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WO2020133145A1 - Procédé destiné à être utilisé dans une annulation d'auto-brouillage, dispositif terminal et dispositif de réseau - Google Patents

Procédé destiné à être utilisé dans une annulation d'auto-brouillage, dispositif terminal et dispositif de réseau Download PDF

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Publication number
WO2020133145A1
WO2020133145A1 PCT/CN2018/124638 CN2018124638W WO2020133145A1 WO 2020133145 A1 WO2020133145 A1 WO 2020133145A1 CN 2018124638 W CN2018124638 W CN 2018124638W WO 2020133145 A1 WO2020133145 A1 WO 2020133145A1
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WIPO (PCT)
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symbol
duration
uplink
uplink symbol
terminal device
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PCT/CN2018/124638
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English (en)
Chinese (zh)
Inventor
张治�
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Priority to CN201880096773.0A priority Critical patent/CN112586056B/zh
Priority to PCT/CN2018/124638 priority patent/WO2020133145A1/fr
Publication of WO2020133145A1 publication Critical patent/WO2020133145A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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

Definitions

  • This application relates to the field of communications, and in particular to a method, terminal equipment, and network equipment for self-interference cancellation.
  • the terminal may use the self-interference cancellation technology.
  • the uplink and downlink signals on different carriers are usually not synchronized.
  • the base station configures a time advance (TA) value for the terminal device, so that the uplink signal in the terminal device will have a time difference from the downlink signal in time.
  • TA time advance
  • Embodiments of the present application provide a method, terminal device, and network device for self-interference cancellation, which can enable a network device to obtain a time difference between an uplink symbol and a downlink symbol that generate self-interference, so that the terminal device can synchronize the uplink symbol and the downlink symbol To reduce the complexity of self-interference.
  • a method for self-interference cancellation including: a terminal device sending time information to a network device, the time information including a first duration, wherein the first duration represents a starting time of a first uplink symbol
  • the uplink signal carried by the first uplink symbol and the downlink signal carried by the first downlink symbol will cause self-interference if the first time period is earlier than the start time of the first downlink symbol.
  • a method for self-interference cancellation includes: a network device receiving time information sent by the terminal device, the time information including a first duration, where the first duration represents the start of a first uplink symbol The start time is earlier than the start time of the first downlink symbol by the first time period, and the uplink signal carried by the first uplink symbol and the downlink signal carried by the first downlink symbol may cause self-interference.
  • a terminal device for executing the method in the above-mentioned first aspect or various implementations thereof.
  • the terminal device includes a functional module for performing the method in the above-mentioned first aspect or various implementations thereof.
  • a network device for performing the method in the above-mentioned second aspect or various implementations thereof.
  • the network device includes a functional module for performing the method in the above-mentioned second aspect or various implementations thereof.
  • a terminal device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the first aspect or its various implementations.
  • a network device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the second aspect or its implementations.
  • a chip for implementing any one of the above-mentioned first to second aspects or the method in each implementation manner.
  • the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes any one of the above-mentioned first to second aspects or various implementations thereof method.
  • a computer-readable storage medium for storing a computer program that causes a computer to execute the method in any one of the first to second aspects or the various implementations thereof.
  • a computer program product including computer program instructions, which cause the computer to execute the method in any one of the above first to second aspects or in various implementations thereof.
  • a computer program which, when run on a computer, causes the computer to execute the method in any one of the above first to second aspects or the respective implementations thereof.
  • the terminal device determines the time difference between the starting time of the uplink symbol and the downlink symbol that cause self-interference, and sends the time difference to the network device, so that the network device instructs the terminal device to adjust the starting position of the uplink symbol, After the adjustment, the start time or end time of the uplink symbol coincides with the start time of the downlink symbol as much as possible, so as to achieve the effect of time synchronization, so that for the analog or digital self-interference cancellation algorithm, in order to eliminate a downlink symbol For the received interference, only one uplink symbol needs to be sampled, which reduces the complexity of self-interference cancellation.
  • FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of the TA value provided by the embodiment of the present application.
  • FIG. 3 is a schematic diagram of a time difference between an uplink symbol and a downlink symbol provided by an embodiment of this application.
  • FIG. 4 is a schematic diagram of a method for self-interference cancellation provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of positions of adjusted uplink symbols and downlink symbols in the time domain provided by an embodiment of the present application.
  • FIG. 6 is another schematic diagram of adjusted positions of uplink symbols and downlink symbols in the time domain provided by an embodiment of the present application.
  • FIG. 7 is another schematic flowchart of a method for self-interference cancellation provided by an embodiment of the present application.
  • FIG. 8 is a schematic block diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 9 is a schematic block diagram of a network device provided by an embodiment of the present application.
  • FIG. 10 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • FIG. 11 is a schematic block diagram of a chip provided by an embodiment of the present application.
  • FIG. 12 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • GSM Global System
  • CDMA Code Division Multiple Access
  • WCDMA broadband code division multiple access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access, WiMAX
  • the communication system 100 applied in the embodiment of the present application is shown in FIG. 1.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, terminal).
  • the network device 110 can provide communication coverage for a specific geographic area, and can communicate with terminal devices located within the coverage area.
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or a wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, an in-vehicle device, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks or network devices in future public land mobile networks (Public Land Mobile Network, PLMN), etc.
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • LTE Long Term Evolutional Node B
  • eNodeB evolved base station in an LTE system
  • CRAN Cloud Radio Access Network
  • the network equipment can be a mobile switching center, a relay station, an access point, an in-veh
  • the communication system 100 also includes at least one terminal device 120 within the coverage of the network device 110.
  • terminal equipment includes, but is not limited to, connections via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Lines (DSL), digital cables, and direct cable connections ; And/or another data connection/network; and/or via wireless interfaces, such as for cellular networks, wireless local area networks (Wireless Local Area Network, WLAN), digital TV networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter; and/or another terminal device configured to receive/transmit communication signals; and/or Internet of Things (IoT) equipment.
  • PSTN Public Switched Telephone Networks
  • DSL Digital Subscriber Lines
  • WLAN wireless local area networks
  • digital TV networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter
  • IoT Internet of Things
  • a terminal device configured to communicate through a wireless interface may be referred to as a "wireless communication terminal", “wireless terminal”, or “mobile terminal”.
  • mobile terminals include, but are not limited to, satellites or cellular phones; Personal Communication Systems (PCS) terminals that can combine cellular radiotelephones with data processing, facsimile, and data communication capabilities; can include radiotelephones, pagers, Internet/internal PDA with networked access, web browser, notepad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palm-type receivers or others including radiotelephone transceivers Electronic device.
  • PCS Personal Communication Systems
  • GPS Global Positioning System
  • Terminal equipment can refer to access terminal, user equipment (User Equipment), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or User device.
  • Access terminals can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital processing (Personal Digital Assistant (PDA), wireless communication Functional handheld devices, computing devices, or other processing devices connected to a wireless modem, in-vehicle devices, wearable devices, terminal devices in a 5G network, or terminal devices in a PLMN that will evolve in the future, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • terminal device 120 may perform direct terminal (Device to Device, D2D) communication.
  • D2D Direct terminal
  • the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.
  • NR New Radio
  • FIG. 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within the coverage area. This application The embodiment does not limit this.
  • the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.
  • network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.
  • the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices.
  • the communication device may include a network device 110 and a terminal device 120 with a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities, and other network entities, which are not limited in the embodiments of the present application.
  • the self-interference signals in the terminal equipment can be roughly divided into the following three categories according to their sources.
  • the first type of self-interfering signal may be harmonic or intermodulation interference generated by one or several transmitted signals of the communication system.
  • it may be harmonic or intermodulation interference generated by one or several transmitted signals of a cellular communication system.
  • the second type of self-interference signal comes from the interference between different wireless communication modules inside the mobile phone, for example, the interference between WiFi signals and cellular signals.
  • the third type of self-interference signal mainly originates from the electromagnetic waves generated by some active electronic devices inside the terminal.
  • the electromagnetic waves generated by devices such as the display screen of the terminal device, the memory reading operation of the terminal device, the camera and the electric motor of the terminal device.
  • the frequency range of the electromagnetic wave may be tens of MHz to hundreds of MHz.
  • the electromagnetic wave will receive the cellular frequency band Interference.
  • the embodiment of the present application does not specifically limit the type of self-interference of the terminal device. That is to say, when the terminal device in the embodiment of the present application performs self-interference cancellation, it may be performed on at least one of the first-type self-interference signal, the second-type self-interference signal, and the third-type self-interference signal. eliminate.
  • the uplink signals of these carriers may interfere with the downlink received signals of some carriers. Assuming that carrier F1 works in the low frequency band and carrier F2 works in the high frequency band, there may be the following three different types of mutual interference.
  • the frequency of a certain order intermodulation signal (IM) of the uplink carrier of F1 and the uplink carrier of F2 overlaps or partially overlaps with the frequency of the downlink signal of a carrier F3, then carriers F1 and F2 constitute F3 interference.
  • F3 may be one of the carriers F1 or F2, or another carrier different from F1 and F2 (in this case, the terminal may work on more than two carriers at the same time).
  • a UE is configured with LTE carrier and NR carrier (3400-3800MHz) of Band 1 and Band 7 at the same time, if the UL of band 7 and the UL of NR are transmitted at the same time, the resulting 5th order intermodulation effect will affect band 1.
  • LTE carrier and NR carrier (3400-3800MHz) of Band 1 and Band 7 at the same time, if the UL of band 7 and the UL of NR are transmitted at the same time, the resulting 5th order intermodulation effect will affect band 1.
  • NR carrier 3400-3800MHz
  • the frequency multiplication of the uplink carrier of F1 overlaps or partially overlaps with the frequency of the downlink signal of F2, then the carrier F1 constitutes harmonic interference to F2.
  • the uplink carrier range of LTE Band 3 is 1710-1785MHz, and its 2nd order harmonic range is 3420-3570MHz. If a terminal device simultaneously performs LTE uplink transmission on band 3 and DL reception on the NR band 3400-3800 MHz, the second-order harmonics may interfere with the sensitivity of NR's DL receiver.
  • the frequency multiplier of F1's downlink carrier overlaps or partially overlaps with F2's uplink signal frequency (and its adjacent frequencies), then carrier F2 constitutes harmonic intermodulation interference to F1.
  • the downlink carrier range of LTE Band 3 is 1805-1880MHz, and its 2nd order harmonic range is 3610-3760MHz. If a terminal device simultaneously performs LTE downlink reception on band 3 and uplink transmission on the NR band 3400-3800 MHz, the second-order harmonic intermodulation of NR may interfere with the sensitivity of the LTE DL receiver.
  • the terminal device Since the above-mentioned interference is generated inside the terminal device, if the terminal device can eliminate the above-mentioned self-interference, the performance of the terminal and the system will be greatly improved.
  • the basic principle of self-interference cancellation on the terminal device side is to couple or sample a part of the transmitted signal as a reference signal, and then apply corresponding gain, delay and phase adjustments to the reference signal to construct the same power as the actual self-interference signal and opposite phase Of the cancellation signal, and finally achieve destructive interference cancellation of the self-interference signal at the receiving end.
  • the above process is essentially to implement a self-interference reconstruction model inside the terminal equipment.
  • the self-interference cancellation technology on the terminal device side can be divided into digital and analog.
  • the radio frequency signal transmitted from the terminal side is directly sampled, the interference signal is reconstructed by the sampling signal, and then eliminated at the radio frequency front end.
  • the transmitted signal is sampled through the baseband signal, the interference signal is reconstructed on the baseband, and then eliminated on the baseband. Regardless of which technique is used, it depends on sampling the transmitted signal and then reconstructing it into an interference signal in some way to cancel the actual interference signal.
  • uplink signals usually have an advance in time than downlink signals, as shown in Figure 2.
  • the network device configures TA values for the different terminal devices, and the TA value represents the advance time of the uplink signal relative to the downlink signal.
  • the TA value can be determined by the following formula (1):
  • the transmission and reception signals are not synchronized in time on the terminal device side.
  • the difference in time between the upstream and downstream signals is not synchronized in time on the terminal device side.
  • this difference exists between the uplink and downlink signals between different frequency bands.
  • one downlink symbol is subject to interference from two uplink symbols in time sequence.
  • the downstream symbol i is interfered by the upstream symbols j and j+1.
  • two uplink interference symbols, upstream symbols j and j+1 are sampled before and after, and then two interference signals are reconstructed.
  • the embodiments of the present application provide a method for self-interference cancellation, which can be used by a terminal device to synchronize uplink symbols and downlink symbols, thereby simplifying the complexity of the self-interference cancellation algorithm.
  • FIG. 4 shows a schematic flowchart of a method 200 for self-interference cancellation according to an embodiment of the present application.
  • the method 200 may be executed by a terminal device, for example, any terminal device shown in FIG. 1.
  • the uplink signal carried by the first uplink symbol of the terminal device and the downlink signal carried by the first downlink symbol may cause self-interference.
  • the first uplink symbol may be any uplink symbol, and the first downlink symbol may also be Any downstream symbol.
  • the method 200 includes: S210.
  • the terminal device sends time information to the network device, where the time information includes a first duration, where the first duration indicates that the start time of the first uplink symbol is greater than that of the first The start time of the downlink symbol is earlier than the first duration.
  • the duration of the uplink symbol and the duration of the downlink symbol in the embodiment of the present application are equal, and the duration of multiple uplink symbols is also equal, and the duration of multiple downlink symbols is also equal.
  • the duration of each uplink symbol and downlink symbol is represented as T here.
  • the network device since the network device configures the TA value for the terminal device, the uplink signal and the downlink signal are not synchronized, and for an uplink symbol and a downlink symbol that may cause self-interference, the starting time of the two There will be a time difference between them, and the terminal device may send time information to the network device, and the time information is used to indicate the time difference.
  • the terminal device determines one uplink symbol and one downlink symbol that generate self-interference, that is, the first uplink symbol and the first downlink symbol, where the first uplink symbol may be any uplink symbol, corresponding to the downlink
  • the symbol is a downstream symbol that generates self-interference with the first upstream symbol.
  • the time information sent by the terminal device to the network device includes a first duration, and the first duration refers to that the start time of the first uplink symbol is earlier than the start time of the first downlink symbol, so , For selecting any one of the uplink symbols as the first uplink symbol, if the first uplink symbol corresponds to two downlink symbols causing self-interference, the downlink symbol whose start time is later than the first uplink symbol is selected as the first downlink symbol .
  • the first uplink symbol is selected as the uplink symbol j+1 in FIG. 3.
  • both the downlink symbols i and i+1 in FIG. 3 generate self-interference with the uplink symbol j+1
  • the downlink symbol whose starting time is later than the uplink symbol j+1 is selected as the first downlink symbol, that is, the downlink symbol i+1 bit is the first downlink symbol.
  • the first uplink symbol is selected as the uplink symbol j in FIG. 3
  • the first downlink symbol is the downlink symbol i in FIG. 3; if the first uplink symbol is selected as the uplink symbol j+2 in FIG.
  • the first downlink symbol is the downlink symbol i+2 in FIG. 3.
  • the uplink symbol j in FIG. 3 is used as the first uplink symbol
  • the downlink symbol i is used as the first downlink symbol as an example for illustration.
  • the difference T 1 between the starting times of the two is the first duration.
  • the first duration in the embodiment of the present application is less than or equal to the duration T of the uplink symbol or the downlink symbol.
  • the time information sent by the terminal device to the network device may further include first position sub-information and/or second position sub-information, where the first position sub-information indicates the position of the first uplink symbol in the time domain , The second position sub-information indicates the position of the first downlink symbol in the time domain.
  • the terminal device may determine the number of the time slot where the first uplink symbol is located, and the position or number of the first uplink symbol in the time slot.
  • the time slot is referred to as an uplink time slot, and the first position
  • the sub-information may include the number of the uplink time slot where the first uplink symbol is located and/or the number of the first uplink symbol in the uplink time slot.
  • the terminal device may also correspondingly determine the number of the time slot in which the first downlink symbol is located, and the position or number of the first downlink symbol in the time slot.
  • the second location sub-information may include the number of the downlink time slot where the first downlink symbol is located and/or the number of the first downlink symbol in the downlink time slot, and the embodiments of the present application are not limited thereto.
  • the method 200 may further include: the terminal device receives indication information sent by the network device, and the indication information is used to instruct the terminal device to adjust and send the The starting moment of the first uplink symbol.
  • the indication information may be used to indicate the adjustment duration, so that the terminal device adjusts the start time of the first uplink symbol according to the adjustment duration, that is, advances or delays the start time of the first uplink symbol; or, The indication information may also be used to indicate a TA value, where the TA value is the updated TA value configured by the network device for the terminal device, and the starting time of the first uplink symbol is adjusted by adjusting the TA value.
  • the indication information may be used to indicate an adjustment duration, which is less than the duration of the first uplink symbol.
  • the network device acquires the first duration sent by the terminal device; determines the adjustment duration based on the first duration, where the adjustment duration is less than or equal to the first duration; the terminal device acquires the adjustment duration, and based on the adjustment duration, Adjust the start time of the first uplink symbol transmission.
  • the terminal device may postpone the start time of the first uplink symbol according to the adjustment duration, that is, send the first uplink symbol postponed, so that after the delayed transmission, the start time of the first uplink symbol and the first The time difference between the starting moments of a downlink symbol is reduced.
  • the terminal device determines the adjustment duration, and at the same time, it can also determine to delay sending the first uplink symbol by itself, or the network device instructs the terminal device to delay sending the first uplink symbol through the sent indication information.
  • the first uplink symbol is the uplink symbol j
  • the first downlink symbol is the downlink symbol i.
  • the start time of the uplink symbol j and the downlink symbol The difference between the starting moments of i is the first duration; assuming that the adjustment duration is equal to the first duration T 1 , that is, the terminal device delays sending the uplink symbol j after the delay is equal to the first duration T 1 , then after the delayed transmission, that is As shown in FIG. 5, there is no time difference between the start time of the uplink symbol j and the start time of the downlink symbol i, that is, the uplink symbol j is aligned with the downlink symbol i.
  • the downlink symbol i is only interfered by the uplink symbol j.
  • the uplink symbol j needs to be sampled, which reduces the complexity of self-interference cancellation.
  • the terminal device may adjust the start time of the first uplink symbol by adjusting the start time of the time slot in which the first uplink symbol is located.
  • the TA value is the difference between the start time of the time slot where the first uplink symbol is located and the start time of the time slot where the lower row symbol is located, that is The TA value results in a time difference of a first duration between the start time of the first uplink symbol and the start time of the first downlink symbol, then the terminal device may subtract the value TA' after adjusting the TA for the TA value As the adjusted TA value, and according to the adjusted TA value TA′, the time slot in which the first uplink symbol is located is sent, so that the delayed time of the adjusted first uplink symbol is equal to the adjusted duration ⁇ .
  • the terminal device may also advance the start time of the first uplink symbol according to the adjustment duration, that is, send the first uplink symbol in advance, so that after the early transmission, the end time of the first uplink symbol and the first downlink symbol
  • the time difference between the start times of the symbols decreases, that is, the time difference between the start time of the next uplink symbol adjacent to the first uplink symbol and the start time of the first downlink symbol decreases.
  • the terminal device determines the adjustment duration, and at the same time, can also determine to send the first uplink symbol in advance by itself, or the network device instructs the terminal device to send the first uplink symbol in advance through the sent indication information.
  • the first uplink symbol is the uplink symbol j
  • the first downlink symbol is the downlink symbol i.
  • the start time of the uplink symbol j and the downlink symbol The difference between the starting moments of i is the first duration; assuming that the adjustment duration is equal to the first duration and the terminal device sends the uplink symbol j in advance, then the duration of the advance transmission is equal to the duration T of the first uplink symbol and the first duration the difference T 1, then after transmitting in advance, i.e., as shown in FIG.
  • the difference does not exist between the start time and end time of the uplink symbol j downlink symbol i, i.e., the start time of uplink symbols and downlink j + 1
  • the beginning of the symbol i is aligned.
  • the downlink symbol i is only interfered by the uplink symbol j+1.
  • the uplink symbol j+1 needs to be sampled, which reduces the complexity of self-interference cancellation.
  • the terminal device may also adjust the start time of the first uplink symbol by adjusting the start time of the time slot where the first uplink symbol is located.
  • the TA value is the difference between the start time of the time slot where the first uplink symbol is located and the start time of the time slot where the lower row symbol is located, that is The TA value results in a time difference of a first duration between the start time of the first uplink symbol and the start time of the first downlink symbol
  • the terminal device may add the TA value to the uplink symbol duration T and then subtract the adjustment
  • FIG. 5 and FIG. 6 take the adjustment duration equal to the first duration as an example for description, but because the adjustment of the uplink TA involves uplink synchronization, the uplink synchronization often involves multiple uplink terminal devices, and sometimes involves Due to the uplink synchronization process to multiple cells, the network device may not agree to adjust according to the size of the first duration reported by the terminal device. Therefore, the network device may set the adjustment duration to be slightly smaller than the first duration, so that the adjustment duration is as small as possible from the first duration.
  • the network device may send indication information to the terminal device to include the first duration, or may also include instructing the terminal device to send the uplink symbol in advance or later; or, the indication The information may not include the first duration, that is, the indication information is only used to instruct the terminal device to send the uplink symbol in advance or later. At this time, the indication information indicates that the adjustment duration is equal to the first duration. If the adjustment duration is less than the first duration, the indication information sent by the network device to the terminal device includes the adjustment duration, or it may also include instructions to the terminal device to send the uplink symbol earlier or later.
  • the indication information may also be used to indicate a TA value, and the TA value is determined by the network device according to the first duration.
  • the terminal device obtains the TA value configured by the network device, determines the first duration between the first uplink symbol and the first downlink symbol according to the TA value, and sends the first duration to the network device.
  • the TA value is updated for a period of time; the terminal device receives the instruction information sent by the network device, obtains the updated TA value according to the instruction information, and sends the first uplink symbol according to the updated TA value. It can also be said that according to the update
  • the time slot where the first uplink symbol is sent after the last TA value is not limited to this embodiment of the present application.
  • the original TA value another TA value used by the terminal device to determine the first duration
  • the updated TA value is determined by the network device according to the first duration.
  • the network device may increase or decrease the original TA value according to the first duration, and then determine the updated TA value.
  • the first uplink symbol is the uplink symbol j
  • the first downlink symbol is the downlink symbol i.
  • the terminal device can determine the uplink The difference between the start time of symbol j and the start time of downlink symbol i is the first duration; assuming that the adjustment duration is equal to the first duration T 1 and the updated TA value is less than the original TA value, the terminal device adjusts according to the updated TA value After that, as shown in FIG. 5, there is no time difference between the start time of the uplink symbol j and the start time of the downlink symbol i, that is, the uplink symbol j is aligned with the downlink symbol i.
  • the downlink symbol i is only interfered by the uplink symbol j.
  • the uplink symbol j needs to be sampled, which reduces the complexity of self-interference cancellation.
  • the first uplink symbol is the uplink symbol j
  • the first downlink symbol is the downlink symbol i.
  • the start time of the uplink symbol j and the downlink symbol The difference between the starting moments of i is the first duration; assuming that the adjustment duration is equal to the first duration T 1 and the updated TA value is greater than the original TA value, after the terminal device adjusts according to the updated TA value, as shown in FIG. 6, There is no time difference between the end time of the uplink symbol j and the start time of the downlink symbol i, that is, the start time of the uplink symbol j+1 is aligned with the start time of the downlink symbol i.
  • the downlink symbol i is only interfered by the uplink symbol j+1.
  • the uplink symbol j+1 needs to be sampled, which reduces the complexity of self-interference cancellation.
  • the adjustment duration may be equal to the first duration as an example.
  • the uplink synchronization often involves multiple uplink terminal devices, and sometimes The uplink synchronization process of multiple cells is involved, so the network device may not agree to adjust the TA value according to the size of the first time duration reported by the terminal device. Therefore, when determining the updated TA value, the network device may set the adjustment duration to be slightly smaller than the first duration, so that the adjustment duration is as small as possible from the first duration.
  • configuring the TA value (including either the original TA value or the updated TA value) of the terminal device by the network device in this document may include: the network device directly configuring the specific TA value for the terminal device; or may also indicate the network
  • the device configures the terminal device with relevant parameters for calculating the TA value, and the terminal device can calculate the TA value according to the formula.
  • the network device configures the value of N TA in formula (1) for the terminal device, and the terminal device calculates the TA value according to formula (1).
  • the embodiments of the present application are not limited thereto.
  • the terminal device may sample and reconstruct the interference signal according to the adjusted positions of the first uplink symbol and the first downlink symbol, and then perform self-interference cancellation .
  • the terminal device responds to the first uplink symbol
  • the symbol is sampled; according to the sampling result, the interference signal is reconstructed; and according to the reconstructed interference signal, the uplink signal carried by the first uplink symbol and the downlink signal carried by the first downlink symbol are subjected to self-interference cancellation.
  • the first uplink symbol is the uplink symbol j
  • the first downlink symbol is the downlink symbol i
  • the delay time of the start time of the uplink symbol j is equal to the adjustment duration, so that the start of the uplink symbol j
  • the time basically coincides with the start time of the downlink symbol i.
  • the downlink symbol i is only interfered by the uplink symbol j.
  • the uplink symbol j needs to be sampled, which reduces the complexity of self-interference cancellation.
  • the terminal device samples the next uplink symbol of the first uplink symbol, the next uplink symbol is located after the first uplink symbol and is The uplink symbol adjacent to the first uplink symbol; according to the sampling result, reconstruct the interference signal; based on the reconstructed interference signal, perform self-interference cancellation on the uplink signal carried by the next uplink symbol and the downlink signal carried by the first downlink symbol.
  • the first uplink symbol is the uplink symbol j
  • the first downlink symbol is the downlink symbol i
  • the start time of the start timing of the uplink symbol j is equal to the difference between the first uplink symbol duration T and the adjusted duration , So that the end time of the uplink symbol j basically coincides with the start time of the downlink symbol i, then when self-interference cancellation is performed, the downlink symbol i is only interfered by the uplink symbol j+1.
  • the uplink symbol j+1 needs to be sampled, which also reduces the complexity of self-interference cancellation.
  • the terminal device determines the time difference between the start time of the uplink symbol and the downlink symbol that generate self-interference, and sends the time difference to the network device, so that the network device can indicate the The terminal device adjusts the start position of the uplink symbol so that after the adjustment, the start time or end time of the uplink symbol coincides with the start time of the downlink symbol as much as possible, so as to achieve the effect of time synchronization, thus self-interference for analog or digital
  • the cancellation algorithm in order to eliminate the interference received by a downlink symbol, only one uplink symbol needs to be sampled, which reduces the complexity of self-interference cancellation.
  • FIG. 7 shows a schematic flowchart of a method 300 for self-interference cancellation according to an embodiment of the present application.
  • the method 300 may be performed by a network device, for example, the network device shown in FIG. 1.
  • the method 300 includes: S310.
  • the network device receives time information sent by the terminal device, and the time information includes a first duration, where the first duration indicates that the start time of the first uplink symbol is greater than the first The start time of the downlink symbol is earlier than the first duration, and the uplink signal carried by the first uplink symbol and the downlink signal carried by the first downlink symbol may cause self-interference.
  • the method 300 further includes: the network device sends indication information to the terminal device, where the indication information is based on the network device If the duration is determined, the indication information is used to instruct the terminal device to adjust the start time of sending the first uplink symbol.
  • the first duration is less than the duration of the first uplink symbol.
  • the time information further includes: first position sub-information and/or second position sub-information, the first position sub-information represents the position of the first uplink symbol in the time domain, and the first The second position sub-information indicates the position of the first downlink symbol in the time domain.
  • the first position sub-information includes the number of the uplink time slot where the first uplink symbol is located and the number of the first uplink symbol in the uplink time slot
  • the second The location sub-information includes the number of the downlink time slot where the first downlink symbol is located and the number of the first downlink symbol in the downlink time slot.
  • the indication information is used to indicate an adjustment duration, which is less than the duration of the first uplink symbol.
  • the adjustment duration is less than or equal to the first duration.
  • the indication information is used to indicate the timing advance TA value.
  • the network device in the method 300 is equivalent to the network device in the method 200 and can perform the corresponding steps and processes; the terminal device in the method 300 is equivalent to the terminal device in the method 200 and can perform the corresponding steps and processes For the sake of brevity, I will not repeat them here.
  • the terminal device determines the time difference between the start time of the uplink symbol and the downlink symbol that generate self-interference, and sends the time difference to the network device, so that the network device can indicate the The terminal device adjusts the start position of the uplink symbol so that after the adjustment, the start time or end time of the uplink symbol coincides with the start time of the downlink symbol as much as possible, so as to achieve the effect of time synchronization, thus self-interference for analog or digital
  • the cancellation algorithm in order to eliminate the interference received by a downlink symbol, only one uplink symbol needs to be sampled, which reduces the complexity of self-interference cancellation.
  • the terminal device 400 includes: a processing unit 410 and a transceiver unit 420.
  • the transceiver unit 420 is used to: send time information to a network device, the time information includes a first duration, The first duration indicates that the start time of the first uplink symbol is earlier than the start time of the first downlink symbol by the first time, the uplink signal carried by the first uplink symbol and the downlink carried by the first downlink symbol The signal is self-interfering.
  • the processing unit 410 may be used to: generate the time information.
  • the transceiver unit 420 is further configured to: after sending time information to the network device, receive indication information sent by the network device, where the indication information is used to instruct the terminal device to adjust and send the first uplink The starting moment of the symbol.
  • the first duration is less than the duration of the first uplink symbol.
  • the time information further includes: first position sub-information and/or second position sub-information, the first position sub-information represents the position of the first uplink symbol in the time domain, and the first The second position sub-information indicates the position of the first downlink symbol in the time domain.
  • the first location sub-information includes the number of the uplink time slot where the first uplink symbol is located and the number of the first uplink symbol in the uplink time slot
  • the second The location sub-information includes the number of the downlink time slot where the first downlink symbol is located and the number of the first downlink symbol in the downlink time slot.
  • the indication information is used to indicate an adjustment duration, which is less than the duration of the first uplink symbol.
  • the adjustment duration is less than or equal to the first duration.
  • the transceiver unit 420 is further configured to delay sending the first uplink symbol, and the delay time of the start time of the first uplink symbol is equal to the adjustment time length.
  • the transceiver unit 420 is further configured to send the first uplink symbol in advance, and the advance time of the first uplink symbol is equal to the difference between the duration of the first uplink symbol and the adjusted duration.
  • the indication information is used to indicate a timing advance TA value, and the TA value is determined by the network device according to the first duration.
  • the processing unit 410 is configured to: according to the TA value, adjust the start time of the time slot in which the first uplink symbol is sent.
  • the start time of the first uplink symbol is delayed by a delay time equal to the first time duration.
  • the start time of the first uplink symbol is advanced, and the advance time is equal to the duration of the first uplink symbol and The difference in the first duration.
  • the processing unit 410 is configured to: sample the first uplink symbol; reconstruct the interference signal according to the sampling result; and according to the reconstructed interference signal, the uplink signal carried by the first uplink symbol and The downlink signal carried by the first downlink symbol performs self-interference cancellation.
  • the processing unit 410 is configured to: sample the next uplink symbol of the first uplink symbol, where the next uplink symbol is located after the first uplink symbol and is connected to the first uplink symbol Adjacent uplink symbols; according to the sampling result, reconstruct the interference signal; based on the reconstructed interference signal, perform self-interference cancellation on the uplink signal carried by the next uplink symbol and the downlink signal carried by the first downlink symbol.
  • terminal device 400 may correspond to performing the method 200 in the embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 400 are respectively for realizing FIGS. 1 to 7
  • the corresponding process of the terminal device in each method in the method will not be repeated here for brevity.
  • the terminal device determines the time difference between the starting time of the uplink symbol and the downlink symbol that cause self-interference, and sends the time difference to the network device, so that the network device instructs the terminal device to adjust the start of the uplink symbol
  • the starting position is such that after the adjustment, the start time or end time of the uplink symbol coincides with the start time of the downlink symbol as much as possible, so as to achieve the effect of time synchronization, so that for the analog or digital self-interference cancellation algorithm, in order to eliminate Only one uplink symbol needs to be sampled for the interference received by one downlink symbol, which reduces the complexity of self-interference cancellation.
  • the network device 500 includes: a processing unit 510 and a transceiver unit 520.
  • the transceiver unit 520 is configured to: receive time information sent by the terminal device, and the time information includes the first Duration, where the first duration indicates that the start time of the first uplink symbol is earlier than the start time of the first downlink symbol by the first duration, the uplink signal carried by the first uplink symbol and the first downlink symbol
  • the downstream signal is self-interfering.
  • the transceiver unit 520 is further configured to: after receiving the time information sent by the terminal device, send instruction information to the terminal device, where the instruction information is determined by the network device according to the first duration , The indication information is used to instruct the terminal device to adjust the starting moment of sending the first uplink symbol.
  • the processing unit 510 is further configured to: generate the indication information.
  • the first duration is less than the duration of the first uplink symbol.
  • the time information further includes: first position sub-information and/or second position sub-information, the first position sub-information represents the position of the first uplink symbol in the time domain, and the first The second position sub-information indicates the position of the first downlink symbol in the time domain.
  • the first location sub-information includes the number of the uplink time slot where the first uplink symbol is located and the number of the first uplink symbol in the uplink time slot
  • the second The location sub-information includes the number of the downlink time slot where the first downlink symbol is located and the number of the first downlink symbol in the downlink time slot.
  • the indication information is used to indicate an adjustment duration, which is less than the duration of the first uplink symbol.
  • the adjustment duration is less than or equal to the first duration.
  • the indication information is used to indicate the timing advance TA value.
  • the network device 500 may correspond to performing the method 300 in the embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the network device 500 are respectively for realizing FIGS. 1 to 7
  • the corresponding process of the network device in each method in the method will not be repeated here for brevity.
  • the network device of the embodiment of the present application receives the time difference between the starting time of the uplink symbol and the downlink symbol generated by the self-interference sent by the terminal device, and instructs the terminal device to adjust the starting position of the uplink symbol so that ,
  • the start time or end time of the uplink symbol coincides with the start time of the downlink symbol as far as possible, so as to achieve the effect of time synchronization, so that for the analog or digital self-interference cancellation algorithm, in order to eliminate the interference received by a downlink symbol, Only one uplink symbol needs to be sampled, which reduces the complexity of self-interference cancellation.
  • FIG. 10 is a schematic structural diagram of a communication device 600 provided by an embodiment of the present application.
  • the communication device 600 shown in FIG. 10 includes a processor 610, and the processor 610 can call and run a computer program from the memory to implement the method in the embodiments of the present application.
  • the communication device 600 may further include a memory 620.
  • the processor 610 can call and run a computer program from the memory 620 to implement the method in the embodiments of the present application.
  • the memory 620 may be a separate device independent of the processor 610, or may be integrated in the processor 610.
  • the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, may send information or data to other devices, or receive other Information or data sent by the device.
  • the transceiver 630 may include a transmitter and a receiver.
  • the transceiver 630 may further include antennas, and the number of antennas may be one or more.
  • the communication device 600 may specifically be a network device according to an embodiment of the present application, and the communication device 600 may implement the corresponding process implemented by the network device in each method of the embodiment of the present application. .
  • the communication device 600 may specifically be a mobile terminal/terminal device according to an embodiment of the present application, and the communication device 600 may implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, for simplicity And will not be repeated here.
  • FIG. 11 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • the chip 700 shown in FIG. 11 includes a processor 710, and the processor 710 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the chip 700 may further include a memory 720.
  • the processor 710 can call and run a computer program from the memory 720 to implement the method in the embodiments of the present application.
  • the memory 720 may be a separate device independent of the processor 710, or may be integrated in the processor 710.
  • the chip 700 may further include an input interface 730.
  • the processor 710 can control the input interface 730 to communicate with other devices or chips. Specifically, it can obtain information or data sent by other devices or chips.
  • the chip 700 may further include an output interface 740.
  • the processor 710 can control the output interface 740 to communicate with other devices or chips. Specifically, it can output information or data to other devices or chips.
  • the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the chip can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the chip can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiments of the present application. No longer.
  • chips mentioned in the embodiments of the present application may also be referred to as system-on-chips, system chips, chip systems, or system-on-chip chips.
  • the communication system 800 includes a terminal device 810 and a network device 820.
  • the terminal device 810 can be used to implement the corresponding function implemented by the terminal device in the above method
  • the network device 820 can be used to implement the corresponding function implemented by the network device in the above method.
  • the processor in the embodiments of the present application may be an integrated circuit chip, which has signal processing capabilities.
  • each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software.
  • the aforementioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an existing programmable gate array (Field Programmable Gate Array, FPGA), or other available Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application may be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware decoding processor, or may be executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a mature storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, and registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically Erasable programmable read only memory (Electrically, EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • Synchlink DRAM SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data) SDRAM (DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on.
  • static random access memory static random access memory
  • DRAM dynamic random access memory
  • SDRAM Synchronous dynamic random access memory
  • DDR SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • synchronous connection Dynamic random access memory switch link DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • Embodiments of the present application also provide a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium may be applied to the network device in the embodiments of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiments of the present application.
  • the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiments of the present application.
  • the computer-readable storage medium may be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program causes the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiments of the present application For the sake of brevity, I will not repeat them here.
  • An embodiment of the present application also provides a computer program product, including computer program instructions.
  • the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. Repeat again.
  • the computer program product may be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, For brevity, I will not repeat them here.
  • An embodiment of the present application also provides a computer program.
  • the computer program can be applied to the network device in the embodiment of the present application.
  • the computer program runs on the computer, the computer is allowed to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. And will not be repeated here.
  • the computer program can be applied to the mobile terminal/terminal device in the embodiments of the present application, and when the computer program runs on the computer, the computer is implemented by the mobile terminal/terminal device in performing various methods of the embodiments of the present application For the sake of brevity, I will not repeat them here.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical, or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

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Abstract

La présente invention se rapporte, selon les modes de réalisation, à un procédé destiné à être utilisé dans une annulation d'auto-brouillage, à un dispositif terminal et à un dispositif de réseau. Le procédé consiste : à transmettre, au moyen d'un dispositif terminal, des informations temporelles à un dispositif de réseau, les informations temporelles comprenant une première durée, la première durée exprimant que le moment de début d'un premier symbole de liaison montante arrive avant le moment de début d'un premier symbole de liaison descendante par la première durée, et un signal de liaison montante transporté par le premier symbole de liaison montante et un signal de liaison descendante transporté par le symbole de liaison descendante générant un auto-brouillage. Le procédé destiné à être utilisé dans une annulation d'auto-brouillage, le dispositif terminal et le dispositif de réseau des modes de réalisation de la présente invention permettent la mise en œuvre dans laquelle le dispositif de réseau acquiert la différence de temps entre le symbole de liaison montante et le symbole de liaison descendante qui génèrent un auto-brouillage de telle sorte que le dispositif terminal peut synchroniser le symbole de liaison montante et le symbole de liaison descendante, ce qui permet de réduire la complexité d'auto-brouillage.
PCT/CN2018/124638 2018-12-28 2018-12-28 Procédé destiné à être utilisé dans une annulation d'auto-brouillage, dispositif terminal et dispositif de réseau Ceased WO2020133145A1 (fr)

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PCT/CN2018/124638 WO2020133145A1 (fr) 2018-12-28 2018-12-28 Procédé destiné à être utilisé dans une annulation d'auto-brouillage, dispositif terminal et dispositif de réseau

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