WO2014161256A1

WO2014161256A1 - Data transmission method, apparatus, and system

Info

Publication number: WO2014161256A1
Application number: PCT/CN2013/081327
Authority: WO
Inventors: 禹忠
Original assignee: 中兴通讯股份有限公司
Priority date: 2013-04-01
Filing date: 2013-08-12
Publication date: 2014-10-09
Also published as: CN104105089A

Abstract

Disclosed are a data transmission method, apparatus, and system. The method comprises: a first node receiving a wakeup message sent by a second node, the wakeup message carrying a wakeup authentication code matching a local wakeup authentication code of a node currently needing to be woke up; the first node comparing a local wakeup authentication code of the first node with the wakeup authentication code; and if they match each other, the first node performing data transmission with the second node. In the present invention, security setting, namely, the wakeup authentication code, is used, so as to not only avoid that another user intentionally or unintentionally wakes up a sensing node in a wireless body area network, thereby ensuring network security; but also avoid unnecessary energy consumption caused by periodically waking up a sensing node, thereby reducing network power consumption of the wireless body area network. In this case, a service life of the network is lengthened.

Description

Data transmission method, device and system

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a data transmission method, apparatus, and system. BACKGROUND A wireless body area network (WBAN) is a new type of wireless sensor network in which nodes are distributed in the human body and on the surface to communicate in the human body. The utility model is mainly used for monitoring and acquiring human physiological data in real time. Provide data support for the physical condition of the human body. At present, WBAN has many applications in our daily life, medical care, entertainment and other fields. The energy of the WBAN node is provided by the battery, and the energy is limited. Therefore, reducing energy consumption and improving network lifetime become the research focus. Wireless body area network is an emerging application field. The international research on WBAN mainly focuses on physical channel, media access control (MAC), antenna design and hardware implementation. The Institute of Electrical and Electronics Engineers (IEEE) 802.15 working group officially established the TG6 working group in 2007, dedicated to the standardization of WBAN, and officially released IEEE802.15.6 in March 2012. Standard agreement. The IEEE 802.15.6 standard is applicable to short-range wireless communication around the human body or in the human body (but not limited to the human body). It uses the current Industrial Scientific Medical (ISM) band and other bands approved by medical and regulatory authorities. Supports Quality of Service (QoS), especially meeting the communication requirements of WBAN's low power and high data transmission rate (up to 10Mbps). This standard mainly specifies the physical layer and MAC layer of WBAN. In order to save energy, IEEE802.15.6 stipulates that the working mode of the WBAN sensor node mainly has two types: always on and on, which are always enabled to keep the transceiver of the sensor node open regardless of whether the sensor node has information transmission; The cycle is turned on by the control of the clock, allowing the sensor node to sleep and wake up according to a certain time period principle. Both of the above solutions will cause unnecessary consumption of battery energy of the WBAN sensor node. Therefore, the method of radio trigger wake-up can be adopted, that is, "read and use at any time", which can effectively reduce the energy consumption of the sensor node and prolong the service life. Introducing the "wake-up/sleep" mechanism in the wireless body area network sensor node can effectively reduce the working time of the sensor node and prolong the life of the node. However, the existing wireless wake-up method does not consider the protection of the wireless wake-up circuit. Whether intentional or unintentional, external users can freely wake up the sensor components in the wireless body area network by radio signals. Loss of privacy information, leakage, power consumption, and even sensor node failure. Therefore, the security issue is an important issue to be solved in the wireless wake-up solution. In view of the low security of the wireless wake-up mechanism of the wireless body area network in the related art, an effective solution has not been proposed yet. SUMMARY OF THE INVENTION Embodiments of the present invention provide a data transmission method, apparatus, and system, to at least solve the problem of low security of a wireless wake-up mechanism of a wireless body area network in the related art. According to an aspect of the present invention, a data transmission method is provided, including: receiving, by a first node, a wakeup message sent by a second node, where the wakeup message carries a local wakeup authentication with a node that needs to wake up currently Code matching wake-up authentication code; the first node compares its local wake-up authentication code with the wake-up authentication code; if matched, the first node performs data transmission with the second node. Preferably, before the first node receives the wake-up message sent by the second node, the method further includes: the second node starting the wake-up link by using the wake-up frequency band, where the wake-up frequency band is used to transmit the wake-up message The second node sends the wake-up message to the first node by using the wake-up link. Preferably, the data transmission by the first node and the second node includes: the first node starts a circuit to be used for data transmission by using a wake-up circuit, and starts a data link by using a data frequency band, where The data frequency band is used for transmitting communication data, the circuit is in a sleep state when no data transmission is performed, and the power consumption of the wake-up circuit is lower than the power consumption of the circuit; the first node uses the digital link and the The second node performs data transmission. Preferably, when data transmission is not performed, the data link enters sleep, the wake-up link maintains timing monitoring, and wakes up the data link when receiving signals transmitted by other nodes. Preferably, after the first node and the second node perform data transmission, the method further includes: the first node and the second node respectively update respective wakeup authentication codes and counters, where The counter is set to generate the wake-up authentication code. Preferably, the data transmission method is applied to a wireless body area network. According to another aspect of the present invention, a data transmission apparatus is provided, including: a receiving module, configured to receive a wake-up message sent by another node, where the wake-up message carries a local wake-up with a node that needs to wake up currently Authentication code matching wake-up authentication code; comparison module, set to compare its local wake-up authentication code And the wake-up authentication code; the data transmission module is configured to perform data transmission with the other node if the local wake-up authentication code matches the wake-up authentication code. Preferably, the device further includes: an opening module, configured to enable a wake-up link by using an wake-up frequency band, wherein the wake-up frequency band is used to transmit the wake-up message; and the sending module is configured to use the wake-up link to Other nodes send the wake up message. Preferably, the data transmission module includes: an activation unit, configured to start a circuit required for data transmission by using a wake-up circuit, and open a data link through a data frequency band, where the data frequency band is used for transmitting communication data, The circuit is in a sleep state when no data transmission is performed, the power consumption of the wake-up circuit is lower than the power consumption of the circuit; and the data transmission unit is configured to perform data transmission with the other nodes by using the digital link. Preferably, when data transmission is not performed, the data link enters sleep, the wake-up link maintains timing listening, and the data link is awakened when receiving signals transmitted by the other node. Advantageously, the apparatus further comprises: an update module configured to update the local wake-up authentication code and the counter, wherein the counter is configured to generate the wake-up authentication code. Preferably, the data transmission device is applied to a wireless body area network. According to still another aspect of the embodiments of the present invention, a data transmission system is provided for use in a wireless body area network, including at least one node, wherein the node includes any one of the foregoing data transmission devices. By using the security setting of the wake-up authentication code, the user not only intentionally or unintentionally wakes up the sensing node in the wireless body area network, but also ensures network security and avoids the cycle wake-up sensor node. Unnecessary energy consumption reduces network power consumption of the wireless body area network, thereby extending network life. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a flowchart of a data transmission method according to an embodiment of the present invention; FIG. 2 is a structural block diagram of a data transmission apparatus according to an embodiment of the present invention; and FIG. 3 is a data transmission apparatus according to an embodiment of the present invention. Preferred block diagram 4 is a block diagram of a preferred structure of a data transmission apparatus according to an embodiment of the present invention; FIG. 5 is a block diagram of a hardware circuit according to a preferred embodiment of the present invention; FIG. 6 is a data transmission method according to a preferred embodiment of the present invention. schematic diagram. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. The embodiment of the present invention provides a data transmission method. FIG. 1 is a flowchart of a data transmission method according to an embodiment of the present invention. As shown in FIG. 1, the following steps S102 to S106 are included. Step S102: The first node receives the wake-up message sent by the second node, where the wake-up message carries the wake-up authentication code that matches the local wake-up authentication code of the node that needs to wake up. Step S104, the first node compares its local wakeup authentication code with the wakeup authentication code. Step S106, if matching, the first node performs data transmission with the second node. In the related art, the radio wake-up mechanism of the wireless body area network is less secure. Through the above steps, the security setting of the wake-up authentication code not only avoids other users intentionally or unintentionally waking up the sensor nodes in the wireless body area network, but also ensures network security and avoids unnecessary energy caused by periodically waking up the sensor nodes. Consumption reduces network power consumption of the wireless body area network, thereby extending network life. Preferably, the foregoing data transmission method may be applied to a wireless body area network, the first node may be a sensor node, and the second node may be a central control node. The wake-up authentication code may be a key, a barcode, or the like that can identify the matching information. Considering the Federal Communications Commission (FCC) for Medical Implant Communications Services (Medical Implant Communications Services, referred to as

The use of MICS) is limited. In a preferred embodiment, the sensing node (for example, an in vivo implanted node) adopts a wireless design structure different from the prior art in the wake-up access process, that is, a dual wireless structure, and transmits the wake-up signal with The transmission of communication data is performed in two links, for example, the ISM band of 2.45 GHz is used to transmit wake-up signals, and the MICS band is used to transmit communication data. Based on the above dual wireless structure, in a preferred embodiment, the wake-up node and the data transmission process are as follows: Before the first node receives the wake-up message sent by the second node, the method further includes: the second node starts the wake-up link by using the wake-up frequency band, where the wake-up frequency band is used to transmit the wake-up message; A node sends a wake-up message. The first node and the second node perform data transmission, including: the first node starts a circuit required for data transmission by using a wake-up circuit, and starts a data link by using a data frequency band, where the data frequency band is used for transmitting communication data, and the circuit is not When the data transmission is in a sleep state, the power consumption of the wake-up circuit is lower than the power consumption of the circuit; the first node uses the digital link to perform data transmission with the second node. In practical applications, the first node and the second node have the same structure, and each includes a wake-up circuit, a processor, and a main circuit (for example, a communication circuit, a safety circuit, and other circuits), and the functions that the two can perform are the same. The first node can also wake up other nodes, and the second node can also be used as the object to be awakened. Preferably, when data transmission is not performed, the data link goes to sleep, the wake-up link maintains timing listening, and the data link wakes up when receiving signals transmitted by other nodes. It can be seen from the above description that using the dual wireless structure in the node to separately transmit the wake-up signal and the communication data can maximize the network security, reduce the power consumption of the WBAN network, and prolong the network life. Preferably, after the first node and the second node perform data transmission, the method further includes: the first node and the second node respectively update respective wakeup authentication codes and counters, wherein the counter is configured to generate a wakeup authentication code. In the preferred embodiment, the wake-up authentication code is updated in time after the data transmission is completed, thereby further ensuring network security. The embodiment of the invention further provides a data transmission device, which can be configured to implement the above data transmission method. 2 is a block diagram showing the structure of a data transmission apparatus according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes a receiving module 21, a comparison module 22, and a data transmission module 23. The structure is described in detail below. The receiving module 21 is configured to receive a wake-up message sent by another node, where the wake-up message carries a wake-up authentication code that matches a local wake-up authentication code of the node that needs to wake up currently; the comparing module 22 is coupled to the receiving module 21, and is set to compare The local wake-up authentication code and the wake-up authentication code received by the receiving module 21; the data transmission module 23 is coupled to the comparing module 22, and configured to perform data transmission with other nodes if the local wake-up authentication code matches the wake-up authentication code. Preferably, as shown in FIG. 3, the device further includes: an opening module 24, configured to enable a wake-up link by using an awake band, wherein the awake band is used to transmit a wake-up message; and the sending module 25 is coupled to the opening module 24, The wake-up link opened by the opening module 24 is sent to send a wake-up message to other nodes. The nodes interacting with the receiving module 21 and the sending module 25 in FIG. 3 may be the same node or different nodes. Preferably, the data transmission module 23 includes: an activation unit 232, configured to start a circuit required for data transmission by using a wake-up circuit, and open a data link through a data frequency band, where the data frequency band is used for transmitting communication data, and the circuit is When the data transmission is not in the sleep state, the power consumption of the wake-up circuit is lower than the power consumption of the circuit; the data transmission unit 234, coupled to the startup unit 232, is configured to perform data transmission with other nodes by using the digital link. Preferably, when data transmission is not performed, the data link goes to sleep, the wake-up link maintains timing listening, and the data link wakes up when receiving signals transmitted by other nodes. Preferably, as shown in FIG. 4, the apparatus further includes: an update module 26 coupled to the data transmission module 23, configured to update the local wakeup authentication code and the counter, wherein the counter is configured to generate the wakeup authentication code. Preferably, the above data transmission device is applied to a wireless body area network. The embodiment of the invention further provides a data transmission system, which is applied to a wireless body area network, the system comprises at least one node, wherein the node comprises any one of the above data transmission devices. It should be noted that the above-mentioned data transmission device corresponds to the above-mentioned data transmission method, and the specific implementation process has been described in detail in the method embodiment, and details are not described herein again. In order to make the technical solutions and implementation methods of the embodiments of the present invention clearer, the implementation process will be described in detail below in conjunction with the preferred embodiments. 5 is a schematic block diagram of a hardware circuit for data transmission according to a preferred embodiment of the present invention. As shown in FIG. 5, the WBAN network is divided into a central control node (ie, a body network controller in the body area network responsible for network control, referred to as BNC). And the sensor node (ie, the node Body Node in the body area network, referred to as BN for short). The link between the BNC and the BN maintains a dual radio link, for example, using the ISM band and the MICS band respectively, the ISM band 2.45 GHz is used to transmit the wake-up signal, and the MICS band is used to transmit the communication data, respectively using the wake-up link and The data link is maintained, using the wake-up circuit and the main circuit to transmit. The central control node includes a wake-up circuit (which may be a wake-up radio frequency transmitting circuit), a WBAN communication chip, and a processor. The sensor node includes a WBAN communication chip, a processor, and a battery. The central control node wakes up the sensor node through the wake-up circuit and the wake-up link, and transmits data through the data link and the awake sensor node. For demanding services (for example, setting blood pressure every 3 hours) and emergency services (for example, an old man falling or a sudden rise in blood pressure), the wake-up circuit allows the node's data link to go to sleep and keeps the timing of the wake-up link Listening, allowing the data link that is asleep to wake up through the transmission of signals from other nodes. The wakeup process is as follows:

(1) The central control node sends a wake-up command packet to the sensor node through the wake-up link and the wake-up frequency band (for example, the ISM band); (2) The sensor node compares the wake-up authentication code in the received wake-up command packet with the local wake-up authentication code. , to determine whether the two match;

(3) If it matches, the wake-up circuit in the sensor node starts the main circuit and turns on the data link through the data band (for example, MIPS band);

(4) Data transmission is performed between the central control node and the sensor node by using the data link; (5) After completing the data transmission task, the central control node and the sensor node update the wake-up authentication code and the counter, thereby further ensuring the security of the network. . 6 is a schematic diagram of a data transmission method according to a preferred embodiment of the present invention. As shown in FIG. 6, the WBAN network is divided into a central control node BNC and a sensor node BN. The central control node in the WBAN manages channel allocation and usage. The channel can be divided by a unit based on a time division multiple access (TDMA) based superframe. Each superframe includes a beacon, a Competitive Access Phase (CAP), a dedicated access phase EAP, and a Guard Time Slot (GTS)-based contention-free access phase CFP. These four parts. The link between the BNC and the BN maintains a dual radio link, for example, using the ISM band and the MICS band, respectively, where the ISM band is 2.45 GHz for transmitting wake-up signals, and the MICS band is for transmitting communication data, respectively for waking up links. And the data link is maintained, using the wake-up circuit and the main circuit to transmit. A unique data channel is assigned to each sensor node by the central control node. Each sensor node occupies a GTS protection slot in the superframe non-contention phase CFP by TDMA mode, and is set to perform general service transmission. For general service, the sensor node enters an active state based on the awake mode, accesses the channel, and waits for a beacon from the central control node. Since the central control node knows the awake mode of each sensor node, the central control node only sends beacons to the sensor nodes in the active state, and these beacons contain information such as synchronization, priority, channel, and time slot. For demand services and emergency services, the central control node assigns a wake-up channel to the sensor nodes. The wake-up circuit allows the node's data link to go to sleep and wake it up by signal transmission from other nodes. The wake-up signal is a low-power RF signal in the ISM band (2.4GHz band) and uses a wake-up authentication code (Wake Authentication Code, abbreviated as WAC) technology to ensure the security of wake-up. As shown in FIG. 6, the wake-up process is as follows: Step 1: The central control node sends a wake-up command packet to the wake-up link of the sensor node through the wake-up frequency band (for example, the ISM frequency band); Step 2, the sensor node checks the received wake-up command packet. Awakening the authentication code, and verifying whether the wake-up authentication code matches the local wake-up authentication code by designing a valid verification algorithm; Step 3, the wake-up circuit starts the main circuit and the data link, and sends the synchronization information in the wake-up link, and Align the frames of the data link to ensure that the wake-up authentication code between the sensor node and the central control node is synchronized; Step 4, data transmission through the data band (for example, MIPS band); Step 5, the central control node and the sensor node update wake-up authentication Code and counter. It should be noted that the steps shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and, although the logical order is shown in the flowchart, in some cases, The steps shown or described may be performed in an order different than that herein. In summary, according to the above embodiment of the present invention, the security setting using the wake-up authentication code not only avoids other users intentionally or unintentionally waking up the sensing nodes in the wireless body area network, thereby ensuring network security and avoiding The unnecessary energy consumption caused by the periodic wake-up of the sensing node reduces the network power consumption of the wireless body area network, thereby prolonging the network life. And the dual wireless structure is used in the node to separately transmit the wake-up signal and the communication data, which can ensure the network security to the greatest extent, reduce the power consumption of the WBAN network, and prolong the network life. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

1. A method of data transmission, comprising:

Receiving, by the first node, a wakeup message sent by the second node, where the wakeup message carries a wakeup authentication code that matches a local wakeup authentication code of a node that needs to wake up;

The first node compares its local wakeup authentication code with the wakeup authentication code;

If matched, the first node performs data transmission with the second node.

The method according to claim 1, wherein, before the first node receives the wake-up message sent by the second node, the method further includes:

The second node starts the wake-up link by using the wake-up frequency band, where the wake-up frequency band is used to transmit the wake-up message;

The second node sends the wake-up message to the first node by using the wake-up link.

3. The method according to claim 1, wherein the data transmission by the first node and the second node comprises: the first node needs to use a circuit to perform data transmission through a wake-up circuit, and pass data a frequency band is opened, wherein the data frequency band is used for transmitting communication data, the circuit is in a sleep state when data transmission is not performed, and power consumption of the wake-up circuit is lower than power consumption of the circuit; A node utilizes the digital link to perform data transmission with the second node.

4. The method according to claim 3, wherein, when no data transmission is performed, the data link enters sleep, the wake-up link maintains timing listening, and the data link wakes up when receiving signals transmitted by other nodes. .

The method according to claim 1, wherein after the first node performs data transmission with the second node, the method further includes: the first node and the second node respectively update respective Wake up the authentication code and the counter, wherein the counter is set to generate the wake-up authentication code.

The method according to any one of claims 1 to 5, wherein the data transmission method is applied to a wireless body area network.

7. A data transmission device comprising: a receiving module, configured to receive a wake-up message sent by another node, where the wake-up message carries a wake-up authentication code that matches a local wake-up authentication code of a node that needs to wake up currently; and a comparison module, configured to compare the local wake-up authentication code with The wake-up authentication code; the data transmission module is configured to perform data transmission with the other node if the local wake-up authentication code matches the wake-up authentication code.

The device according to claim 7, wherein the device further includes: an opening module, configured to enable a wake-up link by using an awake frequency band, where the awake frequency band is used to transmit the wake-up message;

And a sending module, configured to send the wake-up message to the other node by using the wake-up link.

9. The device according to claim 7, wherein the data transmission module comprises:

The startup unit is configured to start a circuit required for data transmission by the wake-up circuit, and open a data link through the data frequency band, wherein the data frequency band is used for transmitting communication data, and the circuit is in sleep when data transmission is not performed. a state, the power consumption of the wake-up circuit is lower than the power consumption of the circuit;

A data transmission unit is configured to perform data transmission with the other node using the digital link.

10. The apparatus according to claim 9, wherein, when no data transmission is performed, the data link enters sleep, the wake-up link maintains timing monitoring, and the data chain is received when receiving signals transmitted by the other node The road wakes up.

11. The apparatus according to claim 7, wherein the apparatus further comprises: an update module, configured to update a local wakeup authentication code and a counter, wherein the counter is configured to generate the wakeup authentication code.

The apparatus according to any one of claims 7 to 11, wherein the data transmission device is applied to a wireless body area network.

A data transmission system for a wireless body area network, comprising at least one node, wherein the node comprises the data transmission device of any one of claims 7 to 12.