CN107919929B - Channel detection method and device based on wave beams - Google Patents
Channel detection method and device based on wave beams Download PDFInfo
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- CN107919929B CN107919929B CN201711170186.5A CN201711170186A CN107919929B CN 107919929 B CN107919929 B CN 107919929B CN 201711170186 A CN201711170186 A CN 201711170186A CN 107919929 B CN107919929 B CN 107919929B
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Abstract
The embodiment of the application discloses a method and equipment for detecting a channel based on a beam, which are used for improving the detection efficiency of the channel based on the beam and improving the use efficiency of an unauthorized frequency spectrum. The method in the embodiment of the application comprises the following steps: when the device needs to occupy the channel where the frequency spectrum is located to transmit data, the device determines a main beam and performs a complete channel detection process on the main beam, and when the device determines that the channel where the frequency spectrum is located can be occupied in the direction of the main beam, for channel detection in other beam directions, simplified channel detection processes with fewer detection steps relative to the complete channel detection process are adopted, so that the overall channel detection steps are reduced, and the channel detection efficiency is improved.
Description
Technical Field
The present application relates to the field of communications, and in particular, to a method and an apparatus for channel detection based on beams.
Background
As the mobile internet enters a new growth phase, more mobile terminals are connected to each other and share more abundant data, and operators face a challenge of thousands of times of mobile data traffic. For this reason, a combined approach is needed to increase the capacity of a mobile communication system from different perspectives, including the use of more frequency spectrum, more efficient use of existing frequency spectrum, and deployment of more small base stations. From the earliest analog cellular communication to the second generation GSM/IS-95, the third generation WCDMA/CDMA2000/TD-SCDMA and the latest LTE 4G technology, the spectrum efficiency has been greatly improved, for example, the downlink rate of the LTE FDD network reaches 150Mbps under the conditions of 20MHz bandwidth and 2X2 MIMO. In addition, 3GPP also studies and proposes a heterogeneous network architecture, and a large number of home base stations are deployed in the coverage area of a macro cell to improve the system capacity and meet the rapidly increasing traffic demand. However, it is difficult to fully cope with the thousands of times of increased traffic challenges only by improving the spectrum efficiency and deploying more small base stations, and therefore, the deployment of LTE on unlicensed spectrum is also one direction of the development of future mobile communication.
LTE-U (LTE Advanced in Unlicensed Spectrum, LTE) is an LTE network deployed over Unlicensed Spectrum. The use of wireless electromagnetic waves has strict rules internationally, different frequency spectrums are divided for various networks such as GSM, LTE, digital trunking, broadcast television and the like, each country divides respective frequency spectrums for operators in the country according to the self condition and the international trend, the frequency spectrums are called authorized frequency spectrums, and the rest frequency spectrums which are not utilized or are not authorized to be shared are unauthorized frequency spectrums.
The LTE-U technology aggregates LTE frequency spectrum resources on an authorized frequency band and an unauthorized frequency band by deploying a new small base station and a carrier aggregation mode, and improves system capacity. LAA (Licensed Assisted Access) technology is an implementation of LTE-U. Under the condition of traditional LTE-assisted access, the unlicensed spectrum uses an LTE mechanism, and its transmissions are all omni-directional transmissions, and correspondingly, channel detections before channel access are all omni-directional channel detections. In NR (New Radio, New Radio technology), the frequency point of the unlicensed spectrum is high, and beam-based transmission and reception are used to increase the coverage. And the direction of each beam is different, so that the channel use condition of each beam is different. Therefore, a beam-based channel detection mode can be adopted, and the channel detection process of each beam is completely and independently carried out.
However, in practical application, the channel detection process in each beam direction is complex, the channel detection time is long, and the use efficiency of the unlicensed spectrum is greatly reduced.
Disclosure of Invention
The embodiment of the application provides a method and equipment for detecting a channel based on a beam, which are used for improving the channel detection efficiency based on the beam and improving the use efficiency of an unauthorized spectrum.
A first aspect of the embodiments of the present application provides a method for channel detection based on beams, including:
when equipment needs to occupy a channel where a frequency spectrum is located to transmit data, the equipment determines a main beam;
the device determines whether a channel where the frequency spectrum is located can be occupied or not in a main beam direction by adopting a complete channel detection process in the main beam direction;
and after determining that the channel where the frequency spectrum is located in the main beam direction can be occupied, adopting a simplified channel detection process in other beam directions to determine whether the channel where the frequency spectrum is located in the other beam directions can be occupied, wherein the detection steps in the simplified channel detection process are less than those in the complete channel detection process.
With reference to the first aspect of the embodiment of the present application, in a first implementation manner of the first aspect of the embodiment of the present application, the determining whether a channel where the spectrum is located in the other beam direction may be occupied by using a simplified channel detection process in the other beam direction specifically includes:
and if the channel where the frequency spectrum is located in the other beam directions is detected to be idle in the first detection granularity, determining that the channel where the frequency spectrum is located in the other beam directions can be occupied.
With reference to the first aspect of the embodiment of the present application, in a second implementation manner of the first aspect of the embodiment of the present application, the method further includes:
and when the channel where the frequency spectrum is located in the main beam direction is not detected to be available within a first preset time length, the equipment adopts the complete channel detection process in the other beam directions to determine whether the channel where the frequency spectrum is located in the other beam directions is available.
With reference to any one implementation manner of the first aspect of the present application to the second implementation manner of the first aspect, in a third implementation manner of the first aspect of the present application, before the step of adopting the simplified channel detection process in the other beam directions, the method further includes:
when the channel where the frequency spectrum is located in the main beam direction is determined to be occupied, determining whether data needs to be sent in the channel where the frequency spectrum is located in the main beam direction;
when determining that the channel where the frequency spectrum is located in the main beam direction has data to be sent, sending the data in the maximum channel occupation time of the channel where the frequency spectrum is located in the main beam direction;
and when it is determined that no data needs to be transmitted in the channel where the spectrum is located in the main beam direction, triggering the step of adopting a simplified channel detection process in the other beam directions.
With reference to the third implementation manner of the first aspect of the embodiment of the present application, in a fourth implementation manner of the first aspect of the embodiment of the present application, when it is determined that there is data to be transmitted on a channel where the spectrum is located in the main beam direction, after the step of transmitting the data within a maximum channel occupation time of the channel where the spectrum is located in the main beam direction, the method further includes:
if the data to be transmitted on the channel where the frequency spectrum is located in the main beam direction is not completely transmitted, triggering the device to adopt a complete channel detection process in the main beam direction, and determining whether the channel where the frequency spectrum is located in the main beam direction can be occupied;
or, if the data to be transmitted on the channel where the frequency spectrum is located in the main beam direction is not completely transmitted, triggering the device to adopt a simplified channel detection process in other beam directions, and determining whether the channel where the frequency spectrum is located in the other beam directions can be occupied.
A second aspect of embodiments of the present application provides an apparatus, including:
the main beam determining module is used for determining a main beam when a channel where a frequency spectrum is required to be occupied is used for transmitting data;
a first complete detection module, configured to determine whether a channel where the frequency spectrum is located in a main beam direction can be occupied by using a complete channel detection process in the main beam direction;
and a simplified detection module, configured to, after the first complete detection module determines that the channel where the frequency spectrum is located in the main beam direction can be occupied, determine whether the channel where the frequency spectrum is located in the other beam directions can be occupied by using a simplified channel detection process in the other beam directions, where a detection step in the simplified channel detection process is less than a detection step in the complete channel detection process.
With reference to the second aspect of the embodiment of the present application, in a first implementation manner of the second aspect of the embodiment of the present application, the simplified detection module is specifically configured to, after the first complete detection module determines that the channel where the spectrum is located in the main beam direction may be occupied, determine that the channel where the spectrum is located in the other beam directions may be occupied when the first detection granularity detects that the channel where the spectrum is located in the other beam directions is idle.
With reference to the second aspect of the embodiment of the present application, in a second implementation manner of the second aspect of the embodiment of the present application, the apparatus further includes:
a second complete detection module, configured to, when the first complete detection module does not detect that the channel where the frequency spectrum is located in the main beam direction is available within a first preset time, determine whether the channel where the frequency spectrum is located in the other beam directions is available by using the complete channel detection process in the other beam directions.
With reference to the second aspect of the embodiment of the present application to any one implementation manner of the second aspect, in a third implementation manner of the second aspect of the embodiment of the present application, the apparatus further includes:
a data determining module, configured to determine whether there is data to be sent in a channel where the frequency spectrum is located in the main beam direction after the first integrity detecting module determines that the channel where the frequency spectrum is located in the main beam direction may be occupied;
a data sending module, configured to send data in a maximum channel occupation time of a channel where the frequency spectrum is located in the main beam direction when the data determining module determines that the channel where the frequency spectrum is located in the main beam direction has data to send;
a first triggering module, configured to trigger the simplified detection module when the data determination module determines that no data needs to be sent in a channel where the spectrum is located in the main beam direction.
With reference to the third implementation manner of the second aspect of the embodiment of the present application, in a fourth implementation manner of the second aspect of the embodiment of the present application, the apparatus further includes:
and the second triggering module is used for triggering the first complete detection module or the simplified detection module when the data to be transmitted by the channel where the frequency spectrum is located in the main beam direction is not completely transmitted after the data transmission module is executed.
According to the technical scheme, the embodiment of the application has the following advantages: in the embodiment of the application, when the device needs to occupy the channel where the frequency spectrum is located to transmit data, the device determines a main beam and performs a complete channel detection process on the main beam, and when it is determined that the channel where the frequency spectrum is located in the main beam direction can be occupied, for channel detection in other beam directions, simplified channel detection processes with fewer detection steps relative to the complete channel detection process are adopted, so that the overall channel detection steps are reduced, the channel detection efficiency is improved, and the use efficiency of the unlicensed frequency spectrum is improved.
Drawings
Fig. 1 is a schematic flow chart of a beam-based channel detection method according to an embodiment of the present application;
fig. 2 is another schematic flow chart of a beam-based channel detection method according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of an apparatus according to an embodiment of the present application;
FIG. 4 is another schematic structural diagram of an apparatus according to an embodiment of the present application;
fig. 5 is another schematic structural diagram of the apparatus in the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.
The beam-based channel detection means that the device uses a receiver based on the beam direction to detect the energy on the channel where the spectrum is located, and if it is detected that the channel where the spectrum is located in the beam direction is available, it means that the device can transmit in the beam direction of the channel where the spectrum is located. That is, the beam receiving direction corresponds to the beam transmitting direction, and it is detected that the channel where the frequency spectrum is located can be occupied in a certain beam receiving direction, which means that only the beam transmitting direction corresponding to the channel where the frequency spectrum is located can be used for transmitting. Thus, a complete channel detection procedure can be performed for each beam direction, for example, a channel detection procedure is as follows:
and detecting a channel in the beam direction of the first beam according to a second detection granularity and a third detection granularity, wherein the second detection granularity is larger than the third detection granularity, the second detection granularity is 16us + M in the LAA, the third detection granularity is 9us, and M has different values according to different channel detection priorities.
The detection process specifically comprises the following steps:
if the channel in the beam direction of the first beam is detected to be idle for the first time at the second detection granularity (the channel idle indicates that the energy of the channel in which the frequency spectrum received by the receiver based on the beam direction is located by the device is lower than a threshold value, which can be set based on the channel in which the frequency spectrum is located in the beam direction), selecting a random value N in a first contention window, and performing channel detection with the third detection granularity as the detection granularity, wherein the contention window value q is also different because of different channel detection priorities, and N is randomly selected from 0 to q;
if the channel in the beam direction of the first beam is idle and the value of the random number is not 0, the value of the random number is reduced by 1, and the channel detection is continuously carried out by taking the third detection granularity as the detection granularity;
if the channel in the beam direction of the first beam is busy in the third detection granularity, performing channel detection again by taking the second detection granularity as the detection granularity;
and if the channel in the beam direction of the first beam is detected to be idle again at the second detection granularity and the value of the random number is not 0, subtracting 1 from the value of the random number, and resuming the channel detection with the third detection granularity as the detection granularity.
When the random number N is reduced to 0, it indicates that the channel is available, i.e. the transmission can be performed on the channel and the occupation duration cannot exceed the maximum channel occupation time. And the maximum channel occupation time is determined according to the used channel detection priority. Wherein, different channel detection priorities correspond to different M values, q values and channel occupation time.
Therefore, the channel detection process in each beam direction is complex, the channel detection time is long, and the use efficiency of the unlicensed spectrum is greatly reduced.
In the embodiment of the present application, a beam-based channel detection method is provided, where when a channel where a spectrum is located is used in NR, and channel detection and access are performed based on beams, one main beam may be selected first to perform a complete channel detection process, and other beams only need to perform relatively loose channel detection, so that the beam-based channel detection efficiency is improved, and the use efficiency of an unlicensed spectrum is improved.
For convenience of understanding, the following describes a beam-based channel detection method in the embodiment of the present application in detail:
referring to fig. 1, an embodiment of a beam-based channel detection method in the embodiment of the present application includes:
101. when equipment needs to occupy a channel where a frequency spectrum is located to transmit data, the equipment determines a main beam;
it is to be understood that, in practical applications, the device may be a base station or a terminal.
When the device is a base station, the main beam can be determined by the base station according to a first preset rule;
when the device is a terminal, the main beam may be determined by the terminal according to a second preset rule, or main beam selection information sent by the base station may be received, where the main beam selection information includes information of the determined main beam.
The first preset rule and the second preset rule can have a plurality of different modes according to different actual conditions: for example, a beam with a high probability of channel occupation may be preferentially selected as the main beam according to the channel detection record of the previous period; or the selection may be made according to the data that needs to be transmitted on the beam, and which beam needs to be transmitted on which beam to use the channel detection mechanism has a higher priority, then which beam is selected as the main beam. And the priority of the channel detection mechanism determines the value M, the value q and the maximum channel occupation time. The higher the priority, the smaller the value of M, the value of q, and the maximum channel occupancy time, but the easier it is to detect that the channel is in an occupiable state. In addition, there may be many other main beam selection rules, which are not limited herein.
Since the main beam is selected in a radial state, the conversion time after the main beam is selected cannot be less than 1 second if the main beam needs to be converted. Since if a device frequently changes the main beam, the device can easily seize the channel, so that other devices cannot seize the channel, and unfairness is caused. The selected main beam may be a beam currently having data to be transmitted, or may be a beam having no data to be transmitted, which is not limited herein. Whether there is a beam finger for data transmission: for example, if the base station has data to transmit to one or more user equipments, the base station needs to schedule the user equipments, and the result of the scheduling includes determining which transmission beam is used by each user to transmit the data of the user. If a certain transmission beam is scheduled to transmit data of a certain user equipment, the beam is a beam with data to be transmitted, otherwise, the beam is a beam without data to be transmitted. The main beam may be a beam direction covering a smaller angular direction, for example covering one of the 30 degree directions; in a special case, the main beam may also be an omni-directional antenna, which is not limited herein.
The data in this step includes all the transmitted contents, and the downlink part is, for example: a synchronization Signal, a broadcast Signal, a paging Signal, various Reference signals (CSI-RS)), a Demodulation Reference Signal (DMRS), a DRS), a Physical Downlink Control Channel (PDCCH)/Enhanced Physical Downlink Control Channel (Epdcch), a Physical Downlink Shared Channel (PDSCH), and the like; the uplink part is, for example: physical Uplink Control Channel (PUCCH), Physical Uplink Shared Channel (PUSCH), srs (sounding Reference Signal), Demodulation Reference Signal (DMRS), sr (scheduling request), Physical Random Access Channel (PRACH), or other newly defined transmission Signal.
The spectrum in the channel where the spectrum is located may be the entire spectrum Bandwidth of the carrier where the cell is located, or may be a certain Bandwidth Part after the entire spectrum Bandwidth of the carrier where the cell is located is divided into a plurality of Bandwidth parts (BWPs) for the user equipment.
102. The device determines whether a channel where the frequency spectrum is located can be occupied or not in a main beam direction by adopting a complete channel detection process in the main beam direction;
the complete channel detection process is described above and will not be described herein.
103. And after determining that the channel where the frequency spectrum is located in the main beam direction can be occupied, adopting a simplified channel detection process in other beam directions to determine whether the channel where the frequency spectrum is located in the other beam directions can be occupied, wherein the detection steps in the simplified channel detection process are less than those in the complete channel detection process.
In this step, a simplified channel detection procedure is employed in other beam directions, the detection steps of which are less than the complete channel detection procedure used for the main beam. The specific simplified channel detection process can have multiple situations according to different requirements and actual situations:
for example, it may be: if the channel where the spectrum is located in the other beam direction is detected to be idle at the first detection granularity, it is determined that the channel where the spectrum is located in the other beam direction may be occupied, where the first detection granularity may be a value of the second detection granularity when M is equal to 1, that is, the first detection granularity is 25 us.
The following steps can be also included: if the channel where the frequency spectrum is located in the other wave beam direction is idle in the first detection granularity, carrying out channel detection by taking the third detection granularity as the detection granularity; and if the channel where the frequency spectrum is located in the other beam direction is detected to be idle in the third detection granularity, determining that the channel where the frequency spectrum is located in the other beam direction can be occupied.
It can be understood that there may be many other simplified channel detection processes according to the actual situation and the preset, and only the detection steps need to be less than the detection steps of the above-mentioned complete channel detection process, which is not limited herein. Because the simplified channel detection process is adopted, the detection steps are less than those of the complete channel detection process, so that the time length of the channel detection process using the simplified channel detection process is shorter, and the channel is more likely to be preempted preferentially.
In the embodiment of the application, when the device needs to occupy the channel where the frequency spectrum is located to transmit data, the device determines a main beam and performs a complete channel detection process on the main beam, and when it is determined that the channel where the frequency spectrum is located in the main beam direction can be occupied, for channel detection in other beam directions, simplified channel detection processes with fewer detection steps relative to the complete channel detection process are adopted, so that the overall channel detection steps are reduced, the channel detection efficiency is improved, and the use efficiency of the unlicensed frequency spectrum is improved.
In the above embodiment, after detecting that the channel where the frequency spectrum is located in the main beam direction can be occupied by using the complete channel detection process, whether the channel where the frequency spectrum is located in the other beam directions can be occupied by using the simplified channel detection process may be detected, and in practical application, after detecting that the channel where the frequency spectrum is located in the main beam direction can be occupied, data transmission may be performed on the channel where the frequency spectrum is located in the main beam direction. Referring to fig. 2, another embodiment of the method for beam-based channel detection in the embodiment of the present application includes:
201. when equipment needs to occupy a channel where a frequency spectrum is located to transmit data, the equipment determines a main beam;
202. the device determines whether a channel where the frequency spectrum is located in the main beam direction can be occupied or not by adopting a complete channel detection process in the main beam direction;
203. When the channel where the frequency spectrum is located in the main beam direction is determined to be occupied, determining whether data needs to be sent in the channel where the frequency spectrum is located in the main beam direction;
when determining that there is data to be transmitted in the channel where the spectrum is located in the main beam direction, triggering step 204;
when it is determined that no data needs to be transmitted in the channel in which the spectrum is located in the main beam direction, step 205 is triggered.
204. Transmitting data in the main beam direction within the maximum channel occupation time of the channel where the frequency spectrum is located;
when determining that the channel where the frequency spectrum is located in the main beam direction has data to be transmitted, the device transmits the data within the maximum channel occupation time of the channel where the frequency spectrum is located in the main beam direction.
Step 205 may be triggered after transmitting data within the maximum channel occupancy time of the channel in which the spectrum is located in the main beam direction.
It should be noted that, after the maximum channel occupation time is over, data that needs to be sent in the channel where the frequency spectrum is located in the main beam direction may not have been sent yet, that is, data needs to be sent in the channel where the frequency spectrum is located in the main beam direction, at this time, according to a difference of preset rules, there may be two processing manners:
in the method 1, if the data to be transmitted on the channel where the frequency spectrum is located in the main beam direction is not completely transmitted, the step 202 is triggered again, and the channel detection is performed again in the main beam direction.
In the method 2, even if the data to be transmitted on the channel where the spectrum is located in the main beam direction is not completely transmitted, step 205 is directly triggered.
205. Adopting a simplified channel detection process in other beam directions to determine whether a channel where the frequency spectrum is located in the other beam directions can be occupied, wherein the detection steps of the simplified channel detection process are less than those of a complete channel detection process;
when it is determined that no data needs to be transmitted on the channel where the frequency spectrum is located in the main beam direction, or data is transmitted within the maximum channel occupation time of the channel where the frequency spectrum is located in the main beam direction, the device determines whether the channel where the frequency spectrum is located in the other beam directions can be occupied or not by adopting a simplified channel detection process in the other beam directions.
It can be understood that, the device may sequentially detect the channels where the frequency spectrums are located in each of the other beam directions according to a preset sequence rule, and if it is determined that the channel where the frequency spectrums are located in a certain other beam direction may be occupied, may send data in the channel where the frequency spectrums are located in the beam direction.
206. When the channel where the frequency spectrum is located in the main beam direction is not detected to be available within the first preset time length, the device adopts the complete channel detection process in other beam directions to determine whether the channel where the frequency spectrum is located in the other beam directions is available.
A first preset time duration may be preset as a time limit, and if it is not detected that the channel where the spectrum is located in the main beam direction may be occupied within the first preset time duration, the device may adopt the complete channel detection process in other beam directions to determine whether the channel where the spectrum is located in the other beam directions may be occupied.
It should be noted that, since the main beam cannot be transformed within 1s, the main beam is selected mainly to detect that the channel where the spectrum is located can be occupied in the main beam direction, and a simplified channel detection process can be used in other beam directions. In this step, since it is not detected that the channel where the spectrum is located in the main beam direction can be occupied, a complete channel detection process must be used in all other beam directions.
In the embodiment of the application, the device can use the channel where the frequency spectrum is located in the main beam direction which is detected as occupiable to transmit data, so that the use efficiency of the frequency spectrum is improved. When the channel where the frequency spectrum is located in the main beam direction is detected to be available, a simplified channel detection process is adopted for other beam directions, and when the channel where the frequency spectrum is located in the main beam direction is not detected to be available in the first preset time period, a complete channel detection process is adopted for other beam directions, so that the channel detection efficiency is improved, and the accuracy of channel detection under some special conditions is ensured.
The following describes the apparatus in the embodiments of the present application:
referring to fig. 3, an embodiment of an apparatus in an embodiment of the present application includes:
a main beam determining module 301, configured to determine a main beam when a channel where a frequency spectrum is located needs to be occupied for data transmission;
a first integrity detection module 302, configured to determine whether a channel where the frequency spectrum is located in a main beam direction can be occupied by using an integrity channel detection process in the main beam direction;
a simplified detection module 303, configured to, after the first complete detection module 302 determines that the channel where the frequency spectrum is located in the main beam direction may be occupied, determine whether the channel where the frequency spectrum is located in the other beam directions may be occupied by using a simplified channel detection process in the other beam directions, where a detection step in the simplified channel detection process is less than a detection step in the complete channel detection process.
Preferably, as another embodiment of the device in this embodiment, the simplified detection module 303 may be specifically configured to, after the first complete detection module 302 determines that the channel where the frequency spectrum is located in the main beam direction is occupiable, determine that the channel where the frequency spectrum is located in the other beam directions is occupiable when detecting that the channel where the frequency spectrum is located in the other beam directions is idle at a first detection granularity.
Preferably, as another embodiment of the device in the embodiment of the present application, the device may further include:
a second integrity detection module 304, configured to, when the first integrity detection module 302 does not detect that the channel where the frequency spectrum is located in the main beam direction is available within a first preset time period, determine whether the channel where the frequency spectrum is located in the other beam directions is available by using the integrity channel detection process in the other beam directions.
In this embodiment of the present application, when a device needs to occupy a channel where a frequency spectrum is located to transmit data, the main beam determining module 301 determines a main beam, the first complete detecting module 302 performs a complete channel detecting process on the main beam, and when it is determined that the channel where the frequency spectrum is located in the main beam direction can be occupied, for channel detection in other beam directions, the simplified detecting module 303 adopts a simplified channel detecting process with fewer detecting steps relative to the complete channel detecting process, so that the overall channel detecting steps are reduced, thereby improving the channel detecting efficiency and improving the use efficiency of an unlicensed frequency spectrum.
Preferably, referring to fig. 4, as another embodiment of the device in the embodiment of the present application, in combination with the device in the embodiment shown in fig. 3, the device may further include:
a data determining module 401, configured to determine, after the first integrity detecting module 302 determines that the channel where the frequency spectrum is located in the main beam direction may be occupied, whether data needs to be sent in the channel where the frequency spectrum is located in the main beam direction;
a data sending module 402, configured to send data within a maximum channel occupation time of a channel where the frequency spectrum is located in the main beam direction when the data determining module 401 determines that the channel where the frequency spectrum is located in the main beam direction has data to send;
a first triggering module 403, configured to trigger the simplified detection module 303 when the data determination module 401 determines that no data needs to be sent in a channel where the spectrum is located in the main beam direction;
preferably, as another embodiment of the device in the embodiment of the present application, the device may further include:
a second triggering module 404, configured to trigger the first complete detecting module 302 or the simplified detecting module 303 after the data sending module 402 is executed and when data to be sent on a channel where the frequency spectrum is located in the main beam direction is not yet sent.
In this embodiment, the data sending module 402 may send data using the channel where the spectrum is located in the main beam direction detected as being occupiable, so as to improve the utilization efficiency of the unlicensed spectrum.
In the above, the apparatus in the embodiment of the present invention is described from the perspective of a unitized functional entity, and in the following, the apparatus in the embodiment of the present invention is described from the perspective of hardware processing, referring to fig. 5, another embodiment of the apparatus 500 in the embodiment of the present invention includes:
an input device 501, an output device 502, a processor 503, and a memory 504 (wherein the number of processors 503 in the apparatus 500 may be one or more, and one processor 503 is taken as an example in fig. 5). In some embodiments of the present invention, the input device 501, the output device 502, the processor 503 and the memory 504 may be connected by a bus or other means, wherein the connection by the bus is exemplified in fig. 5.
Wherein, by calling the operation instruction stored in the memory 504, the processor 503 is configured to perform the following steps:
when a channel where a frequency spectrum is needed to be occupied is used for data transmission, a main beam is determined;
determining whether a channel where the frequency spectrum is located in a main beam direction can be occupied or not by adopting a complete channel detection process in the main beam direction;
and after determining that the channel where the frequency spectrum is located in the main beam direction can be occupied, adopting a simplified channel detection process in other beam directions to determine whether the channel where the frequency spectrum is located in the other beam directions can be occupied, wherein the detection steps in the simplified channel detection process are less than those in the complete channel detection process.
In some embodiments of the present application, when the processor 503 executes the step of determining whether the channel where the spectrum is located in the other beam direction can be occupied by using the simplified channel detection process in the other beam direction, the following steps are specifically executed:
and if the channel where the frequency spectrum is located in the other beam directions is detected to be idle in the first detection granularity, determining that the channel where the frequency spectrum is located in the other beam directions can be occupied.
In some embodiments of the present application, the processor 503 is further configured to perform the following steps:
and when the channel where the frequency spectrum is located in the main beam direction is not detected to be available within a first preset time length, adopting the complete channel detection process in the other beam directions to determine whether the channel where the frequency spectrum is located in the other beam directions is available.
In some embodiments of the present application, before the step of employing the simplified channel detection procedure in the other beam direction, the processor 503 is further configured to perform the following steps:
when the channel where the frequency spectrum is located in the main beam direction is determined to be occupied, determining whether data needs to be sent in the channel where the frequency spectrum is located in the main beam direction;
when determining that the channel where the frequency spectrum is located in the main beam direction has data to be sent, sending the data in the maximum channel occupation time of the channel where the frequency spectrum is located in the main beam direction;
and when it is determined that no data needs to be transmitted in the channel where the spectrum is located in the main beam direction, triggering the step of adopting a simplified channel detection process in the other beam directions.
In some embodiments of the present application, after the step of determining that there is data to be transmitted on the channel where the spectrum is located in the main beam direction, the processor 503 is further configured to perform the following step after the step of transmitting the data within the maximum channel occupation time of the channel where the spectrum is located in the main beam direction:
if the data to be transmitted on the channel where the frequency spectrum is located in the main beam direction is not completely transmitted, triggering the complete channel detection process in the main beam direction to determine whether the channel where the frequency spectrum is located in the main beam direction can be occupied;
or the like, or, alternatively,
and if the data to be transmitted on the channel where the frequency spectrum is located in the main beam direction is not completely transmitted, triggering the step of adopting a simplified channel detection process on the channel where the frequency spectrum is located in the other beam directions to determine whether the channel where the frequency spectrum is located in the other beam directions can be occupied or not.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (8)
1. A method for beam-based channel detection, comprising:
when equipment needs to occupy a channel where a frequency spectrum is located to transmit data, the equipment determines a main beam;
the device determines whether a channel where the frequency spectrum is located can be occupied or not in a main beam direction by adopting a complete channel detection process in the main beam direction;
after determining that the channel where the frequency spectrum is located in the main beam direction can be occupied, adopting a simplified channel detection process in other beam directions to determine whether the channel where the frequency spectrum is located in the other beam directions can be occupied, wherein the detection steps of the simplified channel detection process are less than those of a complete channel detection process;
and when the channel where the frequency spectrum is located in the main beam direction is not detected to be available within a first preset time length, the equipment adopts the complete channel detection process in the other beam directions to determine whether the channel where the frequency spectrum is located in the other beam directions is available.
2. The method according to claim 1, wherein the determining whether the channel where the spectrum is located in the other beam direction is occupiable by using a simplified channel detection process in the other beam direction specifically includes:
and if the channel where the frequency spectrum is located in the other beam directions is detected to be idle in the first detection granularity, determining that the channel where the frequency spectrum is located in the other beam directions can be occupied.
3. The method according to claim 1 or 2, wherein the step of employing the simplified channel detection procedure in the other beam direction is preceded by:
when the channel where the frequency spectrum is located in the main beam direction is determined to be occupied, determining whether data needs to be sent in the channel where the frequency spectrum is located in the main beam direction;
when determining that the channel where the frequency spectrum is located in the main beam direction has data to be sent, sending the data in the maximum channel occupation time of the channel where the frequency spectrum is located in the main beam direction;
and when it is determined that no data needs to be transmitted in the channel where the spectrum is located in the main beam direction, triggering the step of adopting a simplified channel detection process in the other beam directions.
4. The method according to claim 3, wherein after the step of transmitting data within a maximum channel occupancy time of the channel on which the spectrum is located in the main beam direction when it is determined that there is data to be transmitted on the channel on which the spectrum is located in the main beam direction, further comprising:
if the data to be transmitted on the channel where the frequency spectrum is located in the main beam direction is not completely transmitted, triggering the device to adopt a complete channel detection process in the main beam direction, and determining whether the channel where the frequency spectrum is located in the main beam direction can be occupied;
or the like, or, alternatively,
and if the data to be transmitted on the channel where the frequency spectrum is located in the main beam direction is not completely transmitted, triggering the device to adopt a simplified channel detection process on the channel where the frequency spectrum is located in other beam directions, and determining whether the channel where the frequency spectrum is located in other beam directions can occupy.
5. A beam-based channel sensing device, comprising:
the main beam determining module is used for determining a main beam when a channel where a frequency spectrum is required to be occupied is used for transmitting data;
a first complete detection module, configured to determine whether a channel where the frequency spectrum is located in a main beam direction can be occupied by using a complete channel detection process in the main beam direction;
a simplified detection module, configured to, after the first complete detection module determines that the channel where the frequency spectrum is located in the main beam direction can be occupied, determine whether the channel where the frequency spectrum is located in the other beam directions can be occupied by using a simplified channel detection process in the other beam directions, where a detection step of the simplified channel detection process is less than a detection step of the complete channel detection process;
a second complete detection module, configured to, when the first complete detection module does not detect that the channel where the frequency spectrum is located in the main beam direction is available within a first preset time, determine whether the channel where the frequency spectrum is located in the other beam directions is available by using the complete channel detection process in the other beam directions.
6. The device according to claim 5, wherein the simplified detection module is specifically configured to, after the first complete detection module determines that the channel where the spectrum is located in the main beam direction is available, determine that the channel where the spectrum is located in the other beam directions is available when a first detection granularity detects that the channel where the spectrum is located in the other beam directions is idle.
7. The apparatus of claim 5 or 6, further comprising:
a data determining module, configured to determine whether there is data to be sent in a channel where the frequency spectrum is located in the main beam direction after the first integrity detecting module determines that the channel where the frequency spectrum is located in the main beam direction may be occupied;
a data sending module, configured to send data within a maximum channel occupation time of a channel where the frequency spectrum is located in the main beam direction when the data determining module determines that the channel where the frequency spectrum is located in the main beam direction has data to send;
a first triggering module, configured to trigger the simplified detection module when the data determination module determines that no data needs to be sent in a channel where the spectrum is located in the main beam direction.
8. The apparatus of claim 7, further comprising:
and the second triggering module is used for triggering the first complete detection module or the simplified detection module when the data to be transmitted on the channel where the frequency spectrum is located in the main beam direction is not completely transmitted after the data transmission module is executed.
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| CN108684077A (en) * | 2018-05-22 | 2018-10-19 | 宇龙计算机通信科技(深圳)有限公司 | A kind of channel detection method, client and base station |
| WO2019227442A1 (en) * | 2018-05-31 | 2019-12-05 | 北京小米移动软件有限公司 | Synchronization broadcast block configuration and parsing methods and devices, base station and user equipment |
| CN109196815B (en) | 2018-08-17 | 2022-06-03 | 北京小米移动软件有限公司 | Method and device for determining channel occupation information |
| US20210345314A1 (en) * | 2018-10-24 | 2021-11-04 | Beijing Xiaomi Mobile Software Co., Ltd. | Method and apparatus for channel detection on unlicensed frequency spectrum, and storage medium |
| WO2020087424A1 (en) * | 2018-10-31 | 2020-05-07 | Oppo广东移动通信有限公司 | Data transmission method, terminal device and storage medium |
| US11395154B2 (en) * | 2019-04-18 | 2022-07-19 | Qualcomm Incorporated | Methods and apparatuses for determining sensing beam for an LBT procure |
| WO2021237624A1 (en) * | 2020-05-28 | 2021-12-02 | 北京小米移动软件有限公司 | Method and apparatus for detecting unlicensed channel, and communication device and storage medium |
| CN114450901A (en) * | 2020-09-03 | 2022-05-06 | 北京小米移动软件有限公司 | Communication method, communication apparatus, communication device, and storage medium |
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| CN104219772B (en) * | 2013-05-31 | 2017-12-22 | 华为技术有限公司 | A kind of channel access method and channel access device |
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