Clustering networking method based on wide-beam directional communication

Abstract

The invention provides a clustering networking method based on wide-beam directional communication, and belongs to the technical field of directional wireless communication networking. According to the method, the service reliability transmission of communication nodes in a network compatible with different channel transmission characteristics is realized through clustering, the distance between the communication nodes in a cluster is relatively short, the channel is continuous and stable, a distributed asynchronous networking mode is adopted, the distance between the communication nodes between the clusters is relatively long, the channel is random and burst, and an asynchronous point-to-point communication mode is adopted. According to the method, in a clustering networking scene based on wide-beam directional communication, the coverage range, the transmission efficiency and the system capacity of a wireless communication network in some special application scenes are improved by fusing application modes of intra-cluster and inter-cluster channel transmission characteristics and designing a unified MAC communication protocol.

Description

Technical Field

[0001] The present invention relates to the field of directional wireless communication networking technology, and in particular to a clustering networking method based on wide-beam directional communication. The method combines the wide-beam directional transmission technology in wireless communication, the clustering network architecture, and the differentiated application of channel transmission characteristics, and aims to improve the coverage, transmission efficiency, and system capacity of the wireless communication network, and is suitable for certain special application scenarios. Background Art

[0002] With the rapid development of wireless communication technology, wireless communication networks are facing the increasing number of connected devices, data transmission requirements and complex and changing communication environments. Traditional wireless communication technologies are difficult to meet the requirements of large-scale coverage, high data transmission rate and low power consumption at the same time. In order to solve these problems, cluster networking technology came into being. By dividing the network into multiple small-scale, self-organizing cluster structures, each device in each cluster can achieve efficient connection through short-distance communication, and information can be exchanged between clusters through long-distance communication. However, existing cluster networking methods often ignore the differences in channel transmission characteristics within and between clusters, resulting in low communication efficiency, and lack of a unified communication protocol to support the integrated application of different channel transmission characteristics.

[0003] Wide beam directional communication technology is an effective means to achieve long-distance, low-power communication. By adjusting the beam width and direction of the antenna, the reliability and efficiency of communication can be improved while ensuring the coverage. However, how to apply it to cluster networking, especially combining the differences in intra-cluster and inter-cluster channel transmission characteristics to achieve a unified design of communication protocols, is still an urgent problem to be solved in the current wireless communication field. Summary of the invention

[0004] The purpose of the present invention is to provide a clustering networking method based on wide-beam directional communication, which integrates the application modes of two different channel transmission characteristics, intra-cluster and inter-cluster, and designs a unified MAC communication protocol to improve the coverage, transmission efficiency and system capacity of the wireless communication network in certain special application scenarios.

[0005] The technical solution adopted by the present invention is:

[0006] A clustering networking method based on wide beam directional communication includes the following processes:

[0007] Step 1: Perform cluster network planning according to cluster construction rules; divide the network into multiple clusters according to the geographical location, communication requirements and channel conditions of the devices, each cluster contains a set number of devices, one device is used as a communication node, and the antenna beam width and direction of the communication node in each cluster are planned, as well as the identity, antenna direction and topological relationship of the communication nodes between clusters are planned;

[0008] Step 2: After each communication node is powered on, the network is constructed and maintained. The topological connection between different clusters is specified based on the plan. Each communication node in the cluster uses the interactive node detection frame until the topological table of each communication node converges, and the bidirectional link is used to form the whole network topology, and the network maintenance is performed.

[0009] Step 3: Business transmission within and between clusters; the intra-cluster communication process is based on distributed link time slot reservation and transmission, and is implemented using a hybrid MAC communication protocol of CSMA and TDMA; the inter-cluster communication process is based on an asynchronous point-to-point communication method using spectrum measurement technology, and is implemented using frequency hopping anti-interference technology; when inter-cluster nodes perform intra-cluster communication and inter-cluster communication at the same time, priority queuing is performed.

[0010] Furthermore, in step 2, each communication node in the cluster uses the interactive node detection frame until the topology table of each communication node converges, takes the bidirectional link to form the whole network topology, and performs network maintenance. The specific process is as follows:

[0011] Each communication node in the cluster uses the non-continuous CSMA protocol to obtain the transmission opportunity with probability p1 within the transmission interval range T1, and sends a node detection frame carrying the current node topology table information. The neighboring node that receives the node detection frame takes the union of its own node detection frame and the received node detection frame, and continuously interacts until the topology table of each communication node converges to obtain a stable topology table, and takes the bidirectional link to form the whole network topology;

[0012] After the network is established, each communication node adopts the non-continuous CSMA protocol to obtain the opportunity to send a node detection frame with probability p2 within the sending interval range T2, and sends a node detection frame carrying the current node topology table information. The neighboring node that receives the node detection frame takes the union of its own node detection frame and the received node detection frame, and continuously interacts until the topology tables of each communication node converge to obtain a stable topology table, and sets the exit timeout time τ to delete the current node neighbor information in the topology table, so as to perform network maintenance; among them, T1, p1, T2 and p2 are all set values.

[0013] Furthermore, in step 3, the intra-cluster communication process is specifically as follows:

[0014] After a communication node generates a service transmission demand, it generates a reservation application based on traffic estimation, and then obtains the opportunity for reserved frame RF interaction with probability p4 within the transmission interval range T4 with reference to the non-continuous CSMA protocol, and competes according to the priority based on the current transmission competition queue. When the competition wins, it actually obtains the opportunity to send the reserved frame RF; then, time synchronization is performed based on the received reserved frame, and the non-continuous five-step reservation protocol FPRP is used to allocate TDMA broadcast time slots between links. During the allocation process, the receiving end filters the received reserved frames according to the established full network topology; among them, T4 and p4 are set values.

[0015] Furthermore, in step 3, the inter-cluster communication process is specifically as follows:

[0016] (1) Channel detection process: When there is a demand for inter-cluster service transmission on the planned inter-cluster link, the non-persistent CSMA protocol is used to obtain the transmission opportunity with probability p3 within the transmission interval range T3, and then a set of fixed frequency points are selected to send channel detection frames by frequency hopping; after receiving the channel detection frame, the best frequency point of the other end is used to hop to reply the channel confirmation frame to communicate the best frequency points selected by each end; at the same time, the reply channel confirmation frame carries the current transmission schedule of the receiving end. If the sending end does not receive the channel confirmation frame within the specified time, the process is repeated; T3 and p3 are set values;

[0017] (2) During the service transmission process, after receiving the channel confirmation frame, the service transmitter obtains the best receiving frequency of the receiver, and then generates a new result based on the current transmission time schedule information of the communication node of the receiver, and uses the best frequency of the receiver to hop back to the receiver; the receiver competes for priority based on the latest transmission time schedule received and the current transmission time schedule, giving priority to ensuring the needs of inter-cluster services; the timing of sending the channel confirmation frame is calculated based on the alignment of the end of the inter-cluster reserved frame and the end of the intra-cluster RF frame, so that the transmission time slots used by the inter-cluster service and the intra-cluster service are aligned to a common specific frame structure. The frame structure is the m information frames immediately following the inter-cluster reserved frame or the intra-cluster RF frame. The information frame contains multiple information time slots, which are occupied by the inter-cluster service and the intra-cluster service respectively. The transmitter uses the best frequency of the receiver to hop and transmit the service.

[0018] Furthermore, in step 3, when the inter-cluster nodes simultaneously perform intra-cluster communication and inter-cluster communication, priority queuing is performed. The specific process is as follows:

[0019] (1) Transmission priority queuing: When a communication node simultaneously participates in three independent transmission processes based on the non-continuous CSMA protocol, namely, intra-cluster node detection frames, inter-cluster channel detection frames, and reserved frames used for FPRP interaction, they are queued in the order of priority: inter-cluster channel detection frames > intra-cluster node detection frames > frames used for FPRP interaction;

[0020] (2) RS competition priority queuing at the inter-cluster receiving end. During inter-cluster communication, if the idle time slots of the transmission time arrangement fed back by the receiving end do not meet the inter-cluster communication requirements, the sending end will compete to occupy some reserved time slots to form a new transmission time arrangement application reply; after receiving the reply, the receiving end will give priority to reserving the relevant time slots for inter-cluster communication and spread the result to the communication nodes within one to two hops through the FPRP protocol;

[0021] (3) Additional conflict avoidance mechanism: According to the inter-cluster channel on-off interval, stable connectivity duration and fading characteristics, the number of information frames m in the FPRP discontinuous allocation period within the cluster and the inter-cluster protocol parameters T3 and p3 are selected to obtain the optimal parameter combination that meets the channel transmission characteristics; fixed frequency hopping is used within the cluster, and optimal frequency hopping based on spectrum measurement is used between clusters.

[0022] The advantages of the present invention compared with the prior art are:

[0023] 1. The unified design of the equipment can integrate two different application scenarios based on wide-beam directional communication using a clustered network architecture, thereby expanding the coverage of the wireless communication network and meeting the needs of certain special application scenarios.

[0024] 2. The unified design of the MAC communication protocol fully considers the differences and characteristics of the channel transmission characteristics of the two application scenarios, facilitates the clustering construction and design of wireless networks, and provides an effective solution example for the integration of some existing wireless networks with similar characteristics.

[0025] 3. Combining the advantages of mature protocols such as CSMA and FPRP, as well as time division and frequency division, we design a conflict avoidance mechanism to effectively improve the transmission efficiency and system capacity of wireless communication networks. Introduce frequency hopping technology and spectrum measurement technology to adapt to differentiated channel transmission characteristics, improve link anti-interference capabilities, and increase the robustness and stability of wireless communication networks. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the time slot structure of the MAC communication protocol of the present invention.

[0027] Figure 2 It is a flow chart of the network construction phase of the present invention.

[0028] Figure 3 It is a flow chart of the network working phase of the present invention.

[0029] Figure 4 It is a schematic diagram of the sending priority queuing of the present invention.

[0030] Figure 5 It is a schematic diagram of an application scenario of an embodiment of the present invention.

[0031] Figure 6 It is a schematic diagram of a topological matrix of an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings and examples.

[0033] Step 1: Perform cluster network planning according to cluster construction rules. Divide the network into multiple clusters based on the geographical location, communication requirements, and channel conditions of the devices. Each cluster contains a set number of devices, and one device serves as a communication node. Plan the antenna beam width and direction of each communication node in each cluster, and plan the identity of the communication nodes between clusters, the antenna direction, and the bidirectional topological relationship between clusters.

[0034] Step 2: After each communication node is powered on, the network is constructed and maintained. The inter-cluster communication nodes plan the antenna direction in advance to ensure the bidirectional topological relationship between clusters. The cluster will use the protocol automatic networking method to establish and maintain the network.

[0035] Since the geographical location, communication requirements, and channel conditions of the devices in the application scenarios involved in the present invention are all based on pre-planning, the communication node positions do not move during network operation, and the antenna directions are fixed. In order to speed up network construction, the network is divided into a network construction phase and a network working phase in terms of time, corresponding to network establishment and maintenance, respectively. Both rely on the stability of the network topology as an automatic switching condition. Compared with the network construction phase, the network working phase still provides new communication node access and exit functions, but the convergence speed is slower than that of the network construction phase.

[0036] The network is established using the non-continuous CSMA protocol to obtain broadcast transmission opportunities and establish a network topology table. Figure 1 See the Establishing Connections section.

[0037] like Figure 2 As shown in the figure, the communication node workflow in the network construction phase includes the following steps:

[0038] Step 2-1: After the communication node is powered on, it enters the multi-channel carrier sensing sub-process to determine whether the current channel is idle.

[0039] Step 2-2: If idle, obtain the opportunity to send the node detection frame according to the parameters T1 and p1, and write the neighbor information and topology table currently maintained locally into the node detection frame broadcast.

[0040] Step 2-3, if it is not idle, multi-channel receiving determines whether it is a node detection frame, if not discards it, if so, adds the receiving source node neighbor information to the local maintenance neighbor information and topology table and updates the topology table.

[0041] Step 2-4, a timer is maintained from the moment the neighbor information is added. If the timer does not time out, the neighbor information is received again and the timer is reset. If the timer times out, the neighbor information and the related topology information are deleted.

[0042] After running in this way for a period of time, the topology of the entire network will converge and stabilize, and then switch to the network working stage. In this stage, business transmission can be carried out while the network is maintained.

[0043] Network maintenance uses the non-continuous CSMA protocol to obtain broadcast transmission opportunities and maintain the network topology table. Figure 1 See the Maintenance Connections section.

[0044] like Figure 3 As shown, the workflow of the communication node regarding network maintenance during the network working phase includes the following steps:

[0045] Step 2-5, after switching to the network working phase, the communication node enters the multi-channel carrier sensing sub-process to determine whether the current channel is idle.

[0046] Step 2-6, if idle, enter the sending priority competition sub-process to queue (such as Figure 4 As shown), if the maintenance queue competition wins, a channel detection frame is sent and the multi-channel carrier sensing sub-process is returned.

[0047] Step 2-7, if not idle, receive information, if the purpose is not to discard it, if so, and receive the node detection frame, enter the network maintenance sub-process, which includes the same steps as steps 2-3 and 2-4, and return to the multi-channel carrier sensing sub-process after completion.

[0048] Step 3: Business transmission is performed within and between clusters.

[0049] The intra-cluster communication process includes intra-cluster link time slot reservation and transmission, which is implemented using a hybrid MAC communication protocol of CSMA and TDMA. The first part uses a non-continuous CSMA protocol to replace the time synchronization of the entire network, and asynchronously communicates with adjacent nodes on demand for local synchronization. The second part uses the FPRP protocol to compete for time slots for service transmission. Figure 1 The intra-cluster link time slot reservation and transmission section is shown in FIG.

[0050] The inter-cluster communication process includes inter-cluster channel detection and service transmission, which is implemented by frequency hopping anti-interference technology and asynchronous point-to-point communication based on spectrum measurement technology. The non-continuous CSMA protocol is used to randomly detect the channel quality. If the channel is unobstructed, the channel quality is confirmed by aligning the local synchronization with the destination cluster. The sender reserves the application for acceptance and no longer rejects it, which reduces the number of channel interactions and leaves more stable transmission time for the service. Figure 1 The inter-cluster channel detection and service transmission section is shown in the figure.

[0051] When cluster nodes communicate within and between clusters at the same time, priority queuing is performed. The specific process includes three parts. First, when there are multiple simultaneous transmission opportunities in the sending competition queue, the queues are arranged in the order of priority of inter-cluster channel detection frames> intra-cluster node detection frames> frames used for FPRP interaction. Second, the RS competition priority queuing is performed at the inter-cluster receiving end. When the intra-cluster and inter-cluster nodes compete for time slots at the same time, the relevant time slots are reserved for the inter-cluster nodes first. Third, an additional conflict avoidance mechanism is introduced. According to the inter-cluster channel on-off interval, stable connectivity duration and fading characteristics, the number of information frames IF m in the intra-cluster FPRP discontinuous allocation period and the inter-cluster protocol parameters T3 and p3 are reasonably selected to obtain the best parameter combination that meets the channel transmission characteristics; fixed frequency hopping is used within the cluster, and the best frequency hopping based on spectrum measurement is used between clusters.

[0052] like Figure 3 As shown, the workflow of intra-cluster and inter-cluster service transmission of communication nodes in the network working phase includes the following steps:

[0053] Step 3-1, after switching to the network working phase, the communication node enters the multi-channel carrier sensing sub-process to determine whether the current channel is idle.

[0054] Step 3-2, if idle, enter the sending priority competition sub-process to queue (such as Figure 4 As shown), if a queue that meets the conditions wins the competition, different frames are sent according to the two different types of inter-cluster and intra-cluster and enter the corresponding interaction sub-process. After the interaction is completed, it returns to the multi-channel carrier sensing sub-process.

[0055] Step 3-3, if not idle, receive information, if the purpose is not to discard it, if so, enter different sub-processes according to the type of frame received. If a reservation request packet RR is received, enter the FPRP interaction process, and return to the multi-channel carrier sensing sub-process after completion; if a channel detection frame is received, calculate and delay to synchronize the inter-cluster and intra-cluster IF, and enter the channel confirmation and transmission sub-process, and return to the multi-channel carrier sensing sub-process after completion.

[0056] The following is a specific embodiment:

[0057] exist Figure 5In the application scenario shown, Cluster 1 contains four communication nodes A1, B1, C1, and D1, and Cluster 2 contains A2 and several other communication nodes. The dotted lines represent the antenna beam ranges of each communication node. Communication nodes within the wide beam range in the cluster can receive its transmission information. Communication nodes within the wide beam range between clusters have a probability of receiving its transmission information within a certain period according to the channel transmission characteristics. The solid lines represent the theoretical network topology A2 - A1 - (B1) / (C1 - D1) constructed according to the method of the present invention, where A2 - A1 is based on prior planning, and A1 - (B1) / (C1 - D1) is dynamically constructed within the cluster. The topological connection relationship is represented by a 4×4 matrix. The lower triangle represents the receiving direction, and the upper triangle represents the transmitting direction. 1 represents a connection, and 0 represents no connection. Then the finally converged full-network topology table is as Figure 6 shown in (1). The full-network topology table of the bidirectional link obtained by symmetrically taking the intersection of the upper and lower triangles is as Figure 6 shown in (2), which is consistent with the theoretical topology.

[0058] During the network working stage, taking the example that there is a one-way service requirement for A2 - A1 and A1 - C1, the MAC protocol interaction process includes the following steps:

[0059] A2:

[0060] Step 1, carrier sensing. If the channel is idle, randomly select a fixed frequency point for frequency hopping at a random time and send a channel detection frame to A1.

[0061] Step 2, if the channel confirmation frame is not received within the specified time th, re-perform carrier sensing.

[0062] Step 3, if the channel confirmation frame is received within the specified time th, select n idle time slots from N ISs for reservation. Assume the first n (n < N) of them, put the result in the reservation application frame and send it to A1, and then occupy the first n IS time slots in the IF according to the m×IF time slot structure for service transmission.

[0063] A1:

[0064] Step 1, carrier sensing. If the channel is idle, randomly select a fixed frequency point for frequency hopping at a random time and send the first RR to start the FPRP interaction process to complete service transmission to C1.

[0065] Step 2, if the channel is busy, after receiving the channel detection frame, parse the best frequency point of the peer end, calculate the next IF position for synchronization alignment, select the best frequency point for frequency hopping at the specified time and send a channel confirmation frame to A2, start the inter-cluster interaction process, and complete the inter-cluster and intra-cluster service transmissions together with the intra-cluster interaction process.

[0066] In summary, the present invention integrates two different application scenarios based on wide-beam directional communication through the steps of cluster construction, network establishment and maintenance, intra-cluster and inter-cluster service transmission, etc., combines the advantages of mature protocols such as CSMA and FPRP, adopts time division and frequency division to design a conflict avoidance mechanism, introduces frequency hopping technology and spectrum measurement technology, adapts to differentiated channel transmission characteristics, and ultimately increases network coverage, robustness and stability in special application scenarios, and effectively improves the transmission efficiency and system capacity of the network.

Claims

1. A cluster networking method based on wide beam directional communication, characterized in that: The process includes: Step 1: Perform cluster network planning according to cluster construction rules; divide the network into multiple clusters according to the geographical location, communication requirements and channel conditions of the devices, each cluster contains a set number of devices, one device is used as a communication node, and the antenna beam width and direction of the communication node in each cluster are planned, as well as the identity, antenna direction and topological relationship of the communication nodes between clusters are planned; Step 2: After each communication node is powered on, the network is constructed and maintained. The topological connection between different clusters is specified based on the plan. Each communication node in the cluster uses the interactive node detection frame until the topological table of each communication node converges, and the bidirectional link is used to form the whole network topology, and the network maintenance is performed. Step 3: Business transmission within and between clusters; the intra-cluster communication process is based on distributed link time slot reservation and transmission, and is implemented using a hybrid MAC communication protocol of CSMA and TDMA; the inter-cluster communication process is based on an asynchronous point-to-point communication method using spectrum measurement technology, and is implemented using frequency hopping anti-interference technology; when inter-cluster nodes perform intra-cluster communication and inter-cluster communication at the same time, priority queuing is performed.

2. A cluster networking method based on wide beam directional communication according to claim 1, characterized in that: In step 2, each communication node in the cluster uses the interactive node detection frame until the topology table of each communication node converges, takes the bidirectional link to form the whole network topology, and performs network maintenance. The specific process is as follows: Each communication node in the cluster uses the non-continuous CSMA protocol to obtain the transmission opportunity with probability p1 within the transmission interval range T1, and sends a node detection frame carrying the current node topology table information. The neighboring node that receives the node detection frame takes the union of its own node detection frame and the received node detection frame, and continuously interacts until the topology table of each communication node converges to obtain a stable topology table, and takes the bidirectional link to form the whole network topology; After the network is established, each communication node adopts the non-continuous CSMA protocol to obtain the opportunity to send a node detection frame with probability p2 within the sending interval range T2, and sends a node detection frame carrying the current node topology table information. The neighboring node that receives the node detection frame takes the union of its own node detection frame and the received node detection frame, and continuously interacts until the topology tables of each communication node converge to obtain a stable topology table, and sets the exit timeout time τ to delete the current node neighbor information in the topology table, so as to perform network maintenance; among them, T1, p1, T2 and p2 are all set values.

3. The cluster networking method based on wide beam directional communication according to claim 2, characterized in that: In step 3, the intra-cluster communication process is specifically as follows: After a communication node generates a service transmission demand, it generates a reservation application based on traffic estimation, and then obtains the opportunity for reserved frame RF interaction with probability p4 within the transmission interval range T4 with reference to the non-continuous CSMA protocol, and competes according to the priority based on the current transmission competition queue. When the competition wins, it actually obtains the opportunity to send the reserved frame RF; then, time synchronization is performed based on the received reserved frame, and the non-continuous five-step reservation protocol FPRP is used to allocate TDMA broadcast time slots between links. During the allocation process, the receiving end filters the received reserved frames according to the established full network topology; among them, T4 and p4 are set values.

4. The cluster networking method based on wide beam directional communication according to claim 3, characterized in that: In step 3, the inter-cluster communication process is specifically as follows: (1) Channel detection process: When there is a demand for inter-cluster service transmission on the planned inter-cluster link, the non-persistent CSMA protocol is used to obtain the transmission opportunity with probability p3 within the transmission interval range T3, and then a set of fixed frequency points are selected to send channel detection frames by frequency hopping; after receiving the channel detection frame, the best frequency point of the other end is used to hop to reply the channel confirmation frame to communicate the best frequency points selected by each end; at the same time, the reply channel confirmation frame carries the current transmission schedule of the receiving end. If the sending end does not receive the channel confirmation frame within the specified time, the process is repeated; T3 and p3 are set values; (2) During the service transmission process, after receiving the channel confirmation frame, the service transmitter obtains the best receiving frequency of the receiver, and then generates a new result based on the current transmission time schedule information of the communication node of the receiver, and uses the best frequency of the receiver to hop back to the receiver; the receiver competes for priority based on the latest transmission time schedule received and the current transmission time schedule, giving priority to ensuring the needs of inter-cluster services; the timing of sending the channel confirmation frame is calculated based on the alignment of the end of the inter-cluster reserved frame and the end of the intra-cluster RF frame, so that the transmission time slots used by the inter-cluster service and the intra-cluster service are aligned to a common specific frame structure. The frame structure is the m information frames immediately following the inter-cluster reserved frame or the intra-cluster RF frame. The information frame contains multiple information time slots, which are occupied by the inter-cluster service and the intra-cluster service respectively. The transmitter uses the best frequency of the receiver to hop and transmit the service.

5. The cluster networking method based on wide beam directional communication according to claim 4, characterized in that: In step 3, when cluster nodes perform intra-cluster communication and inter-cluster communication at the same time, priority queuing is performed. The specific process is as follows: (1) Transmission priority queuing: When a communication node simultaneously participates in three independent transmission processes based on the non-continuous CSMA protocol, namely, intra-cluster node detection frames, inter-cluster channel detection frames, and reserved frames used for FPRP interaction, they are queued in the order of priority: inter-cluster channel detection frames > intra-cluster node detection frames > frames used for FPRP interaction; (2) RS competition priority queuing at the inter-cluster receiving end. During inter-cluster communication, if the idle time slots of the transmission time arrangement fed back by the receiving end do not meet the inter-cluster communication requirements, the sending end will compete to occupy some reserved time slots to form a new transmission time arrangement application reply; after receiving the reply, the receiving end will give priority to reserving the relevant time slots for inter-cluster communication and spread the result to the communication nodes within one to two hops through the FPRP protocol; (3) Additional conflict avoidance mechanism: According to the inter-cluster channel on-off interval, stable connectivity duration and fading characteristics, the number of information frames m in the FPRP discontinuous allocation period within the cluster and the inter-cluster protocol parameters T3 and p3 are selected to obtain the optimal parameter combination that meets the channel transmission characteristics; fixed frequency hopping is used within the cluster, and optimal frequency hopping based on spectrum measurement is used between clusters.

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