WO2017219476A1 - Data transmission method and apparatus - Google Patents

Abstract

Disclosed is a data transmission method. The method comprises: receiving data packets sent by a service initiating device in an originating node, and obtaining a service priority of each data packet and a destination node; looking for wireless links from the originating node to the destination node according to a preconfigured routing table of the originating node, and obtaining link quality of each wireless link; allocating the wireless links to the data packets according to the service priorities of the data packets and the link quality of the wireless links; and separately sending the data packets to the destination node by means of the allocated wireless links. Also disclosed is a data transmission apparatus. The present invention implements simultaneous data transmission between two nodes by means of multiple links, and significantly improves the utilization rate of link resources and data transmission efficiency between the nodes.

Description

 Data transmission method and device

Technical field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.

Background technique

In the mobile communication scenario, mobile nodes such as ships and communication vehicles communicate with fixed nodes through satellite, short-wave, scattering, microwave and other communication means. Since the current wireless communication method has only one between the fixed node and the mobile node at the same time. The wireless link is active and in operation, resulting in very low radio link resource utilization and severely limited application data transmission.

Therefore, current wireless communication data transmission efficiency is low.

Summary of the invention

The main object of the present invention is to provide a data transmission method and apparatus, aiming at solving the technical problem of low efficiency of wireless communication data transmission.

To achieve the above object, the present invention provides a data transmission method, the data transmission method comprising the following steps:

Receiving each data packet sent by the service initiating device in the originating node, and acquiring a service priority and a destination node of each data packet;

Obtaining, according to the pre-configured routing table of the originating node, each radio link that the originating node reaches the destination node, and acquiring link quality of each radio link;

Allocating a wireless link to each data packet according to a service priority of each data packet and a link quality of each wireless link;

Each of the data packets is sent to the destination node through an allocated wireless link.

In addition, in order to achieve the above object, the present invention further provides a data transmission apparatus, where the data transmission apparatus includes:

a receiving module, configured to receive each data packet sent by the service initiating device in the originating node, and obtain a service priority and a destination node of each data packet;

a querying module, configured to search, according to a pre-configured routing table of the originating node, each radio link that the originating node reaches the destination node, and obtain link quality of each radio link;

An allocating module, configured to allocate a wireless link to each data packet according to a service priority of each data packet and a link quality of each wireless link;

And a sending module, configured to send each of the data packets to the destination node by using an allocated wireless link.

A data transmission method and apparatus according to an embodiment of the present invention obtains a service priority and a destination node of each data packet after receiving each data packet sent by the service initiation device in the originating node; and then, according to the pre-configured route The table finds each radio link from the originating node to the destination node, and acquires the link quality of each radio link, thereby obtaining the link quality of each radio link and each radio link from the originating node to the destination node. Then, according to the service priority of each data packet and the link quality of each wireless link, a wireless link is allocated for each data packet; after the wireless link allocated for each data packet is obtained, each data packet is allocated through each data packet. The wireless link transmits each data packet, and realizes simultaneous transmission of data by multiple links between two nodes, which greatly improves the utilization of link resources and the data transmission efficiency between nodes.

DRAWINGS

1 is a schematic flow chart of a first embodiment of a data transmission method according to the present invention;

2 is a schematic diagram of functional modules of a first embodiment of a data transmission apparatus according to the present invention;

3 is a schematic diagram of a networking relationship according to an embodiment of the present invention;

4 is a schematic structural diagram of a packet according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a data transmission application scenario according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a routing table configuration application scenario according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a neighboring node detection application scenario according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a link notification application scenario according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a data flow control application scenario according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of an application scenario for data transmission between nodes according to an embodiment of the present invention.

The object, features, and advantages of the invention will be further described in conjunction with the embodiments.

detailed description

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to FIG. 1, a first embodiment of a data transmission method of the present invention provides a data transmission method, where the data transmission method includes:

Step S10: Receive each data packet sent by the service initiating device in the originating node, and obtain a service priority and a destination node of each data packet.

The invention performs comprehensive access, interconnection control and intelligent networking of various wired and wireless communication means and devices through the network interconnection control device; the control data is simultaneously transmitted on multiple transmission links, and the IP data is realized on the wireless transmission link. End-to-end transmission, improve transmission efficiency and improve resource utilization.

The networking relationship of the network interconnection control device is shown in FIG. 3. The network interconnection control device is configured between the node and the subnet, and is used for integrated access, interconnection control, and intelligent networking among various wired and wireless heterogeneous networks. Among them, each node can be connected by multiple means such as wired or wireless; each subnet is connected through a wireless network, so each subnet can also be called a wireless subnet; each node can include one or more services. Initiating devices, such as terminals, servers, or other devices, for transmitting, receiving, and processing data packets. In this embodiment, the internal connection of the node is a wired connection, and the wireless connection between the subnets is exemplified. Then, the network interconnection control device is located between the wired side and the wireless side, the wired side is inside the node, and the wireless side is between the subnets.

First, the network interconnection control device receives the data packet sent by the service initiating device in the originating node, and acquires the priority and destination node of the data packet. It should be noted that, in this embodiment, there may be one or more data packets. When there are multiple data packets, the present embodiment exemplifies the destination nodes of multiple data packets as the same node. When the destination nodes of the multiple data packets are different, the data packets may be grouped according to the destination node, and the data packets of the same destination node are in the same group, and are respectively sent by using the method in the embodiment of the present invention to improve data. Sending efficiency.

Specifically, as an implementation manner, a service priority policy of a data packet is pre-configured, for example, the service priority of the data packet is divided into eight levels, including 0 level, 1 level, 2 levels, 3 levels, 4 levels, and 5 levels. Level, Level 6, and Level 7. Among them, level 0 has the highest priority and level 7 has the lowest priority.

Then, when the service initiating device performs the service data encapsulation, the IP data is based on the priority of the service data. Protocol, the protocol for interconnecting between networks. The ToS (Type of server) field in the packet header fills in the corresponding priority number.

Referring to FIG. 4, an IPV4 message is used as an example. The message includes Version (version), header Length (header length), ToS, Len (Total Length, total length of IP packets), ID (Identifier, identifier), Offset (offset), TTL (Time To Live, time to live, Proto (Protocol), Header Checksum, IP-SA (IP Source) Address, IP source address), IP-DA (IP Destination Address), Data.

The ToS field of the IP packet is 1 byte, and the IP of the ToS field is utilized. The Precedence three bits divide the different data into eight levels.

When each data packet sent by the service initiating device arrives at the network interconnection control device, the network interconnection control device may distinguish the data packets of different priorities according to the preset policy. Thereby, the network interconnection control device acquires the service priority and the destination node of each data packet.

Step S20: Search, according to a pre-configured routing table of the originating node, each radio link that the originating node reaches the destination node, and obtain link quality of each radio link.

After acquiring the destination node of the data packet, the network interconnection control device searches for each wireless link from the originating node to the destination node according to the routing table of the pre-configured originating node.

It should be noted that the present invention collects routing information of each node's wired link and wireless link through a network interconnection control device, configures a routing table of each node, and shields access to each subnet and channel transmission device in the current communication system. The difference ensures the smooth communication network and realizes the efficient transmission of data between subnets. The routing information of the originating node to other nodes is recorded in the routing table of the originating node.

After obtaining the radio links from the originating node to the destination node according to the routing table, the network interconnection control device acquires the link quality of each radio link, that is, QoS (Quality of Service, quality of service). The link quality of each radio link is calculated based on preset weights by information such as link bandwidth, transmission quality, availability, throughput, delay, and delay variation (including jitter and drift) of each radio link. The weight value can be used for characterization.

Step S30: Allocating a wireless link to each data packet according to the service priority of each data packet and the link quality of each wireless link.

Step S40: Send each data packet to the destination node through an allocated wireless link.

After obtaining the service priority of each data packet and the link quality of each wireless link from the originating node to the destination node, the network interconnection control device selects the wireless link to transmit each data packet to the destination node.

As an implementation manner, the network interconnection control apparatus allocates corresponding radio links in priority order for data packets of different service priorities. Specifically, the network interconnection control device allocates a high-quality wireless link to a data packet with a high priority of service according to a quality level of each wireless link in the routing table from the originating node to the destination node, and the wireless quality is second. The link is assigned to a packet with a lower priority. Then, the network interconnection control device sends the data packet with no high priority to the destination node through the allocated high quality wireless link, and sends the data packet with the lower priority of the service to the wireless link of the assigned quality second. Destination node.

Further, when multiple data packets destined for the same destination node and having the same service priority arrive at the network interconnection control device at the same time, the first-to-first-first service is used for forwarding, that is, the high-quality wireless link is preferentially assigned to the first. The arriving data packet assigns the second-quality wireless link to the later arriving data packet. Then, the first arriving data packet is sent to the destination node through the allocated high quality wireless link, and the later arrived data packet is sent to the destination node through the allocated quality secondary wireless link.

As a specific application scenario, referring to FIG. 5, when the network interconnection control apparatus of the originating node receives the service priority, that is, the data packets whose ToS are 0, 1, and 2 respectively, the lookup routing table is obtained from the originating node to The radio link of the destination node includes link 1, link 2, and link 3. Then, the link quality of each link is obtained. Among them, the QoS of link 1 is 0, and the link quality is the best; the QoS of link 2 is 2, and the link quality is second; the QoS of link 3 is 5, and the link quality is the worst.

Then, the network interconnection control device assigns link 1 to the data packet with ToS 0, uses link 1 to transmit the data packet with ToS 0, assigns link 2 to the data packet with ToS 1, and uses the link 2 to send the ToS. 1 packet; link 3 is assigned to a packet with a ToS of 2, and link 3 is used to send a packet with a ToS of 2.

Thereby, simultaneous transmission of data packets through two wireless links between two nodes is achieved. The existing conventional IP routing device does not allow more than two links between any two nodes at the same time. Otherwise, a loop will cause a broadcast storm. According to the existing conventional routing protocol control mode, only one radio link between two nodes is activated and in a working state at the same time, the radio link resource utilization is very low, and the transmission of application data is severely limited.

In this embodiment, all the wireless communication links between the two nodes are in a working state, and multiple links between the two nodes can simultaneously transmit data, which greatly improves the utilization of the link resources and between the nodes. Data transfer efficiency.

Further, the second embodiment of the data transmission method of the present invention provides a data transmission method. Based on the embodiment shown in FIG. 1 , the step S10 further includes:

Step S50: Obtain routing information of the originating node according to the pre-configured destination node attribute information, the wireless subnet connection relationship, and the wireless subnet routing information that reaches the destination node.

In this embodiment, the network interconnection control device configures a routing table of the originating node. The network interconnection control device collects routing information in three ways. The network interconnection control device may select a suitable routing information acquisition manner to obtain routing information of each link according to different link states, and finally generate a routing table of the originating node according to all collected routing information.

Specifically, as an implementation manner, the network interconnection control apparatus acquires routing information of the originating node according to the pre-statically configured destination node attribute information, the wireless subnet connection relationship, and the wireless subnet routing information of the destination node. Applicable to wireless subnets with low subnet bandwidth and subnets that do not report reachable link status.

The destination node attribute information includes a destination node number, a destination node IP address, and a subnet mask and a wireless subnet connection relationship to the destination node, as shown in Table 1 below.

Field	Description
Destination node number	Node identifier
Destination node IP address and subnet mask	Destination IP network segment/subnet mask
Wireless subnet connection relationship to the destination node

Table 1 Destination node attribute information table

The wireless subnet connection relationship includes the subnet number, the physical port, and the remote subnet device address and subnet link quality, as shown in Table 2 below.

Field	Description
Subnet number	Subnet identifier
Physical port	Physical network port of the network interconnection control device connected to the subnet device
Remote subnet device address	Port IP address of the network interconnection control device connected to the subnet on the destination node
Subnet link quality

Table 2 Wireless Subnet Connection Relationship Table

The routing information of the wireless subnet to the destination node records the corresponding routing information of the node and the subnet, including the destination node number and the subnet number, as shown in Table 3 below.

Field	Description
Destination node number	Node identifier
Subnet number

Table 3 Wireless subnet routing information table to the destination node

The network interconnection control device combines Table 1, Table 2, and Table 3 to obtain routing information of the originating node.

And/or, in step S60, acquiring routing information of the originating node according to the pre-configured destination node attribute information and the wireless subnet connection relationship, and the reachability information of the wireless subnet.

Some wireless subnets can actively report the reachability status of the wireless subnet. Therefore, the wireless subnet for actively reporting reachability information can be based on pre-configured destination node attribute information and wireless subnet connection relationship, and wireless subnet report. The reachability information obtains the routing information of the originating node.

The destination node attribute information is as shown in Table 1 above; the wireless subnet connection relationship is as shown in Table 2 above; the reachability information of the wireless subnet report includes the subnet number and the reachable node list, as shown in Table 4 below. .

automatic	Description
Subnet number
Reachable node list

Table 4 Accessibility information table of wireless subnet report

The network interconnection control device combines Table 1, Table 2, and Table 4 to obtain routing information of the originating node.

And/or, in step S70, performing neighbor node detection and link notification according to a pre-configured routing protocol, and acquiring routing information of the originating node.

The routing information of the originating node is collected using a pre-configured routing protocol, mainly for wireless subnets with sufficient bandwidth. The routing information collection method is more flexible and easy to deploy. After the network topology changes, the network topology can be automatically updated. After the link status changes, the routing information can be dynamically updated. Pre-configured routing protocols mainly include two methods, such as wired routing protocols for wired side, such as RIP (Routing). Information Protocol, OSPF (Open Shortest Path) First, open shortest path first), IGRP (Interior Gateway Routing) Protocol, internal gateway routing protocol, etc., and HRP (Heterogeneous Network Router) for the wireless side Protocol, heterogeneous network routing protocol). On the wired side, the network interconnection control device needs to exchange routing information with the router, so the wired side adopts a conventional routing protocol. On the wireless side, nodes are connected by means of wireless communication. The network topology and link status are not fixed. Because the conventional routing protocol occupies a large bandwidth, it takes a long time to achieve algorithm convergence. At this time, due to the mobility of the node, The network topology may have changed, so that the host gets the old routing information after a lot of cost, and the routing information is always in a non-convergence state. Therefore, in the embodiment of the present invention, the HRP is used as the routing protocol of the wireless side of the communication system, and the routing record is cached only when the two nodes communicate with each other. Therefore, the relative maintenance of the routing maintenance is reduced. Moreover, HRP has the characteristics of fast convergence, reduces the overhead of route lookup, quickly discovers routes, improves the performance and efficiency of route discovery, and at the same time, can track and sense link state changes caused by node movement for dynamic route maintenance.

For the wireless side, the routing information is collected through neighbor node detection and link notification, and the routing information of the originating node is collected. The neighbor node probe is used to determine the neighbor node relationship, and periodically sends a message to maintain the neighbor relationship; the link notification synchronizes the local link state to the neighbor node; after receiving the link notification of the neighbor node, the response is responsive. The message is sent to the link notification response to inform the neighbor node that the link notification has been received and processed. Thereby, the routing information between the nodes is collected, and the link information between the nodes is obtained. Then, the network interconnection control device will collect the routing information as the routing information of the originating node.

Step S80: Generate a routing table of the originating node according to the successfully obtained routing information of the originating node.

After the network interconnection control device collects the routing information of the originating node in one or more manners, the routing table of the originating node is generated according to the successfully obtained routing information of the originating node.

Referring to FIG. 6, the routing information collected by the network interconnection control device is synchronized with each other. Specifically, the network interconnection control device collects routing information of the wired side and the wireless side. Then, the network interconnection control device notifies the routing information of the wireless side to the wired side in the subnet through OSPF, and notifies the routing information of the wired side to the wireless side for data transmission between the nodes or subnets.

In this embodiment, the routing information of the originating node is flexibly collected in multiple manners, and then the routing information of the originating node is successfully collected according to one or more manners, and a routing table of the originating node is generated for searching. The wireless link of the destination node. In this embodiment, a plurality of routing information acquisition modes are configured, and access is supported by multiple communication means. The routing protocol has fast convergence and low overhead, which ensures the correctness of the routing information.

Further, the third embodiment of the data transmission method of the present invention provides a data transmission method. Based on the second embodiment of the data transmission method of the present invention, the step S70 includes:

Step S71: Configure a link state table of the originating node.

Specifically, as an implementation manner, the wireless side route needs to maintain a link state table by the application layer. Different from the routing table, the link state table describes the link information that can reach a certain node. There may be multiple links, each of which has its own weight information. It is the neighbor relationship or link state change of each node. After that, I took the initiative to report to my neighbors. The link state table includes the destination network prefix, subnet mask, next hop IP address, local forwarding port, table source, link weight, link attribute, and node list. The source of the link is the source of the link information, which can be static or automatically generated, such as HRP. The weight is calculated from the network quality and port metrics carried in the link request and can be used to characterize the link quality. The greater the weight, the better the link quality. If the weight is 0, the link is disconnected. The attribute is the status of the link. If the link information changes after the last notification, it is set to new (new), otherwise it is set to old (old). The node list is used to record all nodes passing through the packet according to the sequence of nodes through which the link notification message is passed. Therefore, when a link notification message is sent to its neighbor node, the node already existing in the node list can be avoided according to the node list, and used to prevent the routing loop.

Step S72: Send a probe message to the neighbor node of the originating node, establish a link with the neighbor node, and update the link state table.

The purpose of neighbor node detection is to determine the neighbor relationship, establish a link, and periodically send probe messages to maintain the neighbor relationship. The probe messages between the nodes include a node probe request and a node probe response. It should be noted that both the node probe request and the node probe response are only transmitted between neighbor nodes. Then, the network interconnection control device separately sends a node probe request to each neighbor node of the originating node; after receiving the node probe response of the neighbor node, the network interconnection control device records the routing information of the neighbor node, and sends an acknowledgement message to the neighbor node. Establishing a link and a neighbor relationship; then the network interconnection control device sends a node probe request to the neighbor node according to a preset frequency to maintain the neighbor relationship.

An example is given in which the current originating node includes one neighbor node. Referring to FIG. 7, the originating node is node A, and when node A starts, it detects a port that has been locally turned on. One node A has already opened a port locally and connects to node B. The process of establishing and maintaining a neighbor relationship between node A and neighboring node B is as follows:

The node A multicast sending node probes the request, that is, the hello packet. The neighbor field in the packet is empty. (Because node A has not received the hello packet from node B, the node ID of node B is unknown.) After receiving the hello message of the node A, the node B detects that the neighbor field is empty, and immediately sends a hello message of the node probe response to the node A, and fills in the router ID of the node A in the neighbor field; the node A receives After the packet of the Node B, the neighbor field is detected as its own ID, and it is proved that the Node B has received its own hello request. At this time, the node A adds the Node B to its neighbor list, establishes a neighbor relationship, and immediately goes to the node. B sends an acknowledgement message, and the neighbor field fills in the node ID of the node B. After receiving the packet of the node A, the node B detects that the neighbor field is its own router ID, and adds the node A to its neighbor node to establish Neighbor relationship

Thereby, the establishment of a link between the node A and the node B is achieved.

Then, Node A and Node B periodically send a node probe request, that is, a hello packet, to the other party to maintain the neighbor relationship. If the node A or the node B does not receive the hello packet sent by the peer, the link is considered to be disconnected. .

By analogy, node A establishes a link with node C and node D, respectively, and maintains the neighbor relationship; node B establishes a link with node A and node C, respectively, and maintains the neighbor relationship; node C and node A, node B, Node D establishes a link and maintains a neighbor relationship; node D establishes a link with node A and node C, respectively, and maintains a neighbor relationship.

Thereby, neighbor node detection is achieved. The network interconnection control device fills the link state table with the link information of the originating node and the neighbor node, and updates the link state table.

Step S73: When the link state of the originating node and the neighboring node is updated, send a link notification to the neighboring node to perform link information synchronization, and update the link state table.

The purpose of the link notification is to synchronize the link state of the originating node to the neighbor node. To reduce the network traffic, only the changed link state needs to be synchronized, that is, only the link state with the neighbor node is detected. All link information needs to be synchronized when the link status is updated from disconnection to connectivity, from connectivity to disconnection. Further, due to the instability of the wireless link, if the wired side routing link status changes immediately, the network congestion will be rapidly increased, and the network convergence rate will be seriously affected. In view of the characteristics of the wireless side network, By preset time interval. When the link status changes, the link notification is sent after the preset time interval to avoid the link notification being too frequent.

For example, when a node establishes a neighbor relationship with a neighbor node for the first time, the node may send a link notification message to each neighbor node after a preset time interval to update the link status recorded by each node; After the neighbor relationship, if the link is disconnected, the node may send a link notification message to the neighbor node after the preset time interval to update the link status recorded by each node.

The link notification message includes: the IP and mask of the destination node, the link quality, the node list, and the CSEQ value. The link quality can be characterized by the link weight. The greater the weight, the better the link quality. If the weight is 0, the link is disconnected. The node list is used to record all nodes passing through the packet according to the sequence of nodes through which the link notification message is passed. Therefore, when a link notification message is sent to its neighbor node, the node already existing in the node list can be avoided according to the node list, and used to prevent the routing loop. In order to correspond to the link notification response, a CSEQ (Command must be added) Sequence Number, the name of the command sequence, used to identify and arrange the transaction. This value is generated by the node that initiated the message and is an incremental sequence.

It should be noted that when the node establishes a neighbor relationship with the neighboring node for the first time, the link notification message records all the local link information of the node, and only the link information whose status is updated is recorded.

Referring to Fig. 8, the originating node is exemplified as node A. The neighbor nodes of node A are node B and node C; the neighbor nodes of node B are node A and node C; the neighbor nodes of node C are node B and node D; and the neighbor node of node D is node C.

When node A starts, the network interconnection management device first learns the route from the local wired network: 192/gateway/link quality.

After the node A receives the Hello packet with the ID of the node A sent by the node B, it confirms that the link is successfully established with the node B, determines the neighbor relationship with the node B, and notifies the node B to all the local links. Start the timer to wait for the response of Node B;

After receiving the LinkNotice message of Node A, Node B stores the link 192/A/link quality. At the same time, after adding the node to the node list of the source IP packet, the node B forwards it to its neighbor node, but ignores the existing neighbor node in the node list during the sending process, that is, B can only forward to the neighbor node C. Cannot forward to A;

Node C receives the RREQ of Node B (Route After the REQuest (route request) request, the link 192/B/link quality is generated, and at the same time, the process of the Node B is repeated, and the link notification is sent to the node D;

After receiving the RREQ request from the node C, the node D generates the link 192/C/link quality. Since the node D has no neighbor nodes other than the node C, the link notification is no longer sent.

After receiving the Hello message with the ID of the node A sent by the node C, the node A confirms that the link is successfully established with the node C, determines the neighbor relationship with the node C, and notifies the local link to the node C, and Start the timer waiting for the response of node C;

After receiving the RREQ request from the node A, the node C finds that the existing link exists with the node A. If the weight of the new link is less than or equal to the existing link, the node C does not perform any processing; otherwise, the node C goes to its neighbor node. Send a link notification.

It should be noted that when there is more than one link between two neighboring nodes, an optimal link needs to be selected according to the link weight to notify the link, and there is only one between the two adjacent nodes. If a link exists, the connection between the neighbor nodes is considered to be unbroken. Thereby, link information synchronization between the nodes is achieved. Each node network interconnection control device updates the updated link information to the configured link state table.

Further, if the link notification response sent by the neighbor node is not received at the preset time, the process proceeds to step S72. The link notification response is a response message that is replied to the neighboring node after receiving the link notification of the neighboring node. Like the link notification, it is only transmitted between adjacent nodes, and is used to inform the neighboring node that the node has received the chain. The road informs the message and handles it correctly. When the node sends a link notification to the neighbor node, it starts a timer to time. If the link notification response of the neighboring node is not received within the preset time, it is considered to be disconnected from the neighboring node, and the probe message is resent to establish a link.

Based on the above-described embodiment shown in FIG. 8, the link state table of the originating node A can be referred to Table 5 below.

Destination network prefix	Subnet mask	Next hop IP address	Local forwarding port	Table source	Weights	Attributes	Node list
11.36.1.0	255.255.255.0	1.1.1.1	Fei_0/1.1	Static	1	Old	A, B
11.36.2.0	255.255.255.0	1.1.1.1	Fei_0/1.1	Static	2	New	A, C
11.36.3.0	255.255.255.0	2.1.1.1	Fei_0/1.2	Static	5	Old	B, C
2.1.1.1	255.255.255.255	2.1.1.1	Fei_0/1.2	HRP	0	Old	B
3.0.0.0	255.0.0.0	3.1.1.1	Fei_0/1.3	HRP	0	Old	B
10.0.0.0	255.0.0.0	2.1.1.1	Fei_0/1.2	HRP	0	Old	C
0.0.0.0	0.0.0.0	1.1.1.1	Fei_0/1.1	Static	0	New	A, B

Table 5 Link Status Table

Step S74: Update the link state table when receiving the link notification sent by the neighboring node.

When the network interconnection control device of the originating node receives the link notification sent by the neighboring node, the link state of the originating node and the neighboring node in the link state table is updated according to the link notification sent by the neighboring node. And send a link notification according to the neighbor node information.

Step S75: Acquire routing information of the originating node according to the link state table.

The network interconnection configuration device configures the routing information of the originating node based on the state information of each link described in the link state table of the originating node. It should be noted that when there are multiple links to the same destination node as described in the link state table, the link with the highest link weight value, that is, the link with the best link quality, may be selected for configuring the originating node. Routing information.

In this embodiment, the neighbor node detection is performed, the link between the neighbor nodes is established, and the link information between the nodes is collected. The link information is used to implement the routing information of the wireless link between the nodes in the communication system. The update makes the communication system link consume low and fast convergence, which greatly improves the data transmission efficiency.

Further, the fourth embodiment of the data transmission method of the present invention provides a data transmission method. Based on the first embodiment, the second embodiment, and the third embodiment of the data transmission method of the present invention, the step S20 includes:

Step S90: Arranging a level-based packet queue according to the service priority of each data packet.

Since the bandwidth of the network is limited, especially for the bandwidth resources of each wireless subnet connected to the network interconnection control device, if the traffic sent by the user is not limited, the sudden burst of data of a large number of users will only make the network more crowded. In order to make the limited network resources work better and provide better services to users, the user's traffic must be limited. For example, limiting a voice stream at each time interval can only get the part of the resources promised to be allocated to it, preventing network congestion caused by excessive bursts.

Specifically, as an implementation manner, first, the network interconnection control apparatus performs flow classification on each received data packet according to the service priority described in the ToS field, and adopts CBQ (Class) for each type of data. Based Queuing, a level-based queue) congestion control strategy. That is, the network interconnection control device allocates packet correspondences of different service priorities into different packet queues.

Step S100: sequentially extract the data packet in the data packet queue, and evaluate whether the data traffic exceeds a preset criterion; if the data traffic does not exceed the standard, proceed to step S20.

The Internetwork Control Device restricts traffic and its resource usage by regulating traffic specifications. The premise of traffic policing is to know whether the traffic exceeds the specifications, and then implement the control strategy based on the evaluation results. In this embodiment, the network interconnection control device uses a token bucket (Token) Bucket) evaluates the traffic specifications. When the network traffic is too large, the high-priority data is sent preferentially, and the next-highest-priority data is cached. The lower-priority data can be directly discarded to prevent network congestion. Specifically, the token bucket can be regarded as a container for storing a certain number of tokens. The network interconnection control device places a token into the bucket at a preset speed. When the token in the bucket is full, that is, the preset data traffic standard is reached, the excess token overflows, and the token in the bucket is no longer increased.

Referring to FIG. 9, after obtaining the packet queue, the network interconnection control device sequentially takes out the data packet from the packet queue and performs evaluation. Each time a packet is taken, an evaluation is performed. If there are enough tokens available in the bucket for each evaluation, the flow control is within the allowable range, and the preset standard is not exceeded. The number of tokens with the same data size as the data packet is taken, and then the data packet is sent to the destination node; otherwise, the current traffic exceeds the standard, and the data packet with low service priority can be discarded, and the physical port is limited.

Further, by setting a transmission buffer, a buffer space is reserved for a queue with a high service priority, so that the transmission quality of the high priority data packet is guaranteed; and the buffer space has no effect on the service priority low queue, that is, , does not cache packets with low business priority.

In this embodiment, through the data flow control, the limited network resources can be better utilized, and the overall efficiency of data transmission is improved.

Further, the fifth embodiment of the data transmission method of the present invention provides a data transmission method, based on the first embodiment, the second embodiment, the third embodiment, or the fourth embodiment of the data transmission method of the present invention, the step S30. include:

Step S31: Prioritize the wireless links according to the link quality of each radio link.

Step S32: According to the service priority of each data packet and the priority of each radio link, polling allocates a corresponding radio link to each data packet.

Wireless subnets have tight bandwidth resources relative to wired networks. HF (High Frequency, high frequency) link bandwidth is generally 300bps ~ 2.4Kbps, VHF (Very High Frequency, VHF) Link bandwidth is generally 4.8Kbps, 9.6Kbps, 19.2Kbps, UHF (Ultra High Frequency, UHF) link bandwidth is generally 1Mbps, satellite link bandwidth is generally 2.4Kbps ~ 2Mbps. The two nodes communicate by wireless means. When a large amount of data is transmitted by a single means, it is easy to send congestion and transmit data for a long time; therefore, when there are multiple wireless means between the two nodes, the network interconnection control The device can transmit data by multiple radio links at the same time through the polling and transmitting mode, so that service traffic is load-sharing on multiple wireless links, and the efficiency of service transmission is improved. The polling transmission needs to be combined with the bandwidth and transmission quality of the wireless subnet. The link with high bandwidth and good transmission quality can transmit more data in the same time.

Specifically, as an implementation manner, in the parallel transmission mode, the network interconnection control device comprehensively transmits the priority of the data and the state of the wireless network link, and dynamically selects the parallel wireless network link for data transmission. Each subnet periodically reports the link quality of each radio link, and the network interconnection control device periodically queues the radio links according to the quality of the received radio link. At the same time, the parallel service that needs to be sent by the current originating node is queued with priority. Then, according to the priority of each data packet and the priority of each radio link, a high-priority radio link is preferentially assigned to a data packet with a high priority, and a priority packet is assigned to a service packet with a lower priority. The wireless link, and so on, until each wireless link has been assigned. Then, the data packets of the unassigned wireless link are continuously taken out, and the wireless link is sequentially allocated for each data packet according to the priority of each wireless link.

Therefore, a radio link with a high priority and a high link quality transmits a large number of data packets, and a radio link with a low priority and a poor link quality transmits fewer data packets, so that each radio link is Can be fully utilized.

Referring to Fig. 10, the node 1 transmits data to the node 2 for distance description.

Node 1 sends a large amount of data to node 2, including packets 1, 2, 3, 4, 5, and 6. The HF subnet link, the VHF subnet link, and the UHF subnet link between the two nodes can be reached. Among them, the UHF subnet has the largest bandwidth and the best link quality, the VHF subnet is second, the link quality is second, the HF subnet has the narrowest bandwidth, and the link quality is the worst, so the time of sending a packet of data in the HF subnet Within the control, the VHF subnet can transmit 2 packets of data, and the UHF subnet can send 3 packets of data. Therefore, UHF subnets are allocated for packets 1, 4, 6 in a polling manner, VHF subnets are assigned to packets 2, 5, and HF subnets are assigned to packet 3. Thereby, the data of the node 1 is simultaneously transmitted in parallel by the multilink.

In this embodiment, through the polling allocation of the wireless link, data is transmitted in parallel by multiple links at the same time between the two nodes, so that the service traffic is load-sharing on multiple wireless links, and the link resources are fully utilized. Improve data transfer efficiency.

Referring to FIG. 2, the data transmission apparatus of the present invention provides a data transmission apparatus, and the data transmission apparatus includes:

The receiving module 10 is configured to receive each data packet sent by the service initiating device in the originating node, and obtain a service priority and a destination node of each data packet.

The querying module 20 is configured to search, according to the pre-configured routing table of the originating node, each radio link that the originating node reaches the destination node, and acquire the link quality of each radio link.

The allocating module 30 is configured to allocate a wireless link to each data packet according to the service priority of each data packet and the link quality of each wireless link.

The sending module 40 is configured to send the data packets to the destination node through the allocated wireless link.

For the specific implementation, reference may be made to the first embodiment of the data transmission method of the present invention shown in FIG. 1 above. The embodiment realizes that multiple links between two nodes transmit data at the same time, which greatly improves the utilization of link resources and improves the data transmission efficiency between nodes.

Further, the second embodiment of the data transmission apparatus of the present invention provides a data transmission apparatus. Based on the embodiment shown in FIG. 2, the data transmission apparatus further includes:

The configuration module 50 is configured to acquire routing information of the originating node according to the pre-configured destination node attribute information, the wireless subnet connection relationship, and the wireless subnet routing information that reaches the destination node; according to the pre-configured destination node attribute The information and the wireless subnet connection relationship, and the reachability information of the wireless subnet report, obtain the routing information of the originating node; perform neighbor node detection and link notification according to the pre-configured routing protocol, and obtain the originating Routing information of the node; generating a routing table of the originating node according to the successfully obtained routing information of the originating node.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference may be made to the second embodiment of the data transmission method of the present invention described above. In this embodiment, a plurality of routing information acquisition modes are configured, and access is supported by multiple communication means. The routing protocol has fast convergence and low overhead, which ensures the correctness of the routing information.

Further, the third embodiment of the data transmission apparatus of the present invention provides a data transmission apparatus. Based on the second embodiment of the data transmission apparatus of the present invention, the configuration module 50 is further configured to:

Configuring a link state table of the originating node; transmitting a probe message to a neighbor node of the originating node, establishing a link with the neighbor node, and updating the link state table; at the originating node and When the link state of the neighbor node is updated, sending a link notification to the neighbor node to perform link information synchronization, and updating the link state table; when receiving the link notification sent by the neighbor node, updating the The link state table is obtained; and the routing information of the originating node is obtained according to the link state table.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference may be made to the third embodiment of the data transmission method of the present invention described above. In this embodiment, the routing information of the wireless link between the nodes in the communication system is updated, so that the communication system link has low consumption and fast convergence, and the data transmission efficiency is greatly improved.

Further, the fourth embodiment of the data transmission apparatus of the present invention provides a data transmission apparatus. The data transmission apparatus further includes: based on the first embodiment, the second embodiment, or the third embodiment of the data transmission apparatus of the present invention.

The control module 60 is configured to arrange the level-based data packet queue according to the service priority of each data packet; sequentially extract the data packet in the data packet queue, and evaluate whether the data traffic exceeds a preset standard.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference may be made to the fourth embodiment of the data transmission method of the present invention described above. In this embodiment, through limited data resources, limited network resources can be better utilized, and the overall efficiency of data transmission is improved.

Further, the fifth embodiment of the data transmission apparatus of the present invention provides a data transmission apparatus, based on the first embodiment, the second embodiment, the third embodiment or the fourth embodiment of the data transmission apparatus of the present invention, the distribution module 30, also used,

And prioritizing the radio links according to the link quality of each radio link; and polling according to the service priority of each data packet and the priority of each radio link Each data packet is assigned a corresponding wireless link.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the fifth embodiment of the data transmission method of the present invention described above. In this embodiment, the polling distribution of the wireless link realizes that multiple links simultaneously transmit data in parallel between two nodes, so that service traffic is load-sharing on multiple wireless links, fully utilizing each link resource, and improving data transmission. effectiveness.

The above is only an alternative embodiment of the present invention, and thus does not limit the scope of the invention, and the equivalent structure or equivalent process transformation made by using the specification and the drawings of the present invention, or directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

Claims (14)

1.  A data transmission method, characterized in that the data transmission method comprises the following steps:

   Receiving each data packet sent by the service initiating device in the originating node, and acquiring a service priority and a destination node of each data packet;

   Obtaining, according to the pre-configured routing table of the originating node, each radio link that the originating node reaches the destination node, and acquiring link quality of each radio link;

   Allocating a wireless link to each data packet according to a service priority of each data packet and a link quality of each wireless link;

   Each of the data packets is sent to the destination node through an allocated wireless link.
2. The data transmission method according to claim 1, wherein the step of receiving the data packets sent by the service initiating device in the originating node and acquiring the service priority and the destination node of each data packet is further include:

   Obtaining routing information of the originating node according to the pre-configured destination node attribute information, the wireless subnet connection relationship, and the wireless subnet routing information that reaches the destination node; and/or,

   Obtaining routing information of the originating node according to the pre-configured destination node attribute information and the wireless subnet connection relationship, and the reachability information of the wireless subnet report; and/or,

   Obtaining neighbor node detection and link notification according to a pre-configured routing protocol, and acquiring routing information of the originating node;

   Generating a routing table of the originating node according to the successfully obtained routing information of the originating node.
3. The data transmission method according to claim 2, wherein the step of performing neighbor node detection and link notification according to a pre-configured routing protocol, and obtaining routing information of the originating node comprises:

   Configuring a link state table of the originating node;

   Sending a probe message to a neighbor node of the originating node, establishing a link with the neighbor node, and updating the link state table;

   When the link state of the originating node and the neighboring node is updated, sending a link notification to the neighboring node to perform link information synchronization, and updating the link state table;

   Updating the link state table when receiving the link notification sent by the neighbor node;

   Obtaining routing information of the originating node according to the link state table.
4. The data transmission method according to claim 1, wherein the searching for the wireless link of the originating node to the destination node according to a pre-configured routing table of the originating node, and acquiring the Before the step of describing the link quality of each wireless link, the method further includes:

   Arranging a level-based packet queue according to the service priority of each data packet;

   And sequentially extracting the data packet in the data packet queue, and evaluating whether the data traffic exceeds a preset criterion; if the data traffic does not exceed the standard, proceeding to the performing step: searching for the foregoing according to the pre-configured routing table of the originating node The originating node arrives at each radio link of the destination node and acquires the link quality of each radio link.
5. The data transmission method according to claim 1, wherein said assigning a wireless link to said each data packet according to a service priority of said each data packet and a link quality of said each wireless link The steps include:

   And prioritizing the wireless links according to the link quality of each wireless link;

   And according to the service priority of each data packet and the priority of each radio link, the polling allocates a corresponding radio link to each data packet.
6. The data transmission method according to claim 3, wherein the searching for the wireless link of the originating node to the destination node according to a pre-configured routing table of the originating node, and acquiring the Before the step of describing the link quality of each wireless link, the method further includes:

   Arranging a level-based packet queue according to the service priority of each data packet;

   And sequentially extracting the data packet in the data packet queue, and evaluating whether the data traffic exceeds a preset criterion; if the data traffic does not exceed the standard, proceeding to the performing step: searching for the foregoing according to the pre-configured routing table of the originating node The originating node arrives at each radio link of the destination node and acquires the link quality of each radio link.
7. The data transmission method according to claim 4, wherein said assigning a wireless link to said each data packet according to a service priority of said each data packet and a link quality of said each wireless link The steps include:

   And prioritizing the wireless links according to the link quality of each wireless link;

   And according to the service priority of each data packet and the priority of each radio link, the polling allocates a corresponding radio link to each data packet.
8. A data transmission device, characterized in that the data transmission device comprises:

   a receiving module, configured to receive each data packet sent by the service initiating device in the originating node, and obtain a service priority and a destination node of each data packet;

   a querying module, configured to search, according to a pre-configured routing table of the originating node, each radio link that the originating node reaches the destination node, and obtain link quality of each radio link;

   An allocating module, configured to allocate a wireless link to each data packet according to a service priority of each data packet and a link quality of each wireless link;

   And a sending module, configured to send each of the data packets to the destination node by using an allocated wireless link.
9. The data transmission device according to claim 8, wherein the data transmission device further comprises:

   a configuration module, configured to acquire routing information of the originating node according to pre-configured destination node attribute information, a wireless subnet connection relationship, and wireless subnet routing information that reaches the destination node; and according to the pre-configured destination node attribute information And the wireless sub-network connection relationship, and the reachability information of the wireless subnet report, obtaining routing information of the originating node; performing neighbor node detection and link notification according to a pre-configured routing protocol, acquiring the originating node Routing information; generating a routing table of the originating node according to the successfully obtained routing information of the originating node.
10. The data transmission device according to claim 9, wherein said configuration module is further configured to:

    Configuring a link state table of the originating node; transmitting a probe message to a neighbor node of the originating node, establishing a link with the neighbor node, and updating the link state table; at the originating node and When the link state of the neighbor node is updated, sending a link notification to the neighbor node to perform link information synchronization, and updating the link state table; when receiving the link notification sent by the neighbor node, updating the The link state table is obtained; and the routing information of the originating node is obtained according to the link state table.
11. The data transmission device according to claim 8, wherein the data transmission device further comprises:

    The control module is configured to: according to the service priority of each data packet, arrange a level-based data packet queue; sequentially extract the data packet in the data packet queue, and evaluate whether the data traffic exceeds a preset standard.
12. The data transmission device according to claim 8, wherein the allocation module is further configured to:

    And prioritizing the radio links according to the link quality of each radio link; and polling according to the service priority of each data packet and the priority of each radio link Each data packet is assigned a corresponding wireless link.
13. The data transmission device of claim 10, wherein the data transmission device further comprises:

    The control module is configured to: according to the service priority of each data packet, arrange a level-based data packet queue; sequentially extract the data packet in the data packet queue, and evaluate whether the data traffic exceeds a preset standard.
14. The data transmission device according to claim 11, wherein said distribution module is further configured to:

    And prioritizing the radio links according to the link quality of each radio link; and polling according to the service priority of each data packet and the priority of each radio link Each data packet is assigned a corresponding wireless link.