WO2018232963A1 - 一种边缘转发节点的路由信息表更新方法及边缘转发节点 - Google Patents
一种边缘转发节点的路由信息表更新方法及边缘转发节点 Download PDFInfo
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- WO2018232963A1 WO2018232963A1 PCT/CN2017/098499 CN2017098499W WO2018232963A1 WO 2018232963 A1 WO2018232963 A1 WO 2018232963A1 CN 2017098499 W CN2017098499 W CN 2017098499W WO 2018232963 A1 WO2018232963 A1 WO 2018232963A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/025—Services making use of location information using location based information parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
- H04W40/248—Connectivity information update
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- the present invention relates to the field of Internet of Things technologies, and in particular, to a method for updating a routing information table of an edge forwarding node and an edge forwarding node.
- the terminal device in the IoT architecture can collect the corresponding IoT data and report it to the aggregation unit acting as the human-machine human-machine interface through the forwarding node, so that the aggregation unit can analyze and make decisions directly.
- the forwarding node that listens to the IoT data reported by the terminal device is called an edge forwarding node.
- the edge forwarding node stores the routing information table and needs related information (such as device identifier and device address) of the newly added terminal device in its wireless coverage. Etc.) Update to the routing information table to add new terminal devices to the IoT architecture. However, whenever a terminal device is added to the wireless coverage of the edge forwarding node, the edge forwarding node needs to update the routing information table according to the newly added terminal device, which causes a problem that the routing information table is updated frequently.
- the embodiment of the invention discloses a method for updating a routing information table of an edge forwarding node and an edge forwarding node, which can update the routing information table of the edge forwarding node according to the actual needs of the aggregation unit, thereby reducing the number of updates of the routing information table.
- the first aspect of the embodiment of the present invention discloses a method for updating a routing information table of an edge forwarding node, where the method includes:
- the edge forwarding node receives the interest indication message sent by the filtering gateway, where the interest indication message is used to indicate that the aggregation unit is interested in the Internet of Things data reported by the terminal device in the target geographic location;
- the edge forwarding node listens to the Internet of Things data reported by a plurality of terminal devices in the wireless coverage area, where the Internet of Things data includes the data content, the device identifier of the terminal device that reports the Internet of Things data, and the geographic location of the terminal device. position;
- the edge forwarding node determines whether the device identifiers are not stored in the pre-generated routes in the plurality of terminal devices. At least one terminal device in the information table, when judging the plurality of terminal devices When the at least one terminal device exists, the device identifier of each of the at least one terminal device is added to the routing information table.
- the method further includes:
- the edge forwarding node determines whether there is an offline device identifier of the terminal device in the routing information table, and when it is determined that the device identifier of the offline terminal device exists, deleting the offline terminal from the routing information table.
- the method further includes:
- the edge forwarding node determines whether there is a passing terminal device in the at least one terminal device, and when it is determined that the passing terminal device does not exist in the at least one terminal device, triggering execution of the at least one terminal
- the device identifier of each terminal device in the device is added to the operation in the routing information table;
- the method further includes:
- the edge forwarding node When it is determined that the passing terminal device exists in the at least one terminal device, the edge forwarding node adds a device identifier of the terminal device other than the passing terminal device in the at least one terminal device to the In the routing information table.
- the method further includes:
- the edge forwarding node counts the reporting frequency of the Internet of Things data reported by the target terminal device in the geographic location of all the terminal devices corresponding to the device identifiers in the routing information table, and reports the target Internet device to the target
- the terminal device that reports the frequency lower than the preset reporting frequency threshold in the terminal device sends a reporting frequency upward adjustment command.
- the method further includes:
- the edge forwarding node sets, in the routing information table, a reporting priority for the device identifier of the terminal device whose frequency is lower than the preset reporting frequency threshold in the target terminal device, where the reporting frequency is smaller, The higher the priority of the escalation.
- the second aspect of the embodiment of the present invention discloses an edge forwarding node, where the edge forwarding node includes a receiving unit, a listening unit, a determining unit, and an adding unit, where:
- the receiving unit is configured to receive an interest indication message sent by the filtering gateway, where the interest indication message is Used to indicate that the aggregation unit is interested in the Internet of Things data reported by the terminal device in the target geographical location;
- the listening unit is configured to listen to the Internet of Things data reported by a plurality of terminal devices in the wireless coverage area, where the Internet of Things data includes data content, a device identifier of the terminal device that reports the Internet of Things data, and the terminal device Geographic location
- the determining unit is configured to determine, when the plurality of terminal devices in the plurality of terminal devices that the geographical location is the target geographic location, whether the device identifier is not stored in the pre-generated At least one terminal device in the routing information table;
- the adding unit configured to: when the determining unit determines that the at least one terminal device exists in the multiple terminal devices, add a device identifier of each terminal device in the at least one terminal device to the route In the information form.
- the determining unit is further configured to determine whether the device identifier of the offline terminal device exists in the routing information table, and the offline terminal device a terminal device that does not report the Internet of Things data to the edge forwarding node within a preset time period;
- the edge forwarding node further includes a deleting unit, where:
- the deleting unit is configured to: when the determining unit determines that the device identifier of the offline terminal device exists, delete the device identifier of the offline terminal device from the routing information table.
- the determining unit is further configured to: after determining that the at least one terminal device exists in the multiple terminal devices, and in the adding And determining, by the unit, the device identifier of each terminal device in the at least one terminal device, before determining, in the routing information table, whether the at least one terminal device has a passing terminal device, and when the at least one terminal device is determined When the passing terminal device does not exist, the adding unit is triggered to perform the operation of adding the device identifier of each terminal device in the at least one terminal device to the routing information table;
- the adding unit is further configured to: when the determining unit determines that the passing terminal device exists in the at least one terminal device, the terminal of the at least one terminal device except the passing terminal device The device identifier of the device is added to the routing information table.
- the edge forwarding node further includes a statistics unit and a sending unit, where:
- the statistic unit is configured to collect, by the target terminal device, the target terminal device in the location information of all the terminal devices corresponding to the device identifier stored in the routing information table, and report the object network data Reporting frequency;
- the sending unit is configured to send a reporting frequency upward adjustment instruction to a terminal device that reports a frequency lower than a preset reporting frequency threshold in the target terminal device.
- the edge forwarding node further includes a setting unit, where:
- the setting unit is configured to set a reporting priority for the device identifier of the terminal device whose frequency is lower than the preset reporting frequency threshold in the target terminal device, where the reporting frequency is higher. Small, the set report priority is greater.
- the embodiment of the invention has the following beneficial effects:
- the edge forwarding node receives the interest indication message sent by the filtering gateway, where the interest indication message is used to indicate that the aggregation unit is interested in the Internet of Things data reported by the terminal device in the target geographical location, and listens to the wireless device.
- the Internet of Things data reported by a large number of terminal devices in the coverage area includes data content, a device identifier of the terminal device that reports the Internet of Things data, and a geographical location of the terminal device, where the large number of terminal devices exist
- the edge forwarding node determines whether the device identifier is not stored in the pre-generated routing information table, and determines that the multiple
- the device identifier of each terminal device in the at least one terminal device is added to the routing information table.
- the embodiment of the present invention can update the device identifier of the terminal device of the geographic location that is added to the geographical location of the aggregation unit to the routing information table of the edge forwarding node according to the actual requirement of the convergence unit, thereby reducing the routing information.
- the number of updates to the table which in turn reduces the power consumption of the edge forwarding node.
- FIG. 1 is a schematic diagram of an Internet of Things architecture disclosed in an embodiment of the present invention.
- FIG. 2 is a schematic flowchart of a method for updating a routing information table of an edge forwarding node according to an embodiment of the present invention
- FIG. 3 is a schematic flowchart of a method for updating a routing information table of another edge forwarding node according to an embodiment of the present invention
- FIG. 4 is a schematic structural diagram of an edge forwarding node according to an embodiment of the present invention.
- FIG. 5 is a schematic structural diagram of another edge forwarding node according to an embodiment of the present disclosure.
- FIG. 6 is a schematic structural diagram of still another edge forwarding node according to an embodiment of the present invention.
- the embodiment of the invention discloses a method for updating a routing information table of an edge forwarding node and an edge forwarding node, which can add a new location and a geographical location of the terminal device of interest to the aggregation unit according to the actual needs of the convergence unit.
- the device identifier is updated to the routing information table of the edge forwarding node, which reduces the number of updates of the routing information table, thereby reducing the power consumption of the edge forwarding node.
- FIG. 1 is a schematic diagram of an Internet of Things architecture disclosed in an embodiment of the present invention.
- the IoT architecture may include three layers: a terminal device layer, a forwarding node layer, and an aggregation layer according to functions.
- the terminal device layer may include a mass-scale terminal device, such as a hygrometer, a smoke sensor, a ventilation device, a rain sensor, an irrigation valve, etc.;
- the forwarding node layer may include a large number of forwarding nodes connected by a network, and the forwarding node may include a router.
- the device, the repeater, the access point, and the like are not limited in the embodiment of the present invention, and in the forwarding node layer, the forwarding node capable of directly listening to the Internet of Things data reported by the terminal device in the terminal device layer may also be called an edge forwarding node.
- the forwarding node can use any standard networking protocol, and the forwarding node can implement data parsing between different network standards;
- the aggregation layer can include a filtering gateway and a convergence unit, wherein the filtering gateway can communicate with each other through the Internet and the forwarding node layer.
- the forwarding node directly or introduces the communication connection; the aggregation unit can perform high-level management on each forwarding node of the forwarding node layer through the filtering gateway, thereby realizing the control of the data transmission frequency, the network topology, and other networking functions; the aggregation unit can not only the massive terminal device Internet of Things According to the analysis and decision-making, it is also possible to obtain information or configure terminal device parameters by sending instructions (at this time, the data transmission is directed to the terminal device); the aggregation unit can also introduce various services, from big data to social networks, and even from social tools. "point Like to weather sharing, etc.
- each forwarding node can provide IoT data receiving and receiving services for massive terminal devices within its own wireless coverage, where each forwarding node has its own wireless coverage.
- Each terminal device in the range can have a built-in wireless communication module, which enables each forwarding node to wirelessly communicate with each terminal device within its own wireless coverage by wireless network communication.
- the wireless communication module built in the terminal device can input the upper frequency point 470MHz and the lower frequency point 510MHz, so that the wireless communication module can automatically define the communication frequency band as 470MHz ⁇ 510MHz to meet the requirements of the Chinese SRRC standard; or It is also possible to input the upper frequency point of 868MHz and the lower frequency point of 908MHz, so that the wireless communication module can automatically define the communication frequency band as 868MHz to 908MHz to meet the requirements of the European ETSI standard; or, the upper frequency point can be input to 918MHz and the lower frequency point is 928MHz.
- the wireless communication module can automatically define the communication frequency band as 918MHz to 928MHz, In accordance with the provisions of the FCC standard of the United States; or, the communication frequency band of the wireless communication module can also be defined as complying with the Japanese ARIB standard or the Canadian IC standard, which is not limited by the embodiment of the present invention.
- the terminal device It can be combined with Frequency Division Multiple Access (FDMA), Frequency-Hopping Spread Spectrum (FHSS), Dynamic Time Division Multiple Access (DTDMA), and Backtracking Multiplexing (CSMA). The method to solve the interference problem.
- FDMA Frequency Division Multiple Access
- FHSS Frequency-Hopping Spread Spectrum
- DTDMA Dynamic Time Division Multiple Access
- CSMA Backtracking Multiplexing
- FIG. 2 is a schematic flowchart of a method for updating a routing information table of an edge forwarding node according to an embodiment of the present invention.
- the routing information table update method of the edge forwarding node may include the following operations:
- the edge forwarding node receives the interest indication message sent by the filtering gateway, where the interest indication message is used to indicate that the aggregation unit is interested in the Internet of Things data reported by the terminal device in the target geographic location.
- the target geographic location may be a certain farm, a certain city, a certain factory, or a certain school, etc., which is not limited by the embodiment of the present invention.
- the edge forwarding node receiving the interest indication message sent by the filtering gateway may include:
- the edge forwarding node sends a first interest request including the node identifier of the edge forwarding node to the filtering gateway, to trigger the filtering gateway to determine, according to the node identifier included in the first interest request, whether the edge forwarding node is an authorized edge forwarding node and is determining
- the second interest request including the node identifier of the edge forwarding node and the gateway identifier of the filtering gateway is sent to the aggregation unit, where the first interest is requested And requesting the second interest request for requesting the aggregation unit to indicate the Internet of Things data of interest, wherein, after the convergence unit receives the second interest request, the node identifier and the gateway included by the convergence unit according to the second interest request Identifying an identity forwarding message to the edge forwarding node and the filtering gateway, and returning an interest indication message to the filtering gateway when the identity authentication passes;
- the edge forwarding node receives the interest indication message delivered by the filtering gateway.
- the sending, by the edge forwarding node, the first interest request that includes the node identifier of the edge forwarding node to the filtering gateway may include:
- the edge forwarding node detects the load value of the wireless port between the interface and the filtering gateway, and determines whether the load value is less than the specified load threshold. If the load threshold is less than the specified load threshold, the node identifier including the edge forwarding node is sent to the filtering gateway through the wireless port.
- the first interest request which can improve the reliability of the edge forwarding node successfully sending the first interest request.
- the edge forwarding node listens to the Internet of Things data reported by a plurality of terminal devices in the wireless coverage area, where the Internet of Things data includes the data content, the device identifier of the terminal device that reports the Internet of Things data, and the geographical location of the terminal device. .
- the Internet of Things data detected by the edge forwarding node is reported by the terminal device in the wireless coverage area by using a local wireless device such as Wi-Fi, Bluetooth, or infrared.
- the edge forwarding node determines whether the device identifiers in the plurality of terminal devices are not stored in the pre-generated routing information table. At least one of the terminal devices, when the determination result of step 203 is YES, triggers execution of step 204. When the determination result of step 203 is negative, the current flow may be ended, that is, the routing information table of the edge forwarding node is not updated.
- the routing information table stores the device identifier of the terminal device in the wireless coverage of the edge forwarding node.
- the edge forwarding node adds the device identifier of each terminal device in the at least one terminal device to the routing information table.
- routing information table updating method of the edge forwarding node may further include the following operations:
- the edge forwarding node determines whether the device identifier of the offline terminal device exists in the routing information table, and when it is determined that the device identifier of the offline terminal device exists, the device identifier of the offline terminal device is deleted from the routing information table, where, offline The terminal device is not forwarding the node to the edge within a preset time period.
- the terminal device that reports the Internet of Things data, and the offline terminal device may include the terminal device that has been damaged and/or the terminal device that has been in the long-time off state and the terminal device that has been added to the routing information table of the adjacent forwarding node. .
- the optional embodiment can delete the device identifier of the terminal device that has been offline from the routing information table in time, which is beneficial to the instant update of the Internet of Things topology in the Internet of Things architecture.
- the edge forwarding node may further encapsulate the above-mentioned Internet of Things data that is detected by the edge forwarding node into data elements and The data element is sent to the next hop forwarding node of the edge forwarding node, or the edge forwarding node may also encapsulate the Internet of Things data of the geographical location included in the IoT data that is detected by the interception into the data.
- the edge forwarding node may directly
- the embodiment of the present invention is not limited by the filtering of the Internet of Things data reported by the foregoing plurality of terminal devices.
- the routing information table updating method of the edge forwarding node described in FIG. 2 can update the device identifier of the terminal device that is newly added and the geographical location is the geographical location of interest to the aggregation unit according to the actual needs of the aggregation unit.
- the routing information table of the edge forwarding node reduces the number of updates of the routing information table, thereby reducing the power consumption of the edge forwarding node.
- FIG. 3 is a schematic flowchart diagram of another method for updating a routing information table of an edge forwarding node according to an embodiment of the present invention.
- the routing information table update method of the edge forwarding node may include the following operations:
- the edge forwarding node receives the interest indication message sent by the filtering gateway, where the interest indication message is used to indicate that the aggregation unit is interested in the Internet of Things data reported by the terminal device in the target geographic location.
- the edge forwarding node listens to the Internet of Things data reported by a plurality of terminal devices in the wireless coverage area, where the Internet of Things data includes the data content, the device identifier of the terminal device that reports the Internet of Things data, and the geographical location of the terminal device. .
- the edge forwarding node determines whether the device identifiers in the plurality of terminal devices are not stored in the pre-generated routing information table. At least one of the terminal devices, when the determination result of step 303 is YES, triggering execution of step 304, and when the determination result of step 303 is negative, the flow may be ended, that is, incorrect The routing information table of the edge forwarding node is updated.
- the edge forwarding node determines whether there is a passing terminal device in the at least one terminal device. When the determination result in step 304 is no, the step 305 is triggered. When the determination result in step 304 is YES, step 306 is triggered.
- the determining, by the edge forwarding node, whether the terminal device that passes through the at least one terminal device may include:
- the edge forwarding node sends a query request to the neighboring forwarding node in the wireless coverage area, where the query request is used to request the neighboring forwarding node to query whether the routing information table stored by the neighboring forwarding node stores one of the at least one terminal device.
- Device identification of the terminal device
- the edge forwarding node receives the query response returned by the neighboring forwarding node, and determines, when one of the query responses indicates that the device identifier of one of the at least one terminal device is stored in the routing information table stored by the corresponding neighboring forwarding node.
- the at least one terminal device has a passing terminal device, and when any one of the query responses indicates that the device identifier of any one of the at least one terminal device is not stored in the routing information table stored by the corresponding neighboring forwarding node, determining the foregoing There is no passing terminal device in at least one terminal device.
- the edge forwarding node adds the device identifier of each terminal device in the at least one terminal device to the routing information table.
- the edge forwarding node adds, to the routing information table, the device identifier of the terminal device except the terminal device that is at least one terminal device.
- routing information table updating method of the edge forwarding node may further include the following operations:
- the edge forwarding node determines whether the device identifier of the offline terminal device exists in the routing information table, and when it is determined that the device identifier of the offline terminal device exists, the device identifier of the offline terminal device is deleted from the routing information table, where, offline
- the terminal device is a terminal device that does not report the Internet of Things data to the edge forwarding node within a preset time period, and the offline terminal device may include the terminal device that has been damaged and/or the terminal device that has been in the long-term shutdown state and/or The device identifier has been added to the terminal device of the routing information table of the neighboring forwarding node.
- the optional embodiment can delete the device identifier of the terminal device that has been offline from the routing information table in time, which is beneficial to the instant update of the Internet of Things topology in the Internet of Things architecture.
- the routing information table update method of the edge forwarding node may also include Including the following operations:
- the edge forwarding node counts the reporting frequency of the object network data reported by the target terminal device in the geographic location of the terminal device corresponding to the device identifier in the routing information table, and reports the frequency to the target terminal device.
- the terminal device lower than the preset reporting frequency threshold sends a reporting frequency up-regulation command. This can improve the reliability of the Internet of Things data reported by the terminal device that the aggregation unit receives the geographic location of interest.
- routing information table updating method of the edge forwarding node may further include the following operations:
- the edge forwarding node sets, in the foregoing routing information table, a reporting priority for the device identifier of the terminal device whose reporting frequency is lower than the preset reporting frequency threshold in the target terminal device, where the reporting frequency is smaller, the set reporting priority is set.
- the bigger In this way, when receiving the Internet of Things data reported by the terminal device with a lower reporting frequency, the part of the Internet of Things data can be preferentially reported according to the priority set for the Internet of Things data, or the forwarding path with higher reliability can be selected preferentially for the part of the Internet of Things data. Further, the reliability of the IoT data reported by the aggregation unit to the terminal device that is interested in and reported by the aggregation unit is further improved.
- the routing information table updating method of the edge forwarding node described in FIG. 3 can update the device identifier of the terminal device that is newly added and the geographical location is the geographical location of interest to the aggregation unit according to the actual needs of the aggregation unit.
- the routing information table of the edge forwarding node reduces the number of updates of the routing information table, thereby reducing the power consumption of the edge forwarding node, facilitating the maintenance of the network topology in the Internet of Things architecture, and adding and
- the temporarily passing terminal device is automatically filtered, which can further reduce the number of updates of the routing information table and the content that needs to be updated.
- FIG. 4 is a schematic structural diagram of an edge forwarding node according to an embodiment of the present invention.
- the edge forwarding node 400 may include a receiving unit 401, a listening unit 402, a determining unit 403, and an adding unit 404, where:
- the receiving unit 401 is configured to receive the interest indication message sent by the filtering gateway, where the interest indication message is used to indicate that the aggregation unit is interested in the Internet of Things data reported by the terminal device in the target geographic location.
- the listening unit 402 is configured to listen to the Internet of Things data reported by a plurality of terminal devices in the wireless coverage area, where the Internet of Things data may include the data content and the setting of the terminal device that reports the Internet of Things data. The identification and the geographical location of the terminal device.
- the determining unit 403 is configured to determine, when the plurality of terminal devices in the plurality of terminal devices that the geographical location is the target geographic location, whether the device identifier is not stored in the pre-generated routing information table. At least one terminal device.
- the adding unit 404 is configured to add, when the determining unit 403 determines that the at least one terminal device exists in the plurality of terminal devices, add the device identifier of each terminal device in the at least one terminal device to the routing information table.
- the edge forwarding node 400 described in FIG. 4 can update the device identifier of the terminal device that is added to the geographic location where the aggregation unit is interested in the geographic location to the edge forwarding node according to the actual needs of the aggregation unit.
- the information table reduces the number of updates of the routing information table, thereby reducing the power consumption of the edge forwarding node.
- the edge forwarding node 400 may further include a deleting unit 405.
- the structure of the edge forwarding node 400 may be as shown in FIG. 5, and FIG. 5 is another embodiment disclosed in the embodiment of the present invention. Schematic diagram of the edge forwarding node. among them:
- the determining unit 403 is further configured to determine whether the device identifier of the offline terminal device exists in the routing information table, where the offline terminal device is a terminal device that does not report the Internet of Things data to the edge forwarding node within a preset time period, And the offline terminal device may include the terminal device that has been damaged and/or the terminal device that has been in the long-off state and the terminal device that has been added to the routing information table of the adjacent forwarding node.
- the deleting unit 405 is configured to delete the device identifier of the offline terminal device from the routing information table when the determining unit 403 determines that the device identifier of the offline terminal device exists.
- edge forwarding node 400 described in FIG. 5 can delete the device identifier of the terminal device that is already offline in the routing information table in time, which is beneficial to the maintenance of the Internet of Things topology in the Internet of Things architecture.
- the determining unit 403 is further configured to: after determining that the at least one terminal device exists in the multiple terminal devices, and in the adding unit 404, add the device identifier of each terminal device in the at least one terminal device to the routing information. Before the table, it is determined whether there is a passing terminal device in the at least one terminal device, and when it is determined that there is no passing terminal device in the at least one terminal device, the trigger adding unit 404 performs each of the at least one terminal device. The device ID of the device is added to the operation in the routing information table.
- the adding unit 404 is specifically configured to: when the at least one terminal device exists in the plurality of terminal devices, and the terminal device that passes through does not exist in the at least one terminal device, The device identifier of each of the at least one terminal device is added to the routing information table.
- the adding unit 404 is further configured to: when the determining unit 403 determines that the at least one terminal device has the passing terminal device, add the device identifier of the terminal device other than the passing terminal device in the at least one terminal device to In the above routing information table.
- edge forwarding node 400 described in FIG. 5 can also filter out the newly passed terminal device in the terminal device whose geographical location is the target geographic location of interest to the aggregation unit, and reduce the edge forwarding node 400. Updates when updating the routing information table.
- FIG. 6 is a schematic structural diagram of still another edge forwarding node according to an embodiment of the present invention. among them:
- the statistic unit 406 is configured to report the reporting frequency of the Internet of Things data reported by the target terminal device in the geographic location of all the terminal devices corresponding to the device identifiers in the routing information table.
- the sending unit 407 is configured to send, according to the reporting frequency of the target terminal device, the reporting unit, a reporting frequency up-regulation command to the terminal device whose frequency is lower than the preset reporting frequency threshold.
- the setting unit 408 is configured to set, in the routing information table, a reporting priority for the device identifier of the terminal device whose frequency is lower than the preset reporting frequency threshold in the target terminal device, where the reporting frequency is smaller, the set reporting is performed. The greater the priority.
- the edge forwarding node 600 described in FIG. 6 can send a reporting frequency up-regulation command to a terminal device that reports a lower-frequency reporting of the Internet of Things data in the terminal device whose geographic location is the target geographic location where the aggregation unit is interested. Setting a high reporting priority for the device identifiers of the terminal devices improves the reliability of the IoT data reported by the aggregation unit to the terminal devices in the geographic location of interest.
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Abstract
一种边缘转发节点的路由信息表更新方法及边缘转发节点，该方法包括：边缘转发节点接收过滤网关下发的兴趣指示消息并侦听其无线覆盖范围内的大量终端设备上报的物联网数据，当该大量终端设备中存在所处的地理位置为目标地理位置的多个终端设备时，边缘转发节点判断该多个终端设备中是否存在设备标识未存储于预先生成的路由信息表中的至少一个终端设备，如果是，则将该至少一个终端设备中每个终端设备的设备标识添加至路由信息表中。实施本发明实施例能够根据汇聚单元的实际需求更新边缘转发节点的路由信息表，进而减少路由信息表的更新次数。
Description
本发明涉及物联网技术领域，尤其涉及一种边缘转发节点的路由信息表更新方法及边缘转发节点。
在物联网架构中，处于物联网架构中的终端设备可以采集相应的物联网数据并通过转发节点上报至充当物联网人机接口的汇聚单元，以使汇聚单元进行分析和决策，其中，能够直接侦听终端设备上报的物联网数据的转发节点称为边缘转发节点，边缘转发节点中存储有路由信息表且需要将其无线覆盖范围内新增的终端设备的相关信息(如设备标识及设备地址等)更新至路由信息表中，以将新增的终端设备添加至物联网架构中。但是，每当边缘转发节点的无线覆盖范围内新增终端设备时，边缘转发节点均需要根据新增的终端设备更新路由信息表，这导致了路由信息表更新频繁的问题。
发明内容
本发明实施例公开了一种边缘转发节点的路由信息表更新方法及边缘转发节点，能够根据汇聚单元的实际需求更新边缘转发节点的路由信息表，进而减少路由信息表的更新次数。
本发明实施例第一方面公开了一种边缘转发节点的路由信息表更新方法，所述方法包括：
所述边缘转发节点接收过滤网关下发的兴趣指示消息，所述兴趣指示消息用于指示汇聚单元对处于目标地理位置内的终端设备上报的物联网数据感兴趣；
所述边缘转发节点侦听其无线覆盖范围内的大量终端设备上报的物联网数据，所述物联网数据包括数据内容、上报该物联网数据的终端设备的设备标识以及该终端设备所处的地理位置；
当所述大量终端设备中存在所处的地理位置为所述目标地理位置的多个终端设备时，所述边缘转发节点判断所述多个终端设备中是否存在设备标识未存储于预先生成的路由信息表中的至少一个终端设备，当判断出所述多个终端设备中
存在所述至少一个终端设备时，将所述至少一个终端设备中每个终端设备的设备标识添加至所述路由信息表中。
作为一种可选的实施方式，在本发明实施例第一方面中，所述方法还包括：
所述边缘转发节点判断所述路由信息表中是否存在离线的终端设备的设备标识，当判断出存在所述离线的终端设备的设备标识时，从所述路由信息表中删除所述离线的终端设备的设备标识，所述离线的终端设备为在预设时间段内未向所述边缘转发节点上报物联网数据的终端设备。
作为一种可选的实施方式，在本发明实施例第一方面中，在判断出所述多个终端设备中存在所述至少一个终端设备之后，以及所述将所述至少一个终端设备中每个终端设备的设备标识添加至所述路由信息表中之前，所述方法还包括：
所述边缘转发节点判断所述至少一个终端设备中是否存在路过的终端设备，当判断出所述至少一个终端设备中不存在所述路过的终端设备时，触发执行所述将所述至少一个终端设备中每个终端设备的设备标识添加至所述路由信息表中的操作；
所述方法还包括：
当判断出所述至少一个终端设备中存在所述路过的终端设备时，所述边缘转发节点将所述至少一个终端设备中除所述路过的终端设备之外的终端设备的设备标识添加至所述路由信息表中。
作为一种可选的实施方式，在本发明实施例第一方面中，所述方法还包括：
所述边缘转发节点统计所述路由信息表中存储的设备标识对应的所有终端设备中所处的地理位置为所述目标地理位置的目标终端设备上报物联网数据的上报频率，并向所述目标终端设备中上报频率低于预设上报频率阈值的终端设备发送上报频率上调指令。
作为一种可选的实施方式，在本发明实施例第一方面中，所述方法还包括：
所述边缘转发节点在所述路由信息表中为所述目标终端设备中上报频率低于所述预设上报频率阈值的终端设备的设备标识设定上报优先级，其中，上报频率越小，设定的上报优先级越大。
本发明实施例第二方面公开了一种边缘转发节点，所述边缘转发节点包括接收单元、侦听单元、判断单元以及添加单元，其中：
所述接收单元，用于接收过滤网关下发的兴趣指示消息，所述兴趣指示消息
用于指示汇聚单元对处于目标地理位置内的终端设备上报的物联网数据感兴趣；
所述侦听单元，用于侦听其无线覆盖范围内的大量终端设备上报的物联网数据，所述物联网数据包括数据内容、上报该物联网数据的终端设备的设备标识以及该终端设备所处的地理位置；
所述判断单元，用于当所述大量终端设备中存在所处的地理位置为所述目标地理位置的多个终端设备时，判断所述多个终端设备中是否存在设备标识未存储于预先生成的路由信息表中的至少一个终端设备；
所述添加单元，用于当所述判断单元判断出所述多个终端设备中存在所述至少一个终端设备时，将所述至少一个终端设备中每个终端设备的设备标识添加至所述路由信息表中。
作为一种可选的实施方式，在本发明实施例第二方面中，所述判断单元，还用于判断所述路由信息表中是否存在离线的终端设备的设备标识，所述离线的终端设备为在预设时间段内未向所述边缘转发节点上报物联网数据的终端设备；
所述边缘转发节点还包括删除单元，其中：
所述删除单元，用于当所述判断单元判断出存在所述离线的终端设备的设备标识时，从所述路由信息表中删除所述离线的终端设备的设备标识。
作为一种可选的实施方式，在本发明实施例第二方面中，所述判断单元，还用于在判断出所述多个终端设备中存在所述至少一个终端设备之后以及在所述添加单元将所述至少一个终端设备中每个终端设备的设备标识添加至所述路由信息表中之前，判断所述至少一个终端设备中是否存在路过的终端设备，当判断出所述至少一个终端设备中不存在所述路过的终端设备时，触发所述添加单元执行所述将所述至少一个终端设备中每个终端设备的设备标识添加至所述路由信息表中的操作；
所述添加单元，还用于当所述判断单元判断出所述至少一个终端设备中存在所述路过的终端设备时，将所述至少一个终端设备中除所述路过的终端设备之外的终端设备的设备标识添加至所述路由信息表中。
作为一种可选的实施方式，在本发明实施例第二方面中，所述边缘转发节点还包括统计单元以及发送单元，其中：
所述统计单元，用于统计所述路由信息表中存储的设备标识对应的所有终端设备中所处的地理位置为所述目标地理位置的目标终端设备上报物联网数据的
上报频率；
所述发送单元，用于向所述目标终端设备中上报频率低于预设上报频率阈值的终端设备发送上报频率上调指令。
作为一种可选的实施方式，在本发明实施例第二方面中，所述边缘转发节点还包括设定单元，其中：
所述设定单元，用于在所述路由信息表中为所述目标终端设备中上报频率低于所述预设上报频率阈值的终端设备的设备标识设定上报优先级，其中，上报频率越小，设定的上报优先级越大。
与现有技术相比，本发明实施例具有以下有益效果：
本发明实施例中，边缘转发节点接收过滤网关下发的兴趣指示消息，该兴趣指示消息用于指示汇聚单元对处于目标地理位置内的终端设备上报的物联网数据感兴趣，并侦听其无线覆盖范围内的大量终端设备上报的物联网数据，该物联网数据包括数据内容、上报该物联网数据的终端设备的设备标识以及该终端设备所处的地理位置，当该大量终端设备中存在所处的地理位置为目标地理位置的多个终端设备时，边缘转发节点判断该多个终端设备中是否存在设备标识未存储于预先生成的路由信息表中的至少一个终端设备，当判断出该多个终端设备中存在该至少一个终端设备时，将该至少一个终端设备中每个终端设备的设备标识添加至路由信息表中。实施本发明实施例能够根据汇聚单元的实际需求将新增的且所处的地理位置为汇聚单元感兴趣的地理位置的终端设备的设备标识更新至边缘转发节点的路由信息表，减少了路由信息表的更新次数，进而减少了边缘转发节点的功耗。
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例公开的一种物联网架构的示意图；
图2是本发明实施例公开的一种边缘转发节点的路由信息表更新方法的流程示意图；
图3是本发明实施例公开的另一种边缘转发节点的路由信息表更新方法的流程示意图；
图4是本发明实施例公开的一种边缘转发节点的结构示意图；
图5是本发明实施例公开的另一种边缘转发节点的结构示意图；
图6是本发明实施例公开的又一种边缘转发节点的结构示意图。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例公开了一种边缘转发节点的路由信息表更新方法及边缘转发节点，能够根据汇聚单元的实际需求将新增的且所处的地理位置为汇聚单元感兴趣的地理位置的终端设备的设备标识更新至边缘转发节点的路由信息表，减少了路由信息表的更新次数，进而减少了边缘转发节点的功耗。以下分别进行详细说明。
为了更好地理解本发明实施例，下面先对本发明实施例公开的一种物联网架构进行介绍。请参阅图1，图1是本发明实施例公开的一种物联网架构的示意图。如图1所示，该物联网架构按照功能划分可以包括终端设备层、转发节点层以及汇聚层三个层。其中，终端设备层可以包括海量规模的终端设备，例如湿度计、烟感器、通风设备、雨量传感器、灌溉阀等等；转发节点层可以包括网络连接的大量的转发节点，转发节点可以包括路由器、中继器、接入点等设备，本发明实施例不作限定，且在转发节点层中，能够直接侦听终端设备层中的终端设备上报的物联网数据的转发节点又可以叫做边缘转发节点；转发节点可以使用任何标准的组网协议，而且转发节点可以在不同的网络制式之间实现数据解析；汇聚层可以包括过滤网关和汇聚单元，其中，过滤网关可以通过互联网与转发节点层的各个转发节点直接或简介通讯连接；汇聚单元可以通过过滤网关对转发节点层的各个转发节点进行高层管理，从而实现数据传输频率、网络拓扑以及其他组网功能的控制；汇聚单元不仅可以对海量终端设备产生的物联网数据进行分析和决策，还可以通过发指令去获取信息或者配置终端设备参数(此时数据的传输指向终端设备)；汇聚单元还可以引入各种业务，从大数据到社交网络、甚至从社交工具“点
赞”到天气分享等。在图1所示的物联网架构中，每一个转发节点可以为其自身无线覆盖范围内的海量终端设备提供物联网数据收发服务，其中，每一转发节点自身无线覆盖范围内的每一个终端设备可以内置有无线通讯模块，这使得每一转发节点可以通过无线网络通讯方式与自身无线覆盖范围内的每一个终端设备进行无线通讯。在图1所示的物联网架构中，终端设备内置的无线通讯模块在生产时，可以输入上频点470MHz，下频点510MHz，这样无线通讯模块可以自动将通讯频段定义为470MHz～510MHz，以符合中国SRRC标准的规定；或者，也可以输入上频点868MHz，下频点908MHz，这样无线通讯模块可以自动将通讯频段定义为868MHz～908MHz，以符合欧洲ETSI标准的规定；或者，可以输入上频点918MHz，下频点928MHz，这样无线通讯模块可以自动将通讯频段定义为918MHz～928MHz，以符合美国FCC标准的规定；或者，无线通讯模块的通讯频段也可以定义为符合日本ARIB标准或加拿大IC标准的规定，本发明实施例不作限定。在图1所示的物联网架构中，终端设备可以采用频分复用(Frequency Division Multiple Access，FDMA)、跳频(Frequency-Hopping Spread Spectrum，FHSS)、动态时分复用(Dynamic Time Division Multiple Access，DTDMA)、退避复用(CSMA)相结合的方法来解决干扰问题。
实施例一
请参阅图2，图2是本发明实施例公开的一种边缘转发节点的路由信息表更新方法的流程示意图。如图2所示，该边缘转发节点的路由信息表更新方法可以包括如下操作：
201、边缘转发节点接收过滤网关下发的兴趣指示消息，该兴趣指示消息用于指示汇聚单元对处于目标地理位置内的终端设备上报的物联网数据感兴趣。
本发明实施例中，该目标地理位置可以为某一农场、某个城市、某一工厂或某个学校等，本发明实施例不做限定。
本发明实施例中，边缘转发节点接收过滤网关下发的兴趣指示消息可以包括：
边缘转发节点向过滤网关发送包括边缘转发节点的节点标识的第一兴趣请求，以触发过滤网关根据第一兴趣请求中包括的节点标识判断该边缘转发节点是否为已授权的边缘转发节点且在判断结果为是时向汇聚单元发送包括边缘转发节点的节点标识以及过滤网关的网关标识的第二兴趣请求，其中，该第一兴趣请
求以及该第二兴趣请求用于请求汇聚单元指示其感兴趣的物联网数据，其中，在汇聚单元接收到该第二兴趣请求之后，由汇聚单元根据该第二兴趣请求包括的节点标识以及网关标识对边缘转发节点以及过滤网关进行身份认证且在身份认证通过时向过滤网关返回兴趣指示消息；
边缘转发节点接收过滤网关下发的兴趣指示消息。
可选的，边缘转发节点向过滤网关发送包括边缘转发节点的节点标识的第一兴趣请求可以包括：
边缘转发节点检测其与过滤网关之间的无线端口的负荷值并判断该负荷值是否小于指定负荷阈值，如果小于该指定负荷阈值，则通过该无线端口向过滤网关发送包括边缘转发节点的节点标识的第一兴趣请求，这样能够提高边缘转发节点成功发送第一兴趣请求的可靠性。
202、边缘转发节点侦听其无线覆盖范围内的大量终端设备上报的物联网数据，该物联网数据包括数据内容、上报该物联网数据的终端设备的设备标识以及该终端设备所处的地理位置。
本发明实施例中，边缘转发节点侦听到的物联网数据是由其无线覆盖范围内的终端设备利用本地Wi-Fi、蓝牙、红外等无线方式进行上报的。
203、当上述多个终端设备中存在所处的地理位置为上述目标地理位置的多个终端设备时，边缘转发节点判断该多个终端设备中是否存在设备标识未存储于预先生成的路由信息表中的至少一个终端设备，当步骤203的判断结果为是时，触发执行步骤204，当步骤203的判断结果为否时，可以结束本次流程，即不对边缘转发节点的路由信息表进行更新。
本发明实施例中，该路由信息表中存储有边缘转发节点的无线覆盖范围内的终端设备的设备标识。
204、边缘转发节点将上述至少一个终端设备中每个终端设备的设备标识添加至路由信息表中。
在一个可选的实施例中，该边缘转发节点的路由信息表更新方法还可以包括以下操作：
边缘转发节点判断上述路由信息表中是否存在离线的终端设备的设备标识，当判断出存在离线的终端设备的设备标识时，从上述路由信息表中删除离线的终端设备的设备标识，其中，离线的终端设备为在预设时间段内未向边缘转发节点
上报物联网数据的终端设备，且离线的终端设备可以包括已经损坏的终端设备和/或已经处于长时间关闭状态的终端设备以及设备标识已经被添加至相邻转发节点的路由信息表的终端设备。
该可选的实施例能够及时将已经离线的终端设备的设备标识从路由信息表中删除，有利于物联网架构中物联网拓扑结构的即时更新。
本发明实施例中，当上述大量终端设备中存在所处的地理位置为目标地理位置的多个终端设备时，边缘转发节点还可以将其侦听到的上述物联网数据封装成数据元并将该数据元发送至该边缘转发节点的下一跳转发节点，或者，边缘转发节点也可以将其侦听到的物联网数据中包括的地理位置为上述目标地理位置的物联网数据封装成数据元并将该数据元发送至该边缘转发节点的下一跳转发节点；当上述大量终端设备中不存在所处的地理位置为上述目标地理位置的多个终端设备时，边缘转发节点可以直接过滤掉上述大量终端设备上报的物联网数据，本发明实施例不做限定。
可见，实施图2所描述的边缘转发节点的路由信息表更新方法能够根据汇聚单元的实际需求将新增的且所处的地理位置为汇聚单元感兴趣的地理位置的终端设备的设备标识更新至边缘转发节点的路由信息表，减少了路由信息表的更新次数，进而减少了边缘转发节点的功耗。
实施例二
请参阅图3，图3是本发明实施例公开的另一种边缘转发节点的路由信息表更新方法的流程示意图。如图3所示，该边缘转发节点的路由信息表更新方法可以包括以下操作：
301、边缘转发节点接收过滤网关下发的兴趣指示消息，该兴趣指示消息用于指示汇聚单元对处于目标地理位置内的终端设备上报的物联网数据感兴趣。
302、边缘转发节点侦听其无线覆盖范围内的大量终端设备上报的物联网数据，该物联网数据包括数据内容、上报该物联网数据的终端设备的设备标识以及该终端设备所处的地理位置。
303、当上述多个终端设备中存在所处的地理位置为上述目标地理位置的多个终端设备时，边缘转发节点判断该多个终端设备中是否存在设备标识未存储于预先生成的路由信息表中的至少一个终端设备，当步骤303的判断结果为是时，触发执行步骤304，当步骤303的判断结果为否时，可以结束本次流程，即不对
边缘转发节点的路由信息表进行更新。
304、边缘转发节点判断上述至少一个终端设备中是否存在路过的终端设备，当步骤304的判断结果为否时，触发执行步骤305，当步骤304的判断结果为是时，触发执行步骤306。
本发明实施例中，边缘转发节点判断上述至少一个终端设备中是否存在路过的终端设备可以包括：
边缘转发节点向其无线覆盖范围内的相邻转发节点发送查询请求，该查询请求用于请求相邻转发节点查询相邻转发节点存储的路由信息表中是否存储有上述至少一个终端设备中其中一个终端设备的设备标识；
边缘转发节点接收相邻转发节点返回的查询响应，当其中一个查询响应指示对应的相邻转发节点存储的路由信息表中存储有上述至少一个终端设备中其中一个终端设备的设备标识时，确定上述至少一个终端设备中存在路过的终端设备，当任意一个查询响应都指示对应的相邻转发节点存储的路由信息表中未存储有上述至少一个终端设备中任意一个终端设备的设备标识时，确定上述至少一个终端设备中不存在路过的终端设备。
305、边缘转发节点将上述至少一个终端设备中每个终端设备的设备标识添加至路由信息表中。
306、边缘转发节点将至少一个终端设备中除路过的终端设备之外的终端设备的设备标识添加至路由信息表中。
在一个可选的实施例中，该边缘转发节点的路由信息表更新方法还可以包括以下操作：
边缘转发节点判断上述路由信息表中是否存在离线的终端设备的设备标识，当判断出存在离线的终端设备的设备标识时，从上述路由信息表中删除离线的终端设备的设备标识，其中，离线的终端设备为在预设时间段内未向边缘转发节点上报物联网数据的终端设备，且离线的终端设备可以包括已经损坏的终端设备和/或已经处于长时间关闭状态的终端设备和/或设备标识已经被添加至相邻转发节点的路由信息表的终端设备。
该可选的实施例能够及时将已经离线的终端设备的设备标识从路由信息表中删除，有利于物联网架构中物联网拓扑结构的即时更新。
在另一个可选的实施例中，该边缘转发节点的路由信息表更新方法还可以包
括以下操作：
边缘转发节点统计上述路由信息表中存储的设备标识对应的所有终端设备中所处的地理位置为上述目标地理位置的目标终端设备上报物联网数据的上报频率，并向该目标终端设备中上报频率低于预设上报频率阈值的终端设备发送上报频率上调指令。这样可以提高汇聚单元接收到其感兴趣的地理位置的终端设备上报的物联网数据的可靠性。
在该另一种可选的实施例中，进一步可选的，该边缘转发节点的路由信息表更新方法还可以包括以下操作：
边缘转发节点在上述路由信息表中为上述目标终端设备中上报频率低于上述预设上报频率阈值的终端设备的设备标识设定上报优先级，其中，上报频率越小，设定的上报优先级越大。这样能够在接收到上报频率较低的终端设备上报的物联网数据时能够根据为其设定的优先级优先上报该部分物联网数据或者优先为该部分物联网数据选择可靠性较高的转发路径，进一步提高了汇聚单元接收到其感兴趣且上报频率较低的终端设备上报的物联网数据的可靠性。
可见，实施图3所描述的边缘转发节点的路由信息表更新方法能够根据汇聚单元的实际需求将新增的且所处的地理位置为汇聚单元感兴趣的地理位置的终端设备的设备标识更新至边缘转发节点的路由信息表，减少了路由信息表的更新次数，进而减少了边缘转发节点的功耗，方便物联网架构中网络拓扑的维护，且在将新增的且所处的地理位置为汇聚单元感兴趣的地理位置的终端设备的设备标识更新至边缘转发节点的路由信息表时，自动过滤掉临时路过的终端设备，这样能够进一步减少路由信息表的更新次数以及需要更新的内容。
实施例三
请参阅图4，图4是本发明实施例公开的一种边缘转发节点的结构示意图。如图4所示，该边缘转发节点400可以包括接收单元401、侦听单元402、判断单元403以及添加单元404，其中：
接收单元401用于接收过滤网关下发的兴趣指示消息，其中，该兴趣指示消息用于指示汇聚单元对处于目标地理位置内的终端设备上报的物联网数据感兴趣。
侦听单元402用于侦听其无线覆盖范围内的大量终端设备上报的物联网数据，其中，该物联网数据可以包括数据内容、上报该物联网数据的终端设备的设
备标识以及该终端设备所处的地理位置。
判断单元403用于当上述大量终端设备中存在所处的地理位置为目标地理位置的多个终端设备时，判断该多个终端设备中是否存在设备标识未存储于预先生成的路由信息表中的至少一个终端设备。
添加单元404用于当判断单元403判断出上述多个终端设备中存在上述至少一个终端设备时，将该至少一个终端设备中每个终端设备的设备标识添加至路由信息表中。
可见，实施图4所描述的边缘转发节点400能够根据汇聚单元的实际需求将新增的且所处的地理位置为汇聚单元感兴趣的地理位置的终端设备的设备标识更新至边缘转发节点的路由信息表，减少了路由信息表的更新次数，进而减少了边缘转发节点的功耗。
在一个可选的实施例中，该边缘转发节点400还可以包括删除单元405，此时，该边缘转发节点400的结构可以如图5所示，图5是本发明实施例公开的另一种边缘转发节点的结构示意图。其中：
判断单元403还可以用于判断上述路由信息表中是否存在离线的终端设备的设备标识，其中，该离线的终端设备为在预设时间段内未向边缘转发节点上报物联网数据的终端设备，且离线的终端设备可以包括已经损坏的终端设备和/或已经处于长时间关闭状态的终端设备以及设备标识已经被添加至相邻转发节点的路由信息表的终端设备。
删除单元405用于当判断单元403判断出存在上述离线的终端设备的设备标识时，从上述路由信息表中删除上述离线的终端设备的设备标识。
可见，实施图5所描述的边缘转发节点400能够及时删除路由信息表中已经处于离线状态的终端设备的设备标识，有利于物联网架构中物联网拓扑的维护。
可选的，判断单元403还可以用于在判断出上述多个终端设备中存在上述至少一个终端设备之后以及在添加单元404将上述至少一个终端设备中每个终端设备的设备标识添加至路由信息表中之前，判断上述至少一个终端设备中是否存在路过的终端设备，当判断出上述至少一个终端设备中不存在路过的终端设备时，触发添加单元404执行上述将至少一个终端设备中每个终端设备的设备标识添加至路由信息表中的操作。即，添加单元404具体用于当上述多个终端设备中存在上述至少一个终端设备且上述至少一个终端设备中不存在路过的终端设备时，将
上述至少一个终端设备中每个终端设备的设备标识添加至路由信息表中。
添加单元404还可以用于当判断单元403判断出上述至少一个终端设备中存在上述路过的终端设备时，将上述至少一个终端设备中除上述路过的终端设备之外的终端设备的设备标识添加至上述路由信息表中。
可见，实施图5所描述的边缘转发节点400还能够过滤掉新增的所处的地理位置为汇聚单元感兴趣的目标地理位置的终端设备中的路过的终端设备，减少了边缘转发节点400在更新路由信息表时的更新内容。
进一步可选的，该边缘转发节点400还可以包括统计单元406以及发送单元407，又进一步可选的，还可以包括设定单元408，此时，该边缘转发节点400的结构可以如图6所示，如图6所示，图6是本发明实施例公开的又一种边缘转发节点的结构示意图。其中：
统计单元406用于统计上述路由信息表中存储的设备标识对应的所有终端设备中所处的地理位置为上述目标地理位置的目标终端设备上报物联网数据的上报频率。
发送单元407用于根据统计单元406统计出的目标终端设备的上报频率向目标终端设备中上报频率低于预设上报频率阈值的终端设备发送上报频率上调指令。
设定单元408用于在上述路由信息表中为上述目标终端设备中上报频率低于预设上报频率阈值的终端设备的设备标识设定上报优先级，其中，上报频率越小，设定的上报优先级越大。
可见，实施图6所描述的边缘转发节点600能够向所处的地理位置为汇聚单元感兴趣的目标地理位置的终端设备中上报物联网数据的上报频率较低的终端设备发送上报频率上调指令并为这些终端设备的设备标识设定高的上报优先级，提高了汇聚单元接收到处于其感兴趣的地理位置的终端设备上报的物联网数据的可靠性。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，该程序可以存储于一计算机可读存储介质中，存储介质包括只读存储器(Read-Only Memory，ROM)、随机存储器(Random Access Memory，RAM)、可编程只读存储器(Programmable Read-only Memory，PROM)、可擦除可编程只读存储器(Erasable Programmable Read Only
Memory，EPROM)、一次可编程只读存储器(One-time Programmable Read-Only Memory，OTPROM)、电子抹除式可复写只读存储器(Electrically-Erasable Programmable Read-Only Memory，EEPROM)、只读光盘(Compact Disc Read-Only Memory，CD-ROM)或其他光盘存储器、磁盘存储器、磁带存储器、或者能够用于携带或存储数据的计算机可读的任何其他介质。
以上对本发明实施例公开的一种边缘转发节点的路由信息表更新方法及边缘转发节点进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。
Claims (10)
- 一种边缘转发节点的路由信息表更新方法，其特征在于，所述方法包括：所述边缘转发节点接收过滤网关下发的兴趣指示消息，所述兴趣指示消息用于指示汇聚单元对处于目标地理位置内的终端设备上报的物联网数据感兴趣；所述边缘转发节点侦听其无线覆盖范围内的大量终端设备上报的物联网数据，所述物联网数据包括数据内容、上报该物联网数据的终端设备的设备标识以及该终端设备所处的地理位置；当所述大量终端设备中存在所处的地理位置为所述目标地理位置的多个终端设备时，所述边缘转发节点判断所述多个终端设备中是否存在设备标识未存储于预先生成的路由信息表中的至少一个终端设备，当判断出所述多个终端设备中存在所述至少一个终端设备时，将所述至少一个终端设备中每个终端设备的设备标识添加至所述路由信息表中。
- 根据权利要求1所述的边缘转发节点的路由信息表更新方法，其特征在于，所述方法还包括：所述边缘转发节点判断所述路由信息表中是否存在离线的终端设备的设备标识，当判断出存在所述离线的终端设备的设备标识时，从所述路由信息表中删除所述离线的终端设备的设备标识，所述离线的终端设备为在预设时间段内未向所述边缘转发节点上报物联网数据的终端设备。
- 根据权利要求1或2所述的边缘转发节点的路由信息表更新方法，其特征在于，在判断出所述多个终端设备中存在所述至少一个终端设备之后，以及所述将所述至少一个终端设备中每个终端设备的设备标识添加至所述路由信息表中之前，所述方法还包括：所述边缘转发节点判断所述至少一个终端设备中是否存在路过的终端设备，当判断出所述至少一个终端设备中不存在所述路过的终端设备时，触发执行所述将所述至少一个终端设备中每个终端设备的设备标识添加至所述路由信息表中的操作；所述方法还包括：当判断出所述至少一个终端设备中存在所述路过的终端设备时，所述边缘转发节点将所述至少一个终端设备中除所述路过的终端设备之外的终端设备的设备标识添加至所述路由信息表中。
- 根据权利要求1-3任一项所述的边缘转发节点的路由信息表更新方法，其特征在于，所述方法还包括：所述边缘转发节点统计所述路由信息表中存储的设备标识对应的所有终端设备中所处的地理位置为所述目标地理位置的目标终端设备上报物联网数据的上报频率，并向所述目标终端设备中上报频率低于预设上报频率阈值的终端设备发送上报频率上调指令。
- 根据权利要求4所述的边缘转发节点的路由信息表更新方法，其特征在于，所述方法还包括：所述边缘转发节点在所述路由信息表中为所述目标终端设备中上报频率低于所述预设上报频率阈值的终端设备的设备标识设定上报优先级，其中，上报频率越小，设定的上报优先级越大。
- 一种边缘转发节点，其特征在于，所述边缘转发节点包括接收单元、侦听单元、判断单元以及添加单元，其中：所述接收单元，用于接收过滤网关下发的兴趣指示消息，所述兴趣指示消息用于指示汇聚单元对处于目标地理位置内的终端设备上报的物联网数据感兴趣；所述侦听单元，用于侦听其无线覆盖范围内的大量终端设备上报的物联网数据，所述物联网数据包括数据内容、上报该物联网数据的终端设备的设备标识以及该终端设备所处的地理位置；所述判断单元，用于当所述大量终端设备中存在所处的地理位置为所述目标地理位置的多个终端设备时，判断所述多个终端设备中是否存在设备标识未存储于预先生成的路由信息表中的至少一个终端设备；所述添加单元，用于当所述判断单元判断出所述多个终端设备中存在所述至少一个终端设备时，将所述至少一个终端设备中每个终端设备的设备标识添加至所述路由信息表中。
- 根据权利要求6所述的边缘转发节点，其特征在于，所述判断单元，还用于判断所述路由信息表中是否存在离线的终端设备的设备标识，所述离线的终端设备为在预设时间段内未向所述边缘转发节点上报物联网数据的终端设备；所述边缘转发节点还包括删除单元，其中：所述删除单元，用于当所述判断单元判断出存在所述离线的终端设备的设备标识时，从所述路由信息表中删除所述离线的终端设备的设备标识。
- 根据权利要求6或7所述的边缘转发节点，其特征在于，所述判断单元，还用于在判断出所述多个终端设备中存在所述至少一个终端设备之后以及在所述添加单元将所述至少一个终端设备中每个终端设备的设备标识添加至所述路由信息表中之前，判断所述至少一个终端设备中是否存在路过的终端设备，当判断出所述至少一个终端设备中不存在所述路过的终端设备时，触发所述添加单元执行所述将所述至少一个终端设备中每个终端设备的设备标识添加至所述路由信息表中的操作；所述添加单元，还用于当所述判断单元判断出所述至少一个终端设备中存在所述路过的终端设备时，将所述至少一个终端设备中除所述路过的终端设备之外的终端设备的设备标识添加至所述路由信息表中。
- 根据权利要求6-8任一项所述的边缘转发节点，其特征在于，所述边缘转发节点还包括统计单元以及发送单元，其中：所述统计单元，用于统计所述路由信息表中存储的设备标识对应的所有终端设备中所处的地理位置为所述目标地理位置的目标终端设备上报物联网数据的上报频率；所述发送单元，用于向所述目标终端设备中上报频率低于预设上报频率阈值的终端设备发送上报频率上调指令。
- 根据权利要求9所述的边缘转发节点，其特征在于，所述边缘转发节点还包括设定单元，其中：所述设定单元，用于在所述路由信息表中为所述目标终端设备中上报频率低于所述预设上报频率阈值的终端设备的设备标识设定上报优先级，其中，上报频率越小，设定的上报优先级越大。
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