In this embodiment, a suitable spreading factor is selected according to the detected value of the network quality parameter, and then the communication speed is adjusted according to the selected spreading factor, so that the communication speed can adapt to the current network state.

Preferably, the network quality parameters include signal strength, signal delay and channel occupancy, and the communication parameters include a transmission frequency band, a spreading factor, a communication speed and a routing path.

Preferably, a handshake protocol is established between the sending node and the receiving node, specifically:

the sending node sends the request sending frame to the receiving node;

and the receiving node sends the transmission permission frame to the sending node after receiving the request transmission frame, so as to realize the establishment of a handshake protocol.

A handshake protocol is established between the sending node and the receiving node by requesting transmission of frames and permitting transmission and reception of frames. Meanwhile, the self-adaptive adjustment of the network parameters is realized by means of the process of establishing a handshake protocol, so that the communication efficiency between the sending node and the receiving node is higher, and the communication effect is better.

Preferably, the selecting the communication parameter value according to the detected value of the network quality parameter specifically comprises:

establishing a mapping relation table among communication distance, network quality parameters and communication parameters;

and acquiring the real-time communication distance between the sending node and the receiving node, and selecting corresponding communication parameter values in the mapping relation table according to the real-time communication distance and the network quality parameter detection values.

The mapping relationship table established in this embodiment is as follows:

TABLE 2 mapping relationship between communication distance and signal strength, spreading factor, data rate

And selecting proper communication parameters for the communication between the sending node and the receiving node according to the current network condition and the communication distance. The communication quality between the sending node and the receiving node is ensured, and meanwhile, the antenna is not required to be arranged, so that the power consumption is low.

establishing the handshake protocol on a common channel;

reallocating the communication channel after the handshake protocol is established;

communication is performed on the reallocated communication channel.

The handshake protocol is established directly on the common channel since it does not require too high a network quality to be established. After the handshake protocol is established and the communication parameters are adjusted, the communication is switched to a more appropriate channel for subsequent formal communication, and the processes of data frame sending, ship identification and the like are carried out.

Preferably, the reallocating the communication channel after the handshake protocol is established is specifically:

setting an initial channel allocation scheme;

calculating the interference amount of the current channel allocation scheme according to the utility function;

and judging whether the current channel allocation scheme can reach an equilibrium state or not according to the interference amount, if so, adopting the current channel allocation scheme for communication, otherwise, switching to the next channel allocation scheme, and turning to the previous step.

The preferred embodiment performs adaptive adjustment on the communication channel on the basis of adjusting the communication parameters, and solves the problem of VHF channel congestion of the AIS equipment at present.

Specifically, the available frequency band in this embodiment is 470-510MHz, which needs to be monitored by the radio management committee, and is increased from 470.3MHz to 509.7MHz every 200KHz, and 144 channels are total, wherein channels No. 6-38 and No. 45-77 are used for china power usage, and are not available in ship identification, and the remaining 78 channels are available. Due to the fact that network resources are limited, the number of ships is large, communication data packets are dense, all ship nodes adopt a spectrum allocation model based on a game theory to conduct channel self-adaptive allocation, whether a utility function can reach an equilibrium state is calculated at a sending node, if yes, channel allocation is conducted according to the strategy, if not, the next channel is continuously switched to, and a channel allocation strategy which can reach the equilibrium state is searched. And after the channel allocation strategy which can reach the equilibrium state is found and the data frame communication is completed, returning to the initial allocation channel again, and waiting for the next time of communication needing to be carried out, carrying out channel self-adaptive allocation.

Preferably, the calculating the interference amount of the current channel allocation scheme according to the utility function specifically includes:

wherein, U_i() As a utility function, P_kIs a node s_kK is equal to [1, n ]]N is the total number of nodes, G_kjIs a node s_kTo node s_jI () is an interference equation, which means that when a node receives and transmits data, interference occurs using the same channel;

the interference equation is:

the link gain is:

wherein d is_ijIs a node s_kAnd node s_jThe communication distance of (2).

The purpose of channel adaptive allocation is to minimize the interference amount, and the implementation adopts a utility function of a spectrum allocation model based on a game theory to calculate the overall interference amount of the current allocation strategy of the system. And a frequency spectrum allocation model based on a game theory is adopted, so that the channel utilization rate and the throughput of the system are improved. The problem that the existing AIS equipment channel is not enough is solved.

Judging whether the current channel allocation scheme can reach an equilibrium state according to the interference amount, specifically:

and judging whether the interference amount is smaller than a set threshold value, if so, indicating that the balance state can be achieved, otherwise, indicating that the balance state cannot be achieved.

Example 2

As shown in fig. 2, an embodiment 2 of the present invention provides a network adaptive device for ship communication, which includes a processor and a memory, where the memory stores a computer program, and the computer program is executed by the processor to implement the network adaptive method for ship communication provided inembodiment 1.

Specifically, the network adaptive device for ship communication further comprises a wireless communication module, a display screen, an SD card, a sensor and the like. The wireless communication module is used for establishing communication connection so as to realize a network self-adaptive method of ship communication. The wireless communication module can adopt loRa communication module to realize, and loRa communication module has point-to-point data bidirectional transmission function, is used for the sending and receiving of data respectively. The various sensors are used for acquiring position information, navigation speed information, course information and motion information of the ship, for example, the position information and the navigation speed information can be detected by a GPS module, the course information can be detected by a compass sensor, the motion information can be detected by an acceleration sensor, whether the ship is in a navigation state or not can be judged according to the motion information of the ship, and data detected by the sensors are sent as data frames, so that mutual identification among network self-adaption devices of different ship communication is realized. The display screen is used for displaying detection data, identification results and the like. The SD card is used for storing ship navigation information, and ship static information is stored in the SD card module and comprises a ship identification number, a ship length, a ship width, a ship type, ship draft and the like.

The network adaptive device for ship communication provided by the embodiment of the invention is used for realizing a network adaptive method for ship communication, so that the technical effect of the network adaptive method for ship communication is achieved, and the network adaptive device for ship communication also has the technical effect, and the details are not repeated herein.

Example 3

As shown in fig. 3, an embodiment 3 of the present invention provides a network adaptive system for ship communication, including at least two network adaptive devices for ship communication provided in embodiment 2, and further including a base station, where the network adaptive devices for ship communication implement mutual communication by using the network adaptive method for ship communication provided inembodiment 1, and the network adaptive devices for ship communication implement mutual communication with the base station by using the network adaptive method for ship communication provided inembodiment 1.

Fig. 3 shows six ship communication network adaptive devices, and obviously, the number of the network adaptive devices may be other, a base station is not shown in fig. 3, two ship communication network adaptive devices may communicate with each other by using the ship communication network adaptive method provided inembodiment 1, the ship communication network adaptive devices and the base station may communicate with each other by using the ship communication network adaptive method provided inembodiment 1, and the communication quality is good, and arrows in fig. 3 only show some communication connection possibilities. All network-adapted devices communicating with the vessel are connected by wireless communication, such as LoRa. The ship user can send the ship data to the network self-adaptive device for communication of other ships in the communication range through the network self-adaptive device for communication of the ships, and can also forward the data of other ships. The wireless communication module adopts a network self-adaptive method of ship communication to detect the network state of the system before sending data, and automatically selects an optimal communication path, a communication channel and the like according to the network state.

The network adaptive system for ship communication provided by the embodiment of the invention comprises a network adaptive device for ship communication, and the network adaptive device for ship communication is used for communication by adopting a network adaptive method for ship communication, so that the technical effect of the network adaptive method for ship communication is achieved, and the network adaptive system for ship communication is also achieved, and the details are not repeated herein.

The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims

Translated fromChinese

1.一种船舶通信的网络自适应方法，其特征在于，包括以下步骤：1. a network adaptive method for ship communication, is characterized in that, comprises the following steps:

在发送节点与接收节点之间建立握手协议；Establish a handshake protocol between the sending node and the receiving node;

根据所述握手协议的请求发送帧检测网络质量参数，根据网络质量参数检测值选择通信参数值；According to the request of the handshake protocol, the frame is sent to detect the network quality parameter, and the communication parameter value is selected according to the detected value of the network quality parameter;

根据所述握手协议的允许发送帧发送所述通信参数值，按所述通信参数值进行通信参数调整；Send the communication parameter value according to the allowable sending frame of the handshake protocol, and adjust the communication parameter according to the communication parameter value;

按调整后的通信参数发送数据帧实现通信；Send data frames according to the adjusted communication parameters to realize communication;

所述请求发送帧包括帧头、船舶识别码、请求发送数据以及帧尾；所述允许发送帧包括帧头、船舶识别码、允许发送数据、帧尾以及通信参数；The request-to-send frame includes frame header, ship identification code, request-to-send data, and frame trailer; the allow-to-send frame includes frame header, ship identification code, permitted-to-send data, frame trailer, and communication parameters;

所述网络质量参数包括信号强度、信号时延以及信道占用率，所述通信参数包括发送频段、扩频因子、通信速度以及路由路径；The network quality parameters include signal strength, signal delay and channel occupancy, and the communication parameters include transmission frequency band, spreading factor, communication speed and routing path;

在发送节点与接收节点之间建立握手协议，具体为：A handshake protocol is established between the sending node and the receiving node, specifically:

在公共信道上建立所述握手协议；establishing the handshake protocol on a common channel;

握手协议建立完成后重新分配通信信道；After the handshake protocol is established, the communication channel is reassigned;

在重新分配的通信信道进行通信；communicate on reassigned communication channels;

握手协议建立完成后重新分配通信信道，具体为：After the handshake protocol is established, the communication channel is reassigned, specifically:

设置初始信道分配方案；Set the initial channel allocation scheme;

根据效用函数计算当前信道分配方案的干扰量；Calculate the interference amount of the current channel allocation scheme according to the utility function;

根据所述干扰量判断当前信道分配方案能否达到均衡状态，如果能，则采用当前信道分配方案进行通信，否则切换至下一个信道分配方案，并转上一步；Determine whether the current channel allocation scheme can reach an equilibrium state according to the interference amount, if so, use the current channel allocation scheme for communication, otherwise switch to the next channel allocation scheme, and go to the previous step;

根据效用函数计算当前信道分配方案的干扰量，具体为：Calculate the interference amount of the current channel allocation scheme according to the utility function, specifically:

其中，U_i()为效用函数，P_k为节点s_k的发射功率，k∈[1,n]，n为节点总数量，G_kj为节点s_k到节点s_j的链路增益，I()为干扰方程，表示当节点收发数据时使用同一信道则会产生干扰；Among them, U_i () is the utility function, P_k is the transmit power of node s_k , k∈[1,n], n is the total number of nodes, G_kj is the link gain from node s_k to node s_j , I () is the interference equation, which means that interference will occur when nodes use the same channel to send and receive data;

所述干扰方程为：The interference equation is:

所述链路增益为：The link gain is:

其中，d_ij为节点s_k与节点s_j的通信距离。Among them, d_ij is the communication distance between node_sk and node s_j .

2.根据权利要求1所述的船舶通信的网络自适应方法，其特征在于，按所述通信参数值进行通信参数调整，具体为：2. the network adaptive method of ship communication according to claim 1, is characterized in that, carries out communication parameter adjustment according to described communication parameter value, is specially:

所述通信参数值为扩频因子，根据所述扩频因子对通信速度进行调整。The communication parameter value is a spreading factor, and the communication speed is adjusted according to the spreading factor.

3.根据权利要求1所述的船舶通信的网络自适应方法，其特征在于，在发送节点与接收节点之间建立握手协议，具体为：3. the network adaptive method of ship communication according to claim 1, is characterized in that, establishes a handshake agreement between sending node and receiving node, is specially:

发送节点向接收节点发送所述请求发送帧；The sending node sends the request to send frame to the receiving node;

接收节点接收到所述请求发送帧后向所述发送节点发送所述允许发送帧，实现握手协议的建立。After receiving the request-to-send frame, the receiving node sends the allow-to-send frame to the sending node to implement the establishment of a handshake protocol.

4.根据权利要求1所述的船舶通信的网络自适应方法，其特征在于，根据网络质量参数检测值选择通信参数值，具体为：4. the network adaptive method of ship communication according to claim 1, is characterized in that, selects communication parameter value according to network quality parameter detection value, is specially:

建立通信距离、网络质量参数以及通信参数之间的映射关系表；Establish a mapping relationship table between communication distance, network quality parameters and communication parameters;

获取发送节点与接收节点之间的实时通信距离，根据所述实时通信距离、网络质量参数检测值在所述映射关系表中选择相应的通信参数值。Obtain the real-time communication distance between the sending node and the receiving node, and select the corresponding communication parameter value in the mapping relationship table according to the real-time communication distance and the detection value of the network quality parameter.

5.一种船舶通信的网络自适应装置，其特征在于，包括处理器以及存储器，所述存储器上存储有计算机程序，所述计算机程序被所述处理器执行时，实现如权利要求1-4任一所述的船舶通信的网络自适应方法。5. A network adaptive device for ship communication, characterized in that it comprises a processor and a memory, and a computer program is stored on the memory, and when the computer program is executed by the processor, it is realized as claimed in claims 1-4 Any of the network adaptation methods for ship communication.

6.一种船舶通信的网络自适应系统，其特征在于，包括至少两个如权利要求5所述的船舶通信的网络自适应装置，还包括基站，各所述船舶通信的网络自适应装置之间采用如权利要求1-4任一所述的船舶通信的网络自适应方法实现相互通信，各所述船舶通信的网络自适应装置与所述基站之间采用如权利要求1-4任一所述的船舶通信的网络自适应方法实现相互通信。6. A network adaptive system for ship communication, characterized in that it comprises at least two network adaptive devices for ship communication as claimed in claim 5, and also includes a base station, wherein one of the network adaptive devices for each described ship communication The network adaptation method for ship communication according to any one of claims 1-4 is used to realize mutual communication, and the network adaptation device for communication between each ship and the base station adopts the method according to any one of claims 1-4. The network adaptive method for ship communication described above realizes mutual communication.