A GNSS interference reduction method and apparatus

Abstract

The application provides a GNSS interference reduction method and device, wherein the method is applied to a terminal with an NR transmitter, and the method comprises the following steps: when the frequency band of a 3GPP access service cell of the terminal interferes with GNSS receiving signals, it is judged whether the terminal is simultaneously connected to a non-3GPP access network; if yes, a PDU session on a link between the terminal and the 3GPP access network is transferred to a link between the terminal and the non-3GPP access network; otherwise, a connection with the non-3GPP access network is established, and the PDU session on the link between the terminal and the 3GPP access network is transferred to the link between the terminal and the non-3GPP access network. The method provided by the application avoids the interference of the frequency band of the 3GPP access cell of the terminal on the GNSS receiving signals, and solves the technical problem that the performance of GNSS is reduced due to the interference.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to a method and apparatus for reducing GNSS interference. Background Technology

[0002] For terminals that have both LTE / NR transmitters and GNSS receivers, the LTE / NR transmitter can easily interfere with GNSS reception in certain frequency bands because the acquisition and tracking sensitivity of the GNSS receiver can reach -160dBm.

[0003] The main methods currently used are to reduce the LTE / NR transmit power of the terminal or to use time division multiplexing of GNSS and LTE / NR. These methods often affect the performance of one or both parties. Summary of the Invention

[0004] In view of this, this application provides a GNSS interference reduction method and apparatus to solve the above-mentioned technical problems.

[0005] In a first aspect, embodiments of this application provide a GNSS interference reduction method, applied to a terminal with an NR transmitter, comprising:

[0006] When the frequency band of the terminal's 3GPP access serving cell interferes with the GNSS received signal, determine whether the terminal is simultaneously connected to a non-3GPP access network. If so, transfer the PDU session on the terminal-3GPP access network link to the terminal-non-3GPP access network link; Otherwise, establish a connection with a non-3GPP access network and transfer the PDU session on the terminal-3GPP access network link to the terminal-non-3GPP access network link.

[0007] In one possible implementation, the method further includes: If the harmonics of the frequency band of the terminal's 3GPP access serving cell are within the GNSS operating frequency band, or if the frequency band of the terminal's 3GPP access serving cell is an adjacent frequency band to the GNSS operating frequency band, it is determined that the frequency band of the terminal's 3GPP access serving cell interferes with the GNSS received signal.

[0008] In one possible implementation, before establishing a connection with a non-3GPP access network, the method further includes: initiating a registration request to the non-3GPP access network.

[0009] In one possible implementation, after transferring the PDU session between the terminal and the 3GPP access network link to the link between the terminal and a non-3GPP access network, the method further includes disconnecting the terminal from the serving cell of the 3GPP access network.

[0010] Secondly, embodiments of this application provide a GNSS interference reduction method, applied to a terminal with an LTE transmitter, comprising: When the frequency band of the terminal's 3GPP access serving cell interferes with the GNSS received signal, determine whether the terminal is simultaneously connected to a non-3GPP access network. If so, the PDN connection between the terminal and the 3GPP access network will be transferred to a non-3GPP access network; Otherwise, establish a connection with a non-3GPP access network and transfer the terminal's PDN connection with the 3GPP access network to the non-3GPP access network.

[0011] In one possible implementation, transferring the terminal's PDN connection from the 3GPP access network to a non-3GPP access network includes: Obtain the Access Point Name (APN) of the PDN connection; Initiate PDN connection establishment to the Access Point Name (APN) through a non-3GPP access network.

[0012] Thirdly, embodiments of this application provide a GNSS interference reduction device, applied to a terminal with an NR transmitter, comprising: The judgment unit is used to determine whether the terminal is simultaneously connected to a non-3GPP access network when the frequency band of the 3GPP access serving cell of the terminal interferes with the GNSS received signal; if yes, it enters the first processing unit; otherwise, it enters the second processing unit. The first processing unit is used to transfer the PDU session on the terminal-3GPP access network link to the terminal-non-3GPP access network link. The second processing unit is used to establish a connection with a non-3GPP access network and transfer the PDU session on the terminal-3GPP access network link to the terminal-non-3GPP access network link.

[0013] Fourthly, embodiments of this application provide a GNSS interference reduction device, applied to a terminal with an LTE transmitter, comprising: The judgment unit is used to determine whether the terminal is simultaneously connected to a non-3GPP access network when the frequency band of the 3GPP access serving cell of the terminal interferes with the GNSS received signal; if yes, it enters the first processing unit; otherwise, it enters the second processing unit. The first processing unit is used to transfer the PDN connection between the terminal and the 3GPP access network to a non-3GPP access network. The second processing unit is used to establish a connection with a non-3GPP access network and transfer the PDN connection between the terminal and the 3GPP access network to the non-3GPP access network.

[0014] Fifthly, embodiments of this application provide an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method of embodiments of this application.

[0015] Sixthly, embodiments of this application provide a computer-readable storage medium storing computer instructions that, when executed by a processor, implement the methods of embodiments of this application.

[0016] In a seventh aspect, embodiments of this application provide a computer program product, including a computer program / instructions, which, when executed by a processor, implement the method of embodiments of this application.

[0017] The method of this application avoids interference from the frequency band of the terminal's 3GPP access cell to the GNSS received signal, and solves the technical problem of GNSS performance degradation due to interference. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 The terminal provided in this application supports NR 3GPP access and non-3GPP access network architectures. Figure 2 The terminal provided in this application supports LTE 3GPP access and non-3GPP access network architectures. Figure 3 A flowchart of a GNSS interference reduction method with an NR transmitter terminal provided in an embodiment of this application; Figure 4 A flowchart illustrating the handover from a 3GPP access network to a non-3GPP access network for NR as provided in this application embodiment; Figure 5 A flowchart of the 3GPP access network handover and deregistration process for NR provided in this application embodiment; Figure 6 A flowchart of a GNSS interference reduction method with an LTE transmitter terminal provided in an embodiment of this application; Figure 7 A flowchart illustrating the handover from a 3GPP access network to a non-3GPP access network for LTE, provided in an embodiment of this application. Figure 8This is a frequency distribution diagram provided in an embodiment of this application after switching to Wi-Fi access; Figure 9 Functional structure diagram of a GNSS interference reduction device with an NR transmitter terminal provided in the embodiments of this application; Figure 10 Functional structure diagram of a GNSS interference reduction device with an NR transmitter terminal provided in the embodiments of this application; Figure 11 This is a structural diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] First, a brief introduction to the design concept of the embodiments of this application will be given.

[0023] Interference caused by coexistence within equipment arises from the proximity of transceivers of different radio technologies on the same platform. Therefore, when these different transceivers operate simultaneously on certain frequency bands (same or adjacent bands, harmonics, etc.), the transmitter of one technology acts as an aggressor / interferer, affecting the receiver of another technology, which then becomes the victim.

[0024] Currently, the main methods employed are for terminals to reduce LTE / NR transmit power or to use time-division multiplexing for GNSS and LTE / NR. These methods often affect the performance of one or both. Another method involves the terminal learning that the access network is configured with IDC processing capabilities (which are optional for the access network), and reporting the coexistence interference within the device to the access network for subsequent processing (FDM, TDM, etc.). When the terminal detects GNSS interference, if it is in an NR network, it can inform the 3GPP access network via (3GPP TS 38.331) UEAssistanceInformation, and set VictimSystemType to one or more of GNSS (GPS, GLONASS, BeiDou, Galileo, NAVIC, etc.). If it is in an LTE network, it can inform the 3GPP access network via (3GPP TS 36.331) InDeviceCoexIndication, and set VictimSystemType to one or more of GNSS. This type of method also has limitations. The interference information reported by the terminal is only a description and suggestion, and the decision is entirely up to the network. It is very likely that the strategy adopted by the access network is not an ideal solution.

[0025] When an LTE (Long Term Evolution, commonly known as 4G) / NR (New Radio, commonly known as 5G) transmitter is running, it will affect GNSS, Bluetooth, and WLAN receivers. Similarly, Bluetooth and WLAN transmitters will also affect LTE / NR receivers because the transceivers are close together and operate in the same or adjacent frequency ranges.

[0026] For a terminal that supports LTE / NR, most can support non-3GPP access (mainly Wi-Fi) while also supporting 3GPP (3rd Generation Partnership Project) access. A typical application that supports non-3GPP access is VoWIFI.

[0027] Currently, the most common types of LTE / NR interference to GNSS are harmonic interference and sideband interference, in the following frequency bands: LTE Band 13 (second harmonic): 1554 to 1574 MHz; NR Band 13 (second harmonic): 1554 to 1574 MHz; LTE Band 14 (second harmonic): 1576 to 1596 MHz; NR Band 14 (second harmonic): 1576 to 1596 MHz; LTE Band 39: 1880 to 1920 MHz; NR Band 39: 1880 to 1920 MHz.

[0028] The frequency band of GNSS L1 is 1559 to 1610 MHz. Therefore, the second harmonics of LTE / NR bands 13 and 14 basically overlap with the frequency range of GNSS L1, and the sideband of LTE / NR band 39 will also interfere with GNSS L1.

[0029] Terminals support NR 3GPP access and non-3GPP access network architectures such as Figure 1 As shown; the network architecture for LTE-supported 3GPP access and non-3GPP access is as follows. Figure 2 As shown.

[0030] Therefore, this application provides a method to avoid interference from 3GPP access networks on GNSS reception. The technical approach of this method is: when the GNSS reception in the terminal is interfered with by the 3GPP band, the 3GPP access network connected to the terminal is switched to a non-3GPP access network.

[0031] After introducing the application scenarios and design concepts of the embodiments of this application, the technical solutions provided by the embodiments of this application will be described below.

[0032] like Figure 3 As shown, this application provides a GNSS interference reduction method applied to a terminal with an NR transmitter, including: Step 101: When the frequency band of the terminal's 3GPP access serving cell interferes with the GNSS received signal, determine whether the terminal is simultaneously connected to a non-3GPP access network; if yes, proceed to step 102; otherwise, proceed to step 103. Step 102: Transfer the terminal's PDU (Protocol Data Unit) session with the 3GPP access network to a non-3GPP access network; Step 103: Establish a connection with the non-3GPP access network and transfer the PDU session between the terminal and the 3GPP access network to the non-3GPP access network.

[0033] The method in this embodiment avoids interference from the frequency band of the terminal's 3GPP access cell to the GNSS received signal, thus solving the technical problem of GNSS performance degradation due to interference.

[0034] In some embodiments, the method further includes: If the harmonics of the frequency band of the terminal's 3GPP access serving cell are within the GNSS operating frequency band, or if the frequency band of the terminal's 3GPP access serving cell is an adjacent frequency band to the GNSS operating frequency band, it is determined that the frequency band of the terminal's 3GPP access serving cell interferes with the GNSS received signal.

[0035] In some embodiments, before establishing a connection with a non-3GPP access network, the method further includes: initiating a registration request to the non-3GPP access network.

[0036] The process of transferring a terminal's PDU session with the NR 3GPP access network to a non-3GPP access network is as follows: Figure 4 As shown.

[0037] In some embodiments, after transferring the PDU session on the terminal-3GPP access network link to the terminal-non-3GPP access network link, the method further includes: disconnecting the terminal from the serving cell of the 3GPP access network.

[0038] Specifically, the process for a terminal to initiate the cancellation of NR 3GPP access is as follows: Figure 5 As shown.

[0039] like Figure 6 As shown, this application provides a GNSS interference reduction method applied to a terminal with an LTE transmitter, including: Step 201: When the frequency band of the terminal's 3GPP access serving cell interferes with the GNSS received signal, determine whether the terminal is simultaneously connected to a non-3GPP access network; if yes, proceed to step 202; otherwise, proceed to step 203. Step 202: Transfer the terminal's connection to the 3GPP access network's PDN (Packet Data Network) to a non-3GPP access network; Step 203: Establish a connection with the non-3GPP access network and transfer the terminal's PDN connection with the 3GPP access network to the non-3GPP access network.

[0040] In some embodiments, the method further includes: If the harmonics of the frequency band of the terminal's 3GPP access serving cell are within the GNSS operating frequency band, or if the frequency band of the terminal's 3GPP access serving cell is an adjacent frequency band to the GNSS operating frequency band, it is determined that the frequency band of the terminal's 3GPP access serving cell interferes with the GNSS received signal.

[0041] In some embodiments, before establishing a connection with a non-3GPP access network, the method further includes: initiating a registration request to the non-3GPP access network.

[0042] In some embodiments, transferring the terminal's PDN connection to the 3GPP access network to a non-3GPP access network includes: Obtain the Access Point Name (APN) of the PDN connection; Initiate PDN connection establishment to the Access Point Name (APN) through a non-3GPP access network.

[0043] Specifically, such as Figure 7 As shown: 1: Wireless transport; 2: The UE discovers an untrusted non-3GPP access and initiates a handover from the 3GPP access to the non-3GPP access. 3: Access authentication; 4: Channel establishment; 5: Proxy BU (MN-NAI, IP Addr req); 6: PCEF-initiated IP-CAN session modification process; 7: Proxy BA (IP Addr); 8: IPsec tunnel established; 9: Establish an IPsec tunnel; 10: The UE (User Terminal) initiates a connection to a new PDN. 11: The deactivation or release process carried by EPS (Evolved Packet System) is a key process for disconnecting and reclaiming resources in the EPS network.

[0044] After the handover is completed, the UE initiates the corresponding separation and deregistration request on the 3GPP access network.

[0045] In some embodiments, the method of transferring the terminal's PDN connection with the 3GPP access network to a non-3GPP access network further includes: disconnecting the terminal's connection with the 3GPP access network.

[0046] In some embodiments, the non-3GPP access network includes a trusted non-3GPP access network and an untrusted non-3GPP access network.

[0047] Taking a non-3GPP access network like Wi-Fi as an example, after the above handover is completed, assuming that the three most commonly used Wi-Fi bands are used, the frequency distribution is as follows: Figure 8 As shown in the figure, the frequencies of Wi-Fi and GNSS are far enough apart that Wi-Fi transmission will not affect GNSS reception.

[0048] Based on the same inventive concept, this application provides a GNSS interference reduction device applied to a terminal with an NR transmitter. (See attached document.) Figure 9 As shown, the GNSS interference reduction device 300 provided in this application embodiment includes at least: The judgment unit 301 is used to determine whether the terminal is simultaneously connected to a non-3GPP access network when the frequency band of the 3GPP access serving cell of the terminal interferes with the GNSS received signal; if yes, it enters the first processing unit; otherwise, it enters the second processing unit. The first processing unit 302 is used to transfer the PDU session on the terminal-3GPP access network link to the terminal-non-3GPP access network link. The second processing unit 303 is used to establish a connection with a non-3GPP access network and transfer the PDU session on the terminal-3GPP access network link to the terminal-non-3GPP access network link.

[0049] It should be noted that the principle of the GNSS interference reduction device 300 provided in this application embodiment to solve the technical problem is similar to the method provided in this application embodiment. Therefore, the implementation of the GNSS interference reduction device 300 provided in this application embodiment can refer to the implementation of the method provided in this application embodiment, and the repeated parts will not be described again.

[0050] Based on the same inventive concept, this application provides a GNSS interference reduction device applied to a terminal with an LTE transmitter. (See attached document.) Figure 10 As shown, the GNSS interference reduction device 400 provided in this application embodiment includes at least: The judgment unit 401 is used to determine whether the terminal is simultaneously connected to a non-3GPP access network when the frequency band of the 3GPP access serving cell of the terminal interferes with the GNSS received signal; if yes, it enters the first processing unit; otherwise, it enters the second processing unit. The first processing unit 402 is used to transfer the PDN connection between the terminal and the 3GPP access network to a non-3GPP access network. The second processing unit 403 is used to establish a connection with a non-3GPP access network and transfer the PDN connection between the terminal and the 3GPP access network to the non-3GPP access network.

[0051] It should be noted that the principle of the GNSS interference reduction device 400 provided in this application embodiment to solve the technical problem is similar to the method provided in this application embodiment. Therefore, the implementation of the GNSS interference reduction device 400 provided in this application embodiment can refer to the implementation of the method provided in this application embodiment, and the repeated parts will not be described again.

[0052] Based on the same inventive concept, embodiments of this application also provide an electronic device, such as... Figure 11 As shown, it includes a memory and a processor. The memory stores an executable program, and the processor executes the executable program to implement the steps of the GNSS interference reduction method provided in the above embodiments.

[0053] The aforementioned processor can be a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The aforementioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof. The general-purpose processor can be a microprocessor or any conventional processor, etc.

[0054] Since the electronic device described in this application embodiment is an electronic device equipped with a memory for implementing the GNSS interference reduction method disclosed in this application embodiment, those skilled in the art can understand the structure and variations of the electronic device described in this application embodiment based on the data flow behavior identification method based on multi-source logs described in this application embodiment, and therefore will not be described again here.

[0055] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the GNSS interference reduction method provided in the above embodiments.

[0056] The storage medium in this embodiment may be included in an electronic device; or it may exist independently and not be assembled into an electronic device. The storage medium carries one or more computer programs, which, when executed, implement the steps of the GNSS interference reduction method provided in the above embodiment.

[0057] It should be understood that the various solutions in this embodiment have the same technical effects as those in the above method embodiments, and will not be repeated here.

[0058] According to embodiments of this application, the computer-readable storage medium can be a non-volatile computer-readable storage medium, such as including but not limited to: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. Optionally, specific examples in this embodiment can refer to the examples described in any embodiment of this application, which will not be repeated here. Obviously, those skilled in the art should understand that the various modules or steps of this application described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Optionally, they can be implemented using computer-executable program code, thereby storing them in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those presented here, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, this application is not limited to any particular hardware and software combination.

[0059] This application also provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the steps of the GNSS interference reduction method provided in the above embodiments.

[0060] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions targeted in the blocks may occur in a different order than those targeted in the drawings. For example, two consecutively represented blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0061] Furthermore, while the operations are described in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in a sequential order. Multitasking and parallel processing may be advantageous in certain environments. Similarly, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of this application. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

Claims

1. A GNSS interference reduction method, applied to a terminal with an NR transmitter, characterized in that, include: When the frequency band of the terminal's 3GPP access serving cell interferes with the GNSS received signal, determine whether the terminal is simultaneously connected to a non-3GPP access network. If so, transfer the PDU session on the terminal-3GPP access network link to the terminal-non-3GPP access network link; Otherwise, establish a connection with a non-3GPP access network and transfer the PDU session on the terminal-3GPP access network link to the terminal-non-3GPP access network link.

2. The method according to claim 1, characterized in that, The method further includes: If the harmonics of the frequency band of the terminal's 3GPP access serving cell are within the GNSS operating frequency band, or if the frequency band of the terminal's 3GPP access serving cell is an adjacent frequency band to the GNSS operating frequency band, it is determined that the frequency band of the terminal's 3GPP access serving cell interferes with the GNSS received signal.

3. The method according to claim 1, characterized in that, Before establishing a connection with a non-3GPP access network, the method further includes: initiating a registration request to the non-3GPP access network.

4. The method according to claim 1, characterized in that, After transferring the PDU session between the terminal and the 3GPP access network link to the link between the terminal and a non-3GPP access network, the method further includes: disconnecting the terminal from the serving cell of the 3GPP access network.

5. A GNSS interference reduction method, applied to a terminal with an LTE transmitter, characterized in that, include: When the frequency band of the terminal's 3GPP access serving cell interferes with the GNSS received signal, determine whether the terminal is simultaneously connected to a non-3GPP access network. If so, the PDN connection between the terminal and the 3GPP access network will be transferred to a non-3GPP access network; Otherwise, establish a connection with a non-3GPP access network and transfer the terminal's PDN connection with the 3GPP access network to the non-3GPP access network.

6. The method according to claim 5, characterized in that, Transferring the terminal's PDN connection from the 3GPP access network to a non-3GPP access network includes: Obtain the Access Point Name (APN) of the PDN connection; Initiate PDN connection establishment to the Access Point Name (APN) through a non-3GPP access network.

7. A GNSS interference reduction device, applied to a terminal with an NR transmitter, characterized in that, include: The judgment unit is used to determine whether the terminal is simultaneously connected to a non-3GPP access network when the frequency band of the 3GPP access serving cell interferes with the GNSS received signal. If yes, proceed to the first processing unit; otherwise, proceed to the second processing unit. The first processing unit is used to transfer the PDU session on the terminal-3GPP access network link to the terminal-non-3GPP access network link. The second processing unit is used to establish a connection with a non-3GPP access network and transfer the PDU session on the terminal-3GPP access network link to the terminal-non-3GPP access network link.

8. A GNSS interference reduction device, applied to a terminal with an LTE transmitter, characterized in that, include: The judgment unit is used to determine whether the terminal is simultaneously connected to a non-3GPP access network when the frequency band of the terminal's 3GPP access serving cell interferes with the GNSS received signal. If yes, proceed to the first processing unit; otherwise, proceed to the second processing unit. The first processing unit is used to transfer the PDN connection between the terminal and the 3GPP access network to a non-3GPP access network. The second processing unit is used to establish a connection with a non-3GPP access network and transfer the PDN connection between the terminal and the 3GPP access network to the non-3GPP access network.

9. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method as claimed in any one of claims 1-4 or any one of claims 5-6.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the method described in any one of claims 1-4 or any one of claims 5-6.

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