CN116134950A

CN116134950A - Interference cancellation method, apparatus, and computer-readable storage medium

Info

Publication number: CN116134950A
Application number: CN202080104268.3A
Authority: CN
Inventors: 杜冬阳; 黄钧蔚
Original assignee: Shenzhen Transsion Holdings Co Ltd
Current assignee: Shenzhen Transsion Holdings Co Ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2023-05-16
Also published as: WO2022027227A1

Abstract

Embodiments of the present application provide an interference cancellation method, apparatus, and computer-readable storage medium. According to the method, when the first communication equipment determines that the first connection beam is interfered, the second communication equipment sends the interference indication information for indicating that the first connection beam is interfered through the second connection beam without the interference, receives the interference indication information through the second connection beam, can timely acquire the condition that the first connection beam is interfered, and stops using the first connection beam for communication according to the interference indication information, so that unnecessary power consumption of the second communication equipment and unnecessary interference signals can be avoided, and an interference elimination effect is achieved.

Description

Interference cancellation method, apparatus, and computer-readable storage medium

Technical Field

Embodiments of the present application relate to communications technologies, and in particular, to an interference cancellation method, apparatus, and computer readable storage medium.

Background

Unlicensed spectrum refers to the public spectrum that can be used by any organization or individual, i.e., various devices are free to communicate over unlicensed bands. Currently, in the New frequency band 52GHz to 71GHz discussed by 3GPP, there is an unlicensed spectrum, so that there is a scenario where NR (New Radio) and WiFi coexist, and there are signal collision, and interference situations.

In some implementations, the NR and WiFi still have no common signaling to interactively coordinate resources, and the resource configurations such as bandwidth width and time unit are not necessarily the same, so that the NR and WiFi can easily interfere with each other when communicating in an unlicensed frequency band. In addition, there is a case of hidden node (hidden node problem), especially in the high frequency band of 52GHz to 71GHz, because the electromagnetic wave emitted by the system is a narrow beam with very concentrated power, the transmitting end (or receiving end) does not necessarily know the existing interference condition of the receiving end (or transmitting end), and there is no clear back-off mechanism, so that the interference may not be detected by the system, and thus the communication interference is aggravated. For example, the transmitting end detects that the existing resource is in an idle state and transmits the indication information to attempt to establish a connection with the receiving end, and at the moment, the receiving end is in an interference stage of other equipment, and cannot normally receive any information of the transmitting end, so that the transmitting end periodically and aperiodically transmits the connection establishment information to cause power consumption and form unnecessary interference signals at the moment; or the sending end knows that there is interference, but the receiving end does not know that there is interference at the sending end and still monitors resources continuously, or tries to send connection establishment information, so that power consumption and unnecessary interference signals are formed.

The foregoing description is provided for general background information and does not necessarily constitute prior art.

Disclosure of Invention

The embodiment of the application provides an interference elimination method, equipment and a computer readable storage medium, which are used for solving the problem that NR and WiFi are easy to interfere with each other in unlicensed frequency band communication.

In a first aspect, embodiments of the present application provide an interference cancellation method applied to a first communication device, where the first communication device and a second communication device are connected by a plurality of beams, the method includes:

and if the first connection beam is determined to have interference, transmitting interference indication information through a second connection beam without interference, wherein the interference indication information is used for indicating that the first connection beam has interference.

Optionally, sending the interference indication information through the second connection beam without interference includes:

and sending the interference indication information through downlink control information or uplink control information.

Optionally, the interference indication information includes index information of the first connection beam and/or a keep-silent time of the first connection beam.

Optionally, the keep-alive period is a period when the first connection beam needs to be temporarily stopped for communication if there is interference in the first connection beam.

Optionally, the interference indication information includes index information of the first connection beam and/or a transmission stop identification of the first connection beam.

Optionally, the stop transmission identifier is used for indicating that the first connection beam is stopped to be used for communication.

Optionally, if the first connection beam is determined to be idle, sending recovery indication information through the first connection beam or the second connection beam.

Optionally, the recovery indication information includes index information of the first connection beam and/or recovery transmission identification of the first connection beam.

Optionally, the resume transmission flag is used to indicate resume communication using the first connection beam.

Optionally, when the keep-silence time of the first connection beam ends or a resume communication instruction is received, determining that the first connection beam is idle, where the resume communication instruction is used to instruct that the original interference communication on the first connection beam ends.

Optionally, if channel occupied information is detected on the first connection beam, determining that interference exists on the first connection beam.

Optionally, the channel occupied information includes at least one of:

A connection request signal, a connection feedback signal.

Optionally, the connection request signal is RTS and the connection feedback signal is CTS.

Optionally, if it is determined that there is interference on the first connection beam, suspending communication using the first connection beam.

In a second aspect, embodiments of the present application provide an interference cancellation method applied to a second communication device, where the second communication device and the first communication device are connected through multiple beams, and the method includes:

receiving interference indication information through a second connection beam, wherein the interference indication information is used for indicating that interference exists in the first connection beam;

and according to the interference indication information, suspending the communication by using the first connection beam.

Optionally, the receiving the interference indication information through the second connection beam includes:

receiving downlink control information containing interference indication information through the second connection beam;

or alternatively, the process may be performed,

and receiving uplink control information containing interference indication information through the second connection beam.

Optionally, the keep-alive silence time is a time when the first connection beam has interference and needs to be temporarily stopped for communication using the first connection beam.

Optionally, the suspending the communication using the first connection beam according to the interference indication information includes:

and temporarily stopping the communication by using the first connection beam corresponding to the index information until the silence keeping time is over, or receiving a communication restoration instruction.

and stopping using the first connection beam corresponding to the index information to communicate according to the transmission stopping identification.

Optionally, the recovery indication information is received through the first connection beam or the second connection beam.

Optionally, according to the resume transmission identifier, resuming the communication using the first connection beam.

Optionally, suspending the communication using the first connection beam according to the interference indication information, including:

Suspending sending data through the first connection beam according to the interference indication information;

or alternatively, the process may be performed,

and according to the interference indication information, suspending monitoring of the first connection beam.

In a third aspect, embodiments of the present application provide an interference cancellation apparatus applied to a first communication device, where the first communication device and a second communication device are connected by a plurality of beams, the apparatus including:

and the communication module is used for sending interference indication information through a second connection beam without interference if the first connection beam is determined to have interference, wherein the interference indication information is used for indicating the first connection beam to have interference.

Optionally, the communication module is further configured to:

and if the first connection beam is determined to be idle, sending recovery indication information through the first connection beam or the second connection beam.

Optionally, the apparatus further comprises: an interference cancellation module for:

and determining that the first connection beam is idle when the silence keeping time of the first connection beam is over or a recovery communication instruction is received, wherein the recovery communication instruction is used for indicating that the original interference communication on the first connection beam is over.

Optionally, the interference cancellation module is further configured to:

and if the channel occupied information is detected on the first connection beam, determining that interference exists on the first connection beam.

Optionally, the channel occupied information includes at least one of:

A connection request signal, a connection feedback signal.

Optionally, the interference cancellation module is further configured to:

and if the interference on the first connection beam is determined, stopping using the first connection beam for communication.

In a fourth aspect, embodiments of the present application provide an interference cancellation apparatus applied to a second communication device, where the second communication device is connected to a first communication device through multiple beams, the apparatus including:

the communication module is used for receiving interference indication information through the second connection beam, and the interference indication information is used for indicating that interference exists in the first connection beam;

and the interference elimination module is used for suspending the communication by using the first connection beam according to the interference indication information.

Optionally, the communication module is further configured to:

or alternatively, the process may be performed,

Optionally, the interference cancellation module is further configured to:

Optionally, the communication module is further configured to:

and receiving recovery indication information through the first connection beam or the second connection beam.

Optionally, the interference cancellation module is further configured to:

and restoring to use the first connection beam for communication according to the restoring transmission identification.

Optionally, the interference cancellation module is further configured to:

or alternatively, the process may be performed,

In a fifth aspect, embodiments of the present application provide a communication device, including: a processor and a memory;

the memory stores computer-executable instructions;

the computer-executable instructions, when executed by the processor, implement the method of any of the above aspects.

In a sixth aspect, embodiments of the present application provide a computer-readable storage medium having stored therein computer-executable instructions for performing the method of any one of the above aspects when the computer-executable instructions are executed by a processor.

According to the interference elimination method, the equipment and the computer readable storage medium, when the first communication equipment determines that the first connection beam is interfered, the interference indication information for indicating that the first connection beam is interfered is sent through the second connection beam without the interference, the second communication equipment receives the interference indication information through the second connection beam, the condition that the first connection beam is interfered can be timely obtained, and according to the interference indication information, the first connection beam is suspended to be used for communication, so that unnecessary power consumption of the second communication equipment and unnecessary interference signals can be avoided, and the interference elimination effect is achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic diagram of a communication system architecture according to an embodiment of the present application;

fig. 2 is a schematic diagram of a scenario in which NR and WiFi interfere with each other according to an embodiment of the present application;

fig. 3 is a schematic diagram of another scenario in which NR and WiFi interfere with each other provided in an embodiment of the present application;

fig. 4 is a flowchart of an interference cancellation method according to a first embodiment of the present application;

FIG. 5 is a schematic diagram of a typical multi-TRP connection scenario provided in an embodiment of the present application;

FIG. 6 is a schematic diagram of another exemplary multi-TRP connection scenario provided by embodiments of the present application;

fig. 7 is a flowchart of an interference cancellation method according to a second embodiment of the present application;

fig. 8 is a schematic structural diagram of an interference cancellation device according to a third embodiment of the present application;

fig. 9 is a schematic structural diagram of an interference cancellation device according to a fourth embodiment of the present application;

fig. 10 is a schematic structural diagram of an interference cancellation device according to a fifth embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device according to a seventh embodiment of the present application.

Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope herein. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context. Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, steps, operations, elements, components, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, steps, operations, elements, components, items, categories, and/or groups. The terms "or" and/or "as used herein are to be construed as inclusive, or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; A. b and C). An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.

The interference cancellation method provided by the embodiment of the application can be applied to the communication system architecture schematic diagram shown in fig. 1. As shown in fig. 1, the communication system includes: a network device and a plurality of terminal devices, which are assumed to include terminal device 1, terminal device 2, terminal device 3, and terminal device 4 in the figure. It should be noted that the communication system shown in fig. 1 may be applicable to different network systems, for example, GSM (Global System of Mobile communication, global system for mobile communications), CDMA (Code Division Multiple Access ), WCDMA (Wideband Code Division Multiple Access, wideband code Division multiple access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, time Division synchronous code Division multiple access), LTE (Long Term Evolution ) system, and future 5G network systems. Alternatively, the communication system may be a system in a scenario of URLLC (Ultra-Reliable and Low Latency Communications, high reliability low latency communication) transmission in a 5G communication system.

Thus, the network device may alternatively be a BTS (Base Transceiver Station, base station) and/or a base station controller in GSM or CDMA, or may also be a NB (NodeB, base station) and/or an RNC (Radio Network Controller ) in WCDMA, or may also be an evolved eNB (Evolutional Node B, base station) or eNodeB in LTE, or a relay station or access point, or a base station (gNB) in a future 5G network, or the like, which is not limited herein.

The terminal device may be a wireless terminal or a wired terminal. A wireless terminal may be a device that provides voice and/or other traffic data connectivity to a user, a handheld device with wireless connectivity, or other processing device connected to a wireless modem. The wireless terminal may communicate with one or more core network devices via a RAN (Radio Access Network ), which may be mobile terminals such as mobile phones (or "cellular" phones) and computers with mobile terminals, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access network. As another example, the wireless terminal may also be a PCS (Personal Communication Service ) phone, cordless phone, SIP (Session Initiation Protocol, session initiation protocol) phone, WLL (Wireless Local Loop ) station, PDA (Personal Digital Assistant, personal digital assistant) or the like. A wireless Terminal may also be referred to as a system, subscriber Unit (Subscriber Unit), subscriber Station (Subscriber Station), mobile Station (Mobile Station), mobile Station (Mobile), remote Station (Remote Station), remote Terminal (Remote Terminal), access Terminal (Access Terminal), user Terminal (User Terminal), user Agent (User Agent), user equipment (User Device or User Equipment), without limitation. Optionally, the terminal device may also be a device such as a smart watch or a tablet computer.

The specific application scene of the embodiment of the application is as follows: currently, for the unlicensed frequency band from 52GHz to 71GHz, various devices can freely communicate in the unlicensed frequency band, so that signal collision, collision and interference can occur, and meanwhile, considering that WiFi 802.11ad has a communication mode of LBT (Listen before talk ) operated in the same unlicensed frequency band by related standards, a scene of coexistence of NR and WiFi is also required to be considered. The present embodiment is exemplarily described with reference to a 71GHz high frequency unlicensed band.

One possible solution is: a WiFi 802.11ad LBT mode is adopted, such as DCF (Distributed Coordination Function ); further, a directional (directional) LBT communication scheme may be adopted, and since a high frequency signal is easily attenuated and a communication distance is short, it is necessary to complement the congenital defect by a beam forming (Beamforming) scheme. To sum up, LBT is implemented on a directional communication basis.

In addition, it is also possible to consider the hidden node (hidden node problem), that is, the sender does not necessarily know the existing condition of the receiver, and the receiver may be in an interference phase, and LBT based on receiver assistance (Receiver assisted/based) may be used.

Another possible solution is: wiFi DCF is used. In this scheme, RTS (Request to send) is a signal used by a transmitting end to establish a connection Request with a receiving end, and CTS (Clear to send) is a signal used by a receiving end to feed back the connection Request established by the transmitting end, that is, feedback information after the receiving end receives the RTS sent by the transmitting end. The specific flow of the scheme is as follows:

step 1, a sending end monitors (list) DIFS (Distributed Inter-frame Spacing) duration on an immediate sending resource, and sends RTS information after confirming that the resource is idle.

And 2, after receiving the RTS information, the receiving end monitors (Listen) SIFS (Short Interframe Space, short inter-frame space) duration on the resource and sends CTS information after confirming that the resource is idle.

And step 3, when the sending end receives the fed back CTS information, the sending end can start to perform data transmission with the receiving end.

And step 4, if an exceptional condition occurs, the sending end needs to resend the RTS information.

Among other things, the exceptional cases include: the receiving end cannot normally receive RTS information, so that CTS information cannot be fed back; CTS information fed back by the receiving end cannot be received by the transmitting end.

Since there is no common signaling for NR and WiFi to coordinate resources interactively, and the resource configuration (e.g. bandwidth width, time unit, etc.) is not necessarily the same, the NR and WiFi communication in the unlicensed frequency band are easy to interfere with each other.

In a possible scenario, consider the case where there is a hidden node (hidden node problem): the transmitting end does not necessarily know the existing interference situation of the receiving end completely, and there is no explicit back-off mechanism, so that interference may be aggravated.

Specifically, the transmitting end detects that the existing resource is in an idle state, and transmits the indication information to attempt to establish a connection with the receiving end, at this time, the receiving end is in an interference stage of other devices, and cannot normally receive any information of the transmitting end, so that the transmitting end periodically or aperiodically transmits the connection establishment information, at this time, power consumption of the transmitting end is caused, and unnecessary interference signals are formed.

For example, in the scenario where NR and WiFi interfere with each other as shown in fig. 2 and 3, a WiFi AP (access point) is a WiFi device, trp#1 and trp#2 are two TRPs (Transmission Reception Point, transmission reception points) of a base station, and UE beam#1 are beams where a terminal (ue#1) is connected to trp#1 and trp#2, respectively.

As shown in fig. 2, the terminal (ue#1) receives an RTS signal that a beam transmitted by the WiFi AP points to the WiFi UE, and the terminal determines that there is an interference source: the terminal (ue#1) establishes a connection with trp#1 and trp#2 of the base station, when the terminal receives an RTS signal transmitted by the WiFi AP on a beam (UE beam#1) connected with trp#1, the terminal knows that resources in this direction (e.g., UE beam#1 of a diagonally filled portion in fig. 2) will be used, will not normally communicate with trp#1, and when trp#1 does not know that resources in this direction (UE beam#1) will be used, because CTS messages transmitted back by the WiFi UE are not received by trp#1 due to coverage limitation.

As shown in fig. 3, the RTS signal initiated by the WiFi AP is directed to the WiFi UE, and the base station (TRP # 1) determines that the RTS signal is interfered: the terminal establishes a connection with the base station (TRP #1 and TRP # 2), at which time the base station receives the RTS signal transmitted by the WiFi AP on the beam on TRP #1, the base station knows that the resources in this direction (e.g., the beam on TRP #1 of the base station of the diagonally filled portion in fig. 3) will be used, will not normally communicate with the terminal, and at which time the terminal does not know that the resources in this direction will be used, because the RTS message transmitted by the WiFi AP is not received by the terminal due to the limitation of coverage.

According to the interference elimination method, when the first communication device and the second communication device are connected through the plurality of beams, if the first communication device determines that interference exists on the first connection beam, interference indication information is sent through the second connection beam without the interference, the interference indication information is used for indicating the first connection beam to have the interference, namely, the second communication device is informed of the second connection beam without the interference, so that the second communication device can know that the current first connection beam has the interference, and the first connection beam is suspended to be used for communication, the situation that RTS or CTS is not received by a receiving end due to the limitation of coverage of different systems can be avoided, power consumption of the second communication device and unnecessary interference signals are formed can be avoided, and the purpose of eliminating the interference signals is achieved.

The following describes in detail, with specific embodiments, a technical solution of an embodiment of the present application and how the technical solution of the present application solves the foregoing technical problems. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 4 is a flowchart of an interference cancellation method according to a first embodiment of the present application. As shown in fig. 4, the method specifically comprises the following steps:

in step S401, if the first communication device determines that there is interference on the first connection beam, the first communication device sends interference indication information through the second connection beam without interference, where the interference indication information is used to indicate that the first connection beam has interference.

In this embodiment, the first communication device and the second communication device are connected by a plurality of beams.

The first communication device may be a terminal device or a network device, and may be used as a transmitting end or a receiving end. When the first communication device and the second communication device communicate, the first communication device may be used as a transmitting end or a receiving end, and the second communication device may also be used as a transmitting end or a receiving end. When the first communication device is used as a transmitting end, the second communication device is used as a receiving end, and when the first communication device is used as a receiving end, the second communication device is used as a transmitting end. In addition, the first communication device may be a terminal device or a network device, where the second communication device is a network device when the first communication device is a terminal device, and where the first communication device is a network device, the second communication device is a terminal device.

In this embodiment, in the communication process between the first communication device and the second communication device, if it is determined that there is interference on the first connection beam, the second communication device sends interference indication information through the second connection beam without interference, and the second communication device is notified that there is interference on the first connection beam.

In step S402, the second communication device receives interference indication information through the second connection beam, where the interference indication information is used to indicate that interference exists in the first connection beam.

In the process of communicating with the first communication device, the second communication device receives interference indication information for indicating that the first connection beam has interference through the second connection beam, so that the condition that the first connection beam has interference can be known.

In step S403, the second communication device suspends the communication using the first connection beam according to the interference indication information.

After receiving the interference indication information, the second communication device can determine that the current first connection beam has interference, and pause the communication using the first connection beam, so that unnecessary interference caused by power consumption and continuous data transmission or monitoring through the first connection beam can be avoided.

In this embodiment, if the first communication device is a transmitting end, the transmitting end notifies the receiving end (the second communication device) to suspend communication (monitoring) on the interfered resource through another set of connection resources (the second connection beam) under the condition that other device interference occurs on one set of connection resources (the first connection beam); if the first communication device is a receiving end, the receiving end informs the sending end to suspend communication (sending) on the interfered resource through the other set of connection resources (second connection beam) under other standby interference on one set of connection resources (first connection beam); thus, in the scene that a plurality of sets of connection resources (connection resources in a plurality of directions and complementarily) exist between the first communication device and the second communication device, a rollback mechanism is added, and interference is avoided.

According to the method and the device for processing the interference signals, when the first communication equipment determines that the first connection beam is interfered, the second communication equipment sends the interference indication information for indicating that the first connection beam is interfered through the second connection beam without the interference, receives the interference indication information through the second connection beam, can timely acquire the condition that the first connection beam is interfered, and stops using the first connection beam for communication according to the interference indication information, so that unnecessary power consumption of the second communication equipment and unnecessary interference signals can be avoided, and the effect of eliminating the interference is achieved.

At the high frequency 71GHz band, there is a portion of the band coinciding with the 802.11ad, so the problem of channel access is a first problem to be solved in a high frequency system. RTS/CTS has attracted attention as a technique already used in 802.11 ad. In a new high frequency scenario, the RTS/CTS based channel access method needs to be re-designed. Fig. 5 provides a typical multi-TRP connection scenario in a high frequency beam-based system, as shown in fig. 5, where the NR base station connects with the NR UE (as shown in fig. 5) through multiple TRPs (as shown in fig. 5 for TRP/panel 1 and TRP/panel 2), where the NR UE 1 may form two receive beams to receive signals from TRP/panel 1 and TRP/panel 2, respectively. At this time, there is a hidden node WIFI AP of WIFI between TRP/panel 1 and NR UE 1, at this time, the WIFI AP sends RTS to WIFI UE 2, and NR UE 1 can receive the RTS because the received beam is in the same direction, so that it can keep silent, and temporarily no longer communicates with the base station, after receiving the RTS sent by the WIFI AP, WIFI UE 2 will send a CTS message back to the WIFI AP, but at this time, because of limitation of coverage, the CTS may not be received by the NR base station, so at this time TRP/panel 1 may continue to send a message to NR UE 1 on the beam, and further cause interference to WIFI communication.

Fig. 6 provides another exemplary multi-TRP connection scenario in a high frequency beam-based system, such as the scenario shown in fig. 6, where an NR base station connects with an NR UE (such as the NR UE 1 shown in fig. 6) through multiple TRPs (such as TRP/panel 1 and TRP/panel 2 shown in fig. 6), where the NR UE 1 may form two receive beams to receive signals from TRP/panel 1 and TRP/panel 2, respectively. At this time, a hidden node WIFI AP of a WIFI is arranged on one side of the TRP/panel 1 far away from the NR UE 1, the TRP/panel 1 is arranged between the WIFI AP and the WIFI UE2, at this time, the WIFI AP sends RTS to the WIFI UE2, and the NR UE 1 cannot receive the RTS of the WIFI AP due to the limitation of coverage range; after receiving the RTS, the WIFI UE2 sends a CTS to the WIFI AP, and the TRP/panel 1 can receive the CTS because the received beam is in the same direction, that is, the TRP/panel 1 can receive the CTS of the WIFI UE2, but the NR UE 1 cannot receive the RTS of the WIFI AP, so at this time, the NR UE 1 may continue to send a message to the TRP/panel 1 on the beam, which further leads to interference on WIFI communication.

Fig. 7 is a flowchart of an interference cancellation method according to a second embodiment of the present application. On the basis of the first embodiment, in this embodiment, a specific implementation manner of the interference cancellation method provided in this embodiment is exemplarily described based on the application scenario shown in fig. 5 or fig. 6. As shown in fig. 7, the method specifically comprises the following steps:

In step S501, if the first communication device detects that the channel is occupied on the first connection beam, it determines that there is interference on the first connection beam.

In this embodiment, the first communication device and the second communication device are connected by a plurality of beams. The method and the device can be particularly applied to a scenario of high-frequency unlicensed band multi-beam connection, wherein multi-beams can be realized through a plurality of TRPs or a single TRP, and the embodiment is not particularly limited herein.

Wherein the first connection beam is used to refer to a connection beam with interference and the second connection beam is used to refer to a connection beam without interference. At different times, whether there is interference on each connection beam may change, and the connection beams included in the first connection beam and the second connection beam may also change.

The first connection beam with interference may have one or more, and if there are multiple first connection beams with interference, the first communication device may select to send interference indication information through other second connection beams without interference.

Wherein the channel occupied information includes at least one of: a connection request signal, a connection feedback signal.

Optionally, the connection request signal is RTS and the connection feedback signal is CTS. The channel occupied information may also include other information such as specific coincidence, and the embodiment is not specifically limited herein.

Illustratively, the channel occupied information detected on the first connection beam may be an RTS signal, or a CTS signal, or a specific symbol, which is received on the first connection beam and sent by the WiFi AP; or the signal strength detected on the first connection beam is above a threshold.

The specific symbol and the threshold may be configured and adjusted according to the actual application scenario, which is not specifically limited herein.

Step S502, if it is determined that there is interference on the first connection beam, the first communication device suspends communication using the first connection beam.

This step is performed when it is determined that there is interference on the first connection beam, and may be performed before step S503 or after step S503, which is not particularly limited herein.

When the first communication device determines that there is interference on the first connection beam, communication using the first connection beam is suspended in order to avoid causing unnecessary power consumption and interference.

In this step, the first communication device suspends communication using the first connection beam, comprising: suspending transmitting data over the first connection beam; and/or suspending listening to the first connection beam.

When the first communication device determines that the first connection beam is idle, communication using the first connection beam is resumed.

In step S503, the first communication device sends interference indication information through the second connection beam without interference, where the interference indication information is used to indicate that the first connection beam has interference.

Optionally, the first communication device may send the interference indication information through downlink control information or uplink control information.

For example, a control field may be set in DCI (Downlink Control Information ) or UCI (Uplink Control Information, uplink control information), through which interference indication information is transmitted on other second connection beams where no interference exists.

In step S504, the second communication device receives, through the second connection beam, interference indication information, where the interference indication information is used to indicate that interference exists in the first connection beam.

Optionally, the second communication device receives the interference indication information through a second connection beam, including:

the second communication equipment receives downlink control information containing interference indication information through a second connection beam; or the second communication device receives uplink control information containing the interference indication information through the second connection beam.

In step S505, the second communication device suspends the communication using the first connection beam according to the interference indication information.

In a possible embodiment, the interference indication information comprises index information of the first connection beam and/or a keep-alive silence time of the first connection beam. Wherein, keep the silence time as: if the first connection beam has interference, the time of communication using the first connection beam needs to be temporarily stopped, and index information of the first connection beam is used to indicate which beam has interference.

The first communication device determines that the first connection beam is idle when the hold silence time of the first connection beam is over or a communication restoration instruction is received, and resumes communication using the first connection beam.

Wherein the resume communication indication is used to indicate that the original interfering communication on the first connection beam is over. For example, the communication restoration instruction may be a signaling sent to the first communication device, where the signaling may be sent to the first communication device and may restore data transmission of the first connection beam, and indicate that the original interference communication on the first connection beam ends, specifically, who sends the instruction to the first connection beam or which specific information the communication restoration instruction includes, and the embodiment is not specifically limited herein.

In this step, the second communication device temporarily stops communication using the first connection beam corresponding to the index information according to the interference instruction information until the end of the hold silence time. The second communication device resumes communication using the first connection beam at the end of the keep-alive period of the first connection beam.

In another possible embodiment, the interference indication information includes index information of the first connection beam and/or a transmission stop identification of the first connection beam. The stop transmission flag is used to indicate that communication using the first connection beam is stopped.

Specifically, the second communication device stops using the first connection beam corresponding to the index information to communicate according to the stop transmission identifier; that is, when the second communication device receives the interference indication information including the stop transmission identifier, the second communication device stops using the first connection beam corresponding to the index information in the interference indication information to perform communication.

Further, if the first communication device determines that the first connection beam is idle, the first communication device sends recovery indication information through the first connection beam or the second connection beam. The recovery indication information includes index information of the first connection beam and/or recovery transmission identification of the first connection beam. The resume transmission identity is for indicating a resume of communication using the first connection beam.

The second communication device receives the restoration instruction information through the first connection beam or the second connection beam. And the second communication device resumes the communication using the first connection beam according to the resume transmission identification. That is, when receiving the restoration instruction information including the restoration transmission identifier, the second communication device resumes communication using the first connection beam corresponding to the index information in the restoration instruction information.

In this step, the second communication device suspends communication using the first connection beam according to the interference indication information, including: suspending sending data through the first connection beam according to the interference indication information; or suspending monitoring of the first connection beam according to the interference indication information.

For example, if the second communication device is the transmitting end, according to the interference indication information, the transmission of data through the first connection beam is suspended. If the second communication device is used as a receiving end, according to the interference indication information, the monitoring of the first connection beam is suspended.

Alternatively, a bit may be used to store a stop transmission identifier or a resume transmission identifier, e.g., a stop transmission identifier with a "0" and a resume transmission identifier with a "1".

In step S506, when the first communication device ends the hold silence period of the first connection beam or receives the communication restoration instruction, it determines that the first connection beam is idle, and resumes the communication using the first connection beam.

In step S507, when the hold silence time of the first connection beam ends or the recovery instruction information including the recovery transmission identifier is received, the second communication device resumes the communication using the first connection beam.

For example, based on the scenario shown in fig. 5 or fig. 6, in order to solve the technical problem existing in the scenario shown in fig. 5 or fig. 6, in the scenario of high-frequency unlicensed band multi-beam connection, the base station or the terminal currently has multiple beam connections. After detecting RTS or CTS on one or more beams (not all connected beams), in the corresponding uplink or downlink control information on the other one or more beams that do not receive RTS or CTS, sending a message containing the silence keeping time and the beam index information on the corresponding RTS or CTS, and after receiving the message field, the base station or the terminal knows on which beam needs to keep silence (no signal is sent); or sending indication information and beam index information corresponding to RTS or CTS in other uplink or downlink control information on one or more beams which do not receive RTS or CTS, wherein the indication information comprises a stop transmission identifier or a resume transmission identifier, and the base station or the terminal knows on which beam data transmission needs to be stopped or resumed after receiving the indication information and the beam index information.

For example, the RTS field may be as follows:

1.Frame Control

2.Duration

RA (Receiver Address), receiver Address

TA (Transmitter Address, sender Address)

Fcs (Frame Check Sequence )

The CTS field may be as follows:

1.Frame Control

2.Duration

3.RA

4.FCS

where Frame Control characterizes whether the transmitted data comes from a Control Frame or a management Frame. Duration indicates the time that the receiving end needs to wait to keep silent. When the terminal or the base station receives the RTS/CTS, the information (Duration) and the corresponding TRP or beam Index (TRP/beam Index) are sent to the receiving end through UCI or DCI on other beams without interference, so that the receiving end can know the time when the information needs to be stored for silence, and the condition that the RTS or the CTS is not received by the receiving end due to coverage limitation is avoided.

Then, as shown in fig. 5, there is a beam connection to NR UE 1 on TRP/panel 1, where there is an interfering WIFI AP, and after NR UE 1 receives the RTS sent by the WIFI AP, the Duration and beam Index (TRP/beam Index) information in the RTS is then composed into field [ Duration TRP/beam 1 ], and sent to TRP/panel 2 through UCI. At this point the base station may know that TRP/beam 1 has interference and also that the time Duration to keep silent is needed, even if in this case the CTS sent by NR UE 2 due to coverage is not received by TRP/panel 1.

For example, one bit may be used to store a stop transmission identifier or a resume transmission identifier, e.g., a stop transmission identifier with a "0" and a "1" for a resume transmission identifier.

Then, as shown in fig. 5, there is a beam connection on TRP/panel 1 to NR UE 1, where there is an interfering WIFI AP, after NR UE 1 receives an RTS sent by the WIFI AP, the method of NR UE 1 for determining that the channel is idle includes, but is not limited to, the following ways: the silence time is judged to have passed according to the Duration in the RTS/CTS received by the device or according to the received signaling capable of recovering the data transmission.

For example, in the case of multi-beam connection, the first communication device may store a vector therein, and store whether there is interference in the corresponding connection beam and the corresponding time for which silence needs to be maintained.

For example, as shown in fig. 5 with two connection beams in NR UE 1, NR UE 1 may hold the information shown in table 1 below:

TABLE 1

TRP 1	NAV
TRP
2	No

After NR UE 1 receives RTS on TRP 1 beam, it stores NAV (Network Allocation Vector ) to indicate interference on TRP 1 beam; at this point NR UE 1 may select a beam transmit message without interference, e.g., a beam transmit message on TRP 2, according to this table.

In the embodiment of the application, in a high-frequency unlicensed frequency band, under the condition of multi-beam connection, under the condition that one or more beams have co-channel interference, interference indication information is sent through other beams without interference, the interference indication information comprises index information of the connected beam with interference and/or corresponding silence keeping time, or index information of the connected beam with interference and/or stop/restore transmission identification; the interference indication information may be transmitted through UCI or DCI; therefore, the receiving end can know the time for keeping silence, avoid the occurrence of unnecessary power consumption and unnecessary interference signal formation of the receiving end caused by the fact that RTS or CTS is not received by the receiving end due to coverage limitation, and achieve the effect of eliminating interference.

Fig. 8 is a schematic structural diagram of an interference cancellation device according to a third embodiment of the present application. The interference cancellation apparatus provided in the embodiment of the present application may execute the processing flow executed by the first communication device in the first embodiment, where the first communication device and the second communication device are connected by a plurality of beams. As shown in fig. 8, the interference cancellation device 80 includes: a communication module 801.

Specifically, the communication module 801 is configured to send, if it is determined that interference exists on the first connection beam, interference indication information through the second connection beam where interference does not exist, where the interference indication information is used to indicate that interference exists on the first connection beam.

The interference cancellation device provided in the embodiment of the present application may be specifically used to execute the method flow executed by the first communication device in the first embodiment, and specific functions are not described herein.

Fig. 9 is a schematic structural diagram of an interference cancellation device according to a fourth embodiment of the present application. On the basis of the third embodiment, in this embodiment, the communication module 801 is further configured to:

and sending the interference indication information through the downlink control information or the uplink control information.

The hold silence time is a time when communication using the first connection beam needs to be temporarily stopped if there is interference in the first connection beam.

Wherein the stop transmission flag is used to instruct to stop using the first connection beam for communication.

Optionally, the communication module 801 is further configured to:

The recovery indication information comprises index information of the first connection beam and/or recovery transmission identification of the first connection beam. The resume transmission identity is for indicating a resume of communication using the first connection beam.

Optionally, as shown in fig. 9, the interference cancellation device 80 further includes: the interference cancellation module 802 is configured to:

and determining that the first connection beam is idle when the keeping silence time of the first connection beam is over or a recovery communication instruction is received, wherein the recovery communication instruction is used for indicating that the original interference communication on the first connection beam is over.

Optionally, the interference cancellation module 802 is further configured to:

If channel occupied information is detected on the first connection beam, then it is determined that interference exists on the first connection beam.

Optionally, the channel occupied information includes at least one of:

a connection request signal, a connection feedback signal.

Optionally, the interference cancellation module 802 is further configured to:

if it is determined that interference exists on the first connection beam, communication using the first connection beam is suspended.

The interference cancellation device provided in the embodiment of the present application may be specifically used to execute the method flow executed by the first communication device in the second embodiment, and specific functions are not described herein.

Fig. 10 is a schematic structural diagram of an interference cancellation device according to a fifth embodiment of the present application. The interference cancellation device provided in the embodiment of the present application may execute the processing flow executed by the second communication device in the first embodiment, where the first communication device and the second communication device are connected through a plurality of beams. As shown in fig. 10, the interference cancellation device 90 includes: a communication module 901 and an interference cancellation module 902.

Specifically, the communication module 901 is configured to receive, via the second connection beam, interference indication information, where the interference indication information is used to indicate that interference exists in the first connection beam.

The interference cancellation module 902 is configured to suspend communication using the first connection beam according to the interference indication information.

The interference cancellation device provided in the embodiment of the present application may be specifically used to execute the method flow executed by the second communication device in the first embodiment, and specific functions are not described herein.

On the basis of the fifth embodiment, in the sixth embodiment, the communication module 901 is further configured to:

receiving downlink control information containing interference indication information through a second connection beam; or, receiving uplink control information including interference indication information through the second connection beam.

The silence period is a period in which the first connection beam is interfered and communication using the first connection beam is temporarily stopped.

Optionally, the interference cancellation module 902 is further configured to:

and temporarily stopping the communication by using the first connection beam corresponding to the index information until the end of the silence keeping time or receiving a communication restoration instruction.

Optionally, the interference cancellation module 902 is further configured to:

and stopping using the first connection beam corresponding to the index information to communicate according to the stop transmission identification.

Optionally, the communication module 901 is further configured to:

the restoration instruction information is received through the first connection beam or the second connection beam.

The recovery indication information comprises index information of the first connection beam and/or recovery transmission identification of the first connection beam.

Optionally, the interference cancellation module 902 is further configured to:

and according to the recovery transmission identification, recovering to use the first connection beam for communication.

Optionally, the interference cancellation module 902 is further configured to:

suspending sending data through the first connection beam according to the interference indication information; or suspending monitoring of the first connection beam according to the interference indication information.

The interference cancellation device provided in the embodiment of the present application may be specifically used to execute the method flow executed by the second communication device in the second embodiment, and specific functions are not described herein.

In the embodiment of the present application, in a high-frequency unlicensed band, in a multi-beam connection situation, under the condition that one or more beams have co-channel interference, interference indication information is sent through other beams without interference, where the interference indication information includes index information of a connection beam with interference and/or corresponding silence keeping time, or index information of a connection beam with interference and/or stop/restore transmission identifier; the interference indication information may be transmitted through UCI or DCI; therefore, the receiving end can know the time for keeping silence, avoid the occurrence of unnecessary power consumption and unnecessary interference signal formation of the receiving end caused by the fact that RTS or CTS is not received by the receiving end due to coverage limitation, and achieve the effect of eliminating interference.

Fig. 11 is a schematic structural diagram of a communication device according to a seventh embodiment of the present application. As shown in fig. 11, the communication device includes: a processor 1001 and a memory 1002. Memory 1002 stores computer-executable instructions. The processor 1001 executes computer-executable instructions stored in the memory 1002, so that the processor 1001 executes a method flow executed by the first communication device or the second communication device in any of the above method embodiments.

The present application also provides a computer storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method performed by the first communication device or the second communication device in any of the method embodiments described above.

The present embodiments also provide a computer program product comprising computer program code which, when run on a computer, causes the computer to perform the method in the various possible implementations as above.

The embodiments also provide a chip including a memory for storing a computer program and a processor for calling and running the computer program from the memory, so that a device on which the chip is mounted performs the method in the above possible embodiments.

It should be noted that, in this document, step numbers such as S502 and S503 are adopted, and the purpose of the present invention is to more clearly and briefly describe the corresponding content, and not to constitute a substantial limitation on the sequence, and those skilled in the art may execute S503 before S502 in the implementation, which are all within the scope of protection of the present application.

It should be understood that, although the steps in the flowcharts in the above embodiments are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited in order and may be performed in other orders, unless explicitly stated herein. Moreover, at least some of the steps in the figures may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, the order of their execution not necessarily occurring in sequence, but may be performed alternately or alternately with other steps or at least a portion of the other steps or stages.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The embodiments of the present application are intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

An interference cancellation method applied to a first communication device, the first communication device and a second communication device being connected by a plurality of beams, the method comprising:

and if the first connection beam is determined to have interference, transmitting interference indication information through a second connection beam without interference, wherein the interference indication information is used for indicating that the first connection beam has interference.
The method of claim 1, wherein transmitting interference indication information over a second connection beam in which no interference is present comprises:

and sending the interference indication information through downlink control information or uplink control information.
The method of claim 1, wherein the interference indication information comprises index information of the first connection beam and/or a keep-quiet time of the first connection beam.
The method of claim 3, wherein the keep-alive period is a period of time required to temporarily cease communication using the first connection beam if the first connection beam is interfering.
The method of claim 1, wherein the interference indication information comprises index information of the first connection beam and/or a stop transmission identification of the first connection beam.
The method of claim 5, wherein the cease transmission flag is to indicate to cease communication using the first connection beam.
The method of claim 5, further comprising:

and if the first connection beam is determined to be idle, sending recovery indication information through the first connection beam or the second connection beam.
The method of claim 7, wherein the recovery indication information comprises index information of the first connection beam and/or a recovery transmission identity of the first connection beam.
The method of claim 8, wherein the resume transmission identification is used to indicate resumption of communication using the first connection beam.
A method according to claim 3, further comprising:

and determining that the first connection beam is idle when the silence keeping time of the first connection beam is over or a recovery communication instruction is received, wherein the recovery communication instruction is used for indicating that the original interference communication on the first connection beam is over.
The method of claim 1, further comprising:

and if the channel occupied information is detected on the first connection beam, determining that interference exists on the first connection beam.
The method of claim 11, wherein the channel occupied information comprises at least one of:

a connection request signal, a connection feedback signal.
The method of any one of claims 1 to 12, further comprising:

and if the interference on the first connection beam is determined, stopping using the first connection beam for communication.
An interference cancellation method applied to a second communication device, the second communication device being connected to a first communication device by multiple beams, the method comprising:

receiving interference indication information through a second connection beam, wherein the interference indication information is used for indicating that interference exists in the first connection beam;

and according to the interference indication information, suspending the communication by using the first connection beam.
The method of claim 14, wherein the receiving the interference indication information over the second connection beam comprises:

receiving downlink control information containing interference indication information through the second connection beam;

or alternatively, the process may be performed,

and receiving uplink control information containing interference indication information through the second connection beam.
The method of claim 14, wherein the interference indication information comprises index information of the first connection beam and/or a keep-quiet time of the first connection beam.
The method of claim 16, wherein the keep-alive quiet time is a time when the first connection beam is interfering and needs to temporarily cease communicating using the first connection beam.
The method of claim 17, wherein the suspending communication using the first connection beam according to the interference indication information comprises:

And temporarily stopping the communication by using the first connection beam corresponding to the index information until the silence keeping time is over, or receiving a communication restoration instruction.
The method of claim 14, wherein the interference indication information comprises index information of the first connection beam and/or a stop transmission identity of the first connection beam.
The method of claim 19, wherein the suspending communication using the first connection beam according to the interference indication information comprises:

and stopping using the first connection beam corresponding to the index information to communicate according to the transmission stopping identification.
The method of claim 20, further comprising:

and receiving recovery indication information through the first connection beam or the second connection beam.
The method of claim 21, wherein the recovery indication information comprises index information of the first connection beam and/or a recovery transmission identity of the first connection beam.
The method of claim 22, wherein,

and restoring to use the first connection beam for communication according to the restoring transmission identification.
The method of any of claims 14 to 23, wherein suspending communication using the first connection beam in accordance with the interference indication information comprises:

Suspending sending data through the first connection beam according to the interference indication information;

or alternatively, the process may be performed,

and according to the interference indication information, suspending monitoring of the first connection beam.
A communication device, comprising: a processor and a memory;

the memory stores computer-executable instructions;

the computer-executable instructions, when executed by the processor, implement the method of claim 1.
A computer readable storage medium having stored therein computer executable instructions for implementing the method of claim 1 when the computer executable instructions are executed by a processor.