WO2019104962A1 - 一种帧聚合、网络设置帧发送方法及设备 - Google Patents

一种帧聚合、网络设置帧发送方法及设备 Download PDF

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Publication number
WO2019104962A1
WO2019104962A1 PCT/CN2018/088091 CN2018088091W WO2019104962A1 WO 2019104962 A1 WO2019104962 A1 WO 2019104962A1 CN 2018088091 W CN2018088091 W CN 2018088091W WO 2019104962 A1 WO2019104962 A1 WO 2019104962A1
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Prior art keywords
node device
forwarding node
frame
cluster
msdu
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PCT/CN2018/088091
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English (en)
French (fr)
Inventor
刘冰
张民贵
吴悦峰
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华为技术有限公司
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Priority to JP2020528292A priority Critical patent/JP7040734B2/ja
Priority to FIEP18882551.7T priority patent/FI3703316T3/fi
Priority to EP18882551.7A priority patent/EP3703316B1/en
Publication of WO2019104962A1 publication Critical patent/WO2019104962A1/zh
Priority to US16/885,645 priority patent/US11272396B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2803—Home automation networks
    • H04L12/2823—Reporting information sensed by appliance or service execution status of appliance services in a home automation network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22—Parsing or analysis of headers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H04W28/065—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2803—Home automation networks
    • H04L2012/284—Home automation networks characterised by the type of medium used
    • H04L2012/2841—Wireless
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a frame aggregation, a network setting frame sending method, and a device.
  • Wi-SUN wireless smart ubiquitous network
  • FAN field area network
  • Wi-SUN FAN can be networked using the topology of a cluster tree.
  • nodes satisfying the preset condition may form a cluster, and nodes in one cluster have the same address prefix.
  • the nodes in the Wi-SUN FAN can be divided into: a leaf node device, an intermediate forwarding node device, and a cluster head forwarding node device.
  • the cluster head forwarding node device may also be referred to as an aggregation node.
  • the leaf node device can send and receive packets, but does not have the ability to forward packets, for example, a smart meter, an environmental monitoring device, or the like.
  • the intermediate forwarding node device can provide bidirectional packet forwarding, and can also have all the functions of the leaf node device.
  • the cluster head forwarding node device has one and only one in a cluster, which is the only data uplink channel in the cluster, and can also have all the functions of the intermediate forwarding node device.
  • the leaf node device After the data is collected, the leaf node device generates a data frame and reports it to the cluster head forwarding node device or reports it to the cluster head forwarding node device through the intermediate forwarding node device.
  • the cluster head forwarding node device reports the data frame to the router through the channel with the router. .
  • the intermediate forwarding node device or the cluster head forwarding node device can also report the data frame.
  • the reported data frame also needs to add a physical layer (PHY) header, a media access control (MAC) header, a frame check sequence (FCS), etc., and the protocol overhead is relatively high.
  • PHY physical layer
  • MAC media access control
  • FCS frame check sequence
  • the present invention provides a frame aggregation and network setting frame sending method and device, which are used to aggregate data frames, which helps to increase channel resource utilization and improve system performance.
  • the embodiment of the present application provides a frame aggregation method, which can be applied to a Wi-SUN FAN. Specifically, the method includes:
  • the first forwarding node device receives the first data frame sent by the first node device and the second data frame sent by the second node device, where the first data frame includes a first MAC header and a first MSDU, and the second data frame includes a first data frame Two MAC headers and a second MSDU.
  • the first forwarding node device determines that the destination MAC address in the first MAC header is the same as the destination MAC address in the second MAC header, and generates a first aggregation frame according to the first data frame and the second data frame; wherein, the first aggregation frame
  • the first aggregated MAC header and the first aggregated MSDU, the destination MAC address in the first aggregated MAC address is the same as the destination MAC address in the first MAC header or the destination MAC address in the second MAC header
  • the first aggregated MSDU includes the first The sub-MSDU and the second sub-MSDU, the first sub-MSDU includes a source MAC address in the first MSDU and the first MAC header, and the second sub-MSDU includes a source MAC address in the second MSDU and the second MAC header.
  • the first forwarding node device sends the first aggregation frame to the second forwarding node device.
  • the first forwarding node device can aggregate the received data frames with the same destination MAC address, which helps reduce packet overhead and reduce channel competition times.
  • the first node device, the second node device, and the first forwarding node device may belong to the first cluster, and the first cluster is included in the Wi-SUN FAN.
  • the first node device may be a leaf node device or an intermediate forwarding node device. If the first node device is an intermediate forwarding node device, the first data frame may be a data frame that has not been aggregated, or may also be an aggregation frame; The node device may also be a leaf node device or an intermediate forwarding node device. If the second node device is an intermediate forwarding node device, the second data frame may be a data frame that has not been aggregated, or may also be an aggregated frame.
  • the first forwarding node device may aggregate the un-aggregated data frames or the aggregated frames sent by the leaf node device or the intermediate forwarding node device in the same cluster.
  • the first forwarding node device may have two leaves.
  • the data frames sent by the node device are aggregated, and the frames sent by the two intermediate forwarding node devices may be aggregated, and the frames sent by the leaf node device and the intermediate forwarding node device may also be aggregated.
  • the first forwarding node device may aggregate two un-aggregated data frames, or may perform aggregation on the two aggregated frames again, and may also aggregate the un-aggregated data frames and the aggregated frames.
  • the first forwarding node device may belong to the first cluster together with the second node device, and the first node device is the cluster head node device in the second cluster, and the corresponding first data frame is aggregated.
  • the frame, the first cluster and the second cluster are different but are all included in the Wi-SUN FAN.
  • the first forwarding node device may aggregate the data frames sent by the node devices belonging to one cluster and the aggregate frames sent by the cluster head nodes in other clusters.
  • the second node device may be a leaf node device or an intermediate forwarding node device.
  • the first forwarding node device is an intermediate forwarding node device
  • the second forwarding node device is a cluster head forwarding node device or an intermediate forwarding node device, where the first forwarding node device and the second forwarding node device belong to the same Cluster.
  • the first forwarding node device and the second forwarding node device belong to different clusters
  • the first forwarding node device is a cluster head forwarding node device
  • the second forwarding node device is an intermediate forwarding node device or a cluster head.
  • the node device is forwarded, and both the first forwarding node device and the second forwarding node device belong to the Wi-SUN FAN.
  • the first forwarding node device may be a cluster head node device, and send the generated aggregation frame to the intermediate forwarding node device or the cluster head forwarding node device in the previous hop.
  • the second forwarding node device may further aggregate the first aggregation frame sent by the first forwarding node device and the data frame sent by other node devices in the cluster where the second forwarding node device is located.
  • the first forwarding node device is a cluster head forwarding node device
  • the second forwarding node device is an edge router
  • the edge router is not included in the Wi-SUN FAN.
  • the first forwarding node device is a cluster head forwarding node device, and the first forwarding node device may further receive a network setting frame from the edge router, where the network setting frame is used to indicate that the first forwarding node device reports The time of the first aggregated frame and the data acquisition time of the first node device and the second node device.
  • the first forwarding node device determines, according to the network setting frame, a deadline for reporting the first aggregation frame, and according to the deadline, the second forwarding node device sends the first aggregation frame.
  • the network setting frame from the edge router is generated by the edge router, but is not necessarily sent directly by the edge router to the first forwarding node device.
  • the edge router sends the network setting frame to the cluster head connected to the edge router.
  • the cluster head forwarding node device sends the network setting frame to the leaf node device, the intermediate forwarding node device or the cluster head forwarding node device in the other cluster connected to the cluster head forwarding node.
  • the first forwarding node device determines, according to the network setting frame, a deadline for sending the first aggregation frame, which helps ensure the timeliness of the data, and prevents the first forwarding node device from waiting for receiving the data frame for a long time.
  • the data collected by the device cannot be uploaded to the upper application in time.
  • the network setting frame may include a network setting timestamp, a cluster hop count, and a sampling period, where the network setting timestamp is a reference time for determining a sampling period, and the cluster hopping number indicates a sending network.
  • the network setting timestamp is a reference time for determining a sampling period
  • the cluster hopping number indicates a sending network.
  • the sampling period is used to indicate that the first node device and the second node device collect data according to the sampling period.
  • the first forwarding node device may obtain the first time according to the network setting time stamp and the sampling period, and remove the cluster hops from the cutoff time gradient in the first time, thereby obtaining a cutoff time, wherein the cutoff time gradient is used to indicate the first
  • a forwarding node device sends the first aggregated frame to the forwarding node device outside the cluster where the first forwarding node device is located, and then increases the number of cluster hops in the network setting frame by one.
  • the first forwarding node device may also first increase the cluster hop by one, and then obtain the deadline according to the foregoing method.
  • the cutoff time gradient may be carried in the network setting frame and sent to the first forwarding node device, or the deadline gradient may also be configured in advance for the first forwarding node device.
  • the first sub-MSDU and the second sub-MSDU each include a length field, which is used to indicate the length of the sub-MSDU. Since the first aggregation MSDU in the first aggregation frame may include multiple sub-MSDUs, the length field indicates the length of each sub-MSDU, so that other devices can distinguish the previous sub-MSDU and the next sub-MSDU when parsing the aggregation frame.
  • the embodiment of the present application provides a network setting frame sending method, including:
  • the edge router obtains network setting parameters, and the network setting parameter includes a sampling period, where the sampling period is used to instruct the node device to collect data according to the sampling period; the edge router generates a network setting frame according to the network setting parameter, and the network setting frame includes a network setting timestamp and a cluster.
  • the cluster hop count represents the hop count of the cluster where the edge router of the network setting frame is sent to the destination node device; the edge router forwards the node device to the cluster head Sending the network setting frame, the cluster head forwarding node device is located in a first cluster in the Wi-SUN FAN, and the first cluster communicates with the edge router via the cluster head forwarding node device.
  • the edge router generates a network setting frame according to the acquired network setting parameter, and sends it to each node device in the Wi-SUN FAN via the cluster head forwarding node device connected thereto, so that each node device determines the sampling period and follows Data is collected during the sampling period. Further, each forwarding node device may further determine a deadline for sending an aggregated frame according to a cutoff time gradient and a network setting frame to ensure timeliness of collecting data.
  • the network setting parameter further includes a sampling timing advance, which is used to indicate a sampling time of the node device in one sampling period; correspondingly, the network setting frame generated by the edge router may further include a sampling time advancement. the amount.
  • a sampling timing advance which is used to indicate a sampling time of the node device in one sampling period
  • the network setting frame generated by the edge router may further include a sampling time advancement. the amount.
  • the edge router receives the aggregated frame sent by the cluster head forwarding node device, where the aggregated frame is sent by the first data frame sent by the first node device and the second data frame sent by the second node device only Aggregated, wherein the first node device and the second node device both belong to the Wi-SUN FAN, the first data frame includes a first MAC header and a first MSDU, and the second data frame includes a second MAC header and a second MSDU,
  • the destination MAC address in the first MAC header is the same as the destination MAC address in the second MAC header.
  • the first aggregated frame includes the first aggregated MAC header and the first aggregated MSDU, and the destination MAC address in the first aggregated MAC header is the first.
  • the destination MAC address in the MAC header or the destination MAC address in the second MAC header is the same.
  • the first aggregated MSDU includes a first sub-MSDU and a second sub-MSDU, and the first sub-MSDU includes the first MSDU and the source in the first MAC header.
  • the MAC address, the second sub-MSDU includes the source MAC address in the second MSDU and the second MAC header.
  • the edge router can receive the first aggregation frame sent by the cluster head forwarding node device, and the first aggregation frame is obtained by aggregating the data frames with the same destination MAC address, which helps reduce packet overhead. Reduce the number of channel competitions.
  • the embodiment of the present application provides a first forwarding node device, where the first forwarding node device is applied to a wireless intelligent ubiquitous network Wi-SUN field network FAN, where the Wi-SUN FAN includes the The first forwarding node device, the first node device, and the second node device, the first forwarding node device having a function of implementing the behavior of the first forwarding node device in the frame aggregation method.
  • the functions may be implemented based on hardware, or may be implemented based on hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the structure of the first forwarding node device includes a processor and an interface, and the processor is configured to support the first forwarding node device to perform a corresponding function in the foregoing method.
  • the interface is configured to support communication between the first forwarding node device and the first node device, the second node device, and the second forwarding node device.
  • the first forwarding node device may further include a memory for coupling with the processor, which stores program instructions and data necessary for the first forwarding node device.
  • the first forwarding node device includes: a processor, a receiver, a transmitter, a random access memory, a read only memory, and a bus.
  • the processor is coupled to the receiver, the transmitter, the random access memory, and the read only memory through a bus.
  • the booting is performed by the bootloader booting system in the basic input/output system or the embedded system in the read-only memory, and the first forwarding node device is booted into the normal running state.
  • the application and operating system are run in the random access memory such that the processor performs the method of the first aspect or any possible implementation of the first aspect.
  • the fourth aspect provides a first forwarding node device, where the first forwarding node device includes: a main control board and an interface board, and further includes a switching network board.
  • the first forwarding node device is configured to perform the method in the first aspect or any possible implementation of the first aspect.
  • the first forwarding node device comprises means for performing the method of the first aspect or any possible implementation of the first aspect.
  • a first forwarding node device in a fifth aspect, includes a controller and a first forwarding sub-device.
  • the first forwarding sub-device includes: an interface board, and further, may further include a switching network board.
  • the first forwarding sub-device is configured to perform the function of the interface board in the fourth aspect. Further, the function of the switching network board in the fourth aspect may also be performed.
  • the controller includes a receiver, a processor, a transmitter, a random access memory, a read only memory, and a bus.
  • the processor is coupled to the receiver, the transmitter, the random access memory, and the read only memory through a bus.
  • the booting is started by the solid input/output system in the read-only memory or the bootloader booting system in the embedded system, and the controller is put into a normal running state. After the controller enters a normal operating state, the application and the operating system are run in the random access memory, so that the processor performs the functions of the main control board in the fourth aspect.
  • an embodiment of the present application provides an edge router, which has the function of implementing edge router behavior in the network setting frame sending method.
  • the functions may be implemented based on hardware, or may be implemented based on hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the structure of the edge router includes a processor and an interface, and the processor is configured to support an edge router to perform a corresponding function in the foregoing method.
  • the interface is used to support communication between an edge router and a cluster head forwarding node device.
  • the edge router can also include a memory for coupling with the processor that holds program instructions and data necessary for the edge router.
  • the edge router includes: a processor, a receiver, a transmitter, a random access memory, a read only memory, and a bus.
  • the processor is coupled to the receiver, the transmitter, the random access memory, and the read only memory through a bus.
  • the edge router needs to be run, the basic edge/output system in the read-only memory or the bootloader booting system in the embedded system is booted to boot the edge router into a normal running state.
  • the application and operating system are run in a random access memory such that the processor performs the method of any of the second aspect or any of the possible implementations of the second aspect.
  • the seventh aspect provides an edge router, where the edge router includes: a main control board and an interface board, and further, a switching network board.
  • the edge router is configured to perform the method of any of the second aspect or any of the possible implementations of the second aspect.
  • the edge router comprises means for performing the method of any of the second aspect or any of the possible implementations of the second aspect.
  • an edge router including a controller and a first forwarding sub-device.
  • the first forwarding sub-device includes: an interface board, and further, may further include a switching network board.
  • the first forwarding sub-device is configured to perform the function of the interface board in the seventh aspect. Further, the function of the switching network board in the seventh aspect may also be performed.
  • the controller includes a receiver, a processor, a transmitter, a random access memory, a read only memory, and a bus.
  • the processor is coupled to the receiver, the transmitter, the random access memory, and the read only memory through a bus.
  • the booting is started by the solid input/output system in the read-only memory or the bootloader booting system in the embedded system, and the controller is put into a normal running state. After the controller enters the normal operating state, the application and the operating system are run in the random access memory, so that the processor performs the functions of the main control board in the seventh aspect.
  • a Wi-SUN FAN comprising a first forwarding node device in any of the embodiments described above.
  • a tenth aspect a computer readable storage medium having stored therein computer instructions that, when executed on a computer, cause the computer to perform the method of the first aspect or the second aspect method.
  • FIG. 1 is a schematic diagram of a Wi-SUN FAN application scenario according to an embodiment of the present application
  • FIG. 2 is a schematic structural diagram of a data frame according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of load information elements in a data frame according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of sampling time information elements in a data frame according to an embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart of a frame aggregation method according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of an aggregated frame according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a sub-MSDU according to an embodiment of the present disclosure.
  • FIG. 8 is a second schematic structural diagram of an aggregated frame according to an embodiment of the present disclosure.
  • FIG. 9 is a second schematic structural diagram of a sub-MSDU according to an embodiment of the present disclosure.
  • FIG. 10 is a third schematic structural diagram of a sub-MSDU according to an embodiment of the present disclosure.
  • FIG. 11 is a third schematic structural diagram of an aggregated frame according to an embodiment of the present disclosure.
  • FIG. 12 is a fourth schematic structural diagram of an aggregated frame according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram 5 of an aggregated frame according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of a network setting frame according to an embodiment of the present disclosure.
  • FIG. 15 is a schematic structural diagram of load information elements in a network setting frame according to an embodiment of the present disclosure.
  • FIG. 16 is a schematic structural diagram of a version number information element in a network setting frame according to an embodiment of the present disclosure
  • FIG. 17 is a schematic structural diagram of a frame aggregation information element in a network setting frame according to an embodiment of the present disclosure
  • FIG. 18 is a schematic flowchart of a method for sending a network setting frame according to an embodiment of the present disclosure
  • FIG. 19 is a schematic structural diagram of a first forwarding node device according to an embodiment of the present disclosure.
  • FIG. 20 is a second schematic structural diagram of a first forwarding node device according to an embodiment of the present disclosure.
  • FIG. 21 is a third schematic structural diagram of a first forwarding node device according to an embodiment of the present disclosure.
  • FIG. 22 is a fourth schematic structural diagram of a first forwarding node device according to an embodiment of the present disclosure.
  • FIG. 23 is a schematic structural diagram of an edge router according to an embodiment of the present disclosure.
  • FIG. 24 is a second schematic structural diagram of an edge router according to an embodiment of the present disclosure.
  • 25 is a third schematic structural diagram of an edge router according to an embodiment of the present application.
  • FIG. 26 is a fourth schematic structural diagram of an edge router according to an embodiment of the present disclosure.
  • FIG. 1 exemplarily shows an application scenario of a Wi-SUN FAN.
  • the Wi-SUN FAN includes the node devices in the cluster 1, the cluster 2, the cluster 3, and the cluster 4.
  • the edge router and the router are shown in FIG. 1, the edge router and the router are not in the embodiment of the present application.
  • Wi-SUN FAN in the middle is not in the embodiment of the present application.
  • the cluster head forwarding node device in the cluster 2 is connected to the intermediate forwarding node device in the cluster 1, that is, the cluster 1 is the last hop of the cluster 2; the cluster head forwarding node device in the cluster 3 and the intermediate forwarding node in the cluster 2
  • the device is connected, that is, cluster 2 is the last hop of cluster 3; the cluster head forwarding node device in cluster 1 and cluster 4 is directly connected to the edge router, and the cluster hop count of cluster 1 and cluster 4 can be set to 1, cluster of cluster 2
  • the hop count can be set to 2, the cluster hop count of cluster 3 can be set to 3, or the cluster hop count of cluster 1 and cluster 4 can also be set to 0, then the cluster hop count of cluster 2 can be set to 1, cluster 3
  • the cluster hop count can be set to 2.
  • a smart water meter, an electric meter or an environmental monitoring device (which may be a leaf node device, an intermediate forwarding node device, or a cluster head forwarding node device) usually needs periodicity.
  • the collected data is reported to the network, so that the user can monitor and manage the collected data through the network.
  • Each node collects the collected data in a data frame (that is, a data frame before aggregation) as shown in FIG. 2, and sends the data to the previous node.
  • a data frame that is, a data frame before aggregation
  • the MAC layer header includes a frame control field, a sequence number field, a destination MAC address field, a source MAC address field, an auxiliary security header (AUX security header), and a header information element (header).
  • Information elements header IEs).
  • the frame control is used to provide an information index of the parsing frame; the sequence number field indicates the number set by the node that sends the data frame to the data frame; the destination MAC address indicates the MAC address of the destination device of the data frame; and the auxiliary security header indicates The key required to indicate the decryption of the data frame, for example, the index value of the key; the header information element is used to indicate the type of the data frame and the point in time at which the data frame is sent in the local unicast time slot.
  • the MAC service data unit includes a load information element and a frame load data, where the load information element is used to indicate information such as the length and type of the MSDU, and the frame load data includes data collected by the node.
  • the load information element may be as shown in FIG. 3, including the length of the MSDU, the group identifier, the load information type, the sampling time information element, other load information elements, and the termination load information element.
  • the sampling time information element can be as shown in FIG. 4, including length, ID, type, and sampling time.
  • the FCS field is used to check the data frame. Specifically, the calculation result calculated by the sender according to the preset algorithm on the data frame. After receiving the data frame, the receiver applies the same algorithm to the data frame, if If the calculated result is the same as the received FCS field, the received data frame is considered correct. Otherwise, the receiver considers that the data frame is in error and discards the data frame.
  • each node needs to send the above information through a large number of bytes when transmitting a data frame, and in the case of a large number of nodes transmitting the data frame, multiple channel competition is required, which affects channel resource utilization and system throughput.
  • the embodiment of the present application provides a frame aggregation method, which is applied to a Wi-SUN FAN to implement aggregation of data frames, which helps increase channel resource utilization, reduce the number of times of competition, and improve the system. performance.
  • the frame aggregation method provided by the embodiment of the present application can be applied to the Wi-SUN FAN shown in FIG. 1, but the network structure shown in FIG. 1 does not limit the present application. It should be understood that the scenario applicable to the embodiment of the present application may include more or less clusters than shown in FIG. 1.
  • the cluster head forwarding node device in the next hop may also be the cluster head in the previous hop.
  • the cluster head forwarding node device 2 can be connected to the cluster head forwarding node device 1.
  • the cluster head forwarding node device 3 can be connected to the cluster head forwarding node device 2, which is not limited in this embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a frame aggregation method according to an embodiment of the present disclosure. As shown in the figure, the method may include the following steps:
  • Step 501 The first forwarding node device receives the first data frame sent by the first node device and the second data frame sent by the second node device.
  • the first data frame includes a first MAC header and a first MSDU
  • the second data frame includes a second MAC header and a second MSDU.
  • the format of the first MAC header and the second MAC header may be as shown in FIG. 2, but is not limited to the MAC header shown in FIG. 2 may include, and may include more or less information than the MAC shown in FIG. 2.
  • the MSDU in the data frame includes the reported data. For example, if the first node device is a smart meter, the current power consumption collected by the smart meter is included in the MSDU.
  • the first forwarding node device may be a cluster head forwarding node device, or may be an intermediate forwarding node device, that is, the cluster head forwarding node device and the intermediate forwarding node device may apply to the frame aggregation method provided by the embodiment of the present application.
  • the data frames that are sent are aggregated.
  • the cluster head forwarding node device can be connected to the leaf node device and the intermediate forwarding node device in the cluster, the data frame sent by the leaf node device and the intermediate forwarding node device in the cluster can be received.
  • the first data frame received by the first forwarding node device may be a data frame sent by the leaf node device in the cluster, or may be a data frame sent by the intermediate forwarding node device in the cluster;
  • the frame may be a data frame sent by the leaf node device in the cluster, or may be a data frame sent by the intermediate forwarding node device in the cluster.
  • the cluster head forwarding node device C1 can receive the data frame sent by the intermediate forwarding node device Z1 and the intermediate forwarding node device Z2 in the cluster 1.
  • the intermediate forwarding node device Z1 can receive the data frames sent by the leaf node device Y1 and the leaf node device Y2 and aggregate them; if the cluster head forwarding node device C4 as the first forwarding node device, the cluster head forwarding node device C4 can receive and aggregate the data frames sent by the leaf node device Y10 and the intermediate forwarding node device Z6; if the intermediate forwarding node device Z6 serves as the first forwarding node device, the middle The forwarding node device Z6 can receive and aggregate the data frames transmitted by the leaf node device Y11 and the intermediate forwarding node device Z7. In addition, although not shown in FIG.
  • the cluster head forwarding node device may also be connected to multiple leaf node devices, receive data frames sent by multiple leaf node devices, and aggregate them; intermediate forwarding node devices may also be The intermediate forwarding node device is connected, receives data frames sent by multiple intermediate forwarding node devices, and aggregates them.
  • the first data frame sent by the first node device is usually a data frame that has not been aggregated.
  • the first node device is an intermediate forwarding node device, for example, an intermediate forwarding node device that belongs to the same cluster as the first forwarding node device, the first data frame sent by the first node device may be a data frame that has not been aggregated, or may be Aggregate frames.
  • the intermediate forwarding node device does not have the capability of aggregating data frames
  • the data frame generated by itself or the received data frame sent by other node devices may be forwarded to the first forwarding node device; if the intermediate forwarding node device does not If the intermediate forwarding node device has the aggregation capability, the intermediate forwarding node device can have the aggregation capability, but the intermediate forwarding node device can send the aggregated frame to the first forwarding node device.
  • the received multiple data frames are aggregated and sent to the first forwarding node device.
  • the second node device may be a leaf node device or an intermediate forwarding node device.
  • the second data frame may be an un-aggregated data frame or an aggregated frame, and details are not described herein again.
  • the first node device, or the second node device, or the first node device and the second node device may also belong to different clusters from the first forwarding node device.
  • the intermediate forwarding node device Z2 in FIG. 1 is the first forwarding node device
  • the leaf node device Y3 connected thereto and the intermediate forwarding node device Z2 belong to the same cluster, but the cluster head forwarding node device C2 connected thereto and the intermediate forwarding Node device Z2 belongs to a different cluster.
  • the first node device When the first node device and the first forwarding node device belong to different clusters, the first node device is usually a cluster head forwarding node device in the next hop, such as the intermediate forwarding node device Z2 and the cluster head forwarding node device in FIG. C2. Therefore, the first data frame sent by the first node device may be an aggregated frame. Of course, even if the first node device is a cluster head forwarding node device, and may not have an aggregation function, or has an aggregation function but does not have multiple data frames capable of participating in aggregation at a certain moment, the first node device may also be unaggregated. The data frame is sent to the first forwarding node device.
  • the second data frame sent by the second node device may be an aggregated frame or a data frame that is not aggregated.
  • Step 502 The first forwarding node device determines that the destination MAC address in the first MAC header is the same as the destination MAC address in the second MAC header, and the first forwarding node device generates the first aggregation frame according to the first data frame and the second data frame. .
  • the generated first aggregated frame includes a first aggregated MAC header and a first aggregated MSDU, and the structure of the aggregated frame may be as shown in FIG. 6. It should be understood that, in the embodiment of the present application, the aggregation of two data frames is taken as an example, but the frame aggregation method provided by the present application may also aggregate data frames of more data volume, and the MSDU in the generated aggregation frame may also be used. Includes a larger number of sub-MSDUs.
  • the destination MAC address in the first aggregated MAC header is the same as the destination MAC address in the first MAC header or the destination MAC address in the second MAC header.
  • the first forwarding node device may generate the first aggregation frame, because the destination MAC address in the first MAC address in the first data frame is the same as the destination MAC address in the second MAC address in the second data frame.
  • the destination MAC address is obtained from the first MAC header to generate a destination MAC address in the first aggregated MAC header in the aggregated frame, or the destination MAC address may be obtained from the second MAC header to generate an aggregated frame.
  • each node sends the collected data to the edge router, and then the edge router sends the data to the upper layer application
  • the forwarding node device with the aggregation function may pre-store the destination MAC address, or A template of an aggregated frame is pre-stored, and the template includes a destination MAC address.
  • the destination MAC address is not included in each sub-MSDU, so that multiple MAC addresses of the same destination occupy a large number of bytes, which reduces the packet overhead.
  • the first aggregated MSDU includes a first sub-MSDU and a second sub-MSDU, where the first sub-MSDU includes a first MSDU in the first data frame and a source MAC address in the first MAC header, as shown in FIG. 7;
  • the second sub-MSDU includes a source MAC address in the second MSDU and the second MAC header in the second data frame, similar to the structure shown in FIG.
  • the active MS address and the MSDU included in the data frame before the aggregation are reserved in each sub-MSDU in the aggregation frame, so that the upper layer receiving the aggregation frame can associate the data with the node when acquiring the data reported by each node. Perform data statistics, analysis and management.
  • the first data frame may be an un-aggregated data frame or an aggregated frame
  • the second data frame may also be an un-aggregated data frame or an aggregated frame.
  • the first forwarding node device may be configured according to the second data.
  • the sub-MSDU generated by the frame is added to the first data frame, or the aggregated MAC header may be regenerated, and the sub-MSDU is generated according to the first data frame and the second data frame and is encapsulated into a new aggregated frame.
  • the first data frame is an aggregated frame, and includes a first MAC header and a first MSDU, where the first MSDU further includes a first sub-MSDU and a second sub-MSDU.
  • the second data frame is a data frame that is not aggregated, and includes a second MAC header and a second MSDU.
  • the first aggregated frame generated by the first forwarding node device according to the first data frame and the second data frame may include a first aggregated MAC header and a first aggregated MSDU as shown in the figure.
  • the first aggregated MAC header may be consistent with the first MAC header in the first data frame, and may of course be inconsistent.
  • the first forwarding node device determines the sequence number in the first aggregation frame according to the situation in which the data frame is sent by itself; for example, if the first aggregation MAC header includes the auxiliary security header, Then, the first forwarding node device can determine the secondary security header according to the key itself encrypting the data frame.
  • the first aggregated MSDU includes a first sub-MSDU, a second sub-MSDU, and a third sub-MSDU, where the third sub-MSDU includes a source MAC address in the second MAC header and a second MSDU.
  • the first forwarding node device aggregates data frames having the same destination MAC address, which helps reduce packet overhead and reduce channel competition times.
  • the same sampling period is set for each node, and at the same time or a short period of time, multiple node devices report the data frame and the destination MAC address is the same, that is, the first A forwarding node device can use the frame aggregation method provided in this embodiment to aggregate data frames for multiple data frames, so as to reduce packet overhead and reduce the number of channel competitions.
  • a length field is also included in each sub-MSDU in the aggregated frame, as shown in FIG.
  • the length field is used to indicate the length of each sub-MSDU. Because the data information reported by each node is different, the length of each sub-MSDU may be different. Therefore, the length field is added to each sub-MSDU, and the device that receives the aggregated frame can distinguish the previous sub-MSDU and the next sub-MSDU.
  • the length field can facilitate other devices to distinguish the previous sub-MSDU and the next sub-MSDU when parsing the aggregation frame, but can also distinguish by other means, for example, insert a separator between two sub-MSDUs, or according to Other information identifies the starting or ending position of a sub-MSDU.
  • sampling time of the data may also be included in each sub-MSDU, as shown in FIG. 10, to facilitate the upper layer application to perform statistics and management according to the sampling time and the sampling data.
  • the first sub-MSDU shown in FIG. 10 includes reserved bits for distinguishing the sub-MSDUs. As described above, each sub-MSDU may also have no reserved bits, and distinguish the previous sub-sub-MSDU information according to other information. MSDU and next sub-MSDU.
  • the aggregated MAC header in the aggregated frame may further include one or any combination of the following information: frame control information, a sequence number, an auxiliary security header, and a header information element.
  • frame control information e.g., frame control information
  • a sequence number e.g., a sequence number
  • an auxiliary security header e.g., a header information element
  • a header information element e.g., a header information element that specifies the packet overhead.
  • the structure of the aggregated frame can be as shown in FIG.
  • each node in the Wi-SUN FAN may adopt the same encryption method, that is, The keys indicated by the secondary security header are the same to simplify the decryption process of the first forwarding node device.
  • the first forwarding node device When the first forwarding node device generates an aggregated frame according to each received data frame, the first forwarding node device encrypts the aggregated frame by using the same encryption method as each node device.
  • a physical layer header (PHY header) and/or an FCS may be added to the aggregated frame.
  • the physical layer header and the FCS in the source data frame may not be reserved in each sub-MSDU.
  • the N-1 physical layer headers and the byte overhead of the FCS can be reduced.
  • the information included in the FCS field may be the verification information of the aggregated frame calculated by the preset method in the aggregated frame.
  • the first forwarding node device may also only collect data frames that are collected and sent in the same sampling period.
  • the sampling time information element may also be added to the aggregation frame, as shown in FIG.
  • the sampling time information element can no longer be reserved in each sub-MSDU to further reduce the byte overhead.
  • the aggregated information element may also include other load information element termination load information elements, and the other load information elements and the termination load information element may not be reserved in each sub-MSDU to further reduce the byte overhead.
  • the first forwarding node device starts to generate the first aggregation frame after receiving the first data frame and the second data frame, and may also report the time of the data frame before the scheduled first forwarding node device, and then according to the A data frame and a second data frame generate a first aggregated frame.
  • multiple environmental monitoring devices periodically report monitoring data
  • the destination MAC address of the data frames is an edge router or other preset address
  • the first forwarding node device may also receive the first data.
  • the first data frame is initially encapsulated.
  • the first forwarding node device generates an aggregated frame according to the first data frame and the second data frame, but the frame aggregation method provided by the present application may also aggregate data frames of more data.
  • the more the number of data frames participating in the aggregation the more the reduced message overhead, and the more the number of reduced channel competitions.
  • the greater the number of data frames participating in the aggregation the longer the length of the formed aggregated frame. If the length of the aggregated frame is too long, a transmission error may occur.
  • an upper limit can be set on the length of the aggregated frame. For example, if the maximum length of the physical layer in the Wi-SUN FAN can support a frame length of 2047 bytes, 2047 bytes can be used as the aggregate frame length. Upper limit.
  • the first forwarding node device When generating the aggregated data frame according to the multiple data frames, the first forwarding node device generates one sub-MSDU according to each of the data frames participating in the aggregation, in order according to the received time sequence.
  • the first forwarding node may determine whether the length of the aggregated frame exceeds a preset amount if the sub-MSDU is generated according to the data frame and is encapsulated into the aggregated frame. The upper limit, if not exceeded, continues to be aggregated and encapsulated. Otherwise, the new sub-MSDU is not aggregated and encapsulated in the aggregated frame, and a new aggregated frame is generated according to the data frame that has not participated in the aggregated encapsulation.
  • the first forwarding node device may also need to report data.
  • the first forwarding node device may generate a data frame, and then generate a sub-MSDU according to the generated data frame and aggregate and encapsulate the data into an aggregation frame, or A forwarding node device may also generate a sub-MSDU according to the data to be reported and aggregate and encapsulate the packet into an aggregated frame.
  • Step 503 The first forwarding node device sends a first aggregation frame to the second forwarding node device.
  • the first forwarding node device is an intermediate forwarding node device (such as an intermediate forwarding node device), and the second forwarding receiving device may be a cluster head forwarding node device in a cluster where the first forwarding node device is located, or The second forwarding node device may also be an intermediate forwarding device in the cluster where the first forwarding node device is located.
  • the intermediate forwarding node device Z1 shown in FIG. 1 is the first forwarding node device
  • the second forwarding node device is the cluster head forwarding node device C1; if the intermediate forwarding node device Z7 shown in FIG. 1 is the first forwarding node The device, the second forwarding node device is an intermediate forwarding node device Z6.
  • the first forwarding node device is a cluster head forwarding node device
  • the second forwarding node device is an intermediate forwarding node device or a cluster head forwarding node device
  • the first forwarding node device and the second forwarding node Devices belong to different clusters.
  • the cluster head forwarding node device C2 in the cluster 2 shown in FIG. 1 is the first forwarding node device
  • the second forwarding node device is the intermediate forwarding node device Z2 in the cluster 1.
  • the cluster head forwarding node device C2 in the cluster 2 can also be connected to the cluster head forwarding node device C1 in the cluster 1. In this case, if the cluster head forwarding node device C2 is the first forwarding node device, the second forwarding node The device is a cluster head forwarding node device C1.
  • the first forwarding node device is a cluster head forwarding node device
  • the second forwarding node device is an edge router, but the edge router is located outside the Wi-SUN FAN.
  • the cluster head forwarding node device C1 shown in FIG. 1 is the first forwarding node device
  • the second forwarding node device is an edge router.
  • the first forwarding node device Since the first forwarding node device generates an aggregated frame according to the received multiple data frames, in order to reduce the packet overhead, reduce the number of channel competitions, and fully utilize the channel resources, it may be necessary to wait for a period of time to receive more Data frames that can participate in aggregation and aggregate them. However, in order to ensure the timeliness of the data, the first forwarding node device may be configured to set a deadline for sending the aggregated frame, so that the first forwarding node device does not delay the data collected by each node device to be uploaded to the upper layer in time. application.
  • the first forwarding node device may further receive a network setting frame from the edge router, where the network setting frame is used to indicate a time when the first forwarding node device reports the first aggregation frame, and the first node device and the second The time at which the node device collects data.
  • the network setting frame is generated by the edge router, and is sent down through the node devices. Still taking FIG. 1 as an example, the edge router sends the network setup frame to the cluster head forwarding node device C1 and the cluster head forwarding node device C4, and the cluster head forwarding node device C1 sends the network setting frame to the routing forwarding node device Z1 and the routing forwarding node.
  • the routing forwarding node device Z1 forwards the network setting frame to the leaf node device Y1 and the leaf node device Y2, and the routing forwarding node device Z2 forwards the network setting frame to the leaf node device Y3 and the cluster head forwarding node device C2, and so on. .
  • the first forwarding node device determines, according to the received network setting frame, a deadline for reporting the first aggregation frame, and according to the deadline, the second forwarding node device sends the first aggregation frame.
  • the cutoff time may be set only for the cluster head forwarding node device, and the deadline is not set for the routing forwarding node device.
  • the cutoff time may also be set for the cluster head forwarding node device and the routing forwarding node device.
  • the following is an example of setting the deadline for the cluster head forwarding node device only.
  • the network setting frame includes: a network setting time stamp t c , a cluster hop count i, and a sampling period P.
  • the sampling period P is used to indicate that each node device (which may include a leaf node device, an intermediate forwarding node device, and a cluster head forwarding node device) collects data according to a sampling period and reports the data.
  • each node device collects data and reports it every sampling period, and the cluster head forwarding node device and/or the intermediate forwarding node device aggregates data frames and upwards in each sampling period. Send the aggregated data frame.
  • the sampling period of a node device under the control of an application is the same. For example, the period of reporting power consumption by each smart meter is the same, and the period of reporting environmental parameters by each environmental monitoring device is the same.
  • the network setting timestamp t c is used to determine the reference time of the sampling period.
  • the sampling period is 60 s
  • t c ⁇ t c +60 s is the first sampling period
  • t c +60 s to t c +120 s is the first Two sampling periods, and so on.
  • the edge router may use the sending time as the network setting timestamp t c , so that each node device determines the sampling period according to the network setting time stamp, and each cluster head forwarding node device forwards in the middle.
  • a node or a leaf node device setting frame forwarding network device or an intermediate node forwarding device forwards the network node device provided forward frame to a leaf node or the next hop cluster head device, without changing the network setting timestamps t c, so that each node
  • the device has a uniform sampling period and sampling time.
  • the cluster hop count i represents the hop count of the cluster where the edge router of the network setting frame is sent to the destination node device.
  • the cluster hop count of each node device in cluster 1 and cluster 4 can be set to 1, and the cluster hop count of each node device in cluster 2 can be set to 2, cluster.
  • the number of cluster hops of each node device in 3 may be set to 3; or, the number of cluster hops of each node device in cluster 1 and cluster 4 may be set to 0, and the cluster hop count of each node device in cluster 2 may be set to 1.
  • the number of cluster hops of each node device in cluster 3 can be set to 2.
  • the cluster head forwarding node device can obtain the first time according to the network setting time stamp t c and the sampling period P, and obtain the cutoff time by going to the i deadline time gradient ⁇ D in the first time.
  • the deadline gradient ⁇ D is used to indicate the time when the cluster head forwarding node device sends the aggregated frame to the forwarding node device outside the cluster where the cluster head forwarding node device is located. For example, if the network architecture diagram shown in FIG.
  • the cut-off time for the cluster head forwarding node device C1 to send the aggregated frame is T1
  • the cutoff time gradient ⁇ D may be included in the network setting frame, or may be pre-configured in the first forwarding node device.
  • the cluster head forwarding node device may determine, according to formula (1), a cutoff time D(i) of the cluster head forwarding node device to send an aggregated frame.
  • n is the sequence number of the sampling period.
  • the above n may be calculated by the cluster head forwarding node device.
  • the cluster head forwarding node device may determine the current sampling period sequence number n according to formula (2).
  • t is the current time
  • t c is the network setting timestamp
  • P is the sampling period
  • the cluster head forwarding node device may also determine the sampling period sequence number by other means.
  • the cluster head forwarding node device may be used to indicate a parameter for storing the sampling frequency, and the value of the parameter is +1 every time one sampling period passes. This application does not limit how to determine the sampling period number n.
  • the network setting frame may further include a sampling time advance amount for indicating a sampling time of each node device in one sampling period.
  • each node device may determine the sampling time according to formula (3).
  • t s represents the sampling time of the node device
  • n represents the sequence number of the sampling period
  • P represents the sampling period
  • ⁇ T represents the sampling time advance amount
  • t c represents the network setup timestamp. For example, if the sampling period is 60s, the sampling time advance is 1s, and the network setting timestamp is 0.
  • each node performs the first sampling at (0+1*60-1)s, at (0+2). *60-1)s the second sampling, and so on.
  • the method for determining the value of n by each node is similar to the method for determining the value of n by the cluster head forwarding node device, and details are not described herein again.
  • the structure of the network setup frame may be as shown in FIG. 14, including a MAC layer header, a MAC layer payload, and an FCS.
  • the MAC layer header may further include a frame control field, a personal area network identifier, a source MAC address, a load security header, and a header information element.
  • the load information element field in FIG. 14 may specifically include information as shown in FIG. 15, wherein the version number information element (PAN version IE) field and the frame aggregation information element (FAGG IE) field may be respectively as shown in FIG. 16 and Figure 17 shows.
  • the cluster hop count of each node device in cluster 1 and cluster 4 is 1, the cluster hop count of each node device in cluster 2 is 2, and the cluster hop count of each node device in cluster 3 is 3.
  • the initial value of the number of cluster hops in the network setting frame sent by the edge router may be 1, and the cluster head forwarding node device C1 determines its own deadline according to the network setting frame sent by the edge router, and forwards the network setting frame to For other node devices, the number of cluster hops in the network setting frame is +1, so that the cluster head forwarding node device C2 can calculate its corresponding deadline according to the modified network setting frame, and for each node device in the cluster 1.
  • the other node devices are not affected by the change in the number of cluster hops.
  • the cluster hop count is +1, so that the cluster head forwarding node device C3 can calculate its corresponding deadline according to the modified network setting frame.
  • the cluster hop count of each node device in cluster 1 and cluster 4 is 1, the cluster hop count of each node device in cluster 2 is 2, and the cluster hop count of each node device in cluster 3 is 3, the initial value of the cluster hop count in the network setting frame sent by the edge router may be 0, and the cluster head forwarding node device C1 first sets the cluster hop count in the network setting frame to +1, and then calculates the deadline, and the network is The set frame is forwarded to the intermediate forwarding node device Z1 and the intermediate forwarding node device Z2, and the intermediate forwarding node device Z2 forwards the network setting frame to the cluster head forwarding node device C2; the cluster head forwarding node device C2 first sets the cluster hop count in the network setting frame. +1, then calculate the deadline, and so on.
  • the cluster hop count of each node device in the cluster 1 and the cluster 4 is 0, the cluster hop count of each node device in the cluster 2 is 1, and the cluster of each node device in the cluster 3 is The number of hops is 2.
  • the user sets the network setting parameters through the upper application: the sampling period is 60s, the cutoff time gradient is 0.1s, and the sampling time advance is 1s.
  • the upper layer application sends the above network setting parameters to the edge router through the network, and the edge router generates a network setting frame, where the network setting frame includes the following information: network setting timestamp 0s, sampling period is 60s, deadline gradient is 0.1s, sampling time The advance amount is 1 s and the cluster hop count is 1.
  • the routing forwarding node device Z2 forwards the network setting frame to the cluster head forwarding node device C2, and the cluster head forwarding node device C2 calculates and sends according to the network setting frame.
  • FIG. 18 is a schematic flowchart of a method for sending a network setting frame according to an embodiment of the present disclosure. As shown in the figure, the method may include the following steps:
  • Step 1801 The edge router acquires network setting parameters.
  • the network setting parameters acquired by the edge router may be sent by the network.
  • the administrator can configure network setup parameters in the upper application and send them to the edge router over the network.
  • the network setting parameter may include a sampling period P, which is used to instruct the node device to collect data and report the data according to the sampling period.
  • the network setting parameter may further include a cutoff time gradient ⁇ D.
  • the deadline gradients are the same in the same Wi-SUN FAN for ease of management.
  • the administrator can set the sampling period and the deadline gradient in the upper application and send it to the edge router through the network.
  • the administrator can set different sampling periods and deadline gradients according to different application scenarios.
  • the sampling period of the smart meter can be set to 1 month to facilitate the statistics of the user's power consumption and electricity costs; for example, environmental monitoring can be set.
  • the sampling period of the device is 1 hour to facilitate monitoring of environmental conditions.
  • the network setting parameter may further include a sampling time advance amount for indicating a sampling time of the node device in one sampling period. For example, if the sampling period is 60s and the sampling time advance is 1s, it means that each node device collects data in the (60-1)s in each cycle and reports it.
  • Step 1802 The edge router generates a network setting frame according to the network setting parameter.
  • the network setting frame includes a network setting time stamp t c , a cluster hop count i, and a sampling period.
  • the meaning of the network setting timestamp t c and the number of cluster hops is similar to the foregoing method, and details are not described herein again.
  • the network setting parameter may further include a cutoff time gradient ⁇ D and/or a sampling time advance amount.
  • the network setting frame generated by the edge router may further include a cutoff time gradient ⁇ D and/or a sampling time advance amount.
  • Step 1803 The edge router sends a network setting frame to the cluster head forwarding node device.
  • the edge router may be connected to one or more cluster head forwarding node devices.
  • the edge router may send the network setting frame to the cluster head forwarding node device connected to the edge router, and the cluster head forwarding node device further sets the network setting frame. Sending to the leaf node device connected to it, the intermediate forwarding node device, or the cluster head forwarding node device in other clusters, thereby transmitting the network setting frame to each node device in the Wi-SUN FAN.
  • the initial cluster hop count set by the edge router is 1, and the edge router sends the network setup frame to the cluster head forwarding node device C1 and the cluster head forwarding node device in the cluster 4 as shown in FIG. 1 .
  • the intermediate forwarding node device Z2 sends the network setting frame to the cluster head forwarding node device C2, and the cluster head forwarding node device C2 modifies the cluster hop count in the network setting frame to 3 and forwards it to the intermediate forwarding node device Z3 and the intermediate forwarding node device Z4.
  • the leaf node device Y4, the intermediate forwarding node device Z4 sends the network setting frame to the cluster head forwarding node device C3.
  • the initial cluster hop count set by the edge router is 0, and the edge router sends the network setup frame to the cluster head forwarding node device C1 and the cluster head forwarding node in the cluster 4 as shown in FIG. 1 .
  • the cluster head forwarding node device C2 modifies the cluster hop count to +1, and forwards the modified network setting frame to the intermediate forwarding node device Z3, the intermediate forwarding node device Z4, and the leaf node device Y4, and the intermediate forwarding node device Z4 sends the network setting frame.
  • the node head device C3 is forwarded to the cluster head.
  • the cluster head forwarding node device C3 modifies the cluster hop count to +1 and forwards the modified network setting frame to the intermediate forwarding node device Z5 and the leaf node device Y7.
  • the edge router may add a version number in the network setting frame to facilitate each node to determine the updated network setting frame. For example, each time the edge router receives a new network setting parameter, it regenerates the network setting frame according to the new network setting parameter, and sets the version number in the network setting frame to +1; each node sets the frame according to the network with the largest version number. The sampling period, the deadline for sending the aggregated frame, and the like are determined, or each node can delete the network setting frame with a smaller version number, and only the network setting frame with the largest version number. For another example, the edge router may also generate a version number according to the time when the network setting frame is generated, and each node determines the network setting frame with the latest time as the latest version of the network setting frame.
  • the format of the network setting frame may be as shown in FIG. 14 to FIG. 17 , and details are not described herein again.
  • the embodiment of the present application further provides a first forwarding node device, which is used to implement the foregoing frame aggregation method embodiment.
  • the first forwarding node device may be applied to a Wi-SUN FAN, where the Wi-SUN FAN includes a first forwarding node device, a first node device, and a second node device.
  • the first forwarding node device may include a receiving unit 1901, a determining unit 1902, a generating unit 1903, and a transmitting unit 1904.
  • the receiving unit 1901 is configured to receive a first data frame sent by the first node device and a second data frame sent by the second node device, where the first data frame includes a first MAC header and a first MSDU, and the second data frame includes The second MAC header and the second MSDU.
  • the determining unit 1902 is configured to determine whether the destination MAC address in the first MAC header is the same as the destination MAC address in the second MAC header.
  • the generating unit 1903 is configured to generate, by the device, the first aggregated frame according to the first data frame and the second data frame, where An aggregated frame includes a first aggregated MAC header and a first aggregated MSDU, and the destination MAC address in the first aggregated MAC header is the same as the destination MAC address in the first MAC header or the destination MAC address in the second MAC header, the first aggregation
  • the MSDU includes a first sub-MSDU and a second sub-MSDU, where the first sub-MSDU includes a source MAC address in the first MSDU and the first MAC header, and the second sub-MSDU includes a source MAC address in the second MSDU and the second MAC header;
  • the sending unit 1904 is configured to send the first aggregation frame to the second forwarding node device.
  • the first node device is a leaf node device or an intermediate forwarding node device
  • the second node device is a leaf node device or an intermediate forwarding node device, the first node device, the second node device, and the first forwarding
  • the node device belongs to the first cluster
  • the Wi-SUN FAN includes the first cluster.
  • the first data frame is a data frame or an aggregate frame.
  • the second data frame is a data frame or an aggregate frame.
  • the first node device is a cluster head forwarding node device
  • the first data frame is an aggregation frame
  • the second node device and the first forwarding node device belong to the first cluster
  • the first node device belongs to the second The cluster
  • the Wi-SUN FAN includes a first cluster and a second cluster
  • the first cluster and the second cluster are not the same cluster.
  • the first forwarding node device is an intermediate forwarding node device
  • the second forwarding node device is a cluster head forwarding node device or an intermediate forwarding node device
  • the first forwarding node device is the same as the second forwarding node device.
  • the Wi-SUN FAN includes the second forwarding node device.
  • the first forwarding node device is a cluster head forwarding node device
  • the second forwarding node device is an intermediate forwarding node device or a cluster head forwarding node device, where the first forwarding node device and the second forwarding node device are Among different clusters
  • the Wi-SUN FAN includes the second forwarding node device.
  • the first forwarding node device is a cluster head forwarding node device
  • the second forwarding node device is an edge router
  • the edge router is located outside the Wi-SUN FAN.
  • the first forwarding node device is a cluster head forwarding node device
  • the receiving unit 1901 is further configured to receive a network setting frame from the edge router, where the network setting frame is used to indicate that the first forwarding node device reports the first The time of the aggregated frame, the data acquisition time of the first node device and the second node device.
  • the determining unit 1902 is further configured to determine, according to the network setting frame, a deadline for reporting the first aggregated frame.
  • the sending unit 1904 is specifically configured to: send the first aggregation frame to the second forwarding node device according to the deadline.
  • the network setting frame includes a network setting timestamp, a cluster hop count, and a sampling period, where the network setting timestamp is used to determine a reference time of a sampling period, where the cluster hop number represents a sending station And the hop count of the cluster of the network setting frame to the destination node device, where the sampling period is used to indicate that the first node device and the second node device collect data according to the sampling period.
  • the determining unit 1902 is configured to: obtain a first time according to the network setting time stamp and the sampling period, and determine to remove the deadline for the first aggregation frame according to the network setting frame;
  • the cluster hops a plurality of cutoff time gradients to obtain the cutoff time, wherein the cutoff time gradient is used to instruct the first forwarding node device to send the first aggregated frame to the first forwarding node device The time of forwarding the node device outside the cluster; adding 1 to the cluster hop count in the network setting frame.
  • the first sub-MSDU and the second sub-MSDU each include a length field, where the length field is used to indicate the length of the sub-MSDU.
  • the embodiment of the present application further provides a first forwarding node device, which is used to implement the foregoing frame aggregation method embodiment.
  • the first forwarding node device may be applied to a Wi-SUN FAN, where the Wi-SUN FAN includes a first forwarding node device, a first node device, and a second node device.
  • FIG. 20 is a schematic structural diagram of hardware of a first forwarding node device according to an embodiment of the present disclosure.
  • the first forwarding node device may include a processor 2001, a memory 2002, an interface 2003, and a bus 2004.
  • the interface 2003 may be wireless or wired. Implementation, specifically, it can be a network card.
  • the above processor 2001, memory 2002 and interface 2003 are connected by a bus 2004.
  • the interface 2003 may specifically include a transmitter and a receiver, and the information is sent and received between the first forwarding node device and the first node device, the second node device, and the second forwarding node device in the foregoing embodiment.
  • the interface 2003 is used to support steps 501 and 503 in FIG.
  • the processor 2001 is configured to perform processing performed by the first forwarding node device in the above embodiment.
  • the processor 2001 is configured to support step 502 in FIG.
  • the memory 2002 includes an operating system 20021 and an application 20022 for storing programs, code or instructions that, when executed by a processor or a hardware device, can perform the processing involved in the first forwarding node device in the method embodiments.
  • the memory 2002 may include a read-only memory (ROM) and a random access memory (RAM).
  • the ROM includes a basic input/output system (BIOS) or an embedded system;
  • the RAM includes an application and an operating system.
  • BIOS basic input/output system
  • the first forwarding node device needs to be run, booting is performed by the BIOS in the ROM or the bootloader booting system in the embedded system, and the first forwarding node device is booted into a normal running state. After the first forwarding node device enters the normal running state, the application program and the operating system running in the RAM are executed, thereby completing the processing procedure involving the first forwarding node device in the method embodiment.
  • Figure 20 only shows a simplified design of the first forwarding node device.
  • the first forwarding node device can include any number of interfaces, processors or memories.
  • FIG. 21 is a schematic structural diagram of hardware of another first forwarding node device according to an embodiment of the present application.
  • the first forwarding node device shown in FIG. 21 can perform the corresponding steps performed by the first forwarding node device in the foregoing frame aggregation method embodiment.
  • the first forwarding node device includes: a main control board 2110, an interface board 2130, a switching network board 2120, and an interface board 2140.
  • the main control board 2110, the interface boards 2130 and 2140, and the switching network board 2120 are connected to each other through the system bus to implement interworking.
  • the main control board 2110 is used to complete functions such as system management, device maintenance, and protocol processing.
  • the switching network board 2120 is used to complete data exchange between each interface board (also referred to as a line card or a service board).
  • the interface boards 2130 and 2140 are used to provide various service interfaces and implement forwarding of data packets.
  • the interface board 2130 may include a central processor 2131, a forwarding entry storage 2134, a physical interface card 2133, and a network processor 2132.
  • the central processing unit 2131 is configured to control and manage the interface board and communicate with the central processing unit on the main control board.
  • the forwarding entry storage 2134 is used to save forwarding entries.
  • the physical interface card 2133 is used to complete the reception and transmission of data frames.
  • the network storage 2132 is configured to control the physical interface card 2133 to send and receive data frames according to the forwarding entry.
  • the physical interface card 2133 receives the first data frame and the second data frame, and transmits the first data frame and the second data frame to the central processing unit 2111 on the main control board 2110 via the central processing unit 2131.
  • the central processing unit 2111 is configured to acquire the first data frame and the second data frame and generate a first aggregated frame.
  • the physical interface card 2133 is further configured to send the first aggregated frame to the second forwarding node device.
  • the central processing unit 2131 is further configured to control the network storage 2132 to obtain the forwarding entry in the forwarding entry storage 2134, and the central processing unit 2131 is further configured to control the network storage 2132 to complete the receiving and transmitting of the data frame via the physical interface card 2133.
  • the operation on the interface board 2140 in the embodiment of the present invention is consistent with the operation of the interface board 2130, and details are not described herein for brevity.
  • the first forwarding node device in this embodiment may correspond to the functions and/or various steps implemented in the foregoing frame aggregation method embodiment, and details are not described herein again.
  • the main control board may have one or more blocks, and when there are multiple blocks, the main control board and the standby main control board may be included.
  • the interface board may have one or more blocks. The stronger the data processing capability of the first forwarding node device, the more interface boards are provided.
  • the physical interface card on the interface board can also have one or more blocks.
  • the switching network board may not exist, and there may be one or more blocks. When there are multiple blocks, the load sharing redundant backup can be implemented together.
  • the first forwarding node device does not need to exchange the network board, and the interface board assumes the processing function of the service data of the entire system.
  • the first forwarding node device may have at least one switching network board, and implement data exchange between multiple interface boards through the switching network board to provide large-capacity data exchange and processing capability. Therefore, the data forwarding and processing capability of the first forwarding node device of the distributed architecture is greater than that of the centralized architecture device. Which architecture is used depends on the specific network deployment scenario, and is not limited here.
  • FIG. 22 is a schematic structural diagram of hardware of another first forwarding node device according to an embodiment of the present disclosure.
  • the first forwarding node device shown in FIG. 22 can perform the corresponding steps performed by the first forwarding node device in the method of the foregoing embodiment.
  • This product form of the first forwarding node device is applicable to a network architecture (eg, software defined network (SDN)) that is separate based on control and forwarding.
  • SDN software defined network
  • the main control board 2110 of the first forwarding node device shown in FIG. 21 is separated from the device to form a new independent physical device (ie, the controller 2110A as shown in FIG. 22), and the remaining formation is performed.
  • Another independent physical device ie, the first forwarding sub-device 2100A as shown in FIG. 22).
  • the controller 2110A interacts with the first forwarding sub-device 2100A through a control channel protocol.
  • the control channel protocol may be an open flow protocol, a path computation element communication protocol (PCEP), a border gateway protocol (BGP), or an interface to the routing system (I2RS). Wait. That is to say, compared with the embodiment corresponding to FIG. 21 above, the first forwarding node device in this implementation includes the separated controller 2110A and the first forwarding sub-device 2100A.
  • PCEP path computation element communication protocol
  • BGP border gateway protocol
  • I2RS interface to the routing system
  • the controller 2110A may be implemented based on a general-purpose physical server or a dedicated hardware structure.
  • the controller includes a receiver, a processor, a transmitter, a RAM, a ROM, and a bus (not shown in the figure). ).
  • the processor is coupled to the receiver, the transmitter, the RAM, and the ROM through a bus.
  • the BIOS is booted in the ROM or the bootloader booting system in the embedded system to boot, and the controller is put into a normal running state. After the controller enters the normal running state, the application and the operating system are run in the RAM, so that the processor performs all the functions and steps of the main control board 2110 in FIG. 21 described above.
  • the first forwarding sub-device 2100A may be implemented based on a dedicated hardware structure, and its function and structure are consistent with the functions and structures of the interface board 2130, the interface board 2140, and the switching network board 2120 in FIG. 21 described above, and perform corresponding functions and steps. . It may also be a virtual first forwarding sub-device implemented based on a universal physical server and a network function virtualization (NFV) technology, and the virtual first forwarding sub-device is a virtual router. In the scenario of the virtual first forwarding sub-device, the first forwarding sub-device mentioned in the foregoing first forwarding sub-device embodiment includes an interface board, a switching network board, and the processor can be considered as being based on the virtual environment.
  • NFV network function virtualization
  • the general physical server allocates interface resources, network resources, and processing resources used by the virtual first forwarding sub-device.
  • the function or the step of implementing the first forwarding sub-device by using the general physical server, or the function or the step of implementing the first forwarding sub-device by using the NFV technology, may refer to the embodiment of FIG. 20 .
  • controller 2110A and the first forwarding sub-device 2100A in the first forwarding node device may implement various functions and steps implemented by the first forwarding node device in the method embodiment. This will not be repeated here.
  • an edge router which is used to implement the foregoing network setting frame sending method embodiment.
  • an edge router provided by an embodiment of the present application may include an obtaining unit 2301, a generating unit 2302, and a sending unit 2303.
  • the acquiring unit 2301 is configured to acquire a network setting parameter, where the network setting parameter includes a sampling period, where the sampling period is used to instruct the node device to collect data according to the sampling period.
  • the generating unit 2302 is configured to generate a network setting frame according to the network setting parameter, where the network setting frame includes a network setting time stamp, a cluster hop count, and the sampling period, where the network setting time stamp is used to determine a reference of a sampling period Time, the cluster hop count represents the hop count of the cluster where the edge router of the network setting frame is sent to the destination node device.
  • the sending unit 2303 is configured to send, to the cluster head forwarding node device, the network setting frame, where the cluster head forwarding node device is located in a first cluster in the Wi-SUN FAN, and the first cluster forwards the node device via the cluster head Communicating with the edge router.
  • the network setting parameter further includes a sampling time advance amount, where the sampling time advance amount is used to indicate a sampling time of the node device in one sampling period; The sampling time advance amount.
  • the obtaining unit 2301 is further configured to: receive, by the edge router, an aggregated frame sent by the cluster head forwarding node device.
  • the aggregated frame is obtained by aggregating the first data frame sent by the first node device and the second data frame sent by the second node device, where the first node device and the second node device belong to the Wi -SUN FAN, the first data frame includes a first medium access control MAC header and a first MAC service data unit MSDU, and the second data frame includes a second MAC header and a second MSDU, where the first MAC header is The destination MAC address is the same as the destination MAC address in the second MAC header, and the first aggregated frame includes a first aggregated MAC header and a first aggregated MSDU, and the destination MAC address in the first aggregated MAC header is The destination MAC address in the first MAC header or the destination MAC address in the second MAC header is the same, the first aggregated MSDU includes a first sub-MSDU and a second sub-
  • the embodiment of the present application further provides an edge router, which is used to implement the foregoing network setting frame sending method embodiment.
  • FIG. 24 is a schematic diagram of a hardware structure of an edge router according to an embodiment of the present disclosure.
  • the edge router may include a processor 2401, a memory 2402, an interface 2403, and a bus 2404.
  • the interface 2403 may be implemented by using a wireless or a wired manner. It is a network card.
  • the above processor 2401, memory 2402, and interface 2403 are connected by a bus 2404.
  • the interface 2403 may specifically include a transmitter and a receiver for transmitting and receiving information between the edge router and the cluster head forwarding node device in the foregoing embodiment.
  • the processor 2401 is configured to perform processing performed by an edge router in the above embodiment.
  • the memory 2402 includes an operating system 24021 and an application program 24022 for storing programs, codes, or instructions that can be executed when a processor or a hardware device executes the programs, codes, or instructions.
  • the memory 2402 can include a ROM and a RAM.
  • the ROM includes a BIOS or an embedded system; the RAM includes an application and an operating system.
  • booting is performed by booting the BIOS in the ROM or the bootloader booting system in the embedded system to boot the edge router into normal operation.
  • the application and the operating system running in the RAM are executed, thereby completing the processing involving the edge router in the method embodiment.
  • Figure 24 only shows a simplified design of the edge router.
  • an edge router can contain any number of interfaces, processors or memories.
  • FIG. 25 is a schematic structural diagram of hardware of another edge router according to an embodiment of the present application.
  • the edge router shown in FIG. 25 can perform the corresponding steps performed by the edge router in the above embodiment of the network setting frame transmission method.
  • the edge router includes: a main control board 2510, an interface board 2530, a switching network board 2520, and an interface board 2540.
  • the main control board 2510, the interface boards 2530 and 2540, and the switching network board 2520 are connected to each other through the system bus to implement interworking.
  • the main control board 2510 is used to complete functions such as system management, device maintenance, and protocol processing.
  • the switching network board 2520 is used to complete data exchange between each interface board (also called a line card or a service board).
  • Interface boards 2530 and 2540 are used to provide various service interfaces and implement forwarding of data packets.
  • the interface board 2530 can include a central processor 2531, a forwarding entry storage 2534, a physical interface card 2533, and a network processor 2532.
  • the central processing unit 2531 is configured to control and manage the interface board and communicate with the central processing unit on the main control board.
  • the forwarding entry storage 2534 is used to save forwarding entries.
  • the physical interface card 2533 is used to complete network setup frame transmission and aggregate frame reception.
  • the network storage 2532 is configured to control the physical interface card 2133 to send and receive network setting frames or aggregated frames according to the forwarding entry.
  • the physical interface card 2533 can receive network setting parameters from the upper layer application and send the network setting parameters to the central processing unit 2511 on the main control board 2510 via the central processing unit 2531.
  • the central processing unit 2511 is configured to acquire network setting parameters and generate a network setting frame.
  • the physical interface card 2533 is further configured to send a network setting frame to the cluster head forwarding node device.
  • the central processing unit 2531 is further configured to control the network storage 2532 to obtain forwarding entries in the forwarding entry storage 2534, and the central processing unit 2531 is further configured to control the network storage 2532 to complete reception and transmission of data frames via the physical interface card 2533.
  • the operation on the interface board 2540 in the embodiment of the present invention is consistent with the operation of the interface board 2530, and details are not described herein for brevity. It should be understood that the edge router of this embodiment may correspond to the functions and/or various steps of the foregoing network configuration sending method embodiment, and details are not described herein again.
  • the main control board may have one or more blocks, and when there are multiple blocks, the main control board and the standby main control board may be included.
  • the interface board may have one or more blocks. The stronger the data processing capability of the edge router, the more interface boards are provided.
  • the physical interface card on the interface board can also have one or more blocks.
  • the switching network board may not exist, and there may be one or more blocks. When there are multiple blocks, the load sharing redundant backup can be implemented together.
  • the edge router does not need to exchange the network board, and the interface board handles the processing function of the service data of the entire system.
  • an edge router can have at least one switching network board, and exchange data between multiple interface boards through the switching network board to provide large-capacity data exchange and processing capabilities. Therefore, distributed routers have more data access and processing capabilities than centralized architecture devices. Which architecture is used depends on the specific network deployment scenario, and is not limited here.
  • FIG. 26 is a schematic structural diagram of hardware of another edge router according to an embodiment of the present disclosure.
  • the edge router shown in FIG. 26 can perform the corresponding steps performed by the edge router in the method of the above embodiment.
  • This product form of the edge router is suitable for a network architecture based on control and forwarding separation (for example, software defined network (SDN)).
  • SDN software defined network
  • the main control board 2510 of the edge router shown in FIG. 25 is separated from the device to form a new independent physical device (ie, the controller 2510A as shown in FIG. 26), and the remaining forms another independent.
  • Physical device ie, first forwarding sub-device 2500A as shown in FIG. 26).
  • Controller 2510A interacts with edge router 2500A through a control channel protocol.
  • the control channel protocol can be OpenFlow Protocol, PCEP, BGP, I2RS, and the like. That is, the edge router in the present embodiment includes the separated controller 2510A and the first forwarding sub-device 2500A as compared with the embodiment corresponding to FIG. 25 described above.
  • the controller 2510A may be implemented based on a general-purpose physical server or a dedicated hardware structure.
  • the controller includes a receiver, a processor, a transmitter, a RAM, a ROM, and a bus (not shown in the figure). ).
  • the processor is coupled to the receiver, the transmitter, the RAM, and the ROM through a bus.
  • the BIOS is booted in the ROM or the bootloader booting system in the embedded system to boot, and the controller is put into a normal running state. After the controller enters the normal operating state, the application and operating system are run in RAM, causing the processor to perform all of the functions and steps of the main control board 2510 of FIG. 25 described above.
  • the first forwarding sub-device 2500A may be implemented based on a dedicated hardware structure, and its function and structure are consistent with the functions and structures of the interface board 2530, the interface board 2540, and the switching network board 2520 in FIG. 25 described above, and perform corresponding functions and steps. . It may also be a virtual first forwarding sub-device implemented based on a universal physical server and an NFV technology, and the virtual first forwarding sub-device is a virtual router. In the scenario of the virtual first forwarding sub-device, the first forwarding sub-device mentioned in the foregoing physical edge router embodiment includes an interface board, a switching network board, and the processor can be regarded as a general-purpose physical medium in the virtual environment.
  • the server allocates interface resources, network resources, and processing resources used by the virtual first forwarding sub-device.
  • the function or the step of implementing the first forwarding sub-device by using the general physical server, or the function or the step of implementing the first forwarding sub-device by using the universal physical server and using the NFV technology may refer to the embodiment of FIG. 24 .
  • controller 2510A and the first forwarding sub-device 2500A in the edge router in this embodiment may implement various functions and steps implemented by the edge router in the method embodiment. For brevity, details are not described herein again.
  • the embodiment of the present application further provides a Wi-SUN FAN, where the Wi-SUN FAN includes at least one first forwarding node device.
  • the first forwarding node device may be the first forwarding node device in any of the foregoing embodiments.
  • the embodiment of the present application further provides a computer readable storage medium, where the computer readable storage medium stores computer instructions, and when the instructions are run on a computer, causes the computer to perform the frame aggregation. Any of the embodiments of the network setting frame transmission method.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware.
  • the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本申请公开了一种帧聚合、网络设置帧发送方法及设备。其中，第一转发节点设备接收第一数据帧和第二数据帧，第一数据帧包括第一MAC头和第一MSDU，第二数据帧包括第二MAC头和第二MSDU，第一MAC头与第二MAC头中的目的MAC地址相同；生成第一聚合帧，第一聚合帧包括聚合MAC头和聚合MSDU，聚合MAC头中的目的MAC地址与上述目的MAC地址相同，聚合MSDU包括第一子MSDU和第二子MSDU，第一子MSDU包括第一MSDU和第一数据帧的源MAC地址，第二子MSDU包括第二MSDU和第二数据帧的源MAC地址；第二转发节点设备发送第一聚合帧。上述方法有助于实现减少报文开销、减少信道竞争次数。

Description

一种帧聚合、网络设置帧发送方法及设备
本申请要求于2017年11月29日提交中国专利局、申请号为201711221134.6、发明名称为“一种帧聚合、网络设置帧发送方法及设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种帧聚合、网络设置帧发送方法及设备。
背景技术
无线智能泛在网络(wireless smart ubiquitous network，Wi-SUN)联盟提出了一种可应用于智能抄表、智慧城市、智能电网、智慧农业和资产管理等领域的低功耗广域无线通信技术，即场域网(field area network，FAN)技术。
在智能抄表、环境监控等数据采集等应用场景下，Wi-SUN FAN可以采用树状簇(cluster tree)的拓扑结构进行组网。其中，满足预设条件的节点(例如，距离相近的节点)可以形成一个簇(cluster)，一个簇中的节点具有相同的地址前缀。Wi-SUN FAN中的节点可以分为：叶节点设备、中间转发节点设备和簇头转发节点设备。其中，所述簇头转发节点设备也可以被称为聚合节点。具体地，叶节点设备可以收发报文，但不具有转发报文的能力，例如，智能电表、环境监测设备等。中间转发节点设备，可以提供双向的报文转发功能，同时还可以具备叶节点设备的所有功能。簇头转发节点设备在一个簇内有且仅有一个，是该簇内唯一的数据上行通道，同时还可以具备中间转发节点设备的所有功能。
叶节点设备在采集数据后形成数据帧，并上报给簇头转发节点设备或通过中间转发节点设备上报给簇头转发节点设备，簇头转发节点设备通过与路由器的通道，将数据帧上报给路由器。当然，中间转发节点设备或簇头转发节点设备也可以上报数据帧。上报的数据帧除了包括采集数据，还需要添加物理层(physical layer，PHY)头、介质访问控制(media access control，MAC)头、帧校验序列(frame check sequence，FCS)等，协议开销较大，资源利用率较低；此外，由于采用带有冲突避免的载波侦听多路访问(carrier sense multiple access with collision avoidance，CSMA/CA)的发送方式，在每次发送数据帧前都需要进行信道的竞争，因此，在较多的节点需要上报数据帧时，信道竞争次数较多，可能导致信道资源利用率较低，降低系统的吞吐量。
发明内容
本申请提供一种帧聚合、网络设置帧发送方法及设备，用以实现对数据帧进行聚合，有助于增加信道资源利用率、提高系统性能。
第一方面，本申请实施例提供了一种帧聚合方法，可以应用于Wi-SUN FAN中，具体地，该方法包括：
第一转发节点设备接收第一节点设备发送的第一数据帧和第二节点设备发送的第二数据帧；其中，第一数据帧包括第一MAC头和第一MSDU，第二数据帧包括第二MAC头和第二MSDU。第一转发节点设备确定第一MAC头中的目的MAC地址与第二MAC头中的目的MAC地址相同，则根据第一数据帧和第二数据帧生成第一聚合帧；其中，第一聚合帧包括第一聚合MAC头和第一聚合MSDU，第一聚合MAC中的目的MAC地址与第一MAC头中的目的MAC地址或第二MAC头中的目的MAC地址相同，第一聚合MSDU包括第一子MSDU和第二子MSDU，第一子MSDU包括第一MSDU和第一MAC头中的源MAC地址，第二子MSDU包括第二MSDU和第二MAC头中的源MAC地址。第一转发节点设备向第二转发 节点设备发送第一聚合帧。
在上述方法中，第一转发节点设备可以对接收到的具有相同目的MAC地址的数据帧进行聚合，有助于实现减少报文开销、减少信道竞争次数。
在一种可能的实现方式中，第一节点设备、第二节点设备和第一转发节点设备可以同属于第一簇，第一簇包含于该Wi-SUN FAN中。其中，第一节点设备可以为叶节点设备或中间转发节点设备，若第一节点设备为中间转发节点设备，第一数据帧可以为未经过聚合的数据帧，或者也可以为聚合帧；第二节点设备也可以为叶节点设备或中间转发节点设备，若第二节点设备为中间转发节点设备，第二数据帧可以为未经过聚合的数据帧，或者也可以为聚合帧。
在上述方法中，第一转发节点设备可以对同一簇中的叶节点设备或中间转发节点设备发送的未经过聚合的数据帧或聚合帧进行聚合，例如，第一转发节点设备可以对两个叶节点设备发送的数据帧进行聚合，也可以对两个中间转发节点设备发送的帧进行聚合，还可以对叶节点设备和中间转发节点设备发送的帧进行聚合。具体地，第一转发节点设备可以对两个未经过聚合的数据帧进行聚合，也可以对两个聚合帧再次进行聚合，还可以将未经过聚合的数据帧和聚合帧进行聚合。
在一种可能的实现方式中，第一转发节点设备可以与第二节点设备同属于第一簇，而第一节点设备为第二簇中的簇头节点设备，相应的第一数据帧为聚合帧，第一簇和第二簇不同但均包含于Wi-SUN FAN中。
在上述方法中，第一转发节点设备可以对同属于一簇的节点设备发送的数据帧和其它簇中的簇头节点发送的聚合帧进行聚合。可选地，第二节点设备可以为叶节点设备或中间转发节点设备。
在一种可能的实现方式中，第一转发节点设备为中间转发节点设备，第二转发节点设备为簇头转发节点设备或中间转发节点设备，第一转发节点设备和第二转发节点设备属于相同的簇。
在一种可能的实现方式中，第一转发节点设备和第二转发节点设备分属于不同簇，第一转发节点设备为簇头转发节点设备，第二转发节点设备为中间转发节点设备或簇头转发节点设备，而第一转发节点设备和第二转发节点设备均属于该Wi-SUN FAN中。
在上述方法中，第一转发节点设备可以为簇头节点设备，将生成的聚合帧发送给上一跳中的中间转发节点设备或簇头转发节点设备。可选地，第二转发节点设备还可以对第一转发节点设备发送的第一聚合帧以及第二转发节点设备所在簇中其它节点设备发送的数据帧进一步聚合。
在一种可能的实现方式中，第一转发节点设备为簇头转发节点设备，第二转发节点设备为边缘路由器，而边缘路由器不包含于该Wi-SUN FAN中。
在一种可能的实现方式中，第一转发节点设备为簇头转发节点设备，第一转发节点设备还可以接收来自边缘路由器的网络设置帧，该网络设置帧用于指示第一转发节点设备上报第一聚合帧的时间和第一节点设备和第二节点设备的数据采集时间。第一转发节点设备根据网络设置帧确定上报第一聚合帧的截止时间，并根据该截止时间想第二转发节点设备发送第一聚合帧。
应当理解，上述来自边缘路由器的网络设置帧是边缘路由器生成的，但未必是由边缘路由器直接发送给第一转发节点设备的，例如，边缘路由器将网络设置帧发送给与边缘路 由器连接的簇头转发节点设备，簇头转发节点设备将网络设置帧发送给与该簇头转发节点连接的叶节点设备、中间转发节点设备或其他簇中的簇头转发节点设备。
在上述方法中，第一转发节点设备根据网络设置帧确定发送第一聚合帧的截止时间，有助于保证数据的时效性，避免第一转发节点设备由于长时间等待接收数据帧而导致各节点设备采集的数据不能及时上传至上层应用。
在一种可能的实现方式中，上述网络设置帧可以包括网络设置时间戳、簇跳数、和采样周期，其中，网络设置时间戳为用于确定采样周期的基准时间，簇跳数表示发送网络设置帧的边缘路由器到目的节点设备所在簇的跳数，采样周期用于指示第一节点设备和第二节点设备按照采样周期采集数据。具体地，第一转发节点设备可以根据网络设置时间戳和采样周期获得第一时间，在第一时间中去除簇跳数个截止时间梯度，从而获得截止时间，其中，截止时间梯度用于指示第一转发节点设备将第一聚合帧发送到第一转发节点设备所在簇之外的转发节点设备的时间，然后将网络设置帧中的簇跳数加1。
在另外一种可能的实现方式中，第一转发节点设备也可以先将簇跳加1，再按照上述方法获得截止时间。
可选地，截止时间梯度可以携带在网络设置帧中发送给第一转发节点设备，或者，截止时间梯度也可以是预先为第一转发节点设备配置的。
在一种可能的实现方式中，第一子MSDU和第二子MSDU均包括长度字段，用于指示子MSDU的长度。由于第一聚合帧中的第一聚合MSDU中可以包括多个子MSDU，通过长度字段指示每个子MSDU的长度，以方便其它设备在解析该聚合帧时能够区分上一个子MSDU和下一个子MSDU。
第二方面，本申请实施例提供了一种网络设置帧发送方法，包括：
边缘路由器获取网络设置参数，网络设置参数包括采样周期，采样周期用于指示节点设备按照该采样周期采集数据；边缘路由器根据网络设置参数生成网络设置帧，网络设置帧中包括网络设置时间戳、簇跳数和采样周期，其中，网络设置时间戳用于确定采样周期的基准时间，簇跳数表示发送网络设置帧的边缘路由器到目的节点设备所在簇的跳数；边缘路由器向簇头转发节点设备发送上述网络设置帧，簇头转发节点设备位于Wi-SUN FAN中的第一簇中，第一簇经由该簇头转发节点设备与边缘路由器通信。
在上述方法中，边缘路由器根据获取到网络设置参数生成网络设置帧，并经由与其连接的簇头转发节点设备发送给Wi-SUN FAN中的各节点设备，以使各节点设备确定采样周期并按照采样周期采集数据。进一步地，各转发节点设备还可以根据截止时间梯度和网络设置帧确定出发送聚合帧的截止时间，以保证采集数据的时效性。
在一种可能的实现方式中，网络设置参数还包括采样时间提前量，用于指示节点设备在一个采样周期中的采样时间；相应地，边缘路由器生成的网络设置帧中还可以包括采样时间提前量。通过设置采样时间提前量，可以使得各节点设备根据采样时间提前量以及采样周期确定出采样时间，进而使得各节点设备具有统一的采样时间。
在一种可能的实现方式中，边缘路由器接收簇头转发节点设备发送的聚合帧，该聚合帧是通过对第一节点设备发送的第一数据帧和第二节点设备发送的第二数据帧仅聚合得到的，其中，第一节点设备和第二节点设备均属于Wi-SUN FAN，第一数据帧包括第一MAC头和第一MSDU，第二数据帧包括第二MAC头和第二MSDU，第一MAC头中的目的MAC地址与第二MAC头中的目的MAC地址相同，第一聚合帧包括第一聚合MAC头和第一聚合 MSDU，第一聚合MAC头中的目的MAC地址与第一MAC头中的目的MAC地址或第二MAC头中的目的MAC地址相同，第一聚合MSDU包括第一子MSDU和第二子MSDU，第一子MSDU包括第一MSDU和第一MAC头中的源MAC地址，第二子MSDU包括所述第二MSDU和第二MAC头中的源MAC地址。
在上述方法中，边缘路由器可以接收簇头转发节点设备发送的第一聚合帧，由于第一聚合帧是对具有相同目的MAC地址的数据帧进行聚合得到的，有助于实现减少报文开销、减少信道竞争次数。
第三方面，本申请实施例提供了一种第一转发节点设备，所述第一转发节点设备应用于无线智能泛在网络Wi-SUN场域网FAN中，所述Wi-SUN FAN包括所述第一转发节点设备、第一节点设备和第二节点设备，所述第一转发节点设备具有实现上述帧聚合方法中第一转发节点设备行为的功能。所述功能可以基于硬件实现，也可以基于硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的实现方式中，第一转发节点设备的结构中包括处理器和接口，所述处理器被配置为支持第一转发节点设备执行上述方法中相应的功能。所述接口用于支持第一转发节点设备与第一节点设备、第二节点设备、第二转发节点设备之间的通信。所述第一转发节点设备还可以包括存储器，所述存储器用于与处理器耦合，其保存第一转发节点设备必要的程序指令和数据。
在另一个可能的设计中，所述第一转发节点设备包括：处理器、接收器、发送器、随机存取存储器、只读存储器以及总线。其中，处理器通过总线分别耦接接收器、发送器、随机存取存储器以及只读存储器。其中，当需要运行第一转发节点设备时，通过固化在只读存储器中的基本输入/输出系统或者嵌入式系统中的bootloader引导系统进行启动，引导第一转发节点设备进入正常运行状态。在第一转发节点设备进入正常运行状态后，在随机存取存储器中运行应用程序和操作系统，使得该处理器执行第一方面或第一方面的任意可能的实现方式中的方法。
第四方面，提供一种第一转发节点设备，所述第一转发节点设备包括：主控板和接口板，进一步，还可以包括交换网板。所述第一转发节点设备用于执行第一方面或第一方面的任意可能的实现方式中的方法。具体地，所述第一转发节点设备包括用于执行第一方面或第一方面的任意可能的实现方式中的方法的模块。
第五方面，提供一种第一转发节点设备，所述第一转发节点设备包括控制器和第一转发子设备。所述第一转发子设备包括：接口板，进一步，还可以包括交换网板。所述第一转发子设备用于执行第四方面中的接口板的功能，进一步，还可以执行第四方面中交换网板的功能。所述控制器包括接收器、处理器、发送器、随机存取存储器、只读存储器以及总线。其中，处理器通过总线分别耦接接收器、发送器、随机存取存储器以及只读存储器。其中，当需要运行控制器时，通过固化在只读存储器中的基本输入/输出系统或者嵌入式系统中的bootloader引导系统进行启动，引导控制器进入正常运行状态。在控制器进入正常运行状态后，在随机存取存储器中运行应用程序和操作系统，使得该处理器执行第四方面中主控板的功能。
第六方面，本申请实施例提供了一种边缘路由器，具有实现上述网络设置帧发送方法中边缘路由器行为的功能。所述功能可以基于硬件实现，也可以基于硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一种可能的实现方式中，边缘路由器的结构中包括处理器和接口，所述处理器被配置为支持边缘路由器执行上述方法中相应的功能。所述接口用于支持边缘路由器与簇头转发节点设备之间的通信。所述边缘路由器还可以包括存储器，所述存储器用于与处理器耦合，其保存边缘路由器必要的程序指令和数据。
在另一个可能的设计中，所述边缘路由器包括：处理器、接收器、发送器、随机存取存储器、只读存储器以及总线。其中，处理器通过总线分别耦接接收器、发送器、随机存取存储器以及只读存储器。其中，当需要运行边缘路由器时，通过固化在只读存储器中的基本输入/输出系统或者嵌入式系统中的bootloader引导系统进行启动，引导边缘路由器进入正常运行状态。在边缘路由器进入正常运行状态后，在随机存取存储器中运行应用程序和操作系统，使得该处理器执行第二方面或第二方面的任意可能的实现方式中的方法。
第七方面，提供一种边缘路由器，所述边缘路由器包括：主控板和接口板，进一步，还可以包括交换网板。所述边缘路由器用于执行第二方面或第二方面的任意可能的实现方式中的方法。具体地，所述边缘路由器包括用于执行第二方面或第二方面的任意可能的实现方式中的方法的模块。
第八方面，提供一种边缘路由器，所述边缘路由器包括控制器和第一转发子设备。所述第一转发子设备包括：接口板，进一步，还可以包括交换网板。所述第一转发子设备用于执行第七方面中的接口板的功能，进一步，还可以执行第七方面中交换网板的功能。所述控制器包括接收器、处理器、发送器、随机存取存储器、只读存储器以及总线。其中，处理器通过总线分别耦接接收器、发送器、随机存取存储器以及只读存储器。其中，当需要运行控制器时，通过固化在只读存储器中的基本输入/输出系统或者嵌入式系统中的bootloader引导系统进行启动，引导控制器进入正常运行状态。在控制器进入正常运行状态后，在随机存取存储器中运行应用程序和操作系统，使得该处理器执行第七方面中主控板的功能。
第九方面，提供一种Wi-SUN FAN，所述Wi-SUN FAN包括如前所述的任一实施例中的第一转发节点设备。
第十方面，提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机指令，当所述指令在计算机上运行时，使得计算机执行如第一方面或第二方面所述的方法。
附图说明
图1为本申请实施例提供的一种Wi-SUN FAN应用场景示意图；
图2为本申请实施例提供的数据帧的结构示意图；
图3为本申请实施例提供的数据帧中的负载信息元的结构示意图；
图4为本申请实施例提供的数据帧中的采样时间信息元的结构示意图；
图5为本申请实施例提供的帧聚合方法的流程示意图；
图6为本申请实施例提供的聚合帧的结构示意图之一；
图7为本申请实施例提供的子MSDU的结构示意图之一；
图8为本申请实施例提供的聚合帧的结构示意图之二；
图9为本申请实施例提供的子MSDU的结构示意图之二；
图10为本申请实施例提供的子MSDU的结构示意图之三；
图11为本申请实施例提供的聚合帧的结构示意图之三；
图12为本申请实施例提供的聚合帧的结构示意图之四；
图13为本申请实施例提供的聚合帧的结构示意图之五；
图14为本申请实施例提供的网络设置帧的结构示意图；
图15为本申请实施例提供的网络设置帧中的负载信息元的结构示意图；
图16为本申请实施例提供的网络设置帧中的版本号信息元的结构示意图；
图17为本申请实施例提供的网络设置帧中的帧聚合信息元的结构示意图；
图18为本申请实施例提供的网络设置帧发送方法的流程示意图；
图19为本申请实施例提供的第一转发节点设备的结构示意图之一；
图20为本申请实施例提供的第一转发节点设备的结构示意图之二；
图21为本申请实施例提供的第一转发节点设备的结构示意图之三；
图22为本申请实施例提供的第一转发节点设备的结构示意图之四；
图23为本申请实施例提供的边缘路由器的结构示意图之一；
图24为本申请实施例提供的边缘路由器的结构示意图之二；
图25为本申请实施例提供的边缘路由器的结构示意图之三；
图26为本申请实施例提供的边缘路由器的结构示意图之四。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。
图1示例性的给出了一种Wi-SUN FAN的应用场景。如图所示，Wi-SUN FAN包括簇1、簇2、簇3以及簇4中的节点设备，虽然图1中示出了边缘路由器以及路由器，但边缘路由器以及路由器并不属于本申请实施例中的Wi-SUN FAN。其中，簇2中的簇头转发节点设备与簇1中的中间转发节点设备连接，即簇1为簇2的上一跳；簇3中的簇头转发节点设备与簇2中的中间转发节点设备连接，即簇2为簇3的上一跳；簇1和簇4中的簇头转发节点设备直接与边缘路由器连接，簇1和簇4的簇跳数可以设为1，簇2的簇跳数可以设为2，簇3的簇跳数可以设为3，或者，簇1和簇4的簇跳数也可以设为0，则簇2的簇跳数可以设为1，簇3的簇跳数可以设为2。
以图1所示的为智能抄表或环境监控的数据采集场景为例，智能水表、电表或环境监控设备(可以是叶节点设备、中间转发节点设备或簇头转发节点设备)通常需要周期性地将采集到的数据上报给网络，以方便用户能够通过网络对采集数据进行监控、管理。
各节点将采集到的数据可以封装在如图2所示的数据帧(即聚合前的数据帧)中，发送给上一节点。
具体地，如图2所示，MAC层头中包括帧控制字段、序列号字段、目的MAC地址字段、源MAC地址字段、辅助安全头(auxiliary security header，AUX security header)、头信息元(header information elements，header IEs)。其中，帧控制用于提供解析帧的信息索引；序列号字段表示发送该数据帧的节点对该数据帧设置的编号；目的MAC地址表示该数据帧的目的设备的MAC地址；辅助安全头表示用于指示对数据帧进行解密时所需的密钥，例如，密钥的索引值；头信息元用于指示该数据帧的类型和该数据帧在本地单播时隙中发出的时间点。
MAC层服务数据单元(MAC service data unit，MSDU)包括负载信息元和帧负载数据，其中，负载信息元用于指示MSDU的长度、类型等信息，帧负载数据中包括节点采集的数据。
进一步地，负载信息元可以如图3所示，包括MSDU的长度、组标识、负载信息类型、采样时间信息元、其它负载信息元以及终止负载信息元。采样时间信息元可以如图4所示，包括长度、ID、类型以及采样时间。
FCS字段用于对数据帧进行校验，具体地，发送方根据预设算法对数据帧进行计算得到的计算结果，接收方收到该数据帧后，对该数据帧应用相同算法进行计算，如果计算结果与接收的FCS字段相同则认为接收的数据帧正确，否则，接收方认为数据帧发生错误，并丢弃该数据帧。
因此，每个节点在发送数据帧时均需要通过大量字节发送上述信息，而在发送数据帧的节点较多的情况下，需要进行多次信道竞争，影响信道资源利用率及系统吞吐量。
为了解决上述技术问题，本申请实施例提供了一种帧聚合方法，应用于Wi-SUN FAN中，用以实现对数据帧进行聚合，有助于增加信道资源利用率、减少竞争次数、提高系统性能。
本申请实施例提供的帧聚合方法可以应用于如图1所示的Wi-SUN FAN中，但图1所示的网络结构并不对本申请构成限定。应当理解，本申请实施例能够适用的场景中可以包括比图1所示更多或更少数量的簇，此外，下一跳中的簇头转发节点设备还可以与上一跳中的簇头转发节点设备连接，例如，簇头转发节点设备2可以与簇头转发节点设备1连接，簇头转发节点设备3可以与簇头转发节点设备2连接，本申请实施例对此不做限制。
参见图5，为本申请实施例提供的帧聚合方法的流程示意图，如图所示，该方法可以包括以下步骤：
步骤501、第一转发节点设备接收第一节点设备发送的第一数据帧和第二节点设备发送的第二数据帧。
其中，第一数据帧包括第一MAC头和第一MSDU，第二数据帧包括第二MAC头和第二MSDU。第一MAC头和第二MAC头的格式可以如图2所示，但不限于图2所示的MAC头可以包括，可以包括比图2所示的MAC更多或更少的信息。而数据帧中的MSDU包括上报的数据，例如，若第一节点设备为智能电表，则智能电表采集的当前用电量包含于MSDU中。
可选地，第一转发节点设备可以是簇头转发节点设备，也可以是中间转发节点设备，即簇头转发节点设备和中间转发节点设备均可以应用本申请实施例提供的帧聚合方法对接收到的数据帧进行聚合。
如图1所示，由于簇头转发节点设备可以与本簇中的叶节点设备、中间转发节点设备连接，即可以接收本簇中的叶节点设备、中间转发节点设备发送的数据帧，因此，在上述步骤中，第一转发节点设备接收到的第一数据帧可以是本簇中的叶节点设备发送的数据帧，也可以是本簇中的中间转发节点设备发送的数据帧；第二数据帧可以是本簇中的叶节点设备发送的数据帧，也可以是本簇中的中间转发节点设备发送的数据帧。
例如，如图1所示，若簇头转发节点设备C1作为第一转发节点设备，簇头转发节点设备C1可以接收簇1中的中间转发节点设备Z1和中间转发节点设备Z2发送的数据帧并对其进行聚合；若中间转发节点设备Z1作为第一转发节点设备，中间转发节点设备Z1可以接收叶节点设备Y1和叶节点设备Y2发送的数据帧并对其进行聚合；若簇头转发节点设备C4作为第一转发节点设备，簇头转发节点设备C4可以接收叶节点设备Y10和中间转发节点设备Z6发送的数据帧并对其进行聚合；若中间转发节点设备Z6作为第一转发节点设备，中间转发节点设备Z6可以接收叶节点设备Y11和中间转发节点设备Z7发送的数据帧并对其进行聚合。 此外，虽然图1中未示出，但簇头转发节点设备也可以与多个叶节点设备连接，接收多个叶节点设备发送的数据帧并对其进行聚合；中间转发节点设备也可以与多个中间转发节点设备连接，接收多个中间转发节点设备发送的数据帧并对其进行聚合。
进一步地，若第一节点设备为叶节点设备，第一节点设备发送的第一数据帧通常为未经过聚合的数据帧。若第一节点设备为中间转发节点设备，例如与第一转发节点设备归属于相同簇的中间转发节点设备，第一节点设备发送的第一数据帧可以为未经过聚合的数据帧，也可以为聚合帧。
例如，若中间转发节点设备不具备对数据帧进行聚合的能力，可以将其自身生成的数据帧或接收到的其他节点设备发送的数据帧转发给第一转发节点设备；若中间转发节点设备不具备聚合能力，但其接收到的其它节点设备发送的聚合帧，该中间转发节点设备也可以将聚合帧发送给第一转发节点设备；若中间转发节点设备具有聚合能力，那么中间转发节点设备可以对接收到的多个数据帧进行聚合并发送给第一转发节点设备。
同样地，第二节点设备可以为叶节点设备，也可以为中间转发节点设备。相应地，第二数据帧可以为未经过聚合的数据帧，也可以为聚合帧，此处不再赘述。
在一些实施例中，第一节点设备，或第二节点设备，或第一节点设备和第二节点设备也可以与第一转发节点设备分属于不同的簇。例如，若图1中的中间转发节点设备Z2作为第一转发节点设备，与其连接的叶节点设备Y3与中间转发节点设备Z2属于相同的簇，但与其连接的簇头转发节点设备C2与中间转发节点设备Z2属于不同的簇。
当第一节点设备与第一转发节点设备属于不同的簇时，第一节点设备通常为下一跳中的簇头转发节点设备，例如图1中的中间转发节点设备Z2和簇头转发节点设备C2，因此，第一节点设备发送的第一数据帧可以为聚合帧。当然，即使第一节点设备为簇头转发节点设备，也可能不具有聚合功能，或者具备聚合功能但某时刻没有多个能够参与聚合的数据帧时，第一节点设备也可以将未经过聚合的数据帧发送给第一转发节点设备。
相应地，第二节点设备与第一转发节点设备属于不同簇时，第二节点设备发送的第二数据帧可以为聚合帧，也可以为未经过聚合的数据帧。
步骤502、第一转发节点设备确定第一MAC头中的目的MAC地址与第二MAC头中的目的MAC地址相同，第一转发节点设备根据第一数据帧和第二数据帧生成第一聚合帧。
具体地，生成的第一聚合帧包括第一聚合MAC头和第一聚合MSDU，聚合帧的结构可以如图6所示。应当理解，本申请实施例虽然以对两个数据帧进行聚合为例，但本申请提供的帧聚合方法还可以对更多数据量的数据帧进行聚合，生成的聚合帧中的MSDU中还可以包括更多数量的子MSDU。
其中，第一聚合MAC头中的目的MAC地址与第一MAC头中的目的MAC地址或第二MAC头中的目的MAC地址相同。由于第一数据帧中的第一MAC头中的目的MAC地址与第二数据帧中的第二MAC头中的目的MAC地址相同，因此，第一转发节点设备在生成第一聚合帧时，可以从第一MAC头中获取目的MAC地址用于生成聚合帧中的第一聚合MAC头中的目的MAC地址，或者，也可以从第二MAC头中获取目的MAC地址用于生成聚合帧。或者，在一种应用场景中，各节点均将采集到的数据发送给边缘路由器，再由边缘路由器将数据发送至上层应用，则具有聚合功能的转发节点设备可以预先存储有目的MAC地址，或者预先存储有聚合帧的模板，模板中包括目的MAC地址。由于在聚合帧的聚合MAC报头中包含有目的MAC地址，每个子MSDU中无需再包含目的MAC地址，以减少多个相同目 的MAC地址占用大量字节，起到减少报文开销的作用。
此外，第一聚合MSDU包括第一子MSDU和第二子MSDU，其中，第一子MSDU包括第一数据帧中的第一MSDU以及第一MAC头中的源MAC地址，如图7所示；第二子MSDU包括第二数据帧中的第二MSDU和第二MAC头中的源MAC地址，与图7所示的结构类似。
聚合帧中的每个子MSDU中保留有源MAC地址以及聚合前的数据帧中包括的MSDU，使接收该聚合帧的上层应用在获取各节点上报的数据时，能够将数据与节点对应起来，方便进行数据统计、分析及管理。
如前所述，第一数据帧可以是未经过聚合的数据帧，也可以是聚合帧，第二数据帧也可以为未经过聚合的数据帧或者为聚合帧。在一个具体实施例中，若第一转发节点设备接收到的第一数据帧为聚合帧，接收到的第二数据帧为未经过聚合的数据帧，第一转发节点设备可以将根据第二数据帧生成的子MSDU添加到第一数据帧中，或者也可以重新生成聚合MAC头，并根据第一数据帧和第二数据帧生成子MSDU并聚合封装到新的聚合帧中。
举例说明，如图8所示，第一数据帧为聚合帧，包括第一MAC头和第一MSDU，其中，第一MSDU中进一步包括第一子MSDU和第二子MSDU。第二数据帧为未经过聚合的数据帧，包括第二MAC头和第二MSDU。第一转发节点设备根据第一数据帧和第二数据帧生成的第一聚合帧可以如图所示，包括第一聚合MAC头和第一聚合MSDU。其中，第一聚合MAC头可以与第一数据帧中的第一MAC头一致，当然也可以不一致。例如，聚合MAC头中若包括帧序列号，则第一转发节点设备根据自身发送数据帧的情况确定第一聚合帧中的序列号；又例如，第一聚合MAC头中若包括辅助安全头，则第一转发节点设备可以根据自身对数据帧进行加密的密钥确定辅助安全头。第一聚合MSDU中包括第一子MSDU、第二子MSDU和第三子MSDU，其中，第三子MSDU包括第二MAC头中的源MAC地址以及第二MSDU。
在本申请实施例中，第一转发节点设备对具有相同目的MAC地址的数据帧进行聚合，有助于实现减少报文开销、减少信道竞争次数。尤其是在各节点设备需要周期性地上报数据帧时，对各节点设置相同的采样周期，则同一时刻或一段较短时间内，存在多个节点设备上报数据帧且目的MAC地址相同，即第一转发节点设备可以对多个数据帧应用本申请实施例提供的帧聚合方法对数据帧进行聚合，以起到减少报文开销及减少信道竞争次数的作用。
在一种可能的实现方式中，聚合帧中的每个子MSDU中还包括长度字段，如图9所示。长度字段用于指示每个子MSDU的长度。由于每个节点上报的数据信息不同，因此每个子MSDU的长度可能不同，因此，在每个子MSDU中增加长度字段，可以方便接收聚合帧的设备区分上一个子MSDU和下一个子MSDU。
应当理解，长度字段能够方便其它设备在解析该聚合帧时能够区分上一个子MSDU和下一个子MSDU，但也可以通过其它方式进行区分，例如，在两个子MSDU之间插入分隔符，或者根据其他信息识别一个子MSDU的起始位置或结束位置。
此外，每个子MSDU中还可以包括数据的采样时间，如图10所示，以方便上层应用根据采样时间、采样数据进行统计、管理。
图10所示的第一子MSDU中包括保留比特位，用于对子MSDU进行区分，如前所述，每个子MSDU中也可以没有保留比特位，根据子MSDU信息等其他信息区分上一个子MSDU和下一个子MSDU。
在一种可能的实现方式中，聚合帧中的聚合MAC头中还可以包括以下信息之一或任意组合：帧控制信息，序列号，辅助安全头，以及头信息元。相应地，聚合MAC头中若包括上述信息，则聚合帧中的子MSDU中可以不再包括上述信息，以进一步减少报文开销。在一个具体实施例中，聚合帧的结构可以如图11所示。
可选地，为了方便了第一转发节点设备对接收到的数据帧进行解密从而将数据帧中的信息聚合封装到聚合帧中，Wi-SUN FAN中的各节点可以采用相同的加密方法，即辅助安全头所指示的密钥相同，以简化第一转发节点设备的解密过程。第一转发节点设备在根据接收到的各数据帧生成聚合帧时，也采用与各节点设备相同的加密方法对聚合帧进行加密。
进一步地，还可以为聚合帧添加物理层头(PHY header)和/或FCS，如图12所示，相应地，每个子MSDU中可以不再保留源数据帧中的物理层头以及FCS，以实现在对N个数据帧进行聚合时，能够减少N-1个物理层头以及FCS的字节开销。其中，FCS字段中包含的信息，可以是对聚合帧按照预设方法计算生成的聚合帧的校验信息。
可选地，第一转发节点设备还可以仅对同一采样周期内采集数据并发送的数据帧进行聚合，此时，还可以将采样时间信息元添加到聚合帧中，如图13所示，相应地，每个子MSDU中可以不再保留采样时间信息元，以进一步减少字节开销。如图13所示，聚合帧中还可以包括其他负载信息元意见终止负载信息元，则每个子MSDU中可以不再保留其他负载信息元以及终止负载信息元，以进一步减少字节开销。
可选地，第一转发节点设备在接收到第一数据帧和第二数据帧之后即开始生成第一聚合帧，也可以在约定的第一转发节点设备上报数据帧的时间之前，再根据第一数据帧和第二数据帧生成第一聚合帧。在一些场景中，例如多个环境监测设备都要周期性上报监测数据，且这些数据帧的目的MAC地址为边缘路由器或其他预设地址，则第一转发节点设备也可以在接收到第一数据帧后，则开始将第一数据帧进行聚合封装。
虽然在上述实施例中，以第一转发节点设备根据第一数据帧和第二数据帧生成聚合帧为例，但本申请提供的帧聚合方法还可以对更多数据量的数据帧进行聚合，且参与聚合的数据帧的数量越多，减少的报文开销越多，减少的信道竞争次数越多。但是，参与聚合的数据帧的数量越多，形成的聚合帧的长度越长，若聚合帧的长度过长，可能会发生传输错误。为了避免传输错误，可以对聚合帧的长度设置上限，例如，在Wi-SUN FAN中的物理层最大载荷所能支持的帧长度为2047个字节，则可以将2047字节作为聚合帧长度的上限。
第一转发节点设备在根据多个数据帧生成聚合数据帧时，通常按照接收的时间顺序，依次根据每个参与聚合的数据帧生成一个子MSDU。可选地，第一转发节点设备在根据一个数据帧生成一个子MSDU之前，可以先判断若根据该数据帧生成子MSDU并聚合封装到聚合帧中，是否会使得聚合帧的长度超过预先设置的上限，若未超过，则继续聚合封装，否则，不继续在该聚合帧中聚合封装新的子MSDU，并根据还未参与聚合封装的数据帧生成新的聚合帧。
在一些实施例中，第一转发节点设备也可能需要上报数据，此时，第一转发节点设备可以生成数据帧，再根据生成的数据帧生成子MSDU并聚合封装到聚合帧中，或者，第一转发节点设备也可以根据需要上报的数据生成子MSDU并聚合封装到聚合帧中。
步骤503、第一转发节点设备向第二转发节点设备发送第一聚合帧。
在一种可能的实现方式中，第一转发节点设备为中间转发节点设备(如中间转发节点设备)，第二转发接收设备可以为第一转发节点设备所在簇中的簇头转发节点设备，或者， 第二转发节点设备也可以为第一转发节点设备所在簇中的中间转发设备。例如，若图1所示的中间转发节点设备Z1为第一转发节点设备，则第二转发节点设备为簇头转发节点设备C1；若图1所示的中间转发节点设备Z7为第一转发节点设备，第二转发节点设备为中间转发节点设备Z6。
在另外一种可能的实现方式中，第一转发节点设备为簇头转发节点设备，第二转发节点设备为中间转发节点设备或簇头转发节点设备，而第一转发节点设备和第二转发节点设备分属于不同的簇。例如，若图1所示的簇2中的簇头转发节点设备C2为第一转发节点设备，则第二转发节点设备为簇1中的中间转发节点设备Z2；此外，虽然图1中未示出，但簇2中的簇头转发节点设备C2也可以与簇1中的簇头转发节点设备C1连接，此时，若簇头转发节点设备C2为第一转发节点设备，则第二转发节点设备为簇头转发节点设备C1。
还有一种可能的实现方式，第一转发节点设备为簇头转发节点设备，第二转发节点设备为边缘路由器，但边缘路由器位于Wi-SUN FAN之外。例如，若如图1所示的簇头转发节点设备C1为第一转发节点设备，则第二转发节点设备为边缘路由器。
由于第一转发节点设备在根据接收到的多个数据帧生成聚合帧时，为了较大限度地减少报文开销、减少信道竞争次数、充分利用信道资源，可能需要等待一段时间，以接收更多的、能够参与聚合的数据帧并对其进行聚合。然而，为了保证数据的时效性，可以对第一转发节点设备设置发送聚合帧的截止时间，以使第一转发节点设备不会因为长时间等待而导致各节点设备采集的数据不能及时上传至上层应用。
在一些实施例中，第一转发节点设备还可以接收来自边缘路由器的网络设置帧，该网络设置帧用于指示第一转发节点设备上报第一聚合帧的时间，以及第一节点设备和第二节点设备采集数据的时间。其中，该网络设置帧由边缘路由器生成，并通过各节点设备逐层向下发送。仍以图1为例，边缘路由器将网络设置帧发送给簇头转发节点设备C1和簇头转发节点设备C4，簇头转发节点设备C1将网络设置帧发送给路由转发节点设备Z1和路由转发节点设备Z2，路由转发节点设备Z1将网络设置帧转发给叶节点设备Y1和叶节点设备Y2，路由转发节点设备Z2将网络设置帧转发给叶节点设备Y3和簇头转发节点设备C2，以此类推。
第一转发节点设备根据接收到的网络设置帧确定上报第一聚合帧的截止时间，并根据该截止时间想第二转发节点设备发送第一聚合帧。
进一步地，可以仅对簇头转发节点设备设置截止时间，而不对路由转发节点设备设置截止时间，当然，也可以对簇头转发节点设备和路由转发节点设备设置截止时间。
下面以仅对簇头转发节点设备设置截止时间为例，进一步说明。
在一个具体的实现方式中，网络设置帧中包括：网络设置时间戳t c、簇跳数i、采样周期P。
其中，采样周期P用于指示各节点设备(可以包括叶节点设备、中间转发节点设备以及簇头转发节点设备)按照采样周期采集数据并上报。在智能抄表、环境监测等应用场景中，各节点设备每个采样周期采集一次数据并上报，簇头转发节点设备和/或中间转发节点设备在每个采样周期内对数据帧进行聚合并向上发送聚合后的数据帧。通常情况下，一种应用控制下的节点设备的采样周期相同，例如，各智能电表上报用电量的周期相同，各环境监测设备上报环境参数的周期相同。
网络设置时间戳t c用于确定采样周期的基准时间，例如，采样周期为60s，那么 t c～t c+60s即为第一个采样周期，t c+60s～t c+120s即为第二个采样周期，以此类推。可选地，边缘路由器在发送网络设置帧时，可以将发送时间作为网络设置时间戳t c，以使各节点设备根据该网络设置时间戳确定采样周期，各簇头转发节点设备在向中间转发节点设备或叶节点设备转发网络设置帧时，或者，中间转发节点设备向叶节点设备或下一跳簇头转发节点设备转发网络设置帧时，不改变网络设置时间戳t c，以使各节点设备具有统一的采样周期及采样时间。
簇跳数i表示发送网络设置帧的边缘路由器到目的节点设备所在簇的跳数。例如，以图1所示的网络架构图为例，簇1和簇4中的各节点设备的簇跳数可以设置为1，簇2中的各节点设备的簇跳数可以设置为2，簇3中的各节点设备的簇跳数可以设置为3；或者，簇1和簇4中的各节点设备的簇跳数可以设置为0，簇2中的各节点设备的簇跳数可以设置为1，簇3中的各节点设备的簇跳数可以设置为2。
簇头转发节点设备可以根据网络设置时间戳t c和采样周期P获得第一时间，并在第一时间中去i个截止时间梯度ΔD得到截止时间。其中，截止时间梯度ΔD用于指示簇头转发节点设备将聚合帧发送到该簇头转发节点设备所在簇之外的转发节点设备的时间。仍以图1所示的网络架构图为例，若簇头转发节点设备C1发送聚合帧的截止时间为T1，簇头转发节点设备C2发送聚合帧的截止时间为T2＝T1-ΔD，簇头转发节点设备C3发送聚合帧的截止时间为T3＝T1-2×ΔD。
可选地，截止时间梯度ΔD可以包含于网络设置帧中，也可以预先配置在第一转发节点设备中。
在一个具体实施例中，簇头转发节点设备可以根据公式(1)确定出该簇头转发节点设备发送聚合帧的截止时间D(i)。
D(i)＝t c+n×P-i×ΔD     (1)
其中，n表示采样周期的序号。
可选地，上述n可以由簇头转发节点设备自行计算。具体地，簇头转发节点设备可以根据公式(2)确定出当前的采样周期序号n。
Figure PCTCN2018088091-appb-000001
其中，符号
Figure PCTCN2018088091-appb-000002
表示向上取整，t表示当前时间，t c表示网络设置时间戳，P表示采样周期。
当然，簇头转发节点设备也可以通过其它方式确定采样周期序号，例如，簇头转发节点设备可以用以表示存储采样次数的参数，每经过一个采样周期，该参数的值+1。本申请对如何确定采样周期序号n不做限制。
进一步地，网络设置帧中还可以包括采样时间提前量，用于指示各节点设备在一个采样周期中的采样时间。在一个具体实现方式中，各节点设备在接收到网络设置帧后，可以根据公式(3)确定采样时间。
t s＝t c+n×P-ΔT     (3)
其中，t s表示节点设备的采样时间，n表示采样周期的序号，P表示采样周期，ΔT表示采样时间提前量。t c表示网络设置时间戳。例如，若采样周期为60s，采样时间提前量为1s，网络设置时间戳为0，相应地，各节点在(0+1*60-1)s处进行第一次采样，在(0+2*60-1)s处进行第二次采样，以此类推。
其中，各节点确定n的取值的方法，与前述簇头转发节点设备确定n的取值方法类似， 此处不再赘述。
在一个具体实施例中，网络设置帧的结构可以如图14所示，包括MAC层头、MAC层负载以及FCS。其中，MAC层头可以进一步包括帧控制字段、个域网标识、源MAC地址、负载安全头、头信息元。进一步地，图14中的负载信息元字段具体可以包括如图15所示的信息，其中，版本号信息元(PAN version IE)字段和帧聚合信息元(FAGG IE)字段可以分别如图16和图17所示。
在一种可能的实现方式中，簇1和簇4中各节点设备的簇跳数为1、簇2中各节点设备的簇跳数为2、簇3中各节点设备的簇跳数为3时，边缘路由器发送的网络设置帧中的簇跳数的初始值可以为1，簇头转发节点设备C1在根据边缘路由器发送的网络设置帧确定出自身的截止时间，在将网络设置帧转发给其它节点设备时，将网络设置帧中的簇跳数+1，以使簇头转发节点设备C2能够根据修改后的网络设置帧计算出其相应的截止时间，而对于簇1中的各节点设备，来说，由于可以仅计算采样时间而不需要计算截止时间，因此其它各节点设备不受簇跳数改变的影响。簇头转发节点设备C2在转发网络设置帧时，再将簇跳数+1，以使簇头转发节点设备C3能够根据修改后的网络设置帧计算出其相应的截止时间。
在另外一种可能的实现方式中，簇1和簇4中各节点设备的簇跳数为1、簇2中各节点设备的簇跳数为2、簇3中各节点设备的簇跳数为3时，边缘路由器发送的网络设置帧中的簇跳数的初始值可以为0，簇头转发节点设备C1先将网络设置帧中的簇跳数+1，然后再计算截止时间，并将网络设置帧转发给中间转发节点设备Z1和中间转发节点设备Z2，中间转发节点设备Z2将网络设置帧转发给簇头转发节点设备C2；簇头转发节点设备C2先将网络设置帧中的簇跳数+1，然后再计算截止时间，以此类推。
此外，在上述两种实现方式中，还可以将簇1和簇4中各节点设备的簇跳数为0、簇2中各节点设备的簇跳数为1、簇3中各节点设备的簇跳数为2。
为了更清楚地理解本申请实施例提供的帧聚合方法，下面通过具体实施例并结合图1进一步说明。
用户通过上层应用对网络设置参数进行设置：采样周期为60s，截止时间梯度为0.1s，采样时间提前量为1s。上层应用通过网络将上述网络设置参数发送给边缘路由器，边缘路由器生成网络设置帧，该网络设置帧中包括以下信息：网络设置时间戳0s，采样周期为60s、截止时间梯度为0.1s、采样时间提前量为1s，簇跳数为1。
各节点设备的采样时间为60-1＝59s，簇头转发节点设备1和簇头转发节点设备4根据网络设置帧计算出发送聚合帧的截止时间为60-0.1＝59.9s；簇转发节点设备C1将簇跳数修改为2并转发给路由转发节点设备Z1和Z2，路由转发节点设备Z2将网络设置帧转发给簇头转发节点设备C2，簇头转发节点设备C2根据网络设置帧计算出发送聚合帧的截止时间为60-2*0.1＝59.8s；簇转发节点设备C2将簇跳数修改为3并转发给路由转发节点设备Z4，路由转发节点设备Z4将网络设置帧转发给簇头转发节点设备C3，簇头转发节点设备C3根据网络设置帧确定出发送聚合帧的截止时间为60-3*0.1＝59.7s。
本申请实施例还提供了一种网络设置帧发送方法，用于实现为同一网络中的各节点设备设置统一的采样周期，为同一网络中的转发节点设备设置发送聚合帧截止时间。参见图18，为本申请实施例提供的网络设置帧发送方法的流程示意图，如图所示，该方法可以包括以下步骤：
步骤1801、边缘路由器获取网络设置参数。
在一种可能的实现方式中，边缘路由器获取的网络设置参数可以是网络发送的。例如，管理者可以在上层应用中配置网络设置参数，并通过网络发送给边缘路由器。
其中，网络设置参数可以包括采样周期P，用于指示节点设备按照所述采样周期采集数据并上报。
可选地，网络设置参数中还可以包括截止时间梯度ΔD。通常情况下，为了便于管理，在同一Wi-SUN FAN中的截止时间梯度均相同。仍以图1所示的网络架构图为例，若簇1中的簇头转发节点设备C1发送聚合帧的截止时间为T1，簇2中的簇头转发节点设备C2发送聚合帧的截止时间为T2＝T1-ΔD，簇3中的簇头转发节点设备C3发送聚合帧的截止时间为T3＝T2-ΔD。
在一种具体实现方式中，管理者可以在上层应用中设置采样周期和截止时间梯度，并通过网络发送给边缘路由器。管理者可以根据不同的应用场景设置不同的采样周期以及截至时间梯度，例如，可以设置智能电表的采样周期为1个月，以方便统计用户的用电量及电费；又例如，可以设置环境监测设备的采样周期为1小时，以方便对环境状况进行监控。
进一步地，网络设置参数还可以包括采样时间提前量，用于指示节点设备在一个采样周期中的采样时间。例如，若采样周期为60s，采样时间提前量为1s，则表示各节点设备在每个周期中的第(60-1)s采集数据并上报。
步骤1802、边缘路由器根据网络设置参数生成网络设置帧。
具体地，该网络设置帧中包括网络设置时间戳t c、簇跳数i、采样周期。其中，网络设置时间戳t c、簇跳数的含义与前述方法类似，此处不再赘述。
如前所述，网络设置参数中还可以包括截止时间梯度ΔD和/或采样时间提前量，相应地，边缘路由器生成的网络设置帧中可以还可以包括截止时间梯度ΔD和/或采样时间提前量。
步骤1803、边缘路由器向簇头转发节点设备发送网络设置帧。
边缘路由器可以与一个或多个簇头转发节点设备连接，相应的，边缘路由器可以将网络设置帧发送给与该边缘路由器连接的簇头转发节点设备，而簇头转发节点设备进一步将网络设置帧发送给与其连接的叶节点设备、中间转发节点设备或其他簇中的簇头转发节点设备，从而实现将网络设置帧发送给Wi-SUN FAN中的各节点设备。
在一种可能的实现方式中，边缘路由器设置的初始簇跳数为1，边缘路由器将网络设置帧发送给如图1所示的簇头转发节点设备C1和簇4中的簇头转发节点设备C4；簇头转发节点设备C1将网络设置帧中的簇跳数修改为2并转发给中间转发节点设备Z1和中间转发节点设备Z2；中间转发节点设备Z2将网络设置帧转发给叶节点设备Y1和叶节点设备Y2。中间转发节点设备Z2将网络设置帧发送给簇头转发节点设备C2，簇头转发节点设备C2将网络设置帧中的簇跳数修改为3并转发给中间转发节点设备Z3、中间转发节点设备Z4和叶节点设备Y4，中间转发节点设备Z4将网络设置帧发送给簇头转发节点设备C3。
在另外一种可能的实现方式中，边缘路由器设置的初始簇跳数为0，边缘路由器将网络设置帧发送给如图1所示的簇头转发节点设备C1和簇4中的簇头转发节点设备C4；簇头转发节点设备C1将簇跳数修改为+1将修改后的网络设置帧转发给中间转发节点设备Z1和中间转发节点设备Z2；中间转发节点设备Z2将网络设置帧转发给叶节点设备Y1和叶节点设备Y2，中间转发节点设备Z2将网络设置帧发送给簇头转发节点设备C2。簇头转发节点设备C2将簇跳数修改为+1将修改后的网络设置帧转发给中间转发节点设备Z3、中间转发节点设 备Z4和叶节点设备Y4，中间转发节点设备Z4将网络设置帧发送给簇头转发节点设备C3。簇头转发节点设备C3将簇跳数修改为+1将修改后的网络设置帧转发给中间转发节点设备Z5和叶节点设备Y7。
在一种可能的实现方式中，边缘路由器在生成网络设置帧时，可以在网络设置帧中添加版本号，以方便各节点确定更新后的网络设置帧。例如，边缘路由器每次接收到新的网络设置参数时，则根据新的网络设置参数重新生成网络设置帧，并将网络设置帧中的版本号+1；各节点根据版本号最大的网络设置帧确定采样周期、发送聚合帧的截止时间等，或者，各节点可以将版本号较小的网络设置帧删除，仅保留版本号最大的网络设置帧。又例如，边缘路由器也可以根据生成网络设置帧的时间生成版本号，各节点则将时间最近的网络设置帧确定为最新版本的网络设置帧。
具体地，网络设置帧的格式可以如图14至图17所示，此处不再赘述。
基于相同的技术构思，本申请实施例还提供了一种第一转发节点设备，用于实现上述帧聚合方法实施例。该第一转发节点设备可以应用于Wi-SUN FAN中，Wi-SUN FAN包括第一转发节点设备、第一节点设备和第二节点设备。
参见图19，该第一转发节点设备可以包括接收单元1901、确定单元1902、生成单元1903以及发送单元1904。
具体地，接收单元1901用于接收第一节点设备发送的第一数据帧和第二节点设备发送的第二数据帧，第一数据帧包括第一MAC头和第一MSDU，第二数据帧包括第二MAC头和第二MSDU。
确定单元1902用于确定第一MAC头中的目的MAC地址与第二MAC头中的目的MAC地址是否相同。
当确定单元1902确定第一MAC头中的目的MAC地址与第二MAC头中的目的MAC地址相同时，生成单元1903用于设备根据第一数据帧和第二数据帧生成第一聚合帧，第一聚合帧包括第一聚合MAC头和第一聚合MSDU，第一聚合MAC头中的目的MAC地址与第一MAC头中的目的MAC地址或第二MAC头中的目的MAC地址相同，第一聚合MSDU包括第一子MSDU和第二子MSDU，第一子MSDU包括第一MSDU和第一MAC头中的源MAC地址，第二子MSDU包括第二MSDU和第二MAC头中的源MAC地址；
发送单元1904用于向第二转发节点设备发送第一聚合帧。
在一种可能的实现方式中，第一节点设备是叶节点设备或中间转发节点设备，第二节点设备是叶节点设备或中间转发节点设备，第一节点设备、第二节点设备和第一转发节点设备属于第一簇，Wi-SUN FAN包括该第一簇。
当第一节点设备是中间转发节点设备时，第一数据帧是数据帧或聚合帧。
当第二节点设备是中间转发节点设备时，第二数据帧是数据帧或聚合帧。
在一种可能的实现方式中，第一节点设备是簇头转发节点设备，第一数据帧是聚合帧，第二节点设备和第一转发节点设备属于第一簇，第一节点设备属于第二簇，Wi-SUN FAN包括第一簇和第二簇，第一簇与第二簇不是同一个簇。
在一种可能的实现方式中，第一转发节点设备是中间转发节点设备，第二转发节点设备是簇头转发节点设备或中间转发节点设备，第一转发节点设备与第二转发节点设备在同一个簇中，Wi-SUN FAN包括该第二转发节点设备。
在一种可能的实现方式中，第一转发节点设备是簇头转发节点设备，第二转发节点设 备是中间转发节点设备或簇头转发节点设备，第一转发节点设备和第二转发节点设备在不同的簇中，Wi-SUN FAN包括该第二转发节点设备。
在一种可能的实现方式中，第一转发节点设备是簇头转发节点设备，第二转发节点设备是边缘路由器，边缘路由器位于上述Wi-SUN FAN之外。
在一种可能的实现方式中，第一转发节点设备是簇头转发节点设备，接收单元1901还用于接收来自边缘路由器的网络设置帧，网络设置帧用于指示第一转发节点设备上报第一聚合帧的时间、第一节点设备和第二节点设备的数据采集时间。
确定单元1902还用于根据所述网络设置帧确定上报所述第一聚合帧的截止时间。
发送单元1904具体用于：根据所述截止时间时向所述第二转发节点设备发送所述第一聚合帧。
在一种可能的实现方式中，所述网络设置帧包括网络设置时间戳、簇跳数和采样周期，所述网络设置时间戳用于确定采样周期的基准时间，所述簇跳数表示发送所述网络设置帧的所述边缘路由器到目的节点设备所在簇的跳数，所述采样周期用于指示所述第一节点设备和所述第二节点设备按照所述采样周期采集数据。
确定单元1902在根据所述网络设置帧确定上报所述第一聚合帧的截止时间时，具体用于：根据所述网络设置时间戳和采样周期获得第一时间；在所述第一时间中去除所述簇跳数个截止时间梯度，获得所述截止时间，其中，所述截止时间梯度用于指示所述第一转发节点设备将所述第一聚合帧发送到所述第一转发节点设备所在的簇之外的转发节点设备的时间；将所述网络设置帧中的所述簇跳数加1。
在一种可能的实现方式中，所述第一子MSDU和所述第二子MSDU均包括长度字段，所述长度字段用于指示子MSDU的长度。
基于相同的技术构思，本申请实施例还提供了一种第一转发节点设备，用于实现上述帧聚合方法实施例。该第一转发节点设备可以应用于Wi-SUN FAN中，Wi-SUN FAN包括第一转发节点设备、第一节点设备和第二节点设备。
图20为本申请实施例提供的第一转发节点设备的硬件结构示意图，该第一转发节点设备可以包括处理器2001，存储器2002、接口2003和总线2004；其中接口2003可以通过无线或有线的方式实现，具体来讲可以是网卡。上述处理器2001、存储器2002和接口2003通过总线2004连接。
所述接口2003具体可以包括发送器和接收器，用于第一转发节点设备与上述实施例中的第一节点设备、第二节点设备、第二转发节点设备之间收发信息。作为举例，所述接口2003用于支持图5中的步骤501和503。所述处理器2001用于执行上述实施例中由第一转发节点设备进行的处理。作为举例，所述处理器2001用于支持图5中的步骤502。存储器2002包括操作系统20021和应用程序20022，用于存储程序、代码或指令，当处理器或硬件设备执行这些程序、代码或指令时可以完成方法实施例中涉及第一转发节点设备的处理过程。可选的，所述存储器2002可以包括只读存储器(read-only memory，ROM)和随机存取存储器(random access memory，RAM)。其中，所述ROM包括基本输入/输出系统(basic input/output system，BIOS)或嵌入式系统；所述RAM包括应用程序和操作系统。当需要运行第一转发节点设备时，通过固化在ROM中的BIOS或者嵌入式系统中的bootloader引导系统进行启动，引导第一转发节点设备进入正常运行状态。在第一转发节点设备进入正常运行状态后，运行在RAM中的应用程序和操作系统，从而，完成方法实施例中涉及第一转发 节点设备的处理过程。
可以理解的是，图20仅仅示出了第一转发节点设备的简化设计。在实际应用中，第一转发节点设备可以包含任意数量的接口，处理器或者存储器。
图21为本申请实施例的另一种第一转发节点设备的硬件结构示意图。图21所示的第一转发节点设备可以执行上述帧聚合方法实施例中第一转发节点设备执行的相应步骤。
如图21所述，第一转发节点设备包括：主控板2110、接口板2130、交换网板2120和接口板2140。主控板2110、接口板2130和2140，以及交换网板2120之间通过系统总线与系统背板相连实现互通。其中，主控板2110用于完成系统管理、设备维护、协议处理等功能。交换网板2120用于完成各接口板(接口板也称为线卡或业务板)之间的数据交换。接口板2130和2140用于提供各种业务接口，并实现数据包的转发。
接口板2130可以包括中央处理器2131、转发表项存储器2134、物理接口卡2133和网络处理器2132。其中，中央处理器2131用于对接口板进行控制管理并与主控板上的中央处理器进行通信。转发表项存储器2134用于保存转发表项。物理接口卡2133用于完成数据帧的接收和发送。网络存储器2132用于根据所述转发表项控制物理接口卡2133收发数据帧。
具体的，物理接口卡2133接收第一数据帧和第二数据帧，并且经由中央处理器2131向主控板2110上的中央处理器2111发送所述第一数据帧和第二数据帧。中央处理器2111用于获取所述第一数据帧和第二数据帧并生成第一聚合帧。物理接口卡2133还用于向所述第二转发节点设备发送第一聚合帧。
中央处理器2131还用于控制网络存储器2132获取转发表项存储器2134中的转发表项，并且，中央处理器2131还用于控制网络存储器2132经由物理接口卡2133完成数据帧的接收和发送。
应理解，本发明实施例中接口板2140上的操作与所述接口板2130的操作一致，为了简洁，不再赘述。应理解，本实施例的第一转发节点设备可对应于上述帧聚合方法实施例所具有的功能和/或所实施的各种步骤，在此不再赘述。
此外，需要说明的是，主控板可能有一块或多块，有多块的时候可以包括主用主控板和备用主控板。接口板可能有一块或多块，第一转发节点设备的数据处理能力越强，提供的接口板越多。接口板上的物理接口卡也可以有一块或多块。交换网板可能没有，也可能有一块或多块，有多块的时候可以共同实现负荷分担冗余备份。在集中式转发架构下，第一转发节点设备可以不需要交换网板，接口板承担整个系统的业务数据的处理功能。在分布式转发架构下，第一转发节点设备可以有至少一块交换网板，通过交换网板实现多块接口板之间的数据交换，提供大容量的数据交换和处理能力。所以，分布式架构的第一转发节点设备的数据接入和处理能力要大于集中式架构的设备。具体采用哪种架构，取决于具体的组网部署场景，此处不做任何限定。
图22为本申请实施例提供的又一第一转发节点设备的硬件结构示意图。图22所示的第一转发节点设备可以执行上述实施例的方法中第一转发节点设备执行的相应步骤。
第一转发节点设备的这种产品形态适用于基于控制与转发分离的网络架构(例如，软件定义网络(software defined network，SDN))。在SDN中，如图21所示的第一转发节点设备的主控板2110从设备中分离出来，形成新的独立的物理设备(即如图22所示的控制器2110A)，剩下的形成另一独立的物理设备(即如图22所示的第一转发子设备2100A)。控制器2110A与第一转发子设备2100A通过控制通道协议实现交互。控制通道协议可以是开放 流(open flow)协议、路径计算通信协议(path computation element communication protocol，PCEP)、边界网关协议(border gateway protocol，BGP)、路由系统接口(interface to the routing system，I2RS)等。也就是说，与上述图21所对应的实施例相比，本实施中的第一转发节点设备包括分离出去的控制器2110A和第一转发子设备2100A。
控制器2110A可以是基于通用的物理服务器实现或者是专用的硬件结构实现，在一个设计示例中，所述控制器包括接收器、处理器、发送器、RAM、ROM以及总线(图中未示出)。其中，处理器通过总线分别耦接接收器、发送器、RAM以及ROM。其中，当需要运行控制器时，通过固化在ROM中的BIOS或者嵌入式系统中的bootloader引导系统进行启动，引导控制器进入正常运行状态。在控制器进入正常运行状态后，在RAM中运行应用程序和操作系统，使得该处理器执行上述图21中主控板2110的所有功能和步骤。
第一转发子设备2100A可以是基于专用的硬件结构实现，其功能和结构与上述图21中的接口板2130、接口板2140和交换网板2120的功能和结构保持一致，执行相应的功能和步骤。也可以是基于通用的物理服务器和网络功能虚拟化(network function virtualization，NFV)技术实现的虚拟第一转发子设备，所述虚拟第一转发子设备为虚拟路由器。在虚拟第一转发子设备的场景下，上述实体第一转发子设备实施例中提到的该第一转发子设备包括接口板、交换网板以及处理器在虚拟环境下可以认为是其所基于通用的物理服务器分配给该虚拟第一转发子设备所使用的接口资源、网络资源以及处理资源。采用通用物理服务器实施该第一转发子设备的功能或步骤，或者采用通用物理服务器并利用NFV技术实施该第一转发子设备的功能或步骤具体可以参考图20的实施例。
应理解，本实施例中第一转发节点设备中的控制器2110A和该第一转发子设备2100A可以实现方法实施例中的第一转发节点设备所实施的各种功能、步骤，为了简洁，在此不再赘述。
基于相同的技术构思，本申请实施例还提供了一种边缘路由器，用于实现上述网络设置帧发送方法实施例。参见图23，本申请实施例提供的边缘路由器可以包括获取单元2301、生成单元2302和发送单元2303。
具体地，获取单元2301用于获取网络设置参数，所述网络设置参数包括采样周期，所述采样周期用于指示节点设备按照所述采样周期采集数据。
生成单元2302用于根据所述网络设置参数生成网络设置帧，所述网络设置帧中包括网络设置时间戳、簇跳数和所述采样周期，所述网络设置时间戳用于确定采样周期的基准时间，所述簇跳数表示发送所述网络设置帧的所述边缘路由器到目的节点设备所在簇的跳数。
发送单元2303用于向簇头转发节点设备发送所述网络设置帧，所述簇头转发节点设备位于Wi-SUN FAN中的第一簇中，所述第一簇经由所述簇头转发节点设备与所述边缘路由器通信。
在一种可能的实现方式中，所述网络设置参数还包括采样时间提前量，所述采样时间提前量用于指示节点设备在一个采样周期中的采样时间；所述网络设置帧中还包括所述采样时间提前量。
在一种可能的实现方式中，所述获取单元2301还用于：所述边缘路由器接收所述簇头转发节点设备发送的聚合帧。所述聚合帧是通过对第一节点设备发送的第一数据帧和第二节点设备发送的第二数据帧进行聚合得到的，其中，所述第一节点设备和所述第二节点设备属于Wi-SUN FAN，所述第一数据帧包括第一介质访问控制MAC头和第一MAC业务数据 单元MSDU，所述第二数据帧包括第二MAC头和第二MSDU，所述第一MAC头中的目的MAC地址与所述第二MAC头中的目的MAC地址相同，所述第一聚合帧包括第一聚合MAC头和第一聚合MSDU，所述第一聚合MAC头中的目的MAC地址与所述第一MAC头中的目的MAC地址或所述第二MAC头中的目的MAC地址相同，所述第一聚合MSDU包括第一子MSDU和第二子MSDU，所述第一子MSDU包括所述第一MSDU和所述第一MAC头中的源MAC地址，所述第二子MSDU包括所述第二MSDU和所述第二MAC头中的源MAC地址。
基于相同的技术构思，本申请实施例还提供了一种边缘路由器，用于实现上述网络设置帧发送方法实施例。
图24为本申请实施例提供的边缘路由器的硬件结构示意图，该边缘路由器可以包括处理器2401，存储器2402、接口2403和总线2404；其中接口2403可以通过无线或有线的方式实现，具体来讲可以是网卡。上述处理器2401、存储器2402和接口2403通过总线2404连接。
所述接口2403具体可以包括发送器和接收器，用于边缘路由器与上述实施例中的簇头转发节点设备之间收发信息。所述处理器2401用于执行上述实施例中由边缘路由器进行的处理。存储器2402包括操作系统24021和应用程序24022，用于存储程序、代码或指令，当处理器或硬件设备执行这些程序、代码或指令时可以完成方法实施例中涉及边缘路由器的处理过程。可选的，所述存储器2402可以包括ROM和RAM。其中，所述ROM包括BIOS或嵌入式系统；所述RAM包括应用程序和操作系统。当需要运行边缘路由器时，通过固化在ROM中的BIOS或者嵌入式系统中的bootloader引导系统进行启动，引导边缘路由器进入正常运行状态。在边缘路由器进入正常运行状态后，运行在RAM中的应用程序和操作系统，从而，完成方法实施例中涉及边缘路由器的处理过程。
可以理解的是，图24仅仅示出了边缘路由器的简化设计。在实际应用中，边缘路由器可以包含任意数量的接口，处理器或者存储器。
图25为本申请实施例的另一种边缘路由器的硬件结构示意图。图25所示的边缘路由器可以执行上述网络设置帧发送方法实施例中边缘路由器执行的相应步骤。
如图25所述，边缘路由器包括：主控板2510、接口板2530、交换网板2520和接口板2540。主控板2510、接口板2530和2540，以及交换网板2520之间通过系统总线与系统背板相连实现互通。其中，主控板2510用于完成系统管理、设备维护、协议处理等功能。交换网板2520用于完成各接口板(接口板也称为线卡或业务板)之间的数据交换。接口板2530和2540用于提供各种业务接口，并实现数据包的转发。
接口板2530可以包括中央处理器2531、转发表项存储器2534、物理接口卡2533和网络处理器2532。其中，中央处理器2531用于对接口板进行控制管理并与主控板上的中央处理器进行通信。转发表项存储器2534用于保存转发表项。物理接口卡2533用于完成网络设置帧发送以及聚合帧的接收。网络存储器2532用于根据所述转发表项控制物理接口卡2133收发网络设置帧或聚合帧。
具体的，物理接口卡2533可以接收来自上层应用的网络设置参数，并且经由中央处理器2531向主控板2510上的中央处理器2511发送所述网络设置参数。中央处理器2511用于获取网络设置参数并生成网络设置帧。物理接口卡2533还用于向所述簇头转发节点设备发送网络设置帧。
中央处理器2531还用于控制网络存储器2532获取转发表项存储器2534中的转发表项，并且，中央处理器2531还用于控制网络存储器2532经由物理接口卡2533完成数据帧的接收 和发送。
应理解，本发明实施例中接口板2540上的操作与所述接口板2530的操作一致，为了简洁，不再赘述。应理解，本实施例的边缘路由器可对应于上述网络设置发送方法实施例所具有的功能和/或所实施的各种步骤，在此不再赘述。
此外，需要说明的是，主控板可能有一块或多块，有多块的时候可以包括主用主控板和备用主控板。接口板可能有一块或多块，边缘路由器的数据处理能力越强，提供的接口板越多。接口板上的物理接口卡也可以有一块或多块。交换网板可能没有，也可能有一块或多块，有多块的时候可以共同实现负荷分担冗余备份。在集中式转发架构下，边缘路由器可以不需要交换网板，接口板承担整个系统的业务数据的处理功能。在分布式转发架构下，边缘路由器可以有至少一块交换网板，通过交换网板实现多块接口板之间的数据交换，提供大容量的数据交换和处理能力。所以，分布式架构的边缘路由器的数据接入和处理能力要大于集中式架构的设备。具体采用哪种架构，取决于具体的组网部署场景，此处不做任何限定。
图26为本申请实施例提供的又一边缘路由器的硬件结构示意图。图26所示的边缘路由器可以执行上述实施例的方法中边缘路由器执行的相应步骤。
边缘路由器的这种产品形态适用于基于控制与转发分离的网络架构(例如，软件定义网络(software defined network，SDN))。在SDN中，如图25所示的边缘路由器的主控板2510从设备中分离出来，形成新的独立的物理设备(即如图26所示的控制器2510A)，剩下的形成另一独立的物理设备(即如图26所示的第一转发子设备2500A)。控制器2510A与边缘路由器2500A通过控制通道协议实现交互。控制通道协议可以是开放流协议、PCEP、BGP、I2RS等。也就是说，与上述图25所对应的实施例相比，本实施中的边缘路由器包括分离出去的控制器2510A和第一转发子设备2500A。
控制器2510A可以是基于通用的物理服务器实现或者是专用的硬件结构实现，在一个设计示例中，所述控制器包括接收器、处理器、发送器、RAM、ROM以及总线(图中未示出)。其中，处理器通过总线分别耦接接收器、发送器、RAM以及ROM。其中，当需要运行控制器时，通过固化在ROM中的BIOS或者嵌入式系统中的bootloader引导系统进行启动，引导控制器进入正常运行状态。在控制器进入正常运行状态后，在RAM中运行应用程序和操作系统，使得该处理器执行上述图25中主控板2510的所有功能和步骤。
第一转发子设备2500A可以是基于专用的硬件结构实现，其功能和结构与上述图25中的接口板2530、接口板2540和交换网板2520的功能和结构保持一致，执行相应的功能和步骤。也可以是基于通用的物理服务器和NFV技术实现的虚拟第一转发子设备，所述虚拟第一转发子设备为虚拟路由器。在虚拟第一转发子设备的场景下，上述实体边缘路由器实施例中提到的该第一转发子设备包括接口板、交换网板以及处理器在虚拟环境下可以认为是其所基于通用的物理服务器分配给该虚拟第一转发子设备所使用的接口资源、网络资源以及处理资源。采用通用物理服务器实施该第一转发子设备的功能或步骤，或者采用通用物理服务器并利用NFV技术实施该第一转发子设备的功能或步骤具体可以参考图24的实施例。
应理解，本实施例中边缘路由器中的控制器2510A和该第一转发子设备2500A可以实现方法实施例中的边缘路由器所实施的各种功能、步骤，为了简洁，在此不再赘述。
基于相同的技术构思，本申请实施例还提供了一种Wi-SUN FAN，该Wi-SUN FAN包 括至少一个第一转发节点设备。其中第一转发节点设备可以为上述任一实施例中的第一转发节点设备。
基于相同的技术构思，本申请实施例还提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机指令，当所述指令在计算机上运行时，使得计算机执行上述帧聚合、网络设置帧发送方法中的任一实施例。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (25)

  1. 一种帧聚合方法，其特征在于，所述方法应用于无线智能泛在网络Wi-SUN场域网FAN中，所述Wi-SUN FAN包括第一转发节点设备、第一节点设备和第二节点设备，所述方法包括：
    所述第一转发节点设备接收所述第一节点设备发送的第一数据帧和所述第二节点设备发送的第二数据帧，所述第一数据帧包括第一介质访问控制MAC头和第一MAC业务数据单元MSDU，所述第二数据帧包括第二MAC头和第二MSDU；
    所述第一转发节点设备确定所述第一MAC头中的目的MAC地址与所述第二MAC头中的目的MAC地址相同，所述第一转发节点设备根据所述第一数据帧和所述第二数据帧生成第一聚合帧，所述第一聚合帧包括第一聚合MAC头和第一聚合MSDU，所述第一聚合MAC头中的目的MAC地址与所述第一MAC头中的目的MAC地址或所述第二MAC头中的目的MAC地址相同，所述第一聚合MSDU包括第一子MSDU和第二子MSDU，所述第一子MSDU包括所述第一MSDU和所述第一MAC头中的源MAC地址，所述第二子MSDU包括所述第二MSDU和所述第二MAC头中的源MAC地址；
    所述第一转发节点设备向第二转发节点设备发送所述第一聚合帧。
  2. 如权利要求1所述的方法，其特征在于，所述第一节点设备是叶节点设备或中间转发节点设备，所述第二节点设备是叶节点设备或中间转发节点设备，所述第一节点设备、所述第二节点设备和所述第一转发节点设备属于第一簇，所述Wi-SUN FAN包括所述第一簇；
    当所述第一节点设备是中间转发节点设备时，所述第一数据帧是数据帧或聚合帧；
    当所述第二节点设备是中间转发节点设备时，所述第二数据帧是数据帧或聚合帧。
  3. 如权利要求1所述的方法，其特征在于，所述第一节点设备是簇头转发节点设备，所述第一数据帧是聚合帧，所述第二节点设备和所述第一转发节点设备属于第一簇，所述第一节点设备属于第二簇，所述Wi-SUN FAN包括所述第一簇和所述第二簇，所述第一簇与所述第二簇不是同一个簇。
  4. 如权利要求1-3任一项所述的方法，其特征在于，所述第一转发节点设备是中间转发节点设备，所述第二转发节点设备是簇头转发节点设备或中间转发节点设备，所述第一转发节点设备与所述第二转发节点设备在同一个簇中，所述Wi-SUN FAN包括所述第二转发节点设备。
  5. 如权利要求1-3任一项所述的方法，其特征在于，所述第一转发节点设备是簇头转发节点设备，所述第二转发节点设备是中间转发节点设备或簇头转发节点设备，所述第一转发节点设备和所述第二转发节点设备在不同的簇中，所述Wi-SUN FAN包括所述第二转发节点设备。
  6. 如权利要求1-3任一项所述的方法，其特征在于，所述第一转发节点设备是簇头转发节点设备，所述第二转发节点设备是边缘路由器，所述边缘路由器位于所述Wi-SUN FAN之外。
  7. 如权利要求1-3任一项所述的方法，其特征在于，所述第一转发节点设备是簇头转发节点设备，所述方法还包括：
    所述第一转发节点设备接收来自边缘路由器的网络设置帧，所述网络设置帧用于指示 所述第一转发节点设备上报所述第一聚合帧的时间和所述第一节点设备和所述第二节点设备的数据采集时间；
    所述第一转发节点设备根据所述网络设置帧确定上报所述第一聚合帧的截止时间；
    所述第一转发节点设备向第二转发节点设备发送所述第一聚合帧包括：所述第一转发节点设备根据所述截止时间时向所述第二转发节点设备发送所述第一聚合帧。
  8. 如权利要求7所述的方法，其特征在于，所述网络设置帧包括网络设置时间戳、簇跳数和采样周期，所述网络设置时间戳用于确定采样周期的基准时间，所述簇跳数表示发送所述网络设置帧的所述边缘路由器到目的节点设备所在簇的跳数，所述采样周期用于指示所述第一节点设备和所述第二节点设备按照所述采样周期采集数据；
    所述第一转发节点设备根据所述网络设置帧确定上报所述第一聚合帧的截止时间，包括：
    所述第一转发节点设备根据所述网络设置时间戳和采样周期获得第一时间；
    所述第一转发节点设备在所述第一时间中去除所述簇跳数个截止时间梯度，获得所述截止时间，其中，所述截止时间梯度用于指示所述第一转发节点设备将所述第一聚合帧发送到所述第一转发节点设备所在的簇之外的转发节点设备的时间；
    所述第一转发节点设备将所述网络设置帧中的所述簇跳数加1。
  9. 如权利要求1-8任一项所述的方法，其特征在于，所述第一子MSDU和所述第二子MSDU均包括长度字段，所述长度字段用于指示子MSDU的长度。
  10. 一种网络设置帧发送方法，其特征在于，包括：
    边缘路由器获取网络设置参数，所述网络设置参数包括采样周期，所述采样周期用于指示节点设备按照所述采样周期采集数据；
    所述边缘路由器根据所述网络设置参数生成网络设置帧，所述网络设置帧中包括网络设置时间戳、簇跳数和所述采样周期，所述网络设置时间戳用于确定采样周期的基准时间，所述簇跳数表示发送所述网络设置帧的所述边缘路由器到目的节点设备所在簇的跳数；
    所述边缘路由器向簇头转发节点设备发送所述网络设置帧，所述簇头转发节点设备位于无线智能泛在网络Wi-SUN场域网FAN中的第一簇中，所述第一簇经由所述簇头转发节点设备与所述边缘路由器通信。
  11. 如权利要求10所述的方法，其特征在于，所述网络设置参数还包括采样时间提前量，所述采样时间提前量用于指示节点设备在一个采样周期中的采样时间；
    所述网络设置帧中还包括所述采样时间提前量。
  12. 如权利要求10或11所述的方法，其特征在于，所述方法还包括：
    所述边缘路由器接收所述簇头转发节点设备发送的聚合帧，所述聚合帧是通过对第一节点设备发送的第一数据帧和第二节点设备发送的第二数据帧进行聚合得到的，其中，所述第一节点设备和所述第二节点设备属于所述Wi-SUN FAN，所述第一数据帧包括第一介质访问控制MAC头和第一MAC业务数据单元MSDU，所述第二数据帧包括第二MAC头和第二MSDU，所述第一MAC头中的目的MAC地址与所述第二MAC头中的目的MAC地址相同，所述第一聚合帧包括第一聚合MAC头和第一聚合MSDU，所述第一聚合MAC头中的目的MAC地址与所述第一MAC头中的目的MAC地址或所述第二MAC头中的目的MAC地址相同，所述第一聚合MSDU包括第一子MSDU和第二子MSDU，所述第一子MSDU包括所述第一MSDU和所述第一MAC头中的源MAC地址，所述第二子MSDU包括所述第二MSDU 和所述第二MAC头中的源MAC地址。
  13. 一种第一转发节点设备，其特征在于，所述第一转发节点设备应用于无线智能泛在网络Wi-SUN场域网FAN中，所述Wi-SUN FAN包括所述第一转发节点设备、第一节点设备和第二节点设备，所述第一转发节点设备包括：
    接收器，用于接收所述第一节点设备发送的第一数据帧和所述第二节点设备发送的第二数据帧，所述第一数据帧包括第一介质访问控制MAC头和第一MAC业务数据单元MSDU，所述第二数据帧包括第二MAC头和第二MSDU；
    处理器，用于确定所述第一MAC头中的目的MAC地址与所述第二MAC头中的目的MAC地址相同，根据所述第一数据帧和所述第二数据帧生成第一聚合帧，所述第一聚合帧包括第一聚合MAC头和第一聚合MSDU，所述第一聚合MAC头中的目的MAC地址与所述第一MAC头中的目的MAC地址或所述第二MAC头中的目的MAC地址相同，所述第一聚合MSDU包括第一子MSDU和第二子MSDU，所述第一子MSDU包括所述第一MSDU和所述第一MAC头中的源MAC地址，所述第二子MSDU包括所述第二MSDU和所述第二MAC头中的源MAC地址；
    发送器，用于向第二转发节点设备发送所述第一聚合帧。
  14. 如权利要求13所述的第一转发节点设备，其特征在于，所述第一节点设备是叶节点设备或中间转发节点设备，所述第二节点设备是叶节点设备或中间转发节点设备，所述第一节点设备、所述第二节点设备和所述第一转发节点设备属于第一簇，所述Wi-SUN FAN包括所述第一簇；
    当所述第一节点设备是中间转发节点设备时，所述第一数据帧是数据帧或聚合帧；
    当所述第二节点设备是中间转发节点设备时，所述第二数据帧是数据帧或聚合帧。
  15. 如权利要求13所述的第一转发节点设备，其特征在于，所述第一节点设备是簇头转发节点设备，所述第一数据帧是聚合帧，所述第二节点设备和所述第一转发节点设备属于第一簇，所述第一节点设备属于第二簇，所述Wi-SUN FAN包括所述第一簇和所述第二簇，所述第一簇与所述第二簇不是同一个簇。
  16. 如权利要求13-15任一项所述的第一转发节点设备，其特征在于，所述第一转发节点设备是中间转发节点设备，所述第二转发节点设备是簇头转发节点设备或中间转发节点设备，所述第一转发节点设备与所述第二转发节点设备在同一个簇中，所述Wi-SUN FAN包括所述第二转发节点设备。
  17. 如权利要求13-15任一项所述的第一转发节点设备，其特征在于，所述第一转发节点设备是簇头转发节点设备，所述第二转发节点设备是中间转发节点设备或簇头转发节点设备，所述第一转发节点设备和所述第二转发节点设备在不同的簇中，所述Wi-SUN FAN包括所述第二转发节点设备。
  18. 如权利要求13-15任一项所述的第一转发节点设备，其特征在于，所述第一转发节点设备是簇头转发节点设备，所述第二转发节点设备是边缘路由器，所述边缘路由器位于所述Wi-SUN FAN之外。
  19. 如权利要求13-15任一项所述的第一转发节点设备，其特征在于，所述第一转发节点设备是簇头转发节点设备；
    所述接收器还用于：接收来自边缘路由器的网络设置帧，所述网络设置帧用于指示所述第一转发节点设备上报所述第一聚合帧的时间和所述第一节点设备和所述第二节点设 备的数据采集时间；
    所述处理器还用于：根据所述网络设置帧确定上报所述第一聚合帧的截止时间；
    所述发送器具体用于：根据所述截止时间时，通过所述收发器向所述第二转发节点设备发送所述第一聚合帧。
  20. 如权利要求19所述的第一转发节点设备，其特征在于，所述网络设置帧包括网络设置时间戳、簇跳数和采样周期，所述网络设置时间戳用于确定采样周期的基准时间，所述簇跳数表示发送所述网络设置帧的所述边缘路由器到目的节点设备所在簇的跳数，所述采样周期用于指示所述第一节点设备和所述第二节点设备按照所述采样周期采集数据；
    所述处理器在根据所述网络设置帧确定上报所述第一聚合帧的截止时间时，具体用于：
    根据所述网络设置时间戳和采样周期获得第一时间；
    在所述第一时间中去除所述簇跳数个截止时间梯度，获得所述截止时间，其中，所述截止时间梯度用于指示所述第一转发节点设备将所述第一聚合帧发送到所述第一转发节点设备所在的簇之外的转发节点设备的时间；
    将所述网络设置帧中的所述簇跳数加1。
  21. 如权利要求13-20任一项所述的第一转发节点设备，其特征在于，所述第一子MSDU和所述第二子MSDU均包括长度字段，所述长度字段用于指示子MSDU的长度。
  22. 一种边缘路由器，其特征在于，包括：
    处理器，用于根据获取到的网络设置参数生成网络设置帧，所述网络设置参数包括采样周期，所述采样周期用于指示节点设备按照所述采样周期采集数据，所述网络设置帧中包括网络设置时间戳、簇跳数和所述采样周期，所述网络设置时间戳用于确定采样周期的基准时间，所述簇跳数表示发送所述网络设置帧的所述边缘路由器到目的节点设备所在簇的跳数；
    发送器，用于向簇头转发节点设备发送所述网络设置帧，所述簇头转发节点设备位于无线智能泛在网络Wi-SUN场域网FAN中的第一簇中，所述第一簇经由所述簇头转发节点设备与所述边缘路由器通信。
  23. 如权利要求22所述的边缘路由器，其特征在于，所述网络设置参数还包括采样时间提前量，所述采样时间提前量用于指示节点设备在一个采样周期中的采样时间；
    所述网络设置帧中还包括所述采样时间提前量。
  24. 如权利要求22或23所述的边缘路由器，其特征在于，所述处理器还包括：
    接收器，用于接收所述簇头转发节点设备发送的聚合帧，所述聚合帧是通过对第一节点设备发送的第一数据帧和第二节点设备发送的第二数据帧进行聚合得到的，其中，所述第一节点设备和所述第二节点设备属于所述Wi-SUN FAN，所述第一数据帧包括第一介质访问控制MAC头和第一MAC业务数据单元MSDU，所述第二数据帧包括第二MAC头和第二MSDU，所述第一MAC头中的目的MAC地址与所述第二MAC头中的目的MAC地址相同，所述第一聚合帧包括第一聚合MAC头和第一聚合MSDU，所述第一聚合MAC头中的目的MAC地址与所述第一MAC头中的目的MAC地址或所述第二MAC头中的目的MAC地址相同，所述第一聚合MSDU包括第一子MSDU和第二子MSDU，所述第一子MSDU包括所述第一MSDU和所述第一MAC头中的源MAC地址，所述第二子MSDU包括所述第二MSDU和所述第二MAC头中的源MAC地址。
  25. 一种无线智能泛在网络Wi-SUN场域网FAN，其特征在于，所述Wi-SUN FAN包括 第一转发节点设备，所述第一转发节点设备为权利要求13-21中任一项所述的第一转发节点设备。
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