WO2024221600A1 - Communication system - Google Patents

Abstract

The present application provides a communication system, comprising at least one sending end and at least one receiving end communicating with the at least one sending end. Each receiving end comprises: a receiving module, configured to receive, in a wake-up mode, a preamble data frame containing address information and transmitted by the sending end; and a matching control module, connected to the receiving module and configured to control, when the address information conforms to a preset receiving rule, the receiving module to receive, after the preamble data frame is received, a data packet transmitted by the sending end, and to control, when the address information does not conform to the preset receiving rule, the receiving module to enter a sleep mode. The beneficial effects are as follows: in the present application, address information is added into a preamble data frame, a receiving end determines, in a preamble receiving stage, whether to receive a data packet, and when the address information does not conform to a rule, the receiving end does not receive the data packet and enters a sleep mode, thereby reducing the power consumption of the system to the maximum extent.

Description

A communication system Technical Field

The present invention relates to the field of communication technology, and in particular to a communication system.

Background Art

As one of the main communication technologies of the Internet of Things, wireless communication technology is increasingly widely used. Therefore, in the increasingly widespread application of wireless communication technology, high requirements are placed on low power consumption and long-distance transmission of wireless communication systems. In a star network, the gateway sends data packets and the node receives data packets. Different nodes are distinguished by different address information. For address information that matches the node's own address, the node receives the data packet normally; for address information that does not match its own address, the node does not receive data and enters sleep mode, thereby reducing the power consumption of the node end.

However, in the prior art, since the address information is located in the data segment where the payload is located after the preamble, all nodes must completely receive the preamble before receiving the address information in the payload data segment, and then determine whether to receive the data packet. For nodes whose address information does not match, the reception can only be stopped until the payload stage, which consumes a lot of power.

Existing communication systems usually use a large number of linear frequency modulation (chirp) signals as preamble codes. The duration of a linear frequency modulation signal is specifically related to its spectrum width and spreading factor. The larger the spreading factor, the larger the data volume and the longer the duration. In addition, the narrower the spectrum occupied by the linear frequency modulation signal, the lower its transmission rate and the longer the transmission time.

Especially in low-power networking applications, since the nodes are idle most of the time, In order to ensure that the node can successfully receive the data packets sent by the gateway after being awakened, the number of linear frequency modulation signals used in the transmission signal output by the gateway is often increased, resulting in the duration of the preamble being too long, sometimes even exceeding 1 second; and for the node, after being awakened, it will stop receiving only when it detects that the address information does not match. For the node with the mismatched address, it will generate a considerable amount of unnecessary working time. In addition, the longer the receiving node works, the more power it consumes.

Summary of the invention

In order to solve the above technical problems, the present invention provides a communication system.

The technical problem solved by the present invention can be implemented by the following technical solutions: a communication system, comprising at least one transmitting end and at least one receiving end communicating with the at least one transmitting end, each of the receiving ends comprising: a receiving module, for receiving a preamble data frame containing address information transmitted from the transmitting end in a wake-up mode; a matching control module, connected to the receiving module, for controlling the receiving module to receive a data packet transmitted by the transmitting end after the preamble data frame is received when the address information meets a preset receiving rule; and controlling the receiving module to enter a sleep mode when the address information does not meet the preset receiving rule.

Preferably, the receiving module comprises: a demodulation unit, configured to demodulate the address information after receiving the address information, and output the demodulated address information to the matching control module.

Preferably, each of the receiving ends is preset with a receiving end address; the preset receiving rule is that the received address information matches the receiving end address.

Preferably, the matching control module includes: a first control unit, configured to control the receiving module to sleep for a preset time before the preamble data frame is received when the address information conforms to the preset receiving rule and the receiving end is in a preset packet receiving mode. After the sleep time, the device enters the wake-up mode to receive the data packet.

Preferably, the matching control module further includes: a second control unit, for controlling the receiving end to enter the sleep mode after receiving and demodulating the data packet when the receiving end is not in the preset packet receiving mode.

Preferably, the preset sleep time is the remaining reception time of the preamble data frame.

Preferably, the matching control module also includes: a calculation unit, which is used to calculate the remaining reception time of the preamble data frame according to the position of the currently demodulated address information in the preamble data frame and the remaining number of packets of the preamble data frame when the receiving end is in the preset packet receiving mode.

Preferably, the preamble data frame includes at least one basic unit, each of the basic units includes multiple packets, each packet includes a preamble and at least one address information; the remaining number of packets of the data frame is the number indicated by the address information of the last packet of the basic unit received.

Preferably, each of the transmitting ends includes: an address control module, used to select one of the received address identification information and the marking signal of the remaining address information quantity as the address information; a framing module, used to frame the output of the address control module, the preamble code and the payload; a modulator, connected to the framing module, used to modulate the output of the framing module and output a transmission signal, wherein the transmission signal includes the preamble code data frame.

Preferably, each of the transmitting ends further comprises: an address generator connected to the address control module, and configured to configure the memory of the address generator under the action of an external control signal to generate the address identification information.

The advantages or beneficial effects of the technical solution of the present invention are: Address information is added to the data frame so that the receiving end can determine whether to receive the data packet when receiving the preamble. If the address information does not match, the receiving end will not accept the data packet and enter sleep mode, so as to minimize the system power consumption.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a block diagram of a communication system in a preferred embodiment of the present invention;

FIG2 is a structural block diagram of a receiving module in a preferred embodiment of the present invention;

FIG3 is a structural block diagram of a matching control module in a preferred embodiment of the present invention;

FIG4 is a schematic diagram of a preamble data frame in a preferred embodiment of the present invention;

FIG5 is a block diagram of a structure of a transmitting end in a communication system in a preferred embodiment of the present invention;

FIG. 6 is a flow chart of a receiving end in a communication system in a preferred embodiment of the present invention.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

Referring to FIG1 , in a preferred embodiment of the present invention, based on the above-mentioned problems existing in the prior art, a communication system is provided, comprising at least one transmitting end 1 and at least one receiving end (2, 2A, . . . , 2N) communicating with the at least one transmitting end 1, each receiving end respectively comprising: a receiving module 21 for receiving a message transmitted from the transmitting end in a wake-up mode; A preamble data frame containing address information is input; a matching control module 22 is connected to the receiving module 21, and is used to control the receiving module 21 to receive the data packet transmitted by the sending end after the preamble data frame is received when the address information meets a preset receiving rule; and when the address information does not meet the preset receiving rule, the receiving module 21 is controlled to enter a sleep mode.

Specifically, considering that the address information in the prior art is usually located in the data segment where the payload is located, the receiving end node must receive the address information in the payload after receiving the preamble code and then determine whether to receive the data packet, which leads to a large amount of power consumption. In this embodiment, by adding the address information in the data segment where the preamble code is located, the receiving end can receive the address information earlier and decide whether to receive the data packet. Compared with the prior art, the receiving end corresponding to the node whose address information does not conform can enter the sleep mode earlier in the embodiment of the present invention, thereby reducing the system power consumption.

As a preferred implementation, as shown in FIG. 2 , the receiving module 21 includes: a demodulation unit, configured to demodulate the address information after receiving the address information, and output the demodulated address information to the matching control module 22 .

Specifically, in this embodiment, after receiving the address information, the receiving module 21 demodulates the received data through a demodulation unit to generate data that can be sent to the matching control module 22 .

As a preferred implementation, each receiving end is preset with a receiving end address; the preset receiving rule is that the received address information matches the receiving end address.

Specifically, each receiving end corresponds to a receiving end address, and different receiving ends correspond to different receiving end addresses. The receiving end will receive the following data packets only when the received address information matches the receiving end's own address. Therefore, in this embodiment, after the receiving end receives the address information in the preamble stage, it compares the demodulated address information with the receiving end's own address. If the received address information matches the receiving end address, the following data packets are received; If the received address information does not match the receiving end address, it controls itself to enter sleep mode in advance to reduce power consumption.

As a preferred embodiment, as shown in Figure 3, the matching control module 22 includes: a first control unit 221, which is used to control the receiving module 21 to sleep for a preset sleep time before the leading code data frame is received and then enter the wake-up mode to receive the data packet when the address information meets the preset receiving rules and the receiving end is in a preset packet receiving mode.

Specifically, considering that the receiving end corresponding to the node whose address information matches also needs to receive a long preamble before entering the stage of receiving the effective load, it also wastes power. In this embodiment, for the receiving end corresponding to the node whose address information matches, when it is determined that the address information matches, it is temporarily shut down and enters the sleep mode. During this period, the receiving end no longer receives data, and then wakes up when the preamble data frame is sent, and then receives the data packet, thereby minimizing the power consumption of the receiving end.

As a preferred implementation, the preset sleep time is the remaining reception time of the preamble data frame.

Specifically, the preset sleep time is the remaining reception time from the position of the currently successfully matched address information in the data frame to the last frame of the preamble data frame.

Furthermore, the above-mentioned preset packet receiving mode can be a counter mode. In the counter mode, when the sending end sends a data packet, the sending end will mark the number of remaining address information in the preamble code in the address information of the last group of the basic unit in the preamble code data frame, so that when the receiving end receives the preamble code data frame and determines that the address information is consistent, it can estimate the remaining reception time of the preamble code data frame, thereby adjusting the sleep time of the receiving end, thereby reducing power consumption while ensuring that the receiving end can completely receive the data packet.

As a preferred embodiment, as shown in FIG4 , the preamble data frame includes At least one basic unit, each basic unit includes a plurality of packets, each packet includes a leading code and at least one address information; the number of remaining packets of the data frame is the number indicated by the address information of the last packet of the received basic unit.

Specifically, the preamble data frame includes a variable number of repeated basic units. Generally, before the receiving end receives the field of the preamble data frame, the sending end will repeatedly send data of the field where the entire basic unit is located.

As an example but not limitation, the structure of the preamble data frame is shown in Figure 4, where the preamble data frame includes a first basic unit field1, a second basic unit field2, ..., an Nth basic unit fieldN, where N is an integer greater than 0; each basic unit includes four groups: a first group Group1, Group2, Group3, and Group4; each group includes a variable number of preambles preamble and two address information ADDR1 and ADDR2.

Furthermore, in a preferred embodiment, the minimum value of Pg in the first group in a basic unit is 8, and Pg in other groups can be 0. Pg is the preamble number in one group, which is the number of preambles in a group, that is, the number of preambles before ADDR in the Group shown in Figure 4. In all groups, the number of address information is set to 2.

Furthermore, the number of packets in the above-mentioned preamble data frame is predetermined in advance at the transmitting end and the receiving end, and the number of packets at the transmitting end and the receiving end are the same.

Furthermore, the preamble code can be implemented by using an existing linear frequency modulation (chirp) signal, which will not be described in detail here.

As a preferred embodiment, the matching control module 22 further includes: a calculation unit 223, which is used to calculate the remaining receiving time of the preamble data frame according to the position of the currently demodulated address information in the preamble data frame and the remaining number of packets of the preamble data frame when the receiving end is in the preset packet receiving mode, and use the remaining receiving time as the preset sleep time. between.

Specifically, in this embodiment, for the receiving end that meets the receiving rules, that is, when the received address information matches its own address, the position of the address information that successfully matches after demodulation is determined in the preamble data frame, and the number of remaining packets is determined based on the address information of the last packet of a basic unit, and recorded. At the same time, the remaining receiving time of the preamble data frame can be calculated based on the remaining number of packets to determine how long it will take to reach the field where the data packet is located. Before reaching the field where the data packet is located, the receiving end first enters sleep mode and wakes up to continue working after the calculated time is reached.

Furthermore, considering that it takes a certain amount of time for the receiving end to wake up, in this embodiment, a set time can also be preset, and the set time is at least slightly longer than the time it takes for the receiving end to fully wake up from receiving the wake-up command. The preset sleep time is obtained by subtracting the set time from the remaining receiving time calculated above. The above set time can be determined according to the actual application scenario, and the embodiment of the present invention does not limit this.

As a preferred implementation, the matching control module 22 further includes: a second control unit 222, which is used to control the receiving end to enter the sleep mode after receiving and demodulating the data packet when the receiving end is not in the preset packet receiving mode.

Specifically, in this embodiment, when the receiving end is not in the counter mode, for example, in the address mode, the receiving end enters the sleep mode after receiving and demodulating the data packet, so as to avoid the receiving end being awake all the time and causing increased power consumption.

As a preferred embodiment, as shown in FIG. 5 , each transmitting end 1 includes: an address control module 16, which is used to select one of the received address identification information and the mark signal of the remaining address information quantity as the address information; a framing module 17, which is used to frame the output of the address control module 16, the preamble and the payload; a modulator 111, which is connected to the framing module 17, and is used to modulate the output of the framing module 17, A transmission signal is output, wherein the transmission signal includes a preamble data frame.

Specifically, in this embodiment, the transmitting end sends the address information together with the preamble and the effective load to the framing module 17, and after the framing process, the transmitting signal is output through the modulator 111. The transmitting signal includes the preamble data frame containing the address information, and the transmitting signal also includes the effective load located after the preamble data frame. The embodiment of the present invention adds the address information to the data segment where the preamble is located, and identifies different receiving ends through the address information, so that the receiving end can receive the address information earlier and decide whether to receive the data packet, thereby achieving the purpose of reducing the power consumption of the star network; at the same time, on the basis of meeting the system power consumption, the amount of address information can be increased to distinguish more star nodes, and the feasibility of increasing the number of nodes connected to the network is increased.

As a preferred embodiment, each transmitting end 1 further includes: an address generator 12 connected to an address control module 16 for configuring a memory 13 of the address generator 12 under the action of an external control signal to generate address identification information.

Specifically, in this embodiment, the external control signal can be implemented by the external MCU controller 11, and the memory 13 corresponding to the address generator 12 is configured by the external MCU controller 11 to generate an address identification signal, and the address identification signal carries the above-mentioned address identification information.

Furthermore, each transmitting end further includes: a counter 14, and uses the output value of the counter 14 as a marking signal of the amount of the remaining address information.

In a preferred embodiment, the transmitting end may further include: a first encoder 15, connected to the counter 14 and the address control module 16, respectively, for encoding the output value of the counter 14 and outputting it to the address control module 16. In a preferred embodiment, after the value output by the variable counter is encoded by the first encoder 15, one value may represent one address identification signal; or one value may represent multiple address identification signals.

Furthermore, the address control module 16 selects one of the address identification information and the mark signal of the number of remaining address information after encoding according to a pre-defined selection strategy and outputs it as the address information.

Furthermore, in a preferred embodiment, the above-predetermined selection strategy can be: in the last group of a basic unit, the mark signal of the number of remaining address information after encoding is selected as output; in other groups, the address identification information is selected as output. Furthermore, the output value of the counter is used to indicate the number of remaining address signals, so as to indicate how long it will take for the remaining part of the preamble data frame currently being received to be synchronously received, so that the receiving end can remain in a dormant state before the data receiving stage, and when it reaches the data receiving stage, it can be re-awakened to receive data.

In the above preferred embodiment, the communication system provided by the embodiment of the present invention includes a transmitting end and a receiving end. The transmitting end adds address information to a preamble data frame based on a linear frequency modulation signal; the receiving end demodulates the received preamble data frame, determines in advance whether to receive a data packet in the preamble stage, and forces the receiving end that does not receive the data packet to enter a sleep mode, thereby reducing system power consumption; the receiving end that receives the data packet sleeps for a period of time and then wakes up and receives the packet after the preamble data frame synchronization is completed.

As shown in FIG5 , at the transmitting end, the external MCU controller 11 transmits the address identification information to the address generator 12 and stores it in the memory 13 corresponding to the address generator 12. At the same time, the output value of the counter 14 is encoded and enters the address control module 16 together with the address identification information, and the address identification information or the counter output value is selected as the address information in a two-choice manner. The framing module 17 combines the preamble output by the preamble generation module 18, the address information output by the address control module 16, and the payload output by the FIFO 19 and encoded by the second encoder 110 to form a data frame structure that can be transmitted, and then modulates the linear frequency modulation signal through the modulator 111 to modulate the address information into the linear frequency modulation signal. In the frequency modulated signal, a transmission signal is generated to be sent to the receiving end.

As shown in Figure 4, the sending end frames the address information, first sends a variable number of preambles, and then sends two address identification signals with address information, thus forming a group; then sends the preamble again, similar to the previous one, after sending a certain number, sends the next group of two address identification signals with address information, and so on, and finally sends all four groups of two address identification signals with address information, and the above sent data constitutes a field of a basic unit. Before reaching the stage of receiving data, the data of an entire basic unit will be repeatedly sent. In the above basic unit, the 4th group of two dedicated information with address information can be replaced by the output value of the counter 14 inside the sending end.

As shown in Figure 6, the judgment and processing flow of the receiving end is as follows: A1, receive the leading code data frame; A2, demodulate the address information; A3, determine whether it matches its own address: if so, enter A4, otherwise enter A8; A4, determine whether it is in counter mode: if so, enter A5, otherwise enter A7; A5, start counting and enter sleep mode; A6, enter wake-up mode after the preset sleep time; A7, receive data packets; A8, enter sleep mode; A9, wait for the next wake-up.

Specifically, at the receiving end, after the first wake-up, the receiving end receives the address recognition signal and demodulates the address information. At this time, the receiving end will compare the demodulated address information with the information stored in itself. If there is a mismatch, it means that this data packet is not sent to the node where the receiving end is located. The receiving end enters a dormant state, ends the current packet reception, and waits for the next wake-up; conversely, if the information matches, the receiving end will continue the current packet reception. Since a packet reception process can be divided into two different modes: counter mode and address mode, therefore, after determining that the information matches, the receiving end will again determine whether to use the counter mode. If the counter mode is used, the receiving end will record the current demodulated memory value and calculate It will calculate how long it will take to reach the data receiving stage, then start counting and enter the sleep state, waiting for the right time to wake up, and then start receiving and demodulating data; if the receiving end uses the address mode, the receiving end will not enter the sleep mode, but will remain in the awake state to demodulate the received data until the entire packet of data is demodulated.

The beneficial effect of adopting the above technical solution is that: the present invention adds address information to the preamble data frame, so that when receiving the preamble, the receiving end can be controlled according to the address information to enter sleep mode, that is, when the receiving end address does not match the address information, the node enters sleep mode, so as to minimize the power consumption of the nodes in the star network.

The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of this specification and illustrations should be included in the protection scope of the present invention.

Claims (9)

A communication system, comprising at least one transmitting end and at least one receiving end communicating with the at least one transmitting end, characterized in that each of the receiving ends comprises: a receiving module, used to receive a preamble data frame containing address information transmitted from the transmitting end in a wake-up mode, the preamble data frame comprising at least one basic unit, each of the basic units comprising a plurality of groups, each group comprising a preamble and at least one address information; a matching control module, connected to the receiving module, used to control the receiving module to receive a data packet transmitted by the transmitting end after the preamble data frame is received when the address information meets a preset receiving rule; and to control the receiving module to enter a sleep mode when the address information does not meet the preset receiving rule; The address information is one of the address identification information and the mark signal of the number of remaining address information after encoding, which is output according to a pre-established selection strategy; the address identification information is generated by configuring the memory corresponding to the address generator through an external MCU controller; the pre-established selection strategy is: in the last group of a basic unit of the preamble data frame, the mark signal of the number of remaining address information after encoding is selected as output; in other groups, the address identification information is selected as output; The matching control module includes: a first control unit, which is used to control the receiving module to sleep for a preset sleep time before the leading code data frame is received and then enter the wake-up mode to receive the data packet when the address information meets the preset receiving rule and the receiving end is in a preset packet receiving mode. The communication system according to claim 1 is characterized in that the receiving module comprises: a demodulation unit, which is used to demodulate the address information after receiving the address information, and output the demodulated address information to the matching control module. The communication system according to claim 1, characterized in that each of the receiving ends is preset with a receiving end address; the preset receiving rule is the received address information Matches the receiving end address. The communication system according to claim 1 is characterized in that the matching control module also includes: a second control unit, which is used to control the receiving end to enter the sleep mode after receiving and demodulating the data packet when the receiving end is not in the preset packet receiving mode. The communication system according to claim 1 is characterized in that the preset sleep time is the remaining reception time of the preamble code data frame. The communication system according to claim 1 is characterized in that the matching control module also includes: a calculation unit, which is used to calculate the remaining reception time of the preamble code data frame according to the position of the currently demodulated address information in the preamble code data frame and the remaining number of packets of the preamble code data frame when the receiving end is in the preset packet receiving mode. The communication system according to claim 6 is characterized in that the number of remaining packets of the data frame is the number indicated by the address information of the last packet of the basic unit that has been received. The communication system according to claim 1 is characterized in that each of the transmitting ends comprises: an address control module, used to select one of the received address identification information and the mark signal of the remaining address information quantity as the address information; a framing module, used to frame the output of the address control module, the preamble code and the payload; a modulator, connected to the framing module, used to modulate the output of the framing module and output a transmission signal, wherein the transmission signal includes the preamble code data frame. The communication system according to claim 8, characterized in that each of the transmitting ends further comprises: an address generator connected to the address control module, configured to configure the memory of the address generator under the action of an external control signal to generate the address identification signal interest.