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WO2023011208A1 - Procédé et appareil de décalage de fréquence de relais - Google Patents

Procédé et appareil de décalage de fréquence de relais Download PDF

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Publication number
WO2023011208A1
WO2023011208A1 PCT/CN2022/107114 CN2022107114W WO2023011208A1 WO 2023011208 A1 WO2023011208 A1 WO 2023011208A1 CN 2022107114 W CN2022107114 W CN 2022107114W WO 2023011208 A1 WO2023011208 A1 WO 2023011208A1
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Prior art keywords
frequency
signal
equal
frequency shift
shift value
Prior art date
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PCT/CN2022/107114
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English (en)
Chinese (zh)
Inventor
颜矛
刘凤威
马传辉
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication date
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Publication of WO2023011208A1 publication Critical patent/WO2023011208A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations

Definitions

  • the present application relates to the technical field of communication, and in particular to a method and device for frequency shifting of a relay.
  • a relatively simple method uses a relay to assist the communication between the terminal and the base station.
  • the working process includes: during the downlink transmission process, the base station sends a downlink signal to the relay device, and the relay device forwards the downlink signal to the terminal.
  • the terminal sends an uplink signal to the relay device, and the relay device forwards the uplink signal to the base station.
  • the relay device can change the frequency of the uplink signal or the downlink signal. How to determine the frequency shift value of the relay device is a problem to be solved in this application.
  • the frequency shift value refers to the frequency of the signal received by the relay device. Frequency, the difference from the frequency of the retransmitted signal.
  • the present application provides a relay frequency shifting method and device to determine a frequency shifting value of a relay device.
  • a relay frequency shifting method is provided, the method is executed by a network device, or may be a component (processor, chip, circuit or others) configured in the network device, or may be a software module, etc. , including: determining the frequency shift value of the first signal according to the frequency range corresponding to the first signal or the global synchronization channel number (global synchronization channel number, GSCN) range, and the frequency shift value refers to the first signal received by the relay device Frequency, the difference between the frequency and the frequency of the first signal sent by the relay device; sending indication information of the frequency shift value to the relay device.
  • GSCN global synchronization channel number
  • a relay frequency shifting method is provided.
  • the execution body of the method is a relay device, or it may be a component (processor, chip, circuit or others) configured in the relay device, or it may be a software A module, including: receiving indication information of a frequency shift value from a network device, where the frequency shift value refers to the difference between the frequency of the first signal received by the relay device and the frequency of the first signal sent by the relay device value; perform frequency shift on the first signal according to the frequency shift value.
  • both the frequency of the first signal before the frequency shift and the frequency of the first signal after the frequency shift are located on the GSCN.
  • the first frequency range includes 0 to 3000 MHz, and the frequency of the first signal
  • the frequency shift value satisfies the following formula:
  • said N 1 is an integer greater than or equal to -2499 and less than or equal to 2499, said M 1 ⁇ -5,-3,-1,1,3,5 ⁇ ; or,
  • the unit of the frequency shift value is a resource element or a subcarrier
  • the N 1 is an integer greater than or equal to -2499 and less than or equal to 2499
  • the unit of the frequency shift value is a resource block
  • the N 1 is an integer greater than or equal to -833 and less than or equal to 833
  • the ⁇ represents the subcarrier spacing index of the first signal
  • the second frequency range includes 3000 to 24250 MHz, and the frequency of the first signal
  • the frequency shift value satisfies the following formula:
  • the N1 is an integer greater than or equal to -14756 and less than or equal to 14756; or,
  • the unit of the frequency shift value is a resource element or a subcarrier
  • the N 1 is an integer less than or equal to -14756 and greater than or equal to 14756
  • the ⁇ Indicates the subcarrier spacing index of the first signal; or,
  • the unit of the frequency shift value is a resource block
  • the N 1 is an integer greater than or equal to -14756 and less than or equal to 14756
  • the ⁇ represents the subcarrier spacing index of the first signal
  • the third frequency range includes 24250 to 100000 MHz, and the frequency of the first signal
  • the frequency shift value satisfies the following formula:
  • the N1 is an integer greater than or equal to -4383 and less than or equal to 4383; or,
  • the unit of the frequency shift value is a resource element or a subcarrier
  • the N 1 is an integer greater than or equal to -4383 and less than or equal to 4383
  • the ⁇ Indicates the subcarrier spacing index of the first signal
  • the unit of the frequency shift value is a resource block
  • the N 1 is an integer greater than or equal to -4383 and less than or equal to 4383
  • the ⁇ represents the The subcarrier spacing index of the first signal.
  • the first GSCN range includes GSCNs with indexes from 2 to 7498, and the first GSCN
  • the frequency shift value of a signal satisfies the following formula:
  • said N1 is an integer greater than or equal to -7499 and less than or equal to 7499; or,
  • the second GSCN range includes GSCNs with indexes from 7499 to 22255, the The frequency shift value of the first signal satisfies the following formula:
  • the N1 is an integer greater than or equal to -14756 and less than or equal to 14756; or,
  • the third GSCN range includes GSCNs with indexes from 22256 to 26639, the The frequency shift value of the first signal satisfies the following formula:
  • the N1 is an integer greater than or equal to -4383 and less than or equal to 4383.
  • the first frequency range includes 0 to 3000 MHz, and the first frequency range includes 0 to 3000 MHz, and the first frequency range includes 0 to 3000 MHz.
  • the second frequency range includes 3000 to 24250 MHz, and the frequency shift value of the first signal satisfies the following formula:
  • said N 1 is an integer greater than or equal to 1 and less than or equal to 2499
  • said N2 is an integer greater than or equal to 0 and less than or equal to 2499
  • M 1 ⁇ ⁇ 1,3,5 ⁇ or
  • the unit of the frequency shift value is a resource element or a subcarrier
  • the N1 is an integer greater than or equal to 1 and less than or equal to 2499
  • the N2 is an integer greater than or equal to 0 and less than or equal to 2499
  • the K1 and K2 are integers, or
  • the ⁇ 1 is the subcarrier spacing index of the first signal
  • the ⁇ 2 is the subcarrier spacing index of the second signal; or
  • the third frequency range includes 24250 to 100000 MHz, and the shifted frequency of the first signal
  • the frequency value satisfies the following formula:
  • said N 1 is an integer greater than or equal to 1 and less than or equal to 2499
  • said N 2 is an integer greater than or equal to 0 and less than or equal to 4383
  • M 1 ⁇ ⁇ 1,3,5 ⁇ or
  • the unit of the frequency shift value is a resource element or a subcarrier
  • the N 1 is an integer greater than or equal to 1 and less than or equal to 2499
  • the N 2 is an integer greater than or equal to 0 and less than or equal to 4388
  • the K2 is an integer
  • the ⁇ 2 is the subcarrier spacing index of the second signal; or,
  • the frequency shift value of the first signal satisfies the following formula:
  • said N1 is an integer greater than or equal to 0 and less than or equal to 2499
  • said N2 is an integer greater than or equal to 0 and less than or equal to 4383; or
  • the unit of the frequency shift value is a resource element or a subcarrier
  • the N 1 is an integer greater than or equal to 0 and less than or equal to 2499
  • the N 2 is an integer greater than or equal to 0 and less than or equal to 4383
  • the K1 and K2 are integers, or
  • the ⁇ 1 is the subcarrier spacing index of the first signal
  • the ⁇ 2 is the subcarrier spacing index of the second signal.
  • the frequency of the first signal before the frequency shift is not on the GSCN, and the frequency of the first signal after the frequency shift is on the GSCN.
  • the frequency of the first signal before the frequency shift and the frequency of the first signal after the frequency shift belong to the same frequency range.
  • the conditions to be met by the first signal before the frequency shift can be referred to as follows.
  • the first frequency range includes 0 to 3000 MHz, and the frequency of the first signal before the frequency shift satisfies the following formula:
  • the N bs is an integer greater than or equal to 1 and less than or equal to 2498, the M bs ⁇ 1,3,5 ⁇ ,
  • the K bs is an integer greater than or equal to 1 and less than or equal to 80; or,
  • the second frequency range includes 3000 to 24250 MHz, and the frequency of the first signal before the frequency shift satisfies the following formula:
  • the N bs is an integer greater than or equal to 0 and less than or equal to 14755, and the K bs is an integer greater than or equal to 1 and less than or equal to 96; or,
  • the third frequency range includes 24250 to 100000 MHz, and the frequency of the first signal before the frequency shift satisfies the following formula:
  • the N bs is an integer greater than or equal to 0 and less than or equal to 4382, and the K bs is an integer greater than or equal to 1 and less than or equal to 288.
  • the first frequency range includes 0 to 3000 MHz, and the frequency of the first signal
  • the frequency shift value satisfies the following formula:
  • said N 1 is an integer greater than or equal to -2499 and less than or equal to 2499
  • said K 1 is an integer greater than or equal to -80 and less than or equal to 80
  • the second frequency range includes 3000 to 24250 MHz, and the frequency of the first signal
  • the frequency shift value satisfies the following formula:
  • said N 1 is an integer greater than or equal to -14756 and less than or equal to 14756
  • said K 1 is an integer greater than or equal to -96 and less than or equal to 96; or
  • the third frequency range includes 24250 to 100000 MHz, and the frequency of the first signal
  • the frequency shift value satisfies the following formula:
  • the N 1 is an integer greater than or equal to -4383 and less than or equal to 4383
  • the K 1 is an integer greater than or equal to -288 and less than or equal to 288.
  • the frequency of the first signal before the frequency shift and the frequency of the first signal after the frequency shift belong to different frequency ranges.
  • the conditions to be satisfied by the frequency shift value of the first signal can be referred to as follows.
  • the first frequency range includes 0 to 3000 MHz
  • the The second frequency range includes 3000 to 24250 MHz
  • the frequency shift value of the first signal satisfies the following formula:
  • said N1 is an integer greater than or equal to 1 and less than or equal to 2499
  • said N2 is an integer greater than or equal to 0 and less than or equal to 2499
  • said K1 is greater than or equal to -80, less than or equal to an integer of 80, said M 1 ⁇ ⁇ 1,3,5 ⁇ ; or,
  • the third frequency range includes 24250 to 100000 MHz , the frequency shift value of the first signal satisfies the following formula:
  • said N1 is an integer greater than or equal to 1 and less than or equal to 2499
  • said N2 is an integer greater than or equal to 0 and less than or equal to 4383
  • said K1 is greater than or equal to -1152, less than or equal to an integer of 1152, the M 1 ⁇ ⁇ 1,3,5 ⁇ ; or,
  • the frequency shift value of the first signal satisfies The following conditions:
  • said N1 is an integer greater than or equal to 0 and less than or equal to 2499
  • said N2 is an integer greater than or equal to 0 and less than or equal to 4383
  • said K1 is greater than or equal to -1152 and less than or equal to An integer of 1152.
  • the frequency shifted first signal can be located on the GSCN, and the success rate of receiving the first signal by the terminal can be improved.
  • the first signal is a synchronization signal/physical broadcast channel block (synchronization signal/physical broadcast channel block, SSB)
  • the terminal can be normally accessed to the network.
  • a relay frequency shifting method is provided, the method is executed by a network device, or may be a component (processor, chip, circuit or others) configured in the network device, or may be a software module, etc.
  • the method includes: determining a frequency shift value of the first signal according to the first mapping relationship, where the frequency shift value is a difference between a frequency of the first signal received by the relay device and a frequency of the first signal sent by the relay device; Sending the indication information of the frequency shift value to the relay device, the first mapping relationship satisfies the following formula:
  • the f ⁇ represents the frequency shift value of the first signal
  • the unit of the f ⁇ is a resource element or a subcarrier
  • the k is an integer
  • the f ⁇ represents the frequency shift value of the first signal
  • the unit of the f ⁇ is a resource block
  • the k is an integer
  • a relay frequency shifting method the execution body of the method is a relay device, or it may be a component (processor, chip, circuit or others) configured in the relay device, or it may be a software
  • the module includes: receiving indication information of a frequency shift value from the network device, where the frequency shift value is the difference between the frequency of the first signal received by the relay device and the frequency of the first signal sent; according to the The frequency shift value is used to shift the frequency of the first signal from the network device, and the mapping relationship of the frequency shift value satisfies the following formula:
  • the f ⁇ represents the frequency shift value of the first signal
  • the unit of the f ⁇ is a resource element or a subcarrier
  • the k is an integer
  • the f ⁇ represents the frequency shift value of the first signal
  • the unit of the f ⁇ is a resource block
  • the k is an integer
  • the receiving end does not need to perform additional phase compensation, which simplifies subsequent operations after frequency shifting. It can be understood that when the first signal is an uplink signal, the receiving end is a base station, and when the first signal is a downlink signal, the receiving end is a terminal.
  • the frequency shift value is associated with a bandwidth of a control resource set of a type 0 physical downlink control channel (physical downlink control channel, PDCCH) common search space (common search space, CSS).
  • PDCCH physical downlink control channel
  • common search space common search space
  • the relay device or terminal can determine the size of the frequency shift value according to the above bandwidth, without configuring the frequency shift value to the relay device or terminal separately, saving signaling overhead.
  • it also includes: determining the absolute frequency of the first signal after the frequency shift, and the absolute frequency of the first signal after the frequency shift satisfies the following formula:
  • F REF F REF-Offs + ⁇ F Global (N REF –N REF-Offs –N REF-Shift )
  • the F REF represents the absolute frequency of the first signal
  • the F REF-Offs represents the frequency starting point of the first signal
  • the ⁇ F Global represents the frequency granularity of the first signal
  • the N REF Indicates the serial number of the first signal
  • the N REF-Offs indicates the frequency start number of the first signal
  • the N REF-Shift indicates a parameter related to the frequency shift value.
  • a relay frequency shifting method is provided, and the execution body of the method is a relay device, or may be a component (processor, chip, circuit or others) configured in the relay device, or may be a software
  • the module includes: the relay device determines the magnitude of the frequency shift value according to the conditions satisfied by the frequency shift value; for the conditions satisfied by the frequency shift value, please refer to any one of the first to fourth aspects above.
  • the relay device performs frequency shift on the first signal according to the determined magnitude of the frequency shift value.
  • the frequency-shifted first signal may be located on the GSCN, so as to increase the probability that the receiving end successfully receives the first signal.
  • the relay device independently determines the size of the frequency shift value according to the conditions that the frequency shift value needs to meet, without further notification from the base station, which saves signaling overhead.
  • the main body of the method is a network device, or it may be a component (processor, chip, circuit or others) configured in the network device, or it may be a software module , including: the network device pre-stores the mapping relationship between the frequency range and the frequency shift value, or stores the mapping relationship between the GSCN range and the frequency shift value.
  • the mapping relationship between the frequency range and the frequency shift value or the mapping relationship between the GSCN range and the frequency shift value
  • the formula described in the first aspect or the second aspect above may be satisfied.
  • Different frequency ranges or GSCN ranges may correspond to different frequency shift values. The following describes by taking the mapping relationship between the stored frequency range and the frequency shift value as an example.
  • the network device can determine the frequency range corresponding to the first signal to be sent, which can be called the target frequency range; and determine the target frequency shift value according to the target frequency range and the mapping relationship between the frequency range and the frequency shift value.
  • the target frequency shift value is a frequency shift value of the first signal; the network device sends indication information of the frequency shift value of the first signal to the terminal device.
  • a relay frequency shifting method the execution body of the method is a relay device, or it may be a component (processor, chip, circuit or others) configured in the relay device, or it may be a software
  • the module includes: the mapping relationship between the frequency range and the frequency shift value is pre-stored in the relay device, or the mapping relationship between the GSCN range and the frequency shift value is stored.
  • the mapping relationship between the frequency range and the frequency shift value or the mapping relationship between the GSCN range and the frequency shift value
  • the formula described in the first aspect or the second aspect above may be satisfied. Different frequency ranges or GSCN ranges may correspond to different frequency shift values. The following describes by taking the mapping relationship between the stored frequency range and the frequency shift value as an example.
  • the relay device When the relay device receives the first signal from the network device, it determines the frequency range corresponding to the first signal, which can be called the target frequency range; according to the target frequency range and the mapping relationship between the frequency range and the frequency shift value, the target frequency shift value is determined . Perform frequency shift on the first signal according to the target frequency shift value.
  • a communication device which includes a one-to-one corresponding unit or module for performing the method/operation/step/action described in the first aspect, the third aspect, the fifth aspect or the sixth aspect, the unit Or the module can be a hardware circuit, also can be software, also can be realized by combining hardware circuit with software.
  • a communication device includes a processor and a memory.
  • the memory is used to store computer programs or instructions
  • the processor is coupled to the memory; when the processor executes the computer programs or instructions, the device is made to execute the method of the first aspect, the third aspect, the fifth aspect or the sixth aspect.
  • a communication device in a tenth aspect, includes a processor, and the processor can implement the method described in the first aspect, the third aspect, the fifth aspect, or the sixth aspect.
  • the device may also include a communication interface for the device to communicate with other devices.
  • the communication interface may be a transceiver, a circuit, a bus, a module, a pin or other types of communication interfaces, and the other device may be a relay device or the like.
  • a communication device in the eleventh aspect, includes a one-to-one corresponding unit or module for performing the method/operation/step/action described in the second aspect, the fourth aspect, or the seventh aspect, and the unit or module It may be a hardware circuit, or software, or a combination of hardware circuit and software.
  • a communication device includes a processor and a memory.
  • the memory is used to store computer programs or instructions
  • the processor is coupled to the memory; when the processor executes the computer programs or instructions, the device is made to execute the method of the second aspect, the fourth aspect, or the seventh aspect.
  • a thirteenth aspect provides a communication device, the device includes a processor, and the processor can implement the method described in the second aspect, the fourth aspect, or the seventh aspect.
  • the device may also include a communication interface for the device to communicate with other devices.
  • the communication interface may be a transceiver, a circuit, a bus, a module, a pin or other types of communication interfaces, and other devices may be network devices and the like.
  • a computer-readable storage medium where a computer program or instruction is stored in the computer-readable storage medium, and when the computer program or instruction is executed by a device, the device executes the first aspect and the third aspect above , the method of the fifth aspect or the sixth aspect.
  • a fifteenth aspect provides a computer-readable storage medium, the computer-readable storage medium stores computer programs or instructions, and when the computer programs or instructions are executed by a device, the device executes the above-mentioned second aspect and the fourth aspect , or the method of the seventh aspect.
  • a computer program product includes a computer program or an instruction, and when the computer program or instruction is executed by a device, the device executes the first aspect, the third aspect, the fifth aspect or the first aspect six methods.
  • a computer program product includes a computer program or an instruction, and when the computer program or instruction is executed by a device, the device executes the above-mentioned second aspect, the fourth aspect, or the seventh aspect method.
  • a system which includes the device of any one of the eighth aspect to the tenth aspect, and the device of any one of the eleventh aspect to the thirteenth aspect.
  • Fig. 1 is a schematic diagram of the architecture of the mobile communication system used in the present application.
  • FIG. 2 is a schematic diagram of relay communication provided by the present application.
  • FIG. 3 is a schematic diagram of the same-frequency amplification and forwarding provided by the present application.
  • FIG. 4 is a schematic diagram of downlink frequency shift amplification and forwarding provided by the present application.
  • FIG. 5 is a schematic diagram of uplink frequency shift amplification and forwarding provided by the present application.
  • FIG. 6 is a schematic diagram of the SSB provided by the present application.
  • FIG. 7 is a flow chart of the relay frequency shifting method provided by the present application.
  • FIG. 8 is a flow chart of NR initial access provided by this application.
  • Figure 9a is a schematic diagram of SSBs on the GSCN before and after the frequency shift provided by the present application.
  • Figure 9b is a schematic diagram of the SSB not on the GSCN before the frequency shift and the SSB on the GSCN after the frequency shift provided by this application;
  • FIG. 10 is another flow chart of the relay frequency shifting method provided by the present application.
  • Fig. 11 and Fig. 12 are the schematic diagrams of the device provided by the present application.
  • FIG. 13 is a schematic diagram of a base station provided in an embodiment of the present application.
  • FIG. 14 is a schematic diagram of a relay device provided by an embodiment of the present application.
  • FIG. 1 is a schematic structural diagram of a communication system 1000 applied in the present application.
  • the communication system includes a radio access network 100 and a core network 200 , and optionally, the communication system 1000 may also include the Internet 300 .
  • the radio access network 100 may include at least one radio access network device (such as 110a and 110b in FIG. 1 ), and may also include at least one terminal (such as 120a-120j in FIG. 1 ).
  • the terminal is connected to the wireless access network device in a wireless manner, and the wireless access network device is connected to the core network in a wireless or wired manner.
  • the core network equipment and the wireless access network equipment can be independent and different physical equipment, or the functions of the core network equipment and the logical functions of the wireless access network equipment can be integrated on the same physical equipment, or it can be a physical equipment It integrates some functions of core network equipment and some functions of wireless access network equipment. Terminals and wireless access network devices may be connected to each other in a wired or wireless manner.
  • FIG. 1 is only a schematic diagram.
  • the communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG. 1 .
  • the radio access network equipment can be a base station (base station), an evolved base station (evolved NodeB, eNodeB), a transmission reception point (transmission reception point, TRP), and the next generation in the fifth generation (5th generation, 5G) mobile communication system
  • Base station (next generation NodeB, gNB), the next generation base station in the sixth generation (6th generation, 6G) mobile communication system, the base station in the future mobile communication system or the access node in the wireless fidelity (wireless fidelity, WiFi) system etc.; it can also be a module or unit that completes some functions of the base station, for example, it can be a centralized unit (central unit, CU) or a distributed unit (distributed unit, DU).
  • the CU here completes the functions of the base station's radio resource control (radio resource control, RRC) protocol and packet data convergence protocol (PDCP), and can also complete the service data adaptation protocol (service data adaptation protocol, SDAP)
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • SDAP service data adaptation protocol
  • the function; the DU completes the functions of the radio link control (radio link control, RLC) layer and medium access control (medium access control, MAC) layer of the base station, and can also complete part of the physical (PHY) layer or all physical layers.
  • RLC radio link control
  • MAC medium access control
  • PHY physical
  • the radio access network device may be a macro base station (such as 110a in Figure 1), a micro base station or an indoor station (such as 110b in Figure 1), or a relay node or a donor node.
  • This application does not limit the specific technology and specific equipment form adopted by the wireless access network equipment.
  • a base station is used as an example of a radio access network device for description below.
  • a terminal may also be called terminal equipment, user equipment (user equipment, UE), mobile station, mobile terminal, and so on.
  • Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things ( internet of things, IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearables, smart transportation, smart city, etc.
  • Terminals can be mobile phones, tablet computers, computers with wireless transceiver functions, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc. This application does not limit the specific technology and specific equipment form adopted by the terminal.
  • UE is used as an example of a terminal for description below.
  • Base stations and terminals can be fixed or mobile. Base stations and terminals can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and artificial satellites in the air. This application does not limit the application scenarios of the base station and the terminal.
  • the helicopter or UAV 120i in FIG. base station for base station 110a, 120i is a terminal, that is, communication between 110a and 120i is performed through a wireless air interface protocol.
  • communication between 110a and 120i may also be performed through an interface protocol between base stations.
  • 120i compared to 110a, 120i is also a base station. Therefore, both the base station and the terminal can be collectively referred to as a communication device, 110a and 110b in FIG. 1 can be referred to as a communication device with a base station function, and 120a-120j in FIG. 1 can be referred to as a communication device with a terminal function.
  • the communication between the base station and the terminal, between the base station and the base station, and between the terminal and the terminal can be carried out through the licensed spectrum, the communication can also be carried out through the unlicensed spectrum, and the communication can also be carried out through the licensed spectrum and the unlicensed spectrum at the same time; Communications may be performed on frequency spectrums below megahertz (gigahertz, GHz), or communications may be performed on frequency spectrums above 6 GHz, or communications may be performed using both frequency spectrums below 6 GHz and frequency spectrums above 6 GHz. This application does not limit the frequency spectrum resources used by wireless communication.
  • the functions of the base station may also be performed by modules (such as chips) in the base station, or may be performed by a control subsystem including the functions of the base station.
  • the control subsystem including base station functions here may be the control center in the above application scenarios such as smart grid, industrial control, intelligent transportation, and smart city.
  • the functions of the terminal may also be performed by a module (such as a chip or a modem) in the terminal, or may be performed by a device including the terminal function.
  • the base station sends a downlink signal or downlink information to the terminal, and the downlink information is carried on the downlink channel;
  • the terminal sends an uplink signal or uplink information to the base station, and the uplink information is carried on the uplink channel.
  • the terminal needs to establish a wireless connection with the cell controlled by the base station.
  • the cell with which a terminal has established a wireless connection is called the serving cell of the terminal.
  • the serving cell When the terminal communicates with the serving cell, it will also be interfered by signals from neighboring cells.
  • a relay device may be used to assist the communication between the base station and the UE.
  • the relay method may include same-frequency amplifying and forwarding (see FIG. 3 ), and frequency-shifting amplifying and forwarding (see FIG. 4 and FIG. 5 ). In the same-frequency amplification and forwarding, the relay device directly amplifies the received signal and forwards it without changing the frequency of the signal. For example, as shown in FIG. 3
  • the original signal sent by the base station or UE is located at frequency f 0 , and after being forwarded by the relay device, the signal is also located at frequency f 0 .
  • the relay device can change the frequency of the received signal. For example, in downlink transmission, as shown in FIG. 4 , the downlink signal sent by the base station is located at f 0 , and the relay device can shift the frequency of the downlink signal from f 0 to f rn . The relay device sends a downlink signal to the UE at frequency f rn .
  • FIG. 4 the downlink signal sent by the base station is located at f 0 , and the relay device can shift the frequency of the downlink signal from f 0 to f rn .
  • the relay device sends a downlink signal to the UE at frequency f rn .
  • the uplink signal sent by the UE is located at f 0 , and the relay device can shift the frequency of the uplink signal from f 0 to f rn .
  • the relay device sends the uplink signal to the base station at frequency f rn .
  • the same-frequency amplification and forwarding may be affected by the self-excitation effect, resulting in insufficient amplification gain or amplification factor of the signal by the relay device.
  • the self-excitation effect means that the signal transmitted by the relay device is further amplified by the receiving antenna, and the signal gradually increases from the forwarded signal to the receiving antenna, exceeding the normal working range of the device.
  • the self-excitation effect will cause signal distortion, which will degrade the communication performance in relay communication.
  • Frequency-shifting amplification and forwarding filter the received signal before amplification, so it is not easy to produce self-excitation effect, and may have greater amplification gain. In the frequency shift amplification and forwarding, how to determine the frequency shift value of the relay device is a technical problem to be solved in this application.
  • the present application provides a relay frequency shifting method, including: a base station determines a frequency parameter of a first signal, such as a frequency shift value.
  • the base station sends the indication information of the frequency parameter to the relay device, and the relay device shifts the frequency of the first signal according to the frequency parameter, so as to ensure that the first signal after the frequency shift is located on the GSCN. Since the UE receives the first signal on the GSCN, the success rate of the UE receiving the first signal can be improved.
  • Synchronization signal/physical broadcast channel block (SSB)
  • the SSB includes at least one of the following: primary synchronization signal (primary synchronization signal, PSS), secondary synchronization signal (secondary synchronization signal, SSS), physical broadcast signal (physical broadcast channel block, PBCH), or solution Tuning reference signal (demodulation reference signal, DMRS) and so on.
  • primary synchronization signal primary synchronization signal
  • secondary synchronization signal secondary synchronization signal
  • SSS secondary synchronization signal
  • physical broadcast signal physical broadcast channel block
  • DMRS solution Tuning reference signal
  • CD-SSB cell defining
  • NCD-SSB non-cell defining (none cell defining, NCD-SSB.
  • a synchronization grid is defined.
  • the synchronization grid corresponds to the frequency position where the SSB may be transmitted.
  • the UE can search for the SSB based on the synchronization grid.
  • the interval of the synchronization grid can be 1.2MHz, 1.3MHz, 1.4MHz, etc.
  • the interval of the synchronization grid may be 1.44 MHz; in the range of the carrier frequency of 24.25 to 100 GHz, the interval of the synchronization grid may be 17.28 MHz.
  • the interval of the synchronization grid is generally relatively large, thereby reducing the number of times the UE needs to search for synchronization.
  • a global synchronization raster (global synchronization raster) is defined, and the frequency domain position SS REF of the SSB corresponds to a global synchronization channel number (global synchronization channel number, GSCN).
  • Table 1 GSCN parameters for the global frequency raster (GSCN parameters for the global frequency raster);
  • each SSB corresponds to one GSCN.
  • the frequency position of the SSB in Table 1 is the frequency position where the SSB may be transmitted, and the base station transmits the SSB at the above possible frequency position of the SSB.
  • the GSCN can be pre-configured for the UE, and the UE searches for the SSB on the frequency corresponding to the GSCN. If the SSB sent by the base station is not located on the GSCN, the UE may not be able to search for the SSB.
  • the GSCN is an index of the global synchronization grid, and the frequency position of the grid corresponding to the index is the frequency position where the SSB may be sent.
  • the base station can transmit SSB at frequency position 1350kHz.
  • the UE may receive the SSB on the grid corresponding to the GSCN with the index 3, that is, in the frequency position 1350 KHz.
  • the transmitted signal is a bandwidth signal, and there are many signals of different frequencies in the bandwidth signal, and these different frequencies are called subcarriers.
  • the data of the base station and the UE are modulated onto these subcarriers, and these subcarriers are orthogonal within a period of time.
  • each space in the frequency domain is called a subcarrier, which can be used to transmit data.
  • Table 2 The mapping relationship between the subcarrier spacing ⁇ f and the subcarrier spacing index ⁇ ;
  • mu ⁇ f 2 ⁇ ⁇ 15[kHz] cyclic prefix 0 15 normal 1 30 normal 2 60 normal, extended 3 120 normal 4 240 normal
  • Resource block (resource block, RB);
  • a resource block also called a physical resource block (PRB) is a basic unit of frequency resources in an orthogonal frequency division multiplexing (othogonal frequency divided multiplexing, OFDM) communication system.
  • a resource block can be composed of N resource elements (reource element, RE), and a resource element is also called a subcarrier, and the value of N is generally 12.
  • the base station can configure the SSB to the UE through the information element FrequencyInfoDL in the RRC signaling, and the information element includes at least the absolute radio frequency channel number of the SSB and the absolute radio frequency channel number of Point A (PointA).
  • the information element includes at least the absolute radio frequency channel number of the SSB and the absolute radio frequency channel number of Point A (PointA).
  • the absolute frequency of the SSB satisfies the following Equation 1:
  • F REF F REF-Offs + ⁇ F Global (N REF –N REF-Offs ), Formula 1
  • F REF represents the absolute frequency of the SSB
  • the F REF-Offs represents the starting point of the SSB frequency
  • the ⁇ F Global represents the granularity of the SSB frequency
  • the N REF represents the ARFCH of the SSB
  • the N REF- Offs indicates the starting number of the SSB frequency.
  • the present application provides a flow of a relay frequency shifting method, which at least includes the following:
  • the base station determines a frequency parameter of the first signal, where the frequency parameter may be a frequency shift value, a relay frequency shift value, or a frequency difference between a signal received by a relay device and a signal sent by a relay device.
  • the determination of the frequency shift value of the first signal by the base station is taken as an example for description.
  • the 700 is optional.
  • the base station sends indication information of the frequency shift value to the relay device, and this 701 is optional.
  • the base station stores the mapping relationship between the frequency range and the frequency shift value, or the mapping relationship between the GSCN range and the frequency shift value.
  • the base station can acquire the frequency range or GSCN range of the first signal, and search for the frequency shift value corresponding to the current frequency range or GSCN range of the first signal in the above-mentioned pre-stored mapping relationship.
  • the base station notifies the relay device of the frequency shift value.
  • the base station may notify the relay device of the specific value of the above frequency shift value.
  • the base station may notify the relay device of the index of the frequency shift value.
  • the relay device determines a specific frequency shift value according to the index.
  • the mapping relationship between the frequency shift value and the index value may be shown in Table 4a below.
  • Table 4a Mapping relationship between frequency shift value and index
  • index frequency shift value index 1 Shift value 1 index 2 Shift value 2 ... ... index N Frequency shift value N
  • the frequency shift value needs to meet certain conditions or calculation formulas.
  • the conditions or calculation formulas that the frequency shift value needs to meet above can be known by the relay device.
  • the base station is pre-configured to the relay device, or stipulated by a protocol.
  • the base station may notify the relay device of the condition of the frequency shift value or the value of each unknown parameter in the calculation formula.
  • the values of parameters N1 and M1 in Table 5 below may be notified to the relay device.
  • the relay device may be notified of a set of unknown parameter values, and the relay device selects a specific value from the above-mentioned set by itself, and calculates a frequency shift value, etc., without limitation.
  • the conditions or calculation formulas satisfied by the frequency shift value are not the same.
  • the relay device may determine the frequency shift value according to the frequency range or GSCN range where the first signal is located, and the conditions or calculation formulas satisfied by different frequency ranges or GSCN ranges.
  • the relay device may only work in a certain frequency range, and the relay device can directly receive the indication information of the frequency shift value and determine the frequency shift value according to the frequency band it works on and preset rules.
  • the relay device receives a first signal from a base station.
  • the relay device performs frequency shift on the first signal according to the frequency shift value.
  • the relay device may perform frequency shift on the first signal according to the magnitude of the frequency shift value notified by the base station.
  • the frequency at which the relay device receives the first signal is f 0
  • the first signal can be shifted from frequency f 0 to f rn according to the magnitude of the frequency shift value notified by the base station, and at frequency f rn Sending a first signal, etc. to a UE.
  • the frequency-shifted first signal may be located on the GSCN.
  • the GSCN corresponds to a grid, and the first signal is located on the GSCN. It may mean that the frequency position of the grid corresponding to the GSCN overlaps or is the same as the frequency position at which the base station may transmit SSB.
  • the overlapping refers to the grid corresponding to the GSCN.
  • the frequency position of the SSB completely overlaps or partially overlaps with the frequency position where the base station may transmit the SSB, which is not limited.
  • the frequency positions of the two are the same, which may mean that the frequency positions of the two are completely the same.
  • the first signal being located on the GSCN refer to the introduction in the second part of the communication terminology explanation for the synchronization grid. Since the UE searches for the downlink signal on the GSCN, the frequency-shifted first signal is located on the GSCN, so that the UE can search for the first signal and improve the success rate of the UE receiving the first signal.
  • the relay device sends the frequency-shifted first signal to the UE.
  • the relay device receives the first signal from the base station, shifts the frequency of the first signal, and forwards it to the UE.
  • the relay device also needs to amplify the first signal, so that the first signal supports a longer transmission distance.
  • the frequency-shifting amplification and forwarding may enable the relay device to forward the first signal with a larger amplification factor or a higher output power without causing a self-excitation effect.
  • the determination of the frequency shift value of the downlink signal is taken as an example. It can be understood that the above-mentioned process shown in FIG. 7 can also be applied to the process of shifting the frequency of the uplink signal.
  • the first signal may be an uplink signal.
  • the base station may follow the manner in 700: determine a frequency parameter of the uplink signal, such as a frequency shift value.
  • the relay device may perform frequency shift, etc. on the uplink signal according to the indicated frequency parameter, and the process is similar to the above, and will not be repeated here.
  • the above process of 700 may include: the base station determines the frequency shift value of the first signal according to the frequency range or GSCN range corresponding to the first signal.
  • the first signal may be a downlink signal to be sent by the base station, for example, SSB and the like. Only when the UE accesses the SSB according to the cell, that is, the CD-SSB, can it successfully access the network. Therefore, unless otherwise specified, SSB in this application refers to CD-SSB.
  • the frequency shift value refers to a difference between a frequency at which the relay device receives the first signal and a frequency at which the relay device sends the first signal.
  • the frequency shift value f ⁇ f rn,tx - f rn,rx .
  • the frequency shift value f ⁇ f rn, tx -f 0 .
  • the frequency shift value f ⁇ may be related to at least one of the following parameters: the GSCN number of the first signal, the frequency f rn,rx at which the relay device receives the first signal, the first The frequency f rn,tx of the signal, or the frequency f 0 of the first signal sent by the base station, etc.
  • the frequency of the first signal or SSB may refer to the center frequency of the first signal or SSB, or the frequency position of the starting subcarrier (or resource block), or the carrier frequency, or other frequencies, etc., Not limited.
  • the specific process of determining the frequency shift value of the first signal according to the frequency range or GSCN range corresponding to the first signal refer to the following description.
  • the base station can determine the size of the frequency shift value according to the frequency range or GSCN range corresponding to the first signal, and the base station indicates the size of the above frequency shift value to the relay device, and the relay device shifts the frequency according to the above value, to shift the frequency of the first signal.
  • the reason for the above operation can be explained as follows: the UE can search for downlink signals, such as SSB, on the GSCN. According to the current scheme, the frequency shift value of the relay device is not stipulated. The relay device can arbitrarily shift the frequency of the received downlink signal, which may cause the downlink signal after the frequency shift to not be on the GSCN, and the UE cannot receive the downlink signal. downlink signal.
  • the base station determines the frequency shift value of the downlink signal according to the frequency range or GSCN range of the downlink signal.
  • the subsequent relay device shifts the frequency of the downlink signal according to the frequency shift value indicated by the base station, which can ensure that the downlink signal after the frequency shift is located on the GSCN, and improves the success rate of the UE receiving the downlink signal.
  • the initial random access process in NR includes at least the following:
  • the base station sends a synchronization signal at a specific location.
  • the synchronization signal sent by the base station is called SSB, and the SSB can be sent periodically by the base station, etc.
  • SSB can be composed of PSS, SSS, PBCH, and DMRS.
  • the content carried by the PBCH is called the master system information block (master information block, MIB), and the MIB may indicate the search space (namely search space 0) and control resource set (control resource set) of the system information block (system information block1, SIB1) 0) and other main information.
  • the SSB indicating SIB1 is called CD SSB.
  • the SSB that does not indicate SIB1 is called NCD SSB.
  • the UE After the UE is powered on or needs to re-connect to the network, it can scan the synchronization signal of the base station to perform downlink time and frequency synchronization. This process is called the cell search process.
  • the UE may receive the SSB, such as the cell-defined SSB, and receive the SIB1 in the subsequent step 801 according to information such as the search space and control resource set of the SIB1 indicated by the cell-defined SSB.
  • the random access resource configuration information carried in SIB1 in 801 determine at least one random access resource, etc., or it can be described as, the above SIB1 bearer can configure at least one random access resource for the UE.
  • the base station broadcasts system information at a specific location, and the signal carrying the system information is called an SIB.
  • the SIB may be SIB1.
  • the SIB1 can carry random access resource configuration, message 2/message 4 and other PDCCH search space information, which can be used for the UE to perform random access, establish a connection between the UE and the base station, and access the base station.
  • the UE selects a random access resource associated with the SSB according to the configuration information of the random access resource and the synchronized SSB.
  • the resources include time resources, frequency domain resources, and code domain resources.
  • the code domain resources may include random access resources. Preamble (preamble) code, etc.
  • the base station configures at least one random access resource for the UE through the SIB1 in 801, and each random access resource may have a mapping relationship with the SSB.
  • the UE may select the random access resource corresponding to the synchronized SSB according to the above mapping relationship.
  • the UE may use the above random access resource to perform a random access procedure.
  • the UE's random access procedure may include:
  • the UE may send a random access preamble, also referred to as message 1, on the random access resource.
  • the base station will try to receive the random access preamble, and after successful reception, send message 2 to the UE.
  • the uplink transmission of the UE is scheduled, and the message of the scheduled uplink transmission may be called a message 3 . That is to say, when receiving the message 2, the UE may send the message 3 to the base station according to the scheduling of the message 2.
  • the base station may also send message 4 to the UE after receiving the above message 3 .
  • the reason for this operation may be: on the same random access resource, there may be multiple UEs sending message 3 to the base station, and the base station may select one of the multiple UEs to send message 4 to it, and the above multiple UEs that have not received message 4 may initiate random access again on other random access resources.
  • the UE may cause the random access procedure of the UE to fail.
  • the grid corresponding to each GSCN corresponds to the frequency position of the SSB that the base station may transmit. Since in this application, the SSB sent by the base station needs to be relay-shifted through the relay device, it may happen that the SSB after the relay frequency shift is not located on the GSCN, resulting in failure of the random access process of the UE. Meanwhile, in this application, there is a corresponding relationship between the frequency range of the SSB and the range of the GSCN.
  • the first frequency range corresponds to the first GSCN range
  • the second frequency range corresponds to the second GSCN range
  • the third frequency range corresponds to the third GSCN range
  • the base station determines the frequency shift value of the SSB based on the frequency range of the SSB or the range of the GSCN, and indicates the frequency shift value to the relay device, so that the SSB after the frequency shift of the relay device is located on the GSCN, improving UE Probability of random access success.
  • both the frequency of the SSB before the frequency shift and the frequency of the SSB after the frequency shift are located on the GSCN.
  • the following two cases are further subdivided.
  • the frequency of the SSB before the frequency shift and the frequency of the SSB after the frequency shift belong to the same frequency range.
  • the pre-divided frequency range includes a first frequency range, a second frequency range and a third frequency range
  • the first frequency range includes 0-3000MHz
  • the second frequency range includes 3000-24250MHz
  • the third frequency range includes 24250-100000 MHz.
  • the frequency of the SSB before the frequency shift and the frequency of the SSB after the frequency shift belong to the same frequency range, which means that both the SSB before the frequency shift and the SSB after the frequency shift belong to the first frequency range, or both belong to the second frequency range, or both belong to the third frequency range.
  • the parameters in each column in Table 4b are described.
  • the frequency position at which the base station sends the SSB can satisfy the following formula 2;
  • the GSCN of the SSB sent by the base station satisfies the following formula 3, and the value range of the GSCN of the SSB sent by the base station is an integer between 2 and 7498.
  • N bs is an integer between 1 and 2449, and M bs ⁇ 1,3,5 ⁇ , that is, the value of M bs is 1, 3 or 5.
  • the frequency position of the SSB calculated according to the above formula 2 is equal to 1350kHz
  • the GSCN of the SSB calculated according to the above formula 3 is equal to 3 . That is, the frequency position is 1350KHz, and the index corresponding to GSCN is 3.
  • the frequency position of the SSB after the frequency shift of the relay device satisfies the following formula 4
  • the GSCN of the SSB after the frequency shift satisfies the following formula 5
  • the GSCN of the SSB after the frequency shift The range is 2 to 7498.
  • N rn is an integration between 1 and 2499, and M rn ⁇ 1,3,5 ⁇ .
  • the frequency position of the SSB after the frequency shift calculated according to the above formula 3 is equal to 2250kHz
  • the frequency position of the SSB calculated according to the above formula 4 GSCN is equal to 6. That is, the frequency position is 2250KHz, and the index corresponding to GSCN is 6.
  • the second frequency range and the third frequency range are similar to the above-mentioned first frequency range, and will not be described one by one.
  • the first frequency range 0-3000MHz has a mapping relationship with the first GSCN range 2-7498
  • the second frequency range 3000-24250MHz has a mapping relationship with the second GSCN range 7499-22255
  • the third frequency range 24250-100000MHz has a mapping relationship with the third
  • the frequency shift value f ⁇ of the SSB refers to Table 5 to Table 8 below.
  • Table 7 and Table 8 the mapping relationship between the frequency range and the frequency shift value f ⁇ is described.
  • Table 5 the value unit of the frequency shift value f ⁇ is kHz.
  • the value unit of the frequency shift value f ⁇ in 7 is a resource element or subcarrier, and the value unit of the frequency shift value f ⁇ in Table 8 is a resource block.
  • Table 6 the mapping relationship between the GSCN range and the frequency shift value f ⁇ is described, and the value unit of the frequency shift value f ⁇ is MHz.
  • the value ranges of the parameters in all the tables are only for illustration and not for limitation.
  • the values of the parameters N1 and/or M1 in the following Table 5, Table 6, Table 7, or Table 8 are only examples and do not constitute limitations.
  • the indication information of the frequency shift value may be used to determine N 1 and/or M 1 , or the indication information of the frequency shift value may be used to determine the frequency shift value f ⁇ .
  • Table 5 can be derived from Table 4b. For example, by making a difference between the frequency position of the SSB after the relay frequency shift in Table 4b and the frequency position of the SSB sent by the base station, the formula for calculating the frequency shift value in Table 5 can be obtained.
  • the value of N 1 can be the difference between N rn and N bs
  • the value of M 1 can be the difference between M rn and M bs , etc.
  • Table 8 The conditions that the frequency shift value f ⁇ satisfies
  • the ⁇ represents the subcarrier spacing index of the SSB.
  • the specific value of ⁇ is 0.
  • the specific value of ⁇ is 3.
  • the base station can calculate the frequency shift value f ⁇ corresponding to different frequency ranges according to the conditions in Table 5, Table 7 or Table 8, and notify the relay device of the frequency shift value f ⁇ corresponding to different frequency ranges.
  • the relay device receives the SSB, if the SSB belongs to the first frequency range, the relay device performs frequency shift on the SSB according to the frequency shift value corresponding to the first frequency range notified by the base station.
  • the relay device if the SSB belongs to the second frequency range or the third frequency range, etc., the relay device performs frequency shift on the SSB according to the frequency shift value corresponding to the second frequency range or the third frequency range notified by the base station.
  • the base station may calculate the frequency shift value f ⁇ corresponding to different GSCN ranges according to the conditions in Table 6 above, and notify the relay device of the frequency shift value f ⁇ corresponding to different GSCN ranges.
  • the relay device receives the SSB, if it determines that the SSB belongs to the first GSCN range, it shifts the frequency of the SSB according to the frequency shift corresponding to the first GSCN range.
  • the relay device determines that the SSB belongs to the second GSCN range or the third GSCN range, it will shift the frequency of the SSB according to the frequency shift value f ⁇ corresponding to the second GSNC range or the third GSCN range notified by the base station.
  • the conditions in Table 5, Table 6, Table 7 or Table 8 above may be stipulated by the protocol, or notified by the base station to the relay device.
  • the base station may specifically notify the relay device of values of unknown parameters in each formula in different frequency ranges or GSCN ranges in Table 5, Table 6, Table 7 or Table 8 above.
  • the base station notifies the relay device of the values of N 1 and M 1 in different frequency ranges in Table 5, or the values of N 1 in different GSCN ranges in Table 6, or, the values of N 1 and M 1 in different frequency ranges in Table 7.
  • the relay device determines the frequency range or GSCN range to which the SSB belongs.
  • the determination that the SSB belongs to the frequency range is taken as an example to continue the description, and the determined frequency range to which the SSB belongs may be called a target frequency range.
  • the mapping relationship between the frequency range and the frequency shift value calculation formula contained in Table 5, Table 7 or Table 8 query the frequency shift calculation formula corresponding to the target frequency range, which is called the target frequency shift calculation formula.
  • the specific frequency shift value of the SSB is calculated.
  • the SSB is frequency shifted according to the calculated frequency shift value.
  • the base station may notify the relay device of the value range of the parameters in each frequency shift calculation formula in any of the above-mentioned Tables 5 to 8, and the value range may be the value range specified in the above-mentioned Table 5 to Table 8 Subset.
  • the specified value range of N 1 is an integer between -7499 and 7499.
  • the value range notified by the base station to the relay device may be an integer between -X1 and X1, etc., and the value of X1 is less than 7499.
  • the relay device may determine the specific value of N1 in the above-mentioned range between -X1 and X1 according to preset regulations or other methods.
  • the frequency shift value is calculated according to the conditions in any one of Table 5 to Table 8.
  • the relay device shifts the frequency of the SSB according to the frequency shift value calculated above, and the frequency shifted SSB can be located on the GSCN, which improves the probability of successful random access of the UE.
  • the SSBs before and after the frequency shift belong to the same frequency range.
  • the frequency of the SSB before the frequency shift and the frequency of the SSB after the frequency shift belong to different frequency ranges. Take pre-dividing three frequency ranges as an example, which are respectively the first frequency range, the second frequency range and the third frequency range.
  • the frequency range of the SSB before the frequency shift and the frequency range of the SSB after the frequency shift can form nine frequency range combinations.
  • the frequency range combinations composed of the frequency range of the SSB before the frequency shift and the frequency range of the SSB after the frequency shift are respectively (the first frequency range, the second frequency range), (the first frequency range, the third frequency range), or (second frequency range, third frequency range) as an example.
  • Table 9 or Table 10 For the conditions to be met by the frequency shift value of the SSB, refer to Table 9 or Table 10 below.
  • Table 9 or 10 the mapping relationship between the frequency range before and after the frequency shift and the frequency shift value is described. The difference is that in Table 9, the unit of the frequency shift value is MHz, and in Table 10, the unit of the frequency shift value is resource elements or subcarriers.
  • Table 10 the frequency shift value f ⁇ satisfies the condition
  • the ⁇ 1 is the subcarrier spacing index of SSB
  • the ⁇ 2 is the subcarrier spacing index of other signals except SSB, for example, the subcarrier spacing of SIB1, etc.
  • the base station can calculate the frequency shift values corresponding to different frequency ranges of the SSB before and after the frequency shift according to the conditions in Table 9 or Table 10, and notify the UE.
  • the relay device receives the SSB, it determines the frequency range for receiving the SSB, which can be considered as the frequency range before the SSB frequency shift; the relay device can determine the frequency range of the SSB after the frequency shift, and the frequency range of the SSB after the frequency shift
  • the frequency range can be determined independently by the relay device, or notified by the base station to the relay device, or stipulated by the agreement, and is not limited; the frequency range combination before and after the SSB frequency shift is formed by the relay device, and this combination can be called the target frequency range combination ;
  • the relay device can determine the frequency shift value corresponding to the target frequency range combination in the mapping relationship between the different frequency range combinations and the frequency shift value notified by the base station, as the target frequency shift value; SSB performs frequency shifting.
  • the frequency-shifted SSB is located on the GSCN, and the probability of successful random access of the UE is improved.
  • the SSB before and after the frequency shift belongs to different frequency ranges.
  • the second case as shown in Figure 9b, the SSB before the frequency shift is not on the GSCN, and the SSB after the frequency shift is on the GSCN. Regarding the second case, it can be further subdivided into the following two cases.
  • the frequency of the SSB before the frequency shift and the frequency of the SSB after the frequency shift belong to the same frequency range.
  • the frequency of the SSB before the frequency shift and the frequency of the SSB after the frequency shift may both belong to the first frequency range, the second frequency range, or the third frequency range.
  • the first frequency range, the second frequency range and the third frequency range please refer to Table 11 below.
  • the mapping relationship between the frequency position of the base station transmitting SSB and the frequency position of the SSB after frequency shifting is recorded in different frequency ranges.
  • the SSB sent by the base station is not located on the GSCN, that is to say, there is no mapping relationship between the frequency position where the base station sends the SSB and the GSCN.
  • the SSB is located on the GSCN after the frequency shift. That is to say, even if the SSB sent by the base station is not located on the GSCN, this design can ensure that the SSB after the frequency shift is located on the GSCN, which improves the probability of UE random access success.
  • the UE generally does not directly detect the SSB, so it does not directly access the base station through the SSB sent by the base station, which makes it easier for the base station to distinguish between UEs directly connected to the base station and UEs connected to the base station through a relay.
  • this Table 12 can be obtained from Table 11, and the frequency position of the SSB after weighing in the above Table 11 and the frequency position of the base station sending the SSB are differenced, and the calculation formula of the frequency shift value in Table 12 can be obtained.
  • the base station can calculate the frequency shift values in different frequency ranges according to the description in Table 12 above, and notify the relay device of the mapping relationship between different frequency ranges and frequency shift values.
  • the relay device receives the SSB, it can judge whether the SSB is on the GSCN; if it is not on the GSCN, it determines the frequency range to which the SSB belongs, which is called the target frequency range.
  • the frequency shift value corresponding to the target frequency range is determined, which is called the target frequency shift value.
  • the relay device performs frequency shift on the SSB according to the magnitude of the target frequency shift value.
  • the above-mentioned Table 12 can be known by the relay device in advance, and the way of knowing in advance may be notified by the base station to the relay device, or stipulated by a protocol, etc., and is not limited. Subsequently, the base station may notify the relay device of the specific value of each parameter in each frequency shift value calculation formula in Table 12 above, or the value range of each parameter.
  • the relay device receives the SSB and determines that the SSB sent by the base station does not belong to the GSCN, it can independently calculate the frequency shift value by combining the frequency shift value calculation formula in Table 12 above with the values of various parameters notified by the base station.
  • the frequency of the SSB before the frequency shift and the frequency of the SSB after the frequency shift belong to different frequency ranges.
  • the pre-divided frequency range includes a first frequency range, a second frequency range and a third frequency range.
  • the frequency range to which the SSB belongs before the frequency shift and the frequency range to which the SSB belongs after the frequency shift can form 9 combinations of frequency ranges.
  • Table 13a the combination of the frequency range of the SSB before the frequency and the frequency range of the SSB after the frequency shift is respectively (the first frequency range, the second frequency range), (the first frequency range, the third Frequency range), (second frequency range, third frequency range) are described as examples.
  • the base station can also calculate the frequency shift value corresponding to different frequency range combinations according to the above table 13a, and notify the relay device.
  • the above table 13a can be known by the UE in advance, and the base station can notify the UE of the values of the parameters in the calculation formula of the frequency shift value in the above table 13a.
  • the relay device may combine the calculation formula in Table 13a and the value of each parameter notified by the base station to calculate the frequency shift value and the like.
  • the difference from the above case 2.1 may be that when the base station receives the SSB and determines that the SSB is not on the GSCN, the frequency range of the SSB before the frequency shift and the frequency range of the SSB after the frequency shift can be combined to form a frequency range combination called Target frequency range combination; in Table 13a or in the mapping relationship between different frequency range combinations and frequency shift values notified by the base station, search for the target frequency range combination and the corresponding frequency shift value.
  • the base station notifies the relay device of the magnitude of the frequency shift value, or the value of each parameter in the frequency shift value calculation formula as an example.
  • the base station may also notify the relay device of the frequency range or GSCN range to which the SSB is currently to be sent, which may be called a target frequency range or a target GSCN range.
  • the relay device When the relay device receives the SSB, according to the target frequency range or the target GSCN range, the mapping relationship between the frequency range and the frequency shift value calculation formula recorded in any of the above tables 5 to 13a, or the GSCN range and the shift value In the mapping relationship of the frequency value calculation formula, find the frequency shift value calculation formula corresponding to the target frequency range or the target GSCN range, and calculate the frequency shift value according to the found calculation formula; the relay device shifts the SSB according to the target frequency shift value frequency value etc.
  • the way that the base station notifies the relay device of the frequency range or GSCN range to which the SSB belongs is mainly to consider that some relay devices may only be responsible for frequency shifting and forwarding the SSB, and may not care about the frequency range or GSCN range of the SSB.
  • the relay device may determine the frequency range or the GSCN range to which the SSB belongs according to the frequency position of the SSB.
  • the relay device determines the frequency shift of the relay according to the frequency range or the GSCN range to which the SSB belongs.
  • the specific rules for determining the frequency shift value according to the frequency range or GSCN range to which the SSB belongs may be stipulated in the protocol or notified by the base station.
  • the relay device may calculate the frequency shift value of the SSB and the like according to the frequency shift calculation formula in any one of Table 5 to Table 13a.
  • the specific execution process of the above 700 may include: the base station determines the frequency shift value of the first signal according to the first mapping relationship.
  • the first mapping relationship may satisfy the following formula 14, formula 15 or formula 16.
  • the f ⁇ represents the frequency shift value of the first signal
  • the unit of the f ⁇ is a resource element or a subcarrier
  • the k is an integer
  • the f ⁇ represents the frequency shift value of the first signal
  • the unit of the f ⁇ is a resource block
  • the k is an integer.
  • k ⁇ 1,2,3,4 ⁇ in the above formula f ⁇ 32 ⁇ k.
  • the relay device when the relay device performs relay frequency shift, the signal arriving at the receiving end will have a phase deviation, and the receiving end needs to perform additional phase compensation to demodulate the signal normally.
  • the frequency shift value calculated by the above formula 14, formula 15 or formula 16 when the frequency shift value calculated by the above formula 14, formula 15 or formula 16 is used for frequency shifting, the receiving end does not need to perform additional phase compensation, which simplifies the impact of the relay frequency shift.
  • the relay device shifts the frequency according to the frequency shift value calculated by the above formula 14, formula 15 or formula 16, and the SSB after the frequency shift can be located on the GSCN to ensure the normal access of the UE to the network.
  • the transceiving process can be approximately described as: the baseband signal at the transmitting end is recorded as: Where a k,l is the data signal to be sent; the baseband signal undergoes the above conversion, and the signal sent on the antenna is recorded as:
  • the signal received by the relay terminal can be Where h k, l is the channel coefficient from the sender to the relay, and f 0 is the carrier frequency of the sender; the converted signal at the receiver is: Among them, g k, l is the end-to-end channel coefficient, and f 2 is the carrier frequency of the receiving end. It can be seen that the converted signal at the receiving end may have a phase deviation
  • the offset is related to time l (l is the OFDM symbol index).
  • phase deviation If is not equal to 1, a phase deviation related to time l (l is the OFDM symbol index) will remain at the receiving end, resulting in the signal being unable to be demodulated.
  • the receiver needs to perform additional phase compensation on the received signal.
  • the frequency shift value is f ⁇
  • the corresponding phase compensation is if Then the phase compensation value corresponds to The value of is 1, and the receiving end may not perform additional phase compensation at this time.
  • k' when the following conditions are met such that
  • the frequency shift value in order to facilitate UE access and ensure that the frequency shifted SSB is located on the GSCN, the frequency shift value must also meet the conditions in Table 7 above. Combining the above two conditions, the least common multiple can be taken for the values in Table 7 and Table 14, so that the above formula 14, formula 15 or formula 16 can be deduced.
  • the relay device shifts the frequency of the SSB according to the frequency shift value calculated by the above formula 14, formula 15 or formula 16, and the UE at the receiving end does not need additional phase compensation, which simplifies the subsequent operations after the relay frequency shift . And it can be ensured that the SSB after the frequency shift is located on the GSCN, so that the UE can access normally.
  • the determined frequency shift value in 700 may satisfy the following conditions: frequency shift value
  • the unit may be a resource block, corresponding to the subcarrier spacing of the SSB, or the subcarrier spacing of the SIB1, or the common subcarrier spacing.
  • the frequency shift value may be an integer multiple of 4.32MHz.
  • f ⁇ 4.32 ⁇ N[MHz], where N is an integer.
  • the frequency shift value may be an integer multiple of 5.76MHz.
  • f ⁇ 5.76 ⁇ N[MHz], where N is an integer.
  • the frequency shift value f ⁇ can be related to the CORESET bandwidth of Type0-PDCCH CSS related.
  • the relay device or UE can be based on To determine the frequency shift value, the base station does not need to configure the frequency shift value separately, saving signaling overhead.
  • the absolute frequency after frequency shift of the SSB determined by the base station, the relay device or the UE may satisfy the following formula 17:
  • F REF F REF-Offs + ⁇ F Global (N REF –N REF-Offs –N REF-Shift );
  • the F REF represents the absolute frequency of the SSB after the frequency shift
  • the F REF-Offs represents the frequency starting point of the SSB
  • the ⁇ F Global represents the frequency granularity of the SSB
  • the N REF represents the SSB number, that is For the ARFCH of SSB
  • the N REF-Offs indicates the starting number of the SSB frequency
  • the N REF-Shift indicates parameters related to the frequency shift value.
  • the base station can use the field for configuring the frequency shift value of SSB in the SSB configuration information, for example, frequencyShiftSSB, or the field for configuring the frequency shift value of PointA, for example, frequencyShiftPointA, and set the above parameter N REF- Shift is configured for relay devices or UEs, etc.
  • this embodiment 2 provides a flow of a relay frequency shifting method, which can be used to configure the frequency parameters determined in the above embodiment 1, such as the frequency shift value, to the relay device, at least Including the following:
  • the relay device accesses the base station and establishes a connection relationship with the base station.
  • the relay device reports the relay capability to the base station. This process can be called relay capability reporting, which can include whether the relay can support frequency shift forwarding, frequency shift range, frequency shift value, signal amplification factor, and terminal processing control commands. At least one of delay, relay operating bandwidth, or relay operating carrier frequency.
  • the supported frequency shift values may be reported.
  • the supported range If there is a corresponding relationship between the frequency shift value and the magnification factor, the corresponding relationship may also be reported.
  • the reporting overhead can be reduced based on the difference.
  • the relay is working, that is, amplifying and forwarding.
  • the trigger condition for starting the relay may be at least one of the following: the relay device determines to start the work according to the indication information of the base station, and the relay device determines to start the work according to the UE.
  • the base station instructs the relay to turn on the amplification and forwarding mode, and further indicates at least one of the following: amplification factor, frequency position f rn,rx of the received signal and/or frequency position f rn,tx of the frequency-shifted signal, bandwidth of the amplified signal, Downlink transmission power, uplink transmission power, working time (for example, time slot/OFDM symbol), this is 1002 is optional.
  • the base station can control whether the relay device starts working according to whether there are users under the relay device. For example, if the base station determines that a user enters the working area of the relay device, it instructs the relay device to start working.
  • the relay device may enable the relay according to the sending cycle and/or sending time of information such as system information (eg, SSB, random access, and paging message).
  • system information eg, SSB, random access, and paging message.
  • the step 1003 Determine the frequency shift trigger condition, and trigger the frequency shift forwarding working mode.
  • the step 1003 is optional, that is, the relay enables the frequency shift forwarding function by default.
  • the relay device may determine whether to enable frequency shift forwarding according to at least one of the following information: received signal strength, amplification factor, and path loss between the relay transmitting antenna and the receiving antenna. For example, if the difference between the path loss and the amplification factor between the transmitting antenna and the receiving antenna does not reach a predetermined value, frequency shift forwarding is enabled. In this way, the relay device may adopt a larger amplification factor for the received signal, so that the relay device has a better beneficial effect on assisting the communication between the UE and the base station.
  • the frequency shifting (using the same frequency) forwarding mode is not enabled to assist the downlink communication, otherwise the frequency shifting forwarding mode is used to assist the downlink communication; for another example, If the UE signal received by the relay is greater than the threshold value or the amplification factor is smaller than the threshold value, the frequency shifting (same frequency) forwarding mode is not enabled to assist uplink communication; otherwise, the frequency shifting forwarding mode is used to assist uplink communication.
  • the threshold value of the signal quality or the threshold value of the multiplied value may be determined by configuration information of the base station, or may be a pre-configured value.
  • the base station determines whether the relay needs to enable frequency shift forwarding according to the signal quality requirements of downlink communication or uplink communication (or QoS requirements, such as delay, rate, etc.). At this time, the base station may instruct the relay device to perform frequency shift forwarding, and the base station may further indicate a frequency shift value, and the UE determines a specific frequency shift value according to the indication information and enters a frequency shift relay mode.
  • step 1003 The premise of step 1003 is that the relay device supports the working method of determining whether to shift frequency and forward according to the configuration information.
  • the frequency shift parameter can be determined by the base station and sent to the relay device; it can also be that the relay device determines one or more values of the frequency shift parameter according to its own situation, and then requests the base station to configure specific values; it can also be further determined by the UE.
  • the relay device performs frequency shift, amplification, and forwarding on the SSB according to the configuration information, and assists in synchronization between the UE and the base station.
  • the original frequency of the SSB is f m
  • the frequency of the SSB is f 0 .
  • 1006 Determine the condition for disabling frequency shifting, and trigger the working mode of disabling frequency shifting forwarding. This 1006 is optional.
  • the relay device determines whether to disable frequency shift forwarding according to at least one of the following information: received signal strength, amplification factor, and path loss between the relay transmitting antenna and the receiving antenna. For example, if the difference between the path loss and the amplification factor between the transmitting antenna and the receiving antenna exceeds a predetermined value, frequency shift forwarding is turned off. This method may make the relay device not perform frequency shift when receiving signal amplification and forwarding, thereby simplifying the relay operation and reducing power consumption and complexity. For another example, if the quality of the signal received by the relay device from the base station is greater than the threshold value or the amplification factor is smaller than the threshold value, then the frequency shifting (using the same frequency) forwarding mode is turned off to assist downlink communication.
  • the threshold value of the signal quality or the threshold value of the multiplied value may be determined by configuration information of the base station, or may be a pre-configured value.
  • the base station determines whether the relay needs to turn off frequency shift forwarding according to the signal quality requirements (or QoS requirements, such as delay and rate) of downlink communication or uplink communication. At this time, the base station can instruct the relay to turn off frequency shift forwarding, and the UE enters the same frequency forwarding relay mode according to the instruction information.
  • the signal quality requirements or QoS requirements, such as delay and rate
  • the premise of the above step 1006 is that the relay device supports the working method of determining whether to disable frequency shift forwarding according to the configuration information.
  • the relay device enters the same-frequency forwarding mode, that is, the relay amplifies and forwards the SSB signal to assist the synchronization between the UE and the base station.
  • the frequency of the SSB does not change, and the frequency of the SSB is located at f 0 before and after the relay device works.
  • the trigger condition for turning off the relay may be at least one of the following: the base station determines, the relay device determines to turn off the work according to the indication information of the base station, and the relay device determines to turn off the work according to the UE signal.
  • the base station instructs the relay to turn off the amplify and forward mode.
  • the 1008 is optional.
  • the UE directly communicates with the base station.
  • 1002 and 1003 in FIG. 10 above can be combined into one, and it can be considered that only when the relay mode is turned on, the frequency shift forwarding module is turned on.
  • the above 1006 and 1008 in FIG. 10 can also be combined into one. It can be considered that as long as the frequency shift forwarding module is turned off, that is, the relay mode is turned off.
  • the base station and the relay device include hardware structures and/or software modules corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software with reference to the units and methods described in the examples disclosed in the embodiments disclosed in the present application. Whether a certain function is executed by hardware or computer software drives the hardware depends on the specific application scenario and design constraints of the technical solution.
  • FIG. 11 and FIG. 12 are schematic structural diagrams of possible communication devices provided in this application. These communication apparatuses can be used to realize the functions of the relay device or the base station in the foregoing method embodiments, and thus can also realize the beneficial effects of the foregoing method embodiments.
  • a communication device 1100 includes a processing unit 1110 and a transceiver unit 1120 .
  • the communication apparatus 1100 is configured to realize the function of a relay device or a base station in the method embodiment shown in FIG. 7 above.
  • the processing unit 1110 can perform internal processing; the transceiver unit 1120 can communicate with the outside; the transceiver unit 1120 can also be called a communication interface, an input-output interface, and the like.
  • the transceiver unit 1120 may include a sending unit and a receiving unit, the sending unit is used to perform the sending operation of the base station or the relay device in the method embodiment above; the receiving unit is used to perform the operation of the base station or the relay device in the method embodiment above receive operations, etc.
  • the processing unit 1110 is used to determine the frequency shift value of the first signal according to the frequency range or GSCN range corresponding to the first signal;
  • the transceiving unit 1120 is configured to send indication information of the frequency shift value to the relay device.
  • the transceiver unit 1120 is used to receive the indication information of the frequency shift value from the network device;
  • the frequency shift value is used to shift the frequency of the first signal.
  • the processing unit 1110 is used to determine the frequency shift value of the first signal according to the mapping relationship of the frequency shift value.
  • the transceiving unit 1120 is configured to send indication information of the frequency shift value to the relay device.
  • the transceiver unit 1120 is used to receive the indication information of the frequency shift value from the network device;
  • the frequency shift value is used to shift the frequency of the first signal from the network device.
  • processing unit 1110 and the transceiver unit 1120 can be directly obtained by referring to the relevant descriptions in the method embodiment shown in FIG. 7 , and will not be repeated here.
  • the communication device 1200 includes at least one processor 1210 .
  • the communication device 1200 may also include an interface circuit 1220 .
  • the processor 1210 and the interface circuit 1220 are coupled to each other.
  • the interface circuit 1220 may be a transceiver or an input/output interface or the like.
  • Transceivers include receivers and transmitters. The receiver is used to realize the receiving operation of the base station or the relay device in the above method embodiments, and the transmitter is used to realize the sending operation of the base station or the relay device in the above method embodiments.
  • the input and output interfaces include input interfaces and output interfaces. The input interface is used to implement operations such as receiving of the base station or relay device in the above method embodiments, and the output interface is used to implement operations such as sending of the base station or relay device in the above method embodiments.
  • the communication device 1200 may further include a memory 1230 for storing instructions executed by the processor 1210 or storing input data required by the processor 1210 to execute the instructions or storing data generated after the processor 1210 executes the instructions.
  • the processor 1210 is used to implement the functions of the above-mentioned processing unit 1110
  • the interface circuit 1220 is used to implement the functions of the above-mentioned transceiver unit 1120 .
  • the base station module implements the functions of the base station in the above method embodiment.
  • the base station module receives information from other modules in the base station (such as radio frequency modules or antennas), and the information is sent to the base station by the terminal; or, the base station module sends information to other modules in the base station (such as radio frequency modules or antennas), the The information is sent by the base station to the terminal.
  • the base station module here may be a baseband chip of the base station, or a DU or other modules, and the DU here may be a DU under an open radio access network (O-RAN) architecture.
  • OF-RAN open radio access network
  • a possible schematic diagram of a base station 1300 including: an antenna 1310 , a signal transceiving unit 1320 , a processor 1330 and a memory 1340 .
  • the memory 1340 is used to store computer program codes or instructions, etc.
  • the processor 1330 is used to execute the programs or instructions, so as to determine the frequency shift value of the first signal according to the frequency range or GSCN range of the first signal.
  • the signal transceiving unit 1320 is configured to send indication information of the frequency shift value of the first signal to the relay device through the antenna 1310 .
  • the signal transceiving unit may be a transceiver, including a transmitter and a receiver.
  • the transmitter can send signals to other devices, such as relay devices or terminals.
  • the receiver can receive signals from other devices, such as core network, relay device or terminal, etc.
  • a possible schematic diagram of a relay device 1400 including: a controller 1401 , a signal amplifier 1402 , a signal transceiving unit 1403 , a signal transceiving unit 1404 , an antenna 1405 , and an antenna 1406 .
  • the signal transceiving unit may be a transceiver, including a transmitter and a receiver.
  • the signal transceiving unit 1403 may receive the first signal from the base station and the indication information of the frequency shift value of the first signal via the antenna 1405; the controller 1401 may, according to the frequency range or GSCN range of the first signal, etc. Perform frequency shift; the signal amplifier 1402 may amplify the first signal.
  • the sequence of frequency shifting and amplification of the first signal is not limited.
  • the first signal may be frequency-shifted and amplified at the same time, or the first signal may be frequency-shifted first and then amplified, or the first signal may be amplified first and then frequency-shifted, etc., without limitation.
  • the controller and signal amplifier can be one or more processors.
  • the signal transceiving unit 1404 sends the first signal to the terminal via the antenna 1406 .
  • the first signal may be a frequency-shifted and amplified signal or the like.
  • the relay device chip implements the function of the relay device in the above method embodiment.
  • the relay device chip receives information from other modules in the relay device (such as radio frequency modules or antennas), and the information is sent to the relay device by the base station; or, the relay device chip sends information to other modules in the relay device (such as radio frequency module or antenna) to send information, which is sent by the relay device to the terminal.
  • processor in the embodiments of the present application may be a central processing unit (central processing unit, CPU), and may also be other general processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • CPU central processing unit
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor can be a microprocessor, or any conventional processor.
  • the method steps in the embodiments of the present application may be implemented by means of hardware, or may be implemented by means of a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only Memory, registers, hard disk, removable hard disk, CD-ROM or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
  • the storage medium may also be a component of the processor.
  • the processor and storage medium can be located in the ASIC.
  • the ASIC can be located in a base station or a relay device. Certainly, the processor and the storage medium may also exist in the base station or the relay device as discrete components.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product comprises one or more computer programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are executed in whole or in part.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable devices.
  • the computer program or instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions may be downloaded from a website, computer, A server or data center transmits to another website site, computer, server or data center by wired or wireless means.
  • 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 integrating one or more available media.
  • the available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disk; and it may also be a semiconductor medium, such as a solid state disk.
  • the computer readable storage medium may be a volatile or a nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.
  • the base station, the relay device or the UE may perform part or all of the embodiments of the present application, these or operations are only examples, and the embodiment of the present application may also perform other operations or various operations deformation.
  • each operation may be performed in a different order presented in the embodiment of the present application, and it may not be necessary to perform all the operations in the embodiment of the present application.
  • the operation process of the relay device is described as receiving the first signal, performing frequency shift on the first signal, and sending the first signal.
  • the frequency shifting process of the relay device may be an instantaneous operation. As recorded in FIG. 10 , the relay device directly sends the first signal at the frequency f rn after receiving the first signal at the frequency f 0 .
  • “at least one” means one or more, and “multiple” means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the contextual objects are an “or” relationship; in the formulas of this application, the character “/” indicates that the contextual objects are a “division” Relationship.
  • “Including at least one of A, B and C” may mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

L'invention concerne un procédé et un appareil de décalage de fréquence de relais. Le procédé comprend les étapes suivantes : une station de base détermine une valeur de décalage de fréquence d'un premier signal selon une plage de fréquences ou une plage GSCN du premier signal (par exemple, un SSB), etc. et l'indique à un dispositif de relais ; le dispositif de relais effectue un décalage de fréquence sur le premier signal en fonction de la valeur de décalage de fréquence indiquée par une station de base. Étant donné que différentes plages de fréquences ou différentes plages GSCN correspondent à différentes valeurs de décalage de fréquence, la flexibilité du décalage de fréquence de relais peut être améliorée, et la complexité du décalage de fréquence peut être réduite.
PCT/CN2022/107114 2021-08-05 2022-07-21 Procédé et appareil de décalage de fréquence de relais Ceased WO2023011208A1 (fr)

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