RADIO WAKEUP METHOD AND RADIO WAKEUP CIRCUIT
`SEISSSSRSRRRnana
`
`DOCUMENTID
`
`WO-2014176979-Al
`
`DATE PUBLISHED
`
`2014-11-06
`
`INVENTOR INFORMATION
`
`NAME
`
`YU, ZHONG
`GUO, YANG
`
`DATE FILED
`
`2014-04-17
`
`CPC CURRENT
`
`TYPE
`
`CPGI
`
`CPCI
`
`GPCI
`
`CPCI
`
`CGPGA
`
`CGPCA
`
`Abstract
`
`CITY
`
`N/A
`N/A
`
`ZIP CODE
`
`518057
`518057
`
`CPC
`
`HO4W52/0229
`
`HO4W52/0229
`
`HO04W52/0219
`
`HO4W52/0219
`
`Y02D30/70
`
`Y02D30/70
`
`DATE
`
`2013-01-01
`
`2013-01-01
`
`2013-01-01
`
`2013-01-01
`
`2020-08-01
`
`2020-08-01
`
`A radio wakeup method and a radio wakeup circuit, which relate to the technical field of wireless
`communication networks, and solve the problem of the control of a wireless sensor network. The method
`comprises: a node judging a service type of a WBAN network; and according to the service type of the
`WBAN network,the node starting a flow for waking up nodes corresponding to the service type of the WBAN
`network. The technical solution provided in the embodiments of the present invention is applicable to a
`WBAN, and realizes a precisely controllable WBAN.
`
`Description
`
`Radio wake-up method and radio wake-up circuit
`Technical field
`The present invention relates to the field of wireless communication network technologies, and in particular,
`to a radio wake-up method and a radio wake-up circuit in a wireless body area network (WBAN).
`Background technique
`WBAN is a newtype of wireless sensor network that uses sensor nodes distributed on the surface of human
`skin or implanted in the human bodyto collect important information of the human body and transmit the
`information to the central intelligent node. The central intelligent node transmits information to the base
`station through wireless communication. In this way, the identity of the individual can be authenticated, or the
`physiological characteristics of the human body can be monitored, collected, and transmitted wirelessly to
`
`

`

`hospitals, etc., and can also control informationized automobiles, home appliances, and electronic
`equipment of special industries. At present, WBAN has many applications in daily life, medical care,
`entertainment and other fields.
`WBAN hasbeen extensively studied internationally, including medical technology providers, hospitals, and
`insurance companies.
`People from P and the industry are engagedin strategic cooperation, but they are still in the early stage of
`development, facing milliwatt-level network energy consumption, interoperability, system equipment,
`security, sensor verification, data consistency, etc. A series of challenges. The energy of the WBAN node is
`provided by the battery, and the energy is limited. Therefore, reducing energy consumption and improving
`networklifetime have become the focus and difficulty of research.
`The IEEE 802.15 working group formally established the TG6 working group in 2007, dedicated to the
`standardization of WBAN research, and in March 2012 officially released the first draft of the IEEE802.15.6
`standard protocol, which uses the current ISM band and other medical and managementThe frequency
`band approved by the authority supports QoS and satisfies WBAN's low power and high data transmission
`rate (up to 1OMbps) communication requirements.
`The first draft of the IEEE802.15.6 standard protocol mainly specifies the physical layer (PHY) and medium
`access control sublayer (MAC) specifications of WBAN. The MAClayerprotocol is used to reduce the
`energy consumption of wireless sensor networks. There are two main methods, one is to use Duty cycle
`mechanism: When the sensor node has data transmission, the transceiver is in the active state; when the
`node has no data transmission, the transceiver is turned off to enter the sleep state to save energy; the other
`is an additional radio wake-up circuit, The circuit uses a radio signal outside the band to wake up the sensor
`node from the sleep state. Wake up the radio network using two --> Channels, ie data packets, command
`channels and wake-up radio signal channels.
`Summary of the invention
`The present invention provides a radio wake-up method and a radio wake-up circuit that solves the problem
`of wireless sensor network control.
`A radio wake-up method, including:
`The node determines the WBAN networkservice type;
`And the nodestarts a process of waking up the node corresponding to the WBAN networkservice type
`according to the WBAN networkservice type.
`Preferably, the WBAN networkservice type includes:
`The general service type generated under normal conditions without strict time requirements, the type of
`demand serviceinitiated by the network center that requires a sensor node to transmit specified data to the
`network center, and the node needsto transmit the original unplanned emergency data to the center. Type
`of emergency business for business.
`Preferably, when the WBAN networkservice type is a general service type, the processof starting the
`wake-up node corresponding to the WBAN networkservice type according to the WBAN networkservice
`type includes:
`The node enters an active state based on the awake mode, accesses the channel, and waits for a beacon
`of the network center. Preferably, the method further includes:
`The network center transmits a beacon to the node in an active state, the beacon including synchronization,
`priority, channel number, and time slot information.
`Preferably, when the WBAN networkservice type is a required service type or an emergencyservice type,
`the processfor the node to start the wake-up node corresponding to the WBAN networkservice type
`according to the WBAN networkservice type includes:
`The node goes to sleep;
`Receiving, by the node, a wake-up command packet sent by the network center;
`The node checks whether the wakeup authentication code in the received wakeup command packet
`matches the local wakeup authentication code of the node; --> When the node determines that the wakeup
`authentication code in the received wakeup command packet matches the local wakeup authentication code
`of the node, the node starts the main circuit and performs data transmission with the networkcenter.
`Preferably, after the step of starting the process of waking up the node corresponding to the WBAN network
`service type, the method further includes:
`
`

`

`After completing the current data transmission task, the node updates the wakeup authentication code and
`restarts the counter for the wakeup authentication code.
`Preferably, before the step of receiving the wake-up command packet sent by the networkcenter, the
`method further includes: sending, by the network center, the wake-up command packetto the node by using
`a low-power radio frequency signal, where the low-power radio frequency signalis in an ISM frequency band
`And use wake-up authentication code WAC technology.
`The embodiment of the invention further provides a radio wake-up circuit, comprising a communication
`circuit and a power management circuit, wherein the communication circuit is configured to: and the power
`managementcircuit are connected to the CPU of the node;
`The communication circuit is configured to: connect to a network center of the WBAN;
`The power management circuit is configured to: be connected to a power supply loop of the main circuit,
`accept control of the CPU, and supply powerto the main circuit.
`Preferably, the communication circuit is configured to: receive a wake-up command packet sent by the
`network center and forward it to the CPU, and when the CPU confirms that the wake-up authentication code
`in the received wake-up command packet matches the local wake-up authentication code, The power
`management circuit sends a closed signal;
`The power management circuit is configured to: close a circuit that supplies power to the main circuit upon
`receiving the closing signal.
`Preferably, the network center sends a wake-up command packet through a low-power radio frequency
`signal.
`An embodiment of the present invention provides a radio wake-up method and a radio wake-up circuit,
`where a node determines a WBAN networkservice type, and the node starts a flow of a wake-up node
`corresponding to the WBAN network service type according to the WBAN networkservice type, Different
`service types use different wake-up mechanisms to solve the problem of wireless sensor networkcontrol,
`reduce WBAN network power consumption, and extend networklife. --> BRIEF abstract
`1
`is a schematic structural diagram of a sensor node according to Embodiment 1 of the present invention;
`FIG. 2 is a schematic structural diagram of a radio wake-up circuit according to Embodiment1 of the present
`invention; A flowchart of a radio wake-up method; FIG. 4 is a specific flowchart of step 303 in the second
`embodiment of the present invention;
`Figure 5 is a specific flowchart of step 305 in the second embodiment of the present invention;
`FIG. 6 is a flowchart of a radio wake-up method according to Embodiment3 of the present invention; FIG. 7
`is a schematic diagram of a specific implementation of a radio wake-up circuit according to Embodiment4 of
`the present invention.
`Preferred embodiment of the invention
`Embodiments of the present invention will be described in detail below with reference to the accompanying
`drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the
`embodimentsin the present application may bearbitrarily combined with each other.
`The technical solutions of the present invention are described in detail below with reference to the
`accompanying drawings and examples.
`First, the first embodiment of the present invention will be described with reference to the accompanying
`drawings.
`The embodimentof the invention provides a sensor node, and its structure is shown in FIG. 1. On the basis
`of the existing sensor node structure, a wake-up circuit is added, and the structure of the wake-up circuit is
`as shownin FIG. 2, including the communication circuit and the power supply. a managementcircuit,
`wherein the communication circuit and the power managementcircuit are both connected to a CPU ofthe
`node;
`The communication circuit is connected to a network center of the WBAN;
`The power management circuit is connected to the power supply circuit of the main circuit, and receives
`control of the CPU to supply power to the main circuit.
`The communication circuit monitors the WBAN's service allocation, and the power managementcircuit
`provides different levels of power and circuit activation capabilities based on the WBAN service status.
`The wake-up circuit in the WBAN is connected to the main circuit, and the wake-up circuit can wake up the
`CPU andthe main circuit in a sleep state. When the CPU is in a non-working state for a certain period of
`
`

`

`time, the WBANcanbecontrolled by the CPU. --> The main circuit enters the sleep state and activates the
`wake-up circuit. When the wake-up circuit activates the CPU and the main circuit, the main circuit will
`receive the data information of each sensor and establish a data communication link with the network center
`to complete
`WBAN's sensor information processing and delivery and business execution.
`Specifically, the communication circuit receives the wake-up command packetsent by the network center
`and forwardsit to the CPU, and when the CPU confirms that the wake-up authentication code in the
`received wake-up command packet matches the local wake-up authentication code, the power management
`circuit Transmitting a closing signal; the power management circuit closes a circuit that supplies power to the
`main circuit after receiving the closing signal.
`Embodiment 2 of the present invention will be described below with reference to the accompanying
`drawings.
`The embodiment of the present invention provides a method for waking up a sensor node by using the radio
`wake-up method provided by the present invention, as shown in FIG. 3, in combination with the sensor node
`shown in FIG.
`Step 301: The WB AN networkservicesare classified into three types: a general service type generated in a
`normal state withoutstrict time requirements, and a required service typeinitiated by the network center and
`requiring a sensor node to transmit the specified data to the network center. , and the node needsto transmit
`the emergencyservice type of the original unplanned emergency data service to the center. Two different
`types of wake-up mechanisms are usedfor three different types of network services: 1) a wake-up
`mechanism for event-based general service types; 2) a radio wake-up mechanism for demand-type service
`types and emergencyservice types.
`Step 302: The WBAN networkcenter controls the allocation and use of the channel, and allocates
`resources such as channel frequency bands and time slots to the nodes. In the IEEE 802.15.6 protocol,
`channels are divided into TDMA superframes, each superframe contains a beacon, a contention access
`phase CAP, a dedicated access phase EAP, and a non-contention access based on a guard slot GTS.
`Phase CFP four parts.
`Step 303: Multiple access mode. Selecting an FDMA/TDMA-based access modeto allocate a channel, as
`shownin FIG. 4, the method includes: Step 3031: Each nodeis assigned a unique channel by the network
`center;
`Step 3032: Each node occupies a GTSprotection time slot in the superframe non-contention phase CFP
`through TDMA mode, and is used for general service transmission;
`Step 3033, the demand and emergencyservices are in the superframe contention access phase CAP and
`dedicated access phase --> EAP is transmitted.
`Step 304: For general services, the node enters an active state based on the awake mode, accesses the
`channel, and waits for a beacon from the network center. Since the network center knows the awake mode
`of each node, it only sends the beacon to the node in the active state, including the synchronization, priority,
`channel number and time slot.
`Step 305: For demandtraffic and emergencytraffic, the wake-up mechanism allows the node to go to sleep
`and wakeit up by signal transmission from other sensor nodes. A wake-up circuit is introduced in the sensor
`node, which has enough energy to start the wake-up process, and the wake-up signal sent by the network
`center to the node is a low-power RF signal, whichis in the ISM band (2.4 GHz band), and uses the wake-up
`authentication code WAC technology. To ensure the security of wake-up. The wake-up processis shown in
`Figure 5, including:
`Step 3051: The network center sends a wakeup commandpacket to the node.
`Step 3052, the node checks whether the wakeup authentication codein the received wakeup command
`packet is compared with the local wakeup authentication code, and whether it matches;
`Step 3053, if it matches, the wake-up circuit starts the main circuit;
`Step 3054, data transmission between the network center and the node;
`Step 3055, after completing the data transmission task, the network center calculates a new wake-up
`authentication code and sends it to the node to update the wake-up authentication code. Both the network
`center and the node resettheir respective counters.
`Embodiment 3 of the present invention will be described below with reference to the accompanying
`
`

`

`drawings.
`The embodiment of the invention provides a radio wake-up method. The process of completing the radio
`wake-up using the method is as shownin FIG. 6, and includes:
`Step 601: The node determines a WBAN networkservice type.
`In the embodiment of the present invention, the WBAN networkservice type is divided into:
`The general service type generated under normal conditions without strict time requirements, the type of
`demand serviceinitiated by the network center that requires a sensor node to transmit specified data to the
`network center, and the node needsto transmit the original unplanned emergency data to the center. Type
`of emergency business for business.
`In this step, the wake-up circuit in the node determines the service type based on the information received
`from the networkcenter. --> Step 602: The nodestarts, according to the WBAN networkservice type, a
`process of waking up a node corresponding to the WBAN networkservicetype.
`In this step, the specific includes:
`1. When the WBAN networkservice type is a general service type, the node enters an active state based on
`the awake mode, accesses the channel, and waits for a beacon of the networkcenter.
`At the same time, the network center sends a beacon to the node in an active state, the beacon including
`synchronization, priority, channel number, and time slot information.
`2. When the WBAN networkservice type is a demand service type or an emergencyservice type, the node
`enters sleep.
`The network center sends the wake-up command packetto the node by using a low-power radio frequency
`signal, and the low-power radio frequencysignalis in the ISM frequency band and uses the wake-up
`authentication code WACtechnology. The node receives a wake-up commandpacket sent by the network
`center.
`After receiving the wakeup command packet, the node checks whether the wakeup authentication code in
`the received wakeup command packet matches the local wakeup authentication code of the node, and
`determines, in the node, the wakeup authentication in the received wakeup command packet. When the
`code matches the local wakeup authentication code of the node, the node starts the main circuit and
`performs data transmission with the networkcenter.
`After completing the current data transmission task, the node updates the wakeup authentication code and
`restarts the counter for the wakeup authentication code.
`Embodiment 4 of the present invention will be described below with reference to the accompanying
`drawings.
`The embodiment of the present invention provides a specific implementation of a radio wake-up circuit. As
`shownin FIG. 7, the communication circuit includes a CC 1000 radio frequency chip and an amplifier. The
`power managementcircuit includes an MSP430 micro controller and a CC2420 radio frequencychip. The
`power managementcircuit is connected to the power supplycircuit of the main circuit through the CC2420
`RF chip to control the opening and closing of the power supplycircuit.
`It will be understood bythose skilled in the art that all or part of the steps of the above embodiments may be
`implemented using a computer program flow, which may be stored in a computer readable storage medium,
`such as on a corresponding hardware platform (eg, System, device, device, device, etc.) --> In execution,
`one or a combination of the steps of the method embodimentsis included.
`Optionally, all or part of the steps of the foregoing embodiments may also be implemented by using an
`integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or
`multiple modules or steps may be fabricated into a single integrated circuit module. achieve. Thus, the
`invention is not limited to any particular combination of hardware and software.
`The various devices/function modules/functional units in the above embodiments may be implemented
`using a general-purpose computing device, which may be centralized on a single computing device or
`distributed over a network of multiple computing devices.
`Each device/function module/functional unit in the above embodiments can be stored in a computer
`readable storage medium when implemented in the form of a software function module and sold or used as
`a standalone product. The above mentioned computer readable storage medium may be a read only
`memory, a magnetic disk or an optical disk or the like.
`It is to be understood bythose skilled in the art that variations or substitutions are within the scope of the
`
`

`

`present invention. Therefore, the scope of protection of the present invention should be determined by the
`scopeof the claims.
`Industrial Applicability The embodiment of the present invention provides a radio wake-up method anda
`wake-up circuit, where a node determines a WBAN networkservice type, and the node starts a wake-up
`node corresponding to the WBAN networkservice type according to the WBAN networkservice type. The
`process uses different wake-up mechanisms for different service types, solves the problem of wireless
`sensor network control, reduces the power consumption of the WBAN network, and prolongs the network
`life.
`
`Claims
`
`Claims
`1. A radio wake-up method, comprising:
`The node determines the type of networkservice of the radio wake-up circuit (WBAN);
`And the nodestarts a process of waking up the node corresponding to the WBAN networkservice type
`according to the WBAN networkservice type.
`2. The radio wake-up method according to claim 1, wherein the WBAN networkservice type comprises:
`The general service type generated under normal conditions without strict time requirements, the type of
`demand serviceinitiated by the network center that requires a sensor node to transmit specified data to the
`network center, and the node needsto transmit the original unplanned emergency data to the center. Type
`of emergency business for business.
`The radio wake-up method according to claim 2, wherein, when the WBAN networkservice type is a general
`service type, the node starts corresponding to the WBAN networkservice type according to the WB AN
`network service type. The process of waking up a node includes:
`The node enters an active state based on the awake mode, accesses the channel, and waits for a beacon
`of the network center. 4. The radio wake-up method according to claim 3, wherein the method further
`comprises: the network center transmitting a beacon to the node in an active state, the beacon including
`synchronization, priority, channel number, and time slot information.
`The radio wake-up method according to claim 2, wherein, when the WBAN networkservice type is a
`demand service type or an emergency service type, the node starts and the WBAN according to the WBAN
`network service type. The process of waking up the node corresponding to the networkservice type
`includes: the node enters sleep;
`Receiving, by the node, a wake-up command packet sent by the network center;
`The node checks whether the wakeup authentication codein the received wakeup command packet
`matches the local wakeup authentication code of the node;
`Determining, at the node, the wake-up authentication code in the received wake-up command packet and
`the local call of the node --> When the wake-up authentication code matches, the node starts the main circuit
`and performs data transmission with the network center.
`The radio wake-up method according to claim 5, wherein after the step of starting a process of waking up the
`node corresponding to the WBAN networkservice type, the method further comprises:
`After completing the current data transmission task, the node updates the wakeup authentication code and
`restarts the counter for the wakeup authentication code.
`The radio wake-up method according to claim 5, wherein before the step of receiving, by the node, the
`wake-up command packet sent by the network center, the method further includes:
`The network center sends the wake-up command packetto the node by using a low-power radio frequency
`signal, and the low-power radio frequencysignalis in the ISM frequency band and uses the wake-up
`authentication code WACtechnology.
`8. A radio wake-up circuit, comprising: a communication circuit and a power managementcircuit, wherein
`the communication circuit is configured to: and the power managementcircuit is connected to a CPU of the
`node;
`The communication circuit is configured to: connect to a network center of the WBAN;
`
`

`

`The power management circuit is configured to: be connected to a power supply loop of the main circuit,
`accept control of the CPU, and supply powerto the main circuit.
`9. The radio wake-up circuit according to claim 8, wherein
`The communication circuit is configured to: receive a wake-up commandpacket sent by the network center
`and forward it to the CPU, and when the CPU confirms that the wake-up authentication code in the received
`wake-up command packet matches the local wake-up authentication code, the power management circuit
`Send a closedsignal;
`The power management circuit is configured to: close a circuit that supplies power to the main circuit upon
`receiving the closing signal.
`10. The radio wake-up circuit according to claim 9, wherein
`The network center sends a wake-up command packet through a low-power radio frequency signal.
`
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`(57) Abstract:
`a service type of
`anode judging
`The method comprises:
`sensor network.
`networks,
`and solve the problem of
`the control
`of awireless
`up nodes corres -
`the node starting
`a flow for waking
`a WBAN
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