WO2021081852A1 - Procédé d'indication de ressource et dispositif associé - Google Patents

Procédé d'indication de ressource et dispositif associé Download PDF

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Publication number
WO2021081852A1
WO2021081852A1 PCT/CN2019/114501 CN2019114501W WO2021081852A1 WO 2021081852 A1 WO2021081852 A1 WO 2021081852A1 CN 2019114501 W CN2019114501 W CN 2019114501W WO 2021081852 A1 WO2021081852 A1 WO 2021081852A1
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Prior art keywords
control information
time domain
frequency domain
information
start position
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PCT/CN2019/114501
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English (en)
Chinese (zh)
Inventor
王俊伟
黎超
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201980100320.5A priority Critical patent/CN114365563A/zh
Priority to PCT/CN2019/114501 priority patent/WO2021081852A1/fr
Publication of WO2021081852A1 publication Critical patent/WO2021081852A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • This application relates to the field of wireless network technology, and in particular to a resource indication method and related equipment.
  • the current standard discusses supporting two-level side link control information (sidelinik control information, SCI) for the transmission of control channel information, referred to as two-level SCI. It is generally considered that the resources of the first-level SCI and the second-level SCI are adjacent or frequency division multiplexed. In this way, after analyzing the first-level SCI, it can receive the physical sidelink control channel (PSCCH) that carries the second-level SCI as soon as possible, and analyze the second-level SCI, so as to minimize the delay To receive the physical sidelink shared channel (PSSCH).
  • PSCCH physical sidelink control channel
  • PSSCH physical sidelink shared channel
  • the present application provides a resource indication method and related equipment, which can improve the flexibility of the resource indication of the control channel and improve the performance of signal demodulation.
  • an embodiment of the present application provides a resource indication method, including: a terminal device receives first indication information and first control information sent by a network device; and determining the second control information according to the first indication information and the first control information The time domain start position of the information and the frequency domain start position of the second control information; according to the time domain start position of the second control information and the frequency domain start position of the second control information, the second control sent by the network device is received letter.
  • the start symbol position of the second control information is determined. This not only improves the flexibility of the resource indication of the second control information, but also can correctly receive the second control information, which can be effectively used as the receiving pilot of the data channel, thereby improving the receiving performance of the data channel.
  • the time domain start position of the second control information is determined according to the reference time domain position and the offset relative to the reference time domain position.
  • the flexibility of the resource indication of the second control information can be improved.
  • the first indication information includes an offset relative to the reference time domain position.
  • the first indication information includes time domain information and frequency domain information.
  • the time domain information includes a reference time domain position
  • the reference time domain position includes the last symbol position of the first control information, the first symbol position of the first control information, and the first symbol position of the data channel.
  • the frequency domain information includes the reference frequency domain position, and the reference frequency domain position includes the frequency domain start of the first control information At least one of the position, the frequency domain start position of the control channel, and the frequency domain center position of the data channel.
  • the first indication information further includes resource configuration time-domain factors
  • the resource configuration time-domain factors include the size of the subcarrier spacing SCS, the configuration of additional DMRS in the demodulation reference signal DMRS mode, and hybrid automatic At least one of the feedback conditions of the retransmitted confirmation information is fed back.
  • the first indication information includes a resource configuration time domain factor and a reference time domain location.
  • the resource configuration time domain factor corresponds to the reference time domain location.
  • the first control information includes an offset relative to the reference time domain position.
  • the first indication information includes a resource configuration time domain factor and an offset relative to a reference time domain position, where the resource configuration time domain factor corresponds to the offset relative to the reference time domain position.
  • the first control information includes the reference time domain position.
  • the terminal device determines the currently supported resource configuration time domain factor; and searches the first indication information for the offset and reference time corresponding to the resource configuration time domain factor relative to the reference time domain position.
  • Domain position; the time domain start position of the second control information is determined according to the offset relative to the reference time domain position and the reference time domain position.
  • the time domain starting position of the second control information is determined by the currently supported resource configuration time domain factors, which not only improves the flexibility of the resource indication of the second control information, but also can correctly receive the second control information, which can be effectively used as the data channel. Receive pilot to improve the receiving performance of the data channel.
  • the first control information includes the frequency domain start position of the second control information.
  • the frequency domain start position of the second control information is indicated by the first control information, thereby effectively guaranteeing the transmission of the second control information.
  • the terminal device obtains the frequency domain start position of the first control information through blind detection; and uses the frequency domain start position of the first control information as the frequency domain start position of the second control information.
  • the frequency domain start position of the second control information is determined by blind detection, thereby effectively ensuring the transmission of the second control information.
  • embodiments of the present application provide a resource indication method, including: a network device sends first indication information and first control information to a terminal device, where the first indication information and first control information are used by the terminal device to determine the second The time-domain start position of the control information and the frequency-domain start position of the second control information, the time-domain start position of the second control information and the frequency-domain start position of the second control information are used by the terminal device to receive the information sent by the network device The second control information.
  • the start symbol position of the second control information is determined. This not only improves the flexibility of the resource indication of the second control information, but also can correctly receive the second control information, which can be effectively used as the receiving pilot of the data channel, thereby improving the receiving performance of the data channel.
  • the time domain start position of the second control information is determined according to the reference time domain position and the offset relative to the reference time domain position.
  • the flexibility of the resource indication of the second control information can be improved.
  • the first indication information includes an offset relative to the reference time domain position.
  • the first indication information includes time domain information and frequency domain information.
  • the time domain information includes a reference time domain position
  • the reference time domain position includes the last symbol position of the first control information, the first symbol position of the first control information, and the first symbol position of the data channel.
  • the frequency domain information includes the reference frequency domain position, and the reference frequency domain position includes the frequency domain start of the first control information At least one of the position, the frequency domain start position of the control channel, and the frequency domain center position of the data channel.
  • the first indication information further includes resource configuration time-domain factors
  • the resource configuration time-domain factors include the size of the subcarrier spacing SCS, the configuration of additional DMRS in the demodulation reference signal DMRS mode, and hybrid automatic At least one of the feedback conditions of the retransmitted confirmation information is fed back.
  • the first indication information includes a resource configuration time domain factor and a reference time domain location.
  • the resource configuration time domain factor corresponds to the reference time domain location.
  • the first control information includes an offset relative to the reference time domain position.
  • the first indication information includes a resource configuration time domain factor and an offset relative to a reference time domain position, where the resource configuration time domain factor corresponds to the offset relative to the reference time domain position.
  • the first control information includes the reference time domain position.
  • the terminal device maps the second control information to the frequency domain based on the frequency domain start position of the second control information, the number of frequency domain resources occupied by the second control information, and the number of frequency domain resources. Resources.
  • the terminal device obtains the frequency domain resource position occupied by the DMRS; and maps the second control information according to the frequency domain resource position occupied by the DMRS.
  • the second control information and the scheduled data channel can be resource mapped in a frequency division multiplexing manner, which not only guarantees simple data mapping and demodulation, but also allows more allocations on the control channel The transmit power.
  • the second control information may be mapped to the middle position of the frequency domain of the data channel. This can reduce the out-of-band leakage of adjacent frequency bands, thereby improving the decoding performance of control information.
  • the embodiments of the present application provide a resource indicating device, which is configured to implement the methods and functions performed by the terminal device in the above-mentioned first aspect, and is implemented by hardware/software.
  • the hardware/software includes and Modules corresponding to the above functions.
  • an embodiment of the present application provides a resource indicating device, which is configured to implement the methods and functions performed by the network device in the second aspect described above, and is implemented by hardware/software.
  • the hardware/software includes and Modules corresponding to the above functions.
  • an embodiment of the present application provides a terminal device, including a processor and a memory; the memory is used to store computer-executable instructions; the processor is used to execute the computer-executable instructions stored in the memory, so that all The terminal device executes the methods and functions performed by the terminal device in the first aspect described above.
  • an embodiment of the present application provides a network device including a processor and a memory; the memory is used to store computer-executable instructions; the processor is used to execute the computer-executable instructions stored in the memory, so that all The network device executes the methods and functions performed by the network device in the second aspect described above.
  • the present application provides a computer-readable storage medium that stores instructions in the computer-readable storage medium, which when run on a computer, causes the computer to execute the method in any of the above-mentioned aspects.
  • the present application provides a computer program product, the computer program product is used to store a computer program, and when the computer program runs on a computer, the computer executes the method of any one of the above aspects.
  • an embodiment of the present application provides a communication system, including the terminal device in any of the foregoing aspects and the network device in any of the foregoing aspects.
  • FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • Figure 2 is a schematic diagram of a control channel resource set
  • Figure 3 is a schematic diagram of a search space and aggregation level
  • Figure 4 is a schematic diagram of an interleaving mapping
  • FIG. 5 is a schematic diagram of a two-level SCI sending and receiving provided by an embodiment of the present application.
  • Figure 6 is a schematic diagram of a multiplexing relationship between PSCCH1 and PSCCH2;
  • FIG. 7 is a schematic flowchart of a resource indication method provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of PSCCH2 mapping provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application.
  • FIG. 11 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application.
  • FIG. 12 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application.
  • FIG. 13 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a resource indicating device provided by an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of another resource indicating device provided by an embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of a terminal device proposed in an embodiment of the present application.
  • FIG. 17 is a schematic structural diagram of a network device proposed in an embodiment of the present application.
  • Fig. 1 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • the communication system includes a network device and at least one terminal device 103, where the network device may include a core network device 101 and a wireless access network device 102.
  • the terminal device is connected to the wireless access network device in a wireless manner, and the wireless access network device is connected to the core network device in a wireless or wired manner.
  • the core network device and the wireless access network device can be separate and different physical devices, or it can integrate the functions of the core network device and the logical function of the wireless access network device on the same physical device, or it can be a physical device. It integrates the functions of part of the core network equipment and part of the wireless access network equipment.
  • the terminal device can be a fixed location, or it can be movable.
  • Fig. 1 is only a schematic diagram.
  • the communication system may also include other network equipment, such as wireless relay equipment and wireless backhaul equipment, which are not shown in Fig. 1.
  • the embodiment of the present application does not limit the number of core network equipment, radio access network equipment, and terminal equipment included in the mobile communication system.
  • Radio access network equipment is the access equipment that terminal equipment accesses to the mobile communication system through wireless means. It can be a base station NodeB, an evolved base station (evolved Node B, eNodeB), and the 5th generation mobile networks. , The base station in the 5G) system, the base station in the future mobile communication system, or the access node in the WiFi system, etc.
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the wireless access network equipment.
  • the terminal device may also be called a terminal (terminal), user equipment (UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), and so on.
  • Terminal devices can be mobile phones, tablets, computers with wireless transceiver functions, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, industrial control (industrial control) Wireless terminals in ), wireless terminals in self-driving (self-driving), wireless terminals in remote medical surgery, wireless terminals in smart grid, and wireless terminals in transportation safety (transportation safety) Terminals, wireless terminals in smart cities, wireless terminals in smart homes, and so on.
  • Wireless access network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on airborne aircraft, balloons, and satellites.
  • the embodiments of the present application do not limit the application scenarios of wireless access network equipment and terminal equipment.
  • the embodiments of the present application can be applied to downlink signal transmission, can also be applied to uplink signal transmission, and can also be applied to device-to-device (D2D) signal transmission.
  • the sending device is a wireless access network device, and the corresponding receiving device is a terminal device.
  • the sending device is a terminal device, and the corresponding receiving device is a wireless access network device.
  • D2D signal transmission the sending device is a terminal device, and the corresponding receiving device is also a terminal device.
  • the embodiment of the present application does not limit the transmission direction of the signal.
  • Wireless access network equipment and terminal equipment can communicate through licensed spectrum, or through unlicensed spectrum, or through licensed spectrum and free spectrum at the same time.
  • Wireless access network equipment and terminal equipment and between terminal equipment and terminal equipment can communicate through the frequency spectrum below 6G, or through the frequency spectrum above 6G, and can also use the frequency spectrum below 6G and the spectrum above 6G at the same time To communicate.
  • the embodiment of the present application does not limit the spectrum resource used between the radio access network device and the terminal device.
  • the related information of the control channel configured by the network device includes the following parameters:
  • Control channel resource set (control resource set, coreset), indicating the frequency domain and time domain information that may be occupied by the control channel, including frequency domain resources and time domain duration (duration).
  • Each time domain duration can be It includes 1-3 orthogonal frequency division multiplexing (OFDM) symbols.
  • FIG. 2 is a schematic diagram of a control channel resource set provided by an embodiment of the present application.
  • A a time domain duration can include 3 OFDM symbols.
  • B a time domain duration can include 3 OFDM symbols.
  • C One time domain duration can include one OFDM symbol.
  • the gray parts are occupied time domain resources and frequency domain resources.
  • the search space means that the blind detection of the control channel is performed in the defined space, and the unit of the blind detection is performed according to the aggregation level (AL).
  • the unit of the aggregation level is a control-channel element (CCE).
  • CCE control-channel element
  • Each CCE has 6 resource element groups (REG), and each REG is composed of 1 resource block (RB).
  • REG resource element groups
  • RB resource block
  • Figure 3 is a schematic diagram of a search space and aggregation level.
  • the control channel can use a fixed quadrature phase shift keying (quadrature phase shift keyin, QPSK) method.
  • QPSK quadrature phase shift keyin
  • the occupied resources are compared More (for example, 16 CCE), only need to blindly check once, the relative bit rate is relatively low, suitable for transmission in low signal-to-noise ratio.
  • Interleaving mapping is to perform CCE to REG mapping discontinuously according to a certain rule
  • non-interleaving mapping is to continuously perform CCE to REG mapping according to a certain rule.
  • Figure 4 is a schematic diagram of an interleaving mapping. The formula of the interleaver is as follows:
  • the control channel is the control information for the terminal device to receive the data channel.
  • the control channel content can be downlink control information (DCI)
  • DCI downlink control information
  • the control channel content is SCI
  • the control channel is used to support services Channel PDSCH or PUSCH reception or transmission.
  • Sidelink control channel content can include: type indication, PSSCH frequency domain information, PSSCH frequency domain information, resource reservation indication, target address ID, source address ID, hybrid automatic repeat request, HARQ process ID), new data indication (new data Indication, NDI) data transmission redundancy version (RV), modulation and coding scheme (MCS), service priority indication (priority of QoS), cycle Redundancy check code (cyclic redundancy check, CRC) and so on.
  • type indication PSSCH frequency domain information
  • PSSCH frequency domain information PSSCH frequency domain information
  • resource reservation indication target address ID, source address ID, hybrid automatic repeat request, HARQ process ID
  • new data indication new data Indication
  • NDI data transmission redundancy version
  • MCS modulation and coding scheme
  • service priority indication priority of QoS
  • cycle Redundancy check code cyclic redundancy check, CRC
  • the current standard discusses supporting two-level SCI for the transmission of control channel information, referred to as two-level SCI.
  • the first-level SCI bears the information of channel detection, that is, after receiving the first-level SCI, all terminal equipment knows which link resources will be on Data transmission is performed, so that when the UE selects time domain resources and frequency domain resources for sending data, resource avoidance is performed, thereby reducing interference.
  • FIG. 5 is a schematic diagram of a two-level SCI sending and receiving provided by an embodiment of the present application. In the network equipment test, the first level of SCI is sent first, then the second level of SCI, and finally the PSSCH data. On the terminal device side, the first level of SCI is blindly checked.
  • Blind detection means that the terminal device may have to try multiple times to receive until it receives a valid SCI or all attempts may be traversed. If the first-level SCI is detected blindly, the second-level SCI is received according to the first-level SCI. After analyzing the second-level SCI, use the second-level SCI and the first-level SCI to receive the PSSCH.
  • FIG. 6 is a schematic diagram of the multiplexing relationship between PSCCH1 and PSCCH2. Among them, PSCCH1 is used to carry the first level of SCI, and PSCCH2 is used to carry the second level of SCI.
  • PSCCH1 and PSCCH2 are adjacent or frequency division multiplexed. It is guaranteed to receive PSCCH2 as soon as possible after analyzing the first level SCI, and analyze the second level SCI, so as to receive the PSSCH channel with the minimum delay.
  • this method is relatively simple and not flexible enough.
  • FIG. 7 is a schematic flowchart of a resource indication method provided by an embodiment of the present application.
  • the steps in the embodiment of this application at least include:
  • first control information and second control information jointly determine the scheduling of a traffic channel.
  • the first control information may refer to the first part of downlink control information (DCI), or PDCCH-1
  • the second control information may refer to the second part of DCI, or PDCCH-2
  • the scheduled data channel can be PDSCH or PUSCH.
  • the first control information can refer to the first part of the SCI, or called PSCCH-1
  • the second control information can refer to the second part of the SCI, or called PSCCH-2, which is scheduled
  • the data channel may be PSSCH.
  • a side link is taken as an example for description.
  • a network device sends first indication information and first control information to a terminal device, and the terminal device receives the first indication information and first control information sent by the network device.
  • the first control information may be DCI or SCI.
  • the first indication information may be configuration information. Including but not limited to the following options:
  • the network device may first send the first indication information, and then send the first control information.
  • the first control information may be sent first, and then the first instruction information may be sent.
  • the timing position of the first indication information and the first control information is not limited.
  • the first indication information includes resource configuration time-domain factors
  • the resource configuration time-domain factors include the size of subcarrier spacing (SCS), and demodulation reference signals (DMRS).
  • SCS subcarrier spacing
  • DMRS demodulation reference signals
  • At least one of the configuration of the DMRS and the feedback of the acknowledgement information (HARQ-ACK) of the hybrid automatic feedback retransmission (HARQ-ACK) is added in the pattern.
  • the first indication information further includes time domain information and frequency domain information
  • the time domain information includes the reference time domain position and other time domain related information.
  • the reference time domain position includes the last symbol position of the first control information, the first symbol position of the first control information, the first symbol position of the data channel, and the first symbol position of the demodulation reference signal DMRS. At least one of a symbol position and a boundary position of a time domain resource; the frequency domain information includes a reference frequency domain position and other frequency domain related information, and the reference frequency domain position includes a frequency domain of the first control information At least one of the start position, the frequency domain start position of the control channel, and the frequency domain center position of the data channel.
  • the first indication information further includes the offset relative to the reference time domain position.
  • the resource configuration time domain factor in the first indication information, the reference time domain position, and the offset relative to the reference time domain position correspond to three.
  • the configuration information includes resource configuration time domain factors (the size of the subcarrier interval), reference time domain position (PSCCH1 occupies the last symbol position), and an offset relative to the reference time domain position.
  • l0 indicates that PSCCH1 occupies the last symbol position
  • k0, k1, k2, k3, and k4 indicate the offset of the second SCI relative to the last symbol position occupied by PSCCH1.
  • the terminal device can receive the second SCI according to the configuration information in the first row of Table 2, shifting k0 symbols backward on the last symbol position l0 occupied by PSCCH1 and then receiving the second SCI.
  • the greater the subcarrier spacing the greater the value of the offset.
  • the offset can take values of 2, 3, 4, 7, or 9, and so on.
  • the size of the sub-carrier spacing SCS the table only lists the above five cases, when the size of the sub-carrier spacing SCS is other values, the offset can be changed accordingly, such as when the sub-carrier spacing SCS When the value is 7.5KHz, 3.75KHz, 480KHz, the offset can be changed accordingly.
  • l0 may also indicate the start position of the data channel (for example, the PSSCH data channel) in the time domain, the position of the time domain resources occupied by the DMRS, or the boundary position of the time domain resources.
  • the configuration information includes resource configuration time domain factors (the configuration of additional DMRS in the demodulation reference signal DMRS mode or the feedback of the confirmation information of the hybrid automatic feedback retransmission), the reference time domain location (PSCCH1 occupancy The last symbol position) and the offset relative to the reference time domain position.
  • l0 indicates that PSCCH1 occupies the last symbol position
  • k0, k1, k2, k3, and k4 indicate the offset of the second SCI relative to the last symbol position occupied by PSCCH1.
  • the terminal device when the terminal device supports the DMRS pattern and contains additional DMRS, it can receive the second SCI according to the configuration information in the second row of Table 3, shift the position of the last symbol occupied by PSCCH1 by k1 symbols and then receive the second SCI.
  • the terminal device when the terminal device supports HARQ-ACK feedback, it receives the second SCI according to the configuration information in the fourth row, shifts the position of the last symbol occupied by PSCCH1 by k3 symbols and then receives the second SCI.
  • l0 may also indicate the start position of the data channel (for example, the PSSCH data channel) in the time domain, the position of the time domain resources occupied by the DMRS, or the boundary position of the time domain resources.
  • the terminal device can select the maximum value of the symbol positions corresponding to the above three configuration information .
  • the DMRS pattern contains additional DMRS
  • the time domain start position of the second SCI is the 4th character
  • the time domain start position of the second SCI corresponding to HARQ-ACK feedback is the 8th character
  • the 8th symbol can be selected as the time domain of the second SCI starting point.
  • the first indication information includes a resource configuration time domain factor and the reference time domain location.
  • the resource configuration time domain factor corresponds to the reference time domain position.
  • the first control information includes the offset relative to the reference time domain position.
  • the resource configuration time domain factor, the reference time domain position, and the offset relative to the reference time domain position can refer to the above description.
  • the first indication information includes a resource configuration time domain factor and the offset relative to the reference time domain position, wherein the resource configuration time domain factor is relative to the reference time domain position.
  • the first control information includes the reference time domain position.
  • the network device may send the first indication information to the terminal device through high-level signaling, and the high-level signaling may include system broadcast messages, radio resource control (radio resource control, RRC) messages, and so on.
  • RRC radio resource control
  • the terminal device determines a time domain start position of the second control information and a frequency domain start position of the second control information according to the first indication information and the first control information.
  • the time domain start position of the second control information is determined according to the reference time domain position and the offset relative to the reference time domain position. It can include the following options:
  • the terminal device may first determine the currently supported resource configuration time domain factor. For example, the size of the currently supported SCS can be obtained by blindly checking the first SCS, or whether the terminal device supports HARQ-ACK feedback can be obtained from the system configuration. Then, the offset relative to the reference time domain position and the reference time domain position corresponding to the resource configuration time domain factor are searched from the first indication information. For example, if it is determined by blind detection of the first SCS that the size of the CSC currently supported by the terminal device is 120KHz, from the configuration information in row 4 in Table 2 above, it is determined that the offset between the second SCI and PSCCH1 occupying the last symbol position is k3.
  • the terminal device supports HARQ-ACK feedback
  • the offset of the last symbol position occupied by the second SCI and PSCCH1 can be determined from the configuration information in the fourth row of Table 3 as k3.
  • the time domain start position of the second control information is determined according to the offset relative to the reference time domain position and the reference time domain position.
  • the terminal device may first determine the currently supported resource configuration time domain factor, and then search for the reference time domain location corresponding to the resource configuration time domain factor from the first indication information, and then according to The offset relative to the reference time domain position contained in the first control information and the found reference time domain position determine the time domain start position of the second control information. Similar to the above, we will not illustrate them one by one here.
  • the terminal device may first determine the currently supported resource configuration time domain factor, and then search for the resource configuration time domain factor corresponding to the resource configuration time domain factor relative to the reference time domain from the first indication information Position offset, and then determine the time domain start position of the second control information according to the reference time domain position indicated by the first control information and the found offset relative to the reference time domain position.
  • PSCCH1 occupying the last symbol position 10 is indicated by the first SCI, and after receiving the first SCI, the terminal device parses out that PSCCH1 occupies the last symbol position 10.
  • the terminal device determines the time domain start position of the second SCI according to the last symbol position occupied by PSCCH1 and the found offset k3 between the second SCI and the last symbol position occupied by PSCCH1, that is, the last symbol position occupied by PSCCH1
  • the symbol position l0 is shifted backward by the offset k3 relative to the reference time domain position, and the 10+k3+1th symbol position is used as the time domain start position of the PSCCH2 of the second SCI.
  • the network device may map the second control information to the frequency domain start position of the second control information, the number of frequency domain resources occupied by the second control information, and the number of frequency domain resources Frequency domain resources.
  • the frequency domain resource unit may be CCE, subchannel number, resource block (resource block, RB), or resource element (resource element, RE).
  • the first-level SCI indicates that the frequency domain starting position of PSSCH2 is k, and there are N frequency domain resources in total.
  • FIG. 8 is a schematic diagram of PSCCH2 mapping provided by an embodiment of the present application.
  • the first SCI indicates the frequency domain starting position k of the second SCI
  • the second SCI is determined by the above steps.
  • the time domain start position of the SCI is l. Therefore, the frequency domain start position k and the time domain start position l are mapped from bottom to top, and the value of k continues to increase until all PSCCH2 are mapped to the lth symbol.
  • the terminal device may map the second SCI according to the frequency domain resource position occupied by the DMRS. Including the following mapping methods.
  • FIG. 9 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application.
  • On the k+1th RE of the l+1th OFDM symbol there is a DMRS pilot mapping. Therefore, PSCCH2 mapping is not performed on the k+1th RE on the l+1th OFDM symbol, and PSCCH2 is mapped To the kth and k+2th REs of the l+1th OFDM symbol.
  • FIG. 10 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application.
  • FIG. 11 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application.
  • the second control information and the scheduled data channel may be resource mapped in a frequency division multiplexing manner. That is, PSCCH2 preferentially occupies the same frequency domain k position on different symbols. This not only guarantees simple data mapping and demodulation, but also allocates more transmit power on the control channel.
  • the frequency domain resource width occupied by PSCCH2 is R/l
  • 1 is the number of time domain resources that can be occupied by PSCCH2.
  • FIG. 12 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application.
  • the PSCCH2 may be mapped to the N-1th and N-2th frequency domain resources, and the PSSCH may be mapped to the kth to N-3th frequency domain resources.
  • the second control information may be mapped to the middle position of the frequency domain of the data channel.
  • This can reduce the out-of-band leakage of adjacent frequency bands, thereby improving the decoding performance of PSCCH.
  • FIG. 13 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application.
  • the PSCCH2 can be mapped to the k+2 to k+4 frequency domain resources, and the PSSCH can be mapped to other frequency domain resources, and the frequency domain resources occupied by the PSCCH2 are located in the middle of the frequency domain resources occupied by the PSSCH.
  • PSCCH2 occupies X frequency domain resources
  • PSSCH occupies N frequency domain resources
  • the frequency domain starting position is k
  • whether PSCCH2 adopts VRB-to-PRB mapping and interleaving includes the following three methods:
  • PSCCH2 also uses the VRB to PRB mapping process. If PSSCH does not use VRB to PRB mapping, PSCCH2 does not use the VRB to PRB mapping process.
  • PSSCH adopts the VRB to PRB mapping process can be indicated by the SCI or configured by high-level signaling. For example, the VRB to PRB mapping indication is indicated in the SCI, which acts on PSSCH and PSCCH2 at the same time.
  • PSCCH2CCE adopts CCE-to-REG interleaving mapping includes the following three methods:
  • CCE-to-REG interleaving mapping is supported, but whether to perform CCE-to-REG interleaving mapping can be configured by high-level signaling.
  • PSCCH2 does not use the CCE-to-REG interleaving mapping process.
  • the network device sends the second control information to the terminal device.
  • the terminal device may determine the frequency domain start position of the second control information in the following manner: the first control information includes the frequency domain start position of the second control information, and after receiving the first control information, the terminal device may According to the frequency domain starting position of the second control information contained in the first control information.
  • the terminal device obtains the frequency domain start position of the first control information through blind detection; and then uses the frequency domain start position of the first control information as the frequency domain start position of the second control information .
  • the terminal device receives the second control information sent by the network device according to the time domain start position of the second control information and the frequency domain start position of the second control information. Finally, according to the received first control information and second control information, the data channel sent by the network device is received.
  • the terminal device determines the second control information according to at least one of the size of the subcarrier spacing, the configuration of the additional DMRS in the demodulation reference signal, and the feedback of the confirmation information of the hybrid automatic feedback retransmission.
  • the start position of the time domain Not only the flexibility of the resource indication of the second control information is improved, but the second control information that can be correctly received can be effectively used as the receiving pilot of the data channel, thereby improving the receiving performance of the data channel.
  • the frequency domain information of the second control information is indicated, so that the terminal device can correctly receive the second control information.
  • FIG. 14 is a schematic structural diagram of a resource indicating device provided by an embodiment of the present application.
  • the device may include a receiving module 1401 and a processing module 1402, wherein the detailed description of each module is as follows.
  • the receiving module 1401 is configured to receive first instruction information and first control information sent by a network device;
  • the processing module 1402 is configured to determine the time domain start position of the second control information and the frequency domain start position of the second control information according to the first indication information and the first control information;
  • the receiving module 1401 is further configured to receive the second control information sent by the network device according to the time domain start position of the second control information and the frequency domain start position of the second control information.
  • the time domain start position of the second control information is determined according to a reference time domain position and an offset relative to the reference time domain position.
  • the first indication information includes the offset relative to the reference time domain position.
  • the first indication information includes time domain information and frequency domain information.
  • the time domain information includes the reference time domain position
  • the reference time domain position includes the last symbol position of the first control information, the first symbol position of the first control information, and the position of the data channel. At least one of the first symbol position, the first symbol position of the demodulation reference signal DMRS, and the boundary position of the time domain resource;
  • the frequency domain information includes a reference frequency domain position, and the reference frequency domain position includes at least one of a frequency domain start position of the first control information, a frequency domain start position of a control channel, and a frequency domain center position of a data channel.
  • the reference frequency domain position includes at least one of a frequency domain start position of the first control information, a frequency domain start position of a control channel, and a frequency domain center position of a data channel.
  • the first indication information further includes resource configuration time-domain factors
  • the resource configuration time-domain factors include the size of the subcarrier spacing SCS, the configuration of additional DMRS in the demodulation reference signal DMRS mode, and hybrid automatic feedback retransmission. Confirm at least one of the feedback status of the information.
  • the processing module 1402 is further configured to determine the currently supported resource configuration time domain factor; find the relative time domain factor corresponding to the resource configuration time domain factor from the first indication information Domain position offset and the reference time domain position; determine the time domain start position of the second control information according to the offset relative to the reference time domain position and the reference time domain position .
  • the first control information includes the frequency domain start position of the second control information.
  • the processing module 1402 is further configured to obtain the frequency domain start position of the first control information through blind detection; use the frequency domain start position of the first control information as the frequency domain of the second control information. The starting position of the domain.
  • each module can also refer to the corresponding description of the method embodiment shown in FIG. 7 to execute the methods and functions performed by the terminal device in the foregoing embodiment.
  • FIG. 15 is a schematic structural diagram of another resource indicating device provided by an embodiment of the present application.
  • the device may include a sending module 1501 and a processing module 1502, wherein the detailed description of each module is as follows.
  • the sending module 1501 is configured to send first indication information and first control information to a terminal device, where the first indication information and the first control information are used by the terminal device to determine the time domain start position of the second control information And the frequency domain start position of the second control information, the time domain start position of the second control information and the frequency domain start position of the second control information are used by the terminal device to receive the network device The second control information sent.
  • the time domain start position of the second control information is determined according to the reference time domain position and the offset relative to the reference time domain position.
  • the first indication information includes the offset relative to the reference time domain position.
  • the first indication information includes time domain information and frequency domain information.
  • the time domain information includes the reference time domain position
  • the reference time domain position includes the last symbol position of the first control information, the first symbol position of the first control information, and the position of the data channel. At least one of the first symbol position, the first symbol position of the demodulation reference signal DMRS, and the boundary position of the time domain resource;
  • the frequency domain information includes a reference frequency domain position, and the reference frequency domain position includes at least one of a frequency domain start position of the first control information, a frequency domain start position of a control channel, and a frequency domain center position of a data channel.
  • the reference frequency domain position includes at least one of a frequency domain start position of the first control information, a frequency domain start position of a control channel, and a frequency domain center position of a data channel.
  • the first indication information further includes resource configuration time-domain factors
  • the resource configuration time-domain factors include the size of the subcarrier spacing SCS, the configuration of additional DMRS in the demodulation reference signal DMRS mode, and hybrid automatic feedback retransmission. Confirm at least one of the feedback status of the information.
  • the first control information includes the frequency domain starting position of the second control information.
  • the processing module 1502 is configured to control the second control information according to the frequency domain start position of the second control information, the number of frequency domain resources occupied by the second control information, and the number of frequency domain resources.
  • the information is mapped to frequency domain resources.
  • the processing module 1502 is further configured to obtain the frequency domain resource position occupied by the DMRS; and map the second control information according to the frequency domain resource position occupied by the DMRS.
  • each module can also refer to the corresponding description of the method embodiment shown in FIG. 7 to execute the method and function performed by the network device in the above embodiment.
  • FIG. 16 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • the terminal device may include: at least one processor 1601, at least one communication interface 1602, at least one memory 1603, and at least one communication bus 1604.
  • the processor 1601 may be a central processing unit, a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of this application.
  • the processor may also be a combination that implements computing functions, for example, a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on.
  • the communication bus 1604 may be a standard PCI bus for interconnecting peripheral components or an extended industry standard structure EISA bus. The bus can be divided into an address bus, a data bus, a control bus, and so on.
  • the communication bus 1604 is used to implement connection and communication between these components.
  • the communication interface 1602 of the device in the embodiment of the present application is used for signaling or data communication with other node devices.
  • the memory 1603 may include volatile memory, such as nonvolatile random access memory (NVRAM), phase change RAM (PRAM), magnetoresistive random access memory (magetoresistive) RAM, MRAM), etc., may also include non-volatile memory, such as at least one disk storage device, electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), flash memory devices, such as reverse or flash memory (NOR flash memory) or NAND flash memory (NAND flash memory), semiconductor devices, such as solid state disk (SSD), etc.
  • the memory 1603 may also be at least one storage device located far away from the foregoing processor 1601.
  • the memory 1603 may also store a set of program codes, and the processor 1601 may optionally also execute programs executed in the memory 1603.
  • the time domain start position of the second control information is determined according to the reference time domain position and the offset relative to the reference time domain position.
  • the first indication information includes the offset relative to the reference time domain position.
  • the first indication information includes time domain information and frequency domain information.
  • the time domain information includes the reference time domain position
  • the reference time domain position includes the last symbol position of the first control information, the first symbol position of the first control information, and the position of the data channel. At least one of the first symbol position, the first symbol position of the demodulation reference signal DMRS, and the boundary position of the time domain resource;
  • the frequency domain information includes a reference frequency domain position, and the reference frequency domain position includes at least one of a frequency domain start position of the first control information, a frequency domain start position of a control channel, and a frequency domain center position of a data channel.
  • the reference frequency domain position includes at least one of a frequency domain start position of the first control information, a frequency domain start position of a control channel, and a frequency domain center position of a data channel.
  • the first indication information further includes resource configuration time-domain factors
  • the resource configuration time-domain factors include the size of the subcarrier spacing SCS, the configuration of additional DMRS in the demodulation reference signal DMRS mode, and hybrid automatic feedback retransmission. Confirm at least one of the feedback status of the information.
  • processor 1601 is further configured to perform the following operations:
  • the first control information includes the frequency domain starting position of the second control information.
  • processor 1601 is further configured to perform the following operations:
  • the frequency domain starting position of the first control information is used as the frequency domain starting position of the second control information.
  • the processor may also cooperate with the memory and the communication interface to perform the operation of the terminal device in the above-mentioned application embodiment.
  • FIG. 17 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • the network device may include: at least one processor 1701, at least one communication interface 1702, at least one memory 1703, and at least one communication bus 1704.
  • the processor 1701 may be various types of processors mentioned above.
  • the communication bus 1704 may be a standard PCI bus for interconnecting peripheral components or an extended industry standard structure EISA bus. The bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of representation, only one thick line is used in FIG. 17, but it does not mean that there is only one bus or one type of bus.
  • the communication bus 1704 is used to implement connection and communication between these components. Among them, the communication interface 1702 of the device in the embodiment of the present application is used for signaling or data communication with other node devices.
  • the memory 1703 may be the various types of memories mentioned above. Optionally, the memory 1703 may also be at least one storage device located far away from the foregoing processor 1701.
  • the memory 1703 stores a set of program codes, and the processor 1701 executes the programs in the memory 1703.
  • the frequency domain start position of the information, the time domain start position of the second control information and the frequency domain start position of the second control information are used by the terminal device to receive the second signal sent by the network device. Control information.
  • the time domain start position of the second control information is determined according to the reference time domain position and the offset relative to the reference time domain position.
  • the first indication information includes the offset relative to the reference time domain position.
  • the first indication information includes time domain information and frequency domain information.
  • the time domain information includes the reference time domain position
  • the reference time domain position includes the last symbol position of the first control information, the first symbol position of the first control information, and the position of the data channel. At least one of the first symbol position, the first symbol position of the demodulation reference signal DMRS, and the boundary position of the time domain resource;
  • the frequency domain information includes a reference frequency domain position, and the reference frequency domain position includes at least one of a frequency domain start position of the first control information, a frequency domain start position of a control channel, and a frequency domain center position of a data channel.
  • the reference frequency domain position includes at least one of a frequency domain start position of the first control information, a frequency domain start position of a control channel, and a frequency domain center position of a data channel.
  • the first indication information further includes resource configuration time-domain factors
  • the resource configuration time-domain factors include the size of the subcarrier spacing SCS, the configuration of additional DMRS in the demodulation reference signal DMRS mode, and hybrid automatic feedback retransmission. Confirm at least one of the feedback status of the information.
  • the first control information includes the frequency domain starting position of the second control information.
  • processor 1601 is further configured to perform the following operations:
  • the second control information is mapped to the frequency domain resource according to the frequency domain start position of the second control information, the number of frequency domain resources occupied by the second control information, and the number of frequency domain resources.
  • processor 1701 is further configured to perform the following operations:
  • the second control information is mapped according to the frequency domain resource position occupied by the DMRS.
  • processor may also cooperate with the memory and the communication interface to perform the operation of the network device in the above-mentioned application embodiment.
  • the embodiments of the present application also provide a chip system, which includes a processor, which is used to support terminal devices or network devices to implement the functions involved in any of the above embodiments, such as generating or processing the functions involved in the above methods. Data and/or information.
  • the chip system may further include a memory, and the memory is used for necessary program instructions and data for terminal devices or network devices.
  • the chip system can be composed of chips, or include chips and other discrete devices.
  • the embodiments of the present application also provide a processor, which is configured to be coupled with a memory and configured to execute any method and function involving a terminal device or a network device in any of the foregoing embodiments.
  • the embodiments of the present application also provide a computer program product, which when running on a computer, enables the computer to execute any method and function involving a terminal device or a network device in any of the foregoing embodiments.
  • the embodiment of the present application also provides a communication device, which is used to execute any method and function related to a terminal device or a network device in any of the foregoing embodiments.
  • An embodiment of the present application also provides a communication system, which includes at least one terminal device and at least one network device involved in any of the foregoing embodiments.
  • the computer may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

Abstract

Certains modes de réalisation de la présente demande portent sur un procédé d'indication de ressource et sur un dispositif associé. Le procédé d'indication de ressource consiste : à recevoir, par un dispositif terminal, des premières informations d'indication et des premières informations de commande envoyées par un dispositif de réseau ; à déterminer une position de départ dans le domaine temporel et une position de départ dans le domaine fréquentiel de secondes informations de commande en fonction des premières informations d'indication et des premières informations de commande ; à recevoir les secondes informations de commande envoyées par le dispositif de réseau en fonction de la position de départ dans le domaine temporel et de la position de départ dans le domaine fréquentiel des secondes informations de commande. Selon les modes de réalisation de la présente demande, la flexibilité d'indication de canaux de commande ainsi que la performance de démodulation de signal peuvent être améliorées.
PCT/CN2019/114501 2019-10-30 2019-10-30 Procédé d'indication de ressource et dispositif associé WO2021081852A1 (fr)

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