CN113225688B - Data transmission method and display device - Google Patents
Data transmission method and display device Download PDFInfo
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- CN113225688B CN113225688B CN202010071619.7A CN202010071619A CN113225688B CN 113225688 B CN113225688 B CN 113225688B CN 202010071619 A CN202010071619 A CN 202010071619A CN 113225688 B CN113225688 B CN 113225688B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/12—Messaging; Mailboxes; Announcements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
Abstract
The application discloses a data transmission method and a display device, and belongs to the technical field of Bluetooth wireless. After a processor in the display device acquires a first message sent by a first node in the Bluetooth mesh network, when a first identification set of the display device meets a target condition, the time-to-live TTL in the first message is updated to 0 to obtain a second message, and then the Bluetooth component broadcasts the second message in the Bluetooth mesh network. When the destination node is a neighbor node of the display device, the destination node does not broadcast the second message after receiving the second message sent by the display device, so that the destination node can be ensured to receive the second message, and other nodes can be prevented from performing invalid forwarding, thereby reducing the waste of transmission resources. When the display device only has one neighbor node, namely the first node, the first node which receives the second message broadcasted by the display device can not broadcast the message any more, so that the waste of transmission resources is reduced.
Description
Technical Field
The present application relates to the field of bluetooth wireless technologies, and in particular, to a data transmission method and a display device.
Background
With the proposal of wireless mesh network (mesh network) technology and the continuous development of internet of things technology, bluetooth (bluetooth) technology is one of the foundations of internet of things technology, the bluetooth alliance has released the standard of bluetooth mesh network, and bluetooth technology starts to fully support mesh network.
The Bluetooth mesh network can realize many-to-many transmission among devices and can construct a communication network with wide coverage. The existing Bluetooth mesh network can be applied to building automation, smart homes, wireless sensor networks and the like, and can enable a large amount of equipment to transmit data in a reliable and safe environment.
Devices in the bluetooth mesh network generally use flooding (flooding) for data transmission. When a certain device broadcasts a message in the bluetooth mesh network, a plurality of devices in the bluetooth mesh network can forward the message, a large amount of invalid forwarding can be generated, and the waste of transmission resources is caused.
Disclosure of Invention
The embodiment of the application provides a data transmission method and a display device, which can solve the problem of wasting transmission resources in the related technology. The technical scheme is as follows:
in a first aspect, there is provided a display device, comprising:
the display screen is used for presenting image pictures;
a speaker for presenting sound data;
a Bluetooth component to communicate with other nodes in the Bluetooth mesh network;
the processor is used for updating the time-to-live TTL in the first message to 0 to obtain a second message when the first identification set of the display device meets the target condition after the first message sent by the first node in the Bluetooth mesh network is obtained;
the bluetooth component to broadcast the second message in the bluetooth mesh network;
wherein the first node is a neighbor node of the display apparatus, the first message includes an identifier of a destination node, the first identifier set includes identifiers of all neighbor nodes of the display apparatus, and the first identifier set satisfies a target condition, including: the first identification set comprises the identification of the destination node, and/or the first identification set only comprises the identification of the first node.
In a second aspect, a data transmission method is provided, the method including:
a first node receives a first message sent by a second node, wherein the first message comprises an identifier of a destination node;
when the first identification set of the first node meets a target condition, the first node updates the time-to-live TTL in the first message to 0 to obtain a second message;
the first node broadcasting the second message in the Bluetooth mesh network;
wherein the first identifier set includes identifiers of all neighbor nodes of the first node, and the first identifier set satisfies a target condition, including: the first identification set comprises the identification of the destination node, and/or the first identification set only comprises the identification of the second node.
In a third aspect, a data transmission apparatus is provided, the apparatus including:
the receiving circuit is used for receiving a first message sent by a second node, wherein the first message comprises an identification of a destination node;
the updating circuit is used for updating the time-to-live TTL in the first message to 0 by the first node when the first identifier set of the first node meets a target condition to obtain a second message;
broadcast circuitry to broadcast the second message in the Bluetooth mesh network;
wherein the first identifier set includes identifiers of all neighbor nodes of the first node, and the first identifier set satisfies a target condition, including: the first identification set comprises the identification of the destination node, and/or the first identification set only comprises the identification of the second node.
In a fourth aspect, a computer storage medium is provided, having instructions stored thereon, which when executed by a processor, implement the data transmission method according to any one of the second aspect.
The beneficial effects that technical scheme that this application embodiment provided brought include:
in the data transmission method provided by the application, when the first identifier set includes an identifier of a destination node, that is, the destination node is a neighbor node of the first node, the first node broadcasts a second message in the bluetooth mesh network, and at this time, the destination node can receive the second message broadcast by the first node, and since the TTL of the second message is equal to 0, the neighbor node of the first node can not broadcast the message any more, so that the destination node can be ensured to receive the second message, and other nodes can be prevented from performing invalid forwarding, thereby reducing the waste of transmission resources. When the first identifier set only includes the identifier of the second node, that is, the first node only has a neighbor node, that is, the second node, the TTL in the second message obtained by the first node updating the first message is equal to 0, the first node broadcasts the second message in the bluetooth mesh network, and since the TTL of the second message is equal to 0, the second node receiving the second message broadcast by the first node does not broadcast the message any more, thereby reducing the waste of transmission resources.
Drawings
Fig. 1 is a schematic structural diagram of a bluetooth mesh network according to an embodiment of the present application;
fig. 2 is a schematic flowchart of a data transmission method according to an embodiment of the present application;
fig. 3 is a schematic flowchart of another data transmission method provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of another data transmission device provided in an embodiment of the present application;
fig. 6 is a schematic structural diagram of another data transmission apparatus provided in the embodiment of the present application;
fig. 7 is a schematic structural diagram of another data transmission apparatus provided in an embodiment of the present application;
fig. 8 is a block diagram of a data transmission apparatus according to an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a bluetooth mesh network according to an embodiment of the present application. As shown in fig. 1, the bluetooth mesh network includes nodes a-M. The two nodes in the figure have connecting lines between them, indicating that the two nodes can communicate directly with each other. Each node in the bluetooth mesh network in fig. 1 and the communication relationship between each node are only used as illustrations, and are not used as limitations to the bluetooth mesh network provided in the embodiment of the present application.
Optionally, the bluetooth mesh network provided in the embodiment of the present application may be a bluetooth mesh network applied to building automation, a bluetooth mesh network applied to smart homes, or a bluetooth mesh network applied to a wireless sensor network, and the like. The embodiment of the application does not limit the application scene of the Bluetooth mesh network. The nodes in the bluetooth mesh network are devices (i.e., bluetooth devices) having a bluetooth connection function, and may be, for example, a bluetooth television, a bluetooth speaker, a bluetooth gateway, or the like.
The bluetooth mesh network generally includes a distribution network device, which is used for performing distribution network operation and sending out control information. The network distribution equipment can be any node in the Bluetooth mesh network. For example, in the bluetooth mesh network shown in fig. 1, the node a may be a distribution network device. The process of the network distribution by the network distribution equipment as a node can refer to related technologies, and the embodiment of the application is not described herein again.
After the network distribution of the nodes in the bluetooth mesh network is completed, the nodes can broadcast the network access indication information of the nodes in the bluetooth mesh network. The network access indication information of the node comprises the identifier of the node. Optionally, the identifier of the node in this embodiment may be a Media Access Control (MAC) address of the node, a Universal Unique Identifier (UUID) of the node, or other information that may be used to uniquely identify the node.
In the embodiment of the application, the nodes in the bluetooth mesh network have a first identifier set and a second identifier set. The first set of identities includes identities of all neighbor nodes of the node. The second identification set comprises the neighbor relation among all nodes in the Bluetooth mesh network where the node is located.
Illustratively, in the bluetooth mesh network shown in fig. 1, the first set of identities of node C includes an identity of node a, an identity of node F, and an identity of node I. The second identification set of the node C comprises { A: B, C, D, E; b is A; c is A, F, I; d is A and I; e is A, G, H, I; f is C; g is E; h, E; i is C, D, E, J; j is I, K, M; k is J, L; l is K, M; m: j, L, wherein A, B, C, D and E represent: the node A has neighbor relations with the node B, the node C, the node D and the node E respectively, namely the node B, the node C, the node D and the node E are neighbor nodes of the node A.
When a node in the Bluetooth mesh network receives a network access indication message sent by a new distribution network node, the node determines that the new distribution network node is a neighbor node of the node, and the network access indication message comprises an identifier of the new distribution network node. And then, the node adds the identifier of the new distribution network node into the first identifier set to obtain an updated first identifier set. Then, the node broadcasts a neighbor node update message in the Bluetooth mesh network, wherein the neighbor node update message comprises the identifier of the node and the updated first identifier set. After receiving the neighbor node update message broadcast by the node, other nodes in the bluetooth mesh network can update the neighbor relation corresponding to the node in the second identifier set of the other nodes.
At present, data transmission is generally performed between nodes in a bluetooth mesh network in a flooding manner. Illustratively, in the bluetooth mesh network shown in fig. 1, when node a sends a message to node M, with reference to the relevant bluetooth mesh network standard, the actually generated transmission path includes: a → B, A → D → I → J → M, A → C → F, A → E → G and A → C → I → J → K → L → M, etc. The transmission paths a → D → I → J → M and a → C → I → J → K → L → M are effective paths, and it is realized that the node a sends a message to the node M, but the transmission path a → C → I → J → K → L → M causes more message forwarding than the transmission path a → D → I → J → M. The transmission paths a → B, A → C → F and a → E → G are invalid paths, which cannot realize that node a sends a message to node M, and many invalid message forwarding will occur.
Fig. 2 is a schematic flowchart of a data transmission method according to an embodiment of the present application. The method can be applied to a bluetooth mesh network as shown in fig. 1. As shown in fig. 2, the method includes:
The first message includes an identification of the destination node.
The first set of identities comprises identities of all neighbour nodes of the first node. The first set of identifications satisfies a target condition, including: the first identification set comprises the identification of the destination node, and/or the first identification set only comprises the identification of the second node.
To sum up, in the data transmission method provided in this embodiment of the present application, when the first identifier set includes an identifier of a destination node, that is, the destination node is a neighbor node of the first node, the first node broadcasts the second message in the bluetooth mesh network, and at this time, the destination node can receive the second message broadcasted by the first node, and since the TTL of the second message is equal to 0, the neighbor node of the first node can no longer broadcast the message, which can ensure that the destination node receives the second message, and can also avoid invalid forwarding by other nodes, thereby reducing waste of transmission resources. When the first identifier set only includes the identifier of the second node, that is, the first node only has a neighbor node, that is, the second node, the TTL in the second message obtained by the first node updating the first message is equal to 0, the first node broadcasts the second message in the bluetooth mesh network, and since the TTL of the second message is equal to 0, the second node receiving the second message broadcast by the first node does not broadcast the message any more, thereby reducing the waste of transmission resources.
Fig. 3 is a schematic flowchart of another data transmission method according to an embodiment of the present application. The method can be applied to a bluetooth mesh network as shown in fig. 1. As shown in fig. 3, the method includes:
The first message includes an identification of the destination node. Wherein the destination node is a node designated to receive and parse the first message. The TTL in the first message is greater than 0.
The first node in the embodiment of the present application may be any node in a bluetooth mesh network.
The first node compares the identifier of the destination node in the received first message with the identifier of the first node. And if the identification of the destination node is the same as that of the first node, the first node is the destination node. And if the identification of the destination node is different from the identification of the first node, the first node is not the destination node.
And the first node receives a first message sent by the second node, and when the first node is a destination node, the first node analyzes the first message. The first node in the embodiment of the application analyzes the first message, and means that the first node analyzes the first message, acquires an instruction in the first message, and executes the instruction.
The first identification set of the first node comprises identifications of all neighbor nodes of the first node. The first set of identities of the first node satisfying a target condition, comprising: the first identification set of the first node comprises an identification of a destination node, namely the first node and the destination node are neighbor nodes; and/or the first identification set of the first node only comprises the identification of the second node, namely the second node is the only neighbor node of the first node.
For example, referring to the bluetooth mesh network shown in fig. 1, assuming that the first node is node a and the destination node is node C, the first identifier set of node a includes the identifier of node C, that is, node a satisfies the target condition.
For another example, referring to the bluetooth mesh network shown in fig. 1, assuming that the first node is node B and the second node is node a, the first identifier set of node B only includes the identifier of node a, that is, node B satisfies the target condition.
And 305, the first node updates the first message to obtain a second message, and broadcasts the second message in the Bluetooth mesh network.
And the first node updates the TTL in the first message to 0 to obtain a second message. And after the first node updates the first message to obtain a second message, broadcasting the second message in the Bluetooth mesh network. The implementation manner and specific steps of the broadcast message may refer to related technologies, and are not described herein again in this embodiment of the present application.
And step 306, the first node acquires all transmission paths between the first node and the destination node based on the second identifier set.
All transmission paths between the first node and the destination node in the embodiment of the present application refer to all transmission paths that can implement transmission of data in the first message from the first node to the destination node. For example, referring to the bluetooth mesh network shown in fig. 1, assuming that node a is a first node and node M is a destination node, a transmission path between node a and node M includes: a → D → I → J → M, A → C → I → J → K → L → M and A → E → I → J → M, etc.
The first transmission path refers to a path that does not include the second node among all transmission paths between the first node and the destination node. The first transmission path exists in all transmission paths between the first node and the destination node, that is, the first node may not transmit the message to the destination node through the second node.
For example, referring to the bluetooth mesh network shown in fig. 1, assuming that the first node is node a, the second node is node E, and the destination node is node C, there exists a first transmission path in all transmission paths between node a and node C, for example, the first transmission path may include a → C and a → D → I → C.
For example, referring to the bluetooth mesh network shown in fig. 1, assuming that the first node is node B, the second node is node a, and the destination node is node I, there is no first transmission path in all transmission paths between node B and node I.
In this embodiment, a second transmission path exists between the third node and the destination node, and the second transmission path does not include the second node. When the first node judges that the third node does not exist in the neighbor nodes of the second node, namely the second node sends a message to the destination node, the message is sent to the first node and the first node broadcasts the message. The first node judges that a third node exists in the neighbor nodes of the second node, namely when the second node sends a message to the destination node, the message can be sent to the first node, and the message can also be sent to the third node.
For example, referring to the bluetooth mesh network shown in fig. 1, assuming that the first node is a node E, the second node is a node G, and the destination node is a node a, the node E determines that a third node does not exist in neighboring nodes of the node G.
For example, referring to the bluetooth mesh network shown in fig. 1, assuming that the first node is node D, the second node is node a, and the destination node is node J, node D determines that a third node exists in neighboring nodes of node a, where the third node includes node C and node E.
For example, referring to the bluetooth mesh network shown in fig. 1, assuming that the first node is node D, the second node is node a, the destination node is node J, and the third node includes node C and node E, the number of neighbor nodes of node D obtained by node D based on the first identifier set is 2, the number of neighbor nodes of node C obtained by node D based on the second identifier set is 3, and the number of neighbor nodes of node E is 4.
In step 310, the first node determines a size relationship between the number of neighboring nodes of the first node and the number of neighboring nodes of the third node. When the number of the neighbor nodes of the first node is greater than the number of the neighbor nodes of any third node, executing step 311; when the number of neighboring nodes of the first node is less than the number of neighboring nodes of any third node, step 312 is performed.
Discarding the first message by the first node means that the first node deletes the first message locally and the first node does not broadcast the first message.
And step 312, the first node updates the first message to obtain a third message, and broadcasts the third message in the bluetooth mesh network.
And the first node updates the TTL in the first message to obtain a third message, wherein the TTL in the third message is smaller than the TTL in the first message. And after the first node updates the first message to obtain a third message, broadcasting the third message in the Bluetooth mesh network.
Considering the characteristics of bluetooth devices: when a sending node sends a message, a receiving node needs to be in a scanning state to receive the message. Therefore, in the embodiment of the present application, when there is no message to be sent in the first node, the first node is in a scanning state.
In the embodiment of the application, when the first node is in a busy state or a fault state, the first node broadcasts abnormal state information in the Bluetooth mesh network, and the abnormal state information is used for indicating that the first node cannot relay the message. That is, in the data transmission process, the transmission path where the first node is located is an invalid transmission path. Illustratively, referring to the example in step 309, node C may be configured to forward the first message when node D is in a busy state or a fault state. And further, the situation that the relay node relays the message in time or loses packets can be avoided.
The sequence of steps of the data transmission method provided by the embodiment of the application can be properly adjusted, and the steps can be correspondingly increased or decreased according to the situation. Any method that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application is covered by the protection scope of the present application, and thus the detailed description thereof is omitted.
To sum up, in the data transmission method provided in this embodiment of the present application, when the first identifier set includes an identifier of a destination node, that is, the destination node is a neighbor node of the first node, the first node broadcasts a second message in the bluetooth mesh network, and at this time, the destination node can receive the second message broadcasted by the first node, and since TTL in the second message is equal to 0, the neighbor node of the first node can no longer broadcast the message, it can be ensured that the destination node receives the second message, and also avoid invalid forwarding by other nodes, thereby reducing waste of transmission resources.
When the first identifier set only includes the identifier of the second node, that is, the first node only has a neighbor node, that is, the second node, the first node updates the TTL in the second message obtained by the first message at this time to be equal to 0, the first node broadcasts the second message in the bluetooth mesh network, and since the TTL in the second message is equal to 0, the second node that receives the second message broadcast by the first node does not broadcast the message any more, thereby reducing the waste of transmission resources.
When the first identification set does not include the identification of the destination node, the first node determines to update and broadcast or discard the received first message by judging whether the first identification set of the first node meets the target condition, judging whether a first transmission path exists in all transmission paths between the first node and the destination node, judging whether a third node exists in neighbor nodes of the second node, and judging the size relationship between the number of the neighbor nodes of the first node and the number of the neighbor nodes of the third node. In the result determined by the judgment rule, the number of nodes participating in message forwarding is reduced, the message transmission path is shortened, and the waste of transmission resources is reduced.
And when the message to be sent does not exist in the first node, the first node is in a scanning state. Therefore, the first node is always in a state of being capable of receiving the message, and the success rate of message sending is improved.
And when the first node is in a busy state or a fault state, the first node broadcasts abnormal state information in the Bluetooth mesh network, so that the first node does not participate in data transmission, the situation that relay messages of relay nodes are not timely or packet loss is avoided, and the reliability of data transmission is improved.
Fig. 4 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present application, where the apparatus is applied to a first node, and the first node may be any node in the bluetooth mesh network shown in fig. 1. As shown in fig. 4, the apparatus 40 includes:
the receiving circuit 401 is configured to receive a first message sent by a second node, where the first message includes an identifier of a destination node.
And an updating circuit 402, configured to update the first message to obtain a second message when the first node is not the destination node and the first identifier set of the first node meets the target condition, where TTL in the second message is equal to 0.
Wherein, the first identification set includes identifications of all neighbor nodes of the first node, and the first identification set satisfies the target condition, including: the first identification set comprises the identification of the destination node, and/or the first identification set only comprises the identification of the second node.
A broadcasting circuit 403 for broadcasting the second message in the bluetooth mesh network.
To sum up, in the data transmission device provided in this embodiment of the present application, when the first identifier set includes an identifier of the destination node, that is, the destination node is a neighbor node of the first node, the first node broadcasts the second message in the bluetooth mesh network, and at this time, the destination node can receive the second message broadcasted by the first node, and since the TTL of the second message is equal to 0, the neighbor node of the first node can no longer broadcast the message, it can be ensured that the destination node receives the second message, and it can also avoid invalid forwarding by other nodes, thereby reducing waste of transmission resources. When the first identifier set only includes the identifier of the second node, that is, the first node only has a neighbor node, that is, the second node, the TTL in the second message obtained by the first node updating the first message is equal to 0, the first node broadcasts the second message in the bluetooth mesh network, and since the TTL of the second message is equal to 0, the second node receiving the second message broadcast by the first node does not broadcast the message any more, thereby reducing the waste of transmission resources.
Optionally, as shown in fig. 5, the apparatus 40 further includes:
a first obtaining circuit 404, configured to, when the first node is not a destination node and the first identifier set does not meet a target condition, obtain all transmission paths between the first node and the destination node based on a second identifier set, where the second identifier set includes a neighbor relation between nodes in the bluetooth mesh network.
A discarding circuit 405, configured to discard the first message when the first transmission path does not exist in all the transmission paths, where the first transmission path does not include the second node.
Optionally, as shown in fig. 6, the apparatus 40 further includes:
a second obtaining circuit 406, configured to, when there is a first transmission path in all transmission paths and there is a third node in neighbor nodes of the second node, obtain the number of neighbor nodes of the first node based on the first identifier set, and obtain the number of neighbor nodes of the third node based on the second identifier set, where a second transmission path exists between the third node and the destination node, and the second transmission path does not include the second node.
The discarding circuit 405 is further configured to discard the first message when the number of neighboring nodes of the first node is greater than the number of neighboring nodes of any third node.
Optionally, the updating circuit 402 is further configured to update the first message to obtain a third message when the number of the neighbor nodes of the first node is smaller than the number of the neighbor nodes of any third node, where TTL in the third message is smaller than TTL in the first message.
A broadcasting circuit 403, configured to broadcast the third message in the bluetooth mesh network.
Optionally, the broadcasting circuit 403 is further configured to broadcast a network entry indication message of the first node in the bluetooth mesh network after the first node completes network distribution, where the network entry indication message includes an identifier of the first node.
Optionally, as shown in fig. 7, the apparatus 40 further includes:
the determining circuit 407 is configured to determine, when the first node receives a network access indication message sent by the new distribution network node, that the new distribution network node is a neighbor node of the first node, where the network access indication message includes an identifier of the new distribution network node.
The adding circuit 408 is configured to add the identifier of the new distribution network node to the first identifier set, so as to obtain an updated first identifier set.
The broadcasting circuit 403 is further configured to broadcast a neighbor node update message in the bluetooth mesh network, where the neighbor node update message includes an identifier of the first node and the updated first identifier set.
Optionally, the broadcasting circuit 403 is further configured to broadcast an abnormal status message in the bluetooth mesh network when the first node is in a busy state or a fault state, where the abnormal status message is used to indicate that the first node cannot relay the message.
Optionally, when there is no message to be sent in the first node, the first node is in a scanning state.
To sum up, in the data transmission device provided in this embodiment of the present application, when the first identifier set includes an identifier of the destination node, that is, the destination node is a neighbor node of the first node, the first node broadcasts the second message in the bluetooth mesh network, and at this time, the destination node can receive the second message broadcasted by the first node, and since the TTL of the second message is equal to 0, the neighbor node of the first node can no longer broadcast the message, it can be ensured that the destination node receives the second message, and it can also avoid invalid forwarding by other nodes, thereby reducing waste of transmission resources. When the first identifier set only includes the identifier of the second node, that is, the first node only has a neighbor node, that is, the second node, the TTL in the second message obtained by the first node updating the first message is equal to 0, the first node broadcasts the second message in the bluetooth mesh network, and since the TTL of the second message is equal to 0, the second node receiving the second message broadcast by the first node does not broadcast the message any more, thereby reducing the waste of transmission resources.
When the first identification set does not include the identification of the destination node, the first node determines to update and broadcast or discard the received first message by judging whether the first identification set of the first node meets the target condition, judging whether a first transmission path exists in all transmission paths between the first node and the destination node, judging whether a third node exists in neighbor nodes of the second node, and judging the size relationship between the number of the neighbor nodes of the first node and the number of the neighbor nodes of the third node. In the result determined by the judgment rule, the number of nodes participating in message forwarding is reduced, the message transmission path is shortened, and the waste of transmission resources is reduced.
And when the message to be sent does not exist in the first node, the first node is in a scanning state. Therefore, the first node is always in a state of being capable of receiving the message, and the success rate of message sending is improved.
And when the first node is in a busy state or a fault state, the first node broadcasts abnormal state information in the Bluetooth mesh network, so that the first node does not participate in data transmission, the situation that relay messages of relay nodes are not timely or packet loss is avoided, and the reliability of data transmission is improved.
The embodiment of the application provides a display device, which is used in a Bluetooth mesh network, and the display device comprises:
and the display screen is used for presenting an image picture.
A speaker for presenting sound data.
And the Bluetooth component is used for communicating with other nodes in the Bluetooth mesh network.
And the processor is used for updating the TTL in the first message to 0 to obtain a second message when the first identifier set of the display device meets the target condition after the first message sent by the first node in the Bluetooth mesh network is obtained.
The bluetooth component is configured to broadcast the second message in the bluetooth mesh network.
The method for displaying the target node in the display device includes that a first node is a neighbor node of the display device, a first message includes an identifier of a target node, a first identifier set includes identifiers of all neighbor nodes of the display device, and the first identifier set meets a target condition, and includes: the first identification set comprises the identification of the destination node, and/or the first identification set only comprises the identification of the first node.
Optionally, the processor is further configured to, when the display device is not a destination node and the first identifier set does not satisfy the target condition, obtain all transmission paths between the display device and the destination node based on a second identifier set, where the second identifier set includes a neighbor relation between nodes in the bluetooth mesh network. And when the first transmission path does not exist in all the transmission paths, discarding the first message, wherein the first transmission path does not contain the first node.
Optionally, the processor is further configured to, when a first transmission path exists in all transmission paths and a second node exists in neighbor nodes of the first node, obtain the number of neighbor nodes of the display device based on the first identifier set, and obtain the number of neighbor nodes of the second node based on the second identifier set, where a second transmission path exists between the second node and the destination node, and the second transmission path does not include the first node. Discarding the first message when the number of neighboring nodes of the display device is greater than the number of neighboring nodes of any of the second nodes.
Optionally, the processor is further configured to update the TTL of the first message to obtain a third message when the number of the neighbor nodes of the display apparatus is less than the number of the neighbor nodes of any second node, where the TTL of the third message is less than the TTL of the first message. The bluetooth component is further configured to broadcast a third message in the bluetooth mesh network.
Optionally, the bluetooth component is further configured to broadcast a network access indication message of the display device in the bluetooth mesh network after the network distribution of the display device is completed, where the network access indication message includes an identifier of the display device.
Optionally, the bluetooth component is further configured to receive a network access indication message sent by the new distribution network node, where the network access indication message includes an identifier of the new distribution network node.
And the processor is further used for adding the identifier of the new distribution network node into the first identifier set to obtain the updated first identifier set.
And the Bluetooth component is also used for broadcasting a neighbor node updating message in the Bluetooth mesh network, wherein the neighbor node updating message comprises the identifier of the display device and the updated first identifier set.
Optionally, the bluetooth component is further configured to broadcast an abnormal status message in the bluetooth mesh network when the display device is in a busy state or a fault state, the abnormal status message being used to indicate that the display device cannot relay the message.
Optionally, when there is no message to be sent in the display device, the bluetooth component is in a scan state.
Illustratively, fig. 8 shows a block diagram of a display device provided in an exemplary embodiment of the present application. In general, the display device 800 includes: a processor 801 and a memory 802.
The processor 801 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and so forth. The processor 801 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 801 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 801 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the display screen. In some embodiments, the processor 801 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning. The processor 801 is specifically configured to perform steps 302 to 312 in the method shown in fig. 3.
In some embodiments, the display device 800 may further include: a peripheral interface 803 and at least one peripheral. The processor 801, memory 802 and peripheral interface 803 may be connected by bus or signal lines. Various peripheral devices may be connected to peripheral interface 803 by a bus, signal line, or circuit board. Specifically, the peripheral device includes: at least one of a radio frequency circuit 804, a display screen 805, a camera assembly 806, an audio circuit 807, a positioning assembly 808, and a power supply 809.
The peripheral interface 803 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 801 and the memory 802. In some embodiments, the processor 801, memory 802, and peripheral interface 803 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 801, the memory 802, and the peripheral interface 803 may be implemented on separate chips or circuit boards, which are not limited in this application.
The Radio Frequency circuit 804 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 804 communicates with communication networks and other communication devices via electromagnetic signals. The rf circuit 804 converts an electrical signal into an electromagnetic signal to be transmitted, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 804 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuit 804 may communicate with other in-vehicle systems via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: the world wide web, metropolitan area networks, intranets, various generations of mobile communication networks (2G, 3G, 4G, and 5G), Wireless local area networks and/or WiFi (Wireless Fidelity), bluetooth networks. In this embodiment, the rf circuit 804 further includes a bluetooth component. The bluetooth module is specifically configured to perform steps 301, 305 and 312 of the method shown in fig. 3. In some embodiments, the radio frequency circuit 804 may further include NFC (Near Field Communication) related circuits, which are not limited in this application.
The display screen 805 is used for displaying image data such as a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display 805 is a touch display, the display 805 also has the ability to capture touch signals on or above the surface of the display 805. The touch signal may be input to the processor 801 as a control signal for processing. At this point, the display 805 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display 805 may be one, providing the front panel of the display device 800; in other embodiments, the display screens 805 may be at least two, respectively disposed on different surfaces of the display device 800 or in a folded design; in still other embodiments, the display 805 may be a flexible display, disposed on a curved surface or on a folding surface of the display device 800. Even further, the display 805 may be arranged in a non-rectangular irregular pattern, i.e., a shaped screen. The Display 805 can be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), and other materials.
The camera assembly 806 is used to capture images or video. Optionally, camera assembly 806 includes a front camera and a rear camera. In general, a front camera is provided on a front panel of the display device 800, and a rear camera is provided on a rear surface of the in-vehicle system. In some embodiments, the number of the rear cameras is at least two, and each rear camera is any one of a main camera, a depth-of-field camera, a wide-angle camera and a telephoto camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize panoramic shooting and VR (Virtual Reality) shooting functions or other fusion shooting functions. In some embodiments, camera assembly 806 may also include a flash. The flash lamp can be a monochrome temperature flash lamp or a bicolor temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.
The audio circuit 807 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 801 for processing or inputting the electric signals to the radio frequency circuit 804 to realize voice communication. For the purpose of stereo sound collection or noise reduction, a plurality of microphones may be provided at different portions of the display device 800. The microphone may also be an array microphone or an omni-directional pick-up microphone. The speaker is used to convert electrical signals from the processor 801 or the radio frequency circuit 804 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, the audio circuitry 807 may also include a headphone jack.
The positioning component 808 is used to position the current geographic Location of the display device 800 to implement navigation or LBS (Location Based Service). The Positioning component 808 may be a Positioning component based on the Global Positioning System (GPS) in the united states, the beidou System in china, or the galileo System in russia.
The power supply 809 is used to supply power to the various components in the display device 800. The power supply 809 can be ac, dc, disposable or rechargeable. When the power supply 809 includes a rechargeable battery, the rechargeable battery may be a wired rechargeable battery or a wireless rechargeable battery. The wired rechargeable battery is a battery charged through a wired line, and the wireless rechargeable battery is a battery charged through a wireless coil. The rechargeable battery may also be used to support fast charge technology.
In some embodiments, the display device 800 also includes one or more sensors 810. The one or more sensors 810 include, but are not limited to: acceleration sensor 811, gyro sensor 812, pressure sensor 813, fingerprint sensor 814, optical sensor 815 and proximity sensor 816.
The acceleration sensor 811 may detect the magnitude of acceleration in three coordinate axes of a coordinate system established with the display device 800. For example, the acceleration sensor 811 may be used to detect the components of the gravitational acceleration in three coordinate axes. The processor 801 may control the touch screen 805 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 811. The acceleration sensor 811 may also be used for acquisition of motion data of a game or a user.
The gyro sensor 812 may detect a body direction and a rotation angle of the display device 800, and the gyro sensor 812 may cooperate with the acceleration sensor 811 to acquire a 3D motion of the user with respect to the display device 800. From the data collected by the gyro sensor 812, the processor 801 may implement the following functions: motion sensing (such as changing the UI according to a user's tilting operation), image stabilization at the time of photographing, game control, and inertial navigation.
Pressure sensors 813 may be disposed on the side bezel of display device 800 and/or underneath touch screen display 805. When the pressure sensor 813 is disposed on the side frame of the display device 800, the holding signal of the user to the display device 800 can be detected, and the processor 801 performs left-right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 813. When the pressure sensor 813 is disposed at a lower layer of the touch display screen 805, the processor 801 controls the operability control on the UI interface according to the pressure operation of the user on the touch display screen 805. The operability control comprises at least one of a button control, a scroll bar control, an icon control and a menu control.
The fingerprint sensor 814 is used for collecting a fingerprint of the user, and the processor 801 identifies the identity of the user according to the fingerprint collected by the fingerprint sensor 814, or the fingerprint sensor 814 identifies the identity of the user according to the collected fingerprint. Upon identifying that the user's identity is a trusted identity, the processor 801 authorizes the user to perform relevant sensitive operations including unlocking a screen, viewing encrypted information, downloading software, paying for and changing settings, etc. The fingerprint sensor 814 may be disposed on the front, back, or side of the display device 800. When a physical button or a vendor Logo is provided on the display device 800, the fingerprint sensor 814 may be integrated with the physical button or the vendor Logo.
The optical sensor 815 is used to collect the ambient light intensity. In one embodiment, the processor 801 may control the display brightness of the touch screen 805 based on the ambient light intensity collected by the optical sensor 815. Specifically, when the ambient light intensity is high, the display brightness of the touch display screen 805 is increased; when the ambient light intensity is low, the display brightness of the touch display 805 is turned down. In another embodiment, the processor 801 may also dynamically adjust the shooting parameters of the camera assembly 806 based on the ambient light intensity collected by the optical sensor 815.
A proximity sensor 816, also called a distance sensor, is typically provided on the front panel of the display device 800. The proximity sensor 816 is used to collect the distance between the user and the front of the display device 800. In one embodiment, the processor 801 controls the touch display 805 to switch from the bright screen state to the dark screen state when the proximity sensor 816 detects that the distance between the user and the front surface of the display device 800 is gradually decreased; when the proximity sensor 816 detects that the distance between the user and the front surface of the display device 800 becomes gradually larger, the processor 801 controls the touch display 805 to switch from the breath screen state to the bright screen state.
Those skilled in the art will appreciate that the configuration shown in fig. 8 is not limiting of display device 800, and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components may be used.
Optionally, the data transmission method provided in this embodiment of the present application may also be applied to other devices having a bluetooth connection function, for example, a bluetooth speaker, and the structure of the data transmission method may refer to the display device shown in fig. 8, which is not described herein again.
Embodiments of the present application also provide a computer storage medium having instructions stored thereon, where the instructions, when executed by a processor, implement the data transmission method shown in fig. 2 or fig. 3.
The above description is only exemplary of the present application and is not intended to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present application are intended to be included within the scope of the present application.
Claims (8)
1. A display device for use in a bluetooth mesh network, the display device comprising:
the display screen is used for presenting image pictures;
a speaker for presenting sound data;
the processor is used for updating the time-to-live TTL in the first message to 0 to obtain a second message when the first identification set of the display device meets the target condition after the first message sent by the first node in the Bluetooth mesh network is obtained;
a Bluetooth component to broadcast the second message in the Bluetooth mesh network;
the first node is a neighbor node of the display device, the first message includes an identifier of a destination node, the first identifier set includes identifiers of all neighbor nodes of the display device, and the first identifier set satisfies a target condition, including: the first identification set comprises the identification of the destination node, and/or the first identification set only comprises the identification of the first node;
the processor is further configured to:
when the display device is not the destination node and the first identification set does not meet the target condition, acquiring all transmission paths between the display device and the destination node based on a second identification set, wherein the second identification set comprises the neighbor relation between each node in the Bluetooth mesh network;
and when a first transmission path does not exist in all the transmission paths, discarding the first message, wherein the first transmission path does not contain the first node.
2. The display device of claim 1, wherein the processor is further configured to:
when the first transmission path exists in all the transmission paths and a second node exists in the neighbor nodes of the first node, acquiring the number of neighbor nodes of the display device based on the first identifier set and acquiring the number of neighbor nodes of the second node based on the second identifier set, wherein a second transmission path exists between the second node and the destination node and does not include the first node;
discarding the first message when the number of neighboring nodes of the display device is greater than the number of neighboring nodes of any of the second nodes.
3. The display device according to claim 2,
the processor is further configured to update the TTL of the first message to obtain a third message when the number of the neighbor nodes of the display device is less than the number of the neighbor nodes of any one of the second nodes, where the TTL of the third message is less than the TTL of the first message;
the bluetooth component is further configured to broadcast the third message in the bluetooth mesh network.
4. The display device of claim 1, wherein the Bluetooth module is further configured to:
after the network distribution of the display device is finished, broadcasting a network access indicating message of the display device in the Bluetooth mesh network, wherein the network access indicating message comprises an identifier of the display device.
5. The display device according to claim 1,
the Bluetooth component is also used for receiving a network access indication message sent by a new distribution network node, wherein the network access indication message comprises an identifier of the new distribution network node;
the processor is further configured to add the identifier of the new distribution network node to the first identifier set to obtain an updated first identifier set;
the bluetooth component is further configured to broadcast a neighbor node update message in the bluetooth mesh network, where the neighbor node update message includes the identifier of the display device and the updated first identifier set.
6. The display device according to any one of claims 1 to 5, wherein the Bluetooth module is further configured to:
broadcasting an abnormal state message in the Bluetooth mesh network when the display device is in a busy state or a fault state, wherein the abnormal state message is used for indicating that the display device cannot relay messages.
7. The display device according to any one of claims 1 to 5, wherein the Bluetooth module is in a scanning state when there is no message to be sent in the display device.
8. A data transmission method for use in a bluetooth mesh network, the method comprising:
a first node receives a first message sent by a second node, wherein the first message comprises an identifier of a destination node;
when the first identification set of the first node meets a target condition, the first node updates the time-to-live TTL in the first message to 0 to obtain a second message;
the first node broadcasting the second message in the Bluetooth mesh network;
wherein the first identifier set includes identifiers of all neighbor nodes of the first node, and the first identifier set satisfies a target condition, including: the first identification set comprises the identification of the destination node, and/or the first identification set only comprises the identification of the second node.
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