CN118741699A - A wireless control transmission method based on gateway time slot scheduling - Google Patents

Abstract

The invention discloses a wireless control transmission method based on gateway time slot scheduling, which relates to the technical field of wireless communication, in the invention, after a wireless node terminal is successful in network access, a wireless radio frequency module is dormant, and after receiving the data of the data acquisition module, waiting for a time slot number m corresponding to the terminal serial number n to wake up the wireless module for data transmission according to the alignment time T. The invention controls the opening and closing of the wireless receiving and transmitting function of the terminal through the reply information of the gateway wireless access point, thereby further reducing the use power consumption of the wireless mobile equipment and prolonging the effective use time; meanwhile, the reserved time slot event stream scheduling method is adopted to meet the requirements of the bidirectional wireless transmission function of the equipment, the communication function of the product is met, the downstream communication reliability of the equipment is improved, the problems of data loss and the like are avoided, and the transmission efficiency is improved.

Description

A wireless control transmission method based on gateway time slot scheduling

Technical Field

The present invention relates to the technical field of wireless communications, and in particular to a wireless control transmission method based on gateway time slot scheduling.

Background Art

Low power consumption has always been an important consideration in the design of wireless communication devices, especially in portable or remotely deployed devices that rely on battery power. The battery life of these devices directly affects the user experience and the practicality of the device. As a key component for achieving communication between devices, the power consumption of wireless radio frequency often accounts for a significant proportion of the total power consumption of the device. Therefore, reducing the power consumption of wireless radio frequency modules is crucial to extending the standby time.

Existing low-power wireless communication technologies have taken a series of measures to reduce energy consumption, such as the sleep-wake mechanism, which has reduced the energy consumption of wireless communication to a certain extent. In sleep mode, wireless communication devices will turn off most functions to save energy, and only wake up at predetermined time intervals to check whether there is data to be received. When there is a need for data transmission, the device will wake up and turn on the RF transceiver function to achieve two-way data transmission.

However, despite the sleep-wake mechanism, the device usually keeps the RF transceiver function turned on after waking up so as to be ready to receive possible incoming signals at any time. This always-on RF transceiver function will cause invalid power consumption when there is no actual signal reception, thereby shortening the standby time of the device.

Summary of the invention

In view of this, the present invention provides a bidirectional transmission method based on gateway time slot scheduling to solve the problem of ineffective power consumption when the radio frequency receiving monitoring of the mobile wireless device is idle, thereby increasing the product standby time and actual use time.

To this end, the present invention adopts the following technical solutions:

On the one hand, the present invention discloses a wireless control transmission method based on gateway time slot scheduling, which is applied to a gateway in an industrial wireless system for uploading low-power time slot packets; the gateway allocates corresponding time slot numbers to each wireless node terminal according to the order in which the wireless node terminals are powered on and connected to the network in the industrial wireless system, and adds a reserved time slot after configuring every k time slots to process downlink event data; the method comprises:

Receive downlink data/configuration information from the host computer or management platform;

Listen to uplink information;

When uplink data sent by the terminal is obtained in the time slot corresponding to the terminal, a reply message is sent to the designated wireless node terminal; the reply message includes a receive function enable bit; the receive function enable bit is used to control the enable and disable of the terminal receive function;

Wait for the terminal receiving function to be turned on;

Send downlink data/configuration information to the designated wireless node terminal in the subsequent reserved time slot;

Determine whether the downlink confirmation is delivered. If yes, the process ends; if not, return to the step of listening to the uplink information; the downlink confirmation is the reply response sent by the wireless node terminal to the gateway after receiving the downlink data/configuration data.

Furthermore, the frame format for sending the reply and controlling the receiving function instruction includes: a frame header, a terminal destination address, a confirmation response bit, a wireless receiving start flag bit, a check bit and a frame tail.

Furthermore, according to the actual downlink data ratio in the application environment of the industrial wireless system, a reserved time slot is added after each k time slots are configured to process downlink event data.

Furthermore, if there are multiple downlink demands in the terminal in k consecutive time slots, they are sent in sequence in the subsequent idle reserved time slots.

Furthermore, after receiving the downlink data or configuration information from the upper computer or the management platform, the method further includes: determining the address of the terminal that needs to be downlinked.

On the other hand, the present invention also discloses a wireless control transmission method based on gateway time slot scheduling, which is characterized in that it is applied to a wireless node terminal in an industrial wireless system for uploading low-power time slot packets; the gateway in the industrial wireless system allocates corresponding time slot numbers to each wireless node terminal according to the order in which the wireless node terminals in the industrial wireless system are powered on and connected to the network, and adds a reserved time slot after configuring every k time slots to process downlink event data; the method comprises:

After the wireless node terminal is powered on, the wireless transmission function is turned off and it enters the dormant state;

When uplink data needs to be sent, the wireless node terminal is awakened, the wireless node terminal turns on the wireless transmission function, and sends data information uplink;

After the data is sent, the wireless data receiving function is turned on within a preset time, and a reply message sent by the gateway is waited for within the preset time; the reply message includes a receiving function turn-on bit; the receiving function turn-on bit is used to control the turn-on and turn-off of the terminal receiving function;

If a reply message is received from the gateway, it is determined whether the wireless receiving function needs to be turned on based on the start-up receiving function bit in the reply message. If it needs to be turned on, the time for turning on the wireless reception is extended, and preparation is made to monitor and receive the gateway downlink data information; the downlink data information is sent by the gateway in the subsequent reserved time slot; after completing the downlink data reception, a reply is sent to the gateway and its own wireless receiving function is turned off; if it does not need to be turned on, its own wireless receiving function is turned off.

Furthermore, after the wireless node terminal is powered on and started, it also includes: obtaining the terminal number of the wireless node terminal.

Advantages and positive effects of the present invention:

In the present invention, when the terminal battery mobile device has a high requirement for the use time, the low power consumption mode is adopted to reduce the power consumption of the device. The reply information of the gateway wireless access point is used to control the opening and closing of the terminal wireless transceiver function, further reducing the power consumption of the wireless mobile device and extending the effective use time; at the same time, the reserved time slot event stream scheduling method is adopted to meet the two-way wireless transmission function requirements of the device, meet the communication function of the product, improve the reliability of the device downlink communication, avoid data loss and other problems, and improve the transmission efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

FIG1 is a schematic diagram of the system structure principle in an embodiment of the present invention;

FIG2 is a flow chart of a single terminal wireless receiving function control in an embodiment of the present invention;

FIG3 is a schematic diagram of a gateway time slot scheduling principle in an embodiment of the present invention.

DETAILED DESCRIPTION

In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

The present invention provides a wireless control transmission method based on gateway time slot scheduling. In the case where the mobile terminal in the industrial system has a high requirement for low power consumption, the gateway reduces idle power consumption by controlling the real-time monitoring function of wireless reception, and adopts a time slot scheduling method to ensure the reliability of downlink data transmission.

The present invention is based on the terminal node product of the industrial wireless system for uploading in low-power time slot packets. The industrial wireless system is shown in Figure 1. The system includes several wireless node terminals, wireless access points, gateways, host computers and management systems, wherein each wireless node terminal is wirelessly connected to the gateway through a wireless access point; the host computer and the management system are respectively connected to the gateway for two-way data communication. In the system, the wireless node terminal is powered on and started, and automatically sends a network access request to the gateway until a reply from the gateway is received. At the same time, the synchronization time T of the current gateway and the network access terminal sequence number n of the terminal, that is, the total number of terminals connected to the current gateway, are obtained to complete the network access. The wireless node terminal includes: a wireless radio frequency module, a data acquisition module and a control module; wherein the wireless radio frequency module is used for wireless data transmission and reception, and the data acquisition module is used for receiving data; the control module is used to control the opening and closing of the wireless radio frequency module. After the wireless node terminal successfully enters the network, the wireless radio frequency module is dormant, that is, the wireless data transmission and reception function is turned off. After receiving data from the data acquisition module, according to the alignment time T, the time slot number m corresponding to the terminal sequence number n is waited for to wake up the wireless module for data transmission. The present invention adds a reserved time slot for downlink data transmission based on the terminal grouping time slot. As shown in FIG2 , the specific control mode of downlink data transmission includes the following steps:

The gateway controls the specific individual wireless node terminal to start and stop wireless reception through wireless signals;

Gateway side:

S11, receiving downlink data/configuration information;

When the gateway receives the downlink data or configuration information from the host computer or management platform, it determines the terminal address that needs to be downlinked;

S12, listen to the uplink information, and add the enable receiving function bit to the reply information;

S13, obtaining uplink data sent by the terminal in the time slot corresponding to the terminal;

S14, sending a reply and a control receiving function instruction; the reply information includes a receiving function enable bit; the receiving function enable bit is used to control the opening and closing of the terminal receiving function; at this time, the wireless node terminal side will obtain the reply and instruction (S24);

After receiving the uplink data DATA from the corresponding terminal, the response data ACK is sent. The specific frame format is shown in Table 1, including the frame header, the terminal destination address, the confirmation bit, the wireless reception start flag bit, the check bit and the frame tail.

Table 1

S15, waiting for the terminal receiving function to be turned on;

S16, sending downlink data/configuration information to the designated terminal in the subsequent reserved time slot; at this time, the wireless node terminal side will receive the downlink data until the downlink data is received (S25);

S17, determine whether the downlink confirmation is delivered, if yes, the process ends; if not, return to S12 to continue listening to the uplink information; wherein, the downlink confirmation is the reply response sent by the wireless node terminal side to the gateway after receiving the downlink.

Wireless node terminal side:

S21, the device is powered on and starts to sleep after obtaining the terminal number;

S22, after the device is externally awakened, the terminal sends data information uplink, and the gateway side will obtain the uplink data of the terminal (S13);

S23, briefly enable the receiving function to prepare to receive a reply from the access node;

S24, the terminal obtains a reply and an instruction;

Low-power terminals are usually in sleep mode. When uplink data needs to be sent, the wireless transmission function is turned on. After the data is sent, the wireless data reception function is turned on within a short time (usually milliseconds, 20-30ms). The start time is the Trx receiving window, and the gateway reply ACK is waited for within this time window.

S25. Determine whether to enable reception. If yes, receive downlink data and determine whether the downlink reception is completed. If yes, reply with a response and disable the reception function. If no, keep the reception function disabled.

If a reply is received from the gateway, the corresponding flag is used to determine whether the wireless receiving function needs to be turned on. If it needs to be turned on, the wireless receiving time △trx is extended (usually in seconds, 30-60s, which can be freely configured according to the actual application scenario) to prepare to monitor and receive the gateway downlink data information MES. After completing the downlink data reception, the terminal sends a response message ACK and turns off its own wireless receiving function. The gateway confirms that the downlink is successful and completes the downlink process.

The time slot scheduling method for sending data on the gateway side is shown in Figure 3. Assuming that there are n low-power terminals running for uplink collection, the corresponding time slot numbers 1~m are allocated according to the power-on network. At the same time, according to the actual downlink data ratio of the industrial wireless system application environment, a reserved time slot can be added after every k time slots to process downlink event data. When the gateway receives the data that needs to be sent to the terminal, that is, after receiving the terminal data in the corresponding time slot, the response ACK adds the information bit to start the wireless receiving function. Send downlink data to the designated terminal in the subsequent reserved time slot. If there are multiple downlink requirements in the terminal in k consecutive time slots, that is, there are multiple downlink data sending requirements before the downlink data sending time slot is reached, then send them in sequence in the subsequent idle reserved time slots.

For ease of understanding, the method for scheduling time slots for sending data on the gateway side is described below with a specific example.

The format of the response frame sent by the gateway is shown in Table 2:

Table 2

As shown in Figure 3, assuming that there are 9 low-power terminals running for uplink collection, according to the time slot numbers 1-9 for power-on access to the network, and according to the industrial wireless system application environment configuration, a reserved time slot is added for downlink after every three time slots. When the gateway receives the data that needs to be sent to terminals 1, 4, 6, and 7, that is, after receiving the terminal uplink data in the corresponding time slot, the wireless receiving function information position 1 will be turned on in the response ACK. If there are multiple downlink data requirements among the three terminals, they will be sent in the next idle reserved time slot. For example, after receiving the uplink data of terminals 4 and 6 in time slots 5 and 7, both reply to configure the wireless receiving function to be turned on. The downlink data of terminal 4 is sent in reserved time slot 8, and the downlink data of terminal 6 is sent in the idle time slot 4 of the next time slot cycle.

The method of allocating reserved time slots by the gateway to schedule the downlink data sending time, the gateway responds to control the opening and the terminal autonomously closes the control of the wireless receiving function opening duration, which greatly reduces the terminal's wireless receiving monitoring power consumption and ensures the reliability of two-way data transmission.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. A wireless control transmission method based on gateway time slot scheduling, characterized in that it is applied to a gateway in an industrial wireless system for uploading low-power time slot packets; the gateway allocates corresponding time slot numbers to each wireless node terminal according to the order in which the wireless node terminals are powered on and connected to the network in the industrial wireless system, and adds a reserved time slot after configuring every k time slots to process downlink event data; the method comprises: Receive downlink data/configuration information from the host computer or management platform; Listen to uplink information; When uplink data sent by the terminal is obtained in the time slot corresponding to the terminal, a reply message is sent to the designated wireless node terminal; the reply message includes a receive function enable bit; the receive function enable bit is used to control the enable and disable of the terminal receive function; Wait for the terminal receiving function to be turned on; Send downlink data/configuration information to the designated wireless node terminal in the subsequent reserved time slot; Determine whether the downlink confirmation is delivered. If yes, the process ends; if not, return to the step of listening to the uplink information; the downlink confirmation is the reply response sent by the wireless node terminal to the gateway after receiving the downlink data/configuration data. 2. According to the wireless control transmission method based on gateway time slot scheduling described in claim 1, it is characterized in that the frame format of sending reply and control receiving function instructions includes: frame header, terminal destination address, confirmation response bit, wireless reception start flag bit, check bit and frame tail. 3. According to the wireless control transmission method based on gateway time slot scheduling described in claim 1, it is characterized in that according to the actual downlink data ratio of the industrial wireless system application environment, a reserved time slot is added after every k time slots to process downlink event data. 4. A wireless control transmission method based on gateway time slot scheduling according to claim 3, characterized in that if there are multiple downlink demands in the terminal in k consecutive time slots, they are sent in sequence in the subsequent idle reserved time slots. 5. A wireless control transmission method based on gateway time slot scheduling according to claim 1, characterized in that after receiving downlink data or configuration information from a host computer or a management platform, it also includes: determining the address of a terminal that needs to be downlinked. 6. A wireless control transmission method based on gateway time slot scheduling, characterized in that it is applied to a wireless node terminal in an industrial wireless system for uploading low-power time slot packets; the gateway in the industrial wireless system allocates corresponding time slot numbers to each wireless node terminal according to the order in which the wireless node terminals in the industrial wireless system are powered on and connected to the network, and adds a reserved time slot after configuring every k time slots to process downlink event data; the method comprises: After the wireless node terminal is powered on, the wireless transmission function is turned off and it enters the dormant state; When uplink data needs to be sent, the wireless node terminal is awakened, the wireless node terminal turns on the wireless transmission function, and sends data information uplink; After the data is sent, the wireless data receiving function is turned on within a preset time, and a reply message sent by the gateway is waited for within the preset time; the reply message includes a receiving function turn-on bit; the receiving function turn-on bit is used to control the turn-on and turn-off of the terminal receiving function; If a reply message is received from the gateway, it is determined whether the wireless receiving function needs to be turned on based on the start-up receiving function bit in the reply message. If it needs to be turned on, the time for turning on the wireless reception is extended, and preparation is made to monitor and receive the gateway downlink data information; the downlink data information is sent by the gateway in the subsequent reserved time slot; after completing the downlink data reception, a reply is sent to the gateway and its own wireless receiving function is turned off; if it does not need to be turned on, its own wireless receiving function is turned off. 7. According to claim 6, a wireless control transmission method based on gateway time slot scheduling is characterized in that after the wireless node terminal is powered on and started, it also includes: obtaining the terminal number of the wireless node terminal.