CN111818571A - Response method among multiple nodes, network node and readable storage medium - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
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Abstract
The invention discloses a multi-node response method, a network node and a readable storage medium. The master node transmits a response packet after all the slave nodes transmit the complete radio packets, that is, the master node does not immediately return a response packet after receiving a radio packet transmitted from a certain slave node, but transmits a response packet including response information on whether all the radio packets transmitted from all the slave nodes have been successfully received after waiting for all the slave nodes to transmit. The invention is beneficial to reducing communication delay and increasing the throughput of the wireless network.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a multi-node response method, a network node based on the method and a readable storage medium.
Background
In recent years, wireless communication technology is widely used in various industries and daily lives of people thereof, and a wireless network has a plurality of devices, which are generally divided into a sender and a receiver according to a data transceiving role. In a wireless network, after a sender sends a wireless packet (also called a data packet or a wireless data packet) to a receiver, the receiver needs to send an acknowledgement packet back to the sender, where the acknowledgement packet includes an Acknowledgement Character (ACK) and is used to confirm whether the receiver successfully receives the wireless packet sent by the sender. The response packet occupies the system communication bandwidth, increases the communication delay and reduces the throughput of the whole wireless network.
Disclosure of Invention
In view of the above, the present invention provides a multi-node response method, a network node, and a readable storage medium, so as to solve the problems of the response packet occupying the system communication bandwidth, increasing the communication delay, and reducing the throughput of the wireless network.
The invention provides a response method among multiple nodes, which comprises the following steps:
the master node receives wireless packets sent by a plurality of slave nodes;
after all the slave nodes transmit all the wireless packets, the master node transmits an acknowledgement packet for informing all the slave nodes whether the wireless packet of each of the slave nodes is successfully received by the master node.
Optionally, the receiving, by the master node, a wireless packet transmitted by a plurality of slave nodes includes:
the master node receives one wireless packet from each slave node in turn and turns to receive in a predetermined order until all slave nodes transmit a complete portion of the wireless packet.
Optionally, the receiving, by the master node, a wireless packet transmitted by a plurality of slave nodes includes:
the master node receives all wireless packets to be transmitted from each slave node in turn until all slave nodes send all wireless packets to be transmitted respectively.
The invention provides a response method among multiple nodes, which comprises the following steps:
a plurality of slave nodes transmitting wireless packets to a master node;
and after all the slave nodes transmit all the wireless packets, receiving a response packet transmitted by the master node, wherein the response packet is used for informing whether the wireless packets of all the slave nodes are successfully received by the master node or not.
Optionally, the sending, by the plurality of slave nodes, a wireless packet to the master node includes:
each slave node transmits one wireless packet at a time to the master node and transmits in turn according to a predetermined order until all slave nodes transmit a complete portion of the wireless packet.
Optionally, the sending, by the plurality of slave nodes, a wireless packet to the master node includes:
each slave node sends all wireless packets to be transmitted to the master node once until all slave nodes send all wireless packets to be transmitted respectively.
Optionally, the sending, by the plurality of slave nodes, a wireless packet to the master node includes:
each slave node obtaining a time period for which transmission of a wireless packet is permitted;
each slave node transmits a respective wireless packet to the master node during a respective time period.
Optionally, the time periods of the slave nodes are different and are configured in advance or dynamically in real time.
The invention provides a network node comprising a memory and a processor, the memory storing a program for execution by the processor to perform one or more steps of the answering method according to any one of the preceding claims.
The invention provides a readable storage medium storing a program for execution by a processor to perform one or more steps of any of the above answering methods.
The master node transmits a response packet only after all the slave nodes transmit all the wireless packets, that is, the master node does not immediately return a response packet after receiving the wireless packet transmitted by a certain slave node, but transmits a response packet only after all the slave nodes transmit the wireless packet, wherein the response packet includes response information whether all the wireless packets transmitted by all the slave nodes are successfully received. Compared with the prior art, the invention only sends one response packet, the number of the response packets is less, the occupied system communication bandwidth is less, and the invention is beneficial to reducing the communication delay and increasing the throughput of the wireless network.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is an interaction diagram of a conventional one-to-one answering mechanism;
FIG. 2 is an interaction diagram of a conventional block reply mechanism;
FIG. 3 is a diagram illustrating interaction of a conventional one-to-one answering mechanism among multiple nodes;
FIG. 4 is a flowchart illustrating an inter-node reply method according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating response interactions among multiple nodes according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating response interactions among multiple nodes according to another embodiment of the present invention;
FIG. 7 is a schematic diagram of time slot allocation of each node according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a network node according to an embodiment of the present invention.
Detailed Description
A conventional wireless response mechanism is generally a one-to-one response mechanism, and please refer to fig. 1, taking a data interaction scenario of two nodes, namely a node a and a node B as an example, in a wireless communication process of the two nodes, the node a sends a wireless packet 1 to the node B, the node B sends a response packet 1 after receiving the wireless packet 1, the node a sends a next wireless packet 2, the node B sends a response packet 2 after receiving the wireless packet 2, and so on, the node B sends a response packet to the node a after receiving a wireless packet sent by the node a until the node a sends the last wireless packet N, and the node B sends a response packet N after receiving the wireless packet N. The number N of the wireless packets is a positive integer.
In a conventional one-to-one response mechanism, a node B as a receiver sends out a response packet every time it receives a wireless packet, and the number of response packets in one data interaction service is large, occupying more communication bandwidth, undoubtedly increasing communication delay, and greatly reducing throughput of a wireless network system. In view of this, a block acknowledgement (BlockACK) mechanism is proposed in the industry, as shown in fig. 2, after node a sends multiple wireless packets, node B returns an acknowledgement packet for feeding back whether node B successfully receives the multiple wireless packets sent by node a. It should be understood that the node a shown in fig. 2 sends out four wireless packets as an exemplary illustration, and the number of wireless packets sent out by each node should be set according to the actual application requirements.
When a plurality of wireless packets come from different nodes, based on the aforementioned acknowledgement mechanism of fig. 2, the receiving node still generates a larger number of acknowledgement packets to send an acknowledgement packet to each sending node. Taking the data exchange example of one master node and four slave nodes, where the master node is a receiving node and the slave node is a transmitting node, as shown in fig. 3, the master node B receives wireless packets from the slave node 1, the slave node 2, the slave node 3, and the slave node 4, and when receiving the wireless packet transmitted from the slave node 1, the master node B sends out the response packet 1 to the slave node 1, when receiving the wireless packet transmitted from the slave node 2, the master node B sends out the response packet 2 to the slave node 2, when receiving the wireless packet transmitted from the slave node 3, the master node B sends out the response packet 3 to the slave node 3, and when receiving the wireless packet transmitted from the slave node 4, the master node B sends out the response packet 4 to the slave node 4. In this case, if the slave node sends a plurality of wireless packets, the master node responds to the plurality of wireless packets of the slave node based on the block response mechanism, which still generates a large number of response packets, occupies a large communication bandwidth, and undoubtedly increases the communication delay, thereby greatly reducing the throughput of the wireless network system.
In view of the above, embodiments of the present invention provide a multi-node response method to solve the problem. The technical solutions of the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step, based on the following individual embodiments, fall within the scope of protection of the present invention. The following embodiments and their technical features may be combined with each other without conflict.
Referring to fig. 4, the response method may include the following steps S11 to S12.
S11: a plurality of slave nodes transmit wireless packets to a master node.
S12: after all the slave nodes transmit all the wireless packets, the master node transmits an acknowledgement packet for informing all the slave nodes whether the wireless packet of each of the slave nodes is successfully received by the master node.
Taking data interaction between a master node and four slave nodes as an example, where the master node is a receiving node and the slave nodes are transmitting nodes, as shown in fig. 5, a wireless network includes a master node and a plurality of slave nodes, and the number N of the slave nodes may be 1,2 or other positive integers, and for convenience of description, these slave nodes are respectively identified as slave devices 1,2, …, where N and N are positive integers in the present disclosure. In the signal transmission range of the master node, the master node and each slave node adopt communication protocols supported by both sides to carry out data interaction; the master node and the slave node can respectively perform data interaction with a remote server through a mobile communication network. The embodiment of the invention does not limit the equipment types of the nodes, the protocols and networking structures of the mobile communication network and the specific implementation modes of the server.
The master node and the slave nodes 1,2, …, N may be electronic devices in practical application scenarios, and the specific expression form thereof may be mobile devices such as smart phones, PDAs (Personal digital assistants or tablet computers), and may also be wearable devices having corresponding functions and being wearable on limbs or embedded in clothes, jewelry, accessories, and the like.
Referring to fig. 5, the master node is a receiving node, the slave node is a transmitting node, the master node receives wireless packets from the slave nodes 1,2, …, N, and does not immediately send a response packet to the slave node 1 after receiving the wireless packet sent by the slave node 1, does not immediately send a response packet to the slave node 2 after receiving the wireless packet sent by the slave node 2, does not immediately send a response packet to the slave node 3 after receiving the wireless packet sent by the slave node 3, and so on until the master node receives all the wireless packets sent by the slave nodes 1,2, …, N, and then sends a response packet.
That is, after receiving a wireless packet sent by a certain node, the master node does not immediately return a reply packet, but sends a single reply packet after all the sending nodes (from the slave node 1 to the slave node N) have sent the packet. Compared with the prior art shown in fig. 1 to fig. 3, the embodiment of the present invention only sends one response packet, and has a small number, occupies a small system communication bandwidth, and is beneficial to reducing communication delay and increasing wireless network throughput.
The response packet is sent to all the slave nodes, and contains response information on whether all the wireless packets sent by all the slave nodes are successfully received, so as to inform all the slave nodes whether the wireless packets sent by the slave nodes are successfully received by the master node. The conventional acknowledgement packet only contains acknowledgement information as to whether the wireless packet sent from the single slave node is successfully received, and is used to inform the single slave node whether the wireless packet sent from the single slave node is successfully received by the master node. Here, the frame content of the embodiment of the present invention is different from that of the conventional response packet.
In a practical application scenario, the reply packet may be considered to be a broadcast packet transmitted in a wireless manner, which may be received by a plurality of nodes (e.g., the aforementioned slave nodes). The response packet includes fields such as a frame header (preamble), an access code (access address), a control code, a Payload (PDU), and a Cyclic Redundancy Check (CRC). Wherein:
the header may be a byte or several bytes, and is used for synchronization (e.g., signal strength, frequency synchronization, etc.) of the receiving node with the transmitting node. The access code is used to authenticate each receiving node in the wireless network to determine whether each receiving node is associated with the wireless network, and only receiving nodes using the same access code as the access code of an over-the-air wireless packet can receive the wireless packet. The control code is used for telling the receiving node about the length of the load, whether the load has coding protection and other information. The payload is the portion of the payload data in the wireless packet transmission that includes the response character. The cyclic redundancy check code is used for detecting or checking whether the load transmission is wrong.
The position of the response character in the response packet, such as whether the response character is placed in the front segment or the rear segment of the PDU, is not limited in the embodiments of the present invention, and only needs to meet the actual transmission requirement.
In the embodiment shown in fig. 5, the master node receives one wireless packet from each slave node in turn and turns to receive in a predetermined order until all slave nodes transmit a complete portion of the wireless packet. In practical application, each slave node may also transmit a plurality of wireless packets, and for this reason, each slave node transmits all the wireless packets to be transmitted to the master node at a single time, and the master node does not return a single acknowledgement packet until all the slave nodes have transmitted all the wireless packets to be transmitted.
Referring to fig. 6, where the master node is a receiving node, the slave node is a transmitting node, the master node receives wireless packets from the slave nodes 1,2, …, N, the slave node 1 sequentially transmits a plurality of wireless packets, such as wireless packet 1, wireless packet 2, and wireless packet 3, after receiving the 3 wireless packets, the master node does not immediately send out a response packet to the slave node 1, but continues to receive the wireless packet sent by the slave node 2, such as wireless packet 4, and so on, until the master node receives all the wireless packets sent by the slave nodes 1,2, …, N, the master node does not send out a response packet.
That is, the master node does not immediately return a reply packet after receiving all wireless packets transmitted from a slave node, but transmits a single reply packet after all transmitting nodes (from the slave node 1 to the slave node N) have transmitted. Compared with the prior art shown in fig. 1 to fig. 3, the embodiment of the present invention only sends one response packet, and has a small number, occupies a small system communication bandwidth, and is beneficial to reducing communication delay and increasing wireless network throughput.
One difficulty in multi-node wireless communication is that an air conflict may occur, taking the application scenario of fig. 5 as an example, the slave node 2 may start to transmit the wireless packet 4 when the slave node 1 has not transmitted the wireless packets 1 to 3, which may cause the group response mechanism to work inefficiently.
Referring to fig. 7, the wireless network system allocates a time period to each slave node, the time period is used for limiting that a certain slave node can only transmit a wireless packet in the time period, each slave node sequentially transmits a respective wireless packet to the master node in the respective time period, and after the transmission of each slave node is finished, the master node transmits a response packet back in the allocated response time period. Then, by analogy, a new round of the aforementioned sending and receiving operations is started.
The time period allocated by each slave node may be different in length, and the time period may be configured in advance or dynamically configured in real time in the data interaction service process.
Fig. 8 is a schematic structural diagram of a network node according to an embodiment of the present invention. The network node 80 comprises a processor 81 and a memory 82, the processor 81 and the memory 82 being connectable for data or signal transmission via a communication bus 83.
The processor 81 is a control center of the network node 80, connects various parts of the entire network node 80 by various interfaces and lines, and performs various functions of the network node 80 and processes data by running or loading a program stored in the memory 82 and calling data stored in the memory 82, thereby performing overall monitoring of the network node 80.
The processor 81 loads instructions corresponding to one or more processes of the program into the memory 82, and the processor 81 executes the program stored in the memory 82, so as to implement one or more of the following functions:
a plurality of slave nodes transmitting wireless packets to the master node, an
After all the slave nodes transmit all the wireless packets, the master node transmits an acknowledgement packet for informing all the slave nodes whether the wireless packet of each of the slave nodes is successfully received by the master node.
For the specific implementation manner of each step, that is, the specific content of the step executed by the processor 51 calling the program, reference may be made to the foregoing embodiments, and details are not described here.
It should be understood that, when implemented in a practical application scenario, the execution bodies of the above steps may not be the processor 81 and the memory 82, but may be implemented by other modules and units respectively, according to the device type of the network node 80.
It will be understood by those skilled in the art that all or part of the steps in the methods of the above embodiments may be performed by instructions or by related hardware controlled by the instructions, which may be stored in a readable storage medium and loaded and executed by a processor. To this end, the embodiment of the present invention provides a readable storage medium, which stores a plurality of instructions that can be loaded by a processor to execute one or more steps of any one of the inter-node response methods provided by the embodiment of the present invention.
The readable storage medium may include a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic or optical disk, and the like.
Since the instructions stored in the readable storage medium can execute the steps in any multi-node response method provided in the embodiment of the present invention, beneficial effects that can be achieved by any multi-node response method provided in the embodiment of the present invention can be achieved, for details, see the foregoing embodiments, and are not described herein again.
Although the invention has been shown and described with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art based upon a reading and understanding of this specification and the annexed drawings. The present invention includes all such modifications and variations, and is supported by the technical solutions of the foregoing embodiments. In particular regard to the various functions performed by the above described components, the terms used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (e.g., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary implementations of the specification.
That is, the above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, such as the combination of technical features between the embodiments, or the direct or indirect application to other related technical fields, are included in the scope of the present invention.
In addition, in the description of the foregoing embodiments, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Further, although the respective steps in the flowcharts of the above-described embodiments are sequentially displayed as indicated by arrows, the steps are not necessarily sequentially executed in the order indicated by the arrows. The steps are not performed in a strict order unless explicitly stated herein, but may be performed in other orders. Moreover, at least some of the steps in the figures may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, in different orders, and may be performed in turn or alternating with at least some of the other steps or sub-steps of the other steps.
Claims (10)
1. An acknowledgement method between a plurality of nodes, the acknowledgement method comprising:
the master node receives wireless packets sent by a plurality of slave nodes;
after all the slave nodes transmit all the wireless packets, the master node transmits an acknowledgement packet for informing all the slave nodes whether the wireless packet of each of the slave nodes is successfully received by the master node.
2. The acknowledgement method according to claim 1, wherein the master node receives wireless packets transmitted from a plurality of slave nodes, and includes:
the master node receives one wireless packet from each slave node in turn and turns to receive in a predetermined order until all slave nodes transmit a complete portion of the wireless packet.
3. The acknowledgement method according to claim 1, wherein the master node receives wireless packets transmitted from a plurality of slave nodes, and includes:
the master node receives all wireless packets to be transmitted from each slave node in turn until all slave nodes send all wireless packets to be transmitted respectively.
4. An acknowledgement method between a plurality of nodes, the acknowledgement method comprising:
a plurality of slave nodes transmitting wireless packets to a master node;
and after all the slave nodes transmit all the wireless packets, receiving a response packet transmitted by the master node, wherein the response packet is used for informing whether the wireless packets of all the slave nodes are successfully received by the master node or not.
5. The acknowledgement method of claim 4, wherein the plurality of slave nodes transmitting wireless packets to the master node comprises:
each slave node transmits one wireless packet at a time to the master node and transmits in turn according to a predetermined order until all slave nodes transmit a complete portion of the wireless packet.
6. The acknowledgement method of claim 4, wherein the plurality of slave nodes transmitting wireless packets to the master node comprises:
each slave node sends all wireless packets to be transmitted to the master node once until all slave nodes send all wireless packets to be transmitted respectively.
7. The acknowledgement method of claim 4, wherein the plurality of slave nodes transmitting wireless packets to the master node comprises:
each slave node obtaining a time period for which transmission of a wireless packet is permitted;
each slave node transmits a respective wireless packet to the master node during a respective time period.
8. The answering method according to claim 7, wherein the time period of each slave node is different and is pre-configured or dynamically configured in real time.
9. A network node, characterized in that the network node comprises a memory and a processor, the memory storing a program for execution by the processor to perform one or more steps of the answering method according to any one of claims 1-3 or 4-8.
10. A readable storage medium storing a program for execution by a processor to perform one or more steps of the answering method according to any one of claims 1-3 or 4-8.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000013859A (en) * | 1998-06-24 | 2000-01-14 | Ntt Mobil Communication Network Inc | Transmission confirmation system and method for information distribution service |
| CN105471553A (en) * | 2014-09-12 | 2016-04-06 | 中兴通讯股份有限公司 | Method for realizing parallel multi-user data transmission and main node |
| US20180098263A1 (en) * | 2016-09-30 | 2018-04-05 | Inplay Technologies LLC | Methods and systems for low latency wireless communication with a scalable hierarchial architecture |
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2020
- 2020-05-26 CN CN202010455107.0A patent/CN111818571A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000013859A (en) * | 1998-06-24 | 2000-01-14 | Ntt Mobil Communication Network Inc | Transmission confirmation system and method for information distribution service |
| CN105471553A (en) * | 2014-09-12 | 2016-04-06 | 中兴通讯股份有限公司 | Method for realizing parallel multi-user data transmission and main node |
| US20180098263A1 (en) * | 2016-09-30 | 2018-04-05 | Inplay Technologies LLC | Methods and systems for low latency wireless communication with a scalable hierarchial architecture |
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Application publication date: 20201023 |