CN111800809B - Channel monitoring method and communication equipment - Google Patents

Channel monitoring method and communication equipment Download PDF

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Publication number
CN111800809B
CN111800809B CN201910713243.2A CN201910713243A CN111800809B CN 111800809 B CN111800809 B CN 111800809B CN 201910713243 A CN201910713243 A CN 201910713243A CN 111800809 B CN111800809 B CN 111800809B
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channel
monitoring
channels
beam directions
idle
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CN111800809A (en
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姜蕾
潘学明
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Priority to CN201910713243.2A priority Critical patent/CN111800809B/en
Priority to PCT/CN2020/103062 priority patent/WO2021023002A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming

Abstract

The invention discloses a channel monitoring method and communication equipment, wherein the monitoring method comprises the following steps: when monitoring channels in a plurality of beam directions, monitoring the channels in the plurality of beam directions in sequence according to a preset rule. Therefore, before the communication equipment uses the high-frequency unlicensed spectrum for communication, when the directional LBT mode is adopted for monitoring the channels in the multiple beam directions in the unlicensed frequency band, the channels in the multiple beam directions can be monitored in sequence according to the preset rule, so that an effective channel monitoring mode can be provided, the communication equipment can be effectively accessed into the channels in the high-frequency unlicensed frequency band, and information transmission in the high-frequency unlicensed frequency band is further realized.

Description

Channel monitoring method and communication equipment
Technical Field
The present invention relates to the field of communications, and in particular, to a channel monitoring method and a communication device.
Background
In an existing communication system, communication devices (e.g., a terminal device, a network device, and a Wireless-Fidelity Access Point (Wi-Fi AP)) may communicate using an unlicensed band (unlicensed band). Generally, before a communication device uses an unlicensed frequency band to perform communication, the communication device needs to listen to a channel of the unlicensed frequency band (i.e., lbt (listen before talk)), and access the channel and perform communication when it is determined that the channel is in an idle state.
With the development of high-frequency communication technology, it has become a trend to use a high-frequency unlicensed frequency band for communication. When a communication device uses a high-frequency unlicensed frequency band for communication, a beamforming technique is usually used for communication, and before the communication, a directional lbt (directional lbt) manner may be used to monitor channels in multiple beam directions of the high-frequency unlicensed frequency band. However, in actual channel monitoring, for analog beams, directional LBT can only monitor channels in one beam direction at the same time, and cannot meet the requirement of monitoring channels in multiple beam directions.
Disclosure of Invention
The embodiment of the invention provides a channel monitoring method and communication equipment, which aim to solve the problem that the communication equipment cannot effectively monitor channels in multiple beam directions of a high-frequency unlicensed spectrum before using the high-frequency unlicensed spectrum for communication.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, a channel monitoring method is provided, including:
when monitoring channels in a plurality of beam directions, monitoring the channels in the plurality of beam directions in sequence according to a preset rule.
In a second aspect, a communication device is provided, comprising:
and the monitoring module is used for sequentially monitoring the channels in the plurality of beam directions according to a preset rule when monitoring the channels in the plurality of beam directions.
In a third aspect, a communication device is provided, comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to the first aspect.
In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method according to the first aspect.
According to the technical scheme provided by the embodiment of the invention, when the communication equipment monitors the channels in the plurality of beam directions, the communication equipment monitors the channels in the plurality of beam directions in sequence according to the preset rule. Therefore, before the communication equipment uses the high-frequency unlicensed frequency band for communication, when the directional LBT mode is adopted for monitoring the channels in the multiple beam directions under the unlicensed frequency spectrum, the channels in the multiple beam directions can be monitored in sequence according to the preset rule, and therefore an effective channel monitoring mode can be provided, the communication equipment can be effectively accessed into the channels of the high-frequency unlicensed frequency band, and information transmission under the high-frequency unlicensed frequency band is further achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flow chart of a channel monitoring method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a channel monitoring method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a channel monitoring method according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a channel monitoring method according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a communication device according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a channel monitoring method and communication equipment, wherein the monitoring method comprises the following steps: when monitoring channels in a plurality of beam directions, monitoring the channels in the plurality of beam directions in sequence according to a preset rule.
Therefore, before the communication equipment uses the high-frequency unlicensed spectrum for communication, when the directional LBT mode is adopted for monitoring the channels in the multiple beam directions under the unlicensed spectrum, the channels in the multiple beam directions can be monitored in sequence according to the preset rule, so that an effective channel monitoring mode can be provided, the communication equipment can be effectively accessed into the channels of the high-frequency unlicensed spectrum, and information transmission under the high-frequency unlicensed frequency band is further realized.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme of the invention can be applied to various communication systems, such as: long Term Evolution (LTE), Long Term Evolution enhanced Long Term Evolution (LTE-a), LTE Frequency Division Duplex (FDD), LTE Time Division Duplex (TDD), Universal Mobile Telecommunications System (UMTS) or Worldwide Interoperability for Microwave access (WiMAX), 5G, or New Radio (NR) systems, etc.
The Terminal device may be understood as a User Equipment (UE), which may also be referred to as a Mobile Terminal (Mobile Terminal), a Mobile User Equipment (ms), or the like, and may communicate with one or more core networks via a Radio Access Network (RAN, for example), and the Terminal device may be a Mobile Terminal, such as a Mobile phone (or a "cellular" phone) and a computer having the Mobile Terminal, such as a portable, pocket, handheld, computer-embedded or vehicle-mounted Mobile device, or an airborne device, such as an unmanned aerial vehicle, an aircraft, or the like, and may exchange language and/or data with the Radio Access Network.
The network device may be understood as a core network, or may also be understood as a Base Station, where the Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved Node B (eNB or e-NodeB) and a 5G Base Station (gNB) in LTE, and a network side device in a subsequent evolved communication system.
The high-frequency unlicensed frequency band described in this embodiment may be a 60GHz unlicensed frequency band, or may also be an unlicensed frequency band of other high-frequency bands, which is not specifically limited herein.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Fig. 1 is a flowchart illustrating a channel monitoring method according to an embodiment of the present invention, where the method is applied to a communication device, and the communication device may be the above-mentioned terminal device, the above-mentioned network device, or a Wireless-Fidelity Access Point (Wi-Fi AP), and the channel monitoring method is described as follows.
S102: when monitoring channels in a plurality of beam directions, monitoring the channels in the plurality of beam directions in sequence according to a preset rule.
In S102, before the communication device uses the high-frequency unlicensed spectrum to perform communication, the communication device may monitor channels in multiple beam directions of the high-frequency unlicensed spectrum in a directional LBT manner, and when monitoring the channels in the multiple beam directions, the communication device may monitor the channels in the multiple beam directions in sequence according to a preset rule. The listening sequence of the channels in the multiple beam directions may be a random sequence, or may be a predetermined sequence.
In a first implementation manner of this embodiment, when the communication device monitors channels in multiple beam directions in sequence according to a preset rule, the method may include:
when monitoring a first channel in a first beam direction, if the state of the first channel is occupied and a monitoring parameter of the first channel is greater than or equal to a preset threshold value, monitoring a second channel in a second beam direction. Wherein the first beam direction is one of the plurality of beam directions, and the second beam direction is another one of the plurality of beam directions different from the first beam direction.
Specifically, taking a first beam direction of the multiple beam directions as an example, when a channel (here, for convenience of distinction, may be represented by a first channel) in the first beam direction is monitored, it may be determined whether a state of the first channel is idle.
When judging whether the state of the first Channel is idle, the communication device may perform Clear Channel Assessment (CCA) in a power detection manner, and if it is detected that the received power of the communication device in a plurality of CCA slots is smaller than a power threshold, it may be determined that the state of the first Channel is idle; if it is detected that the received power of the communication device in one CCA slot is greater than or equal to the power threshold, it may be determined that the status of the first channel is non-idle, i.e., occupied.
It should be noted that, in the existing monitoring mechanism, the direction of the receiving beam of the communication device is usually an omni-directional beam direction (omni-directional pattern) or a quasi-omni antenna pattern, that is, the receiving beam of the communication device operates in the widest beam, and in this embodiment, the communication device monitors channels in multiple beam directions based on a directional LBT (directional beam pattern), so that when determining whether the channel state is idle, the power threshold needs to adjust the existing power according to the gain difference between the directional beam pattern and the omni-directional pattern or the quasi-omni antenna pattern, that is, the gain in one beam direction and the gain in the existing omni-directional or quasi-omni antenna direction in this embodiment need to be considered.
Specifically, assuming that the receiving antenna is a quasi-omni beam, the existing power threshold is known as: -47dBm + (40dBm-Pout (dBm)), where Pout is Effective Isotropic Radiated Power (EIRP), and the adjusted Power threshold can be expressed as: -47dBm + (40dBm-pout (dBm)) + Δ (dB), where Δ (dB) ═ Grx _ dir (dB) -Grx _ quasi-omni (dB), Grx _ dir (dB) is the receive antenna gain in the beam direction being listened to in this embodiment, and Grx _ quasi-omni (dB) is the receive antenna gain in the existing quasi-omni beam direction.
After obtaining the adjusted power threshold, it may be determined whether the state of the first channel is idle based on the adjusted power threshold.
In the following description of this embodiment, when determining whether the channel state in each beam direction is idle, the power threshold used may be a power threshold adjusted based on the above adjustment method, or may be a power threshold that is not adjusted.
After determining whether the state of the first channel is idle:
if the state of the first channel is occupied and a monitoring parameter when monitoring the first channel is greater than or equal to a preset threshold, it may be stated that the first channel is always in an occupied state within a time duration corresponding to the preset threshold, and at this time, a channel in a second beam direction (which may be represented by a second channel for convenience of distinction) may be selected to be monitored, where the second beam direction is one of the beam directions other than the first beam direction, and may be obtained by random selection or may be obtained by determination based on a certain sequence, the monitoring parameter may include at least one of a monitoring time duration and a number of CCA slots, and the preset threshold may be a predetermined threshold corresponding to the monitoring parameter, and may be determined specifically according to an actual situation, and is not specifically limited herein. The monitoring duration and the number of the CCA slots may be duration or the number of CCA slots during which the channel is continuously monitored or cumulatively monitored to be busy.
If the state of the first channel is idle, in an implementation manner, the communication device may immediately access the first channel, perform information transmission based on the first channel, and monitor a second channel in the second beam direction after the information transmission is finished; in another implementation, the communication device may also choose not to access the first channel immediately, but rather to listen to the second channel.
In this embodiment, since the communication device performs channel monitoring based on the directional LBT, the communication device may stop monitoring the first channel or delay monitoring the first channel when monitoring the second channel.
When the communication device listens to the second channel, the listening method may be the same as the above-described method for listening to the first channel, and a description thereof is not repeated here.
In this way, the above-described monitoring method for the first channel and the second channel can realize monitoring for channels in a plurality of beam directions.
In this embodiment, after monitoring channels in multiple beam directions, for a beam direction occupied by a channel therein, monitoring channels in these beam directions again may be performed; for the beam direction in which the channel is idle, when the communication device determines that the state of the channel in the beam direction is idle, and does not immediately access the channel, the communication device may monitor the channels in the multiple beam directions, and then perform information transmission in the beam direction in which the channel is idle, and then perform monitoring again on the channel in the beam direction in which the channel is occupied.
When the communication device performs information transmission in the beam direction in which the channels are idle, taking the idle channel as the first channel as an example, since the first channel is not immediately accessed when the first channel is determined to be idle, in order to ensure that the state of the first channel at this time is idle, CCA may be performed on the first channel again before transmission.
After CCA before transmission of the first channel, if the state of the first channel is idle, the communication device may perform information transmission based on the first channel; if the first channel is occupied, the communication device cannot transmit information based on the first channel, and at this time, other idle channels can be accessed again, and after information transmission is performed based on the other idle channels, the first channel is monitored again.
When the communication device listens again to the channel whose channel state is occupied, taking the first channel as an example, at least the following two ways may be included:
the first mode is as follows: and continuing to monitor the first channel based on the target counting value.
The target count value may be understood as an extended Clear Channel Assessment (eCCA) count value corresponding to delayed listening to the first Channel, and the count value may be a value randomly selected from 0 to 127 when the first Channel is last listened to, and may be represented by a counter.
That is, after the first channel is delayed to be monitored, when the first channel is monitored again, the LBT procedure during the last monitoring may be continued, that is, the eCAA is directly performed, and the counter value of the eCCA is the counter value recorded when the last monitoring is stopped or the first channel is delayed to be monitored.
Optionally, after monitoring the first channel again based on the counter value at the last monitoring, if the counter value becomes 0 or 1, the first channel may be accessed immediately, or the first channel may be accessed after monitoring all the channels occupied by the channel state again.
The second mode is as follows: and monitoring the first channel again.
Specifically, after stopping monitoring the first channel, when monitoring the first channel again, a new LBT procedure may be started without considering the previous LBT procedure. When listening to the first channel again based on the new LBT procedure, specific implementation manners may refer to the above-mentioned contents of listening to the first channel, and a description thereof is not repeated here.
For ease of understanding the first implementation of the present embodiment, reference may be made to fig. 2, 3 and 4.
In fig. 2, a rectangular block represents an Orthogonal Frequency Division Multiplexing (OFDM) symbol, t represents a time slot, which includes 14 OFDM symbols, the multiple beams to be monitored are beam 1, beam 2, and beam 3, the preset threshold is 5 CCA slots, each CCA slot is 5 microseconds, and then 5 CCA slots are 25 microseconds.
When monitoring the channel 1 in the beam 1 direction, if the state of the channel 1 is idle, the channel 1 can be accessed immediately, and information transmission is performed based on the channel 1, and after information transmission is performed based on the channel 1, the channel 2 in the beam 2 direction can be monitored. When monitoring the channel 2, if the number of CAA time slots occupied by the channel 2 exceeds 5, the channel 2 is monitored in a delayed manner, and the channel 3 in the beam 3 direction is monitored. When monitoring the channel 3, if the state of the channel 3 is idle, the channel 3 can be accessed immediately, and information transmission is performed based on the channel 3.
After information transmission is performed based on the channel 3, monitoring may be performed again on the channel 2, at this time, the previous LBT procedure may be continued, eCCA is directly performed, and the counter value of eCCA is the counter value of the delayed monitoring.
When listening again to channel 2, the counter value becomes 0, at which point channel 2 can be accessed immediately and information transmission is performed based on channel 2.
Up to this point, information transmission in the beam 1, beam 2 and beam 3 directions can be achieved.
In fig. 3, a rectangular block represents an OFDM symbol, t represents a slot, and includes 14 OFDM symbols, a plurality of beams to be monitored are beam 1, beam 2, and beam 3, a preset threshold is 5 CCA slots, and each CCA slot is 5 microseconds, and then 5 CCA slots are 25 microseconds.
When monitoring channel 1 in the beam 1 direction, if the state of channel 1 is idle, then channel 2 in the beam 2 direction can be monitored. When monitoring the channel 2, if the number of CAA time slots continuously monitoring that the channel 2 is busy exceeds 5, the channel 2 is delayed to be monitored, and the channel 3 in the beam 3 direction is monitored. While listening on channel 3, the status of channel 3 is idle.
After monitoring the channel 1, the channel 2, and the channel 3 in sequence, the channel 1 and the channel 3 in an idle state may be accessed, and when accessing the channel 1 and the channel 3, in order to ensure that the states of the channel 1 and the channel 3 are idle during transmission, CCA may be performed on the channel 1 and the channel 3 again before transmission.
In fig. 3, after CCA before transmission is performed on channel 1, the state of channel 1 is still idle, at this time, channel 1 may be accessed and information transmission may be performed based on channel 1, and after information transmission is completed, CCA before transmission may be performed on channel 3. After CCA is performed before transmission on the channel 3, the state of the channel 3 is also idle, and at this time, the channel 3 may be accessed and information transmission may be performed based on the channel 3.
After the information transmission based on channel 3, channel 2 may be listened to again. Listening to channel 2 again may be based on the previous LBT procedure. In fig. 3, after listening to channel 2 again, the state of channel 2 is idle, and at this time, channel 2 can be accessed immediately and information transmission is performed based on channel 2.
Up to this point, information transmission in the beam 1, beam 2 and beam 3 directions can be achieved.
In fig. 4, different from fig. 3, after the CCA before transmission on the channel 1 is performed, it is determined that the state of the channel 1 is idle, and information is transmitted based on the channel 1, and when the CCA before transmission on the channel 3 is performed, the state of the channel 3 is changed from idle to occupied, at this time, the channel 3 will not be accessed, and it is necessary to listen to the channel 3 again. When the channels in the beam directions, which are detected to be occupied by the channels, are monitored again, the channel 2 may be monitored first, and then the channel 3 may be monitored.
In fig. 4, after monitoring channel 2, the state of channel 2 is idle, and at this time, channel 3 may be monitored. While listening to channel 3, the status of channel 3 is also idle.
After listening on channel 2 and channel 3 again and determining that channel 2 and channel 3 are idle, channel 2 and channel 3 may be accessed, and before accessing channel 2 and channel 3, CCA may be performed again on channel 2 and channel 3, respectively, to ensure that the states of channel 2 and channel 3 are idle.
In fig. 4, after CCA before transmission on channel 2, the state of channel 2 is still idle, at this time, channel 2 may be accessed and information transmission may be performed based on channel 2, and after information transmission is completed, CCA may be performed on channel 3. After CCA is performed before transmission on the channel 3, the state of the channel 3 is also idle, and at this time, the channel 3 may be accessed and information transmission may be performed based on the channel 3.
Up to this point, information transmission in the beam 1, beam 2 and beam 3 directions can be achieved.
In a second implementation manner of this embodiment, when the communication device monitors channels in multiple beam directions in sequence according to a preset rule, the method may include:
when monitoring the channel in one beam direction, if the channel state is empty, monitoring the channels in the other directions.
Specifically, taking one of the beam directions as an example, the communication device may continuously monitor the Channel in the beam direction until the state of the Channel in the beam direction is idle, that is, an Initial Clear Channel Assessment (iCCA) detection Channel is empty, or a counter value of eCCA is 0 or 1, at this time, the Channel in the next beam direction may be monitored, and when the Channel in the next beam direction is monitored, the communication device may also continuously monitor the Channel in the other beam direction until the state of the Channel in the beam direction is idle, and … …, and so on, the monitoring of the channels in the multiple beam directions may be implemented.
That is, the communication device may perform a complete listening procedure on the channel in each beam direction until the listening of the channels in the multiple beam directions is completed.
It should be noted that, in the second implementation manner, the communication device may immediately access the channel in one beam direction when it is monitored that the channel is empty, or sequentially access the channels in the multiple beam directions after monitoring the channels in the multiple beam directions, that is, when the states of the channels in the multiple beam directions are all idle, which is not limited herein. The specific implementation manner can refer to the related contents described in the above first implementation manner, and the description is not repeated here.
In a third implementation manner of this embodiment, when the communication device monitors channels in multiple beam directions in sequence according to a preset rule, the continuous monitoring duration of the channel in each beam direction may be limited, and specifically, the continuous monitoring duration of the channel in each beam direction may be limited to be less than or equal to N × T, where N is an integer greater than or equal to 1, T is a CCA slot, and values of N and T may be determined according to an actual situation.
Thus, when monitoring a channel in one beam direction, when the continuous monitoring duration is less than or equal to N × T, monitoring in the beam direction may be suspended, and a channel in the next beam direction may be monitored, when monitoring a channel in the next beam direction, when the continuous monitoring duration is less than or equal to N × T, monitoring may be suspended, and monitoring channels in other beam directions may be monitored, … …, and so on, and monitoring of channels in a plurality of beam directions may be implemented. The continuous listening duration in each beam direction may be the same or different. After the channels in the multiple beam directions are monitored in sequence, polling monitoring may be performed on the channels in the multiple beam directions, where when polling monitoring is performed, a continuous monitoring duration of each channel may also be limited to be less than or equal to N × T, and for a channel in each beam direction, when monitoring the channel, monitoring may be performed based on a counter value of the extended CCA when monitoring of the channel is suspended last time.
It should be noted that, in the process of polling monitoring, when performing continuous monitoring for at most N × T duration on a channel in a beam direction, if the state of the channel in the beam direction is occupied, the counter value of the corresponding extended CAA remains unchanged, and if each extended CCA detects that the state of the channel in the beam direction is idle, the counter value of the corresponding extended CAA is decreased by one, and when the counter value decreases to 0 or 1, the polling monitoring on the channel in the beam direction may be stopped.
For example, the communication device may perform at most N CCA slots for channel 1 while listening to channel 1, channel 2, and channel 3 in the beam 1, beam 2, and beam 3 directions, may perform at most N CCA slots for channel 1 after pausing the listening to channel 1, may perform at most N CCA slots for channel 2, and may perform at most N CCA slots for channel 3 after pausing the listening to channel 2. After monitoring the channel 1, the channel 2 and the channel 3, the channel 1, the channel 2 and the channel 3 may be monitored in a polling manner, and the polling monitoring on one of the channels is stopped until the state of the channel is idle, that is, the counter value is 0 or 1.
It should be noted that, in the third implementation manner, the communication device may immediately access the channel when it is monitored that the channel in one beam direction is empty, or sequentially access the channels in the multiple beam directions when it is determined that the states of the multiple channels are idle after performing polling monitoring on the channels in the multiple beam directions, or sequentially access the idle channels when it is determined that the state of one or more of the channels is idle after performing polling monitoring on the channels in the multiple beam directions, and perform polling monitoring on the remaining non-idle channels after performing information transmission based on the idle channels, which is not specifically limited herein. The specific implementation manner can refer to the related contents described in the above first implementation manner, and the description is not repeated here.
According to the technical scheme provided by the embodiment of the invention, when the communication equipment monitors the channels in the plurality of beam directions, the communication equipment monitors the channels in the plurality of beam directions in sequence according to the preset rule. Therefore, before the communication equipment uses the high-frequency unlicensed frequency band for communication, when the directional LBT mode is adopted for monitoring the channels in the multiple beam directions under the unlicensed frequency spectrum, the channels in the multiple beam directions can be monitored in sequence according to the preset rule, and therefore an effective channel monitoring mode can be provided, the communication equipment can be effectively accessed into the channels of the high-frequency unlicensed frequency band, and information transmission under the high-frequency unlicensed frequency band is further achieved.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
Fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present invention, where the communication device includes: a listening module 51, wherein:
the monitoring module 51 monitors channels in multiple beam directions in sequence according to a preset rule when monitoring the channels in the multiple beam directions.
Optionally, the monitoring module 51, according to a preset rule, sequentially monitors the channels in the multiple beam directions, including:
when monitoring a first channel in a first beam direction, if the state of the first channel is occupied and a monitoring parameter of the first channel is greater than or equal to a preset threshold value, monitoring a second channel in a second beam direction;
the monitoring parameter includes at least one of a monitoring duration and a number of clear channel assessment CCA slots.
Optionally, when the monitoring module 51 monitors the second channel in the second beam direction, the method further includes:
stopping listening to the first channel; or, delaying listening to the first channel.
Optionally, the monitoring module 51 monitors the first channel again after monitoring the channels in the multiple beam directions.
Optionally, the monitoring module 51 monitors the first channel again, including:
continuing to monitor the first channel based on a target count value, wherein the target count value is an extended CCA count value corresponding to the first channel when the monitoring is stopped or delayed; or the like, or, alternatively,
and monitoring the first channel again.
Optionally, the communication device further comprises a communication module 52, wherein:
the communication module 52, when the monitoring module 51 determines that the state of the first channel is idle, immediately accesses the first channel.
Optionally, the communication module 52 accesses the first channel after the monitoring module 51 determines that the state of the first channel is idle and the monitoring module 51 monitors the channels in the multiple beam directions.
Optionally, the accessing, by the communication module 52, the first channel includes:
performing CCA on the first channel, and judging whether the state of the first channel is idle;
and if so, accessing the first channel.
Optionally, after performing CCA on the first channel and determining whether the state of the first channel is idle, if the state of the first channel is occupied, the communication module 52 accesses the idle channels in the multiple beam directions, and after performing transmission based on the idle channels, the monitoring module 51 monitors the first channel again.
Optionally, the monitoring module 51, according to a preset rule, sequentially monitors the channels in the multiple beam directions, including:
when monitoring the channel in one beam direction, if the channel state is empty, monitoring the channels in the other beam directions.
Optionally, the monitoring module 51 performs polling monitoring on the channels in the multiple beam directions after sequentially monitoring the channels in the multiple beam directions according to a preset rule, where a continuous monitoring duration of the channel in each beam direction is less than or equal to N × T, N is an integer greater than or equal to 1, and T is a CCA timeslot.
Optionally, the power threshold for channel monitoring is determined based on a difference between a gain of a receiving antenna in each of the plurality of beam directions and a gain of a receiving antenna in an omni-directional or quasi-omni-directional beam direction, where the power threshold is used to determine whether a state of a channel is idle.
The communication device provided in the embodiment of the present invention can implement each process implemented by the communication device in the method embodiment of fig. 1, and is not described herein again to avoid repetition. In the embodiment of the invention, when monitoring the channels in the multiple beam directions, the communication equipment monitors the channels in the multiple beam directions in sequence according to a preset rule. Therefore, before the communication equipment uses the high-frequency unlicensed frequency band for communication, when the directional LBT mode is adopted for monitoring the channels in the multiple beam directions under the unlicensed frequency spectrum, the channels in the multiple beam directions can be monitored in sequence according to the preset rule, and therefore an effective channel monitoring mode can be provided, the communication equipment can be effectively accessed into the channels of the high-frequency unlicensed frequency band, and information transmission under the high-frequency unlicensed frequency band is further achieved.
In the embodiment of the present invention, the communication device may be a network device or a terminal device. When the communication device is a terminal device, as shown in fig. 6, fig. 6 is a schematic structural diagram of the terminal device according to an embodiment of the present invention. The terminal device 600 shown in fig. 6 includes: at least one processor 601, memory 602, at least one network interface 604, and a user interface 603. The various components in the mobile terminal 600 are coupled together by a bus system 605. It is understood that the bus system 605 is used to enable communications among the components. The bus system 605 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 605 in fig. 6.
The user interface 603 may include, among other things, a display, a keyboard, a pointing device (e.g., a mouse, trackball), a touch pad, or a touch screen.
It will be appreciated that the memory 602 in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a Read-only memory (ROM), a programmable Read-only memory (PROM), an erasable programmable Read-only memory (EPROM), an electrically erasable programmable Read-only memory (EEPROM), or a flash memory. The volatile memory may be a Random Access Memory (RAM) which serves as an external cache. By way of illustration and not limitation, many forms of RAM are available, such as static random access memory (SRAM, staticiram), dynamic random access memory (DRAM, dynamic RAM), synchronous dynamic random access memory (SDRAM, syncronous DRAM), double data rate synchronous dynamic random access memory (DDRSDRAM, DoubleDataRate SDRAM), Enhanced synchronous dynamic random access memory (ESDRAM, Enhanced SDRAM), synchronous link dynamic random access memory (SLDRAM, synchlink DRAM), and direct memory bus random access memory (DRRAM, direcrambus SRAM). The memory 602 of the subject systems and methods is intended to comprise, without being limited to, these and any other suitable types of memory.
In some embodiments, memory 602 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 6021 and application programs 6022.
The operating system 6021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application program 6022 includes various application programs such as a media player (MediaPlayer), a Browser (Browser), and the like, and is used to implement various application services. A program implementing the method of an embodiment of the invention can be included in the application program 6022.
In this embodiment of the present invention, the terminal device 600 further includes: a computer program stored on a memory 602 and executable on a processor 601, the computer program when executed by the processor 601 performing the steps of:
when monitoring channels in a plurality of beam directions, monitoring the channels in the plurality of beam directions in sequence according to a preset rule.
Therefore, before the terminal device uses the high-frequency unlicensed frequency band for communication, when the directional LBT mode is adopted for monitoring the channels in the multiple beam directions under the unlicensed frequency spectrum, the channels in the multiple beam directions can be monitored in sequence according to the preset rule, and therefore an effective channel monitoring mode can be provided, the terminal device can be effectively accessed into the channels in the high-frequency unlicensed frequency band, and information transmission under the high-frequency unlicensed frequency band is further achieved.
The method disclosed by the above-mentioned embodiment of the present invention can be applied to the processor 601, or implemented by the processor 601. The processor 601 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 601. The processor 601 may be a general-purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may reside in ram, flash memory, rom, prom, or eprom, registers, among other computer-readable storage media known in the art. The computer readable storage medium is located in the memory 602, and the processor 601 reads the information in the memory 602 and performs the steps of the above method in combination with the hardware thereof. In particular, the computer readable storage medium has stored thereon a computer program, which when executed by the processor 601, implements the steps of the embodiments of the channel listening method as described above.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described in this disclosure may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in this disclosure. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
The terminal device 600 can implement each process implemented by the communication device in the foregoing embodiments, and is not described here again to avoid repetition.
Embodiments of the present invention also provide a computer-readable storage medium storing one or more programs, where the one or more programs include instructions, which when executed by a communication device including a plurality of application programs, enable the communication device to perform the method of the embodiment shown in fig. 1, and are specifically configured to perform the steps of the above-mentioned channel monitoring method.
When the communication device is a network device, as shown in fig. 7, fig. 7 is a schematic structural diagram of the network device according to the embodiment of the present invention, and a schematic structural diagram of a physical apparatus of the network device 700 may be as shown in fig. 7, and includes a processor 702, a memory 703, a transmitter 701, and a receiver 704. In particular applications, transmitter 701 and receiver 704 may be coupled to an antenna 705.
The memory 703 is used for storing programs. In particular, the program may include program code comprising computer operating instructions. Memory 703 may include both read-only memory and random-access memory, and provides instructions and data to processor 702. The memory 703 may comprise high-speed RAM memory, and may also include non-volatile memory (e.g., at least 1 disk memory).
The processor 702 executes the program stored in the memory 703.
Specifically, in network device 700, processor 702 may perform the following method:
when monitoring channels in a plurality of beam directions, monitoring the channels in the plurality of beam directions in sequence according to a preset rule.
Therefore, before the network device uses the high-frequency unlicensed frequency band for communication, when the directional LBT mode is adopted for monitoring the channels in the multiple beam directions under the unlicensed frequency spectrum, the channels in the multiple beam directions can be monitored in sequence according to the preset rule, so that an effective channel monitoring mode can be provided, the network device can be effectively accessed to the channels in the high-frequency unlicensed frequency band, and information transmission under the high-frequency unlicensed frequency band is further realized.
The method performed by the network device 700 according to the embodiment of the invention shown in fig. 2 may be implemented in the processor 702 or implemented by the processor 702. The processor 702 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 702. The Processor 702 may be a general-purpose Processor including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 703, and the processor 702 reads the information in the memory 703 and performs the steps of the above method in combination with the hardware thereof.
The network device may also execute the method shown in fig. 1 and implement the functions of the network device in the embodiment shown in fig. 1, which is not described herein again in the embodiments of the present invention.
Embodiments of the present invention also provide a computer-readable storage medium storing one or more programs, where the one or more programs include instructions, which when executed by a communication device including a plurality of application programs, enable the communication device to perform the method of the embodiment shown in fig. 1, and are specifically configured to perform the steps of the above-mentioned channel monitoring method.
In short, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions. One typical implementation device is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (14)

1. A method for channel sensing, comprising:
when monitoring channels in a plurality of beam directions, monitoring the channels in the plurality of beam directions in sequence according to a preset rule;
according to a preset rule, monitoring the channels in the multiple beam directions in sequence, including:
when monitoring a first channel in a first beam direction, if the state of the first channel is occupied and a monitoring parameter of the first channel is greater than or equal to a preset threshold value, monitoring a second channel in a second beam direction;
the monitoring parameter includes at least one of a monitoring duration and a number of clear channel assessment CCA slots.
2. The method of claim 1, wherein while listening for a second channel in a second beam direction, the method further comprises:
stopping listening to the first channel; or, delaying listening to the first channel.
3. The method of claim 2, wherein the method further comprises:
and after monitoring the channels in the multiple beam directions, monitoring the first channel again.
4. The method of claim 3, wherein listening again to the first channel comprises:
continuing to monitor the first channel based on a target count value, wherein the target count value is an extended CCA count value corresponding to the time of delaying monitoring of the first channel; or the like, or, alternatively,
and monitoring the first channel again.
5. The method of claim 1, wherein the method further comprises:
and if the state of the first channel is idle, immediately accessing the first channel.
6. The method of claim 1, wherein the method further comprises:
and if the state of the first channel is idle, accessing the first channel after monitoring the channels in the multiple beam directions.
7. The method of claim 6, wherein accessing the first channel comprises:
performing CCA on the first channel, and judging whether the state of the first channel is idle;
and if so, accessing the first channel.
8. The method of claim 7, wherein after performing CCA on the first channel and determining whether the status of the first channel is idle, further comprising:
and if the state of the first channel is occupied, accessing idle channels in the multiple beam directions, and monitoring the first channel again after transmitting based on the idle channels.
9. The method of claim 1, wherein sequentially monitoring the channels in the plurality of beam directions according to a preset rule comprises:
when monitoring the channel in one beam direction, if the channel state is empty, monitoring the channels in the other beam directions.
10. The method of claim 1, wherein after sequentially monitoring the channels in the plurality of beam directions according to a preset rule, the method further comprises:
and performing polling monitoring on the channels in the multiple beam directions, wherein the continuous monitoring duration of the channel in each beam direction is less than or equal to N x T, N is an integer greater than or equal to 1, and T is a CCA time slot.
11. The method of claim 1,
the power threshold for channel monitoring is determined based on a difference between the gain of the receiving antenna in each of the plurality of beam directions and the gain of the receiving antenna in the omni-directional or quasi-omni-directional beam direction, wherein the power threshold is used for determining whether the channel state is idle.
12. A communication device, comprising:
the monitoring module is used for sequentially monitoring the channels in the plurality of beam directions according to a preset rule when monitoring the channels in the plurality of beam directions;
the monitoring module monitors the channels in the multiple beam directions in sequence according to a preset rule, and the monitoring module comprises:
when monitoring a first channel in a first beam direction, if the state of the first channel is occupied and a monitoring parameter of the first channel is greater than or equal to a preset threshold value, monitoring a second channel in a second beam direction;
the monitoring parameter includes at least one of a monitoring duration and a number of clear channel assessment CCA slots.
13. A communication device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method according to any one of claims 1 to 11.
14. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 11.
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