratio (PAPR) and results in good coverage.
  • SC FDMA Single-carrier Frequency-Division Multiple Access
  • the narrowband physical random-access channel (NPRACH) may be of single tone with a subcarrier spacing (SCS) of 3.75 kHz and a Cyclic Prefix (CP) of 66.7 us or 266.7us.
  • SCS subcarrier spacing
  • CP Cyclic Prefix
  • the NPUSCH transmission comprises scrambling, modulation, layer mapping, transform precoding, precoding, and mapping to physical resource.
  • the NPUSCH may be single tone with a sub-carrier space (SCS) of 15kHz.
  • SCS sub-carrier space
  • the SCS there may be 20 slots per frame and 12 subcarriers per PRB.
  • the slot duration may be 15360 Ts or 0.5 ms.
  • the NPUSCH may be single tone with a sub-carrier space (SCS) of 3.75kHz.
  • SCS sub-carrier space
  • the slot duration may be 61440 Ts or 2 ms.
  • FIG. 4 illustrates a schematic diagram of one uplink slot 401.
  • the number of symbols for UL represents the number of SC-FDMA symbols of the slot 401.
  • Resource units are used to describe the mapping of the NPUSCH to resource elements (such as the resource element 402) , defined as SC-FDMA symbols in the time domain and consecutive subcarriers in the frequency domain.
  • Table 2 shows some values of parameters, such as the number of subcarriers in a resource unit the number of slots for a UL resource unit the number of symbols for a UL slot, for NPUSCH format 1 and NPUSCH format 2 with different subcarrier spacings, e.g, 3.75kHz or 15kHz.
  • the NPUSCH format 1 may be used to carry the UL-SCH.
  • the DMRS sequence is defined by
  • c (n) is a persudo-random sequence, which is for example sequence defined in TS 36.211 clause 7.2
  • w (n) is given by the following Table 4, where for NPUSCH format 1 if group hopping is not enabled.
  • sequence-group hopping can be enabled where the sequence-group number u in slot n s of a radio frame n f may be defined by a group hopping pattern f gh (n’) and a sequence-shift pattern f ss according to
  • Sequence-group hopping can be enabled or disabled by means of the cell-specific parameter groupHoppingEnabled provided by higher layers. Sequence-group hopping can be enabled or disabled by means of the cell-specific parameter groupHoppingEnabled provided by higher layers. Sequence-group hopping for NPUSCH can be disabled for a certain UE through the higher-layer parameter groupHoppingDisabled despite being enabled on a cell basis unless the NPUSCH transmission corresponds to a Random Access Response Grant or a retransmission of the same transport block as part of the contention based random access procedure.
  • the group-hopping pattern f gh (n′) is given by
  • n′ n s for When for frame structure type 1, n’ is the slot number n s of the first slot of the resource unit.
  • the pseudo-random sequence generator shall be initialized with at the beginning of the resource unit for and in every even slot for
  • sequence-shift pattern f ss is given by
  • Table 4 shows the reference signal sequence for NPUSCH format.
  • the reference signal sequence for NPUSCH format 1 is given by:
  • UL segmented transmission is supported for UL transmission with repetitions.
  • the UE shall apply UE pre-compensation per segment of UL transmission of PUSCH/PUCCH/PRACH for BL UEs or UEs in enhanced coverage and PUSCH/NPRACH for NB-IoT UEs from one segment to the next segment.
  • FIG. 5 illustrates schematic diagrams of NPUSCH transmission.
  • FIG. 5 illustrates schematic diagrams of NPUSCH transmission.
  • FIG. 5 illustrates schematic diagrams of NPUSCH transmission.
  • FIG. 5 illustrates schematic diagrams of NPUSCH transmission.
  • FIG. 6 illustrated schematic diagrams of NPUSCH transmission with DMRS after multiplexing the NPUSCH transmission as shown in FIG. 5.
  • a maximum distance between two DMRS symbols for a certain SCS e.g., 3.75 KHz or 15 KHz
  • the max distance between two consecutive DMRS symbols (for example, the distance between DMRS symbol 611 and DMRS symbol 621) needs to meet the CFO estimation requirement of the corresponding standard.
  • embodiments of the present disclosure propose solutions for NTN NPUSCH enhancement.
  • a codeword set may include 2 codewords, 4 codewords, or other suitable number of codewords.
  • Table 6 shows an example of 4 codeword sets, each codeword set including 4 codewords.
  • n 0, 1, 2 or 3
  • w n indicate the n th codeword set.
  • Table 7 shows another example of 4 codeword sets, each codeword set including 4 codewords.
  • n 0, 1, 2 or 3
  • w n indicate the n th codeword set.
  • codeword sets illustrated in Tables 2 to 4 are applicable to embodiments of the present disclosure. Some of them may be discussed for example, rather than suggesting any limitation. Other suitable codeword set (s) are also applicable.
  • FIG. 7 illustrates a signaling flow 700 of a NPUSCH transmission in accordance with some embodiments of the present disclosure.
  • the signaling flow 700 will be discussed with reference to FIG. 1, for example, by using the terminal device 110 and the network device 120. It is to be understood that although one terminal device 110 is illustrated in FIG. 7, the signal flow 700 may involve a plurality of terminal devices.
  • the network device 120 transmits (705) , to a terminal device 110, configuration information of orthogonal cover code (OCC) .
  • the configuration information comprises an OCC index and an OCC length.
  • the terminal device 110 receives (710) the configuration information and determines (720) a demodulation reference signal (DMRS) pattern for a Narrowband Physical Uplink Shared Channel (NPUSCH) transmission based on the configuration information.
  • DMRS demodulation reference signal
  • NPUSCH Narrowband Physical Uplink Shared Channel
  • the network device 120 transmits (735) the NPUSCH transmission with the DMRS pattern based on the configuration information.
  • the configuration information of OCC may be indicated by the network device 120 for NPUSCH and Narrowband DMRS.
  • the terminal device 110 may reuse the configuration for the NPUSCH.
  • the terminal device 110 may multiplex the NPUSCH follows the indicated OCC configuration.
  • the terminal device 110 may multiplex and insert the DMRS symbols following the OCC configuration for DMRS.
  • the network device 120 may despread and detect the overlapped DMRS and NPRACH signal from multi-terminals, and transmit the response if successfully detected the terminal device 110.
  • the DMRS pattern may be applied after multiplexing OCC with each specific OCC configuration for NPUSCH transmission.
  • the network device 120 may indicate the OCC configuration for NPUSCH transmission.
  • the terminal device 110 may determine the NPUSCH transmission by multiplexing an initial NPUSCH transmission based on the configuration information, and determine a first set of DMRS symbols in compliance with the DMRS pattern based on the configuration information. Then, the terminal device 110 may transmit, to the network device, the NPUSCH transmission together with the first set of DMRS symbols.
  • the terminal device 110 may multiplex the NPUSCH follows the indicated OCC configuration. And the terminal device 110 may multiplex and insert the DMRS symbols following the predefined pattern that corresponds to the OCC configuration for PUSCH.
  • the DMRS pattern may indicate positions of the first set of DMRS symbols.
  • a gap between two consecutive DMRS symbols in the first set of DMRS symbols may include a first number of symbols.
  • the first number may be equal to an integral multiple of the OCC length. Additionally the first number may be less than a threshold number determined based on subcarrier spacing associated with the NPUSCH transmission.
  • the frequency error is a uniform random selection from [-0.1 ppm, +0.1 ppm] for all UEs, and the carrier frequency is 2 GHz.
  • the maximum frequency error is 400 Hz.
  • the maximum phase rotation between two DMRS symbols should be smaller than 2 ⁇ .
  • the gap between two DMRS symbols should be smaller than 2.5 ms, which is 8.75 symbols for SCS 3.75 KHz and 35 symbols for 15 KHz.
  • CFO carrier frequency offset
  • the threshold number may be 8 for SCS 3.75 KHz and 35 symbols for 15 KHz. It is to be understood that the above examples of the threshold number are discussed for illustration rather than suggesting any limitations. In further embodiments of the present disclosure, the threshold number may be other suitable value.
  • the first set of DMRS symbols may be determined by:
  • RU resource unit
  • N RU represents the number of RUs for the NPUSCH transmission
  • w represents a sequence associated with group hopping
  • c represents a persudo-random sequence
  • OccLength represents the OCC length
  • the first set of DMRS symbols are in one or more slot groups, each slot group comprising a plurality of slots.
  • DMRS symbols in the same slot group may be multiplexed with the OCC code words in an OCC code word set corresponding to the OCC index, and DMRS symbols in different slot groups may be multiplexed with OCC code words in different OCC code word sets.
  • the first set of DMRS symbols may be determined by:
  • RU resource unit
  • N RU represents the number of Rus for the NPUSCH transmission
  • w represents a sequence associated with group hopping
  • c represents a persudo-random sequence
  • OccLength represents the OCC length
  • OCCslotgroup represents the number of slots in a slot group applying the same OCC code word set with a specific OCC-index.
  • the NPUSCH transmission and a second set of DMRS symbols indicated by the DMRS pattern may be multiplexed together based on the configuration information.
  • the DMRS pattern may be applied before multiplexing OCC with each specific OCC configuration for NPUSCH transmission.
  • the network device 120 may indicate the OCC configuration for NPUSCH transmission.
  • the terminal device 110 may insert the DMRS symbols as the indicated pattern corresponds to the OCC configuration.
  • a first gap between two consecutive DMRS symbols in the second set of DMRS symbols may include a second number of symbols, and a second gap between another two consecutive DMRS symbols in the second set of DMRS symbols comprises a third number of symbols.
  • both the first gap and the second gap are gaps before multiplexing.
  • the second number is 2, the third number is 10.In another example, the second number is 3, the third number is 9. In another example, the second number is 4, the third number is 8. More details will be further discussed with reference to FIGS. 14-15.
  • FIG. 8 illustrates a schematic diagram of a NPUSCH transmission 800 in accordance with some embodiments of the present disclosure.
  • a DMRS symbol in an even slot may be the fifth symbol multiplexed with a first code word of an OCC code word set corresponding to the OCC index
  • a DMRS symbol in an odd slot may be the first symbol multiplexed with the second code word of the same OCC code word set.
  • a first gap between two consecutive DMRS symbols may be 2 symbols
  • a second gap between another two consecutive DMRS symbols may be 10 symbols.
  • a DMRS symbol at the beginning of the first gap may be multiplexed with a first code word of an OCC code word set
  • a DMRS symbol at the end of the first gap multiplexed with the second code word of the same OCC code word set may be the fifth symbol multiplexed with a first code word of an OCC code word set corresponding to the OCC index
  • a DMRS symbol in an odd slot may be the first symbol multiplexed with the second code word of the same OCC code word set.
  • the DMRS symbol is the 5 th symbol (symbol 4) 811 and may be multiplexed with the 1 st code word of an OCC code word set.
  • the DMRS symbol is the 1 st symbol (symbol 0) 821 and may be multiplexed with the 2 nd code word of the same code word set.
  • a first gap between two consecutive DMRS symbols (for example, DMRS symbol 811 and DMRS symbol 821) is 2 symbols
  • a second gap between another two consecutive DMRS (for example, DMRS symbol 821 and DMRS symbol 831) symbols is 10 symbols.
  • a DMRS symbol at the beginning of the first gap (for example, DMRS symbol 811) may be multiplexed with a first code word of the OCC code word set
  • a DMRS symbol at the end of the first gap (for example, DMRS symbol 821) may be multiplexed with the second code word of the OCC code word set.
  • a DMRS symbol at the end of the second gap may be multiplexed with a code word of a further OCC code word set different than the OCC code word set of which the code word is used in multiplexing the DMRS at the beginning of the second gap (for example, the DMRS symbol 821) .
  • the DMRS symbol 821 is multiplexed with a code word in a first OCC code word set
  • the DMRS symbol 831 may be multiplexed with a code word in a second OCC code word set different from the first OCC code word set.
  • FIG. 9 illustrates a schematic diagram of NPUSCH transmission 900 in accordance with some embodiments of the present disclosure.
  • the DMRS symbol is the 5 th symbol (symbol 4) 911 multiplexed with the 1 st code word of an OCC code word set.
  • the DMRS symbol is the 3 rd symbol (symbol 2) 921 multiplexed with the 2 nd code word of the same OCC code word set.
  • a DMRS symbol in an even slot may be the fifth symbol multiplexed with a first code word of an OCC code word set corresponding to the OCC index
  • a DMRS symbol in an odd slot may be the third symbol multiplexed with the second code word of the OCC code word set.
  • a first gap between two consecutive DMRS symbols may be 4 symbols
  • a second gap between another two consecutive DMRS symbols may be 8 symbols.
  • a DMRS symbol at the beginning of the first gap may be multiplexed with a first code word of the OCC code word set
  • a DMRS symbol at the end of the first gap multiplexed with the second code word of the OCC code word set may be the fifth symbol multiplexed with a first code word of an OCC code word set corresponding to the OCC index
  • a DMRS symbol in an odd slot may be the third symbol multiplexed with the second code word of the OCC code word set.
  • a first gap between two consecutive DMRS symbols (for example, DMRS symbol 911 and DMRS symbol 921) is 4 symbols
  • a second gap between another two consecutive DMRS (for example, DMRS symbol 921 and DMRS symbol 931) symbols is 8 symbols.
  • a DMRS symbol at the beginning of the first gap (for example, DMRS symbol 911) may be multiplexed with a first code word of the OCC code word set
  • a DMRS symbol at the end of the first gap (for example, DMRS symbol 921) may be multiplexed with the second code word of the OCC code word set.
  • FIG. 10 illustrates a schematic diagram of NPUSCH transmission 1000 in accordance with some embodiments of the present disclosure.
  • the DMRS symbol is the 5 th symbol (symbol 4) .
  • the DMRS symbol of even slot of the NPUSCH transmission multiplexed with the 1 st code word of an OCC code word set.
  • a DMRS symbol in each slot may be the fifth symbol, and wherein a DMRS symbol in an even slot is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot may be multiplexed with the second code word of the OCC code word set.
  • a gap between two consecutive DMRS symbols may be 6 symbols.
  • a DMRS symbol in an even slot is multiplexed with a first code word of an OCC code word set corresponding to the OCC index
  • a DMRS symbol in an odd slot is multiplexed with the second code word of the OCC code word set.
  • a first gap between two consecutive DMRS symbols (for example, DMRS symbol 1011 and DMRS symbol 1021) is 6 symbols
  • a second gap between another two consecutive DMRS (for example, DMRS symbol 1021 and DMRS symbol 1031) symbols is 6 symbols.
  • a DMRS symbol at the beginning of the first gap (for example, DMRS symbol 1011) may be multiplexed with a first code word of the OCC code word set
  • a DMRS symbol at the end of the first gap (for example, DMRS symbol 1021) may be multiplexed with the second code word of the OCC code word set.
  • FIG. 11 illustrates a schematic diagram of NPUSCH transmission 1100 in accordance with some embodiments of the present disclosure.
  • a DMRS symbol in an odd slot of four consecutive slots may be the fifth symbol and a DMRS symbol in an even slot of the four consecutive slots may be the third symbol.
  • a first gap between two consecutive DMRS symbols may be 4 symbols, and a second gap between another two consecutive DMRS symbols may be 8 symbols.
  • DMRS symbols in the four consecutive slots may be multiplexed with respective code words of the OCC code word set corresponding to the OCC index.
  • the first NPUSCH slot number is the number of the first slot of the NPUSCH.
  • the DMRS symbol is the 5 th symbol (symbol 4) 1111 multiplexed with the 1 st code word of an OCC code word set.
  • the DMRS symbol is the 5 th symbol (symbol 4) 1131 multiplexed with the 3 rd code word of the same OCC code word set.
  • FIG. 12 illustrates a schematic diagram of NPUSCH transmission 1200 in accordance with some embodiments of the present disclosure.
  • a DMRS symbol in an odd slot of four consecutive slots may be the fifth symbol and a DMRS symbol in an even slot of the four consecutive slots may be the third symbol.
  • a first gap between two consecutive DMRS symbols may be 4 symbols, and a second gap between another two consecutive DMRS symbols may be 8 symbols.
  • DMRS symbols in the four consecutive slots are multiplexed with respective code words of the OCC code word set corresponding to the OCC index.
  • slot with such slot number and three consecutive slots that follow it are referred to as four consecutive slots, where the “first NPUSCH slot number” is the number of the first slot of the NPUSCH.
  • the DMRS symbol is the 5 th symbol (symbol 4) 1211 multiplexed with the 1 st code word of an OCC code word set.
  • the DMRS symbol is the 5 th symbol (symbol 4) 1231 multiplexed with the 3 rd code word of the same OCC code word set.
  • FIG. 13 illustrates a schematic diagram of NPUSCH transmission 1300 in accordance with some embodiments of the present disclosure.
  • a DMRS symbol in each slot may be the fourth symbol or a gap between two consecutive DMRS symbols may be 6 symbols.
  • DMRS symbols in three consecutive slots may be multiplexed with respective code words of the OCC code word set corresponding to the OCC index.
  • the first NPUSCH slot number is the number of the first slot of the NPUSCH.
  • the DMRS symbol is the 4 th symbol (symbol 3) 1311 multiplexed with the 1 st code word of an OCC code word set.
  • FIG. 14 illustrates a schematic diagram of NPUSCH transmission 1400 in accordance with some embodiments of the present disclosure.
  • the DMRS symbol is the 5 th symbol (symbol 4) 1411 multiplexed with the 1 st code word of an OCC code word set.
  • the DMRS symbol is the 3 rd symbol (symbol 2) 1412 multiplexed with the 2 nd code word of the same OCC code word set.
  • a DMRS symbol of the second set of DMRS symbols in an even slot may be the fifth symbol and a further DMRS symbol of the second set of DMRS symbols in an odd slot may be the third symbol.
  • a first gap between two consecutive DMRS symbols of the second set of DMRS symbols may be 4 symbols, and a second gap between another two consecutive DMRS symbols of the second set of DMRS symbols may be 8 symbols.
  • a first DMRS symbol in two consecutive DMRS symbols may be multiplexed with a first code word of an OCC code word set corresponding to the OCC index
  • a second DMRS symbol in the two consecutive DMRS symbols may be multiplexed with the second code word of the OCC code word set.
  • the first distance between two DMRS symbols is 4 symbols and the second distance between two DMRS symbols is 8 symbols.
  • the first symbol is multiplexed with the 1st code word of an OCC code word set
  • the second symbol is multiplexed with the 2nd code word of the same OCC code word set.
  • FIG. 15 illustrates a schematic diagram of NPUSCH transmission 1500 in accordance with some embodiments of the present disclosure.
  • a DMRS symbol of the second set of DMRS symbols in an even slot may be the sixth symbol and a further DMRS symbol of the second set of DMRS symbols in an odd slot may be the second symbol.
  • a first gap between two consecutive DMRS symbols of the second set of DMRS symbols may be 2 symbols, and a second gap between another two consecutive DMRS symbols of the second set of DMRS symbols may be 10 symbols.
  • a first DMRS symbol in two consecutive DMRS symbols may be multiplexed with a first code word of an OCC code word set corresponding to the OCC index
  • a second DMRS symbol in the two consecutive DMRS symbols may be multiplexed with the second code word of the same OCC code word set.
  • the DMRS symbol is the 6 th symbol (symbol 5) 1511 multiplexed with the 1 st code word of an OCC code word set.
  • the DMRS symbol is the 2 th symbol (symbol 1) 1512 multiplexed with the 2 nd code word of the same OCC code word set.
  • the first distance between two DMRS symbols is 2 symbols and the second distance between two DMRS symbols is 10 symbols. After multiplexing, for any two consecutive DMRS symbols, the first symbol multiplexed with the 1st code word of an OCC code word set; the second symbol multiplexed with the 2 nd code word of the same OCC code word set.
  • DMRS symbols are in one or more slot groups, each slot group comprises a plurality of slots.
  • DMRS symbols in the same slot group may be multiplexed with the OCC code word in one OCC code word set corresponding to an OCC index, and DMRS symbols in different slot groups may be multiplexed with OCC code words in different OCC code word sets.
  • FIG. 16 illustrates a schematic diagram of DMRS symbols in slot groups in accordance with some embodiments of the present disclosure.
  • the slot group 1610 and slot group 1620 comprise one slot (such as slot 1601) , respectively.
  • the slot group 1630 and slot group 1640 comprise two slots (such as slot 1602) , respectively.
  • the slot group 1650 and slot group 1660 comprise 3 slots (such as slot 1603) , respectively.
  • FIG. 17 illustrates a flowchart of a communication method 1700 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1700 will be described from the perspective of the terminal device 110 in FIG. 1.
  • the terminal device 110 receives, from a network device 120, configuration information of orthogonal cover code (OCC) , the configuration information comprising an OCC index and an OCC length.
  • OCC orthogonal cover code
  • the terminal device 110 determines a demodulation reference signal (DMRS) pattern for a Narrowband Physical Uplink Shared Channel (NPUSCH) transmission based on the configuration information.
  • DMRS demodulation reference signal
  • the terminal device 110 transmits, to the network device 120, the NPUSCH transmission based on the DMRS pattern and the configuration information.
  • the configuration information is comprised in at least one of: a first configuration for the NPUSCH transmission, or a second configuration for narrowband DMRS.
  • the terminal device is further caused to: determine the NPUSCH transmission by multiplexing an initial NPUSCH transmission based on the configuration information; and determine a first set of DMRS symbols in compliance with the DMRS pattern based on the configuration information; and transmit, to the network device, the NPUSCH transmission together with the first set of DMRS symbols.
  • the DMRS pattern indicates positions of the first set of DMRS symbols.
  • a gap between two consecutive DMRS symbols in the first set of DMRS symbols comprises a first number of symbols, and first number is equal to an integral multiple of the OCC length.
  • the first number is less than a threshold number determined based on subcarrier spacing associated with the NPUSCH transmission.
  • the first set of DMRS symbols are determined by:
  • RU resource unit
  • N RU represents the number of RUs for the NPUSCH transmission
  • w represents a sequence associated with group hopping
  • c represents a persudo-random sequence
  • OccLength represents the OCC length
  • the OCC length equals to 2; and wherein a DMRS symbol in an even slot is the fifth symbol multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot is the first symbol multiplexed with the second code word of the same OCC code word set, or wherein a first gap between two consecutive DMRS symbols is 2 symbols, and a second gap between another two consecutive DMRS symbols is 10 symbols, and wherein a DMRS symbol at the beginning of the first gap is multiplexed with a first code word of the OCC code word set, and a DMRS symbol at the end of the first gap multiplexed with the second code word of the OCC code word set.
  • the OCC length equals to 2; and wherein a DMRS symbol in an even slot is the fifth symbol multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot is the third symbol multiplexed with the second code word of the same OCC code word set, or wherein a first gap between two consecutive DMRS symbols is 4 symbols, and a second gap between another two consecutive DMRS symbols is 8 symbols, and wherein a DMRS symbol at the beginning of the first gap is multiplexed with a first code word of the OCC code word set, and a DMRS symbol at the end of the first gap multiplexed with the second code word of the same OCC code word set.
  • the OCC length equals to 2; and wherein a DMRS symbol in each slot is the fifth symbol, and wherein a DMRS symbol in an even slot is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot is multiplexed with the second code word of the same OCC code word set, or wherein a gap between two consecutive DMRS symbols is 6 symbols, and wherein a DMRS symbol in an even slot is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot is multiplexed with the second code word of the same OCC code word set.
  • the OCC length equals to 4, wherein a DMRS symbol in an odd slot of four consecutive slots is the fifth symbol and a DMRS symbol in an even slot of the four consecutive slots is the third symbol, or wherein a first gap between two consecutive DMRS symbols is 4 symbols, and a second gap between another two consecutive DMRS symbols is 8 symbols, and wherein DMRS symbols in the four consecutive slots are multiplexed with respective code words of the OCC code word set corresponding to the OCC index.
  • the OCC length equals to 4, wherein a DMRS symbol in an odd slot of four consecutive slots is the fifth symbol, and a DMRS symbol in an even slot of the four consecutive slots is the seventh symbol, or wherein a first gap between two consecutive DMRS symbols is 8 symbols, and a second gap between another two consecutive DMRS symbols is 4 symbols, and wherein DMRS symbols in the four consecutive slots are multiplexed with respective code words of the OCC code word set corresponding to the OCC index.
  • the OCC length equals to 3, wherein a DMRS symbol in each slot is the fourth symbol or a gap between two consecutive DMRS symbols is 6 symbols, and wherein DMRS symbols in three consecutive slots are multiplexed with respective code words of the OCC code word set corresponding to the OCC index.
  • the NPUSCH transmission and a second set of DMRS symbols indicated by the DMRS pattern are multiplexed together based on the configuration information.
  • a first gap between two consecutive DMRS symbols in the second set of DMRS symbols comprises a second number of symbols
  • a second gap between another two consecutive DMRS symbols in the second set of DMRS symbols comprises a third number of symbols, the third number being larger than the second number
  • the second number is larger than 2.
  • the OCC length equals to 2; wherein a DMRS symbol of the second set of DMRS symbols in an even slot is the fifth symbol and a further DMRS symbol of the second set of DMRS symbols in an odd slot is the third symbol, or wherein a first gap between two consecutive DMRS symbols of the second set of DMRS symbols is 4 symbols, and a second gap between another two consecutive DMRS symbols of the second set of DMRS symbols is 8 symbols; and wherein during the multiplexing, a first DMRS symbol in two consecutive DMRS symbols is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a second DMRS symbol in the two consecutive DMRS symbols is multiplexed with the second code word of the same OCC code word set.
  • the OCC length equals to 2; wherein a DMRS symbol of the second set of DMRS symbols in an even slot is the sixth symbol and a further DMRS symbol of the second set of DMRS symbols in an odd slot is the second symbol, or wherein a first gap between two consecutive DMRS symbols of the second set of DMRS symbols is 2 symbols, and a second gap between another two consecutive DMRS symbols of the second set of DMRS symbols is 10 symbols; and wherein during the multiplexing, a first DMRS symbol in two consecutive DMRS symbols is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a second DMRS symbol in the two consecutive DMRS symbols is multiplexed with the second code word of the same OCC code word set.
  • the first set of DMRS symbols are in one or more slot groups, each slot group comprising a plurality of slots, and wherein DMRS symbols in the same slot group are multiplexed with the same OCC code word in an OCC code word set corresponding to the OCC index, and DMRS symbols in different slot groups are multiplexed with different OCC code words in the OCC code word set.
  • the first set of DMRS symbols are determined by:
  • RU resource unit
  • N RU represents the number of Rus for the NPUSCH transmission
  • w represents a sequence associated with group hopping
  • c represents a persudo-random sequence
  • OccLength represents the OCC length
  • OCCslotgroup represents the number of slots in a slot group.
  • FIG. 18 illustrates a flowchart of a communication method 1800 implemented at a network device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1800 will be described from the perspective of the network device 120 in FIG. 1.
  • the network device 120 transmits, to a terminal device 110, configuration information of orthogonal cover code (OCC) , the configuration information comprising an OCC index and an OCC length.
  • OCC orthogonal cover code
  • the network device 120 receives, from the terminal device 110, a Narrowband Physical Uplink Shared Channel (NPUSCH) transmission with a demodulation reference signal (DMRS) pattern based on the configuration information.
  • NPUSCH Narrowband Physical Uplink Shared Channel
  • DMRS demodulation reference signal
  • the configuration information is comprised in at least one of: a first configuration for the NPUSCH transmission, or a second configuration for narrowband DMRS.
  • the NPUSCH transmission comprises a multiplexing result of an initial NPUSCH transmission based on the configuration information, and is received together with a first set of DMRS symbols in compliance with the DMRS pattern.
  • the DMRS pattern indicates positions of the first set of DMRS symbols, and wherein a gap between two consecutive DMRS symbols in the first set of DMRS symbols comprises a first number of symbols, the first number being equal to an integral multiple of the OCC length.
  • the first number is less than a threshold number determined based on subcarrier spacing associated with the NPUSCH transmission.
  • the first set of DMRS symbols are determined by:
  • RU resource unit
  • N RU represents the number of RUs for the NPUSCH transmission
  • w represents a sequence associated with group hopping
  • c represents a persudo-random sequence
  • OccLength represents the OCC length
  • the OCC length equals to 2; and wherein a DMRS symbol in an even slot is the fifth symbol multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot is the first symbol multiplexed with the second code word of the same OCC code word set, or wherein a first gap between two consecutive DMRS symbols is 2 symbols, and a second gap between another two consecutive DMRS symbols is 10 symbols, and wherein a DMRS symbol at the beginning of the first gap is multiplexed with a first code word of the OCC code word set, and a DMRS symbol at the end of the first gap multiplexed with the second code word of the same OCC code word set.
  • the OCC length equals to 2; and wherein a DMRS symbol in an even slot is the fifth symbol multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot is the third symbol multiplexed with the second code word of the same OCC code word set, or wherein a first gap between two consecutive DMRS symbols is 4 symbols, and a second gap between another two consecutive DMRS symbols is 8 symbols, and wherein a DMRS symbol at the beginning of the first gap is multiplexed with a first code word of the OCC code word set, and a DMRS symbol at the end of the first gap multiplexed with the second code word of the same OCC code word set.
  • the OCC length equals to 2; and wherein a DMRS symbol in each slot is the fifth symbol, and wherein a DMRS symbol in an even slot is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot is multiplexed with the second code word of the same OCC code word set, or wherein a gap between two consecutive DMRS symbols is 6 symbols, and wherein a DMRS symbol in an even slot is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot is multiplexed with the second code word of the same OCC code word set.
  • the OCC length equals to 4, wherein a DMRS symbol in an odd slot of four consecutive slots is the fifth symbol and a DMRS symbol in an even slot of the four consecutive slots is the third symbol, or wherein a first gap between two consecutive DMRS symbols is 4 symbols, and a second gap between another two consecutive DMRS symbols is 8 symbols, and wherein DMRS symbols in the four consecutive slots are multiplexed with respective code words of the OCC code word set corresponding to the OCC index.
  • the OCC length equals to 4, wherein a DMRS symbol in an odd slot of four consecutive slots is the fifth symbol, and a DMRS symbol in an even slot of the four consecutive slots is the seventh symbol, or wherein a first gap between two consecutive DMRS symbols is 8 symbols, and a second gap between another two consecutive DMRS symbols is 4 symbols, and wherein DMRS symbols in the four consecutive slots are multiplexed with respective code words of the OCC code word set corresponding to the OCC index.
  • the OCC length equals to 3, wherein a DMRS symbol in each slot is the fourth symbol or a gap between two consecutive DMRS symbols is 6 symbols, and wherein DMRS symbols in three consecutive slots are multiplexed with respective code words of the OCC code word set corresponding to the OCC index.
  • the NPUSCH transmission and a second set of DMRS symbols indicated by the DMRS pattern are multiplexed together based on the configuration information.
  • a first gap between two consecutive DMRS symbols in the second set of DMRS symbols comprises a second number of symbols
  • a second gap between another two consecutive DMRS symbols in the second set of DMRS symbols comprises a third number of symbols, the third number being larger than the second number
  • the second number is larger than 2.
  • the OCC length equals to 2; wherein a DMRS symbol of the second set of DMRS symbols in an even slot is the fifth symbol and a further DMRS symbol of the second set of DMRS symbols in an odd slot is the third symbol, or wherein a first gap between two consecutive DMRS symbols of the second set of DMRS symbols is 4 symbols, and a second gap between another two consecutive DMRS symbols of the second set of DMRS symbols is 8 symbols; and wherein during the multiplexing, a first DMRS symbol in two consecutive DMRS symbols is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a second DMRS symbol in the two consecutive DMRS symbols is multiplexed with the second code word of the same OCC code word set.
  • the OCC length equals to 2; wherein a DMRS symbol of the second set of DMRS symbols in an even slot is the sixth symbol and a further DMRS symbol of the second set of DMRS symbols in an odd slot is the second symbol, or wherein a first gap between two consecutive DMRS symbols of the second set of DMRS symbols is 2 symbols, and a second gap between another two consecutive DMRS symbols of the second set of DMRS symbols is 10 symbols; and wherein during the multiplexing, a first DMRS symbol in two consecutive DMRS symbols is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a second DMRS symbol in the two consecutive DMRS symbols is multiplexed with the second code word of the same OCC code word set.
  • the first set of DMRS symbols are in one or more slot groups, each slot group comprising a plurality of slots, and wherein DMRS symbols in the same slot group are multiplexed with the same OCC code word in an OCC code word set corresponding to the OCC index, and DMRS symbols in different slot groups are multiplexed with different OCC code words in the OCC code word set.
  • the first set of DMRS symbols are determined by:
  • RU resource unit
  • N RU represents the number of Rus for the NPUSCH transmission
  • w represents a sequence associated with group hopping
  • c represents a persudo-random sequence
  • OccLength represents the OCC length
  • OCCslotgroup represents the number of slots in a slot group.
  • FIG. 19 is a simplified block diagram of a device 1900 that is suitable for implementing embodiments of the present disclosure.
  • the device 1900 can be considered as a further example implementation of any of the devices as shown in FIG. 1. Accordingly, the device 1900 can be implemented at or as at least a part of the terminal device 110 or the network device 120.
  • the device 1900 includes a processor 1910, a memory 1920 coupled to the processor 1910, a suitable transceiver 1940 coupled to the processor 1910, and a communication interface coupled to the transceiver 1940.
  • the memory 1920 stores at least a part of a program 1930.
  • the transceiver 1940 may be for bidirectional communications or a unidirectional communication based on requirements.
  • the transceiver 1940 may include at least one of a transmitter 1942 and a receiver 1944.
  • the transmitter 1942 and the receiver 1944 may be functional modules or physical entities.
  • the transceiver 1940 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 1930 is assumed to include program instructions that, when executed by the associated processor 1910, enable the device 1900 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGS. 1 to 18.
  • the embodiments herein may be implemented by computer software executable by the processor 1910 of the device 1900, or by hardware, or by a combination of software and hardware.
  • the processor 1910 may be configured to implement various embodiments of the present disclosure.
  • a combination of the processor 1910 and memory 1920 may form processing means 1950 adapted to implement various embodiments of the present disclosure.
  • the memory 1920 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 1920 is shown in the device 1900, there may be several physically distinct memory modules in the device 1900.
  • the processor 1910 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 1900 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 comprising a circuitry.
  • the circuitry is configured to: receive, from a network device, configuration information of orthogonal cover code (OCC) , the configuration information comprising an OCC index and an OCC length; determine a demodulation reference signal (DMRS) pattern for a Narrowband Physical Uplink Shared Channel (NPUSCH) transmission based on the configuration information; and transmit, to the network device, the NPUSCH transmission based on the DMRS pattern and the configuration information.
  • OCC orthogonal cover code
  • DMRS demodulation reference signal
  • NPUSCH Narrowband Physical Uplink Shared Channel
  • the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
  • a network device comprising a circuitry.
  • the circuitry is configured to: transmit, to a terminal device, configuration information of orthogonal cover code (OCC) , the configuration information comprising an OCC index and an OCC length; and receive, from the terminal device, a Narrowband Physical Uplink Shared Channel (NPUSCH) transmission with a demodulation reference signal (DMRS) pattern based on the configuration information.
  • OCC orthogonal cover code
  • NPUSCH Narrowband Physical Uplink Shared Channel
  • DMRS demodulation reference signal
  • the circuitry may be configured to perform any method implemented by the network device as discussed above.
  • 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.
  • a first apparauts comprises means for receiving, from a network device, configuration information of orthogonal cover code (OCC) , the configuration information comprising an OCC index and an OCC length; means for determining a demodulation reference signal (DMRS) pattern for a Narrowband Physical Uplink Shared Channel (NPUSCH) transmission based on the configuration information; and means for transmitting, to the network device, the NPUSCH transmission based on the DMRS pattern and the configuration information.
  • the first apparatus may comprise means for performing the respective operations of the method 1700.
  • the first apparatus may further comprise means for performing other operations in some example embodiments of the method 1700.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • a second apparatus comprises means for transmitting, to a terminal device, configuration information of orthogonal cover code (OCC) , the configuration information comprising an OCC index and an OCC length; and means for receiving, from the terminal device, a Narrowband Physical Uplink Shared Channel (NPUSCH) transmission with a demodulation reference signal (DMRS) pattern based on the configuration information.
  • OCC orthogonal cover code
  • NPUSCH Narrowband Physical Uplink Shared Channel
  • DMRS demodulation reference signal
  • the second apparatus may comprise means for performing the respective operations of the method 1800.
  • the second apparatus may further comprise means for performing other operations in some example embodiments of the method 1800.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • embodiments of the present disclosure provide the following aspects.
  • a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, configuration information of orthogonal cover code (OCC) , the configuration information comprising an OCC index and an OCC length; determine a demodulation reference signal (DMRS) pattern for a Narrowband Physical Uplink Shared Channel (NPUSCH) transmission based on the configuration information; and transmit, to the network device, the NPUSCH transmission based on the DMRS pattern and the configuration information.
  • OCC orthogonal cover code
  • DMRS demodulation reference signal
  • NPUSCH Narrowband Physical Uplink Shared Channel
  • the configuration information is comprised in at least one of: a first configuration for the NPUSCH transmission, or a second configuration for narrowband DMRS.
  • the terminal device is further caused to: determine the NPUSCH transmission by multiplexing an initial NPUSCH transmission based on the configuration information; and determine a first set of DMRS symbols in compliance with the DMRS pattern based on the configuration information; and transmit, to the network device, the NPUSCH transmission together with the first set of DMRS symbols.
  • the DMRS pattern indicates positions of the first set of DMRS symbols, and wherein a gap between two consecutive DMRS symbols in the first set of DMRS symbols comprises a first number of symbols, the first number being equal to an integral multiple of the OCC length.
  • the first number is less than a threshold number determined based on subcarrier spacing associated with the NPUSCH transmission.
  • the first set of DMRS symbols are determined by:
  • RU resource unit
  • N RU represents the number of RUs for the NPUSCH transmission
  • w represents a sequence associated with group hopping
  • c represents a persudo-random sequence
  • OccLength represents the OCC length
  • the OCC length equals to 2; and wherein a DMRS symbol in an even slot is the fifth symbol multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot is the first symbol multiplexed with the second code word of the same OCC code word set, or wherein a first gap between two consecutive DMRS symbols is 2 symbols, and a second gap between another two consecutive DMRS symbols is 10 symbols, and wherein a DMRS symbol at the beginning of the first gap is multiplexed with a first code word of the OCC code word set, and a DMRS symbol at the end of the first gap multiplexed with the second code word of the same OCC code word set.
  • the OCC length equals to 2; and wherein a DMRS symbol in an even slot is the fifth symbol multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot is the third symbol multiplexed with the second code word of the same OCC code word set, or wherein a first gap between two consecutive DMRS symbols is 4 symbols, and a second gap between another two consecutive DMRS symbols is 8 symbols, and wherein a DMRS symbol at the beginning of the first gap is multiplexed with a first code word of the OCC code word set, and a DMRS symbol at the end of the first gap multiplexed with the second code word of the same OCC code word set.
  • the OCC length equals to 2; and wherein a DMRS symbol in each slot is the fifth symbol, and wherein a DMRS symbol in an even slot is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot is multiplexed with the second code word of the same OCC code word set, or wherein a gap between two consecutive DMRS symbols is 6 symbols, and wherein a DMRS symbol in an even slot is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot is multiplexed with the second code word of the same OCC code word set.
  • the OCC length equals to 4, wherein a DMRS symbol in an odd slot of four consecutive slots is the fifth symbol and a DMRS symbol in an even slot of the four consecutive slots is the third symbol, or wherein a first gap between two consecutive DMRS symbols is 4 symbols, and a second gap between another two consecutive DMRS symbols is 8 symbols, and wherein DMRS symbols in the four consecutive slots are multiplexed with respective code words of the OCC code word set corresponding to the OCC index.
  • the OCC length equals to 4, wherein a DMRS symbol in an odd slot of four consecutive slots is the fifth symbol, and a DMRS symbol in an even slot of the four consecutive slots is the seventh symbol, or wherein a first gap between two consecutive DMRS symbols is 8 symbols, and a second gap between another two consecutive DMRS symbols is 4 symbols, and wherein DMRS symbols in the four consecutive slots are multiplexed with respective code words of the OCC code word set corresponding to the OCC index.
  • the OCC length equals to 3, wherein a DMRS symbol in each slot is the fourth symbol or a gap between two consecutive DMRS symbols is 6 symbols, and wherein DMRS symbols in three consecutive slots are multiplexed with respective code words of the OCC code word set corresponding to the OCC index.
  • the NPUSCH transmission and a second set of DMRS symbols indicated by the DMRS pattern are multiplexed together based on the configuration information.
  • a first gap between two consecutive DMRS symbols in the second set of DMRS symbols comprises a second number of symbols
  • a second gap between another two consecutive DMRS symbols in the second set of DMRS symbols comprises a third number of symbols, the third number being larger than the second number
  • the second number is larger than 2.
  • the OCC length equals to 2; wherein a DMRS symbol of the second set of DMRS symbols in an even slot is the fifth symbol and a further DMRS symbol of the second set of DMRS symbols in an odd slot is the third symbol, or wherein a first gap between two consecutive DMRS symbols of the second set of DMRS symbols is 4 symbols, and a second gap between another two consecutive DMRS symbols of the second set of DMRS symbols is 8 symbols; and wherein during the multiplexing, a first DMRS symbol in two consecutive DMRS symbols is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a second DMRS symbol in the two consecutive DMRS symbols is multiplexed with the second code word of the same OCC code word set.
  • the OCC length equals to 2; wherein a DMRS symbol of the second set of DMRS symbols in an even slot is the sixth symbol and a further DMRS symbol of the second set of DMRS symbols in an odd slot is the second symbol, or wherein a first gap between two consecutive DMRS symbols of the second set of DMRS symbols is 2 symbols, and a second gap between another two consecutive DMRS symbols of the second set of DMRS symbols is 10 symbols; and wherein during the multiplexing, a first DMRS symbol in two consecutive DMRS symbols is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a second DMRS symbol in the two consecutive DMRS symbols is multiplexed with the second code word of the same OCC code word set.
  • the first set of DMRS symbols are in one or more slot groups, each slot group comprising a plurality of slots, and wherein DMRS symbols in the same slot group are multiplexed with the same OCC code word in an OCC code word set corresponding to the OCC index, and DMRS symbols in different slot groups are multiplexed with different OCC code words in the OCC code word set.
  • the first set of DMRS symbols are determined by:
  • RU resource unit
  • N RU represents the number of Rus for the NPUSCH transmission
  • w represents a sequence associated with group hopping
  • c represents a persudo-random sequence
  • OccLength represents the OCC length
  • OCCslotgroup represents the number of slots in a slot group.
  • a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, configuration information of orthogonal cover code (OCC) , the configuration information comprising an OCC index and an OCC length; and receive, from the terminal device, a Narrowband Physical Uplink Shared Channel (NPUSCH) transmission with a demodulation reference signal (DMRS) pattern based on the configuration information.
  • OCC orthogonal cover code
  • NPUSCH Narrowband Physical Uplink Shared Channel
  • DMRS demodulation reference signal
  • the configuration information is comprised in at least one of: a first configuration for the NPUSCH transmission, or a second configuration for narrowband DMRS.
  • the NPUSCH transmission comprises a multiplexing result of an initial NPUSCH transmission based on the configuration information, and is received together with a first set of DMRS symbols in compliance with the DMRS pattern.
  • the DMRS pattern indicates positions of the first set of DMRS symbols, and wherein a gap between two consecutive DMRS symbols in the first set of DMRS symbols comprises a first number of symbols, the first number being equal to an integral multiple of the OCC length.
  • the first number is less than a threshold number determined based on subcarrier spacing associated with the NPUSCH transmission.
  • the first set of DMRS symbols are determined by:
  • RU resource unit
  • N RU represents the number of RUs for the NPUSCH transmission
  • w represents a sequence associated with group hopping
  • c represents a persudo-random sequence
  • OccLength represents the OCC length
  • the OCC length equals to 2; and wherein a DMRS symbol in an even slot is the fifth symbol multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot is the first symbol multiplexed with the second code word of the same OCC code word set, or wherein a first gap between two consecutive DMRS symbols is 2 symbols, and a second gap between another two consecutive DMRS symbols is 10 symbols, and wherein a DMRS symbol at the beginning of the first gap is multiplexed with a first code word of the OCC code word set, and a DMRS symbol at the end of the first gap multiplexed with the second code word of the same OCC code word set.
  • the OCC length equals to 2; and wherein a DMRS symbol in an even slot is the fifth symbol multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot is the third symbol multiplexed with the second code word of the same OCC code word set, or wherein a first gap between two consecutive DMRS symbols is 4 symbols, and a second gap between another two consecutive DMRS symbols is 8 symbols, and wherein a DMRS symbol at the beginning of the first gap is multiplexed with a first code word of the OCC code word set, and a DMRS symbol at the end of the first gap multiplexed with the second code word of the same OCC code word set.
  • the OCC length equals to 2; and wherein a DMRS symbol in each slot is the fifth symbol, and wherein a DMRS symbol in an even slot is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot is multiplexed with the second code word of the same OCC code word set, or wherein a gap between two consecutive DMRS symbols is 6 symbols, and wherein a DMRS symbol in an even slot is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a DMRS symbol in an odd slot is multiplexed with the second code word of the same OCC code word set.
  • the OCC length equals to 4, wherein a DMRS symbol in an odd slot of four consecutive slots is the fifth symbol and a DMRS symbol in an even slot of the four consecutive slots is the third symbol, or wherein a first gap between two consecutive DMRS symbols is 4 symbols, and a second gap between another two consecutive DMRS symbols is 8 symbols, and wherein DMRS symbols in the four consecutive slots are multiplexed with respective code words of the OCC code word set corresponding to the OCC index.
  • the OCC length equals to 4, wherein a DMRS symbol in an odd slot of four consecutive slots is the fifth symbol, and a DMRS symbol in an even slot of the four consecutive slots is the seventh symbol, or wherein a first gap between two consecutive DMRS symbols is 8 symbols, and a second gap between another two consecutive DMRS symbols is 4 symbols, and wherein DMRS symbols in the four consecutive slots are multiplexed with respective code words of the OCC code word set corresponding to the OCC index.
  • the OCC length equals to 3, wherein a DMRS symbol in each slot is the fourth symbol or a gap between two consecutive DMRS symbols is 6 symbols, and wherein DMRS symbols in three consecutive slots are multiplexed with respective code words of the OCC code word set corresponding to the OCC index.
  • the NPUSCH transmission and a second set of DMRS symbols indicated by the DMRS pattern are multiplexed together based on the configuration information.
  • a first gap between two consecutive DMRS symbols in the second set of DMRS symbols comprises a second number of symbols
  • a second gap between another two consecutive DMRS symbols in the second set of DMRS symbols comprises a third number of symbols, the third number being larger than the second number
  • the second number is larger than 2.
  • the OCC length equals to 2; wherein a DMRS symbol of the second set of DMRS symbols in an even slot is the fifth symbol and a further DMRS symbol of the second set of DMRS symbols in an odd slot is the third symbol, or wherein a first gap between two consecutive DMRS symbols of the second set of DMRS symbols is 4 symbols, and a second gap between another two consecutive DMRS symbols of the second set of DMRS symbols is 8 symbols; and wherein during the multiplexing, a first DMRS symbol in two consecutive DMRS symbols is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a second DMRS symbol in the two consecutive DMRS symbols is multiplexed with the second code word of the same OCC code word set.
  • the OCC length equals to 2; wherein a DMRS symbol of the second set of DMRS symbols in an even slot is the sixth symbol and a further DMRS symbol of the second set of DMRS symbols in an odd slot is the second symbol, or wherein a first gap between two consecutive DMRS symbols of the second set of DMRS symbols is 2 symbols, and a second gap between another two consecutive DMRS symbols of the second set of DMRS symbols is 10 symbols; and wherein during the multiplexing, a first DMRS symbol in two consecutive DMRS symbols is multiplexed with a first code word of an OCC code word set corresponding to the OCC index, and a second DMRS symbol in the two consecutive DMRS symbols is multiplexed with the second code word of the same OCC code word set.
  • the first set of DMRS symbols are in one or more slot groups, each slot group comprising a plurality of slots, and wherein DMRS symbols in the same slot group are multiplexed with the same OCC code word in an OCC code word set corresponding to the OCC index, and DMRS symbols in different slot groups are multiplexed with different OCC code words in the OCC code word set.
  • the first set of DMRS symbols are determined by:
  • RU resource unit
  • N RU represents the number of Rus for the NPUSCH transmission
  • w represents a sequence associated with group hopping
  • c represents a persudo-random sequence
  • OccLength represents the OCC length
  • OCCslotgroup represents the number of slots in a slot group.
  • a terminal device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the terminal device discussed above.
  • a network device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the network device discussed above.
  • a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
  • a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
  • a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
  • a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
  • 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 19.
  • 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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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des modes de réalisation de la présente divulgation concernent une solution pour une amélioration de transmission de canal partagé de liaison montante physique à bande étroite (NPUSCH). Dans une solution, un dispositif terminal reçoit, en provenance d'un dispositif de réseau, des informations de configuration de code de couverture orthogonal (OCC), les informations de configuration comprenant un indice OCC et une longueur OCC; détermine un motif de signal de référence de démodulation (DMRS) pour une transmission NPUSCH sur la base des informations de configuration; et transmet, au dispositif de réseau, la transmission NPUSCH sur la base du motif DMRS et des informations de configuration.
PCT/CN2024/092496 2024-05-10 2024-05-10 Procédés et dispositifs d'amélioration de transmission de liaison montante Pending WO2025231915A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210344468A1 (en) * 2018-10-05 2021-11-04 Appe Inc. Additional DMRS for NR PDSCH Considering LTE-NR DL Sharing
WO2022087850A1 (fr) * 2020-10-27 2022-05-05 Nec Corporation Procédé, dispositif et support lisible par ordinateur destinés à la communication
US20220416961A1 (en) * 2019-11-13 2022-12-29 Telefonaktiebolaget Lm Ericsson (Publ) Demodulation Reference Signals for Shared Radio
CN116896432A (zh) * 2022-04-02 2023-10-17 维沃移动通信有限公司 解调参考信号传输方法、装置、终端及网络侧设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210344468A1 (en) * 2018-10-05 2021-11-04 Appe Inc. Additional DMRS for NR PDSCH Considering LTE-NR DL Sharing
US20220416961A1 (en) * 2019-11-13 2022-12-29 Telefonaktiebolaget Lm Ericsson (Publ) Demodulation Reference Signals for Shared Radio
WO2022087850A1 (fr) * 2020-10-27 2022-05-05 Nec Corporation Procédé, dispositif et support lisible par ordinateur destinés à la communication
CN116896432A (zh) * 2022-04-02 2023-10-17 维沃移动通信有限公司 解调参考信号传输方法、装置、终端及网络侧设备

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