WO2022012396A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2022012396A1
WO2022012396A1 PCT/CN2021/105082 CN2021105082W WO2022012396A1 WO 2022012396 A1 WO2022012396 A1 WO 2022012396A1 CN 2021105082 W CN2021105082 W CN 2021105082W WO 2022012396 A1 WO2022012396 A1 WO 2022012396A1
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WIPO (PCT)
Prior art keywords
information
terminal device
network device
parameter configuration
dci
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PCT/CN2021/105082
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English (en)
Chinese (zh)
Inventor
余雅威
郭志恒
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华为技术有限公司
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Publication of WO2022012396A1 publication Critical patent/WO2022012396A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0073—Allocation arrangements that take into account other cell interferences

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method and apparatus.
  • wireless spectrum resources have become increasingly scarce.
  • multiple systems using different wireless access technologies are usually deployed in the same frequency band at the same time.
  • the frequency band below 6 GHz can be deployed at the same time for systems using long term evolution (LTE) radio access technology and 5G New Radio (5G NR) radio access technology.
  • LTE long term evolution
  • 5G NR 5G New Radio
  • a reference signal sent by a cell of one of the systems may cause interference to other communication systems.
  • Embodiments of the present application provide a communication method and apparatus, which are used to solve the problem that a terminal device is interfered by a reference signal from another communication system when receiving a signal of one communication system.
  • a first aspect provides a communication method, characterized by comprising: a terminal device receiving first information from a first system.
  • the first information is used to indicate the parameter configuration of the reference signal of the second system.
  • the first system adopts a first radio access technology
  • the second system adopts a second radio access technology
  • the first radio access technology is different from the second radio access technology.
  • the first information indicating the parameter configuration of the reference signal of the second system is sent to the terminal device by the network device in the first system, so that the terminal device can determine the parameter configuration of the reference signal of the second system.
  • the terminal device can obtain the reference signal of the second system according to the parameter configuration of the reference signal of the second system, and it is possible to reduce the interference of the reference signal to the received signal of the first system.
  • the terminal device may suppress interference from the reference signal of the second system from the received signal by reconstructing the reference signal of the second system according to the parameter configuration of the reference signal of the second system.
  • the terminal device before the terminal device receives the first information from the network device of the first system, when the channel quality of the downlink signal is lower than a preset threshold, the terminal device sends the second information to the network device.
  • the second information is used to indicate to the network device that the terminal device needs the network device to send the first information.
  • the network device of the first system can send the above-mentioned first information to the terminal device after receiving the second information, and when the terminal device suffers less interference (that is, the channel quality of the terminal device is better)
  • the device does not need to send the second information to the network device of the first system, nor does the network device need to send the first information to the terminal device, thereby reducing the occupation of air interface resources.
  • the method may further include: the terminal device sends third information to the network device of the first system.
  • the third information is used to indicate to the network device of the first system the number of interference signals processed by the terminal device, where the interference signals are reference signals of the second system.
  • the network device can determine the parameter configuration for sending several reference signals in the second system to the terminal device according to the number of interference signals processed by the terminal device indicated by the third information.
  • the third information is specifically used to indicate the maximum number of interference signals that the terminal device can handle.
  • the terminal device may determine, according to its own processing capability, that the terminal device can reduce the interference of the reference signals from N second systems at a maximum, that is, the maximum number of interference signals that the terminal device can process is N; The device sends third information indicating the number N.
  • the network device can determine that the terminal device can process a maximum of N interference signals, so as to send the parameter configuration of the reference signals of the second system to the terminal device whose number matches the processing capability of the terminal device.
  • the network device after determining that the terminal device can handle a maximum of N interference signals, the network device sends the parameter configurations of N reference signals of the second system to the terminal device; for another example, after the network device determines that the terminal device can handle a maximum of N interference signals , sending less than N parameter configurations of reference signals of the second system to the terminal device.
  • the third information is specifically used to indicate the number of interference signals that the terminal device needs to process.
  • the terminal device may determine, according to information such as the channel quality of the current downlink channel, the number M of reference signals of the second system that interfere with the terminal device, that is, determine the number M of interference signals that the terminal device needs to process.
  • the terminal device then sends third information indicating the number M to the network device.
  • the network device can determine that the terminal device needs to process the M interference signals, so as to send to the terminal device the parameter configuration of the reference signals of the second system whose number matches the number required by the terminal device.
  • the terminal device receiving the first information from the network device of the first system includes: the terminal device receiving the first radio resource control (radio resource control, RRC) signaling from the network device of the first system .
  • the first RRC signaling includes first information, which is used to indicate the configuration information of the reference signal of the second system.
  • the method may further include: : The terminal device receives the first downlink control information (Downlink Control Information, DCI) from the network device.
  • DCI Downlink Control Information
  • the first DCI is used to instruct the terminal device to activate the parameter configuration.
  • the DCI sent by the network device can be used to activate the interference suppression, thereby improving the downlink reception and demodulation performance.
  • the interference suppression is not required, the DCI can be deactivated through the DCI sent by the network device, and the interference suppression is no longer performed, thereby reducing the energy consumption caused by the interference suppression.
  • the terminal device receiving the first information from the network device of the first system may include: the terminal device receiving the second DCI from the network device of the first system.
  • the second DCI includes the first information.
  • the above parameter configuration includes a first parameter configuration and a second parameter configuration.
  • the terminal device receiving the first information from the network device of the first system may include: the terminal device receiving the second RRC signaling and the third DCI from the network device of the first system, where the second RRC signaling includes a signal for indicating the first parameter configuration information; the third DCI includes information used to indicate the second parameter configuration.
  • the information about the slow change frequency or the large occupation overhead in the parameter configuration can be used as the first parameter configuration, which is carried in the RRC signaling for transmission; the information about the fast change frequency or the small occupation overhead in the parameter configuration can be used as the second parameter configuration.
  • the bearer is sent on DCI signaling. It can not only take advantage of the small transmission delay of DCI to ensure fast transmission of information with small overhead or change frequency in parameter configuration, but also avoid excessive occupation of DCI overhead.
  • the above parameter configuration may include time-frequency location indication information of the reference signal and indication information of a reference signal generation parameter.
  • the above parameter configuration includes one or more of the following parameters: the physical cell identifier PCI of the second cell in the second system, the subframe number offset value corresponding to the cell-specific reference signal CRS, the number of antenna ports, and the system bandwidth , the central subcarrier position, the type of cyclic prefix, and the time-frequency position of the MBSFN subframe for multicast/multicast single frequency network.
  • the terminal device can use the above parameters in the parameter configuration to reconstruct the CRS of the second cell, so as to realize the interference cancellation of the CRS of the second cell, and achieve the effect of interference suppression for the signal from the first system .
  • the above-mentioned first radio access technology is LTE technology
  • the second radio access technology is 5G NR technology. Based on the above design, when the terminal device receives the signal from the 5G NR system, it can suppress the interference of the signal from the LTE system.
  • a communication method including: a network device of a first system sending first information to a terminal device.
  • the first information is used to indicate the parameter configuration of the reference signal of the second system.
  • the first system adopts a first radio access technology
  • the second system adopts a second radio access technology
  • the first radio access technology is different from the second radio access technology.
  • the first information indicating the parameter configuration of the reference signal of the second system is sent to the terminal device by the network device in the first system, so that the terminal device can determine the parameter configuration of the reference signal of the second system.
  • the terminal device can suppress the generation of the reference signal of the second system when receiving the signal from the first system by reconstructing the reference signal of the second system according to the parameter configuration of the reference signal of the second system. interference.
  • the method further includes: the network device receiving the second information from the terminal device.
  • the second information is used to indicate to the network device that the terminal device needs the network device to send the first information.
  • the network device can send the above-mentioned first information to the terminal device after receiving the second information, and the terminal device does not need to send the first information to the terminal device under the condition that the terminal device suffers less interference (that is, the channel quality of the terminal device is better).
  • the network device of a system sends the second information, and the network device does not need to send the first information to the terminal device, thereby reducing the occupation of air interface resources.
  • the method before the network device of the first system sends the first information to the terminal device, the method further includes: the network device receives third information from the terminal device; the third information is used to send the third information to the terminal device of the first system.
  • the network device indicates the number of interference signals processed by the terminal device, where the above-mentioned interference signals are reference signals of the second system. Based on the above design, the network device can determine the parameter configuration for sending several reference signals in the second system to the terminal device according to the number of interference signals processed by the terminal device indicated by the third information.
  • the third information is specifically used to indicate the maximum number of interference signals that the terminal device can handle.
  • the terminal device may determine, according to its own processing capability, that the terminal device can reduce the interference of the reference signals from N second systems at a maximum, that is, the maximum number of interference signals that the terminal device can process is N; The device sends third information indicating the number N.
  • the network device can determine that the terminal device can process a maximum number of N interference signals, so as to send the parameter configuration of the reference signals of the second system to the terminal device whose number matches the processing capability of the terminal device.
  • the network device after determining that the terminal device can handle a maximum of N interference signals, the network device sends the parameter configurations of N reference signals of the second system to the terminal device; for another example, after the network device determines that the terminal device can handle a maximum of N interference signals , sending less than N parameter configurations of reference signals of the second system to the terminal device.
  • the third information is specifically used to indicate the number of interference signals that the terminal device needs to process.
  • the terminal device may determine, according to information such as the channel quality of the current downlink channel, the number M of reference signals of the second system that interfere with the terminal device, that is, determine the number M of interference signals that the terminal device needs to process.
  • the terminal device then sends third information indicating the number M to the network device.
  • the network device can determine that the terminal device needs to process the M interference signals, so as to send to the terminal device the parameter configuration of the reference signals of the second system whose number matches the number required by the terminal device.
  • sending the first information to the terminal device by the network device of the first system includes: sending the first radio resource control RRC signaling to the terminal device by the network device of the first system.
  • the first RRC signaling includes first information, which is used to indicate the configuration information of the reference signal of the second system to the terminal device.
  • the method further includes: the network device sends the first downlink control information DCI to the terminal device.
  • the first DCI is used to instruct the terminal device to activate the parameter configuration.
  • the DCI sent by the network device can be used to activate the interference suppression, thereby improving the downlink reception and demodulation performance.
  • the interference suppression is not required, the DCI can be deactivated through the DCI sent by the network device, and the interference suppression is no longer performed, thereby reducing the energy consumption caused by the interference suppression.
  • the network device of the first system sending the first information to the terminal device includes: the network device of the first system sending the second DCI to the terminal device.
  • the second DCI includes the first information.
  • the parameter configuration includes a first parameter configuration and a second parameter configuration.
  • the network device of the first system sending the first information to the terminal device includes: the network device of the first system sending the second RRC signaling and the third DCI to the terminal device.
  • the second RRC signaling includes information used to indicate the first parameter configuration;
  • the third DCI includes information used to indicate the second parameter configuration.
  • the information about the slow change frequency or the large occupation overhead in the parameter configuration can be used as the first parameter configuration, which is carried in the RRC signaling for transmission; the information about the fast change frequency or the small occupation overhead in the parameter configuration can be used as the second parameter configuration.
  • the bearer is sent on DCI signaling. It can not only take advantage of the small transmission delay of DCI to ensure fast transmission of information with small overhead or change frequency in parameter configuration, but also avoid excessive occupation of DCI overhead.
  • the parameter configuration includes time-frequency location indication information of the reference signal and indication information of a reference signal generation parameter.
  • the above parameter configuration includes one or more of the following parameters: the physical cell identifier PCI of the second cell in the second system, the offset value of the subframe number corresponding to the cell-specific reference signal CRS, the number of antenna ports, the system bandwidth, the center Subcarrier location, type of cyclic prefix, and time-frequency location of MBSFN subframes for multicast/multicast single frequency network.
  • the terminal device can use the above parameters in the parameter configuration to reconstruct the CRS of the second cell, so as to realize the interference cancellation of the CRS of the second cell, and achieve the effect of interference suppression for the signal from the first system .
  • the first radio access technology is the Long Term Evolution LTE technology.
  • the second radio access technology is 5G new air interface 5G NR technology. Based on the above design, when the terminal device receives the signal from the 5G NR system, it can suppress the interference of the signal from the LTE system.
  • a communication apparatus may be a chip or a system-on-chip of a terminal device.
  • the communication apparatus may implement the above-mentioned first aspect or the functions performed by the terminal device in the possible designs of the first aspect. These functions can be implemented by hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication apparatus may include: a receiving unit to implement related functions of the terminal device.
  • the receiving unit may be configured to receive the first information from the network device of the first system.
  • the first information is used to indicate the parameter configuration of the reference signal of the second system; the first system adopts the first wireless access technology, the second system adopts the second wireless access technology, and the first wireless access technology and the second wireless Access technology is different.
  • the communication apparatus may also include more or less units for implementing other functions of the terminal device.
  • a communication apparatus may be a chip or a system-on-chip of a network device.
  • the communication apparatus may implement the above-mentioned second aspect or the functions performed by the network equipment in the possible designs of the second aspect. These functions can be implemented by hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication apparatus may include: a sending unit to implement related functions of the network equipment.
  • the sending unit may be configured to send the first information to the terminal device.
  • the first information is used to indicate the parameter configuration of the reference signal of the second system.
  • the first system adopts a first radio access technology
  • the second system adopts a second radio access technology
  • the first radio access technology is different from the second radio access technology.
  • the communication apparatus may also include more or less units for implementing other functions of the network device.
  • a communications apparatus including one or more processors coupled to one or more memories.
  • the one or more memories store computer instructions.
  • the one or more processors execute the computer instructions, it causes the communication apparatus to execute the above-mentioned first aspect or the communication method executed by the terminal device in the possible design of the first aspect, or, when the one or more processors
  • the communication apparatus is caused to execute the second aspect or the communication method executed by the network device in the possible design of the second aspect.
  • a sixth aspect provides a computer-readable storage medium, where an instruction is stored in the computer-readable storage medium, and when the instruction is executed, executes the above-mentioned first aspect or the terminal device in the possible design of the first aspect.
  • the communication method or, when the instruction is executed, executes the second aspect or the communication method performed by the network device in the possible design of the second aspect.
  • a seventh aspect provides a computer program product containing instructions that, when run on a computer, enable the computer to execute the first aspect or the communication method performed by the terminal device in the possible design of the first aspect, or to enable the computer to execute the communication method.
  • the computer may execute the above-mentioned second aspect or the communication method executed by the network device in the possible design of the second aspect.
  • a chip system in an eighth aspect, includes a processor and a communication interface, which is used to support a communication device to implement the functions involved in the above aspects.
  • the chip system further includes a memory for storing necessary program instructions and data of the network device. It should be noted that the chip system may be composed of chips, or may include chips and other discrete devices.
  • any design manner of the third aspect to the eighth aspect may correspond to the above-mentioned first aspect and any possible design thereof or the second aspect and any possible design thereof. Similar technical effects are obtained, which will not be repeated here.
  • FIG. 1 is a schematic diagram of a network architecture provided by an embodiment of the present application.
  • FIG. 2 is one of the schematic diagrams of a communication system provided by an embodiment of the present application.
  • FIG. 3 is one of the schematic flowcharts of a communication method provided by an embodiment of the present application.
  • FIG. 4 is the second schematic diagram of a communication system provided by an embodiment of the present application.
  • Fig. 5 is a kind of schematic diagram that CRS occupies RE in subframe
  • FIG. 6 is the second schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 7 is a third schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 8 is a fourth schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 9 is a fifth schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 10 is one of the schematic diagrams of the composition of a communication device according to an embodiment of the present application.
  • FIG. 11 is the second schematic diagram of the composition of a communication device according to an embodiment of the present application.
  • FIG. 12 is a third schematic diagram of the composition of a communication apparatus according to an embodiment of the present application.
  • the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute limitations on the technical solutions provided by the embodiments of the present application.
  • the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • a reference signal also called a pilot signal
  • RS is a known signal provided by the transmitter to the receiver for channel estimation or channel exploration.
  • common reference signals include: Cell-specific Reference Signal (CRS), Channel State Information Reference Signal (CRI-RS), and the like.
  • CRS Cell-specific Reference Signal
  • CRI-RS Channel State Information Reference Signal
  • various reference signals have corresponding functions, and the time-frequency positions and contents of various reference signals also have corresponding generation rules.
  • the CRS of a cell is valid for all terminal equipments in the cell.
  • the functions of CRS include: (1) for channel estimation on downlink physical shared channel (Physical Downlink Shared Channel, PDSCH); (2) for terminal equipment to obtain channel state information (Channel State Information, CSI); (3) CRS-based terminal measurements can be used to assist cell selection and handover.
  • PDSCH Physical Downlink Shared Channel
  • CSI Channel State Information
  • the communication methods provided in the embodiments of the present application can be applied to various communication systems, for example, communication systems using 5G NR technology, LTE technology, or other wireless access technologies.
  • FIG. 1 is a schematic diagram of a network architecture provided by an embodiment of the present application.
  • the network may include: terminal equipment, a radio access network (RAN) or an access network (AN) (RAN and AN are collectively referred to as (R)AN), and a core network ( core network, CN).
  • RAN radio access network
  • AN access network
  • R core network
  • the terminal device may be a device with a wireless transceiver function.
  • the terminal equipment may have different names, such as user equipment (UE), access equipment, terminal unit, terminal station, mobile station, mobile station, remote station, remote terminal, mobile device, wireless communication device, terminal agent or terminal device, etc.
  • Terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle; can also be deployed on water (such as ships, etc.); can also be deployed in the air (such as aircraft, balloons and satellites, etc.).
  • Terminal devices include handheld devices, vehicle-mounted devices, wearable devices or computing devices with wireless communication functions.
  • the terminal device may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function.
  • the terminal device can also be a virtual reality (VR) device, an augmented reality (AR) device, an industrial control terminal, a wireless terminal, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, and a smart grid. wireless terminals, wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the apparatus for implementing the function of the terminal device may be the terminal device, or may be an apparatus capable of supporting the terminal device to implement the function, such as a chip system.
  • the chip system may be composed of chips, and may also include chips and other discrete devices.
  • the (R)AN mainly includes access network equipment.
  • An access network device may also be referred to as a base station.
  • the base station may include various forms of base station. For example: macro base station, micro base station (also called small station), relay station, access point, etc. Specifically, it can be: an access point (AP) in a wireless local area network (Wireless Local Area Network, WLAN), a global system for mobile communications (Global System for Mobile Communications, GSM) or a code division multiple access (Code Division Multiple Access)
  • the base station (Base Transceiver Station, BTS) in Multiple Access (CDMA), the base station (NodeB, NB) in the Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA), or the evolved type in LTE Base station (Evolved Node B, eNB or eNodeB), or relay station or access point, or in-vehicle equipment, wearable device and the next generation node B (The Next Generation Node B, gNB) in 5G network or
  • a base station generally includes a baseband unit (BBU), a remote radio unit (RRU), an antenna, and a feeder for connecting the RRU and the antenna.
  • BBU baseband unit
  • RRU remote radio unit
  • the BBU is used for signal modulation.
  • the RRU is responsible for radio frequency processing.
  • the antenna is responsible for the conversion between the guided traveling waves on the cable and the space waves in the air.
  • the distributed base station greatly shortens the length of the feeder between the RRU and the antenna, which can reduce the signal loss and the cost of the feeder.
  • the RRU plus antenna is relatively small and can be installed anywhere, making network planning more flexible.
  • all BBUs can be centralized and placed in the central office (CO).
  • a base station may include a centralized unit (CU) and a distributed unit (DU).
  • the base station may also include an active antenna unit (AAU).
  • the CU implements some functions of the base station, and the DU implements some functions of the base station.
  • the CU is responsible for processing non-real-time protocols and services, and implementing functions of radio resource control (RRC) and packet data convergence protocol (PDCP) layers.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • the DU is responsible for processing physical layer protocols and real-time services, and implementing functions of the radio link control (RLC), media access control (MAC), and physical (PHY) layers.
  • RLC radio link control
  • MAC media access control
  • PHY physical
  • AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas.
  • the access network device may be a device including one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into network devices in the RAN, and the CU can also be divided into network devices in the core network (core network, CN), which is not limited here.
  • the core network includes multiple core network network elements (or called network function network elements).
  • the core network includes: AMF network elements, session management A session management function (SMF) network element, a PCF network element, a user plane function (UPF) network element, an application layer function (application function) network element, an AUSF network element, and a UDM network element.
  • AMF session management A session management function
  • PCF PCF
  • UPF user plane function
  • application function application function
  • AUSF application function network element
  • UDM UDM network element
  • the core network may also include some network elements not shown in FIG. 1, such as: security anchor function (security anchor function, SEAF) network element, authentication credential repository and processing function (authentication credential repository and processing function, ARPF), The embodiments of the present application will not be repeated here.
  • security anchor function security anchor function, SEAF
  • SEAF security anchor function
  • ARPF authentication credential repository and processing function
  • FIG. 2 it is a schematic diagram of a communication system according to an embodiment of the present application.
  • the communication system includes at least a first system using a first radio access technology and a second system using a second radio access technology.
  • the first radio access technology and the second radio access technology are respectively different technologies in the LTE technology, the 5G NR technology and other technologies.
  • the wireless access technology described in this application may be a new wireless access technology emerging with the development of wireless communication technology, which is not limited in this application.
  • the first system using the first wireless access technology includes: a network device 101 and a terminal device 102 .
  • the terminal device 102 may communicate with the network device 101 within the area a covered by the first cell corresponding to the network device 101 .
  • the second system using the second wireless access technology includes a network device 103 and a terminal device 104 .
  • the terminal device 104 may communicate with the network device 103 within the area b covered by the second cell corresponding to the network device 103 .
  • the network device 101 may be an access network device in (R)AN in FIG. 2 , for example, the network device 101 may be a gNB in a 5G NR system.
  • the network device 103 may be an access network device in the (R)AN of a communication system using a different radio access technology from the first system, for example, the network device 103 may be an LTE system, a WCDMA system, a GSM system, or a CDMA system. access network equipment.
  • the above example shown in FIG. 2 is shown by taking the example that the network devices in the systems adopting different wireless access technologies are not co-located.
  • the network devices in the first system and the second system may also be co-located, that is, the above communication system may include only one network device, and the network device may not only use the first wireless connection
  • the terminal device in the first system using the wireless access technology may provide access service, and the terminal device in the second system using the second wireless access technology may also be provided with the access service.
  • the present embodiment is described in detail by taking as an example that the access network devices in the systems adopting different wireless access technologies do not share the same site.
  • the terminal when the coverage areas of the first cell and the second cell have an overlapping area (the overlapping area is shown as area c in FIG. 2 ), and the frequency band resources used by the first cell and the second cell have shared resources, the terminal When the device 102 receives the downlink signal from the first system in the region c, it may be interfered by the reference signal in the second system.
  • the terminal device 102 may be interfered by reference signals such as cell-specific reference signals and channel state information reference signals from the network device 103 in the LTE system.
  • the LTE terminal device obtains the parameter configuration of the reference signal of the adjacent cell by obtaining the broadcast information, synchronization signal and other content of the adjacent cell, and then reconstructs the reference signal of the adjacent cell. Then, the NR terminal device suppresses the interference of the neighboring cell reference signal existing in the received downlink signal of the serving cell by means of interference cancellation, thereby improving the performance of downlink transmission.
  • the NR terminal equipment obtains the synchronization information of the adjacent cell through the synchronization signal, and then obtains the frame number and subframe number of the CRS; the NR terminal equipment obtains the number of antenna ports of the adjacent cell by reading the broadcast information of the adjacent cell; Read the broadcast information of the neighboring cell to obtain the configuration information such as the Multicast Broadcast Single Frequency Network (MBSFN) of the neighboring cell, and obtain the subframe number of the MBSFN subframe. Then, the LTE terminal device can reconstruct the CRS of the adjacent cell through the above parameter configuration, and then achieve interference suppression through interference cancellation.
  • MBSFN Multicast Broadcast Single Frequency Network
  • the above method can suppress and eliminate the interference of the adjacent cell reference signals in the NR system, when the interference comes from a communication system of a different standard, for example, when the interference comes from the LTE system, it is difficult for the terminal equipment to directly obtain the adjacent cell. Therefore, the parameter configuration of the relevant reference signal cannot be obtained through the above method, and the interference suppression cannot be completed.
  • the terminal device 102 since the terminal device 102 cannot directly obtain the broadcast information and the synchronization signal sent by the network device 103, it cannot obtain the parameter configuration of the reference signal. Interference suppression is thus not possible.
  • the network device 101 may first obtain the parameter configuration of the reference signal of the second cell corresponding to the network device 103 (including parameters used to indicate the time-frequency position of the reference signal and the generation of the signal sequence) ); then the network device 101 sends the above parameter configuration to the terminal device 102 . In this way, the terminal device 102 can use these parameter configurations to reconstruct the reference signal of the second cell, and then implement interference suppression.
  • the method may include the following contents of S201-S202:
  • the network device 101 of the first system sends the first information to the terminal device 102 .
  • the first information is used to indicate the parameter configuration of the reference signal of the second system.
  • the parameter configuration of the reference signal may include: time-frequency position indication information of the reference signal and indication information of the reference signal generation parameter.
  • the time-frequency position indication information is used to indicate the time-domain position and frequency-domain position of the reference signal.
  • the indication information of the reference signal generation parameter is used to indicate the sequence content of the reference signal.
  • the first system and the second system referred to in this application may be understood as two different wireless access technologies. That is to say, the network device of the first system can be understood as a network device that uses a wireless access technology (which may be referred to as the first wireless access technology) to provide access services for terminal devices; the network device of the second system, It can be understood as a network device that uses another wireless access technology (which may be referred to as a second wireless access technology) to provide access services for terminal devices.
  • the first radio access technology and the second radio access technology may be respectively different technologies in LTE technology, 5G NR technology and other technologies.
  • the wireless access technology described in this application may be a new wireless access technology emerging with the development of wireless communication technology, which is not limited in this application.
  • the reference signal of the second system can be understood as a reference signal used by the network device when the second wireless access technology is used to provide an access service for the terminal device.
  • the reference signal of the second system may include the CRS, CRI-RS or demodulation reference signal (Demodulation Reference Signal) adopted by the LTE cell. Reference Signal, DMRS), etc.
  • the terminal device 102 may be interfered by a reference signal from one cell of the second system, or may be simultaneously affected by reference signals from multiple cells of the second system interference. As shown in FIG. 2, the terminal device 102 experiences interference from the second cell C1 in the second system. For another example, in FIG.
  • the terminal device 102 when the terminal device 102 is located in the first cell (that is, the cell corresponding to the network device 101 in the first system), the second cell C1 (the cell corresponding to the network device 103 in the second system), and the second cell When in the overlapping area of C2 (the cell corresponding to the network device 105 in the second system), the terminal device 102 may be simultaneously interfered by the reference signals of the second cell C1 and the second cell C2. Therefore, the parameter configuration of the reference signal of the second system may be specifically used to indicate the parameter configuration of the reference signal of one or more second cells in the second system.
  • the network device 101 can obtain the information of the first system by accessing an operation administration and maintenance (OAM) network element or a higher-level management network element.
  • OAM operation administration and maintenance
  • the parameter configuration of the reference signal of the other communication system that is, the second system.
  • the first system and the second system may also be two access network subsystems in a communication system using the same radio access technology.
  • the first system includes the network equipment of cell A in the 5G NR system and the terminal equipment that accesses the cell A
  • the second system includes the network equipment of the cell B in the 5G NR system and the network equipment connected to the cell B in the 5G NR system. terminal equipment.
  • the terminal device can determine the parameter configuration of the reference signal of the second system through the first information , such as the reference signal of cell A in the 5G NR system, so the terminal device can suppress the interference of the reference signal of the second system to the received signal of the first system according to this parameter configuration.
  • the terminal device can suppress the 5G NR system according to this parameter configuration The interference of the reference signal of cell A in the 5G NR system to the received signal of cell B in the 5G NR system.
  • the first system and the second system adopt different wireless access technologies as an example to introduce this embodiment in detail. It should be noted that, in some embodiments, as described above, the first system and the second system may also be two subsystems in a communication system using the same radio access technology, which may not be limited in this application.
  • the reference signal of the second system may be the CRS of the second cell in the second system.
  • the above-mentioned parameter configuration may specifically include one or more of the following parameters: the primary cell ID (PCI) of the second cell in the second system, the offset value of the subframe number corresponding to the CRS of the second cell , the number of antenna ports of the second cell, the system bandwidth of the second cell, and the type of cyclic prefix (cyclic prefix) of the second cell.
  • PCI primary cell ID
  • the offset value of the subframe number corresponding to the CRS of the second cell the number of antenna ports of the second cell
  • the system bandwidth of the second cell the type of cyclic prefix (cyclic prefix) of the second cell.
  • the terminal device 102 can use the parameters included in the above parameter configuration to determine the time-frequency position of the CRS of the second cell and the content of the CRS sequence, so that the CRS of the second cell can be reduced or eliminated by reconstructing the CRS of the second cell or the like.
  • the CRS of the second cell interferes with the received signal of the first system.
  • the subframe number offset value may specifically include the slot number of the CRS in the subframe, the symbol (symbol) number in the slot, and the like.
  • the system bandwidth can include 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz, one of six values, corresponding to the maximum number of physical RBs (Physical RB, PRB) respectively 6/15/25/50/75/100 .
  • the above parameter configuration may further include: the position of the center subcarrier.
  • the first information may include the number of target subcarriers.
  • the terminal device 102 uses the offset function to increase the number of target subcarriers on the basis of the current starting position of the subcarriers to determine the position of the center subcarrier in the second system.
  • the above parameter configuration may further include: the time-frequency position of the multicast/multicast single frequency network MBSFN subframe of the second cell.
  • the reference signal of the second system may be the DMRS of the second cell in the second system.
  • the above-mentioned parameter configuration may specifically include one or more of the following parameters: the scrambling ID (scrambling ID) of the DMRS of the second cell, the slot position of the DMRS in a frame, the time-domain symbol position in the slot, the second cell
  • the code division multiplexing (code division multiplexing, CDM) grouping type the physical cell Cell ID of the second cell, the DMRS sequence initialization value ⁇ 0/1 ⁇ ; the PRB frequency domain starting position of the second cell scheduling, the first The number of PRBs scheduled by the second cell.
  • the terminal device 102 receives the first information from the network device 101 .
  • the terminal device 102 can use the parameter configuration of the reference signal indicated by the first information to reduce the interference of the reference signal to the received signal of the first system.
  • the method may also include:
  • the terminal device 102 reduces the interference of the reference signal to the received signal of the first system according to the parameter configuration of the reference signal of the second system indicated by the first information.
  • the terminal device 102 can obtain the reference signal of the second system by reconstructing the reference signal of the second system according to the parameter configuration indicated by the first information. Interference control is then performed for the reference signal of the second system.
  • the interference of the reference signal from the second system can be reduced from the received signal by means of interference reduction or the like, so as to achieve the effect of suppressing the interference to obtain the received signal from the first system.
  • the following describes the detailed process of interference suppression by the terminal device 102 by taking the signal that causes interference to the terminal device 102 as the CRS of the second cell in the second system as an example:
  • Step 1 According to the parameter configuration indicated by the first information (including the PCI of the second cell, the offset value of the subframe number corresponding to the CRS of the second cell, the system bandwidth and the type of the cyclic prefix), the terminal device 102 can determine Content of the CRS sequence carried by the CRS of the second cell.
  • the CRS sequence carried in the CRS is composed of a series of reference symbols, where each reference symbol occupies a resource element (Resource Element, RE), and the generation method of the sequence is shown in formula 1:
  • n s represents the slot number in the frame where the CRS reference symbol is located
  • l represents the symbol number in the slot
  • N represents the subframe symbols s l CRS in value of the reference symbol.
  • c is a pseudo-random sequence, which is defined by a set of Gold sequences with a length of 31. where the output length of sequence c is denoted as M PN .
  • M PN the output length of sequence c.
  • x 1 (n+31) (x 1 (n+3)+x 1 (n))mo d2
  • x 2 (n+31) (x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n))mod 2
  • N c 1600
  • the initial value of the sequence x 1 is:
  • the initial value of the sequence x 2 is expressed as: in, Indicates the primary cell number of the current cell, which ranges from 0 to 503.
  • the offset value of the subframe number corresponding to the CRS of the second cell, the system bandwidth, and the type of the cyclic prefix, the value of each reference symbol in the CRS sequence carried in the CRS of the second cell can be obtained. content.
  • Step 2 According to parameters such as the number of antenna ports of the second cell, the PCI, the position of the center subcarrier, and the time-frequency position of the MBSFN subframe, the time-frequency position of the CRS can also be determined.
  • FIG. 5 it is a schematic structural diagram of a subframe after a CRS is mapped to REs on the subframe.
  • the CRS of antenna port 0 and antenna port 1 occupy 4 REs in each slot (in this example, a slot contains 7 time domain symbols), and occupy 8 REs in a slot pair; and when supporting three REs
  • the number of REs occupied by CRSs of antenna port 2 and antenna port 3 is reduced, that is, the CRSs of antenna port 2 and antenna port 3 occupy 2 REs in each slot.
  • Step 3 After determining the content carried by the CRS of the second cell and the time-frequency location, the terminal device 102 can reconstruct the CRS of the second cell. Then, the interference cancellation method is used to suppress the CRS of the second cell when the signal from the first system is received, so as to achieve the effect of suppressing the interference of the signal from the first system.
  • the following describes the detailed process of interference suppression by the terminal device 102 by taking the signal that causes interference to the terminal device 102 as the DMRS of the second cell in the second system as an example:
  • Step 1 The terminal device 102 can determine the content of the DMRS sequence carried by the DMRS of the second cell according to the parameter configuration indicated by the first information.
  • the DMRS sequence carried in the DMRS is composed of a series of reference symbols, where each reference symbol occupies one RE, and the generation method of the sequence is shown in formula 2:
  • r(n) represents the value of the DMRS reference symbol in the nth PRB.
  • r(n) in formula 2 is a pseudo-random sequence, and the initialization of sequence r(n) is completed by the following formula 3:
  • l is the number of symbols in the slot (determined by the position of the time-domain symbols in the slot), is the number of slots in a frame (determined by the slot position of the DMRS in a frame).
  • PDSCH is scheduled by DCI format 1_0 and scrambled by C-RNTI, MCS-C-RNTI or CS-RNTI, then The value of is determined by the high-level parameter scramblingID0;
  • the physical cell ID configured as the serving cell Without configuring high-level parameters, the physical cell ID configured as the serving cell;
  • ⁇ can be determined by the CDM packet type; The value range of is (0, 1). If the PDSCH is scheduled by DCI format 1_1, the value is given by the field DMRS sequence initialization in the DCI. In other cases, the value is directly 0.
  • Step 2 Determine the time-frequency position of the DMRS.
  • Step 3 After determining the content carried by the DMRS of the second cell and the time-frequency position, the terminal device 102 can reconstruct the DMRS of the second cell. Then, the DMRS of the second cell is suppressed when the signal from the first system is received by means of interference reduction, so as to realize the effect of interference reduction for the signal from the first system.
  • the terminal device 102 may also detect the channel quality of the downlink transmission in the network environment in which it is located. After the channel quality is poor, the terminal device 102 sends information (hereinafter referred to as second information) to the network device 101 to instruct the network device 101 to send the above-mentioned first information. After receiving the second information, the network device 101 may send the above-mentioned first information to the terminal device 102 . In the case where the second information is not received, the network device 101 does not need to send the first information to the terminal device 102, so as to reduce the occupation of air interface resources.
  • second information information
  • the network device 101 does not need to send the first information to the terminal device 102, so as to reduce the occupation of air interface resources.
  • the method may further include:
  • the terminal device 102 acquires the downlink channel quality of the terminal device 102 .
  • the downlink channel quality may be the channel quality at which the terminal device receives various types of downlink signals sent by the network side device (including but not limited to the network device 101 ).
  • step S204 may specifically include: the terminal device 102 obtains the received signal-to-noise ratio (signal-to-noise ratio, SNR), signal-to-interference plus noise ratio (signal-to-interference plus noise ratio, SINR), or Parameters such as Reference Signal Receiving Power (RSRP).
  • the terminal device 102 may perform measurement based on terminal device-specific (UE-specific) CSI-RS to obtain RSRP or SINR.
  • the terminal device 102 sends the second information to the network device 101.
  • the second information is used to indicate that the terminal device 102 needs the network device to send the first information.
  • the second information is used to request the network device 101 to send the first information to the terminal device 102 .
  • the terminal device 102 may not send the second information to the network device 101 .
  • the network device 101 also does not need to send the first information to the terminal device 102 .
  • the terminal device 102 When the current RSRP, SNR, or SINR obtained by the terminal device 102 is low, it means that the terminal device 102 may be interfered by a relatively strong reference signal in the second system. Furthermore, the terminal device 102 sends the second information to the network device 101, so that the network device 101 sends the first information to the terminal device 102 after receiving the second information, and further performs interference suppression according to the content of S203.
  • the network device 101 may determine whether to send the first information to the terminal device 102 according to its own resource occupation. That is to say, the role of the second information can be understood as the terminal device notifying the network device 101 that the terminal device 102 needs to suppress interference, and the network device 101 does not necessarily trigger sending to the terminal device 102 after receiving the second information.
  • Action of the first message. Whether to trigger the action of sending the first information to the terminal device 102 may be determined by the network device 101 according to information such as its own resource occupation.
  • the second information may include parameters for characterizing the channel quality of the terminal device 102 .
  • the second information may include one or more of RSRP, SNR or SINR of the terminal device 102 .
  • the network device 101 determines the relationship between the RSRP, SNR or SINR of the terminal device 102 and the preset threshold value, and the RSRP, SNR or SINR of the terminal device 102 is smaller than the preset threshold value After that, it is determined that the terminal device 102 needs the network device 101 to send the first information, so that the network device 101 can be triggered to send the first information to the terminal device 102 .
  • the second information may be a preset identification.
  • the preset identifier is used to indicate that the current channel quality of the terminal device 102 is lower than the preset threshold value.
  • the above-mentioned preset identifier may be carried on the PUCCH or PUSCH, and occupy 1 bit.
  • the terminal device 102 sends "0" to the network device 101 through the above-mentioned PUCCH or PUSCH, thereby making the network device 101 in the After receiving the above "0", it is determined that the terminal device 102 needs the network device 101 to send the first information, and then the network device 101 is triggered to send the first information to the terminal device 102 .
  • the terminal device 102 when the channel quality is lower than the preset threshold, the terminal device 102 sends the second information to the network device 101 to trigger the network device 101 to send the first information to the terminal device 102 .
  • the content specifically included in the second information may not be limited in this application.
  • the performance is poor (for example, the computing power is weaker).
  • terminal equipment with longer processing delay can support a smaller number of cells for interference suppression; terminal equipment with strong performance (such as stronger computing power and shorter processing delay) can support a larger number of cells for interference suppression.
  • the network device 101 can be made to comply with the interference suppression supported by the terminal device 102.
  • the method may further include:
  • the terminal device 102 sends the third information to the network device 101 .
  • the third information is used to indicate the number of interference signals processed by the terminal device 102 .
  • the interference signal is a reference signal of the second system.
  • the number of interference signals processed by the terminal device 102 may refer to the maximum number of interference signals that the terminal device 102 can process.
  • the terminal device may determine, according to its own processing capability, that the terminal device can reduce the interference of the reference signals from N second systems at a maximum, that is, the maximum number of interference signals that the terminal device can process is N; The device sends third information indicating the number N.
  • the network device can determine that the terminal device can process a maximum of N interference signals, so as to send the parameter configuration of the reference signals of the second system to the terminal device whose number matches the processing capability of the terminal device.
  • the third information may be the maximum number of interference signals that the terminal device 102 can handle.
  • the third information is "001".
  • the third information is "010", and so on.
  • the number of bits occupied by the third information may be determined according to actual needs.
  • the current mobile communication network mostly adopts the cellular network structure, so a terminal device may be interfered by the reference signals of 6 neighboring cells. Because 6 adjacent cells may correspond to 6 reference signals, as in the above example, a 3-bit field may be used to carry the third information. In other cases, more or less bits may also be used to carry the third information, which may not be limited in this application.
  • the third information may include performance parameters of the terminal device 102 (eg, parameters related to the computing capability of the terminal device 102, etc.).
  • the network device 101 can determine the maximum number of interference signals that the terminal device 102 can handle according to the performance parameter.
  • the third information is specifically used to indicate the number of interference signals that the terminal device needs to process.
  • the terminal device may determine the number M of reference signals of the second system that interfere with the terminal device according to information such as the channel quality of the current downlink channel, that is, determine the number M of interference signals that the terminal device needs to process.
  • the terminal device then sends third information indicating the number M to the network device.
  • the network device can determine that the terminal device needs to process the M interference signals, so as to send to the terminal device the parameter configuration of the reference signals of the second system whose number matches the number required by the terminal device.
  • the network device can determine the number of reference signals of the second system indicated in the first information according to the number of interference signals indicated by the third information. For example, when the third information is used to indicate that the maximum number of interference signals that can be processed by the terminal device is N, the network device may, according to the number N of interference signals indicated by the third information, send messages to the terminal device for indicating N second interference signals.
  • the first information of the parameter configuration of the reference signal of the system It should be noted that, after the network device determines the number N of interference signals indicated by the third information, the first information sent to the terminal device does not necessarily indicate the parameter configuration of the N reference signals of the second system.
  • the first information It can also be used to indicate the parameter configuration of reference signals of other numbers of the second system.
  • the network device may send the first information indicating the parameter configuration of the reference signals of the second system more than N to the terminal device, so that the terminal device can select an appropriate N from the reference signals of the second system more than N and the parameter configuration of the N reference signals is determined according to the first information, so as to reduce the interference of the N reference signals to the received signal of the first system.
  • the network device may send the first information indicating the parameter configuration of less than N reference signals of the second system to the terminal device. This application may not limit the number of reference signals of the second system indicated in the first information sent by the network device to the terminal device after the network device receives the above-mentioned third information.
  • the terminal device 102 may send the first information to the network device 101 through the terminal device 102.
  • This way of transmitting the identity of the second cell in the second system enables the network device 101 to determine which cells in the second system the reference signals that interfere with the terminal device 102 belong to. Then, the network device 101 can notify the terminal device 102 of the parameter configuration of the reference signal of the second cell by sending the first information.
  • the terminal device 102 performs preliminary analysis on the signal from the second system, and can obtain the identity of the cell sending the signal (at this time, it is not necessary for the terminal device 102 to obtain the reference of the corresponding cell by analyzing the signal from the second system) Detailed parameters of the signal, such as time-frequency location, carrying content, etc. Only the terminal device 102 needs to be able to determine the identity of the cell). Then, the terminal device 102 transmits information (hereinafter referred to as "fourth information") indicating the identity of the cell to the network device 101 . Then, the network device 101 can determine, according to the fourth information, which cells have reference signals that interfere with the terminal device, and further indicate the parameter configuration of the reference signals of these cells in the first information.
  • the method may further include:
  • the terminal device 102 sends the fourth information to the network device 101 .
  • the fourth information is used to indicate the identity of one or more second cells in the second system where the reference signal interferes with the terminal device 102 .
  • the network device 101 may send the first information to the terminal device 102 by carrying the above-mentioned first information in RRC signaling.
  • the above S201 may specifically include:
  • the network device 101 sends the first RRC signaling to the terminal device 102.
  • the first RRC signaling includes the first information.
  • the above S202 may specifically include:
  • the terminal device 102 receives the first RRC signaling from the network device 101.
  • the network device 101 may periodically send the first information to the terminal device 102 every 10 ms, where the first information is used to indicate the parameter configuration of the CRS. In this way, the terminal device 102 can determine the parameter configuration of the CRS according to the first information, so as to perform interference suppression.
  • the network device 101 may only send the first information to the terminal device during the cycle during which the CRS changes, instead of necessarily sending it once every CRS change cycle (10ms). first information.
  • the terminal device 102 does not receive the first information within a period, it can determine that the parameter configuration of the CRS has not changed in transmission, and then can continue to use the parameter configuration of the CRS indicated in the first information sent last time to perform interference. inhibition.
  • the semi-persistent scheduling technology can be used to control the terminal device 102 to activate the first DCI by means of DCI activation.
  • the timing of parameter configuration in a message may further include:
  • the network device 101 sends the first DCI to the terminal device.
  • the first DCI is used to instruct to activate the parameter configuration indicated by the first information.
  • the 1-bit indication information in the DCI may be used to indicate whether the terminal device 102 adopts the parameter configuration in the first information.
  • the above parameter configuration can also be deactivated by means of DCI deactivation.
  • a fourth DCI may be sent to the terminal device 102 through the network device 101, where the fourth DCI is used to instruct to deactivate the parameter configuration indicated by the first information, so as to make the terminal device 102 stop using the parameter configuration in the first information, No more interference suppression and energy savings.
  • this application can also be sent by carrying the first information in the DCI.
  • the above S201 may specifically include:
  • the network device 101 sends the second DCI to the terminal device 102.
  • the second DCI includes the first information.
  • the above S202 may specifically include:
  • the terminal device 102 receives the second DCI from the network device 101.
  • the second DCI may include multiple fields, wherein each field is used to indicate a parameter of the CRS of the second cell that interferes with the terminal device 102, for example: the number of one or more second cells, One of the PCI of each second cell, the offset value of the subframe number, the system bandwidth, the position of the center subcarrier, the type of the cyclic prefix, and the time-frequency position of the MBSFN subframe in the second system.
  • the second DCI may include the first field and the second field.
  • the first field is used to indicate the number of one or more second cells
  • the second field is used to indicate the number of antenna ports of each second cell.
  • table 1 shows two values of the first field:
  • the first field in the value mode 1 starts from “0", and the first field in the value mode 2 starts from "1".
  • the parameter configuration indicated by the first information includes the parameter configurations of the CRSs of two second cells
  • the value of the first field in the DCI is determined to be 001 according to the value method 1; the DCI is determined according to the value method 2
  • the value of the first field in is 010.
  • Table 2 shows two values of a second field:
  • the second field in the value mode 1 starts from “0", and the second field in the value mode 2 starts from "1".
  • the value of the second field corresponding to the second cell in the DCI is determined according to the value method 1, and the value of the second field corresponding to the second cell in the DCI is 001.
  • the value mode 2 determines that the value of the second field corresponding to the second cell in the DCI is 010.
  • the field used to carry the first information in the second DCI may be a newly added field by increasing the payload size of the DCI on the basis of the existing DCI.
  • the value of the redundancy state of an existing field in the DCI may also be used to carry the first information.
  • the present application may not limit the manner in which the second DCI carries the first information.
  • the parameter configuration indicated by the first information may also be divided into two parts in this embodiment of the present application. Among them, a part is indicated to the terminal equipment through RRC signaling, and the other part is indicated to the terminal equipment through DCI. Further, S201 in the above embodiment of the present application may specifically include:
  • the network device 101 sends the second RRC signaling and the third DCI to the terminal device 102.
  • the second RRC signaling includes information used to indicate the configuration of the first parameter.
  • the third DCI includes information indicating the second parameter configuration.
  • the first parameter configuration may be information that occupies a large overhead in the parameter configuration indicated by the first information; the second parameter configuration may be information that occupies a small overhead in the parameter configuration indicated by the first information.
  • the PCI of a cell ranges from 0 to 503, at least 9 bits are required to represent the PCI of a cell. Therefore, PCI can be used as one of the first parameter configurations.
  • the system bandwidth of a cell is divided into six values of 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, and 20MHz, that is to say, only 3 bits are needed to represent the system bandwidth of a cell. Therefore, the system bandwidth can be used as an item in the second parameter configuration.
  • the first parameter configuration may be information with a relatively slow change frequency in the parameter configuration indicated by the first information; the second parameter configuration may be information with a relatively fast change frequency in the parameter configuration indicated by the first information.
  • the PCI of the cell changes more slowly than the system bandwidth of the cell. Therefore, the PCI can be used as an item in the first parameter configuration, and the system bandwidth can be used as an item in the second parameter configuration.
  • the first parameter configuration and the second parameter configuration may also be determined according to the occupation overhead and change frequency of each information in the parameter configuration indicated by the first information. For example, the occupancy overhead and change frequency of each item of information in the parameter configuration indicated by the first information may be weighted and summed, and then, according to the result of the weighted summation, each item of information in the parameter configuration indicated by the first information may be divided into The first parameter configuration and the second parameter configuration.
  • the division manner of the first parameter configuration and the second parameter configuration may not be limited.
  • the network device in the first system sends the first information for indicating the parameter configuration of the reference signal of the second system to the terminal device, so that the terminal device can determine the second system. Parameter configuration of the reference signal of the system.
  • the terminal device can suppress the generation of the reference signal of the second system when receiving the signal from the first system by reconstructing the reference signal of the second system according to the parameter configuration of the reference signal of the second system. interference.
  • the above-mentioned terminal device or network device includes corresponding hardware structures and/or software modules for executing each function.
  • the unit of each example described in conjunction with the embodiments disclosed herein can be implemented in hardware or in the form of a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.
  • the device may be divided into functional modules according to the foregoing method examples.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one in the processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.
  • the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and another division manner may be used in actual implementation.
  • FIG. 10 it is a schematic diagram of the composition of a communication apparatus 30 according to an embodiment of the present application.
  • the communication apparatus 30 may be a chip or a system-on-chip in the terminal device.
  • the communication apparatus 30 may be used to perform the functions of the terminal device 102 involved in the above embodiments.
  • the communication device 30 includes: a receiving unit 301 . in:
  • the receiving unit 301 is configured to perform S201 as shown in FIG. 3 .
  • the receiving unit 301 may receive the first information from the first system.
  • the first information is used to indicate the parameter configuration of the reference signal of the second system.
  • the first system adopts a first radio access technology
  • the second system adopts a second radio access technology, and the first radio access technology is different from the second radio access technology.
  • the communication device 30 further includes: an interference cancellation unit 302 .
  • the interference cancellation unit 302 is configured to reduce the interference of the reference signal to the received signal of the first system according to the parameter configuration of the reference signal of the second system.
  • the communication device 30 further includes: a sending unit 303 .
  • the sending unit 303 is configured to send second information to the network device 101 when the downlink channel quality is lower than a preset threshold; the second information is used to indicate the terminal device to the network device 101 102 requires the network device 101 to send the first information.
  • the sending unit 303 is configured to send third information to the network device 101, where the third information is used to indicate the number of interference signals processed by the terminal device, and the interference signals are all the reference signal of the second system.
  • the receiving unit 301 is specifically configured to receive first RRC signaling from the network device 101 of the first system, where the first RRC signaling includes the first RRC signaling information.
  • the receiving unit 301 is further configured to receive the first DCI from the network device 101, where the first DCI is used to indicate activation of the parameter configuration.
  • the receiving unit 301 is specifically configured to receive a second DCI from the network device 101 of the first system, where the second DCI includes the first information.
  • the parameter configuration includes a first parameter configuration and a second parameter configuration.
  • the receiving unit 301 is specifically configured to receive the second RRC signaling and the third DCI from the network device 101 of the first system, where the second RRC signaling includes instructions for indicating the first parameter configuration information; the third DCI includes information used to indicate the configuration of the second parameter.
  • the parameter configuration includes time-frequency location indication information of the reference signal and indication information of a reference signal generation parameter.
  • the parameter configuration may specifically include one or more of the following parameters: the physical cell identifier PCI of the second cell in the second system, the offset value of the subframe number corresponding to the cell-specific reference signal CRS, the number of antenna ports, the system Bandwidth, central subcarrier location, type of cyclic prefix, and time-frequency location of MBSFN subframes for multicast/multicast single frequency network.
  • the first radio access technology is LTE technology
  • the second radio access technology is 5G NR technology.
  • FIG. 11 it is a schematic diagram of the composition of a communication apparatus 40 according to an embodiment of the present application.
  • the communication apparatus 40 may be a chip or a system-on-chip in a network device.
  • the communication apparatus 40 may be used to perform the functions of the network device 101 involved in the above embodiments.
  • the communication apparatus 40 includes: a sending unit 401 . in:
  • the sending unit 401 is configured to send first information to the terminal device 102; the first information is used to indicate the parameter configuration of the reference signal of the second system; the first system adopts the first wireless access technology, the second The system adopts a second radio access technology, and the first radio access technology is different from the second radio access technology.
  • the communication device 40 further includes: a receiving unit 402 .
  • the receiving unit 402 is configured to receive second information from the terminal device 102; the second information is used to indicate to the network device 101 that the terminal device 102 needs the network device to send the first information.
  • the communication device 40 further includes: a receiving unit 402 .
  • the receiving unit 402 is configured to receive third information from the terminal device 102; the third information is used to indicate the number of interference signals processed by the terminal device 102, and the interference signals are reference signals of the second system.
  • the sending unit 401 is specifically configured to send the first RRC signaling to the terminal device 102; the first RRC signaling includes the first information.
  • the sending unit 401 is further configured to send the first DCI to the terminal device 102; the first DCI is used to instruct to activate the parameter configuration.
  • the sending unit 401 is specifically configured to send the second DCI to the terminal device 102; the second DCI includes the first information.
  • the parameter configuration includes a first parameter configuration and a second parameter configuration
  • the sending unit 401 is specifically configured to send the second RRC signaling and the third DCI to the terminal device 102; the second RRC signaling includes information used to indicate the configuration of the first parameter; the third The DCI includes information indicating the second parameter configuration.
  • the parameter configuration includes time-frequency position indication information of the reference signal and indication information of a reference signal generation parameter.
  • the parameter configuration may specifically include one or more of the following parameters: the physical cell identifier PCI of the second cell in the second system, the offset value of the subframe number corresponding to the cell-specific reference signal CRS, the number of antenna ports, the system Bandwidth, central subcarrier location, type of cyclic prefix, and time-frequency location of MBSFN subframes for multicast/multicast single frequency network.
  • the first radio access technology is LTE technology
  • the second radio access technology is 5G NR technology.
  • FIG. 12 shows a schematic diagram of the composition of a communication device 50 .
  • the communication device 50 includes: one or more processors 501 and one or more memories 502 .
  • One or more processors 501 are coupled to one or more memories 502 for storing computer-executable instructions.
  • the communication apparatus 50 when the processor 501 executes the instructions stored in the memory 502, the communication apparatus 50 is caused to perform S202, S203 as shown in FIG. 3, and other operations that the terminal device 102 needs to perform.
  • the communication apparatus 50 is caused to perform S201 as shown in FIG. 3, and other operations that the network device 101 needs to perform.
  • the communication device 50 may further include a communication bus 503 and at least one communication interface 504 .
  • the processor 501 may be a central processing unit (CPU), a microprocessor unit, an ASIC, or one or more integrated circuits for controlling the execution of the programs of the present disclosure.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • Communication bus 503 may include a path to transfer information between the above-described components.
  • Communication interface 504 using any transceiver-like device, for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. .
  • RAN radio access network
  • WLAN wireless local area networks
  • the memory 502 may be read-only memory (ROM) or other type of static storage device that can store static information and instructions, random access memory (RAM) or other type of static storage device that can store information and instructions It can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, CD-ROM storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or capable of carrying or storing desired program code in the form of instructions or data structures and capable of being executed by a computer Access any other medium without limitation.
  • the memory may exist independently and be connected to the processing unit through a bus. The memory can also be integrated with the processing unit.
  • the memory 502 is used for storing the instructions for executing the solutions of the present disclosure, and the execution is controlled by the processor 501 .
  • the processor 501 is configured to execute the instructions stored in the memory 502, so as to realize the functions in the method of the present disclosure.
  • the processor 501 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 12 .
  • the communication apparatus 50 may include multiple processors, for example, the processor 501 and the processor 507 in FIG. 12 .
  • processors can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.
  • a processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).
  • the communication apparatus 50 may further include an output device 505 and an input device 506 .
  • the output device 505 is in communication with the processor 501 and can display information in a variety of ways.
  • the output device 505 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait.
  • Input device 506 is in communication with processor 501 and can accept user input in a variety of ways.
  • the input device 506 may be a mouse, a keyboard, a touch screen device, a sensor device, or the like.
  • the embodiment of the present application further provides a computer-readable storage medium, where an instruction is stored in the computer-readable storage medium, and when the instruction is executed, the method provided by the embodiment of the present application is executed.
  • Embodiments of the present application also provide a computer program product including instructions. When it runs on a computer, the computer can execute the methods provided by the embodiments of the present application.
  • an embodiment of the present application further provides a chip.
  • the chip includes a processor.
  • the processor executes the computer program instructions
  • the chip can execute the method provided by the embodiments of the present application.
  • the instruction can come from memory inside the chip or from memory outside the chip.
  • the chip also includes an input and output circuit as a communication interface.
  • the functions or actions or operations or steps in the above embodiments may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • a software program When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, all or part of the processes or functions described in the embodiments of the present application are generated.
  • the computer may be a general purpose computer, special purpose computer, computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line, DSL) or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer-readable storage medium can be any available medium that can be accessed by a computer or data storage devices including one or more servers, data centers, etc., that can be integrated with the medium.
  • the usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media (eg, solid state disks (SSDs)), and the like.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention, qui appartient au domaine technique des communications, concerne un procédé et un appareil de communication. La présente demande permet de résoudre le problème selon lequel, lorsqu'un dispositif de terminal reçoit un signal d'un système de communication, il est soumis à des interférences provenant d'un autre système de communication. Le procédé comprend : la réception, par un dispositif de terminal, de premières informations en provenance d'un premier système, les premières informations étant utilisées pour indiquer une configuration de paramètres d'un signal de référence d'un second système ; l'utilisation, par le premier système, d'une première technologie d'accès sans fil et l'utilisation, par le second système, d'une seconde technologie d'accès sans fil, la première technologie d'accès sans fil étant différente de la seconde technologie d'accès sans fil ; et selon la configuration de paramètres du signal de référence du second système et par le dispositif de terminal, le fait d'éliminer, d'un signal reçu, des interférences d'un signal qui vient du second système.
PCT/CN2021/105082 2020-07-15 2021-07-07 Procédé et appareil de communication WO2022012396A1 (fr)

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