WO2018210231A1

WO2018210231A1 - Data transmitting method and receiving method, and data transmitting device and receiving device

Info

Publication number: WO2018210231A1
Application number: PCT/CN2018/086868
Authority: WO
Inventors: 苏莹莹; 田兴龙
Original assignee: 青岛海尔股份有限公司; 北京一数科技有限公司
Priority date: 2017-05-16
Filing date: 2018-05-15
Publication date: 2018-11-22
Also published as: CN107346981A

Abstract

Provided in embodiments of the present invention are a data transmitting method and receiving method, and a data transmitting device and receiving device. The transmitting method comprises: obtaining data and determining the length of the data; dividing the data into a plurality of data packets arranged in order; adding a first identifier to a first data packet of the plurality of data packets arranged in order; adding a second identifier to the plurality of data packets arranged in order; and sequentially transmitting the data packets provided with the identifiers. The receiving method comprises: receiving the plurality of data packets arranged in order provided with the identifiers; determining the total data length as first length information by means of the first identifier in the plurality of data packets; sequentially determining whether each data packet is the last data packet by means of the second identifier in the plurality of data packets arranged in order; if a packet is determined to be the last data packet, combining the plurality of data packets arranged in order into a data item; and comparing the length of the combined data item with the first length information, and determining, according to the comparison result, whether the combined data item is complete.

Description

Data transmitting method, receiving method, data transmitting device, and receiving device

The present application claims the priority of the Chinese patent application entitled "Data Transmission Method, Receiving Method, Data Transmission Device, and Receiving Device" on May 16, 2017, the application number is 201710344810.2, the entire contents of which are incorporated by reference. Combined in this application.

Technical field

The present invention relates to the field of network communication technologies, and in particular, to a data transmission method, a reception method, a data transmission device, and a reception device.

Background technique

BLE (Bluetooth Low Energy) transmission technology is a low-cost, short-distance, interoperable wireless technology. The biggest feature of BLE technology is its ultra-low power consumption, which can greatly reduce the data transmission of mobile devices. Power consumption.

When the existing BLE technology transmits large data, the big data is data-cut and divided into several small data packets for transmission. However, the transmission time of the data transmission method is relatively long. When the environment is disturbed or the signal is unstable, the transmission data is prone to packet loss, which makes it difficult to determine when the data reception is completed when receiving the data, and thus the integrity of the received data cannot be guaranteed. Sex.

Summary of the invention

An object of the embodiments of the present invention is to provide a data sending method, a receiving method, a data transmitting apparatus, and a receiving apparatus, so as to ensure integrity of BLE transmission and reception data. The specific technical solutions are as follows:

A data sending method is applied to a transmitting end of data transmission through a BLE protocol, including:

Obtaining data and determining length information of the data;

Splitting the data into a plurality of sequentially arranged data packets, wherein the plurality of sequentially arranged data packets are equal in size;

Adding a first identifier to the first data packet of the plurality of sequentially arranged data packets, where the first identifier is used to indicate length information of the data;

Adding a second identifier to each data packet of the plurality of sequentially arranged data packets, where the second identifier is used to indicate whether the data packet is the last data in the plurality of sequentially arranged data packets package;

And sequentially sending the plurality of sequentially arranged data packets after the identification process, so that the receiving end receives the plurality of sequentially arranged data packets.

Preferably, the adding the first identifier to the first data packet of the plurality of sequentially arranged data packets includes:

Adding a first identifier to a header of the first data packet of the plurality of sequentially arranged data packets;

The adding the second identifier to each of the data packets of the plurality of sequentially arranged data packets includes:

Adding a second identifier to a header of each data packet of the plurality of sequentially arranged data packets.

A data receiving method is applied to a receiving end of data transmission through a BLE protocol, including:

Receiving a plurality of sequentially arranged data packets after being marked and processed;

Determining, by the first identifier in the plurality of sequentially arranged data packets, a total data length included in the plurality of sequentially arranged data packets as first length information;

Determining, by the second identifier of the plurality of sequentially arranged data packets, whether each data packet in the plurality of sequentially arranged data packets is the last data packet;

When it is determined as the last data packet, the plurality of sequentially arranged data packets are combined into data;

Comparing the combined data length and the first length information, determining whether the combined data is complete according to the comparison result.

Preferably, the combining the plurality of sequentially arranged data packets into data includes:

And removing the first identifier and the second identifier in the plurality of sequentially arranged data packets, and combining the removed data packets into data.

Preferably, the comparison of the combined data length and the first length information, and determining whether the combined data is complete according to the comparison result, specifically includes:

Calculating the length of the combined data as the second length information;

Comparing the first length information and the second length information, if the first length information and the second length information are consistent, determining that the received data is complete;

If the first length information does not coincide with the second length information, it is determined that the received data is incomplete.

A data transmitting apparatus, wherein the data transmitting apparatus performs data transmission by using a BLE protocol, including:

An obtaining module, configured to acquire data and determine length information of the data;

a splitting module, configured to split the data into a plurality of sequentially arranged data packets, wherein the plurality of sequentially arranged data packets are equal in size;

a first adding module, where a first identifier is added to the first data packet of the plurality of sequentially arranged data packets, where the first identifier is used to indicate length information of the data;

a second adding module, configured to add a second identifier to each data packet of the plurality of sequentially arranged data packets, where the second identifier is used to indicate whether the data packet is in the plurality of sequentially arranged The last packet in the packet;

And a sending module, configured to sequentially send the plurality of sequentially arranged data packets after the identifier processing, so that the receiving end receives the plurality of sequentially arranged data packets.

Preferably, the first adding module is specifically configured to:

The second adding module is specifically configured to:

A data receiving device, wherein the data receiving device performs data transmission by using a BLE protocol, including:

a receiving module, configured to receive the plurality of sequentially arranged data packets after being identified by the identifier;

a determining module, configured to determine, by using the first identifier in the plurality of sequentially arranged data packets, a total length of data included in the plurality of sequentially arranged data packets as first length information;

a determining module, configured to sequentially determine, by the second identifier in the plurality of sequentially arranged data packets, whether each data packet in the plurality of sequentially arranged data packets is the last data packet;

a combination module, configured to combine the plurality of sequentially arranged data packets into data when determining the last data packet;

The comparison module is configured to compare the combined data length and the first length information, and determine whether the combined data is complete according to the comparison result.

Preferably, the combination module is specifically configured to:

Preferably, the comparison module is specifically configured to:

Calculating the length of the combined data as the second length information;

The data transmitting method, the receiving method, the data transmitting apparatus, and the receiving apparatus provided by the embodiment of the present invention add a first identifier for indicating length information of the data in the first data packet of the plurality of sequentially arranged data packets. And adding a second identifier to indicate whether it is the last data packet in each data packet of a plurality of sequentially arranged data packets can ensure the integrity when transmitting and receiving data through BLE. Of course, any product or method embodying the present invention necessarily does not necessarily require all of the advantages described above to be achieved at the same time.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

FIG. 1 is a schematic flowchart diagram of a data sending method according to an embodiment of the present invention;

2 is another schematic flowchart of a data sending method according to an embodiment of the present invention;

FIG. 3 is a schematic flowchart diagram of a data receiving method according to an embodiment of the present invention; FIG.

4 is a schematic structural diagram of a data transmitting apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a data receiving apparatus according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic structural diagram of a data transceiver apparatus according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Method embodiment 1

A specific embodiment of a data sending method provided by the embodiment of the present invention is applied to a transmitting end, such as a mobile terminal, a smart watch, and a smart bracelet, for transmitting data through a BLE protocol. Referring to FIG. 1, FIG. 1 is a present invention. A schematic flowchart of a data sending method of an embodiment, including:

S101. Acquire data and determine length information of the data.

In a possible embodiment of the present invention, the acquired data may include, but is not limited to, text, pictures, video, audio, files, numbers, and the like. After the sender obtains the data, the length of the data is confirmed, where the length information of the data refers to the amount of data of the data. Taking a picture obtained as an example, assume that the actual data size of the picture is 300 KB, that is, the length information of the picture data is 300 KB.

Optionally, determining the length information of the data may be confirmed by the attribute information of the data itself. Specifically, the obtained audio may have a size of 4 MB in the attribute information, and the system may directly read the data. Attribute information and determine the length information of the audio is 4MB.

Alternatively, the length information of the data can also be confirmed by directly calculating the size of the data. For example, if a certain piece of text is obtained, the number of bits occupied by each character is calculated, and then the total number of bits of the piece of text is calculated, and the length information of the piece of text is determined.

S102. Split the data into a plurality of data packets arranged in order.

After determining the length information of the data, the data can be split into multiple data packets to facilitate data transmission through the BLE protocol. The BLE protocol stipulates that the data packets are sent sequentially and sequentially. However, during the transmission process, packet loss may occur due to signal instability, signal interference, etc., causing the receiving end to be unable to determine when the data is received and the data cannot be determined. The accuracy.

S103. Add a first identifier to a first data packet of the plurality of sequentially arranged data packets, where the first identifier is used to indicate length information of the data.

In the embodiment of the present invention, the first identifier serves to indicate the length information of the data. Optionally, the first identifier is added to the first data packet of the plurality of sequentially arranged data packets. In order to receive the data packet when the receiving end, the total size of the data of the data to be received can be known for the first time. The first identifier may specifically be: a 2-byte character containing length information of the data. Of course, multiple bytes of characters can also be used as the first identifier. However, since the size of each data packet is fixed, as the number of bytes occupied by the first identifier increases, the number of data packets split by the same data is Will increase. Therefore, preferably, the embodiment of the present invention minimizes the space occupied by the first identifier on the premise of ensuring the data length information. In addition, in general, the first identity is added to the packet header structure of the packet.

S104. Add a second identifier to each data packet of the plurality of sequentially arranged data packets, where the second identifier is used to indicate whether the data packet is the last data packet in the plurality of sequentially arranged data packets.

In the embodiment of the present invention, the second identifier serves to indicate whether the data packet is the last data packet in the plurality of sequentially arranged data packets, and the second identifier may be a group of character strings having the feature information. For example, it may specifically be: 0x02 as the identifier of the non-last packet; 0x82 as the identifier of the last packet. The above example is not limited to the second identification pattern of the embodiment of the present invention. It is within the protection scope of the embodiment of the present invention as long as it can satisfy whether the last data packet is distinguished among the feature information included in the second identifier. In addition, in general, the second identifier is added to the header structure of each packet of a plurality of sequentially arranged data packets.

S105. The plurality of sequentially arranged data packets are sequentially sent, so that the receiving end receives the plurality of sequentially arranged data packets.

According to the BLE transmission protocol, the plurality of sequentially arranged data packets processed by the identification are sequentially sent to the receiving end in sequence.

Embodiment 1 of the method of the present invention adds a first identifier for indicating length information of data and a data of a plurality of data packets arranged in order by adding a first data packet of a plurality of sequentially arranged data packets. The second identifier added to the packet to indicate whether it is the last packet can guarantee the integrity when sending data through BLE.

Method embodiment two

Another embodiment of the data sending method provided by the embodiment of the present invention is applied to a transmitting end, such as a mobile terminal, a smart watch, and a smart wristband, for transmitting data through the BLE protocol. Referring to FIG. 2, FIG. 2 is Another flow diagram of a data transmission method according to an embodiment of the invention includes:

S201. Acquire data and determine length information of the data.

S202. Split the data packet into a plurality of data packets of the same size arranged in order.

S203. Add a first identifier to the first data packet of the plurality of data packets of the same size, wherein the first identifier is used to indicate length information of the data.

S204. Add a second identifier to each of the plurality of sequentially arranged data packets of the same size, where the second identifier is used to indicate whether the data packet is the last one of the plurality of sequentially arranged data packets. .

S205. Transmit the identified plurality of data packets in the same order, so that the receiving end receives the plurality of sequentially arranged data packets.

Splitting a packet into multiple sequential packets of the same size helps to improve the efficiency of splitting packets. According to the limitation of each transmission length of the BLE protocol, for example, it may specifically be: splitting each data packet into 150 bytes.

Embodiment 2 of the method of the present invention, by splitting a data packet into a plurality of data packets of the same size arranged in order, because each data packet defines the same size, the system does not need to be based on different data contents. Splitting into packets of different sizes helps to improve the efficiency of splitting packets.

Method embodiment three

A specific embodiment of a data receiving method provided by the embodiment of the present invention is applied to a receiving end for data transmission through a BLE protocol, such as a mobile terminal, a smart watch, a smart bracelet, and FIG. 3, which is the present invention. A schematic flowchart of a data receiving method of an embodiment, including:

S301. Receive a plurality of sequentially arranged data packets after the identifier processing.

According to the BLE transmission protocol, the receiving end sequentially receives the plurality of sequentially arranged data packets that are sent by the transmitting end and are sequentially processed.

S302. Determine, by using the first identifier in the plurality of sequentially arranged data packets, that the total data length included in the plurality of sequentially arranged data packets is the first length information.

Since the first identifier plays the role of indicating the length information of the data, the receiving end can read the length information of the entire data indicated by the first identifier by reading the first identifier in the received data packet.

Optionally, the receiving end reads the length information of the entire data indicated by the first identifier by reading the first identifier in the received first data packet, and records the first length information. In this way, the receiving end can already determine the size of the data to be received when the first data packet is received.

S303. Determine, by using the second identifier in the plurality of sequentially arranged data packets, whether each of the plurality of sequentially arranged data packets is the last data packet.

The receiving end sequentially receives the data packet and reads the second identifier in each data packet. For example, when 0x02 is used as the identifier of the non-last packet, and 0x82 is used as the identifier of the last packet, the receiving end reads the information of 0x02 in the second identifier of a certain packet, because 0x02 indicates that it is not the last. The identifier of a data packet, the receiving end can know that the data has not been received yet, and continues to receive the data packet; when the receiving end reads the information of 0x82 in the second identifier of the last data packet, because 0x82 represents the last data. With the identification of the packet, the receiving end can know that the data has been received. Therefore, the receiving end can determine when the data has been received. In practical applications, there is no transmission that has been interrupted, but the receiver also shows that it is receiving.

S304. When it is determined as the last data packet, the plurality of sequentially arranged data packets are combined into data.

After the data packet is received, the receiver will reassemble all the received data packets into data for use.

Optionally, the receiving end removes the first identifier in the first data packet, and removes the second identifier in each data packet to obtain pure data.

Alternatively, optionally, the receiving end directly ignores the first identifier and the second identifier, directly extracts the content in each data packet and reassembles the data into data.

S305. Compare the combined data length and the first length information, and determine, according to the comparison result, whether the combined data is complete.

After the receiving end reassembles the received data packets into data, the length of the combined data is calculated, and compared with the first length information, thereby determining the integrity of the received data.

The length of the combined data is compared with the first length information to determine the integrity of the received data. Optionally, the receiving end calculates the length of the combined data, and records it as the second length information. By comparing the previously obtained first length information with the second length information, it can be determined whether the received data is complete. If the first length information and the second length information are consistent, the received data is incomplete; if not, the received data is incomplete.

In the third embodiment of the method, the receiving end determines the total data length information received by using the first identifier in the received data packet, and determines whether each data packet is the last data packet by using the second identifier in the received data packet. The receiving end can ensure that the data reception is completed. By comparing the length of the combined data with the first length information, it is determined whether the received data is consistent with the length of the transmitted data, and the integrity of the received data is ensured.

Device embodiment 1

A specific embodiment of the data sending apparatus provided by the embodiment of the present invention corresponds to the flow shown in FIG. 1. Referring to FIG. 4, FIG. 4 is a schematic structural diagram of a data sending apparatus according to an embodiment of the present invention, including:

The obtaining module 401 is configured to acquire data and determine length information of the data.

The splitting module 402 is configured to split the data into a plurality of sequentially arranged data packets.

The first adding module 403 adds a first identifier to the first data packet of the plurality of sequentially arranged data packets, where the first identifier is used to indicate length information of the data.

a second adding module 404, configured to add a second identifier to each data packet of the plurality of sequentially arranged data packets, where the second identifier is used to indicate whether the data packet is the last data in the plurality of sequentially arranged data packets package.

The sending module 405 is configured to sequentially send the plurality of sequentially arranged data packets after the identifier processing, so that the receiving end receives the plurality of sequentially arranged data packets.

The splitting module 402 is further configured to: split the data into a plurality of data packets of the same size arranged in order.

The first adding module 403 is specifically configured to: add a first identifier in a header of the first data packet of the plurality of sequentially arranged data packets.

The second adding module 404 is specifically configured to: add a second identifier to a header of each data packet of the plurality of sequentially arranged data packets.

The data transmitting apparatus provided in Embodiment 1 of the present invention is used to implement the sending of the data sending method provided by Embodiment 1 of the method of the present invention, and the implementation principle and technical effects thereof are similar, and details are not described herein again.

Device embodiment 2

A specific embodiment of the data receiving apparatus provided by the embodiment of the present invention corresponds to the flow shown in FIG. 3, and FIG. 5 is a schematic structural diagram of a data receiving apparatus according to an embodiment of the present invention, including:

The receiving module 501 is configured to receive, by the identifier processing, a plurality of sequentially arranged data packets;

The determining module 502 is configured to determine, by using the first identifier in the plurality of sequentially arranged data packets, that the total data length included in the plurality of sequentially arranged data packets is the first length information;

The determining module 503 is configured to sequentially determine, by using the second identifier in the plurality of sequentially arranged data packets, whether each data packet in the plurality of sequentially arranged data packets is the last data packet;

The combining module 504 is configured to combine the plurality of sequentially arranged data packets into data when determining the last data packet;

The comparison module 505 is configured to compare the combined data length and the first length information, and determine, according to the comparison result, whether the combined data is complete.

The combination module 504 is specifically configured to: remove the first identifier and the second identifier in the plurality of sequentially arranged data packets, and combine the removed data packets into data.

The comparison module 505 is specifically configured to:

Calculating the length of the combined data as the second length information;

The data receiving apparatus provided in the second embodiment of the present invention is used to implement the data receiving method provided by the second embodiment of the present invention. The implementation principle and technical effects are similar, and details are not described herein again.

Device embodiment three

A specific embodiment of a data transceiver device according to an embodiment of the present invention is described with reference to FIG. 6. FIG. 6 is a schematic structural diagram of a data transceiver device according to an embodiment of the present invention, including a transmitting end and a receiving end, where the data receiving and transmitting apparatus specifically includes:

The data transceiver device provided in Embodiment 3 of the device of the present invention is used for transmitting data through the BLE protocol, and can ensure integrity when transmitting and receiving data through BLE.

It should be noted that, in this context, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply such entities or operations. There is any such actual relationship or order between them. Furthermore, the term "comprises" or "comprises" or "comprises" or any other variations thereof is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device that comprises a plurality of elements includes not only those elements but also Other elements, or elements that are inherent to such a process, method, item, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

The various embodiments in the present specification are described in a related manner, and the same or similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalents, improvements, etc. made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

A data transmitting method, which is applied to a transmitting end for data transmission by a BLE Bluetooth low energy protocol, the method comprising:

Obtaining data and determining length information of the data;

Splitting the data into a plurality of sequentially arranged data packets, wherein the plurality of sequentially arranged data packets are equal in size;

Adding a first identifier to the first data packet of the plurality of sequentially arranged data packets, where the first identifier is used to indicate length information of the data;

Adding a second identifier to each data packet of the plurality of sequentially arranged data packets, where the second identifier is used to indicate whether the data packet is the last data in the plurality of sequentially arranged data packets package;

And sequentially sending the plurality of sequentially arranged data packets after the identification process, so that the receiving end receives the plurality of sequentially arranged data packets.
The data transmission method according to claim 1, wherein the adding the first identifier to the first data packet of the plurality of sequentially arranged data packets comprises:

Adding a first identifier to a header of the first data packet of the plurality of sequentially arranged data packets;

The adding the second identifier to each of the data packets of the plurality of sequentially arranged data packets includes:

Adding a second identifier to a header of each data packet of the plurality of sequentially arranged data packets.
A data receiving method, which is applied to a receiving end for data transmission by a BLE Bluetooth low energy protocol, the method comprising:

Receiving a plurality of sequentially arranged data packets after being marked and processed;

Determining, by the first identifier in the plurality of sequentially arranged data packets, a total data length included in the plurality of sequentially arranged data packets as first length information;

Determining, by the second identifier of the plurality of sequentially arranged data packets, whether each data packet in the plurality of sequentially arranged data packets is the last data packet;

When it is determined as the last data packet, the plurality of sequentially arranged data packets are combined into data;

Comparing the combined data length and the first length information, determining whether the combined data is complete according to the comparison result.
The data receiving method according to claim 3, wherein the combining the plurality of sequentially arranged data packets into data comprises:

And removing the first identifier and the second identifier in the plurality of sequentially arranged data packets, and combining the removed data packets into data.
The data receiving method according to claim 3 or 4, wherein the comparing the combined data length and the first length information, and determining whether the combined data is complete according to the comparison result comprises:

Calculating the length of the combined data as the second length information;

Comparing the first length information and the second length information, if the first length information and the second length information are consistent, determining that the received data is complete;

If the first length information does not coincide with the second length information, it is determined that the received data is incomplete.
A data transmitting apparatus, wherein the data transmitting apparatus performs data transmission by using a BLE Bluetooth low energy protocol, including:

An obtaining module, configured to acquire data and determine length information of the data;

a splitting module, configured to split the data into a plurality of sequentially arranged data packets, wherein the plurality of sequentially arranged data packets are equal in size;

a first adding module, where a first identifier is added to the first data packet of the plurality of sequentially arranged data packets, where the first identifier is used to indicate length information of the data;

a second adding module, configured to add a second identifier to each data packet of the plurality of sequentially arranged data packets, where the second identifier is used to indicate whether the data packet is in the plurality of sequentially arranged The last packet in the packet;

And a sending module, configured to sequentially send the plurality of sequentially arranged data packets after the identifier processing, so that the receiving end receives the plurality of sequentially arranged data packets.
The data transmitting apparatus according to claim 6, wherein the first adding module is specifically configured to:

Adding a first identifier to a header of the first data packet of the plurality of sequentially arranged data packets;

The second adding module is specifically configured to:

Adding a second identifier to a header of each data packet of the plurality of sequentially arranged data packets.
A data receiving device, wherein the data receiving device performs data transmission by using a BLE Bluetooth low energy protocol, including:

a receiving module, configured to receive the plurality of sequentially arranged data packets after being identified by the identifier;

a determining module, configured to determine, by using the first identifier in the plurality of sequentially arranged data packets, a total length of data included in the plurality of sequentially arranged data packets as first length information;

a determining module, configured to sequentially determine, by the second identifier in the plurality of sequentially arranged data packets, whether each data packet in the plurality of sequentially arranged data packets is the last data packet;

a combination module, configured to combine the plurality of sequentially arranged data packets into data when determining the last data packet;

The comparison module is configured to compare the combined data length and the first length information, and determine whether the combined data is complete according to the comparison result.
The data receiving device according to claim 8, wherein the combination module is specifically configured to:

And removing the first identifier and the second identifier in the plurality of sequentially arranged data packets, and combining the removed data packets into data.
The data receiving device according to claim 8 or 9, wherein the comparison module is specifically configured to:

Calculating the length of the combined data as the second length information;

Comparing the first length information and the second length information, if the first length information and the second length information are consistent, determining that the received data is complete;

If the first length information does not coincide with the second length information, it is determined that the received data is incomplete.