CN106230645B - Low-power-consumption wireless communication method used between monitoring node and convergence gateway - Google Patents
Low-power-consumption wireless communication method used between monitoring node and convergence gateway Download PDFInfo
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- CN106230645B CN106230645B CN201610794996.7A CN201610794996A CN106230645B CN 106230645 B CN106230645 B CN 106230645B CN 201610794996 A CN201610794996 A CN 201610794996A CN 106230645 B CN106230645 B CN 106230645B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0806—Configuration setting for initial configuration or provisioning, e.g. plug-and-play
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0823—Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability
- H04L41/0833—Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability for reduction of network energy consumption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/06—Generation of reports
- H04L43/062—Generation of reports related to network traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
- H04L63/0876—Network architectures or network communication protocols for network security for authentication of entities based on the identity of the terminal or configuration, e.g. MAC address, hardware or software configuration or device fingerprint
Abstract
The invention discloses a low-power consumption wireless communication method used between a monitoring node and a convergence gateway. In the data transmission stage, the monitoring node organizes and stores the obtained sensor data in a data packet form; in order to improve transmission efficiency and reduce power consumption, sensor data packets are first segmented or merged to adapt to monitoring service characteristics. And then, the service data frame is subjected to wireless transmission protocol adaptation so as to select the optimal wireless transmission protocol, thereby obtaining the optimal transmission performance and energy-saving efficiency. In order to obtain better energy-saving efficiency, the monitoring node continuously learns and improves a node radio frequency unit awakening dormancy control strategy according to the safety evaluation and energy consumption evaluation results so as to reduce the activity time of the radio frequency unit. The awakening sleep control with learning capability can better adapt to various different intelligent security application scenes, so that the energy consumption efficiency and the system performance are maximized.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the field of wireless communication, intelligent home and intelligent security and protection, and relates to a low-power-consumption wireless communication method for a monitoring node and a convergence gateway.
[ background of the invention ]
In the fields of intelligent home and intelligent security, a general monitoring and control system usually uses a wired system. Taking natural gas leakage monitoring in a kitchen as an example, a traditional monitoring means uses a gas sensor device which is externally powered to be arranged near a gas meter, and sound and light alarm can be started when leakage is detected. Although the system can detect the leakage event more safely, the monitored process data and the detection result cannot be output, and the user cannot know the process data and the detection result in real time, and a communication interface is lacked between the system equipment and the user.
Taking light control as an example, the traditional intelligent light control is usually controlled directly by means of the existing power supply network, or is subjected to networking communication by a power carrier technology and then is controlled in a centralized manner. Such systems still do not enable data interaction with the user.
With the development of wireless technology, in recent years, the near-distance wireless communication technology represented by ZigBee is continuously entering the field of smart home and smart security and protection, and is used for data transmission and control. Indoor data acquisition and control are completed by installing ZigBee nodes on homes, household appliances and security equipment. ZigBee nodes are generally divided into reduced function nodes (RFD) and full function nodes (FFD), which simultaneously act as coordinators. In the application of intelligent home and intelligent security, most of ZigBee nodes adopt a power supply mode, so that the problem of energy consumption of the nodes is not obvious. However, if the power is supplied by a battery, the service life of the battery is greatly shortened due to high power consumption of the ZigBee node in the intelligent security application, and the application effect is affected.
In 2010, bluetooth 4.0 has promoted the short distance wireless transmission technique of low-power consumption, because of it can work at lower consumption level to promote bluetooth equipment's battery powered ability greatly, consequently, widely received attention in intelligent house field. However, in the fields of smart home and smart security, different application scenarios inevitably have different service characteristics, so that a unified standardized wireless transmission protocol cannot achieve low power consumption for each specific application scenario. In other words, for a specific intelligent security application, an existing wireless communication protocol must be designed or modified according to the service characteristics of the intelligent security application, so that the optimal matching between a wireless communication system and a service can be really achieved, the real low power consumption is achieved, and the service life of equipment is prolonged. It is this purpose and significance of the present invention to propose a low power consumption wireless communication method.
[ summary of the invention ]
The invention provides a low-power-consumption wireless communication method used between a monitoring node and a convergence gateway, aiming at wireless communication between devices in an intelligent security system, in particular to wireless communication between the monitoring node and the convergence gateway in the intelligent window intrusion detection system.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a low-power consumption wireless communication method used between a monitoring node and a convergence gateway at least comprises the following three stages:
A) a node registration stage;
the node registration mainly comprises the steps that the monitoring node registers the identity of the convergence gateway, and the convergence gateway initializes the monitoring node;
B) an authentication and encryption stage;
the authentication and encryption mainly comprises the steps that identity authentication is carried out on a monitoring node and a convergence gateway, a corresponding encryption mode is selected for the monitoring node and the convergence gateway which pass the authentication according to the service requirement, and information needing to be encrypted is encrypted;
C) a data transmission stage;
the data transmission stage mainly comprises that the monitoring node reports monitoring data to the convergence gateway by a preset transmission protocol and receives confirmation information or control instruction information from the convergence gateway.
The invention further improves the following steps:
the specific process of the node registration stage that the monitoring node registers the identity to the convergence gateway is as follows:
A1) the monitoring node sends registration request information to the convergence gateway;
A2) and the convergence gateway sends confirmation information and monitoring node initialization setting information to the monitoring nodes after receiving the registration request of the monitoring nodes.
The registration request information sent by the monitoring node to the convergence gateway in the step A1) at least comprises information such as physical ID of the monitoring node, sensor type, sensor number, registration state and the like;
A2) the confirmation information sent by the middle convergence gateway at least comprises a physical ID of the monitoring node, a distributed logic ID and node initialization information; the logical ID distributed by the confirmation information sent by the convergence gateway is the logical ID of the node generated by the physical ID of the node for the convergence gateway through a preset algorithm; the initialization setting information sent by the convergence gateway at least comprises information such as awakening strategy setting, data frame type, service type, wireless protocol type and the like;
registration request information, confirmation information, initialization information can be accomplished by one or more transmissions.
The identity authentication process of the monitoring node and the convergence gateway in the authentication and encryption stage is as follows:
B1) the monitoring node selects an authentication strategy;
B2) the monitoring node initiates an authentication request for the convergence gateway to the convergence gateway, and the convergence gateway responds to the authentication request of the monitoring node;
B3) and the convergence gateway initiates an identity authentication request for the monitoring node, and the monitoring node responds to the identity authentication request of the convergence gateway.
The encryption mode of the authentication and encryption stage is preset by the system to one or more different security levels and encryption modes.
The specific process of the data transmission stage is as follows:
C1) the monitoring node completes the grouping of the sensing data according to a preset format;
C2) the monitoring node performs service adaptation on the data packet according to the monitoring service characteristics of the node;
C3) the monitoring node performs wireless protocol adaptation according to the wireless transmission protocol type and the service characteristics supported by the node;
C4) the monitoring node wakes up the wireless radio frequency unit to send data;
C5) and after the monitoring node finishes data transmission or periodically wakes up, receiving data frame confirmation information or control instruction information from the convergence gateway.
The step C1) of grouping the monitoring node data refers to organizing and storing the obtained sensor data in the form of data groups according to a certain format and sequence; the data frame at least comprises information such as sensor type, data length and the like;
C2) the middle monitoring node performs service adaptation on the data frame according to the task of the current monitoring service; service adaptation means that the data frame is re-packaged, segmented or combined according to service characteristics, and added with service type information to form a new service data frame;
C3) the monitoring node performs wireless protocol adaptation, namely the monitoring node selects a proper wireless protocol, divides or combines a service data frame according to service characteristics, and adds protocol type information to form a new wireless transmission protocol data frame;
C4) the middle monitoring node awakens the wireless radio frequency unit to send data at least comprises awakening the wireless radio frequency unit, acquiring a wireless channel, forming a wireless transmission physical layer data frame and sending the data frame.
The monitoring node awakening radio frequency unit in the step C4) at least comprises periodic node self-awakening and sensor triggering awakening; acquiring a wireless channel refers to acquiring the wireless channel for sending to a convergence gateway by adopting a proper wireless channel allocation or competition mechanism; the forming of the wireless transmission physical layer data frame refers to that the wireless transmission protocol data frame is re-divided or combined according to the physical layer frame format specified by the selected wireless protocol, and information such as the physical layer frame format, the data length and the like is added to form a new physical layer data frame for wireless transmission.
The monitoring node in the step C4) periodically wakes up the radio frequency unit, and the wake-up period of the radio frequency unit is learned and adjusted by the monitoring node according to the service characteristics, the node energy consumption state and the security policy; the monitoring node awakening period can be adjusted within a certain value interval according to the evaluation result of the awakening strategy; the monitoring node wake-up period is that the wireless radio frequency is started at the starting point of the period to receive or send data, and then the monitoring node wake-up period sleeps until the starting time of the next period.
Compared with the prior art, the invention has the following beneficial effects:
the low-power-consumption wireless communication method for the monitoring node and the convergence gateway comprises three stages of node registration, authentication and encryption and wireless data transmission. The two stages conveniently solve the problem of convenient system addition after the replacement and change of the monitoring node and also solve the problem of identity and data safety of the node in the system. The technical ideas of service adaptation and protocol adaptation of sensor data are provided in a wireless transmission stage, a data encapsulation result with optimal performance can be provided for a system, and the existing multiple wireless transmission technologies are conveniently supported. The awakening mode design of the monitoring node adopts the awakening period with variable period based on the service characteristics and the security strategy, so that the system security requirement can be met to the maximum extent, and the energy consumption level of the monitoring node is reduced to the maximum extent. The provided wake-up mode based on sensor triggering can start the radio frequency unit of the monitoring node in real time and send monitoring data when the node evaluates that data needs to be sent, and can ensure the real-time performance of system safety information transmission. In summary, the present invention can provide an intelligent service-adaptive low-power consumption wireless communication method between the monitoring node and the convergence gateway, so that the monitoring node is optimized in terms of battery power supply capability and safety performance.
[ description of the drawings ]
Fig. 1 is a schematic diagram of a communication process between a monitoring node and a convergence gateway in the embodiment of the present invention;
fig. 2 is a schematic diagram of a communication process in a registration phase of a monitoring node according to the embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a communication process of the monitoring node in the authentication and encryption phases in the embodiment of the present invention;
FIG. 4 is a schematic diagram of a communication protocol framework of a monitoring node and a convergence gateway in the embodiment of the invention;
FIG. 5 is a schematic diagram of the monitoring node wake-up control module according to the embodiment;
fig. 6 is a schematic diagram of the wake-up timing of the monitoring node in the embodiment.
[ detailed description ] embodiments
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the process of the low-power wireless communication method between a monitoring node and a convergence gateway provided by the present invention is divided into at least three stages, the first stage is a node registration stage 01, the second stage is an authentication and encryption stage 02, and the third stage is a data transmission stage 03.
The node registration stage 01 mainly includes that the monitoring node registers the identity of the convergence gateway, and the convergence gateway initializes the monitoring node.
The authentication and encryption stage 02 mainly includes the steps of performing identity authentication on the monitoring node and the convergence gateway, selecting a proper encryption mode through the authenticated monitoring node and the convergence gateway, and encrypting information to be encrypted.
The data transmission stage 03 mainly includes that the monitoring node reports monitoring data to the convergence gateway according to a predetermined transmission protocol, and receives confirmation information or control instruction information from the convergence gateway.
Further, the monitoring node registration process is shown in fig. 2, and the process at least includes step S101 and step S102.
In step S101, the monitoring node sends registration request information to the convergence gateway; the information at least comprises information such as physical ID of the monitoring node, sensor type, sensor quantity, registration state and the like.
More specifically, a data value taking embodiment is that the physical ID of the monitoring node is 16-system 0x00, the sensor type is vibration, the number of sensors is 1, and the registration state is unregistered.
In step S102, the convergence gateway sends confirmation information and initialization setting information to the monitoring node after receiving the registration request of the monitoring node; the confirmation information sent by the convergence gateway at least comprises the physical ID and the distributed logic ID of the monitoring node; the initialization setting information sent by the convergence gateway at least comprises information such as awakening strategy setting, data frame type, service type, wireless protocol type and the like;
more specifically, a data value is implemented in such a way that the physical ID of a node is 0x00 in a 16-system manner, and the assigned logical ID of the node is 0x01 in the 16-system manner; this represents an acknowledgement of the node registration information and is assigned to a new logical address; the wake-up strategy in the initialization setting information is set as sensor wake-up, the data frame type is short frame, the service type is mobile monitoring, and the wireless protocol type is Bluetooth 4.0; this is an example of an implementation, and further setting information may be possible in a specific implementation, and is not limited to the name and type information mentioned herein.
Further, the registration request information, the confirmation information, and the initialization information in steps S101 and S102 may be completed by one or more transmissions.
Further, the authentication and encryption process between the monitoring node and the convergence gateway is shown in fig. 3, and the monitoring node first selects an authentication policy and then performs the authentication step shown in fig. 3.
In step S201, the monitoring node initiates an authentication request to the convergence gateway; in step S202, the convergence gateway responds to the authentication request of the monitoring node, authenticates the monitoring node if necessary, and after receiving the authentication request, the monitoring node responds to the request in step S203. Thus, the identity authentication process is completed through mutual interaction.
Further, after the identity authentication is completed, in subsequent interaction and data transmission, the information encryption mode between the monitoring node and the convergence gateway can be preset by the system to one or more different security levels and encryption modes, and the monitoring node and the convergence gateway are selected for use according to service requirements during specific use.
Further, the authentication processes involved in step S201, step S202 and step S102 may be completed by multiple transmissions, which are not all illustrated in fig. 3.
Further, the third phase of the communication between the monitoring node and the aggregation gateway is a data transmission phase, and a communication protocol framework of the data transmission phase is shown in fig. 4. The monitoring node reports monitoring data to the convergence gateway through a predetermined communication protocol and receives confirmation information or control instruction information of the convergence gateway, and the specific embodiment of the communication protocol and the process is as follows:
step S301, the monitoring node completes sensing data grouping according to a preset frame format;
further, monitoring the node data packets in step S301 means that the obtained sensor data is organized and stored in the form of data packets according to a certain format and sequence. The data packet at least comprises information of sensor type, data length and the like.
Step S302, the monitoring node performs service adaptation on the sensor data packet according to the monitoring service characteristics of the node;
further, the monitoring node in step S302 performs service adaptation on the data packet in step S301 according to the task of currently monitoring the service. The service adaptation means that the data packet in step S301 is re-encapsulated, segmented or merged according to the service characteristics, and the adaptation information such as the service type is added to form a new service data frame. Therefore, the sensor data packet may become larger during the packaging process, and may also be divided into smaller units with appropriate size, so as to better complete the matching of the service data characteristics with the transmission capability and performance of the system.
Step S303, the monitoring node performs wireless protocol adaptation according to the wireless transmission protocol type and the service characteristics supported by the node;
further, the step S303 of performing wireless protocol adaptation by the monitoring node means that the monitoring node selects a suitable wireless protocol, divides or merges the service data frame in the step S302 according to the service characteristics, and adds protocol adaptation information such as protocol type information to form a new wireless transmission protocol data frame. One specific embodiment is that when the monitoring node supports both WiFi and bluetooth 4.0 wireless protocols, one of the two wireless protocols may be selected according to transmission distance, service characteristics, power consumption, and the like.
Step S304, the monitoring nodes form a physical layer data frame;
further, in step 304, the monitoring node adds frame preamble, frame synchronization, frame control information, etc. of the physical layer to form a physical layer data frame for wireless transmission.
Step S305, the monitoring node wakes up the wireless radio frequency unit to transmit data, wherein the data at least comprises waking up the wireless radio frequency unit, acquiring a wireless channel, forming a wireless transmission physical layer data frame and transmitting the data frame.
Further, the monitoring node receives data frame confirmation information or control instruction information from the convergence gateway after finishing data transmission or waking up.
Further, the monitoring node wake-up rf unit in step S305 at least includes periodic node self-wake-up and sensor trigger wake-up; the communication module of the monitoring node at least comprises a wake-up control module, and the components of the wake-up control module are shown in fig. 5.
Referring to fig. 5, the wake-up control module at least includes a security evaluation module 11, an energy consumption evaluation module 12, a wake-up policy module 13, a sensor wake-up module 14, and a periodic self-wake-up module 15. The selection and setting of the awakening strategy need to consider security evaluation and energy consumption evaluation at first; specifically, the security assessment 11 is a method for comprehensively assessing the wakeup mode and wakeup cycle of the node in real time by the convergence gateway according to the security requirement, intrusion security detection capability and monitoring data reporting of the current monitoring node on the service. Meanwhile, the energy consumption level of the monitoring node is also an important reference for deciding the wake-up mode and the wake-up period. Obviously, in order to save more energy consumption, the longer the sleep time of the monitoring node is, the better the sleep time is; however, the long sleep period may bring poor real-time performance of service reporting, and may affect the security of the monitoring system. Therefore, the energy consumption evaluation module 12 gives the wake-up policy on the basis of energy consumption. The wake policy module 13 is used for comprehensively deciding the wake mode and setting parameters thereof based on the results given by the security evaluation module 11 and the energy consumption evaluation module 12. In particular, the module may continually improve the wake-up policy based on a method of machine learning to optimize node performance. The sensor wake-up module 14 and the periodic self-wake-up module 15 respectively complete wake-up and sleep control of the node radio frequency unit. The specific operation mode of the sensor wake-up module 14 is that when the sensor monitors a signal exceeding a threshold, a trigger signal is generated to start the radio frequency unit of the monitoring node to complete the transmission and reception of data. And when the data transmission and the corresponding reception are finished, the monitoring node automatically enters the sleep state until being awakened again.
Further, the periodic self-wake-up in fig. 5 may be adjusted within a certain value interval according to the evaluation result of the wake-up policy; specifically, the monitoring node wake-up period is that a radio frequency is started at the start of a period to receive or send data, and then the monitoring node wake-up period sleeps until the start time of the next period.
Further, the timing sequence of the monitoring node working in the periodic self-wake-up is shown in fig. 6. And the monitoring node starts the radio frequency unit at the starting moment of each awakening period to transmit and receive data, and then enters a dormant state until the next period starts. In the specific implementation process, the wake-up period, the wake-up time, the sleep time, and the transceiver timing after wake-up may all be different according to specific system settings, and only the operation principle and the basic manner thereof are described herein.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (4)
1. A low-power consumption wireless communication method used between a monitoring node and a convergence gateway is characterized by at least comprising the following three stages:
A) a node registration stage;
the node registration mainly comprises the steps that the monitoring node registers the identity of the convergence gateway, and the convergence gateway initializes the monitoring node; the specific process of identity registration of the monitoring node to the convergence gateway in the node registration stage is as follows:
A1) the monitoring node sends registration request information to the convergence gateway; the registration request information sent by the monitoring node to the convergence gateway at least comprises a physical ID of the monitoring node, the type of the sensor, the number of the sensors and registration state information;
A2) after receiving the registration request information of the monitoring node, the convergence gateway sends confirmation information and initialization setting information of the monitoring node to the monitoring node; the confirmation information sent by the convergence gateway at least comprises a physical ID of the monitoring node, a distributed logic ID and node initialization information; the distributed logic ID of the confirmation information sent by the convergence gateway is the node logic ID generated by the physical ID of the node for the convergence gateway through a preset algorithm; the initialization setting information sent by the convergence gateway at least comprises information of awakening strategy setting, data frame type, service type and wireless protocol type;
the registration request information, the confirmation information and the initialization setting information can be sent once or for multiple times;
B) an authentication and encryption stage;
the authentication and encryption mainly comprises the steps that identity authentication is carried out on a monitoring node and a convergence gateway, a corresponding encryption mode is selected for the monitoring node and the convergence gateway which pass the authentication according to the service requirement, and information needing to be encrypted is encrypted; the identity authentication process of the monitoring node and the convergence gateway in the authentication and encryption stage is as follows:
B1) the monitoring node selects an authentication strategy;
B2) the monitoring node initiates an authentication request for the convergence gateway to the convergence gateway, and the convergence gateway responds to the authentication request of the monitoring node;
B3) the convergence gateway initiates an identity authentication request for the monitoring node, and the monitoring node responds to the identity authentication request of the convergence gateway;
C) a data transmission stage;
the data transmission stage mainly comprises that a monitoring node reports monitoring data to a convergence gateway by a preset transmission protocol and receives confirmation information or control instruction information from the convergence gateway; the specific process of the data transmission stage is as follows:
C1) the monitoring node completes the grouping of the sensing data according to a preset format; the monitoring node sensing data grouping refers to organizing and storing the obtained sensor data in a data grouping mode according to a certain format and sequence; the data frame at least comprises sensor type and data length information;
C2) the monitoring node performs service adaptation on the data packet according to the monitoring service characteristics of the node; the monitoring node performs service adaptation on the data frame according to the task of the current monitoring service; service adaptation means that the data frame is re-packaged, segmented or combined according to service characteristics, and added with service type information to form a new service data frame;
C3) the monitoring node performs wireless protocol adaptation according to the wireless transmission protocol type and the service characteristics supported by the node; the monitoring node performs wireless protocol adaptation, namely the monitoring node selects a proper wireless protocol, divides or combines a service data frame according to service characteristics, and adds wireless protocol type information to form a new wireless transmission protocol data frame;
C4) the monitoring node wakes up the wireless radio frequency unit to send data; the monitoring node awakens the wireless radio frequency unit to transmit data at least comprises awakening the wireless radio frequency unit, acquiring a wireless channel, forming a wireless transmission physical layer data frame and transmitting the data frame;
C5) and after the monitoring node finishes data transmission or periodically wakes up, receiving data frame confirmation information or control instruction information from the convergence gateway.
2. The method for low power consumption wireless communication between a monitoring node and a convergence gateway of claim 1, wherein the encryption manner of the authentication and encryption phase is predetermined by a system to one or more different security levels and encryption manners.
3. The method for low-power wireless communication between a monitoring node and a convergence gateway according to claim 1, wherein the step C4) of waking up the radio frequency unit by the monitoring node at least comprises periodic self-wake-up of the node and sensor-triggered wake-up; acquiring a wireless channel refers to acquiring the wireless channel for sending to a convergence gateway by adopting a proper wireless channel allocation or competition mechanism; the forming of the wireless transmission physical layer data frame refers to that the wireless transmission protocol data frame is re-divided or combined according to the physical layer frame format specified by the selected wireless protocol, and the physical layer frame format and the data length information are added to form a new physical layer data frame for wireless transmission.
4. The method according to claim 3, wherein the monitoring node in step C4) wakes up the RF unit periodically, and the wake-up period is learned and adjusted by the monitoring node according to the service characteristics, the node energy consumption status and the security policy; the monitoring node awakening period is adjusted within a certain value interval according to the evaluation result of the awakening strategy; the monitoring node wake-up period is that the wireless radio frequency is started at the starting point of the period to receive or send data, and then the monitoring node wake-up period sleeps until the starting time of the next period.
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| CN102546184B (en) * | 2012-02-17 | 2015-05-27 | 北京海联捷讯科技股份有限公司 | Method and system for message secure transmission or key distribution in sensor network |
| CN103312682B (en) * | 2012-03-16 | 2016-12-14 | 中兴通讯股份有限公司 | The method and system that gateway security accesses |
| CN102695204A (en) * | 2012-04-24 | 2012-09-26 | 北京讯风光通信技术开发有限责任公司 | Business control method used in industrial wireless network, and system thereof |
| CN104918339A (en) * | 2014-03-12 | 2015-09-16 | 国家电网公司 | Wireless sensor network communication control method and device |
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