CN111279653A

CN111279653A - Communication method, apparatus and storage medium

Info

Publication number: CN111279653A
Application number: CN201980004979.0A
Authority: CN
Inventors: 尹小俊; 黄源良; 戴劲
Original assignee: Shanghai Feilai Information Technology Co ltd
Current assignee: Shanghai Feilai Information Technology Co ltd
Priority date: 2019-01-31
Filing date: 2019-01-31
Publication date: 2020-06-12
Also published as: WO2020155012A1

Abstract

The embodiment of the invention provides a communication method, equipment and a storage medium, wherein the method comprises the following steps: acquiring an identifier of a first communication system; determining a position of a first measurement subframe of the first communication system according to the identification of the first communication system, wherein each communication system is configured with at least one measurement subframe within each configuration time interval, and each communication system in the plurality of communication systems is configured with measurement subframes of different positions according to the identification of each communication system in the plurality of communication systems. The wireless interference between each communication system can be reduced, and the communication quality is improved.

Description

Communication method, apparatus and storage medium

Technical Field

The present invention relates to the field of electronic technologies, and in particular, to a communication method, a device, and a storage medium.

Background

Because the multilayer wireless network has the characteristics of easy expansion, easy fault isolation and the like, the multilayer star-shaped wireless network is widely applied. For example, a control end controls a plurality of police drones to patrol certain places (such as stations), a control end controls a plurality of agricultural drones to fertilize crops, a control end controls a plurality of monitoring devices to monitor certain areas (such as shopping malls), and the like.

Taking a two-layer star wireless network as an example, a network topology structure of the two-layer star wireless network is shown in fig. 1 a. The two-layer star wireless network may include a high-level node and a plurality of communication systems, which are illustrated as two communication systems in fig. 1a, i.e., a first communication system and a second communication system. The higher-level node is configured to control each communication system, for example, to allocate a task to each communication system. Each communication system may include one or more middle layer nodes and one or more bottom layer nodes located below the middle layer nodes, all the communication systems use the same working frequency band, and the middle layer node at the highest layer of each communication system acquires a frequency point from the working frequency band as a working frequency point in the corresponding communication system. In a strict Time Division Duplex (TDD) system, the same frequency point is used by uplink and downlink subframes, and the frequency point defines a working frequency point; if the uplink sub-frame uses frequency hopping, only the downlink frequency point is defined as the working frequency point. Generally, the working frequency points of each communication system are determined by measuring subframes, for example, in fig. 1a, a bottom layer node scans multiple frequency points in a measurement subframe to obtain interference information corresponding to the multiple frequency points, and reports the interference information obtained by scanning to an intermediate layer node, and the intermediate layer node determines the working frequency points of the bottom layer node and/or the intermediate layer node according to the received interference information and the interference information obtained by scanning itself. In practice, it is found that there is a problem that the position of the measurement subframe is unreasonable, which results in large wireless interference between communication systems and reduces communication quality.

Disclosure of Invention

Embodiments of the present invention provide a communication method, device, and storage medium, which are beneficial to reducing wireless interference between communication systems and improving communication quality.

In a first aspect, an embodiment of the present invention provides a communication method, applied to a communication device in a first communication system, where the first communication system is one of a multi-layer wireless network, and the multi-layer wireless network includes multiple communication systems, and the method includes:

acquiring an identifier of a first communication system;

and determining the position of a first measurement subframe of the first communication system according to the identification of the first communication system, wherein each communication system is configured with at least one measurement subframe within each configuration time interval, and each communication system in the plurality of communication systems is configured with measurement subframes in different positions according to the identification of each communication system in the plurality of communication systems.

In a second aspect, an embodiment of the present invention provides a communication device, where the communication device is a node in a first communication system, the first communication system is one of multiple layers of wireless networks, and the multiple layers of wireless networks include multiple communication systems, and the control device includes: memory and processor

The memory to store program instructions;

the processor calls the program instructions stored in the memory to execute the following steps:

acquiring an identifier of a first communication system;

In a third aspect, an embodiment of the present invention provides a computer-readable storage medium, including: the computer-readable storage medium stores a computer program which, when executed by a processor, is adapted to perform the communication method as described above.

In the embodiment of the invention, the communication equipment can acquire the identifier of the first communication system and determine the position of the first measurement subframe of the first communication system according to the identifier of the first communication system, and because the positions of the measurement subframes of a plurality of communication systems are different, the problem of time overlapping of the acquisition of working frequency points of each communication system can be avoided, the wireless interference among the communication systems can be reduced, and the communication quality is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1a is a schematic diagram of a network topology of a two-layer star wireless network according to an embodiment of the present invention;

fig. 1b is a schematic diagram of a network topology of a three-layer star wireless network according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a communication method according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a frame structure of a radio frame according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a frame structure of another radio frame according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a frame structure of another radio frame according to an embodiment of the present invention;

fig. 6 is a schematic diagram illustrating a relationship between time for determining a working frequency point and a position of a measurement subframe according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a frame structure of a radio frame according to another embodiment of the present invention;

fig. 8 is a schematic diagram illustrating a relationship between time for determining a working frequency point and a position of a measurement subframe according to another embodiment of the present invention;

fig. 9 is a flow chart of another communication method provided by the embodiment of the invention;

fig. 10 is a flowchart illustrating a further communication method according to an embodiment of the present invention;

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

Detailed Description

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 only a part of the embodiments of the present invention, 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 invention.

In order to better understand a communication method and a device provided by the embodiment of the present invention, a system architecture to which the communication method is applied is described below.

The system architecture applied by the communication method can be a multi-layer wireless network. For example, the multi-layer wireless network may be a multi-layer star wireless network, and in other embodiments, the multi-layer wireless network may also be other suitable wireless networks having multiple layers. In this embodiment, a multi-layer star wireless network is taken as an example. Further, the multi-layer star wireless network may be a double-layer star wireless network or a three-layer star wireless network, etc. The multi-layer star wireless network can comprise at least two communication systems, namely at least a first communication system and a second communication system. Each communication system in the multi-layer star wireless network comprises at least one communication device, and each communication device can be regarded as each node and used for obtaining interference information in the scanning of the measurement subframe. The uppermost layer intermediate layer node in the communication system can determine the working frequency point according to the interference information obtained by scanning each node in the communication system. In this embodiment, the top-level middle-level node is defined as the first middle-level node.

Taking the multi-layer star wireless network as an example of a two-layer star wireless network, as shown in fig. 1a, the two-layer star wireless network includes a first communication system and a second communication system, each communication system of the two-layer star wireless network includes an intermediate layer node, and the intermediate layer node of the communication system is a node directly connected with an upper layer node. As shown in fig. 1a, each node of the first communication system is configured to scan for interference information in a measurement subframe. And after the measurement subframe is finished, each bottom layer node of the first communication system sends the interference information obtained by scanning to the middle layer node of the first communication system. And the intermediate layer node of the first communication system determines the working frequency point according to the interference information scanned by the intermediate layer node and the received interference information reported by the bottom layer node. And after the middle layer node of the first communication system determines the working frequency point, the working frequency point is issued to each bottom layer node of the first communication system. The principle of determining the working frequency point by the second communication system is the same as that of determining the working frequency point by the first communication system, and is not described herein again.

Further, taking the multi-layer star wireless network as a three-layer star wireless network as an example, as shown in fig. 1b, the three-layer star wireless network includes a first communication system and a second communication system, each communication system includes a high-level node, two intermediate-level nodes, and a bottom-level node. The two-layer middle layer nodes comprise a first middle layer node and a second middle layer node, wherein the first middle layer node is used for being directly connected with the high layer node, and the second middle layer node is used for being directly connected with the bottom layer node.

Specifically, as shown in fig. 1b, each node of the first communication system is configured to scan for interference information in a measurement subframe. And after the measurement subframe is finished, each bottom layer node of the first communication system sends the scanned interference information to a second middle layer node of the first communication system. And after the measurement subframe is finished, the second intermediate layer node sends the interference information obtained by scanning the second intermediate layer node and the received interference information to the first intermediate layer node. And the first intermediate layer node determines the working frequency point according to the interference information scanned by the first intermediate layer node and the received interference information reported by the second intermediate layer node. And after the intermediate layer node of the first communication system determines the working frequency point, the working frequency point is issued to each node of the first communication system. The principle of determining the working frequency point by the second communication system is the same as that of determining the working frequency point by the first communication system, and is not described herein again.

The multi-layer star wireless network of the embodiment of the application comprises a communication device, and the communication device is used for executing the communication method of the application. The communication device may be any one of the nodes in the first communication system in the multi-layer star wireless network. The first communication system may be any one of a multi-layer star wireless network. For example, the communication device may be any intermediate layer node or bottom layer node of the first communication system shown in fig. 1a or 1 b. The intermediate layer nodes in the multilayer star wireless network can be control equipment, such as a remote controller; the bottom node in the multi-layer star wireless network may be the mobile robot, which may be an unmanned aerial vehicle, an unmanned ground robot, an unmanned ship, or the like.

Referring to fig. 2, fig. 2 is a flowchart illustrating a communication method according to an embodiment of the present invention, where the method may be applied to the communication device, and as shown in fig. 2, the communication method may include the following steps.

S201, the communication equipment acquires the identification of the first communication system.

In the embodiment of the present invention, the communication device may obtain an identifier of the first communication system, where the identifier may refer to a number or a name of the first communication system. The mark may be composed of one or more of a number, a character, a letter, and a symbol. Wherein, the identifiers of all communication systems in the multi-layer star wireless network are different.

S202, the communication equipment determines the position of a first measurement subframe of the first communication system according to the identification of the first communication system.

Wherein each communication system is configured with at least one measurement subframe within each configuration time interval, and different communication systems in the plurality of communication systems are configured with measurement subframes in different positions according to the identification of the different communication systems in the plurality of communication systems. For example, one configuration time interval may be the duration of one radio frame or the duration of two radio frames, and the embodiment of the present invention is not limited thereto. Of course, a configuration time interval may not be an integer multiple of the duration of the radio frame, and the embodiment of the present application is not limited. One radio frame may be composed of a plurality of subframes. Typically, one radio frame includes 10 subframes, one subframe being 1ms (millisecond). One radio frame may also include more than 10 subframes or less than 10 subframes, and one subframe may also be greater than 1ms or less than 1ms, which is not limited in the embodiment of the present application.

Optionally, the first measurement subframe of the first communication system is a measurement subframe of the first communication system in a first configuration time interval.

For example, a multi-layer star wireless network has two communication systems, a first communication system and a second communication system. The configuration time interval is one radio frame. The first communication system is configured with one or more measurement subframes in the first radio frame, and the second communication system is also configured with one or more measurement subframes in the first radio frame. The first communication system is configured with one or more measurement subframes in the second radio frame, and the second communication system is also configured with one or more measurement subframes in the second radio frame. By analogy, the first communication system and the second communication system are configured with one or more measurement subframes in each radio frame. The position of the measurement subframe of the first communication system and the position of the measurement subframe of the second communication system are different in the first radio frame. And in the second radio frame, the position of the measurement subframe of the first communication system is different from the position of the measurement subframe of the second communication system, and so on. Wherein the first measurement subframe of the first communication system is a measurement subframe included in the first radio frame.

In the embodiment of the application, the multi-layer star wireless network configures the measurement subframe of the communication system in the first configuration time interval according to the identification of the communication system. The multi-layer star wireless network configures the measurement subframes at different positions for different communication systems within a first configuration time interval according to the identifications of the different communication systems. Therefore, the position of the measurement subframe of the first communication system within the first configured time interval can be determined according to the identity of the first communication system, i.e. the position of the first measurement subframe of the first communication system can be determined according to the identity of the first communication system. The multi-layer star radio may configure a measurement subframe of a subsequent first communication system according to a position and a configuration time interval of a first measurement subframe of the first communication system.

For example, as shown in fig. 3, one configuration time interval is the duration of one radio frame. The first radio frame is a first configured time interval and the second radio frame is a second configured time interval. By analogy, the radio frames after the second radio frame are not shown in fig. 3, and fig. 3 takes the first radio frame and the second radio frame as an example. The multi-layer star wireless network configures one or more measurement subframes in each radio frame for each communication system according to the identification of each communication system, and fig. 3 illustrates an example in which each communication system is configured with one measurement subframe in one radio frame. As shown in fig. 3, the multi-layer star wireless network configures subframe 2 in the first wireless frame as a first measurement subframe of the first communication system according to the identifier of the first communication system. And the multi-layer star wireless network configures the subframe 3 in the first wireless frame as a first measurement subframe of the second communication system according to the identifier of the second communication system. And the multi-layer star wireless network configures the subframe 2 in the second wireless frame as the measurement subframe of the first communication system according to the position and the configuration time interval of the first measurement subframe of the first communication system. And the multi-layer star wireless network configures the subframe 3 in the second wireless frame as the measurement subframe of the second communication system according to the position and the configuration time interval of the first measurement subframe of the second communication system. Thus, the location of the first measurement subframe of the first communication system may be determined to be subframe 2 in the first radio frame based on the identity of the first communication system. Further, the location of the first measurement subframe of the second communication system may be determined to be subframe 3 in the first radio frame based on the identity of the second communication system.

If the positions of the measurement subframes of each communication system in the multilayer star wireless network are the same, each communication system is in a signal receiving state in the measurement subframes, and no communication system is in a signal sending state, so that each communication system cannot detect interference information of other communication systems in the multilayer star wireless network, and further working frequency points determined by a plurality of communication systems are possibly the same or adjacent. The same or adjacent working frequency points of a plurality of communication systems can cause interference among the communication systems, and in severe cases, the plurality of communication systems can not work normally. In the method depicted in fig. 2, different communication systems are configured with measurement subframes in different locations according to their identities. Thus, the communication device of the first communication system may determine the location of the first measurement subframe of the first communication system from the identity of the first communication system. The position of the first measurement subframe of the first communication system determined by the communication equipment of the first communication system is different from the positions of the measurement subframes determined by other communication systems, so that the working frequency point determined by the first communication system according to the interference information obtained by scanning the first measurement subframe is different from the working frequency points determined by other communication systems. Thus, by implementing the method described in fig. 2, it is beneficial to reduce radio interference between the various communication systems.

As an alternative embodiment, the frame structure of the radio frame including the measurement subframe is different for each communication system in the multi-layer star wireless network.

For example, the configuration time interval is a radio frame, and each communication system includes a measurement subframe in the configuration time interval. The frame structure of the radio frames of the first communication system and the second communication system may be as shown in fig. 3. In fig. 3, D represents a downlink subframe in a radio frame, U represents an uplink subframe, and M represents a measurement subframe; the downlink subframe is a subframe for transmitting data to the bottom node by the middle node, and the uplink subframe is a subframe for transmitting data to the middle node by the bottom node. As shown in fig. 3, in the first radio frame, the position of the measurement subframe of the first communication system is the position of the subframe 2 in the first radio frame, and the position of the measurement subframe of the second communication system is the position of the subframe 3 in the first radio frame. Similarly, in the second radio frame, the position of the measurement subframe of the first communication system is the position of the subframe 2 in the second radio frame, and the position of the measurement subframe of the second communication system is the position of the subframe 3 in the second radio frame. As shown in fig. 3, the frame structure of the first radio frame of the first communication system in fig. 3 is different from the frame structure of the first radio frame of the second communication system, and the frame structure of the second radio frame of the first communication system in fig. 3 is different from the frame structure of the second radio frame of the second communication system.

In one embodiment, when the frame structure of the radio frame including the measurement subframe is different for each communication system in the multi-layer star wireless network, different communication systems may have different numbers of measurement subframes within one configuration time interval. For example, as shown in fig. 4, the time interval is configured to be one radio frame. The first communication system has two measurement subframes and the second communication system has one measurement subframe in the first radio frame and the second radio frame.

In one embodiment, when the frame structures of the radio frames including the measurement subframes of the respective communication systems in the multi-layer star wireless network are different, the two adjacent configuration time intervals may be the same or different. For example, the first configuration time interval may be a duration of one radio frame, the second configuration time interval may be a total duration of two radio frames, and the third configuration time interval may be a total duration of three radio frames.

As an alternative implementation manner, each communication system in the multi-layer star wireless network is configured with at least one measurement subframe in turn in a configuration time interval with a target time as a period, wherein the configuration time interval is the product of the target time and the number of communication systems in the multi-layer star wireless network. For example, the multi-layer star wireless network includes 2 communication systems, and the target time is 1 wireless frame duration, and the configuration time interval is 2 wireless frame durations. It is understood that in other embodiments, each communication system may need multiple radio frames for one measurement, where the target time is a duration of multiple radio frames, for example, the target time is a duration of 3 radio frames, and the configuration time interval is a product of a duration of 3 radio frames and the number of communication systems in the multi-layer star wireless network.

The rotation configuration order in which the respective communication systems are configured with the measurement subframes in rotation may be set according to the identities of the communication systems. For example, in a configuration time interval, a measurement subframe may be configured for a first communication system and then a measurement subframe may be configured for a second communication system.

For example, a multi-layer star wireless network includes 2 communication systems, the target time is the duration of one radio frame, the configuration time interval is the duration of two radio frames, and each communication system includes one measurement subframe in one configuration time interval. As shown in fig. 5, the first configured time interval is the first radio frame + the second radio frame. In the first configuration time interval, the subframe 2 of the first radio frame is configured as the measurement subframe of the first communication system, and then the subframe 2 of the second radio frame is configured as the measurement subframe of the second communication system. Similarly, in the second configuration time interval, the subframe 2 of the third radio frame is configured as the measurement subframe of the first communication system, and then the subframe 2 of the fourth radio frame is configured as the measurement subframe of the second communication system. Therefore, the first communication system and the second communication system are configured with the measurement subframes alternately in a period of the duration of one radio frame in one configuration time interval.

In one embodiment, each of the plurality of communication systems is configured with at least one measurement subframe in turn in a configuration time interval with a target time as a period, the configuration time interval is a product of the target time and the number of the communication systems in the plurality of communication systems, and the frame structures of the radio frames of the respective communication systems including the measurement subframe are the same. As shown in fig. 5, the first radio frame structure of the first communication system is the same as the second radio frame structure of the second communication system, and the third radio frame structure of the first communication system is the same as the fourth radio frame structure of the second communication system.

In one embodiment, each of the plurality of communication systems is configured with at least one measurement subframe in turn in a configuration time interval with a target time as a period, the configuration time interval is a product of the target time and the number of the communication systems in the plurality of communication systems, and different communication systems can have different numbers of measurement subframes in one configuration time interval.

In one embodiment, each of the plurality of communication systems is configured with at least one measurement subframe in turn in a configuration time interval with a target time as a period, the configuration time interval is a product of the target time and the number of the communication systems in the plurality of communication systems, the plurality of communication systems comprises a second communication system, and the position of the measurement subframe of the second communication system is after the working frequency point determined by the first communication system if the position of the measurement subframe of the first communication system is before the position of the measurement subframe of the second communication system in one configuration time interval.

For example, as shown in fig. 5, within one such configured time interval, the position of the measurement subframe of the first communication system precedes the position of the measurement subframe of the second communication system. As shown in fig. 6, assuming that the configuration time interval is the duration of two radio frames, in one configuration time interval, the time of the first communication system determining the operating frequency point is t1, the position of the measurement subframe of the second communication system is t2, and t1 is before t2, that is, the position of the measurement subframe of the second communication system is after the first measurement subframe determines the operating frequency point. After the intermediate layer node of the first communication system acquires the interference information, a certain time is required for calculating the working frequency point, so that a certain interval exists between the position of the measurement subframe of the first communication system and the working frequency point determined by the first communication system. Similarly, in the next configuration time interval, the position of the measurement subframe of the first communication system is also before the position of the measurement subframe of the second communication system, and the position of the measurement subframe of the second communication system is also after the working frequency point is determined by the first communication system.

In one embodiment, the plurality of communication systems include a second communication system, and within one of the configured time intervals, if the position of the measurement subframe of the first communication system is behind the position of the measurement subframe of the second communication system, the position of the measurement subframe of the first communication system is behind the operating frequency points determined by the second communication system.

For example, as shown in fig. 7, the first communication system and the second communication system are alternately configured with the measurement subframes in a period of a target time (i.e., a duration of one radio frame). In the first radio frame, the subframe 2 is configured as a measurement subframe of the second communication system, and in the second radio frame, the subframe 2 is configured as a measurement subframe of the first communication system. Each configuration time interval (i.e., the duration of two radio frames) the first communication system has one measurement subframe and each configuration time interval the second communication system has one measurement subframe. As shown in fig. 7, within one configuration time interval, the position of the measurement subframe of the first communication system is subsequent to the position of the measurement subframe of the second communication system. As shown in fig. 8, it is assumed that the position of the measurement subframe determined by the first communication system is t4, and the time of determining the operating frequency point of the second communication system is t3, where t4 is after t3, that is, the position of the measurement subframe of the first communication system is after the operating frequency point is determined by the second communication system. After the middle layer of the second communication system acquires the interference information, a certain time is required to determine the working frequency point, so that a certain interval exists between the position of the measurement subframe of the second communication system and the working frequency point determined by the second communication system.

In an embodiment, the communication device is a bottom layer node of the first communication system or an intermediate layer node except a first intermediate layer node in the first communication system, the communication device scans multiple frequency points in the first measurement subframe to obtain interference information corresponding to the multiple frequency points, the communication device sends the interference information corresponding to the multiple frequency points to the first intermediate layer node of the first communication system, the interference information corresponding to the multiple frequency points is used for the first intermediate layer node of the first communication system to determine a working frequency point, and the communication device receives the working frequency point fed back by the first intermediate layer node of the first communication system.

If the multi-layer star wireless network is a double-layer star wireless network, the communication device may be a bottom node of the first communication system. For example, the communication device may be any bottom layer node of the first communication system in the two-layer star wireless network shown in fig. 1a, and the first middle layer node of the first communication system is an intermediate layer node of the first communication system. Each bottom layer node of the first communication system can scan a plurality of frequency points in the first measurement subframe to obtain interference information corresponding to the frequency points, and report the interference information to an intermediate layer node of the first communication system; the middle layer node determines a working frequency point according to the received interference information and the interference information obtained by scanning the middle layer node, and feeds the working frequency point back to each bottom layer node of the first communication system, and each bottom layer node and the middle layer node of the first communication system can send and receive information with the working frequency point.

If the multi-layer star wireless network is a three-layer star wireless network or a star wireless network with more than three layers, the communication device may be a bottom layer node of the first communication system or an intermediate layer node of the first communication system except for the first intermediate layer node. For example, the communication device may be any bottom node of the first communication system in the three-layer star wireless network shown in fig. 1b, and the first middle node of the first communication system is the first middle node of the first communication system. Each bottom layer node of the first communication system can scan the first measurement subframe aiming at the multiple frequency points to obtain the interference information corresponding to the multiple frequency points, and reports the interference information to the second middle layer node of the first communication system. And the second intermediate layer node of the first communication system reports the interference information obtained by scanning the second intermediate layer node and the received interference information to the first intermediate layer node of the first communication system, and the first intermediate layer node of the first communication system determines the working frequency point according to the received interference information and the interference information obtained by scanning the first intermediate layer node. Further, a first intermediate layer node of the first communication system issues the working frequency point to each second intermediate layer node of the first communication system, and each bottom layer node of the first communication system receives the working frequency point forwarded by each second intermediate layer node of the first communication system.

For another example, the communication device may be an intermediate layer node in the first communication system shown in fig. 1b except for the first intermediate layer node, that is, the communication device may be any intermediate layer node in the second intermediate layer nodes in the first communication system, and the first intermediate layer node of the first communication system is the first intermediate layer node of the first communication system. Each second intermediate layer node of the first communication system may scan multiple frequency points in the first measurement subframe to obtain interference information corresponding to the multiple frequency points, and report the interference information obtained by scanning itself and the interference information obtained by scanning each bottom layer node to the first intermediate layer node of the first communication system. The first intermediate layer node of the first communication system obtains interference information according to self scanning and determines a working frequency point according to the received interference information, and each second intermediate layer node in the first communication system can receive the working frequency point sent by the first intermediate layer node of the first communication system. Each second intermediate layer node in the first communication system may also forward the working frequency point to each bottom layer node of the first communication system, and the first intermediate layer node, each second intermediate layer node, and each bottom layer node of the first communication system may send and receive information at the working frequency point.

In another embodiment, the communication device is a first intermediate level node of the first communication system, the communication equipment receives interference information corresponding to a plurality of frequency points sent by a plurality of bottom layer nodes of the first communication system and/or middle layer nodes except the first middle layer node in the first communication system, the interference information corresponding to the multiple frequency points is obtained by scanning multiple frequency points in the first measurement subframe by multiple bottom layer nodes of the first communication system and/or middle layer nodes except the first middle layer node in the first communication system, the communication equipment determines the average interference value corresponding to each frequency point according to the received interference information, the communication equipment takes the frequency point with the minimum average interference value as a working frequency point, and the communication equipment feeds the working frequency point back to a plurality of bottom layer nodes of the first communication system and/or middle layer nodes except the first middle layer node in the first communication system. Specifically, the interference value corresponding to each frequency point may be an average interference value, or may be an interference value obtained by another suitable algorithm such as calculating a variance.

For example, the communication device may be an intermediate layer node of the first communication system in the two-layer star wireless network shown in fig. 1a, the multiple frequency points are f0 to fM, M is the number of frequency points, and the interference information may include an interference value corresponding to each frequency point. The communication equipment can receive interference information sent by each bottom layer node, the interference information sent by each bottom layer node comprises an interference value corresponding to each frequency point measured by each frequency point in frequency points f 0-fM in a first measurement subframe, the middle layer node calculates an average interference value corresponding to each frequency point according to the received interference information and the interference information obtained by scanning the middle layer node, and the frequency point with the minimum average interference value is used as a working frequency point and is returned to each bottom layer node. The communication device may calculate the working frequency point by using formula (1).

freq_working＝fiwhith min(average_ipsd(fi)) (1)

The average _ ipsd (fi) represents an average value of interference values measured by all bottom-layer nodes on a first measurement subframe aiming at a fi frequency point, the fi represents an ith frequency point, the i is 1, 2 …, M, and freq _ work represents a working frequency point of the first communication system.

For another example, the communication device may be a first intermediate node of a first communication system in the multi-layer star wireless network shown in fig. 1b, where the first intermediate node of the first communication system may receive interference information sent by each second intermediate node of the first communication system, where the interference information includes interference information scanned by each second intermediate node of the first communication system itself and interference information scanned by each bottom node of the first communication system. The first intermediate layer node of the first communication system may determine the working frequency point according to the received interference information and the interference information obtained by scanning by the first intermediate layer node of the first communication system. The first intermediate layer node of the first communication system may send the working frequency point to a second intermediate layer node of the first communication system, and the second intermediate layer node of the first communication system forwards the working frequency point to each bottom layer node of the first communication system.

In one embodiment, the adjacent subframes of the first measurement subframe include at least one uplink subframe. Due to the radio frequency transceiving switching of the TDD system, the frequency point bandwidth switching requires a stable time. The radio frequency chip is usually configured with two phase-locked loops (PLLs) to act on a receiving event and a sending event respectively, so that the switching frequency point and the bandwidth overhead between the receiving event and the sending event are relatively small, and the switching frequency point and the bandwidth overhead between the two receiving events are relatively large, so that the switching frequency point and the bandwidth overhead are avoided as much as possible in design. However, due to the fact that adjacent subframes are received and measured in the frame structure of the dudmddddddddd, the subframe switching involves the change of frequency points and bandwidth, so that the measurement subframe may be less than 1ms, which may reduce the measurement efficiency, and even the measurement cannot be completed in some cases. To avoid this, at least one uplink subframe may be configured in the adjacent subframe of the first measurement subframe. For example, a radio frame structure including a measurement subframe of the first communication system may be set to dumdddddddd or duddumdd.

Further, in one embodiment, the multi-tier star wireless network includes a higher level node through which the time reference of the communication device is obtained. To synchronize the time of each node in the multi-tier star wireless network, a time reference may be sent by an upper node for lower nodes of the upper node. Accordingly, the time reference of the communication device is obtained by the higher level node. In one embodiment, the higher level node may be an RTK base station or a top level scheduler.

In the embodiment of the invention, the communication equipment can acquire the identifier of the first communication system and determine the position of the first measurement subframe of the first communication system according to the identifier of the first communication system, so that the positions of the measurement subframes of a plurality of communication systems are different, the problem of time overlapping of acquiring working frequency points by each communication system can be avoided, the wireless interference among the communication systems can be reduced, and the communication quality is improved.

Based on the above description of the communication method, an embodiment of the present invention provides another communication method, which may be applied to the communication device, and the embodiment of the present invention mainly embodies a case where frame structures of radio frames including measurement subframes of different communication systems are different. As shown in fig. 9, the communication method may include the following steps.

S901, the communication equipment acquires the identification of the first communication system.

In the embodiment of the present invention, please refer to the description corresponding to S201 for how the communication device obtains the identifier of the first communication system, which is not described herein again.

S902, the communication device determines, according to the identifier of the first communication system, a position of a first measurement subframe of the first communication system, where positions of measurement subframes of the communication systems are different.

In the embodiment of the present invention, please refer to the description corresponding to S202 for how the communication device determines the position of the first measurement subframe of the first communication system according to the identifier of the first communication system, which is not described herein again.

Wherein, the frame structure of the wireless frame including the measurement subframe is different for different communication systems.

And S903, the communication device determines the position of a second measurement subframe of the first communication system according to the position of the first measurement subframe and the configuration time interval.

In the embodiment of the invention, the multi-layer star wireless configures the measurement subframes with different positions for different communication systems in the first configuration time interval according to the identifiers of the different communication systems. The multi-layer star radio may configure a measurement subframe of a subsequent first communication system according to a position and a configuration time interval of a first measurement subframe of the first communication system. Therefore, after the communication device determines the position of the first measurement subframe, the position of the second measurement subframe of the first communication system can be determined according to the position of the first measurement subframe and the configuration time interval. The second measurement subframe may refer to any measurement subframe configured in any configuration time interval except the first configuration time interval.

For example, as shown in fig. 3, one configuration time interval is the duration of one radio frame. After the communication device of the first communication system determines that the position of the subframe 2 in the first radio frame is the position of the first measurement subframe of the first communication system, the communication device of the first communication system determines that the position of the subframe 2 in the second radio frame is the position of the second radio frame according to the position of the subframe 2 in the first radio frame and the configuration time interval.

In the embodiment of the invention, the communication equipment can acquire the identifier of the first communication system and determine the position of the first measurement subframe of the first communication system according to the identifier of the first communication system, the positions of the measurement subframes of the plurality of communication systems are different, so that the problem of time overlapping of the acquisition of the working frequency points of each communication system can be avoided, the wireless interference among the communication systems can be reduced, and the communication quality can be improved. And the second measurement subframe of the first communication system can be determined according to the position and the configuration time interval of the first measurement subframe, so that the working frequency point can be periodically acquired.

Based on the above description of the communication method, an embodiment of the present invention provides yet another communication method that can be applied to the above communication device, and the embodiment of the present invention embodies a case where frame structures of radio frames including measurement subframes, which describe different communication systems, are the same. As shown in fig. 10, the communication method may include the following steps.

S1001, the communication equipment acquires the identification of the first communication system.

S1002, the communication device determines a rotation configuration order of measurement subframes which are configured by the first communication system in rotation according to the identification of the first communication system.

Wherein the positions of the measurement subframes of each of the plurality of communication systems of the multi-layer star wireless network are different. And configuring at least one measurement subframe in turn for each of the plurality of communication systems in a period of a target time within one configuration time interval, wherein the configuration time interval is the product of the target time and the number of the communication systems in the plurality of communication systems. The radio frame structure of each communication system including the measurement subframe is the same.

S1003, the communication equipment determines the position of a first measurement subframe of the first communication system according to the rotation configuration sequence.

The identification of the communication system and the alternate configuration sequence of the alternate configuration have a corresponding relation. The communication device may store the correspondence in advance. Alternatively, the communication device may acquire, from the upper node, a correspondence between the identifier of the first communication system and the rotation order of the rotation. Correspondingly, for the first communication system, the communication device may determine, according to the identifier of the first communication system, a rotation configuration order corresponding to the first communication system, and further determine, according to the rotation configuration order, a position of the first measurement subframe of the first communication system. For example, the identifier of the first communication system corresponds to rotation configuration order 1, and the identifier of the second communication system corresponds to rotation configuration order 2, that is, within a configuration time interval, the measurement subframe of the first communication system is configured first, and then the measurement subframe of the second communication system is configured. For example, as shown in fig. 5, a measurement subframe of the first communication system is configured in the first radio frame, and a measurement subframe of the second communication system is configured in the second radio frame. Alternatively, the position of the measurement subframe in the radio frame may be a predetermined fixed position, for example, as shown in fig. 5, the measurement subframe is in subframe 2 of the first radio frame and the second radio frame. After the communication device determines the rotation order, it may determine that subframe 2 of the first radio frame is a measurement subframe of the first communication system.

S1004, the communication device determines a configuration time interval according to the target time and the number of communication systems in the plurality of communication systems. That is, the configuration time interval is the product of the target time and the number of communication systems in the plurality of communication systems, and assuming that the multi-layer star wireless network includes 2 communication systems, the first time is 10ms, 2 × 10 is 20ms, that is, the configuration time interval may be 20 ms.

S1005, the communication device determines a location of a second measurement subframe of the first communication system according to the configured time interval and the location of the first measurement subframe.

For example, the communication device may configure measurement subframes of the respective communication systems in turn, where the multi-layer star wireless network includes a first communication system and a second communication system, and assuming that the first measurement subframes of the first communication system and the second communication system are as shown in fig. 5, the position of the second measurement subframe of the first communication system is the position of the first measurement subframe of the first communication system plus a configuration time interval, that is, the position of the second measurement subframe of the first communication system is the position of subframe 2 in the third wireless subframe; the position of the second measurement subframe of the second communication system is the position of the first measurement subframe of the second communication system plus the configuration time interval, that is, the position of the second measurement subframe of the second communication system is the position of subframe 2 in the fourth radio subframe.

In the embodiment of the present invention, a communication device may obtain an identifier of a first communication system, determine, by the communication device, a rotation configuration order in which measurement subframes of the first communication system are configured in rotation according to the identifier of the first communication system, and determine, by the communication device, a position of a first measurement subframe of the first communication system according to the rotation configuration order. The problem of time overlapping of the working frequency points acquired by each communication system can be avoided, the wireless interference among the communication systems can be reduced, and the communication quality is improved. And the position of the second measurement subframe of the first communication system can be determined according to the configuration time interval and the position of the first measurement subframe, so that the working frequency point can be periodically acquired.

Referring to fig. 11, fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present invention. This communications facilities is arbitrary node in the above-mentioned first communication system, and this communications facilities can be equipment such as unmanned aerial vehicle or remote controller. Specifically, the communication device includes: a processor 110 and a memory 111.

The memory 111 may include a volatile memory (volatile memory); the memory 111 may also include a non-volatile memory (non-volatile memory); the memory 111 may also comprise a combination of memories of the kind described above. The processor 110 may be a Central Processing Unit (CPU). The processor 801 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), or any combination thereof.

In one embodiment, the memory is to store program instructions; the processor calls the program instructions stored in the memory to execute the following steps:

acquiring an identifier of a first communication system;

Optionally, the frame structures of the radio frames including the measurement subframes of the respective communication systems are different.

and determining the position of a second measurement subframe of the first communication system according to the position of the first measurement subframe and a configuration time interval.

Optionally, each of the plurality of communication systems is configured with at least one measurement subframe in turn in a configuration time interval with a target time as a period, where the configuration time interval is a product of the target time and the number of communication systems in the plurality of communication systems.

Optionally, the radio frames of the measurement subframes of the respective communication systems have the same structure.

determining a rotation configuration order of measurement subframes which are configured by the first communication system in rotation according to the identification of the first communication system;

and determining the position of a first measurement subframe of the first communication system according to the alternate configuration order.

determining a configuration time interval according to the target time and the number of communication systems in the plurality of communication systems;

and determining the position of a second measurement subframe of the first communication system according to the configuration time interval and the position of the first measurement subframe.

Optionally, the adjacent subframes of the first measurement subframe include at least one uplink subframe.

Optionally, the plurality of communication systems include a second communication system, and within one of the configuration time intervals, if the position of the measurement subframe of the first communication system is before the position of the measurement subframe of the second communication system, the position of the measurement subframe of the second communication system is after the first communication system determines the working frequency point; and if the position of the measurement subframe of the first communication system is behind the position of the measurement subframe of the second communication system, the position of the measurement subframe of the first communication system is behind the working frequency point determined by the second communication system.

In one embodiment, the communication device is an underlying node of the first communication system or an intermediate layer node of the first communication system other than a first intermediate layer node, and the memory is configured to store program instructions; the processor calls the program instructions stored in the memory to execute the following steps:

scanning a plurality of frequency points in the first measurement subframe to obtain interference information corresponding to the plurality of frequency points;

sending the interference information corresponding to the multiple frequency points to a first intermediate layer node of the first communication system, wherein the interference information corresponding to the multiple frequency points is used for the first intermediate layer node of the first communication system to determine working frequency points;

and receiving the working frequency point fed back by the first intermediate layer node of the first communication system.

In one embodiment, the communication device is a first intermediate level node of the first communication system, the memory storing program instructions; the processor calls the program instructions stored in the memory to execute the following steps:

receiving interference information corresponding to a plurality of frequency points sent by a plurality of bottom layer nodes of the first communication system and/or middle layer nodes except the first middle layer node in the first communication system, wherein the interference information corresponding to the plurality of frequency points is obtained by scanning the plurality of bottom layer nodes of the first communication system and/or the middle layer nodes except the first middle layer node in the first communication system for the plurality of frequency points in the first measurement subframe;

determining an average interference value corresponding to each frequency point according to the received interference information;

taking the frequency point with the minimum average interference value as a working frequency point;

and feeding the working frequency points back to a plurality of bottom layer nodes of the first communication system and/or middle layer nodes except the first middle layer node in the first communication system.

Optionally, the multi-layer wireless network includes a higher-layer node, and the time reference of the communication device is obtained by the higher-layer node.

In the embodiment of the present invention, a computer-readable storage medium is further provided, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the communication method described in the embodiment corresponding to fig. 2, fig. 10, and fig. 9 of the present invention is implemented, and also the communication device in the embodiment of the present invention shown in fig. 11 may be implemented, which is not described herein again.

The computer readable storage medium may be an internal storage unit of the test device according to any of the foregoing embodiments, for example, a hard disk or a memory of the device. The computer-readable storage medium may also be an external storage device of the vehicle control apparatus, such as a plug-in hard disk provided on the device, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like. Further, the computer-readable storage medium may also include both an internal storage unit and an external storage device of the apparatus. The computer-readable storage medium is used for storing the computer program and other programs and data required by the test equipment. The computer readable storage medium may also be used to temporarily store data that has been output or is to be output.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the computer program is executed. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like. The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.

Claims

1. A communication method applied to a communication device in a first communication system, wherein the first communication system is one communication system in a multi-layer wireless network, and the multi-layer wireless network comprises a plurality of communication systems, the method comprising:

acquiring an identifier of a first communication system;

determining a position of a first measurement subframe of the first communication system according to the identification of the first communication system, wherein each communication system is configured with at least one measurement subframe within each configuration time interval, and each communication system in the plurality of communication systems is configured with measurement subframes of different positions according to the identification of each communication system in the plurality of communication systems.

2. The method of claim 1, wherein the respective communication systems comprise different frame structures of radio frames of the measurement subframes.

3. The method of claim 2, further comprising:

determining a position of a second measurement subframe of the first communication system according to the position of the first measurement subframe and the configuration time interval.

4. The method of claim 1, wherein each of the plurality of communication systems is configured with at least one measurement subframe in turn in a period of a target time within one of the configuration time intervals, and wherein the configuration time interval is a product of the target time and a number of the communication systems in the plurality of communication systems.

5. The method of claim 4, wherein the frame structure of the radio frames comprising the measurement subframes is the same for each communication system.

6. The method of claim 5, wherein the determining the location of the first measurement subframe of the first communication system according to the identity of the first communication system comprises:

determining a rotation configuration order in which the first communication system is configured with at least one measurement subframe in rotation according to the identifier of the first communication system;

determining a position of the first measurement subframe of the first communication system according to the rotation configuration order.

7. The method of claim 6, further comprising:

determining the configuration time interval according to the target time and the number of communication systems in the plurality of communication systems;

8. The method according to any of claims 1-7, wherein the subframes adjacent to the first measurement subframe comprise at least one uplink subframe.

9. The method according to any one of claims 4-7, wherein the plurality of communication systems includes a second communication system, and within one of the configuration time intervals, if the position of the measurement subframe of the first communication system is before the position of the measurement subframe of the second communication system, the position of the measurement subframe of the second communication system is after the working frequency point is determined by the first communication system; and if the position of the measurement subframe of the first communication system is behind the position of the measurement subframe of the second communication system, the position of the measurement subframe of the first communication system is behind the working frequency point determined by the second communication system.

10. The method according to any of claims 1-7, wherein the communication device is an underlying node of the first communication system or an intermediate layer node of the first communication system other than a first intermediate layer node, the method further comprising:

11. The method of any of claims 1-7, wherein the communication device is a first intermediate level node of the first communication system, the method further comprising:

12. The method according to any one of claims 1-7, further comprising: the multi-layer wireless network includes an upper layer node through which time references of the plurality of communication systems are acquired.

13. A communication apparatus, the communication apparatus being a node in a first communication system, the first communication system being one communication system in a multi-layer wireless network including a plurality of communication systems, the control apparatus comprising: memory and processor

The memory to store program instructions;

acquiring an identifier of a first communication system;

14. The apparatus of claim 13, wherein the frame structure of the radio frames comprising the measurement subframes of the respective communication systems is different.

15. The apparatus of claim 14, wherein the processor is specifically configured to perform the steps of:

16. The apparatus of claim 13, wherein each of the plurality of communication systems is configured with at least one measurement subframe in turn in a period of a target time within one of the configuration time intervals, and wherein the configuration time interval is a product of the target time and a number of communication systems in the plurality of communication systems.

17. The apparatus of claim 16, wherein the frame structures of the radio frames of the respective communication systems including the measurement subframe are the same.

18. The apparatus of claim 17, wherein the processor is specifically configured to perform the steps of:

19. The apparatus of claim 18,

the processor is specifically configured to perform the following steps:

20. The apparatus according to any of claims 13-19, wherein the subframes adjacent to the first measurement subframe comprise at least one uplink subframe.

21. The apparatus according to any of claims 16-19, wherein the plurality of communication systems includes a second communication system, and within one of the configured time intervals, if the position of the measurement subframe of the first communication system is before the position of the measurement subframe of the second communication system, the position of the measurement subframe of the second communication system is after the operating frequency point determined by the first communication system; and if the position of the measurement subframe of the first communication system is behind the position of the measurement subframe of the second communication system, the position of the measurement subframe of the first communication system is behind the working frequency point determined by the second communication system.

22. The device according to any of claims 13-19, wherein the communication device is a bottom layer node of the first communication system or an intermediate layer node of the first communication system other than a first intermediate layer node, and wherein the processor is specifically configured to perform the following steps:

23. The device according to any of claims 13-19, wherein the communication device is a first intermediate node of the first communication system, and wherein the processor is specifically configured to perform the steps of:

24. The apparatus according to any of claims 13-19, wherein the multi-layer wireless network comprises higher layer nodes, and wherein the time reference of the communication device is obtained by the higher layer nodes.

25. A computer-readable storage medium, comprising: the computer-readable storage medium stores a computer program which, when executed by a processor, is adapted to perform the communication method of any one of claims 1 to 12.