CN113938863A

CN113938863A - Data communication method, device, electronic equipment and storage medium

Info

Publication number: CN113938863A
Application number: CN202010676252.1A
Authority: CN
Inventors: 于小博; 陶震
Original assignee: Alibaba Group Holding Ltd
Current assignee: Alibaba Group Holding Ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2022-01-14

Abstract

The embodiment of the disclosure discloses a data communication method, a data communication device, an electronic device and a storage medium, wherein the method comprises the following steps: receiving a first message sent by a server, wherein the first message comprises first indication information of one or more additional pulse time slots; the additional pulse time slots are located in one or more preset time intervals in the first mode; sending a second message to the server; the second message comprises second indication information of a target pulse time slot; the target pulse time slot is one or more of the additional pulse time slots; and receiving the downlink data sent by the server under the target pulse time slot. According to the technical scheme, the extra pulse time slot can be configured for the terminal in the preset time interval so as to monitor the downlink data, and the requirement of the application with lower data communication time delay requirement on the terminal can be met.

Description

Data communication method, device, electronic equipment and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a data communication method and apparatus, an electronic device, and a storage medium.

Background

The internet of things technology is the third information technology revolution after computers and the internet, has the characteristics of real-time performance and interactivity, and is widely applied to multiple fields of city management, digital families, positioning navigation, logistics management, security systems and the like. The LoRa is an ultra-long distance transmission scheme based on a spread spectrum technology in the Internet of things, and has the characteristics of long transmission distance, low power consumption, multiple borrowing points, low cost and the like. LoRaWAN (LoRa Wide Area network) is an MAC layer protocol proposed by LoRa Alliance, and the main aim is to establish a star network with large capacity, long distance and low power consumption so as to meet the IoT application requirement.

The LoRa network device includes three operating modes:

class A: in this mode, the power usage of the LoRa network device is minimal, and the LoRa network device is only woken up when data is transmitted, and is in a sleep state for the rest of time. Based on Class A, the LoRa network equipment can be suitable for application scenarios such as monitoring, short message reporting and the like.

Class B: this mode is also referred to as beacon mode, where the LoRa network devices periodically wake up and receive downstream data. The LoRa network device in the Class B mode may have more receive timeslots, and in addition to the random receive window in the Class a mode, the LoRa network device in the Class B mode may open other receive windows at a designated time. In order for the LoRa network device to open the receive window at a specified time, the LoRa network device needs to receive a time-synchronized beacon (beacon) from the gateway, so that the server can know that the terminal is listening.

Class C: the mode is a continuous receiving mode and is suitable for terminal equipment with active power supply.

Disclosure of Invention

The disclosed embodiments provide a data communication method, a data communication device, an electronic device and a computer-readable storage medium, so as to solve the technical problem of how to meet the application of low-latency data communication requirements by configuring an extra burst slot.

In a first aspect, an embodiment of the present disclosure provides a data communication method, including:

receiving a first message sent by a server, wherein the first message comprises first indication information of one or more additional pulse time slots; the additional pulse time slots are located in one or more preset time intervals in the first mode;

sending a second message to the server; the second message comprises second indication information of a target pulse time slot; the target pulse time slot is one or more of the additional pulse time slots;

and receiving the downlink data sent by the server under the target pulse time slot.

Further, the first message is a network entry response message, and before receiving the first message sent by the server, the method further includes:

and sending a network access request message to the server.

Further, the first message is a first command request message, and the second message is a reply message corresponding to the first command request message.

Further, before receiving the first message sent by the server, the method further includes:

and sending a third message to the server, wherein the third message is used for requesting to switch to the first mode.

In a second aspect, an embodiment of the present disclosure provides a data communication method, including:

sending a first message to a terminal, wherein the first message comprises indication information of at least one extra pulse time slot; the additional pulse time slots are located in one or more preset time intervals in the first mode;

receiving a second message returned by the terminal; the second message comprises second indication information of a target pulse time slot; the target pulse time slot is one or more of the additional pulse time slots;

and sending downlink data to the terminal under the target pulse time slot.

Further, the first message is a network entry response message, and before the first message is sent to the terminal, the method further includes:

and receiving a network access request message sent by the terminal.

Further, before the sending the first message to the terminal, the method further includes:

and receiving a third message sent by the terminal, wherein the third message is used for requesting to switch to the first mode.

In a third aspect, an embodiment of the present disclosure provides a data communication method, including:

sending a fourth message to the server; the fourth message comprises first indication information of one or more additional burst slots, and the fourth message is used for negotiating additional burst slots with the server; the additional pulse time slots are located in one or more preset time intervals in the first mode;

receiving a fifth message returned by the server; the fifth message comprises second indication information of a target pulse time slot, wherein the target pulse time slot is one or more of the additional pulse time slots;

Further, the fourth message is second command request information, and the fifth message is reply information corresponding to the second command request information.

In a fourth aspect, an embodiment of the present disclosure provides a data communication method, including:

receiving a fourth message sent by the terminal; the fourth message comprises first indication information of one or more additional burst slots; the fourth message is used for negotiating an extra burst slot; the additional pulse time slots are located in one or more preset time intervals in the first mode;

returning a fifth message to the terminal; the fifth message comprises second indication information of a target pulse time slot, wherein the target pulse time slot is one or more of the additional pulse time slots;

and sending downlink data to the terminal under the target pulse time slot.

In a fifth aspect, an embodiment of the present disclosure provides a data communication apparatus, including:

a first receiving module configured to receive a first message sent by a server, the first message including first indication information of one or more additional burst slots; the additional pulse time slots are located in one or more preset time intervals in the first mode;

a first sending module configured to send a second message to the server; the second message comprises second indication information of a target pulse time slot; the target pulse time slot is one or more of the additional pulse time slots;

and the second receiving module is configured to receive the downlink data sent by the server at the target pulse time slot.

In a sixth aspect, an embodiment of the present disclosure provides a data communication apparatus, including:

a fourth sending module configured to send a first message to the terminal, the first message including indication information of at least one extra burst slot; the additional pulse time slots are located in one or more preset time intervals in the first mode;

a third receiving module configured to receive a second message returned by the terminal; the second message comprises second indication information of a target pulse time slot; the target pulse time slot is one or more of the additional pulse time slots;

and the fifth sending module is configured to send downlink data to the terminal in the target pulse timeslot.

In a seventh aspect, an embodiment of the present disclosure provides a data communication apparatus, including:

a sixth sending module configured to send a fourth message to the server; the fourth message comprises first indication information of one or more additional burst slots, and the fourth message is used for negotiating additional burst slots with the server; the additional pulse time slots are located in one or more preset time intervals in the first mode;

a sixth receiving module configured to receive a fifth message returned by the server; the fifth message comprises second indication information of a target pulse time slot, wherein the target pulse time slot is one or more of the additional pulse time slots;

and the seventh receiving module is configured to receive the downlink data sent by the server at the target burst timeslot.

In an eighth aspect, an embodiment of the present disclosure provides a data communication apparatus, including:

an eighth receiving module, configured to receive a fourth message sent by the terminal; the fourth message comprises first indication information of one or more additional burst slots; the fourth message is used for negotiating an extra burst slot; the additional pulse time slots are located in one or more preset time intervals in the first mode;

a return module configured to return a fifth message to the terminal; the fifth message comprises second indication information of a target pulse time slot, wherein the target pulse time slot is one or more of the additional pulse time slots;

and the seventh sending module is configured to send downlink data to the terminal in the target pulse timeslot.

The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.

In one possible design, the apparatus includes a memory configured to store one or more computer instructions that enable the apparatus to perform the corresponding method, and a processor configured to execute the computer instructions stored in the memory. The apparatus may also include a communication interface for the apparatus to communicate with other devices or a communication network.

In a ninth aspect, an embodiment of the present disclosure provides an electronic device, including a memory and a processor; wherein the memory is configured to store one or more computer instructions, wherein the one or more computer instructions are executed by the processor to implement the method of any of the above aspects.

In a tenth aspect, the present disclosure provides a computer-readable storage medium for storing computer instructions for use by any one of the above apparatuses, which includes computer instructions for performing the method according to any one of the above aspects.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

in the embodiment of the present disclosure, after the terminal sends the first request message to the server, the server carries the configuration information of the additional burst timeslot set in the first response message of the first request message, so that after reaching an agreement with the terminal, the terminal can monitor the downlink data frame sent to the terminal by the server at the target burst timeslot in the additional burst timeslot set. By the method, the extra pulse time slot can be configured for the terminal in the preset time interval so as to monitor the downlink data, and the requirement of the application with lower data communication time delay requirement on the terminal can be met.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

Other features, objects, and advantages of the present disclosure will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:

fig. 1 shows a flow chart of a data communication method according to an embodiment of the present disclosure;

fig. 2 shows a flow chart of a data communication method according to another embodiment of the present disclosure;

fig. 3 shows a flow chart of a data communication method according to another embodiment of the present disclosure;

fig. 4 shows a flow chart of a data communication method according to another embodiment of the present disclosure;

fig. 5 illustrates a flow diagram for one implementation of configuring additional timeslots in an LoRa network according to an embodiment of the present disclosure;

fig. 6 shows a schematic diagram of four extra burst slots configured in the ClassB mode of terminals in a LoRa network according to the embodiment shown in fig. 5;

fig. 7 is a schematic structural diagram of an electronic device suitable for implementing a data communication method according to an embodiment of the present disclosure.

Detailed Description

Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. Also, for the sake of clarity, parts not relevant to the description of the exemplary embodiments are omitted in the drawings.

In the present disclosure, it is to be understood that terms such as "including" or "having," etc., are intended to indicate the presence of the disclosed features, numbers, steps, behaviors, components, parts, or combinations thereof, and are not intended to preclude the possibility that one or more other features, numbers, steps, behaviors, components, parts, or combinations thereof may be present or added.

It should be further noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The LoRa network comprises a terminal node, a base station node, a network server and the like. The terminal has an LoRa network connection capability and accesses the LoRa network. According to different application scenarios deployed by the LoRa network, the terminal may include different electronic devices, for example, when the LoRa network is applied in city management, the terminal may include a smart meter; when the LoRa network is applied to a digital home, the terminal may include various smart appliances and the like. In the present invention, a server may also be called a web server.

The base station, also called gateway or concentrator in the LoRa network, has a wireless connection convergence function, and includes a terminal providing an entrance for accessing the LoRa network, and forwarding data from a network server or the terminal, so as to realize data interaction between the terminal and the network server. Of course, the base station can also perform data interaction with other base stations within the signal coverage of the base station by transmitting radio frames.

The network server may include a network server or a network server cluster, and is configured to process data acquired from a base station or a terminal, and may cause that a low-latency requirement of some applications cannot be met under control of a working mode and a working state of the base station or the terminal.

In the related art, the Class B mode cannot meet some applications with low latency requirements. To this end, the embodiment of the present disclosure provides a method capable of configuring an extra burst slot for transmitting downlink data in a known communication mode (for example, Class B mode of an LoRa network terminal), so as to enable transmission of the downlink data through the configured extra burst slot in a preset time interval (for example, Beacon Guard time Beacon _ Guard and Beacon reservation time Beacon _ Reserved in the LoRa network), thereby meeting an application of low latency requirements.

The details of the embodiments of the present disclosure are described in detail below with reference to specific embodiments.

Fig. 1 shows a flow chart of a data communication method according to an embodiment of the present disclosure. As shown in fig. 1, the data communication method includes the steps of:

in step S101, receiving a first message sent by the server, where the first message includes first indication information of one or more extra burst slots; the additional pulse time slots are located in one or more preset time intervals in the first mode;

in step S102, a second message is sent to the server; the second message comprises second indication information of a target pulse time slot; the target pulse time slot is one or more of the additional pulse time slots;

in step S103, the downlink data sent by the server is received in the target burst timeslot.

In this embodiment, the data communication method is executed on a terminal, for example, an LoRa network terminal device. The network server and the terminal may be preconfigured with configuration information of an additional burst slot set, where the additional burst slot set may include one or more additional burst slots, and the configuration information may include, but is not limited to, information about the duration, position, and the like of an additional dead slot (e.g., start time, duration, and the like of a burst slot). After the terminal accesses the LoRa network, the network server and the terminal may negotiate additional burst slots for transmitting downlink data, that is, negotiate which one or more additional burst slots in the additional burst slot set to transmit the downlink data. In some embodiments, the network server may send a first message to the terminal, and the network server may carry first indication information of one or more additional burst slots in the first message, where the first indication information is used to inform the network server of the additional burst slots that may be used to send downlink data. In some embodiments, the first indication information may be a binary bitmap (bitmap) which is composed of binary characters, and one of the characters in the binary system is used to indicate that the current burst slot is an extra burst slot in which the server can transmit downlink data, and another character is used to indicate that the current burst slot is an extra burst slot in which the server cannot transmit downlink data. For example, in the case that the extra burst slot set includes four burst slots, 1-4, the first indication information may be represented by a four-bit binary bitmap, where the extra burst slot corresponding to the character "1" is an extra burst slot in which the server may transmit downlink data, and the character "0" is an extra burst slot in which the server may not transmit downlink data.

The extra burst-slot (extra ping-slot) may be a burst slot configured outside the protocol specification of the network in which the terminal and the network server are located, and the burst slot may be an information channel for transmitting downlink data.

Taking the LoRa network as an example for illustration, the terminal operating in the Class B mode may acquire one or more pulse slots (ping-slots) in a Beacon period (Beacon _ period), and listen to the downlink data frame in the acquired one or more pulse slots.

After the terminal switches from the Class a mode to the Class B mode, the terminal may acquire the time of the network Beacon (Beacon) to synchronize the terminal internal time, and may periodically search the network Beacon to synchronize its internal time. The time interval between two Beacon starts is called Beacon period, the Beacon period is generally 128 seconds, and the transmission of Beacon starts from Beacon _ Reserved. There is a Guard time (Beacon Guard time) before each Beacon starts transmitting, preventing other time slots from colliding. The length of the beacon guard time is at least the time of the longest frame transmission in the pulse slot, therefore, the time available for the pulse slot (ping-slot) is the beacon guard time from the end of the beacon reservation time to the beginning of the next beacon.

However, as can be seen from the above description, in Class B mode, the terminal has no available burst slot in the beacon reservation time and the beacon guard time, and the inventors of the embodiments of the present disclosure have found that some applications with low latency requirements can be satisfied by configuring additional burst slots in the beacon reservation time and the beacon guard time.

In this embodiment, the set of additional burst slots may include one or more additional burst slots. In some embodiments, the first indication information may include an identifier of all or a part of the additional burst timeslot in the additional burst timeslot set, where information such as a start position, a duration, and the like of each additional burst timeslot in the additional burst timeslot set has been configured in advance between the network server and the terminal; that is, in this embodiment, the first indication information is used to indicate that the network server can support part or all of the additional burst slots in the preconfigured set of additional burst slots. Still taking the LoRa network as an example for illustration, according to the protocol specification of the LoRa network, the beacon protection time is approximately 3 seconds, and the beacon reservation time is 2.12 seconds, so that 3 extra burst slots can be configured in the beacon protection time and 1 extra burst slot can be configured in the beacon reservation time, and 4 extra burst slots are total, so that the extra burst slot set can include 4 extra burst slots, the start time and duration of the 4 extra burst slots in the extra burst slot set are configured in advance on the network server and the terminal, and the first indication information carried in the first message can include the identifier of one or more extra burst slots in the 4 extra burst slots supported by the network server.

In this embodiment, the preset time interval may be one or more time intervals in the known first mode in a network protocol specification followed by the terminal and the network server, and according to a standard network protocol specification, the one or more preset time intervals do not provide a burst slot for transmitting downlink data. The first mode is an operation mode of the terminal, and the operation mode may have one or more reserved time intervals between the terminal and the network server, for example, the first mode may be a Class B mode in a LoRa network, and the two time intervals of the beacon protection time and the beacon reservation time in the Class B mode are the reserved time intervals in the Class B mode.

The second message may be a standard message defined in a network protocol specification followed by the terminal and the network server, and is sent by the terminal to the network server to inform the network server of information of the burst slots available to the terminal itself, such as period, rate, etc. In the embodiment of the present disclosure, after receiving the first indication information of the additional burst timeslot included in the first message sent by the network server, the terminal may send, by using the second message, the second indication information of the target burst timeslot to the network server, for example, the second indication information may include an identifier of the target burst timeslot in the additional burst timeslot set. In some embodiments, the second indication information may be a binary bitmap which is composed of binary characters, and one of the characters in the binary is used to indicate that the current pulse time slot is the target pulse time slot, and another character is used to indicate that the current pulse time slot is the non-target pulse time slot. For example, in the case where the extra set of pulse slots includes four pulse slots, 1-4, the second indication information may be represented by a four-bit binary bitmap, where the pulse slot corresponding to the character "1" is the target pulse slot and the character "0" is not the target pulse slot. For example, if the binary bitmap is "0100", it indicates that the second extra burst slot is available and several other extra burst slots are not available.

After the terminal is switched to the first mode, the terminal can determine an extra pulse time slot which can be supported by the terminal according to first indication information carried in the first message by the network server, and send second indication information to the server after determining a target pulse time slot according to the extra pulse time slot which can be supported by the terminal; and then the terminal can monitor the downlink data sent by the network server on the target pulse time slot. The target burst slot may be all or part of the additional burst slots in the set of additional burst slots, depending on the protocol that the terminal and the network server have agreed upon. Of course, it can be understood that the terminal only supports receiving downlink data on a part of the extra burst slots in the extra burst slot set, i.e. the target burst slot.

It should be noted that, in the present disclosure, the communication between the terminal and the network server passes through the gateway without being particularly pointed out.

In the embodiment of the disclosure, after receiving a first message sent by a network server, a terminal determines a target pulse time slot according to first indication information in the first message, and sends a second message to the network server to confirm that the terminal monitors the target pulse time slot of downlink data. By the method, the extra pulse time slot can be configured for the terminal in the preset time interval so as to monitor the downlink data, and the requirement of the application with lower data communication time delay requirement on the terminal can be met.

In an optional implementation manner of this embodiment, the first message may be an access response message, and step S101, that is, before the step of receiving the first message sent by the server, the method further includes the following steps:

and sending a network access request message to the server.

In this optional implementation manner, when the terminal joins the network where the network server is located, the terminal may send a network access request message to the network server, and the first message may be a response message of the network server to the network access request message. The network-entry request message specified in the network protocol specification of the LoRa network is Join _ request, and the response message of the network server to the Join _ request is the network-entry accept message Join _ accept. After the LoRa network server receives the terminal network access request, if the current terminal is allowed to Join the LoRa network, the network server will return Join-accept to the terminal. If the terminal is not allowed to be joined to the LoRa network, the network server does not send any message. The Join-accept message is transmitted as a normal downlink message. The network server may carry the first indication information in Join _ accept, and the terminal may return the second indication information using a burst slot information request message (pintslotinforeq). I.e. the second message may be a burst slot information request message.

In an optional implementation manner of this embodiment, the first message is first command request information, and the second message is reply information corresponding to the first command request information.

In this optional implementation, the first message may be a first command request message preconfigured for negotiating an extra burst slot, where the first command request message may be a MAC instruction, and the second message may be a reply message corresponding to the first command request message. Taking the LoRa network as an example, the first command request message may be a burst slot information request message (pintslotinfo req), and the second message may be a burst slot information response message (pintslotinfo); in addition, the first command request message may also be an independent extra burst slot configuration request message ExtraPingSlotConfReq, and the second message may be its reply message ExtraPingSlotConfAns; the ExtraPingSlotConfReq and ExtraPingSlotConfAns may also be MAC instructions. The terminal and the server may negotiate the extra burst slot using the first message and the second message in a first mode, which may be a Class B mode in the LoRa network, or a second mode, which may be a Class a mode in the LoRa network.

In an optional implementation manner of this embodiment, in step S101, before the step of receiving the first message sent by the server, the method further includes the following steps:

In this alternative implementation, the first mode may be a fixed communication mode between the terminal and the network server, and the communication mode between the terminal and the network server may include, but is not limited to, a first mode and a second mode, taking a LoRa network as an example, the first mode may be a Class B mode, and the second mode may be a Class a mode or a Class C mode. When the terminal is switched to the first mode from other modes except the first mode, such as the second mode, the terminal sends a request message for switching to the first mode to the network server, and after receiving the request message for switching to the first mode by the terminal, the network server can know that the terminal is successfully switched to the first mode, and at the moment, the network server can actively send a first message for negotiating an additional pulse time slot. After receiving the request message for switching to the first mode sent by the terminal, the network server may return reply information, that is, a second message, for the request message to the terminal, and after receiving the second message, the terminal may receive downlink data at the target pulse timeslot according to second indication information in the second message.

In some embodiments, the first message is a request message sent by the terminal to the network server in the first mode for negotiating the additional burst slot, and in the case that the network server and the terminal do not pre-configure the additional burst slot, the first message may include first indication information of the additional burst slot supported by the network server side. The terminal may determine a target burst slot capable of receiving downlink data according to the first indication information. It can be understood that the additional burst timeslot indicated in the first indication information is all or a part of the timeslot in the additional burst timeslot set, and the target burst timeslot is all or a part of the additional burst timeslot indicated in the first indication information, that is, the final target burst timeslot is an additional burst timeslot supported by both the network server and the terminal.

Still taking the LoRa network as an example, the two time intervals of the beacon protection time and the beacon reservation time in the Class B mode may support 4 extra burst slots in total, and the first message sent by the network server to the terminal may indicate a part or all of the 4 extra burst slots supported by the network server side, that is, indicate a part or all of the 1-4 extra burst slots as candidate burst slots; and after the terminal receives the first message, the terminal may determine a target pulse timeslot according to the first indication information in the first message from the network server according to the situation that the terminal can support, where the target pulse timeslot may be all or part of the pulse timeslots indicated in the first indication information. In some embodiments, the first indication information may be a binary bitmap (bitmap) which is composed of binary characters, and one of the characters in the binary system is used to indicate that the current pulse time slot is the target pulse time slot, and the other character is used to indicate that the current pulse time slot is the non-target pulse time slot. For example, in the case where the extra set of burst slots includes four burst slots, 1-4, the second indication information can be represented by a four-bit binary bitmap, where the burst slot corresponding to the character "1" is the target burst slot and the character "0" is not the target burst slot. In this way, the network server and the terminal can reach an agreement to transmit and receive downlink data through the negotiated target burst slot in the first mode.

Fig. 2 shows a flow chart of a data communication method according to an embodiment of the present disclosure. As shown in fig. 2, the data communication method includes the steps of:

in step S201, a first message is sent to a terminal, where the first message includes indication information of at least one extra burst slot; the additional pulse time slots are located in one or more preset time intervals in the first mode;

in step S202, receiving a second message returned by the terminal; the second message comprises second indication information of a target pulse time slot; the target pulse time slot is one or more of the additional pulse time slots;

in step S203, downlink data is sent to the terminal in the target burst slot.

In this embodiment, the data communication method is executed on a web server, for example, an LoRa web server. The network server and the terminal may be preconfigured with configuration information of an additional burst slot set, where the additional burst slot set may include one or more additional burst slots, and the configuration information may include, but is not limited to, information about the duration, position, and the like of an additional dead slot (e.g., start time, duration, and the like of a burst slot). After the terminal accesses the LoRa network, the network server and the terminal may negotiate additional burst slots for transmitting downlink data, that is, negotiate which one or more additional burst slots in the additional burst slot set to transmit the downlink data. In some embodiments, the network server may send a first message to the terminal, and the network server may carry first indication information of one or more additional burst slots in the first message, where the first indication information is used to inform the network server of the additional burst slots that may be used to send downlink data. In some embodiments, the first indication information may be a binary bitmap (bitmap) which is composed of binary characters, and one of the characters in the binary system is used to indicate that the current burst slot is an extra burst slot in which the network server can transmit downlink data, and another character is used to indicate that the current burst slot is an extra burst slot in which the network server cannot transmit downlink data. For example, in the case that the extra burst slot set includes four burst slots, 1-4, the first indication information may be represented by a four-bit binary bitmap, where the extra burst slot corresponding to the character "1" is an extra burst slot in which the server may transmit downlink data, and the character "0" is an extra burst slot in which the server may not transmit downlink data.

After the terminal is switched to the first mode, the terminal can determine an extra pulse time slot which can be supported by the terminal according to first indication information carried in the first message by the network server, and after the extra pulse time slot which can be supported by the terminal is determined as a target pulse time slot, second indication information is sent to the server; and then the terminal can monitor the downlink data sent by the network server on the target pulse time slot. The target burst slot may be all or part of the additional burst slots in the set of additional burst slots, depending on the protocol that the terminal and the network server have agreed upon. Of course, it can be understood that the terminal only supports listening to the downlink data on a part of the extra burst slots in the extra burst slot set, i.e. the target burst slot.

In an optional implementation manner of this embodiment, the first message is a network access response message, and before the step S201, that is, the step of sending the first message to the terminal, the method may further include the following steps:

and receiving a network access request message sent by the terminal.

In this optional implementation manner, when the terminal joins the network where the network server is located, the terminal may send a network access request message to the server, and the first message may include a response message of the network server to the network access request message. The network access request message specified in the network protocol specification of the LoRa network is Join _ request, and the response message of the network server to the Join _ request is Join _ accept. After the LoRa network server receives the terminal network access request, if the current terminal is allowed to Join the LoRa network, the network server will return Join-accept to the terminal. If the terminal is not allowed to be joined to the LoRa network, the network server does not send any message. The Join-accept message is transmitted as a normal downlink message. The network server may carry the first indication information in Join _ accept, and the terminal may return the second indication information using a burst slot information request message (pintslotinforeq). I.e. the second message may be a burst slot information request message.

In this optional implementation, the first message may be a first command request message preconfigured for negotiating an extra burst slot, where the first command request message may be a MAC instruction, and the second message may be a reply message corresponding to the first command request message. Taking the LoRa network as an example, the first command request information may be pingslotinfo req, and the second message may be pingslotinfo ans; in addition, the first command request message may also be an independent extra burst slot configuration request message ExtraPingSlotConfReq, and the second message may be its reply message ExtraPingSlotConfAns; the ExtraPingSlotConfReq and ExtraPingSlotConfAns may also be MAC instructions. The terminal and the server may negotiate the extra burst slot using the first message and the second message in a first mode, which may be a Class B mode in the LoRa network, or a second mode, which may be a Class a mode in the LoRa network.

In an optional implementation manner of this embodiment, in step S201, before the step of sending the first message to the terminal, the method may further include the following step:

In this alternative implementation, the first mode may be a fixed communication mode between the terminal and the network server, and the communication mode between the terminal and the network server may include, but is not limited to, a first mode and a second mode, taking a LoRa network as an example, the first mode may be a Class B mode, and the second mode may be a Class a mode or a Class C mode. When the terminal is switched to the first mode from other modes except the first mode, such as the first mode, a request message for switching to the first mode is sent to the network server, and after the network server receives a second message for switching the terminal to the first mode, the network server can know that the terminal is successfully switched to the first mode, and at the moment, the network server can actively send a first message for negotiating an additional pulse time slot. After receiving the request message for switching to the first mode sent by the terminal, the network server may return reply information, that is, a second message, for the request message to the terminal, and after receiving the second message, the terminal may receive downlink data at the target pulse timeslot according to second indication information in the second message.

Still taking the LoRa network as an example, the two time intervals of the beacon protection time and the beacon reservation time in the Class B mode may support 4 extra burst slots in total, and the first message sent by the network server to the terminal may indicate a part or all of the 4 extra burst slots supported by the network server side, that is, indicate a part or all of the 1-4 extra burst slots as candidate burst slots; and after the terminal receives the first message, the terminal may determine a target pulse timeslot according to the first indication information in the first message from the network server according to the situation that the terminal can support, where the target pulse timeslot may be all or part of the pulse timeslots indicated in the first indication information. In some embodiments, the first indication information may be a binary bitmap which is composed of binary characters, and one of the characters in the binary is used to indicate that the current pulse slot is the target pulse slot, and the other character is used to indicate that the current pulse slot is the non-target pulse slot. For example, in the case where the extra set of burst slots includes four burst slots, 1-4, the second indication information can be represented by a four-bit binary bitmap, where the burst slot corresponding to the character "1" is the target burst slot and the character "0" is not the target burst slot. In this way, the network server and the terminal can reach an agreement to transmit and receive downlink data through the negotiated target burst slot in the first mode.

Fig. 3 shows a flow chart of a data communication method according to another embodiment of the present disclosure. As shown in fig. 3, the data communication method includes the steps of:

in step S301, a fourth message is sent to the server; the fourth message comprises first indication information of one or more additional burst slots, and the fourth message is used for negotiating additional burst slots with the server; the additional pulse time slots are located in one or more preset time intervals in the first mode;

in step S302, receiving a fifth message returned by the server; the fifth message comprises second indication information of a target pulse time slot, wherein the target pulse time slot is one or more of the additional pulse time slots;

in step S303, the downlink data sent by the server is received in the target burst timeslot.

In this embodiment, the data communication method is executed on a terminal. The network server and the terminal may be preconfigured with configuration information of an additional burst slot set, where the additional burst slot set may include one or more additional burst slots, and the configuration information may include, but is not limited to, information such as a duration, a position, and the like of the additional burst slot (e.g., a start time, a duration, and the like of the burst slot). After successfully switching to the first mode, the terminal may actively send a fourth message for negotiating additional burst slots to the network server, where the fourth message may include first indication information of one or more additional burst slots. Of course, it is understood that the terminal may also actively send a fourth message for negotiating additional burst slots in the first mode to the network server in the second mode. Taking the LoRa network as an example, the first mode may be a Class B mode, and the second mode may be a Class a mode. The first indication information is used for informing the network server of an extra burst slot which can be used for sending downlink data. In some embodiments, the first indication information may be a binary bitmap (bitmap) which is composed of binary characters, and one of the characters in the binary system is used to indicate that the current burst slot is an extra burst slot in which the server can transmit downlink data, and another character is used to indicate that the current burst slot is an extra burst slot in which the server cannot transmit downlink data. For example, in the case that the extra burst slot set includes four burst slots, 1-4, the first indication information may be represented by a four-bit binary bitmap, where the extra burst slot corresponding to the character "1" is an extra burst slot in which the server may transmit downlink data, and the character "0" is an extra burst slot in which the server may not transmit downlink data. The extra burst slot may be a burst slot configured outside the protocol specification of the network in which the terminal and the network server are located, and the burst slot may be an information channel for transmitting downlink data.

The network server may return a fifth message to the terminal after receiving the fourth message, the fifth message including second indication information for confirming the target burst slot. The terminal may receive the downlink data at the target burst slot agreed with the network server according to the second indication information after receiving the fifth message.

The extra burst slot may be a burst slot configured outside the protocol specification of the network in which the terminal and the network server are located, and the burst slot may be an information channel for transmitting downlink data. Taking the LoRa network as an example, a terminal operating in the Class B mode may acquire one or more pulse slots (ping-slots) in a Beacon period (Beacon _ period), and receive a downlink data frame in the acquired one or more pulse slots.

In this embodiment, the preset time interval may be one or more time intervals in the known first mode in a network protocol specification followed by the terminal and the network server, and according to a standard network protocol specification, the one or more preset time intervals do not provide a burst slot for transmitting downlink data. The first mode is an operation mode of the terminal, and the operation mode may have one or more reserved time intervals between the terminal and the network server, for example, a Class B mode in a LoRa network, and the two time intervals, i.e., the beacon protection time and the beacon reservation time, in the Class B mode are reserved time intervals in the Class B mode.

After the terminal is switched to the first mode, the terminal may actively request the network server to negotiate a target pulse timeslot for receiving downlink data, and receive data sent by the network server on the target pulse timeslot according to second indication information in a fifth message after receiving a response message of the network server, that is, the fifth message. Of course, in other embodiments, the terminal may also actively request the network server to negotiate a target burst slot for receiving downlink data in the first mode in the second mode. Taking the LoRa network as an example, the first mode may be a Class B mode, and the second mode may be a Class a mode. The target burst slot may be all or a portion of the additional burst slots in the set of additional burst slots, depending on the protocol being agreed upon between the terminal and the network server. Of course, it can be understood that if the terminal only needs to receive downlink data on a part of the extra burst slots, the terminal may carry the indication information of the extra burst slot information supported by the terminal in the first indication information in the fourth message, and the network server may also carry the second indication information of the target burst slot that can eventually reach an agreement with the terminal in the fifth message according to the situation supported by the network server. The second indication may include an identification of the target pulse slot in the set of additional pulse slots.

In some embodiments, the second indication information may be a binary bitmap (bitmap) which is composed of binary characters, and one of the characters in the binary system is used to indicate that the current pulse time slot is the target pulse time slot, and the other character is used to indicate that the current pulse time slot is the non-target pulse time slot. For example, in the case where the extra set of pulse slots includes four pulse slots, 1-4, the second indication information may be represented by a four-bit binary bitmap, where the pulse slot corresponding to the character "1" is the target pulse slot and the character "0" is not the target pulse slot. For example, if the binary bitmap is "0100", it indicates that the second extra burst slot is available and several other extra burst slots are not available.

In an optional implementation manner of this embodiment, the fourth message is second command request information, and the fifth message is reply information corresponding to the second command request information.

In this alternative implementation, the fourth message may be second command request information preconfigured for negotiating an extra burst slot, where the second command request information may be a MAC instruction, and the fifth message may be reply information corresponding to the second command request information. Taking the LoRa network as an example, the second command request message, that is, the fourth message may be a burst slot information request message (pintslotinquire), and the fifth message may be a burst slot information response message (pintslotinfo); the second command request message, that is, the fourth message may also be an independent extra burst slot configuration request message ExtraPingSlotConfReq, and the fifth message may be its reply message extrapingslotconfnas; the ExtraPingSlotConfReq and ExtraPingSlotConfAns may also be MAC instructions.

Fig. 4 shows a flow chart of a data communication method according to another embodiment of the present disclosure. As shown in fig. 4, the data communication method includes the steps of:

in step S401, a fourth message sent by the terminal is received; the fourth message comprises first indication information of one or more additional burst slots; the fourth message is used for negotiating an extra burst slot; the additional pulse time slots are located in one or more preset time intervals in the first mode;

in step S402, a fifth message is returned to the terminal; the fifth message comprises second indication information of a target pulse time slot, wherein the target pulse time slot is one or more of the additional pulse time slots;

in step S403, downlink data is sent to the terminal in the target burst slot.

In this embodiment, the data communication method is executed on a network server. The network server and the terminal may be preconfigured with configuration information of an additional burst slot set, where the additional burst slot set may include one or more additional burst slots, and the configuration information may include, but is not limited to, information about the duration, position, and the like of an additional dead slot (e.g., start time, duration, and the like of a burst slot). After successfully switching to the first mode, the terminal may actively send a fourth message for negotiating additional burst slots to the network server, where the fourth message may include first indication information of one or more additional burst slots. Of course, it is understood that the terminal may also actively send a fourth message for negotiating additional burst slots in the first mode to the network server in the second mode. Taking the LoRa network as an example, the first mode may be a Class B mode, and the second mode may be a Class a mode. The first indication information is used for informing the network server of an extra burst slot which can be used for sending downlink data. In some embodiments, the first indication information may be a binary bitmap (bitmap) which is composed of binary characters, and one of the characters in the binary system is used to indicate that the current burst slot is an extra burst slot in which the server can transmit downlink data, and another character is used to indicate that the current burst slot is an extra burst slot in which the server cannot transmit downlink data. For example, in the case that the extra burst slot set includes four burst slots, 1-4, the first indication information may be represented by a four-bit binary bitmap, where the extra burst slot corresponding to the character "1" is an extra burst slot in which the server may transmit downlink data, and the character "0" is an extra burst slot in which the server may not transmit downlink data. The extra burst slot may be a burst slot configured outside the protocol specification of the network in which the terminal and the network server are located, and the burst slot may be an information channel for transmitting downlink data.

The first mode may be a fixed communication mode between the terminal and the network server, and the communication mode between the terminal and the network server may include, but is not limited to, a first mode and a second mode, and taking a LoRa network as an example, the first mode may be a Class B mode, and the second mode may be a Class a mode or a Class C mode.

The extra burst slot may be a burst slot configured outside the protocol specification of the network in which the terminal and the network server are located, and the burst slot may be an information channel for transmitting downlink data. Taking the LoRa network as an example for illustration, the terminal operating in the Class B mode may acquire one or more pulse slots (ping-slots) in a Beacon period (Beacon _ period), and listen to the downlink data frame in the acquired one or more pulse slots.

Fig. 5 shows a flow diagram of one implementation of configuring additional timeslots in an LoRa network according to an embodiment of the present disclosure. As shown in fig. 5, the extra slots may be configured in three ways:

first, the network server may notify the terminal of first indication information of an extra burst slot in the ClassB mode through a join-accept message, and the terminal may select to listen to the extra burst slot in the ClassB mode.

And secondly, the network server informs the terminal of the first indication information of the extra pulse time slot in Class B through the MAC instruction, and the terminal can select to monitor the extra pulse time slot in the Class B mode.

And after the terminal is switched to the ClassB mode, actively requesting a network server to configure an additional pulse time slot in the ClassB mode through an MAC instruction, sending first indication information of the additional pulse time slot to the network server through the MAC instruction by the terminal, and after an MAC response instruction of the network server is obtained, the terminal can select to monitor the additional pulse time slot in the ClassB mode.

The three configurations are described below with reference to fig. 5:

1. the information of the extra pulse time slot is pre-configured between the terminal and a Network Server (NS), and the information comprises the information of the time length and the position of the extra pulse time slot.

The first configuration:

and 2-3, the terminal sends a join request message to the NS through the gateway.

4-5, the network server returns a join access response message to the terminal through the gateway, where the message includes extra pulse-slot indication information (extra pulse-slot indicator), the indication information is mainly used to indicate the terminal to monitor downlink data through a preconfigured extra pulse slot, optionally, the join access message may also include indication information (bitmap) whether 4 extra pulse slots are respectively opened, and the terminal may monitor on the opened extra pulse slot through the indication information (bitmap); as shown in fig. 6, the numbers of the 4 extra burst slots are 0, 1, 2, and 3, respectively, then the bitmap may indicate whether each extra burst slot is available, and optionally, whether the extra burst slot is available may also be indicated by an extra burst-slot indicator.

6-7, the terminal sends a request message (PingslotInfoReq or ExtraPingslotConfReq) to the NS through the gateway, wherein the request message carries extra burst-slot indication information (extra burst-slot indicator) besides the reception cycle information of the class B mode, and the indication information is mainly used for indicating the terminal to select which extra burst slot or extra burst slots to monitor in the 4 extra burst slots.

8. And the terminal monitors and receives the ClassB downlink data frame on the selected extra burst time slot.

The second configuration:

9-10, after receiving a request for switching the terminal to the ClassB mode, the NS sends an extra pulse slot configuration request message (extra ping-slot controller req) to the terminal through the gateway, where the extra pulse slot configuration request message may include extra pulse slot indication information (extra ping-slot indicator), the indication information is mainly used to indicate the terminal to monitor downlink data through the preconfigured extra pulse slot, and optionally, the extra ping-slot indicator may also include indication information (bitmap) whether 4 extra pulse slots are respectively turned on, and the terminal may monitor on the turned-on extra pulse slot through the indication information (bitmap). As shown in fig. 6, the numbers of the 4 extra burst slots are 0, 1, 2, and 3, respectively, then the bitmap may indicate whether each extra burst slot is available, and optionally, whether the extra burst slot is available may also be indicated by an extra burst-slot indicator.

11-12, the terminal sends an extra burst slot configuration acknowledgement message (extra ping slot configurations) to the NS through the gateway, where the acknowledgement message may include extra burst slot indication information (extra burst-slot indicator), where the indication information is mainly used to indicate whether the 4 extra burst slots are respectively turned on, and the terminal may listen to the turned-on extra burst slots through the indication information. The ExtraPingSlotConfAns can represent that all 4 extra burst slots are available with one bit of information; optionally, the ExtraPingSlotConfAns may also be a bitmap including 4 bits, each position representing whether a corresponding extra ping-slot is available, for example 0111 representing that No. 1, No. 2, No. 3 extra burst slots are available.

13. And the terminal monitors and receives the ClassB downlink data frame on the appointed extra burst time slot.

The third configuration mode:

14-15, after the terminal is successfully switched to the ClassB mode, sending an extra pulse slot configuration request message (extra ping slot configreq) to the NS through the gateway, where the extra pulse slot configuration request message may include extra pulse slot indication information (extra ping-slot indicator), where the indication information is mainly used to indicate the terminal to monitor downlink data through the preconfigured extra pulse slots, and optionally, the extra ping-slot indicator may also include indication information (bitmap) that the terminal selects which extra pulse slots of the 4 extra pulse slots to monitor respectively, and the terminal may monitor on the selected extra pulse slots through the indication information (bitmap). As shown in fig. 6, the numbers of the 4 extra burst slots are 0, 1, 2, and 3, respectively, then the bitmap may indicate whether each extra burst slot is available, and optionally, whether the extra burst slot is available may also be indicated by an extra burst-slot indicator.

16-17, the NS sends an extra burst slot configuration acknowledgement message (extra ping slot configurations) to the terminal through the gateway, where the acknowledgement message may include extra burst slot indication information (extra burst-slot indicator), and the indication information is mainly used to indicate whether the 4 extra burst slots are respectively turned on, and the terminal may listen to the turned-on extra burst slots through the indication information. The ExtraPingSlotConfAns can represent that all 4 extra burst slots are available with one bit of information; optionally, the ExtraPingSlotConfAns may also be a bitmap including 4 bits, each position representing whether the corresponding extraping-slot is available, for example, 0111 represents that the extra pulse slots No. 1, 2, and 3 are available, and the extra pulse slot No. 0 is not available.

18. And the terminal monitors and receives the ClassB downlink data frame on the appointed extra burst time slot.

In this embodiment, the terminal may synchronize the first indication information of the additional burst timeslot in the ClassB mode with the network server through the network access message or the MAC instruction, so that the terminal may effectively monitor and receive the ClassB downlink data frame on the additional burst timeslot, thereby improving the network transmission efficiency.

It is understood that the configuration of the three extra pulse slots shown in fig. 5 is merely an example, and the embodiments of the present disclosure are not limited thereto.

Fig. 6 shows a schematic diagram of four extra burst slots configured in the ClassB mode of terminals in a LoRa network according to the embodiment shown in fig. 5. As shown in fig. 6, the first three of the 4 extra burst slots are located in the beacon guard time interval in Class B mode, and the other is located in the beacon reservation time interval, and their start time is the end time of the beacon frame plus a time offset. Through the embodiment of the disclosure, the terminal can monitor and receive downlink data by using 4 configured extra pulse time slots except for monitoring and receiving the downlink data by using the existing pulse time slot in the beacon window, and the extra pulse time slots can be used for application of low-delay requirements, so that the data transmission efficiency can be further improved.

The following are embodiments of the disclosed apparatus that may be used to perform embodiments of the disclosed methods.

According to the data communication device of an embodiment of the present disclosure, the device may be implemented as part or all of an electronic device by software, hardware, or a combination of both. The data communication apparatus includes:

In an optional implementation manner of this embodiment, the first message is an access response message, and before the first receiving module, the apparatus further includes:

a second sending module configured to send a network access request message to the server.

In an optional implementation manner of this embodiment, before the first receiving module, the method further includes:

a third sending module configured to send a third message to the server, the third message requesting to switch to the first mode.

The data communication apparatus in this embodiment corresponds to the data communication method in the embodiment and the related embodiment shown in fig. 1, and specific details can be referred to the above description of the data communication method in the embodiment and the related embodiment shown in fig. 1, and are not described herein again.

According to another embodiment of the present disclosure, the data communication apparatus may be implemented as part or all of an electronic device by software, hardware, or a combination of both. The data communication apparatus includes:

In an optional implementation manner of this embodiment, the first message is an access response message, and before the fourth sending module, the apparatus further includes:

and the fourth receiving module is configured to receive the network access request message sent by the terminal.

In an optional implementation manner of this embodiment, before the fourth sending module, the method further includes:

a fifth receiving module, configured to receive a third message sent by the terminal, where the third message is used to request to switch to the first mode.

The data communication apparatus in this embodiment corresponds to the data communication method in the embodiment and the related embodiment shown in fig. 2, and specific details can be referred to the above description of the data communication method in the embodiment and the related embodiment shown in fig. 2, which is not described herein again.

The data communication apparatus in this embodiment corresponds to the data communication method in the embodiment and the related embodiment shown in fig. 3, and specific details can be referred to the above description of the data communication method in the embodiment and the related embodiment shown in fig. 3, and are not described herein again.

The data communication apparatus in this embodiment corresponds to the data communication method in the embodiment and the related embodiment shown in fig. 4, and specific details can be referred to the above description of the data communication method in the embodiment and the related embodiment shown in fig. 4, which is not described herein again.

As shown in fig. 7, electronic device 700 includes a processing unit 701, which may be implemented as a CPU, GPU, FPGA, NPU, or other processing unit. The processing unit 701 may execute various processes in the embodiment of any one of the methods described above of the present disclosure according to a program stored in a Read Only Memory (ROM)702 or a program loaded from a storage section 708 into a Random Access Memory (RAM) 703. In the RAM703, various programs and data necessary for the operation of the electronic apparatus 700 are also stored. The processing unit 701, the ROM702, and the RAM703 are connected to each other by a bus 704. An input/output (I/O) interface 705 is also connected to bus 704.

The following components are connected to the I/O interface 705: an input portion 706 including a keyboard, a mouse, and the like; an output section 707 including a display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker; a storage section 708 including a hard disk and the like; and a communication section 709 including a network interface card such as a LAN card, a modem, or the like. The communication section 709 performs communication processing via a network such as the internet. A drive 710 is also connected to the I/O interface 705 as needed. A removable medium 711 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 710 as necessary, so that a computer program read out therefrom is mounted into the storage section 708 as necessary.

In particular, according to embodiments of the present disclosure, any of the methods described above with reference to embodiments of the present disclosure may be implemented as a computer software program. For example, embodiments of the present disclosure include a computer program product comprising a computer program tangibly embodied on a readable medium thereof, the computer program comprising program code for performing any of the methods of the embodiments of the present disclosure. In such an embodiment, the computer program can be downloaded and installed from a network through the communication section 709, and/or installed from the removable medium 711.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowcharts or block diagrams may represent a module, a program segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

The units or modules described in the embodiments of the present disclosure may be implemented by software or hardware. The units or modules described may also be provided in a processor, and the names of the units or modules do not in some cases constitute a limitation of the units or modules themselves.

As another aspect, the present disclosure also provides a computer-readable storage medium, which may be the computer-readable storage medium included in the apparatus in the above-described embodiment; or it may be a separate computer readable storage medium not incorporated into the device. The computer readable storage medium stores one or more programs for use by one or more processors in performing the methods described in the present disclosure.

The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention in the present disclosure is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is possible without departing from the inventive concept. For example, the above features and (but not limited to) the features disclosed in this disclosure having similar functions are replaced with each other to form the technical solution.

Claims

1. A method of data communication, comprising:

2. The method of claim 1, wherein the first message is an inbound reply message, and prior to receiving the first message sent by the server, the method further comprises:

and sending a network access request message to the server.

3. The method of claim 1, wherein the first message is a first command request message, and the second message is a reply message corresponding to the first command request message.

4. The method of claim 3, wherein prior to receiving the first message sent by the server, the method further comprises:

5. A method of data communication, comprising:

and sending downlink data to the terminal under the target pulse time slot.

6. The method of claim 5, wherein the first message is an inbound reply message, and before the sending the first message to the terminal, the method further comprises:

and receiving a network access request message sent by the terminal.

7. The method of claim 5, wherein the first message is a first command request message, and the second message is a reply message corresponding to the first command request message.

8. The method of claim 5, wherein prior to the sending the first message to the terminal, the method further comprises:

9. A method of data communication, comprising:

10. The method of claim 9, wherein the fourth message is a second command request message, and the fifth message is a reply message corresponding to the second command request message.

11. A method of data communication, comprising:

and sending downlink data to the terminal under the target pulse time slot.

12. The method of claim 11, wherein the fourth message is a second command request message, and the fifth message is a reply message corresponding to the second command request message.

13. A timeslot configuring apparatus, comprising:

14. A data communication apparatus, comprising:

15. A data communication apparatus, comprising:

16. A data communication apparatus, comprising:

17. An electronic device, comprising a memory and a processor; wherein the content of the first and second substances,

the memory is to store one or more computer instructions, wherein the one or more computer instructions are to be executed by the processor to implement the method of any one of claims 1-12.

18. A computer readable storage medium having computer instructions stored thereon, wherein the computer instructions, when executed by a processor, implement the method of any of claims 1-12.