1.Technical background _
Wireless synchronous modulation technology refers to obtaining trigger responses and making intelligent decisions based on collaborative sensing of changes in the target scene state. It is one of the key supporting technologies of the Edge Collaborative Sensing (EICS) technology, the core technology of Blue AoSound. This technology involves the wireless communication technology field of the wireless Internet of Things edge domain network. Specifically, it mainly involves the wireless communication methods, service mechanisms and processes between network service nodes and low-power target devices (and their groups).
For different intelligent application scenarios, the IoT edge domain with dynamic information interaction characteristics, composed of the IoT edge service node and several surrounding target object devices (i.e., network client devices), is mainly aimed at solving the target object domain and perception control domain. Wireless network communication and information interaction service mechanism and process issues.
According to the wireless communication node topology and protocol architecture, the current short-range, low-power IoT wireless technology can transmit the network topology of wireless multi-point communication between the network service node and the target device (i.e., the network client device). Ways, come down to several basic types of wireless directional broadcast, wireless multi-point connection and wireless Mesh network.
The target devices targeted by the IoT edge domain network and its service nodes do not only include strong intelligent terminal devices like computers and smartphones that support standard wireless network access, have strong resource capabilities, and can install various application software. It also includes mobile or distributed target object devices (such as wearable devices, distributed sensors, peripheral execution devices, etc.) with lower cost, ultra-low power consumption, and relatively weak resource capabilities.
The wireless network communication method between network service nodes and target object devices between devices in the edge domain of the Internet of Things. In many cases, the stability and interoperability of the edge network are more important, without the need for large-volume broadband communications; in When a network service node needs to provide concurrent services to the target device as a client in a "one-to-many" or "many-to-many" manner, in addition to the interoperability issues of dynamic access to the network, it also needs to pursue hardware resources, power consumption and transient state. The balance between response efficiency, that is, one or more service node devices can simultaneously provide synchronous transient triggering and concurrent data transmission services for several target object devices or device groups in low-power standby states.
Multiple collaborative agent nodes with the same or interrelated device network attributes in the edge domain of the Internet of Things form a collaborative agent network system with several surrounding proxy nodes through collaborative distribution networks. The cooperative agent node is managed by the upper cooperative agent node or the network system host (referred to as the "system host"); the service node device can perform wireless scanning and detection on the wireless beacons sent by the target device in different channels or time slots. In an instant (a very short period of time), the state variable feedback of numerous surrounding target devices is monitored and collected; typically, wireless devices can obtain wireless beacons through wireless scanning and detection methods up to dozens to hundreds of times per second. However, since wireless scanning and detection requires a lot of power consumption and resources, the target device that is in a low-power standby state before establishing a wireless connection cannot obtain fast trigger response and concurrency control from the service node device in the same way.
In the existing technology, wireless directional broadcast has a simple topology, less wireless resource usage, high synchronization data transmission efficiency, fast trigger response, simple wireless protocol, and good interoperability, but it has obvious flaws: asymmetric data transmission direction. characteristics, low efficiency of asynchronous data transmission, low efficiency of data reception feedback monitoring and high power consumption of the wireless receiving end.
2.2 Lanaosheng wireless synchronous modulation technology has the following defects in the existing similar technologies:
Although wireless multi-point connection can transmit multi-point two-way wireless data, the wireless data transmission is stable, the asynchronous connection communication is convenient and the security is relatively high, it also has certain shortcomings: such as the response time to establish a connection is long, and it also depends on the environment. And resource factors, wireless channel resources occupy a large amount, especially when the number of client devices is large, the stability of wireless multi-point connections tends to become worse, the wireless transmission distance is shortened, and the wireless transmission power consumption increases.
Although wireless Mesh networks are simple to install and configure, easy to quickly build networks, have flexible wireless transmission paths, strong redundancy mechanisms and communication load balancing, and low wireless transmission power, they also have obvious flaws: such as poor wireless interoperability compatibility, wireless The communication delay is high and the cross-coverage coordination of different wireless standards is poor. Especially low-power client devices are not suitable as relay nodes. The balance between standby power consumption and trigger response time must be solved.
In summary, how to solve the problem of dynamically modulated synchronous concurrent data transmission efficiency, how to save network service resources, how to greatly improve the resource efficiency of concurrent data transmission, how to solve the dynamic balance of synchronous data transmission and reception power consumption, how to solve the wireless reception trigger response The balance with standby power consumption has become a technical problem that needs to be solved urgently.
2. About Lanaosheng wireless synchronous modulation technology
2.1 Technical problems solved by Lanaosheng wireless synchronous modulation technology
The purpose of this technology is to provide a wireless synchronous modulation method and device to solve the problems mentioned in the above background technology.
Therefore, according to the first aspect, this embodiment discloses a wireless synchronous modulation method, the method comprising:
A wireless master device sends a synchronization sequence beacon containing a synchronization modulation identifier to several wireless slave devices in a synchronization matching state;
In the synchronization matching state of the wireless slave device and the wireless master device, keep wireless time slot synchronization in each synchronization time period;
When the wireless slave device receives the synchronization modulation identifier sent by the wireless master device in its synchronization detection reception time slot, it performs synchronization time slot modulation corresponding to the synchronization modulation identifier, and Put the corresponding modulation verification identification into its equipment status beacon;
When the wireless slave device determines that the device itself or its service object is in a potential trigger state, the wireless slave device performs status feedback modulation on the synchronization detection reception time slot according to the associated status monitoring variables, and modulates the synchronization detection reception time slot. The above-mentioned modulation verification identification is placed in its device status beacon.
2.2 Problems with defects in similar competing technologies (→see above)
3.Technical solutions (technical content)
3.1 Overview
This technology is further configured to: when the wireless slave device receives the synchronization data packet contained in the synchronization sequence beacon, the wireless slave device starts to receive the wireless slave device in the synchronization detection reception time slot. The master device sends the synchronization data packet, receives the synchronization data packet in a synchronization time slot modulation manner within the synchronization validity period, and inserts the current status verification code corresponding to the synchronization data packet reception into the synchronization data packet. device status beacon.
This technology is further configured as follows: the synchronization time slot modulation is performed by adjusting associated modulation characteristic parameters, and the modulation characteristic parameters include synchronization detection time slot width, synchronization detection time slot period, synchronization detection time slot One or more sets of parameters for phase and sync detection slot duty cycles.
This technology is further configured as follows: on the premise that the wireless slave device and the wireless master device maintain a synchronized matching state and the synchronization time parameter does not change, the wireless slave device adjusts the The synchronization time slot modulation is automatically performed on the device itself in an adaptive rate modulation manner. The adaptive time slot modulation includes: the synchronization detection time slot width modulation and the synchronization detection time slot period modulation.
This technology is further configured as follows: the synchronization modulation identifier is identification information used by the wireless master device to instruct the wireless slave device with which it maintains a synchronization matching state to perform wireless synchronization reception modulation; the wireless synchronization reception modulation includes : The wireless slave device dynamically adjusts the device's own transmission/reception status and related mode parameters based on the current modulation characteristic parameters according to the synchronization instructions of the wireless master device that maintains synchronization and matching status with it in a given sequence. .
This technology is further configured as follows: the state feedback modulation is to perform the synchronization time slot modulation based on the feedback of the state monitoring variables; the state feedback modulation is the wireless slave device to receive wireless data based on the feedback of the state monitoring variables. A dynamic balance mechanism between the expected trigger response characteristics and the power consumption of synchronous slots.
This technology is further configured as follows: the state monitoring variable is a monitoring physical quantity in the target object device that reflects the current state characteristics of the device itself or the associated service object; when the state monitoring variable reaches or exceeds the set early warning value, the corresponding The duty cycle of the synchronization detection time slot in the wireless mode parameter is accordingly reduced; conversely, when the status monitoring variable exceeds the set expected value, the duty cycle of the synchronization detection time slot is correspondingly increased.
This technology is further configured as follows: the synchronization time slot modulation is the wireless synchronization reception modulation performed by the wireless slave device on the relevant mode parameters of the synchronization detection and reception time slot, and the wireless slave device maintains synchronization matching with it. The synchronization indication of the wireless master device in the status is the wireless reception modulation performed by the device itself.
This technology is further configured as follows: the synchronization sequence beacon includes a group synchronization sequence beacon, used to serve different or multiple target device groups; the group synchronization sequence beacon is used in any one or combination of the following ways to be used by different The identification received by the wireless slave device of the target device group:
1) Different device group IDs;
2) Different synchronization time periods or their magnifications;
3) Different synchronization beacon slot phase or width.
4.Technical effects
4.1 Technical problems solved (technical advancement)
This technology discloses a wireless synchronization modulation method and device, which uses a wireless master device to send synchronization sequence beacons containing synchronization modulation identifiers to several wireless slave devices in a synchronization matching state, thereby solving the problem of dynamically modulated synchronization and concurrent data. transmission efficiency problem, save network service resources, and greatly improve the resource efficiency of concurrent data transmission; through the wireless slave device in the synchronization matching state, the wireless time slot synchronization is maintained in each synchronization time period, and the synchronization validity period is at least Perform a synchronization time correction to solve the problem of synchronization time accuracy and synchronization matching stability in the synchronization matching state. By improving the detection time slot efficiency, the trigger reception response speed and success rate in the low power consumption state are improved; when The wireless slave device receives the synchronization modulation identification in its synchronization detection reception time slot, performs the corresponding synchronization time slot modulation, and places the corresponding modulation verification identification into its device status beacon, thereby enabling the wireless The master device can balance plan and adjust the expected performance requirements of wireless data reception and synchronization time slot power consumption to solve the dynamic balance problem of synchronization data transmission and reception power consumption; when the wireless slave device is in a potential trigger state, according to the correlation The state monitoring variables are used to perform state feedback modulation on the synchronous detection and reception time slots, thereby greatly reducing the standby power consumption of wireless devices that are in a non-potential triggering state most of the time, and solving the balance problem between wireless reception trigger response and standby power consumption. .