CN113497658B - Anti-interference method and device for complex communication scene, storage medium and terminal - Google Patents

Anti-interference method and device for complex communication scene, storage medium and terminal Download PDF

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CN113497658B
CN113497658B CN202010266858.8A CN202010266858A CN113497658B CN 113497658 B CN113497658 B CN 113497658B CN 202010266858 A CN202010266858 A CN 202010266858A CN 113497658 B CN113497658 B CN 113497658B
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channel
type signal
signal
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devices
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CN113497658A (en
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陈咪咪
周化雨
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition

Abstract

An anti-interference method and device for a complex communication scene, a storage medium and a terminal, wherein the method comprises the following steps: transmitting a first type signal to indicate that a current channel is in an idle state; wherein the first type of signal is identifiable by one or more devices and is used to indicate that a third party device other than the device communicating using the current channel remains silent. The scheme of the invention can effectively solve the hidden node problem under complex communication scene such as multi-communication system coexistence scene, and improve the reliability of the communication system.

Description

Anti-interference method and device for complex communication scene, storage medium and terminal
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an anti-interference method and apparatus for a complex communication scenario, a storage medium, and a terminal.
Background
The equipment adopting the technology of New wireless in an unlicensed frequency band (New Radio-Unlicensed Spectrum, NR-U for short) works in the unlicensed frequency band, and because the equipment of other systems such as Wi-Fi equipment also works in the unlicensed frequency band, the interference problem of the equipment of other systems needs to be considered when the NR-U equipment communicates.
As shown in fig. 1, in the NR-U system, a base station (g-NodeB, abbreviated as gNB) 11 wants to perform downlink communication with a User Equipment (User Equipment, abbreviated as UE) 12, and a wireless Access Point (AP) 13 is communicating with the UE 12. The signal coverage of the base station 11 is shown as a range a1, the signal coverage of the UE12 is shown as a range a2, and the signal coverage of the AP13 is shown as a range a 3.
The base station 11 is not in the listening range of the other party because it is too far from the AP 13. Therefore, the base station 11 does not sense that the AP13 is occupying the channel when the base station 11 listens before transmitting (Listen Before Talk, LBT for short), and the base station 11 starts downlink communication with the UE12 after the LBT is successful.
In this way, the AP13 and the base station 11 collide at the receiving end UE12, resulting in failure of the UE12 to successfully receive the message of the base station 11.
Alternatively, the AP13 sends a short Request To Send (RTS) frame when it wants To communicate with the UE12, and the UE12 does not know that the base station 11 wants To communicate with it, so a short Clear To Send (CTS) frame is fed back. When the AP13 is communicating with the UE12, the base station 11 also communicates downstream with the UE 12. At this time, a collision is also generated at the receiving end UE 12.
In the above case, the AP12 is the hidden node for the base station 11.
The prior art cannot provide a better solution to the hidden node problem, affecting the reliability of communication.
Disclosure of Invention
The invention solves the technical problem of solving the hidden node problem in complex communication scenes such as a multi-communication system coexistence scene and the like, and improves the reliability of the communication system.
In order to solve the above technical problems, an embodiment of the present invention provides an anti-interference method for a complex communication scenario, including: transmitting a first type signal to indicate that a current channel is in an idle state; wherein the first type of signal is identifiable by one or more devices and is used to indicate that a third party device other than the device communicating using the current channel remains silent.
Optionally, before sending the first type of signal, the anti-interference method further includes: and receiving channel state request information sent by the first equipment, wherein the channel state request information is used for confirming the channel state of the current channel.
Optionally, the third party device is a receiving device other than the first device.
Optionally, the first type of signal is a first preamble, where a sequence format of the first preamble is determined according to a preamble sequence format that can be decoded by a communication system to which the third party device belongs, or is determined by the third party device and a first device together, where the first device is a device that uses the current channel for communication.
Optionally, the anti-interference method further includes: and after the communication with the first device is finished, sending a second type signal to indicate that the channel occupation is finished, wherein the second type signal can be identified by one or more devices, and the first device is a device which uses the current channel for communication.
Optionally, the second type of signal is a second preamble, where a sequence format of the second preamble is determined according to a preamble sequence format that can be decoded by a communication system to which the third party device belongs, or is determined by the third party device and the first device together.
Optionally, the first type signal and the second type signal are both preambles, and the sequences of the first type signal and the second type signal are orthogonal.
Optionally, the first type of signal further includes: and channel occupancy information, wherein the channel occupancy information is identifiable by one or more devices, and the channel occupancy information is at least used for indicating the channel occupancy duration of the current channel.
Optionally, the step of transmitting the first type of signal is performed repeatedly periodically; and/or the step of transmitting the channel occupancy information is periodically and repeatedly performed while transmitting the first type of signal and during the channel occupancy time period.
Optionally, the complex communication scenario includes a multi-communication system coexistence scenario, wherein the multi-communication system includes an NR-U system and a Wi-Fi system.
Optionally, the one or more devices are devices belonging to different communication systems, or the one or more devices are devices belonging to different cells of the same communication system.
Optionally, the third party device and the first device belong to different communication systems, or the third party device and the first device belong to different cells in the same communication system, where the first device is a device that uses the current channel for communication.
In order to solve the above technical problem, the embodiment of the present invention further provides an anti-interference method for a complex communication scenario, including: in response to receiving the first type of signal, keeping silent; wherein the first type of signal is used to indicate that a current channel is in an idle state, the first type of signal is identifiable by one or more devices and is used to indicate that a third party device other than a device communicating using the current channel remains silent.
Optionally, the first type of signal is a first preamble, where a sequence format of the first preamble is determined according to a preamble sequence format that can be decoded by a communication system to which the third party device belongs, or is determined by the third party device and a first device together, where the first device is a device that uses the current channel for communication.
Optionally, the anti-interference method further includes: in response to receiving the second type of signal, the silence is de-muted, wherein the second type of signal is identifiable by one or more devices.
Optionally, the second type of signal is a second preamble, where a sequence format of the second preamble is determined according to a preamble sequence format that can be decoded by a communication system to which the third party device belongs, or is determined by the third party device and a first device together, where the first device is a device that uses the current channel for communication.
Optionally, the first type signal and the second type signal are both preambles, and the sequences of the first type signal and the second type signal are orthogonal.
Optionally, the first type of signal further includes: channel occupancy information, wherein the channel occupancy information is identifiable by one or more devices, the channel occupancy information being at least used to indicate a channel occupancy duration of a current channel; the anti-interference method further comprises the following steps: starting to count from the time of receiving the first type signal, and removing silence when the counted time exceeds the channel occupation time indicated by the channel occupation information.
Optionally, the first type of signal is periodically repeated; and/or, the channel occupation information is periodically and repeatedly transmitted while the first type signal is transmitted and within the channel occupation duration.
Optionally, the complex communication scenario includes a multi-communication system coexistence scenario, wherein the multi-communication system includes an NR-U system and a Wi-Fi system.
Optionally, the one or more devices are devices belonging to different communication systems, or the one or more devices are devices belonging to different cells of the same communication system.
Optionally, the third party device and the first device belong to different communication systems, or the third party device and the first device belong to different cells in the same communication system, where the first device is a device that uses the current channel for communication.
In order to solve the above technical problem, an embodiment of the present invention further provides an anti-interference device for a complex communication scenario, including: the transmitting module is used for transmitting a first type signal to indicate that the current channel is in an idle state; wherein the first type of signal is identifiable by one or more devices and is used to indicate that a third party device other than the device communicating using the current channel remains silent.
In order to solve the above technical problem, an embodiment of the present invention further provides an anti-interference device for a complex communication scenario, including: a keep-silent module that keeps silent in response to receiving the first type of signal; wherein the first type of signal is used to indicate that a current channel is in an idle state, the first type of signal is identifiable by one or more devices and is used to indicate that a third party device other than a device communicating using the current channel remains silent.
To solve the above technical problem, an embodiment of the present invention further provides a storage medium having stored thereon computer instructions which, when executed by a processor, perform the steps of the above method.
In order to solve the technical problem, the embodiment of the invention also provides a terminal, which comprises a memory and a processor, wherein the memory stores computer instructions capable of running on the processor, and the processor executes the steps of the method when running the computer instructions.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
on the UE side, the embodiment of the present invention provides an anti-interference method for a complex communication scenario, including: transmitting a first type signal to indicate that a current channel is in an idle state; wherein the first type of signal is identifiable by one or more devices and is used to indicate that a third party device other than the device communicating using the current channel remains silent.
By adopting the scheme of the embodiment, the hidden node problem under complex communication scenes such as a multi-communication system coexistence scene can be effectively solved, and the reliability of the communication system is improved. Specifically, since the first type of signal can be identified by the third party device, the third party device can accurately acquire the instant state of the UE and enter the silent state in time, so as to avoid becoming a hidden node of the device communicating with the UE through the current channel.
Further, in the coexistence scenario of multiple communication systems, since the first type of signal can be identified by the devices of different communication systems, the devices of each communication system can accurately acquire the instant state of the UE, and select an appropriate response mechanism according to their roles, thereby eliminating the potential hidden node.
On the third party device side, the embodiment of the invention also provides an anti-interference method for a complex communication scene, which comprises the following steps: in response to receiving the first type of signal, keeping silent; wherein the first type of signal is used to indicate that a current channel is in an idle state, the first type of signal is identifiable by one or more devices and is used to indicate that a third party device other than a device communicating using the current channel remains silent.
Therefore, in response to receiving the first type signal, the third party equipment can accurately acquire the instant state of the UE and keep silent in time so as to avoid conflict at the UE end, and the communication reliability is improved.
Drawings
FIG. 1 is a schematic diagram of a multi-communication system coexistence scenario of the prior art;
fig. 2 is a flowchart of an anti-interference method for a complex communication scenario according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of an anti-interference device for a complex communication scenario according to a second embodiment of the present invention;
FIG. 4 is a flow chart of an anti-interference method for a complex communication scenario according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of an anti-interference device for a complex communication scenario according to a fourth embodiment of the present invention;
fig. 6 is a schematic diagram of an exemplary application scenario according to an embodiment of the present invention.
Detailed Description
As described in the background, in a multi-communication system coexistence scenario, the prior art cannot provide a better solution to the hidden node problem, which affects the communication reliability.
Specifically, hidden node problems are addressed in existing Wi-Fi systems by RTS/CTS mechanisms. The RTS and CTS frames include a receiving end address and a duration. After receiving RTS and CTS, nodes near the transmitting end and receiving end keep silent for the duration of the communication to prevent interference.
Hidden node problems also exist in NR-U systems or in NR-U and Wi-Fi systems co-existing. Although a similar RTS/CTS mechanism may be introduced, existing RTS/CTS frames cannot be directly applicable due to the differences of two different systems.
The present inventors have found through analysis that, in addition to the aforementioned multi-communication system coexistence scenario, similar hidden node problems may exist between devices belonging to different cells of an NR-U system even in a single NR-U system. For convenience of description, the two aforementioned scenarios are collectively referred to as a complex communication scenario in this embodiment.
In order to solve the above technical problems, an embodiment of the present invention provides an anti-interference method for a complex communication scenario, including: transmitting a first type signal to indicate that a current channel is in an idle state; wherein the first type of signal is identifiable by one or more devices and is used to indicate that a third party device other than the device communicating using the current channel remains silent.
By adopting the scheme of the embodiment, the hidden node problem under complex communication scenes such as a multi-communication system coexistence scene can be effectively solved, and the reliability of the communication system is improved. Specifically, since the first type of signal can be identified by the third party device, the third party device can accurately acquire the instant state of the UE and enter the silent state in time, so as to avoid becoming a hidden node of the device communicating with the UE through the current channel.
Further, in the coexistence scenario of multiple communication systems, since the first type of signal can be identified by the devices of different communication systems, the devices of each communication system can accurately acquire the instant state of the UE, and select an appropriate response mechanism according to their roles, thereby eliminating the potential hidden node.
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 2 is a flowchart of an anti-interference method for a complex communication scenario according to a first embodiment of the present invention.
The complex communication scenario may include: multiple communication systems co-existence scenario. Wherein the multi-communication system may include an NR-U system and a Wi-Fi system.
The complex communication scenario may further include: the device in a single communication system that needs to communicate with the UE performing the scheme of this embodiment belongs to the context of different cells of the communication system.
The solution of the present embodiment may be applied to a UE (User Equipment, abbreviated as UE) on a UE side, where the UE is a receiving end in this embodiment. In order to ensure that the devices of different communication systems can accurately know the instant state of the receiving end through processing logic similar to an RTS/CTS mechanism so as to eliminate hidden nodes.
Specifically, referring to fig. 2, the anti-interference method for a complex communication scenario according to the present embodiment may include the following steps:
step S101, a first type signal is sent to indicate that a current channel is in an idle state;
wherein the first type of signal is identifiable by one or more devices and is used to indicate that a third party device other than the device communicating using the current channel remains silent.
In one implementation, the step S101 may be performed in response to receiving Channel State request information (Channel state_request, abbreviated as chsta_request) sent by the first device. Wherein the channel state request information is used for requesting downlink communication with the UE. For example, the first device may be a base station.
Specifically, before the step S101, the anti-interference method of this embodiment may further include the steps of: receiving channel state request information sent by the first equipment; and detecting the channel state of the current channel in response to the channel state request information. Wherein, the channel state may be a busy state of the channel.
Further, when the detection result indicates that the channel state of the current channel is idle, the step S101 is performed.
For example, the first device may want to communicate downlink with the UE. The base station makes LBT before transmitting the downlink control information. After the LBT is successful, a signal requesting feedback of the channel state, i.e., channel state request information chsta_request, is sent to the UE at the beginning of a channel occupation time (Channel Occupied Time, simply referred to as the COT, also referred to as the channel occupation duration) to trigger the UE to perform channel detection. The channel state request information may be carried by a physical downlink control channel (Physical Downlink Control Channel, PDCCH for short), GC-PDCCH, or the like.
In one implementation, the first type signal (Channel state_clear, abbreviated as chsta_clear) may include an identification of the UE.
In response to receiving the first type of signal, the first device may begin downlink communications with the UE using the current channel, while the third party device begins to remain silent.
In one implementation, the third party device is a receiving device of the one or more devices other than the first device.
In particular, the third party device and the first device may belong to different communication systems. For example, the third party device may be an AP of a Wi-Fi system and the first device may be a base station of an NR-U system.
Alternatively, the embodiment is equally applicable to a scenario in which the third party device and the first device belong to different cells of the same communication system. For example, the first device may be a base station of an NR-U system, and the third party device may be another base station adjacent to the first device.
In one implementation, the first type of signal may be a first preamble. The sequence format of the first preamble is determined according to a preamble sequence format which can be decoded by a communication system to which the third party equipment belongs, so that the third party equipment can be ensured to be successfully decoded.
Taking the third party device as an AP of the Wi-Fi system as an example, the first preamble may be designed as a preamble similar to the Wi-Fi system, that is, includes a short training field (Short Training Field, STF for short) and a long training field (Long Training Field, LTF for short).
The short training field in the first preamble may be generated by a sequence cyclic shift of the short training field employed by the Wi-Fi system and repeated 10 times.
For example, a short training field S in the first preamble 1 Can be shown as equation 1:
alternatively, the first preamble may be determined by the third party device and the first device together to ensure that both devices can efficiently decode the first type of signal.
In one implementation, the step S101 may be periodically repeated.
In a specific implementation, the anti-interference method of this embodiment may further include the steps of: after the communication with the first device is completed, a second type signal (COT_end) is sent to indicate that the channel occupancy is completed, wherein the second type signal can be identified by one or more devices.
In particular, the end of communication with the first device may refer to a COT end.
Thus, by sending the second type of signal, the third party device is made aware that the channel occupancy has ended.
In one implementation, the second type of signal may be a second preamble. The sequence format of the second preamble may be determined according to a preamble sequence format that can be decoded by the communication system to which the third party device belongs, so as to ensure that the third party device can decode successfully.
Taking the third party device as an AP of the Wi-Fi system as an example, the second preamble may be designed as a preamble similar to the Wi-Fi system, that is, includes an STF and an LTF.
The STF in the second preamble may be generated by a sequence cyclic shift of the STF employed by the Wi-Fi system and repeated 10 times, and is different from the STF in the first preamble.
For example, STFS in the second preamble 2 May be as shown in equation 2:
alternatively, the second preamble may be determined by the third party device and the first device together.
In one implementation, the sequences of the first type of signal and the second type of signal are orthogonal to avoid mutual interference. For example, the aforementioned STFS 1 And STFS 2 Orthogonal.
In one implementation, the first type of signal may further include: and channel occupancy information, wherein the channel occupancy information is identifiable by one or more devices, and the channel occupancy information is at least used for indicating the channel occupancy duration of the current channel.
Thus, the UE need only send the first type of signal to inform the third party device how long it will be in communication with the first device and how long the channel will be occupied.
For example, the first type of signal may include the STFS described above 1 And LTF, may further include the channel occupancy information.
The channel occupancy information may be transmitted by the first device to the UE through the GC-PDCCH at the beginning of the COT.
The channel occupancy information may be sent via an uplink control channel and/or an uplink data channel.
In one implementation, the step of transmitting the channel occupancy information may be periodically repeated while the first type of signal is transmitted and during the channel occupancy period.
For example, in transmitting the STFS 1 And the LTF, and within the COT, the channel occupancy information may be periodically and repeatedly transmitted.
Also for example, the STFS 1 And the LTF may also be periodically repeated.
By the method, on the UE side, the hidden node problem in complex communication scenes such as a multi-communication system coexistence scene can be effectively solved, and the reliability of the communication system is improved. Specifically, since the first type of signal can be identified by the third party device, the third party device can accurately acquire the instant state of the UE and enter the silent state in time, so as to avoid becoming a hidden node of the device communicating with the UE through the current channel.
Further, in the coexistence scenario of multiple communication systems, since the first type of signal can be identified by the devices of different communication systems, the devices of each communication system can accurately acquire the instant state of the UE, and select an appropriate response mechanism according to their roles, thereby eliminating the potential hidden node.
Fig. 3 is a schematic structural diagram of an anti-interference device for a complex communication scenario according to a second embodiment of the present invention. It will be appreciated by those skilled in the art that the anti-interference device 2 for a complex communication scenario (hereinafter referred to simply as anti-interference device 2) in this embodiment may be used to implement the method technical solution described in the embodiment described in fig. 2.
Specifically, referring to fig. 3, the anti-interference device 2 according to the present embodiment may include: a transmitting module 21, configured to transmit a first type signal to indicate that the current channel is in an idle state; wherein the first type of signal is identifiable by one or more devices and is used to indicate that a third party device other than the device communicating using the current channel remains silent.
For more details of the working principle and the working manner of the anti-interference device 2, reference may be made to the description related to fig. 2, which is not repeated here.
Fig. 4 is a flowchart of an anti-interference method for a complex communication scenario according to a third embodiment of the present invention.
The scheme of the embodiment can be applied to a third party device side, such as being executed by an AP of a Wi-Fi system. To avoid the third party device becoming a hidden node of the first device by processing logic similar to the RTS/CTS mechanism.
Specifically, referring to fig. 4, the anti-interference method for a complex communication scenario according to the present embodiment may include the following steps:
step S301, in response to receiving the first type signal, keeping silent;
wherein the first type of signal is used to indicate that a current channel is in an idle state, the first type of signal is identifiable by one or more devices and is used to indicate that a third party device other than a device communicating using the current channel remains silent.
It will be appreciated by those skilled in the art that step S301 is regarded as a step performed in concert with step S101 described in the embodiment of fig. 2, and the two steps complement each other in terms of specific implementation principles and logic. Thus, the explanation of the nouns in this embodiment may refer to the related description of the embodiment shown in fig. 2, which is not repeated here.
In one implementation, the first type of signal may be a first preamble, where a sequence format of the first preamble is determined according to a preamble sequence format that can be decoded by a communication system to which the third party device belongs, or is determined by the third party device and the first device together.
In a specific implementation, the anti-interference method of this embodiment may further include the steps of: in response to receiving the second type of signal, the silence is de-muted, wherein the second type of signal is identifiable by one or more devices.
In one implementation, the second type of signal may be a second preamble, where a sequence format of the second preamble is determined according to a preamble sequence format that can be decoded by a communication system to which the third party device belongs, or is determined by the third party device and the first device together.
Further, the sequences of the first type of signal and the second type of signal are orthogonal.
In one implementation, the first type of signal may further include: and channel occupancy information, wherein the channel occupancy information is identifiable by one or more devices, and the channel occupancy information is at least used for indicating the channel occupancy duration of the current channel.
Correspondingly, the anti-interference method in this embodiment may further include the steps of: starting to count from the time of receiving the first type signal, and removing silence when the counted time exceeds the channel occupation time indicated by the channel occupation information.
Thus, it is not necessary to wait for the second type of signal, but it is directly calculated from the channel occupancy information in the first type of signal when the first device has finished occupying the channel.
In one implementation, the first type of signal may be periodically repeated.
In one implementation, the channel occupancy information may be periodically repeated while the first type of signal is being transmitted and during the channel occupancy period.
By the method, at the third party equipment side, in response to receiving the first type signal, the third party equipment can accurately acquire the instant state of the UE and keep silent in time so as to avoid conflict at the UE side, and the communication reliability is improved.
Fig. 5 is a schematic structural diagram of an anti-interference device for a complex communication scenario according to a fourth embodiment of the present invention. It will be appreciated by those skilled in the art that the anti-interference device 4 for a complex communication scenario (hereinafter referred to as the anti-interference device 4 for short) in this embodiment may be used to implement the method technical solution described in the embodiment described in fig. 4.
Specifically, referring to fig. 5, the anti-interference device 4 of the present embodiment may include: a keep-silent module 41 that keeps silent in response to receiving the first type of signal; wherein the first type of signal is used to indicate that a current channel is in an idle state, the first type of signal is identifiable by one or more devices and is used to indicate that a third party device other than a device communicating using the current channel remains silent.
For more details of the working principle and the working manner of the anti-interference device 4, reference may be made to the description related to fig. 4, which is not repeated here.
In a typical application scenario, referring to fig. 6, the base station 51 belongs to an NR-U system, the AP53 belongs to a Wi-Fi system, the signal coverage of the base station 51 is shown as a range b1 in the figure, the signal coverage of the UE52 is shown as a range b2 in the figure, and the signal coverage of the AP53 is shown as a range b3 in the figure. The base station 51 and the AP53 are hidden nodes of each other, limited by signal coverage.
In this application scenario, to perform downlink communication with the UE52, the base station 51 may perform operation s1 to send channel state request information to trigger the UE52 to perform channel detection.
When the UE52 performs channel detection and finds that the channel is idle, an operation s2 may be performed to feed back the first type signal. The first type of signal may be received by any node in the vicinity of the UE 52.
In response to receiving the first type signal, the base station 51 determines that the UE52 side channel is idle, and may start downlink transmission.
In response to receiving the first type of signal, the AP53 begins to remain silent.
Further, when the base station 51 and the UE52 complete communication, i.e., the COT ends, in order for the AP53 to know that the channel occupancy has ended. At the end of the COT, the UE52 may perform operation s3 to transmit a second type of signal to indicate the end of the channel occupancy.
In response to receiving the second type signal, the AP53 knows that channel occupancy is over and unmuted.
The first type signal and the second type signal may each be periodically repeated.
In a variant, the operation s3 may be omitted. At this time, the first type signal may include the channel occupation information. Thus, in response to receiving the first type of signal, the AP53 may determine that silence needs to be initiated and the duration of silence maintained.
Further, the AP53 may automatically deactivate silence when the duration of silence remains up to the COT indicated by the channel occupancy information.
Further, the embodiment of the invention also discloses a storage medium, on which computer instructions are stored, and the computer instructions execute the technical scheme of the method described in the embodiment shown in fig. 2 or fig. 4 when running. Preferably, the storage medium may include a computer-readable storage medium such as a non-volatile (non-volatile) memory or a non-transitory (non-transitory) memory. The storage medium may include ROM, RAM, magnetic or optical disks, and the like.
Further, the embodiment of the invention also discloses a terminal, which comprises a memory and a processor, wherein the memory stores computer instructions capable of running on the processor, and the processor executes the technical scheme of the method in the embodiment shown in the fig. 2 or fig. 4 when running the computer instructions. Preferably, the terminal may be a 5G user terminal, a base station or an AP.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.

Claims (17)

1. An anti-interference method for a complex communication scenario, comprising:
receiving channel state request information sent by first equipment, wherein the channel state request information is used for confirming the channel state of a current channel, and the channel state request information is sent after the first equipment LBT is successful and when the channel occupation time begins;
detecting a channel state of a current channel in response to the channel state request information;
if the detection result shows that the channel state of the current channel is idle, a first type signal is sent to indicate that the current channel is in an idle state;
wherein the first type signal is identifiable by a plurality of devices and is used for indicating that a third party device except the device using the current channel for communication keeps silent, and the first type signal also comprises channel occupation information, wherein the channel occupation information is identifiable by the plurality of devices and is at least used for indicating the channel occupation duration of the current channel, and the channel occupation information is sent through an uplink control channel and/or an uplink data channel;
the anti-interference method further comprises the following steps:
after the communication with the first device is finished, a second type signal is sent to indicate that the channel occupation is finished, wherein the second type signal can be identified by a plurality of devices, the first device is the device which uses the current channel for communication, and the third party device and the first device both belong to the plurality of devices;
the first type signal and the second type signal are all lead codes, and sequences of the first type signal and the second type signal are orthogonal; wherein the step of transmitting the first type of signal is periodically repeatedly performed; and/or the step of transmitting the channel occupancy information is periodically and repeatedly performed while transmitting the first type of signal and during the channel occupancy time period.
2. The tamper-evident method of claim 1, wherein the third party device is a receiving device other than the first device.
3. The interference prevention method of claim 1, wherein the first type of signal is a first preamble, wherein a sequence format of the first preamble is determined according to a preamble sequence format that can be decoded by a communication system to which the third party device belongs, or is determined by the third party device and a first device together, wherein the first device is a device that uses the current channel for communication.
4. The method according to claim 1, wherein the second type signal is a second preamble, and wherein a sequence format of the second preamble is determined according to a preamble sequence format that can be decoded by a communication system to which the third party device belongs, or is determined by the third party device and the first device together.
5. The interference avoidance method of any one of claims 1-4 wherein the complex communication scenario comprises a multi-communication system coexistence scenario wherein the multi-communication system comprises an NR-U system and a Wi-Fi system.
6. The interference prevention method according to any one of claims 1 to 4, wherein the plurality of devices are devices belonging to different communication systems, or wherein the plurality of devices are devices belonging to different cells of the same communication system.
7. The interference avoidance method of any of claims 1-4 wherein the third party device and first device belong to different communication systems or the third party device and first device belong to different cells in the same communication system, wherein the first device is a device that communicates using the current channel.
8. An anti-interference method for a complex communication scenario, comprising:
in response to receiving the first type of signal, keeping silent;
the first type signal is used for indicating that a current channel is in an idle state, the first type signal can be identified by a plurality of devices and is used for indicating that a third party device except for the device which uses the current channel for communication keeps silent, the device which uses the current channel for communication and the third party device belong to the plurality of devices, the first type signal also comprises channel occupation information, wherein the channel occupation information can be identified by the plurality of devices, the channel occupation information is at least used for indicating the channel occupation duration of the current channel, the channel occupation information is sent through an uplink control channel and/or an uplink data channel, the first type signal is sent when a detection result indicates that the channel state of the current channel is idle, the detection of the channel state of the current channel is performed in response to the reception of channel state request information, the channel state request information is received from the first device and is used for confirming the channel state of the current channel, and the channel state request information is sent after the first device LBT is successful and at the beginning of a channel occupation time;
the anti-interference method further comprises the following steps:
in response to receiving a second type signal or from receiving the first type signal, starting timing, and when the timing duration exceeds the channel occupation duration indicated by the channel occupation information, canceling silence, wherein the second type signal can be identified by a plurality of devices;
the first type signal and the second type signal are all lead codes, and sequences of the first type signal and the second type signal are orthogonal; wherein the first type of signal is periodically repeated; and/or, the channel occupation information is periodically and repeatedly transmitted while the first type signal is transmitted and within the channel occupation duration.
9. The method according to claim 8, wherein the first type of signal is a first preamble, and wherein a sequence format of the first preamble is determined according to a preamble sequence format that can be decoded by a communication system to which the third party device belongs, or is determined by the third party device and the first device together.
10. The method according to claim 8, wherein the second type signal is a second preamble, and wherein a sequence format of the second preamble is determined according to a preamble sequence format that can be decoded by a communication system to which the third party device belongs, or is determined by the third party device and the first device together.
11. The interference avoidance method according to any one of claims 8 to 10 wherein the complex communication scenario comprises a multi-communication system coexistence scenario wherein the multi-communication system comprises an NR-U system and a Wi-Fi system.
12. The interference prevention method according to any one of claims 8 to 10, wherein the plurality of devices are devices belonging to different communication systems, or wherein the plurality of devices are devices belonging to different cells of the same communication system.
13. The interference prevention method according to any one of claims 8 to 10, wherein the third party device and the first device belong to different communication systems or the third party device and the first device belong to different cells in the same communication system, wherein the first device is a device communicating using the current channel.
14. An anti-interference device for a complex communication scenario, comprising:
the sending module is used for sending a first type signal to indicate that the current channel is in an idle state if the detection result indicates that the channel state of the current channel is idle;
wherein the first type signal is identifiable by a plurality of devices and is used for indicating that a third party device except the device using the current channel for communication keeps silent, and the first type signal also comprises channel occupation information, wherein the channel occupation information is identifiable by the plurality of devices and is at least used for indicating the channel occupation duration of the current channel, and the channel occupation information is sent through an uplink control channel and/or an uplink data channel;
the anti-interference device further performs the steps of: after the communication with the first device is finished, a second type signal is sent to indicate that the channel occupation is finished, wherein the second type signal can be identified by a plurality of devices, the first device is the device which uses the current channel for communication, and the third party device and the first device both belong to the plurality of devices;
the first type signal and the second type signal are all lead codes, and sequences of the first type signal and the second type signal are orthogonal; wherein the step of transmitting the first type of signal is periodically repeatedly performed; and/or the step of transmitting the channel occupancy information is periodically and repeatedly performed while transmitting the first type of signal and during the channel occupancy time period;
wherein, the anti-interference device also executes the following steps: receiving channel state request information sent by first equipment, wherein the channel state request information is used for confirming the channel state of the current channel, and the channel state request information is sent after the first equipment LBT is successful and when the channel occupation time begins; and detecting the channel state of the current channel in response to the channel state request information.
15. An anti-interference device for a complex communication scenario, comprising:
a keep-silent module that keeps silent in response to receiving the first type of signal;
the first type signal is used for indicating that a current channel is in an idle state, the first type signal can be identified by a plurality of devices and is used for indicating that a third party device except for the device which uses the current channel for communication keeps silent, the device which uses the current channel for communication and the third party device belong to the plurality of devices, the first type signal also comprises channel occupation information, wherein the channel occupation information can be identified by the plurality of devices, the channel occupation information is at least used for indicating the channel occupation duration of the current channel, the channel occupation information is sent through an uplink control channel and/or an uplink data channel, the first type signal is sent when a detection result indicates that the channel state of the current channel is idle, the detection of the channel state of the current channel is performed in response to the reception of channel state request information, the channel state request information is received from the first device and is used for confirming the channel state of the current channel, and the channel state request information is sent after the first device LBT is successful and at the beginning of a channel occupation time;
the anti-interference device further performs the steps of: in response to receiving a second type signal or from receiving the first type signal, starting timing, and when the timing duration exceeds the channel occupation duration indicated by the channel occupation information, canceling silence, wherein the second type signal can be identified by a plurality of devices;
the first type signal and the second type signal are all lead codes, and sequences of the first type signal and the second type signal are orthogonal; wherein the first type of signal is periodically repeated; and/or, the channel occupation information is periodically and repeatedly transmitted while the first type signal is transmitted and within the channel occupation duration.
16. A storage medium having stored thereon computer instructions which, when executed by a processor, perform the steps of the method of any of claims 1 to 13.
17. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method of any of claims 1 to 13.
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