Wireless communication system transmission control method and system

Abstract

The invention provides a wireless communication system transmission control method, which comprises a plurality of communication node devices, a central node device is arranged, a communication time period is determined, and the central node device and each communication node device carry out periodic communication receiving and sending according to the communication time period. Each communication time period is divided into a heartbeat time slot, a downlink time slot and an uplink time slot; the central node equipment broadcasts and sends system heartbeat in a heartbeat time slot of each communication time period, carries out communication sending in a downlink time slot and carries out communication receiving in an uplink time slot; and other communication node devices are aligned according to the heartbeat time of the system, only perform communication receiving in the downlink time slot and perform communication sending in the uplink time slot. According to the invention, the communication receiving and sending time of all the communication node devices is periodically distributed and controlled, so that the communication interference caused by concurrence of a plurality of communication node devices is effectively solved, and the communication performance and the success rate of a communication system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic communication equipment, and in particular to a transmission control method and system for point-to-point and point-to-multiple wireless communication systems. Background Art

[0002] With the development of wireless communication technology, wireless communication technology has penetrated into all aspects of life such as industry and family, and has become an indispensable part of modern society. For example, wireless communication technologies such as Bluetooth and WiFi are closely related to people's lives. In particular, wireless communication technology can realize point-to-point and point-to-multiple wireless communication systems without using special network topology equipment. For example, wireless communication technologies such as Bluetooth, Lora, and Zigbee can all support point-to-point or point-to-multiple network topologies. Point-to-point and point-to-multiple wireless communication systems have the advantages of low latency, low power consumption, low cost and large capacity. However, in the same wireless communication system, there are generally multiple communication nodes in use and working. Due to the characteristics of the wireless radio frequency itself, when one of the communication nodes is sending, the other communication nodes must be in receiving mode. If multiple nodes send at the same time, communication interference will be formed, resulting in failure to receive.

[0003] As mentioned above, point-to-point and point-to-multiple wireless communication systems lack base station-type network equipment for transmission control and scheduling. Therefore, there is an interference problem caused by concurrency between communication nodes. Therefore, point-to-point and point-to-multiple wireless communication systems need to solve the node concurrency interference problem when they are working. Summary of the invention

[0004] In view of the problems existing in the prior art, a wireless communication system transmission control method and system are provided, which can solve the problem of communication failure caused by interference of multiple nodes in concurrent communication in point-to-point and point-to-multipoint wireless communication systems.

[0005] A first aspect of the present invention provides a transmission control method for a wireless communication system, wherein the wireless communication system includes a plurality of communication node devices and a central node device. The specific transmission control method includes:

[0006] Determine the communication time period according to the characteristics of the wireless communication system, and the central node device and each communication node device perform periodic communication reception and transmission according to the communication time period, wherein each communication time period is divided into a heartbeat time slot, a downlink time slot and an uplink time slot;

[0007] The central node device broadcasts the system heartbeat in the heartbeat time slot of each communication time cycle, sends communications in the downlink time slot, and receives communications in the uplink time slot; other communication node devices determine the downlink time slot and uplink time slot within the communication time cycle based on the system heartbeat, only receive communications in the downlink time slot, and send communications in the uplink time slot.

[0008] As a preferred solution, in other communication node devices, if there is no sending task in the uplink time slot of the passing time period, communication reception can be performed.

[0009] As a preferred solution, the communication time period is divided into N sub-time slots, each sub-time slot is used to perform a communication task; wherein the 1st sub-time slot is used as a heartbeat time slot, the 2nd to (N-1) / 2+1st sub-time slots are used as downlink time slots, and the (N-1) / 2+2 to Nth sub-time slots are used as uplink time slots.

[0010] As a preferred solution, the duration of the sub-time slot meets the minimum communication duration limit of the wireless communication system.

[0011] As a preferred solution, the central node device is an independent entity hardware device or any communication node device in a wireless communication system.

[0012] A second aspect of the present invention provides a wireless communication system transmission control system, comprising:

[0013] The central node device is used to broadcast the system heartbeat in the heartbeat time slot of each communication time period, send communications in the downlink time slot, and receive communications in the uplink time slot;

[0014] At least one communication node device determines a downlink time slot and an uplink time slot within a communication time period according to a system heartbeat, performs only communication reception in the downlink time slot, and performs communication transmission in the uplink time slot;

[0015] Among them, a communication time period is divided into a heartbeat time slot, a downlink time slot and an uplink time slot according to time.

[0016] As a preferred solution, the central node device is an independent entity hardware device or any communication node device in a wireless communication system.

[0017] As a preferred solution, in the communication node device, if there is no sending task in the uplink time slot of the passing time period, communication reception can be performed.

[0018] As a preferred solution, each communication time period is divided into N sub-time slots, and each sub-time slot is used to perform a communication task; wherein the 1st sub-time slot is used as a heartbeat time slot, the 2nd to (N-1) / 2+1st sub-time slots are used as downlink time slots, and the (N-1) / 2+2 to Nth sub-time slots are used as uplink time slots.

[0019] As a preferred solution, the duration of the sub-time slot meets the minimum communication duration limit of the wireless communication system.

[0020] Compared with the prior art, the beneficial effects of adopting the above technical scheme are as follows: the present invention effectively solves the communication interference caused by the concurrency of multiple communication node devices by periodically allocating and controlling the communication reception and transmission time of all communication node devices in the communication system, thereby improving the communication performance and success rate of the communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a flow chart of a transmission control method for a wireless communication system proposed by the present invention.

[0022] Figure 2 The figure is a schematic diagram of time slot allocation for a communication time cycle in one embodiment of the present invention.

[0023] Figure 3 Schematic diagram of communication receiving and transmitting time slot control in one embodiment of the present invention. DETAILED DESCRIPTION

[0024] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar modules or modules with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be construed as limitations on the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0025] Example 1

[0026] The embodiment of the present invention provides a transmission control method for a wireless communication system, wherein the wireless communication system includes a plurality of communication node devices and a central node device. Figure 1 , the specific transmission control method includes:

[0027] The communication time period is determined according to the characteristics of the wireless communication system, and the central node device and each communication node device perform periodic communication reception and transmission according to the communication time period, wherein each communication time period is divided into a heartbeat time slot, a downlink time slot, and an uplink time slot; the central node device broadcasts and sends the system heartbeat in the heartbeat time slot of each communication time period, and performs communication transmission in the downlink time slot, and receives communication in the uplink time slot; other communication node devices determine the downlink time slot and the uplink time slot within the communication time period according to the system heartbeat, and only perform communication reception in the downlink time slot, and perform communication transmission in the uplink time slot. The transmission control method can make the communication reception and transmission moments of all communication nodes in the communication system uniformly aligned in time.

[0028] Specifically, in one embodiment, the central node device may be an independent physical hardware device, or any communication node in the communication system may assume the central node function. The central node device is mainly used to broadcast the system heartbeat and send instructions to other communication nodes in the system.

[0029] For the division of communication time cycle and time slot, please refer to Figure 2 , a specific method is proposed in this embodiment. First, a communication time period T is determined according to the characteristics of the wireless communication system, and the communication system performs periodic communication reception and transmission according to the communication time period.

[0030] In a communication time period, it is divided into N sub-time slots, each of which can be used to perform communication tasks. It should be noted that the length of each sub-time slot must meet the minimum communication time limit of the communication system. The first sub-time slot is used as a heartbeat time slot, the second to (N-1) / 2+1 sub-time slots are used as downlink time slots, and the (N-1) / 2+2 to N sub-time slots are used as uplink time slots.

[0031] Based on the division of the aforementioned communication time period, the central node device broadcasts the system heartbeat every communication time period T, that is, broadcasts the system heartbeat in each heartbeat time slot, and then, in each communication time period T, only sends communication to other communication nodes in the downlink time slot, and only receives communication in the uplink time slot. Please refer to Figure 2 , which shows a time slot control diagram of a communication system consisting of a central node device and two communication node devices. In a communication time period, the central node device broadcasts the system heartbeat in the heartbeat time slot, sends instructions to the communication node device 1 in the downlink sub-time slot 2 in the downlink time slot, sends instructions to the communication node device 2 in the downlink sub-time slot n in the downlink time slot, and completes the reception of data sent by the communication node device 1 in the uplink time slot.

[0032] Other communication node devices in the communication system receive the system heartbeat sent by the central node device, and use the system heartbeat reception time as a reference to reallocate and determine the time of the downlink time slot and the uplink time slot in the communication time period T, that is, other communication node devices align the uplink time slot and the downlink time slot according to the system heartbeat time. Other communication node devices only receive communications in the downlink time slot and can send communications in the uplink time slot. In one embodiment, other communication node devices can receive communications in the uplink time slot if they have no sending tasks in the uplink time slot. Please continue to refer to Figure 2 After the communication node device 1 completes the instruction reception in the downlink time slot, it sends data to the central node device in the uplink sub-time slot 1 in the uplink time slot, and sends data to the communication node device in the uplink sub-time slot 2. After the communication node device 1 completes the instruction reception in the downlink time slot, since there is no sending task, it can receive the data sent by the communication node device 1 in the uplink time slot.

[0033] The point-to-point and point-to-multiple wireless communication system transmission control method proposed in this embodiment effectively solves the communication interference caused by the concurrency of multiple communication nodes by periodically allocating and controlling the communication reception and transmission time of all communication nodes in the communication system, thereby improving the communication performance and success rate of the communication system.

[0034] Example 2

[0035] This embodiment provides a wireless communication system transmission control system, including:

[0036] The central node device is used to broadcast the system heartbeat in the heartbeat time slot of each communication time period, send communications in the downlink time slot, and receive communications in the uplink time slot;

[0037] At least one communication node device determines a downlink time slot and an uplink time slot within a communication time period according to a system heartbeat, performs only communication reception in the downlink time slot, and performs communication transmission in the uplink time slot;

[0038] Among them, a communication time period is divided into a heartbeat time slot, a downlink time slot and an uplink time slot according to time.

[0039] Furthermore, in the communication node device, if there is no sending task in the uplink time slot of the passing time period, communication reception can be performed.

[0040] In this embodiment, each communication time period is divided into N sub-time slots, each of which is used to perform a communication task; wherein the first sub-time slot is used as a heartbeat time slot, the second to (N-1) / 2+1 sub-time slots are used as downlink time slots, and the (N-1) / 2+2 to N sub-time slots are used as uplink time slots. It should be noted that the duration of the sub-time slot meets the minimum communication duration limit of the wireless communication system.

[0041] In this embodiment, the central node device is an independent entity hardware device or any communication node device in a wireless communication system.

[0042] This embodiment also takes a point-to-point and point-to-multipoint wireless communication system composed of four communication node devices as an example to further illustrate the transmission control system proposed by the present invention. Specifically:

[0043] In the wireless communication system, communication node device 1 is a wireless light illumination acquisition device and assumes the function of a central node device. Communication node device 2 and communication node device 3 are wireless lighting control devices, and communication node device 4 is a wireless lighting remote control switch device.

[0044] In this communication system, the communication cycle time T is 500ms, and the communication cycle time T is divided into 1 heartbeat time slot. The downlink time slot includes 2 downlink sub-time slots, and the uplink time slot includes 2 uplink sub-time slots, and each sub-time slot has a duration of 100ms. The central node device, i.e., the wireless light illumination acquisition device, broadcasts the communication system heartbeat in the heartbeat sub-time slot time of the first communication cycle T1. After receiving the system heartbeat, the communication node device 2, the communication node device 3, and the communication node device 4 allocate and determine all uplink time slots and downlink time slots. At this time, the time slots of all nodes in the communication system have been aligned, and the start time of the uplink sub-time slot 1 is the 100th ms, the start time of the uplink sub-time slot 2 is the 200th ms, the start time of the downlink sub-time slot 1 is the 300th ms, and the start time of the downlink sub-time slot 2 is the 400th ms.

[0045] If the communication node device detects that the light is insufficient, it needs to turn on the light. At this time, the system communication cycle is T5, that is, the fifth communication cycle. Communication node device 1 sends a light-on instruction to communication node device 2 in downlink sub-time slot 1, and sends a light-on instruction to communication node device 3 in downlink sub-time slot 2. After receiving the light-on instruction, communication node device 2 turns on the light, and replies to communication node device 1 in uplink sub-time slot 1 that the light has been turned on. After receiving the light-on instruction, communication node device 3 turns on the light, and replies to communication node device 1 in uplink sub-time slot 2 that the light has been turned on.

[0046] If the communication node device 4 is triggered externally and needs to send a light-off command to the communication node device 2, the communication cycle time is T8 and the sub-time slot is the downlink sub-time slot 1. Since the communication node device 4 cannot send communications during the downlink time slot, it needs to wait for the uplink sub-time slot 1 of the T8 cycle to send. When the communication cycle time is T8 and the sub-time slot is the uplink sub-time slot 1, the communication node device 4 sends a light-off command to the communication node device 2.

[0047] This embodiment describes the specific steps of the communication system composed of the communication node device 1 as the central node device and the communication node devices 2, 3, and 4 using the time slot allocation control method to receive and send communications, effectively controlling the communication interference problem caused by the concurrent communication of each node. In practical applications, other communication node devices can be used as central node devices, or the number of communication node devices can be increased or decreased as needed.

[0048] For those skilled in the art, the specific meanings of the above terms in the present invention can be understood in specific situations; the drawings in the embodiments are used to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0049] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A wireless communication system transmission control method, characterized in that: The wireless communication system includes a plurality of communication node devices, and a central node device is provided. The specific transmission control method includes: Determine the communication time period according to the characteristics of the wireless communication system, and the central node device and each communication node device perform periodic communication reception and transmission according to the communication time period, wherein each communication time period is divided into a heartbeat time slot, a downlink time slot and an uplink time slot; The central node device broadcasts the system heartbeat in the heartbeat time slot of each communication time cycle, sends communications in the downlink time slot, and receives communications in the uplink time slot; other communication node devices determine the downlink time slot and uplink time slot within the communication time cycle based on the system heartbeat, only receive communications in the downlink time slot, and send communications in the uplink time slot.

2. The wireless communication system transmission control method according to claim 1, characterized in that: In other communication node devices, if there is no sending task in the uplink time slot of the passing time period, communication reception can be performed.

3. The wireless communication system transmission control method according to claim 1, characterized in that: The communication time period is divided into N sub-time slots, each of which is used to perform a communication task; wherein the first sub-time slot is used as a heartbeat time slot, the second to (N-1) / 2+1 sub-time slots are used as downlink time slots, and the (N-1) / 2+2 to N sub-time slots are used as uplink time slots.

4. The wireless communication system transmission control method according to claim 3, characterized in that: The duration of the sub-time slot meets the minimum communication duration restriction of the wireless communication system.

5. The wireless communication system transmission control method according to claim 1, characterized in that: The central node device is an independent entity hardware device or any communication node device in a wireless communication system.

6. A wireless communication system transmission control system, characterized in that: include: The central node device is used to broadcast the system heartbeat in the heartbeat time slot of each communication time period, send communications in the downlink time slot, and receive communications in the uplink time slot; At least one communication node device determines a downlink time slot and an uplink time slot within a communication time period according to a system heartbeat, performs only communication reception in the downlink time slot, and performs communication transmission in the uplink time slot; Among them, a communication time period is divided into a heartbeat time slot, a downlink time slot and an uplink time slot according to time.

7. The wireless communication system transmission control system according to claim 6, characterized in that: The central node device is an independent entity hardware device or any communication node device in a wireless communication system.

8. The wireless communication system transmission control system according to claim 6, characterized in that: In the communication node device, if there is no sending task in the uplink time slot of the passing time period, communication reception can be performed.

9. The wireless communication system transmission control system according to claim 6, characterized in that: Each communication time period is divided into N sub-time slots, each sub-time slot is used to perform a communication task; wherein the first sub-time slot is used as a heartbeat time slot, the second to (N-1) / 2+1 sub-time slots are used as downlink time slots, and the (N-1) / 2+2 to N sub-time slots are used as uplink time slots.

10. The wireless communication system transmission control system according to claim 9, characterized in that: The duration of the sub-time slot meets the minimum communication duration restriction of the wireless communication system.

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