136 results about "6LoWPAN" patented technology

A method is provided for registering a mobile router in an Internet Protocol version 6 over Low power Wireless Personal Area Network (6LoWPAN) network. The mobile router detects movement into a wireless network through the reception of a beacon message, and sends a Router Solicitation (RS) message requesting registration in the wireless network to a gateway. The gateway acquires an address of the mobile router from the RS message, stores the acquired address, assigns a new address to be used in the wireless network to the mobile router, and sends a Router Advertisement (RA) message with assigned address information and gateway address information, to the mobile router. The mobile router acquires the assigned address information and the gateway address information from the RA message.

The invention discloses an IPv6 over low power wireless personal area network (6LoWPAN) neighbor discovery-based tree routing method, which relates to the field of wireless sensor networks and comprises the following steps of: a, when a 6LoWPAN sensor node is added into the network, establishing a root node of tree topology, and configuring the basic information of the network to the root node; b, adding other ordinary nodes into the network; and c, forming routing. Moreover, the step c comprises the following steps of: under any one of the three conditions of leaf node invalidation or leaving, non-leaf node invalidation or leaving and node movement, triggering a routing restoring process; and under any one of the three conditions of no leaf node invalidation or leaving, no non-leaf node invalidation or leaving and no node movement, finishing the processing. In the 6LoWPAN neighbor discovery-based tree routing method, an additional routing protocol message is not required to be transmitted and received, so the bandwidth and the routing calculation overhead are reduced, energy consumption produced in the message transmission of the nodes is saved, and the energy consumption and routing overhead of the whole network are further reduced.

The invention discloses a 6LoWPAN smart home system and a method for achieving the same. The system comprises a USB embedded gateway, a plurality of bottom units communicating with the USB embedded gateway through a 6LoWPAN network and a control terminal communicating with the USB embedded gateway in a wired or wireless way. The USB embedded gateway receives data information from the bottom units and uploads the data information to the remote control terminal and receives control information of the remote control terminal and issues the control information to the corresponding bottom units to perform remote control. The communication protocol among the bottom devices, the USB embedded gateway and the remote control terminal is that the uploaded data frame format is divided into three classes: sensor alarm data frames, energy consumption data frames and control feedback data frames, and the issued data frame format is control data frames. The system is simple in structure, high in compatibility, convenient to use, low in cost and easy to extend.

The invention discloses a method for communicating a terminal of the internet of things with a host of the internet on the basis of IPv6 (internet protocol version 6). The method includes adding 6lowpan protocol into a protocol stack of the terminal of the internet of things to match data packets, namely supporting the network layer by the 6lowpan protocol and the IPv6 protocol; and utilizing 802.15.4 of IEEE (institute of electrical and electronic engineers) to perform data communication with a gateway on a link layer, realizing lightweight data packet transmission of the link layer in the lowpan area via the 802.15.4 protocol, utilizing the UDP (user datagram protocol) and the ICMP (internet control messages protocol) on a transmission layer of the terminal of the internet of things, and subjecting the gateway and the host of the internet to data communication via the Ethernet. A context active updating mechanism is realized in the terminal of the internet of things and is used for the process that the IPv6 host in the internet actively access to the terminal of the internet of things in the lowpan area, and meanwhile, the process of the terminal of the internet of things that data are actively reported to the host of the internet is provided, and the problem about mutual communication and connection between the terminal of the internet of things and the host of the internet is solved.

In one embodiment, a first node as a source node obtains personal area network identifiers of the first node and a second node respectively; and then fills the personal area network identifiers of the first node and the second node and 6LoWPAN-message-type information in a 6LoWPAN data packet and sends them to the edge router. After receiving the 6LoWPAN data packet, the edge router judges 6LoWPAN-message-type information of the data packet. When the 6LoWPAN-message-type information indicates that the data packet is sent to another 6LoWPAN subnet, the 6LoWPAN data packet is encapsulated in an IP data packet and sent to a backbone network router. The backbone network router and the edge router of the subnet in which the destination node is located, respectively route the data packet according to the personal area network identifier of the destination address.

The invention provides a two-channel data detection and protocol analysis meter based on 6LowPAN and a method and relates to the technical field of wireless sensor network. The analysis meter comprises a wireless data acquisition module, an upper computer decoding analysis part, a wireless RF (radio frequency) transceiver 1 and a wireless RF (radio frequency) transceiver 2. The method comprises the following steps: continuously monitoring if wireless data message exists in the channel; to the data message, packaging the message header and the channel signal by a main controller and sending to the upper computer; using an upper computer data processing module to confirm the frame type according to a frame type subsection in a frame control field of MAC (media access control) layer message header of the received data message; if being 6LowPAN packet, analyzing the protocol message header of the 6LowPAN packet layer by layer according to a protocol rule of a 6LowPAN protocol model; and performing analytic statistics and displaying on a man-machine interface.

The invention relates to a wireless heterogeneous network and a communication method for the same. A header conversion module is arranged in a coordinator of a Zigbee network, and is used for converting a header of a data packet for communication between different networks into a corresponding format; a 16-bit short address and extended unique identifier (EUI)-64 address mapping table is arranged in each of the coordinator of the Zigbee module and a border router of an Internet protocol version 6 over low-power and lossy network (6LoWPAN), and comprises a mapping relationship between 16-bit short addresses and EUI-64 addresses of intra-domain nodes and an address mapping relationship of extra-domain nodes. Each 6LoWPAN domain or Zigbee domain is set into an IPv6 multicast group to further prevent a broadcast storm. When a 6LoWPAN domain communicates with a Zigbee domain, the 6LoWPAN domain and the Zigbee domain share a group ID, and when the 6LoWPAN domain stops communicating with the Zigbee domain, sharing is canceled. A 6LoWPAN node and a Zigbee node can effectively communicate with each other under the condition of keeping the conventional protocols of the 6LoWPAN network and the Zigbee network unchanged, and the broadcast storm can be prevented.

The embodiment of the invention discloses an external communication method, device and system for a 6LoWPAN (internet protocol 6 over low power wireless personal area network) intra-network device and the outside. The method comprises: receiving a data packet sent by the intra-network device, wherein the header of the data packet carries a source address, a destination address and an external forwarding mark, the source address of a link layer header and the source address of an adaptation layer header are addresses of the intra-network device, and the destination address of the link layer header and the destination address of the adaptation layer header are addresses of a gateway device; acquiring the home address of the corresponding external network device; rewriting the destination address of the adaptation layer header of the data packet as the home address of the external network device, and packaging again; and transmitting the data packet after being packaged again to the external network device. The invention is suitable for compressing the header for the data packet when the intra-network device and external network device of the 6LoWPAN network communicate with each other.

The embodiment of the invention provides a safe 6LoWPAN communication method and system based on a block chain. The method comprises the following steps: constructing a plurality of 6LoWPAN boundary gateways into nodes on a block chain network; electing a master node, and taking the rest nodes as slave nodes; enabling the master node to package a transaction list, including transaction informationreflecting node operation conditions and / or security factors, of each node into a block, and enabling each node to verify and chain the legality of the block through a block consensus algorithm; andacquiring malicious nodes and cutting off an upper cloud channel in the verification process. According to the embodiment of the invention, a plurality of 6LoWPAN boundary gateways form a block chain;transaction lists are generated from transaction information reflecting node operation conditions and / or security factors and packaged into blocks, the blocks are chained through a block consensus algorithm, malicious nodes are confirmed in the block verification process, the security of the 6LoWPAN wireless sensor network is improved, and the 6LoWPAN communication method and system are convenient to trace afterwards.

The invention discloses a safety start method of a tree topology in an IPv6 over low power wireless personal area network (6LoWPAN), belonging to the filed of networks. The method comprises mutual authentication and trust assessment. Before node deployment, a network deployer allocates a unique identification (ID) and key for each node, so that mutual authentication can be achieved between two nodes if only the ID of the opposite party is known; and when a child node selects father nodes to access a network, trust assessment is carried out on the candidate father nodes, and a utility value method in a multi-target objective decision technology is utilized to comprehensively assess three indexes, namely the number of hops from the father node to a base station, consumed energy and time delay, so as to select an optimal father node. According to the method, node energy is saved, mutual authentication can be carried out by only IDs of the nodes and a small amount of information exchange but without the participation of a base station, and attack of malicious node can be resisted. Due to the introduction of trust assessment, the sideness solely depending on energy or hops is avoided, the energy consumption of the whole network is balanced, and the life of the network is prolonged, thus the method can be applied to scenes with small amount of node movement.

The invention discloses a service discovery method and device based on 6LoWPAN. The service discovery method and device based on the 6LoWPAN comprises an initialization step which includes that a host respectively completes route discovery and host address registration; a service registration step which includes that an SA (service agent) announces a service time which can be provided to a border router; service inquiry step which includes that a UA (user agent) seeks SA information which can provide services for the border router, the border route sends service inquiry response messages to the UA, and application interaction is performed between the SA and the UA. According to the service discovery method and device based on the 6LoWPAN, considering limits such as 6LoWPAN terminal memory capacity and energy consumption, an interactive mechanism is simplified as much as possible, service discovery messages are simplified to reduce loads of a data packet to be adapted to a low-bitrate wireless network of 802.15.4, resource overheads are small, and the mechanism is simple; a service discovery method is designed specially according to conditions of large numbers of application terminals and scalability of application functions of Internet of Things and advantages of high flexibility and strong scalability can be obtained.

The invention relates to an IPv6 (Internet protocol version 6) industrial wireless sensor network routing method based on definiteness scheduling and belongs to the technical field of industrial wireless sensor networks. The method is based on 6LoWPAN and definiteness scheduling of industrial wireless sensor networks, and adaptation layer protocol and neighbor discovery protocol are modified according to 6LoWPAN serial protocol standards. Scheduling time and channel quality are used as path selection standards according to application requirements of industrial wireless sensor networks. An optimal path simultaneously satisfying two routing standards is selected for data with marked definiteness features in a distributed manner, and accordingly definiteness, instantaneity and reliability requirements of industrial application are met. By the method, definiteness of an industrial wireless sensor network can be guaranteed effectively, and overall communication performance of the network is improved.

The invention discloses a distributed Web-based device and a method for testing the consistency of a 6LoWPAN protocol. The device comprises a central management server, Web testing servers, comprehensive testing instruments and auxiliary testing devices; a testing instruction is generated by an testing operator at a distant end via testing demands input by the Web testing server and combined with abstract testing sets, and meets the communication protocol of a wired network; and a device to be tested executes the testing instruction with the help of the virtual auxiliary testing devices and generates a testing report. According to the invention, protocol conversion from the wired network and the wireless network of the testing instruction is achieved, the testing operator can complete the test to the wireless network at the distant end via the wired network, and browses the test result via the wired network.

The invention discloses a LoWPAN (low-power wireless personal area network) node secure access control method based on neighbor discovery. The LoWPAN node secure access control method based on neighbor discovery solves the problem of communication security of 6LoWPAN (IPv6over LoWPAN) links. By means of optimization on RS (router solicitation) and RA (router advertisement) messages in a router discovery protocol, security authentication when new nodes are added into a network is achieved effectively, and whether the messages in the network are tampered or not is detected. By means of secure access control of a new node, an authentication address IP (internet protocol) list is maintained commonly within a network range, and attack and masking of malicious nodes can be prevented within the whole network range. The LoWPAN node secure access control method based on neighbor discovery has the advantages that the method is put forward based on an NDP (neighbor discovery protocol) of the 6LoWPAN, redefining new protocol types is not needed, and the method is higher in extendibility, easier to popularize and particularly applicable to sensor networks limited in resource energy.

The invention discloses an embedded internet of things gateway system. The system is respectively communicated and connected with a client and a boundary router, the client way is replaced by the Webwebpage way, the gateway comprises a MQTT message proxy server, a Web server, a database and a GPRS alarm module; the MQTT message proxy server is communicated and connected with the Web server; the Web server is communicated and connected with the database and the GPRS alarm module; the embedded equipment sends short message information through the GPRS alarm module, performs information interaction with a browser of the client through the Web server, and performs information interaction with the boundary router through the MQTT message proxy server. The system has the advantage that a user can immediately acquires the environment parameter data of each sensor node in the 6LoWPAN wireless sensor network by using the browser in the webpage way, the tediousness of developing corresponding client software on the PC or smart phone and different smart platforms, the development cost and the maintenance cost are reduced; and the embedded equipment is used as the running environment, and thehardware cost is reduced.

The present invention relates to a 6LoWPAN network intrusion detection method based on an improved KNN, belonging to the technical field of wireless communication. The quantization safety features (namely network element features) capable of reflecting the safety state of a 6LoWPAN network element itself are selected for training so that a 6LoWPAN network feature space is established. The presentinvention provides an obtaining mode and a processing mode of the network element feature data for weight distribution for the features and zero point transfer processing so as to relieve the bias caused by large and smaller influence factors (namely values after feature quantization) and achieve simplification calculation; the network element feature data is extracted in real time to achieve construction and update of a network element state data table so as to form a normal outline updated according to the network real-time state in the 6LoWPAN network feature space based on the clustering effect of the KNN algorithm; and moreover, the KNN algorithm is improved and the basis for determining the intrusion is redefined to adapt the requirements of the 6LoWPAN network intrusion detection.

The invention provides a 6LoWPAN-based nested mobile network routing optimization method. A 6LoWPAN network consists of more than one personal area network which comprises an access node and more than one mobile network comprising one mobile router and more than one mobile network node, wherein the access node and the mobile router are formed in a tree structure; and the mobile router realizes routing through the tree structure automatically. In the invention, the mobile network node can communicate with a communication node without the home proxy of the mobile router of the mobile network and without establishing a channel, the mobile network node can judge if a target communication node is in the same 6LoWPAN network as the mobile network node accurately according to the IPv6 address of the communication node, and thus, an optimal routing path to the target communication node is established and data transmission delay is shortened.

The invention discloses a redundancy method of an IPv6 router suitable for a tree type wireless sensor network, and belongs to the technical field of the wireless sensor network. Based on 6LoWPAN and the tree type routing technology of the wireless sensor network, an IPv6 neighbor discovery protocol is modified according to the 6LoWPAN series protocol standard. The router establishes a self redundancy router from a neighboring router by combining the characteristic of dense deployment of nodes of the industrial wireless sensor network, and when the router does not work, the redundancy router acts on behalf the router transparently to carry out data routing forwarding work. Meanwhile, when the router out of operation recovers a normal working state, the redundancy router automatically stops the proxy work. The redundancy method of the IPv6 router suitable for the tree type wireless sensor network can effectively solve the problem that descendant nodes can not communicate due to failure of the router in the tree type network, thereby realizing the IPv6 wireless sensor network routing technology simultaneously meeting the requirements for reliability, real time performance and small expenditure of industrial application, and improving the overall reliable communication capacity of the network.

The invention discloses a 6LoWPAN-based intelligent fire-fighting service system for colleges and universities and a design method of the 6LoWPAN-based intelligent fire-fighting service system. The service system comprises a data acquisition layer, a data transmission layer, a data control layer and a system application layer, good interoperability of the 6LoWPAN can solve information isolation, the 6LoWPAN supports the intercommunication with other IEEE (Institute of Electrical and Electronic Engineers) 802.15. 4 equipment and supports the interconnection with other IP networks; through designing a data control layer based on fire-fighting big data, intelligentized analysis of data, intelligent control on fire-fighting equipment, a visual service platform is established; through analyzingand mining fire-fighting big data, the fire situation is predicted and a solution is formulated, the fire prevention and control efficiency is improved, the intelligence of a service platform is realized, the purposes of equipment management centralization, fire-fighting construction underlying data management intellectualization and management system platformization are achieved, and the systemhas the characteristics of high feasibility, convenience in networking and easiness in maintenance and upgrading.

The invention relates to an IPv6 wireless sensor network multipath transmission method based on an RPL routing protocol and belongs to the technical field of a wireless sensor network. According to the method, in a 6LoWPAN wireless sensor network based on an IPv6 technology, through utilization of the RPL protocol, a father node set generated when routing is carried out is established according to a hop count value from a source node to a sink node and node residual energy, a message is copied to obtain multiple copies according to a reliability demand of a message and a Rank value of the father nodes, and the message copies are distributed to a plurality of RPL father nodes for forwarding. According to the method, in order to enable the 6LoWPAN wireless sensor network to support multipath message transmission, a new 6LoWPAN head--a multipath head is designed in an adaption layer, and the multipath head is used for copying the message to multipath transmission and finally eliminating the message. According to the method, through increase of redundant paths when the message is transmitted, the message transmission reliability in the network can be improved; and when transmission paths are selected, the node residual energy and the hop count from the source node to the sink node are taken into consideration, so the life time of the network can be effectively prolonged.

The invention discloses a 6LoWPAN (IPv6 over Low power Wireless Personal Area Network)-based network connection method. The 6LoWPAN-based network connection method comprises the following steps: on the basis of LwIP, establishing a 6LoWPAN+RPL protocol stack model including an application layer, a transmission layer, an IP layer and a physical layer; and increasing a 6LoWPAN adaptation layer between the IP layer and the physical layer to complete MAC management, and frame compression, frame fragmentation and frame recombination of 6LoWPAN. The invention also discloses a 6LoWPAN-based network connection system. The 6LoWPAN-based network connection method establishes the 6LoWPAN+RPL protocol stack model including the application layer, the transmission layer, the IP layer and the physical layer on the basis of LwIP, and increases the 6LoWPAN adaptation layer between the IP layer and the physical layer to enable nodes and gateways to have higher communication efficiency. And the 6LoWPAN-based network connection method supports fragmentation and recombination of MAC data frames, and can send data with random lengths.

The invention provides an IPv6-based wireless sensor network and Internet multi-gateway interconnection scheme. An IPv6 wireless sensor network complies with a 6LoWPAN (IPv6 over Low power Wireless Personal Area Networks) standard. The IPv6-based wireless sensor network and Internet multi-gateway interconnection scheme comprises the steps that a root-LBR serving as a root gateway and a plurality of LBRs serving as ordinary gateways are introduced in existing 6LoWPAN, and an IP internetwork route with an extended RPL routing algorithm is adopted in the 6LoWPAN, an IP tunnel scheme is adopted between the root-LBR and the LBRs to achieve IP wired high-speed communication between the root-LBR and the LBRs, and then network interconnection and routing between the IPv6 wireless sensor network and the Internet of the former level are conducted through the root-LBR in a unified mode. According to the IPv6-based wireless sensor network and Internet multi-gateway interconnection scheme, the power consumption of a wireless IP gateway is reduced, nodes of the wireless gateway achieve load sharing, the network lifetime is prolonged, the capacity of internetwork connection is improved, and interconnection delay is reduced.

The invention provides a building energy-saving monitoring system and monitoring method based on a 6LowPAN technology and cloud service. The monitoring system comprises a wireless node control module, a 6LowPAN communication module, a cloud server and a terminal, wherein the wireless node control module comprises a control main body, a wireless module, a collecting module and a control module, the wireless module, the collecting module and the control module are respectively and electrically connected with the control main body, the control main body receives wireless node state data collected by the collecting module and outputs the wireless node state data through the wireless module, or a control instruction is obtained through the wireless module, and in addition, the control instruction is converted into a control strategy and is then transmitted to the control module controlling the wireless node state. The 6LowPAN communication module comprises a 6LowPAN network and a 6LowPAN network coordinator. The cloud server and the 6LowPAN network coordinator carry out data exchange through Ethernet. The terminal accesses the cloud server through the Ethernet.

The invention provides an emergency communication command, positioning and sensing system. The system comprises communication base stations, wireless communication terminals, wireless sensors, positioning tags and a server. The communication base stations and the wireless sensors provide wireless grid network networking and signal coverage for the system. A broad-band wireless local area network is formed among the communication base stations and broad-band wireless access is provided. A narrowband sensing network is formed among the wireless sensors and narrow-band wireless access is provided. IPV6 / 6Lowpan protocol networking is used between the communication base stations and the wireless sensors. The server is connected with any one communication base station. Each wireless communication terminal accesses the communication base stations through the broad-band wireless local area network. Each positioning tag communicates with the communication base stations or the wireless sensors through the narrowband sensing network. The server issues monitoring information to the wireless sensors and the positioning tags through the communication base stations. By using the emergency communication command, positioning and sensing system provided in the invention, a narrow-band low-power-consumption advantage and a broad-band wireless communication capability of a sensing network are possessed simultaneously.

The invention provides a 6LoWPAN (6Low-power Wireless Personal Area Network)-based energy-saving data transmission method for a wireless sensor network. An optimal TAN (Temporary Assembling Node) needs to be found between an information source and an information sink; firstly, the information source divides an IPv6 (Internet Protocol Version 6) into fragmentations, then transmits the fragmentations to the TAN one by one through a method of MUR, namely Mesh-under Routing, of the 6LoWPAN protocol; and the TAN assembles together the received fragmentations to the original IPv6 data packet, then fragments the IPv6 data packet, and transmits the fragmentations to the information sink node one by one through the MUR. Therefore the total energy consumption of the node transmitting data packet is reduced. The method of finding the TAN is the key of the invention, and the core of the invention is formula (19). By adopting the method provided by the invention, the energy consumption of the node transmitting data packet, the retransmission times of the data packet and the communication delay-time in the wireless sensor network are all reduced.

The invention discloses an intelligent 6LoWPAN boundary route implementation method and a boundary router. The method comprises the following steps: A, enabling an LAN port to bear a 6LoWPAN radio frequency network and to initiate a networking command, and carrying out the networking with a 6LoWPAN terminal node; B, operating an Internet protocol, corresponding to type of a public network, at a WAN port according to the type of the public network access to the WAN port; C, carrying out the corresponding protocol conversion or packaging processing of an IP message according to the type of the public network access to the WAN port during the forwarding of the IP message transmitted by the 6LoWPAN terminal node to a remote server, and transmitting the IP message after processing to the remote server. According to the invention, the method combines with a WAN port IPv4 / IPv6 dual stack and an IPv6 transition module for design, is large in address space, and can meet the demands of the deployment of a large number of terminal devices.

The invention relates to the network technology. In order to support moving of a mobile subnet of a small scale or a medium scale, the technical scheme includes that a network mobility management method of an internet protocol version 6 over low power wireless personal area network (6LoWPAN) includes the following steps that: (1) an entity (an agent mobile router) is disposed on a router position on the network edge of the 6LoWPAN; (2) a mobile access anchor point entity is added in a communication frame; (3) a mobile network moves to a new 6LoWPAN domain and then registers an obtained new care-of address, a home address and a network prefix with a private mobile radio (PMR); (4) the PMR sends an own care-of address and associated information of the network prefix of the mobile network to a domain name server (DNS) of a home domain where the mobile network is located, and sends the associated information to a home agent of the mobile network; and (5) a mobile network node and an objective communication node transmit data through transshipment of the PMR of a foreign domain where the mobile network is located, and achieve mutual two way communications. The network mobility management method of the 6LoWPAN is mainly used for network communications.

The invention discloses a protocol consistency test instrument of an internet protocol version-6 (IPv6) over low-power wireless personal area network (LoWPAN). The instrument comprises a main control module, a protocol stack module and a radio frequency module, wherein the main control module comprises a test sub-module, a system integration sub-module and a human-computer interface sub-module; the protocol stack module is in communication connection with the main control module and the radio frequency module and used for providing protocol support for communication of the protocol consistency test instrument; and the radio frequency module comprises a radio frequency transmission sub-module and a radio frequency receiving sub-module. By adoption of the protocol consistency test instrument of the 6LoWPAN provided by the invention, the protocol consistency of the 6LoWPAN can be tested. Moreover, the radio frequency module is applicable to the protocol consistency test instrument of the 6LoWPAN, all frequency coverage ranges can be supported, and the advantage of cost performance of a desk type personal computer (PC) is perfectly combined with the necessary expansion of a peripheral component interconnect (PCI) bus in the field of instruments, so that the development cost of the instrument is reduced, and the performance of the instrument is improved.

The invention provides a realization method of a 6LoWPAN (IPv6 over Low power Wireless Personal Area Network) wireless sensor network system. The system comprises four sensor nodes: a new node, access nodes, cluster head nodes and cluster nodes, wherein the cluster head nodes comprise fixed cluster head nodes and a mobile cluster head node; the access nodes and the fixed cluster head nodes have routing and forwarding functions; and one access node and more than one fixed cluster head nodes form a tree structure to form a routing backbone network of a 6LoWPAN wireless sensor network. The cluster nodes are used for collecting data, and the data is routed through the tree structures formed by the access nodes and the fixed cluster head nodes. A cluster comprises one cluster head node and a plurality of cluster nodes, and the cluster nodes are in the jump range of the cluster head node. A topological structure takes the shape of a star. The fixed cluster head nodes or the access nodes are used for distributing IPv6 addresses for other cluster head nodes, and the cluster nodes obtain the IPv6 addresses from the cluster head nodes.

The embodiment of the invention discloses a method and a system for compressing an external IPv6 (Internet protocol version 6) address for passing in and out of Internet of things, wherein the method comprises the steps of generating an external IPv6 address compressed mapping table in advance by a 6Lowpan gateway, and distributing specific compressed items in the external IPv6 address compressed mapping table to corresponding 6Lowpan nodes by the 6Lowpan gateway, wherein the external IPv6 address compressed mapping table comprises more than one compression; for an inbound message from external IPv6 nodes to the 6Lowpan nodes, using the 6Lowpan gateway to inquire the compressed item corresponding to a source IPv6 address in the inbound message in the external IPv6 address compressed mapping table, and compressing the source IPv6 address according to the compressed item; for an outbound message from the 6Lowpan nodes to the external IPv6 nodes, compressing the target IPv6 address included in the outbound message by the 6Lowpan nodes according to the compressed item which is distributed by the 6Lowpan gateway and corresponds to the target IPv6 address in the outbound message. The method and the system can be used for compressing and optimizing the external IPv6 address for passing in and out of the Internet of things through the 6Lowpan gateway.