CN111786718A - Satellite optical network management and control plane signaling transmission method based on AoS insertion service - Google Patents
Satellite optical network management and control plane signaling transmission method based on AoS insertion service Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18515—Transmission equipment in satellites or space-based relays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
Abstract
The invention discloses a satellite optical network management and control plane signaling transmission method based on an AoS insertion service, which comprises the following steps: step one, a source node generates and sends a transmission packet; step two, the forwarding node receives and forwards the transmission packet; step three, repeating the step two until the transmission packet reaches the destination node or the transmission packet is deleted; step four: and the destination node decapsulates the transmission packet to obtain a management control signaling. The invention designs a transmission packet supporting end-to-end transmission of management control signaling on a satellite network with dynamically changed topology and a using method thereof. The invention designs an embedded channel supporting point-to-point transmission of transmission packets on an intermittent communication link. The invention solves the problem that the management control signaling transmission depends on the protocol above the network layer and is not suitable for the satellite optical network, and can support the construction of the satellite optical network based on the ASON technology. The invention is designed based on the AoS protocol, utilizes the AOS protocol to be specially designed for the spatial link, can adapt to the characteristics of high time delay, high error code and the like of spatial link information transmission, and realizes more reliable transmission.
Description
Technical Field
The invention belongs to the field of satellite optical networks, and relates to a transmission method for transmitting signaling of a management plane and a control plane between nodes of a satellite optical network by inserting a service transmission satellite optical network by using an Advanced orbital System (AoS) space link protocol.
Background
The laser inter-satellite link has the characteristics of large communication capacity, strong anti-interference capability and the like, the establishment of a backbone network by adopting the satellite optical network with the laser inter-satellite link as a main body is a necessary trend for the development of space communication, and at present, related tests for establishing a high-speed communication network by adopting the laser inter-satellite link are developed in part of engineering models. The dynamic response capability and the safety and reliability of the satellite Optical Network can be effectively improved by adopting an Automatic Switched Optical Network (ASON) technology. The ASON technology adopts a distributed control mode to automatically complete resource allocation and connection management, and is considered as a key technology of the next generation optical transport network. The functional architecture of a satellite optical network using the ASON technology may be divided into a transport plane, a control plane, and a management plane. The control plane is composed of control plane modules distributed at each network node and is responsible for interaction and processing of control signaling in the processes of path establishment, maintenance, removal and the like; the management plane is composed of a network management center and a management plane module positioned at each network node and is responsible for interaction and processing of management signaling such as state monitoring, parameter collection, error processing and the like in the network operation process; the transport plane consists of transport plane modules and input/output ports distributed at the respective network nodes, providing unidirectional or bidirectional transport of end-to-end user traffic flows.
ASON completes the transmission of control plane signaling and management plane signaling through a Data Communication Network (DCN). The DCN is a network supporting functions of a physical layer, a data link layer and a network layer, and research and application of the existing DCN mainly aim at a terrestrial optical transport network, and a transport mode, a protocol encapsulation and the like of the DCN mainly support an OSI protocol, an IP protocol and an MPLS protocol. Due to the reasons of dynamic change of satellite network topology, limited satellite node resources, large difference of different constellation configurations and the like, a ground network protocol is not completely suitable for a satellite network, a satellite network layer and the protocols above do not form a universal standard or specification, and accordingly, the existing ground DCN management and control signaling transmission method is not suitable for the satellite network. At present, a satellite node Data link layer protocol generally adopts a CCSDS (conditional Committee for Space Data Systems, spatial Data System counseling Committee) protocol System, wherein an AoS (Advanced orbital System) spatial link protocol is based on a CCSDS standard, serves a satellite-satellite and satellite-ground measurement and control communication and Data management System, can adapt to the characteristics of high time delay, high error code and the like of spatial link information transmission, is a main link layer protocol adopted by measurement and control communication and Data transmission of spacecrafts at home and abroad at present, but cannot provide end-to-end Data/signaling transmission service for a satellite network with dynamically changing topology.
In order to reduce the influence of uncertainty of a satellite optical network layer protocol on application of an ASON technology in a satellite optical network and improve the applicability of the ASON technology in a current main satellite platform, a method for transmitting control plane and management plane signaling between satellite nodes based on an AoS protocol insertion service is designed, is suitable for a satellite optical network with dynamically changing topology, and can realize decoupling of signaling transmission and the network layer and the protocols.
Disclosure of Invention
The invention mainly solves the problem that the management plane and the control plane signaling are transmitted between network nodes in the satellite optical network with dynamically changed topology based on the ASON technology. The invention provides a satellite optical network management and control plane signaling transmission method based on an AoS protocol insertion service, which supports end-to-end transmission of management control signaling in a satellite optical network with dynamically changed topology and can realize decoupling of signaling transmission and a network layer and above protocols.
The invention is realized by the following technical scheme.
A satellite optical network management and control plane signaling transmission method based on an AoS insertion service comprises the following steps:
step one, a source node generates and sends a management and control signaling transmission packet (transmission packet for short): the source node management plane and control plane module sends the management control signaling to the transmission plane module, the transmission plane module packages the management control signaling sent by the management plane module and the control plane module into a transmission packet and puts the transmission packet into an output port transmission packet queue, and an output port sends the transmission packet through an embedded channel formed by an AoS frame insertion domain;
step two: the forwarding node receives and forwards the transmission packet: the input port recovers a transmission packet from an embedded channel formed by an AoS frame insertion domain, the transmission packet is sent to a transmission plane module, the transmission plane module receives or forwards the transmission packet sent by the input port, if the destination address of the transmission packet is the node, the step four is carried out, if the destination address of the transmission packet is not the node, the transmission packet is forwarded according to the destination address, and if the transmission of the transmission packet is overtime, the transmission packet is deleted;
step three: repeating the second step until the transmission packet reaches the destination node or the transmission packet is deleted;
step four: the destination node de-encapsulates the transmission packet to obtain a management control signaling: and decapsulating a transmission packet with the destination node as the node into a management control signaling, sending the management control signaling into a management plane module or a control plane module, and carrying the transmission packet to be confirmed by the destination node.
Further, the invention designs a transmission packet for carrying management control signaling, and the format is shown in fig. 2. The transmission packet is 160 bytes long, and comprises fields and its main functions are as follows:
1) sync header (32 bits): for transmission packet synchronization;
2) information type (16 bits): identifying a management control signaling type;
3) sequence identification (2 bits): identifying a management control signaling split condition;
4) packet sequence count (14 bits): identifying a sequence count of the transmitted packets;
5) packet length (16 bits): identifying the effective data length of the transmission packet;
6) confirmation flag (1 bit): identifying whether the destination node needs to confirm the transmission packet;
7) reserved (11 bits): reserving;
8) maximum number of hops (4 bits): identifying a maximum number of hops of a transmission packet in a network;
9) source node address (16 bits): identifying the source node address of the transmission packet;
10) destination node address (16 bits): identifying the destination node address of the transmission packet;
11) transmission sequence number (24 bits): identifying the serial number of a transmission packet from a source node to a destination node;
12) acknowledgement sequence number (24 bits): piggybacking a transmission acknowledgement;
13) out port number (8 bits): the node sends/forwards the output port number corresponding to the transmission packet;
14) port number (8 bits): the destination node receives an input port number corresponding to the transmission packet;
15) data field (134 Bytes): managing control signaling payload data.
16) Check bit (16 bit): CRC check bits.
In the invention, the encapsulation method in the first step is an encapsulation method supporting management control signaling segmented transmission, the forwarding method in the second step is a forwarding method supporting transmission packet flooding, the decapsulation method in the fourth step is a decapsulation method supporting transmission packet out-of-order rearrangement, and the piggybacking method is a destination node transmission packet piggybacking confirmation method. The problem that the segmented transmission of the management control signaling arrives out of order due to the dynamic change of the satellite network topology, routing planning and the like is solved, and the end-to-end transmission of the management control signaling in the satellite network with the dynamic change of the topology is realized.
1) The encapsulation method for supporting the segmented transmission of the management control signaling comprises the following steps: the management control signaling is intercepted according to the sequence of 134Bytes of each segment, the segments are encapsulated into the data field of the transmission packet, and the sequence identification, the packet sequence count and the packet length field in the transmission packet header identify the segmentation and the sequencing condition of the management control signaling.
2) The forwarding method supporting the flooding of the transmission packets comprises the following steps: for the transmission packet of which the 'information type' is the flooding packet, each node generates and maintains the receiving and forwarding records thereof, wherein the receiving and forwarding records comprise information such as a source node, a sending serial number, a record validity period end time, an activated port number and the like, and the situations of repeated receiving processing and forwarding of the flooding packet are avoided.
3) The decapsulation method for supporting out-of-order rearrangement of transmission packets comprises the following steps: when receiving the transmission packet, the destination node generates a receiving cache record, which contains information such as the source node, the sending sequence number, the sequence identifier, the packet sequence count, the survival time of the record and the like. And for the segmented transmission packets, arranging the receiving cache records of the transmission packets of the same source node according to the sequence of the sending sequence number, after judging that the transmission packets split by the management control signaling are completely received through the sequence identification and the packet sequence counting, arranging and recombining the management control signaling, deleting the transmission packets and the corresponding receiving cache records which are decapsulated from the storage queue, and completing the decapsulation. If the de-encapsulation is not completed after the survival time, deleting the transmission packet and the receiving buffer record thereof.
4) The destination node transmission packet piggybacking confirmation method comprises the following steps: the acknowledgement identification field is used at the source node to identify the transport packets that require acknowledgement by the destination node. After the destination node finishes the decapsulation of the transmission packet, the destination node piggybacks the sending sequence number information of the transmission packet to be confirmed by the acknowledgement sequence number field of the transmission packet header returned to the source node, and generates a confirmation packet when no transmission packet can be piggybacked exists.
Furthermore, the invention designs an embedded channel formed based on the AoS frame insertion domain, and supports point-to-point transmission of the transmission packet on a discontinuous communication link caused by network topology change.
As shown in fig. 3, the AoS frame structure includes an insertion field having a length of N bytes, where N is greater than or equal to 16 and is an integer, and 16 consecutive bytes in the insertion field are management control fields for carrying management control signaling transmission packets. The invention uses an AoS frame insertion domain to construct a point-to-point embedded channel, in each direction of the channel, a transmission packet is divided into 10 segments of 16 bytes by an output port of a sending node, the segments are sequentially inserted into a control domain of the insertion domain of a non-idle AoS frame and sent, and the transmission packet is deleted after the sending is finished so as to avoid incomplete sending of the transmission packet caused by midway link disconnection; and extracting and splicing the non-idle AoS frame by the receiving node input port to insert the field of the control domain in the domain, recovering the transmission packet according to the transmission packet synchronization head, performing CRC (cyclic redundancy check) on the transmission packet, and discarding the check error packet.
The invention has the beneficial technical effects that:
1. the invention designs a transmission method for inserting service transmission management plane and control plane signaling by using a link layer AoS protocol, solves the problem that the management control signaling transmission depends on protocols above a network layer and is not suitable for a satellite optical network, increases the flexibility of the design of a satellite optical network protocol family adopting an ASON protocol architecture, and can support the construction of the satellite optical network based on an ASON technology.
2. The invention designs a transmission packet for transmitting management control signaling and a using method thereof, supports functions of segmented transmission of the management control signaling, flooding of the transmission packet, out-of-order rearrangement, transmission confirmation and the like, can solve the problem of out-of-order arrival of the segmented transmission of the management control signaling caused by the dynamic change of the satellite network topology, routing planning and the like, and realizes the end-to-end transmission of the management control signaling in the satellite network with the dynamic change of the topology.
3. The invention adopts the AoS protocol to insert the service to construct an embedded channel and support the point-to-point transmission of a transmission packet on a discontinuous communication link; in addition, the AoS protocol is specially designed for the spatial link, can adapt to the characteristics of high time delay, high error code and the like of spatial link information transmission, and realizes more reliable transmission; on the other hand, the AoS protocol realizes a large amount of engineering application in various types at home and abroad, and is favorable for better compatibility and intercommunication with the existing satellite system.
Drawings
FIG. 1 is a management plane and control plane signaling transmission schematic;
FIG. 2 is a diagram of a management and control signaling transport packet structure;
fig. 3 is an AoS frame structure diagram.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The transmission principle of management control signaling is shown in fig. 1, wherein, according to the ASON functional architecture, the structure of the satellite optical network node module can be divided into a management plane module, a control plane module, a transmission plane module, and an input/output port.
Management plane Module
1) Sending the management signaling and transmission information (including information type, source node address, destination node address, whether destination node confirmation is needed) of the source node as the local node and the destination node as other nodes to a transmission plane module;
2) and receiving the management signaling which is received by the transmitting plane module and takes the destination node as the node.
Control plane Module
1) Sending control signaling and transmission information (including information type, source node address, destination node address, whether destination node confirmation is needed) of a source node as the node and a destination node as other nodes to a transmission plane module;
2) receiving a control signaling which is received by a transmitting plane module and takes a destination node as the node;
3) the routing information of the control plane module needs to support the transmission plane module to inquire the address (output port) of the next hop node, wherein the ASON functional division requires the control plane to have the routing function, and the specific routing protocol and algorithm are not agreed by the patent.
Transport plane module
1) Packaging management control signaling sent by a management plane module and a control plane module into a management and control signaling transmission packet (transmission packet for short), determining an output port according to control plane routing information, and putting the transmission packet into a transmission packet queue of the corresponding output port;
2) receiving a transmission packet sent by an input port, decapsulating the transmission packet of which the destination node is the node into a management control signaling, sending the management control signaling into a management plane module or a control plane module, and confirming the transmission packet to be confirmed;
3) and receiving the transmission packet sent by the input port, deleting the transmission packet which is transmitted overtime in the network for the transmission packet of which the destination node is not the node, determining the output port of the other transmission packets according to the routing information of the control plane, and putting the output port into the transmission packet queue corresponding to the output port.
An input/output port
1) The output port transmits the transmission packets in the transmission packet queue through an embedded channel formed by an AoS frame insertion domain;
2) and the input port receives and recovers the transmission packet from the embedded channel formed by the AoS frame insertion domain and sends the transmission packet to the control plane module of the node.
The transmission method of the management control signaling comprises the following steps:
the method comprises the following steps: the source node generates and sends a transmission packet:
1) the management plane and control plane module sends the management control signaling to the transmission plane module;
2) the transmission plane module encapsulates the management control signaling sent by the management plane module and the control plane module into a transmission packet and puts the transmission packet into an output port transmission packet queue;
3) and the output port sends a transmission packet through an embedded channel formed by the AoS frame insertion domain.
Step two: the intermediate node receives and forwards the transmission packet:
1) the input port recovers transmission packets from an embedded channel formed by the AoS frame insertion domain and sends the transmission packets to the transmission plane module;
2) the transmitting plane module receives and transmits the transmission packet sent by the input port, wherein if the destination address of the transmission packet is the node, the step four is carried out; if the destination address of the transmission packet is not the node and the transmission of the transmission packet is not overtime, the transmission packet is forwarded according to the destination address, and if the transmission of the transmission packet is overtime, the transmission packet is deleted.
Step three: and repeating the second step until the transmission packet reaches the destination node or the transmission packet is deleted.
Step four: the destination node de-encapsulates the transmission packet to obtain a management control signaling:
1) the transmission packet whose destination node is the local node is unpacked into management control signaling and sent to the management plane module or the control plane module
2) And carrying out piggybacking confirmation on the transmission packet needing to be transmitted and confirmed.
The invention designs a transmission packet for transmitting management control signaling and a transmission packet using method, which comprises an encapsulation method supporting segmented transmission of the management control signaling, a forwarding method supporting flooding of the transmission packet, a decapsulation method supporting out-of-order rearrangement of the transmission packet and a destination node transmission packet piggybacking confirmation method, and can realize end-to-end transmission of the management control signaling in a satellite network with dynamically changed topology.
Transport packet format and definition
The transport packets are used for transport management plane and control plane signaling, and are 160 bytes in length as shown in fig. 3. The format and requirements of the parameters of each field are as follows, and the header length of the transmission packet is 24Bytes, and comprises fields 1) to 14):
1) sync header (32 bits): for transport packet synchronization. Different from the AoS frame synchronization header, the method specifically determines according to engineering requirements, such as fixedly filling 0xfaf 5F 5.
2) Information type (16 bits): the management control signaling type is identified. The high 8bit is the main message type, 0x00 confirms the packet, 0x01 non-flooding management signaling, 0x02 non-flooding control signaling, 0x03 flooding management signaling, 0x04 flooding control signaling, other reservations; the lower 8bit is the sub message type, which is defined specifically according to different information types, when the main message type is the confirmation packet, the message type of the confirmed packet is filled. The information type is filled according to the transmission information attached to the management control signaling.
3) Sequence identification (2 bits): and identifying the splitting condition of the management control signaling and the sequence condition of the transmission packet in the management control signaling. 00 b: data middle section, 01 b: data header, 10 b: data end, 11 b: not segmented.
4) Packet sequence count (14 bits): and identifying the sequence count of the transmission packets, and using the sequence mark in cooperation. Taking an example that a certain management control information is divided into M packets, when the sequence flag is 00b (middle section of data), the packet sequence count indicates the number of the currently transmitted transmission packet, which represents the number of the packets, and the effective range is [1, M-1 ]; when the sequence mark is 01b (data head segment), counting the packet sequence to be the total packet number of the current data sub-packet, and filling M; when the sequence flag is 10b (data end segment), the packet sequence count indicates the number of the currently transmitted transmission packet, and the last packet is M-1; when the sequence flag is 11b (not segmented), the packet sequence count is fixedly filled with 1, indicating 1 packet.
5) Packet length (16 bits): the actual length of the effective data of the transmission packet is reduced by 1, and the value range of the unit byte is 0-133 from the first byte of the data field to the end of the data.
6) Confirmation flag (1 bit): identifying whether the destination node needs to acknowledge the transmission packet. 1 b: representing a need for validation; 0 b: no acknowledgement is required on behalf of the user. The confirmation mark is filled according to the transmission information attached to the management control signaling.
7) Reserved (11 bits): and (5) reserving.
8) Maximum number of hops (4 bits): the maximum number of hops a transmission packet has in the network. The packet is discarded every time the packet passes the one-hop-this field minus 1, equals zero, and does not reach the destination node. The maximum hop count of the source node is specifically determined according to engineering and task requirements.
9) Source node address (16 bits): and identifying the source node address of the transmission packet. The low 8bit is the source node SCID (spacecraft identifier) and the high 8bit is reserved for subsequent expansion. And the source node address is filled according to the transmission information attached to the management control signaling.
10) Destination node address (16 bits): and identifying the destination node address of the transmission packet. The low 8bit is the SCID of the destination node, the high 8bit is reserved for the subsequent expansion, and the flooding message is filled to 0. The destination node address is filled according to the transmission information attached to the management control signaling.
11) Transmission sequence number (24 bits): for identifying the sequence number of the transmission packet from the source node to the destination node. The cycle count is started by 0 and maintained by the source node.
12) Acknowledgement sequence number (24 bits): when the acknowledgement mark is 1b, the field is used, the transmission sequence number of the transmission packet of which the transmission node is the destination node in the packet is de-encapsulated by the piggyback source node, the transmission packet except the flooding packet can carry the information, and if the transmission packet is insufficient, an acknowledgement packet with the main message type of 0x01 is generated to carry the information.
13) Out port number (8 bits): the node sends/forwards the output port number corresponding to the transmission packet. And filling according to the routing information.
14) Port number (8 bits): the destination node receives the port number corresponding to the transmission packet. And when the receiving port of the destination node receives the transmission packet, the number of the incoming port is filled, and the default of no configuration is all 0.
15) Data field (134 Bytes): and filling in effective data of the management control signaling. Acknowledge packet 1Byte, fill 0x 00; the rest transmission packets are filled with information payloads with the length of 1-134 bytes; less than 134bytes partially fill the Byte, e.g., 0x 5A.
16) Check bit (16 bit): CRC check bits, performing CRC check on the transmission packets except the synchronous header, and specifically determining a check algorithm according to engineering requirements, for example, a polynomial g (x) x recommended by the ISO SDLC CRC-CCITT standard can be adopted16+x15+x2+1, the initial phase is set to all "0".
Encapsulation method for supporting management control signaling segmented transmission
The control plane encapsulates the management control signaling into transport packets as shown in fig. 1. If the management control signaling is not greater than 134Bytes, loading the management control signaling into a transmission packet data domain without segmentation; if the management control signaling is larger than 134Bytes, the management control signaling needs to be segmented and encapsulated, and the management control signaling is intercepted sequentially, wherein each 134Byte is a segment and is filled in a transmission packet data domain (the part which is less than 134Bytes is filled according to the requirement of a transmission packet format). Filling the head of the transmission packet according to the format requirement of the transmission packet, wherein the sequence identification, the packet sequence count and the packet length are filled according to the sectional condition of the management control signaling.
Forwarding method supporting flooding of transport packets
The transmission plane module generates a receiving and forwarding record when receiving a certain flooding packet for the first time, maintains the record, avoids the occurrence of repeated receiving and forwarding of the flooding packet, sets a certain validity period for each record, and deletes the record after the validity period is exceeded. The flooding packet receiving and forwarding record comprises information of a source node, a sending sequence number, validity period ending time, an activated port number and the like, wherein the source node and the sending sequence number are used for indexing the flooding packet, the validity period ending time is the record generation time plus a preset validity time parameter, and the activated port number identifies the port which has sent the flooding packet.
After receiving the flooding packet whose destination address is 0 and main message type is 0x03 flooding management message or 0x04 flooding control message, the transmitting plane looks up the receiving and forwarding record of the flooding packet according to its source node and sending sequence number, if there is no record, it indicates that it is the first time to receive the flooding packet, and it does the following processing: a) generating a receiving and forwarding record of the flooding packet; b) if the source node is not the local node, filling in an 'entry port' field of a transmission packet as a receiving port, and sending the transmission packet into a storage queue for decapsulation operation; c) if the source node is not the node, adding a receiving port as an activated port in the record, subtracting 1 from the maximum hop number field in the packet head of the flooding packet, if the maximum hop number field is 0, deleting the packet, stopping the flooding forwarding, and if the maximum hop number field is more than 0, entering the next step; d) and copying the flooding packet to a transmission packet queue of all the unactivated output ports, wherein an output port field in a transmission packet header is updated to be a corresponding port, the transmission packet is rechecked, and the activated port is added in a receiving and forwarding record. If the receiving and forwarding record of the flooding packet already exists, it indicates that the flooding packet has already been received, and only operations c) -d) are performed to perform the necessary flooding forwarding.
Decapsulation method supporting out-of-order rearrangement of transport packets
And the transmission plane module decapsulates the transmission packet of which the destination node is the node into the management control signaling. Due to the dynamic change of the satellite network topology, the routing algorithm strategy and other reasons, when the management control signaling is transmitted in a packet mode, the transmission path of the transmission packet may change, so that the transmission packet at a destination node arrives from different ports out of order. In order to solve the above problems and realize the end-to-end transmission of the management control signaling, the decapsulation method is designed as follows:
when a transmission plane receives a transmission packet of which a destination node is the node, each transmission packet generates a receiving cache record containing information such as a source node, a sending sequence number, a sequence identifier, a packet sequence count, the survival time of the record and the like, and the transmission packet is decapsulated as follows:
for the non-segmented transmission packet, directly extracting the control message from the data domain according to the packet length field, deleting the transmission packet and the corresponding receiving cache record from the storage queue, and completing decapsulation;
for segmented transmission packets, arranging the receiving cache records of the transmission packets according to the sequence of the sending sequence number for the transmission packets of the same source node, after judging that the transmission packets split by the management control signaling are completely received through sequence identification and packet sequence counting, arranging and recombining the management control signaling, deleting the transmission packets and the corresponding receiving cache records which are decapsulated from the storage queue, and completing decapsulation;
if the de-encapsulation is not completed after the survival time, deleting the transmission packet and the receiving buffer record thereof.
Destination node transmission packet piggybacking confirmation method
The transmission method provides a means for confirming the transmission condition of the transmission packet, wherein the transmission packet is considered to be successfully transmitted after being de-encapsulated at a destination node. For a transport packet requiring acknowledgement, the acknowledgement identification field in its header is set to 1b at the source node. At a destination node, after confirming that the transmission packet marked as 1b is unpacked, a control plane module generates response information containing a destination address (a source address of the transmission packet to be responded to) and a sending sequence number; when the transmitting plane module generates a transmission packet corresponding to a destination address, filling a sending sequence number carried in the response information into a confirmation sequence number field of the transmission packet, and if the transmission packet of the destination address does not exist within a certain time, generating a confirmation packet with a main message type of 0x01 and carrying the information; after the completion of the filling of the serial number and the arrival of new response information are confirmed, deleting the response information; when a plurality of pieces of response information exist at the same time, the processing is carried out first, and other messages are queued up.
The invention designs an embedded channel formed based on an AoS frame insertion domain, and supports point-to-point transmission of a transmission packet on a discontinuous communication link:
AoS frame structure and insertion field design
The structure of the AoS frame is shown in fig. 3, wherein a transmission frame leader, a transmission frame data field, and a transmission frame trailer are determined by an engineering management department according to the requirement of the AoS protocol and the actual requirement of the engineering. The design of the AoS transmission frame insertion domain is that the length of the insertion domain is N bytes (N is not less than 16, N is an integer), the continuous 16 bytes in the insertion domain are control domains and used for transmitting management control signaling transmission packets, other bytes are used for other insertion services, no provision is made here, and N is fixed for a certain satellite network.
For the AoS frame in the invention, besides inserting the service, the service can also use packet, bit stream, virtual channel access, virtual channel operation control domain service, the virtual channel frame service and main channel frame service can not be used, and only one of the packet service, bit stream service and virtual channel access service can exist at the same time on one virtual channel.
Embedded channel transmission method based on AoS frame insertion domain constitution
1) And the output port of the sending node puts the transmission packet into a management and control domain of an AoS frame insertion domain for sending:
the output port of the sending node maintains a transmission packet queue for storing the transmission packets sent to the port by the transmission plane module, and the transmission packets in the transmission packet queue are arranged according to the first-in first-out sequence.
When a link from a sending node to a receiving node is established, a transmission packet (with the length of 160 bytes) at the head of the queue in a transmission packet queue is divided into 10 segments with 16 bytes, the segments are sequentially inserted into a control domain of an insertion domain of a non-idle AoS frame and sent, and the transmission packet is deleted after the transmission is finished, so that incomplete transmission of the transmission packet caused by disconnection of a midway link is avoided, and the transmission of the transmission packet on a discontinuous communication link caused by dynamic changes of network topology and the like is supported. The above operations are repeated until the link is disconnected or the transmission packet queue is emptied. Generating a non-idle AoS frame special for transmitting a transmission packet of a management control signaling for a condition that the non-idle AoS frame does not occupy a physical channel but is not enough to piggyback the transmission packet in a queue, and allocating a virtual channel for the AoS frame for a system for distinguishing the virtual channel, wherein a data field of the virtual channel is fixedly filled and can be filled according to the idle AoS frame; for the case that the non-idle frame occupies the physical channel, but is still not enough to piggyback the transmission packet in the queue, the transmission packet is queued in the queue, and the transmission packet arriving after the queue overflows is discarded.
2) And a receiving node ingress port recovers transmission packets from the AoS frame insertion domain management and control domain:
and extracting and splicing the non-idle AoS frame by the receiving node input port to insert the field of the control domain in the domain, recovering the transmission packet according to the transmission packet synchronization head, performing CRC (cyclic redundancy check) on the transmission packet, and discarding the check error packet.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. It should be noted that other equivalent modifications can be made by those skilled in the art in light of the teachings of the present invention, and all such modifications can be made as are within the scope of the present invention.
Claims (7)
1. A satellite optical network management and control plane signaling transmission method based on an AoS insertion service is characterized by comprising the following steps:
step one, a source node generates and sends a management and control signaling transmission packet: the source node management plane and control plane module sends the management control signaling to the transmission plane module, the transmission plane module packages the management control signaling sent by the management plane module and the control plane module into a transmission packet and puts the transmission packet into an output port transmission packet queue, and an output port sends the transmission packet through an embedded channel formed by an AoS frame insertion domain;
step two: the forwarding node receives and forwards the transmission packet: the input port recovers a transmission packet from an embedded channel formed by an AoS frame insertion domain, the transmission packet is sent to a transmission plane module, the transmission plane module receives or forwards the transmission packet sent by the input port, if the destination address of the transmission packet is the node, the step four is carried out, if the destination address of the transmission packet is not the node, the transmission packet is forwarded according to the destination address, and if the transmission of the transmission packet is overtime, the transmission packet is deleted;
step three: repeating the second step until the transmission packet reaches the destination node or the transmission packet is deleted;
step four: the destination node de-encapsulates the transmission packet to obtain a management control signaling: and decapsulating a transmission packet with the destination node as the node into a management control signaling, sending the management control signaling into a management plane module or a control plane module, and carrying the transmission packet to be confirmed by the destination node.
2. The method of claim 1, wherein the fields of the transport packets for transporting the management plane and the control plane signaling are a synchronization header, an information type, a sequence identifier, a packet sequence count, a packet length, an acknowledgement identifier, a reservation, a maximum hop count, a source node address, a destination node address, a transmission sequence number, an acknowledgement sequence number, an egress port number, an ingress port number, a data field, and a check bit.
3. The method according to claim 1, wherein the encapsulation method in the first step is an encapsulation method supporting segmented transmission of management control signaling.
4. The method according to claim 1, wherein the forwarding method in step two is a forwarding method supporting flooding of transmission packets, and can support flooding of management control signaling for flooding in the network.
5. The AoS insertion service-based satellite optical network management and control plane signaling transmission method according to claim 1, wherein the decapsulation method in step four is a decapsulation method supporting out-of-order rearrangement of transmission packets, and the management control signaling capable of supporting segmented transmission is transmitted end-to-end in a satellite network with dynamically changing topology.
6. The method of claim 1, wherein the piggybacking method in step four is a destination node transmission packet piggybacking method.
7. The method according to claim 1, wherein the AoS frame insertion domain is configured with a continuous 16-byte control domain, the sending end ensures complete sending, the receiving end receives and checks, and supports point-to-point transmission of the transmission packet on the intermittent communication link.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112584432A (en) * | 2020-12-15 | 2021-03-30 | 天地信息网络研究院(安徽)有限公司 | Multi-user high-speed satellite laser communication supporting method and air interface protocol |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212392A (en) * | 2006-12-30 | 2008-07-02 | 上海瑞高信息技术有限公司 | Mobile multimedia broadcast satellite distribution data encapsulation and synchronization method |
| EP2200225A1 (en) * | 2008-12-09 | 2010-06-23 | Alcatel, Lucent | Method of handling a signalling and management communication traffic |
| CN102158392A (en) * | 2010-12-13 | 2011-08-17 | 中国空间技术研究院 | Method for telemetering of advanced orbiting system (AOS) of distributed framework satellite |
| CN102801626A (en) * | 2012-08-17 | 2012-11-28 | 北京空间飞行器总体设计部 | Satellite-borne data management method and device based on AOS standard |
| US20140002813A1 (en) * | 2012-06-29 | 2014-01-02 | Dong-Young Rew | Satellite Tracking System and Method of Controlling the Same |
| CN104283604A (en) * | 2014-09-16 | 2015-01-14 | 上海卫星工程研究所 | Data transmission system and method for over-the-ground optical remote sensing satellite |
| CN108337036A (en) * | 2018-02-06 | 2018-07-27 | 西安四方星途测控技术有限公司 | A kind of inter-satellite link analogue system based on navigation satellite constellation |
| CN109981162A (en) * | 2019-03-27 | 2019-07-05 | 北京空间飞行器总体设计部 | Data processing and Transmission system suitable for inertial space pointing space astronomical satellite |
| CN110649960A (en) * | 2019-10-12 | 2020-01-03 | 四川安迪科技实业有限公司 | Satellite network message exchange method and system, and sending and receiving method and device |
-
2020
- 2020-06-11 CN CN202010526831.8A patent/CN111786718A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212392A (en) * | 2006-12-30 | 2008-07-02 | 上海瑞高信息技术有限公司 | Mobile multimedia broadcast satellite distribution data encapsulation and synchronization method |
| EP2200225A1 (en) * | 2008-12-09 | 2010-06-23 | Alcatel, Lucent | Method of handling a signalling and management communication traffic |
| CN102158392A (en) * | 2010-12-13 | 2011-08-17 | 中国空间技术研究院 | Method for telemetering of advanced orbiting system (AOS) of distributed framework satellite |
| US20140002813A1 (en) * | 2012-06-29 | 2014-01-02 | Dong-Young Rew | Satellite Tracking System and Method of Controlling the Same |
| CN102801626A (en) * | 2012-08-17 | 2012-11-28 | 北京空间飞行器总体设计部 | Satellite-borne data management method and device based on AOS standard |
| CN104283604A (en) * | 2014-09-16 | 2015-01-14 | 上海卫星工程研究所 | Data transmission system and method for over-the-ground optical remote sensing satellite |
| CN108337036A (en) * | 2018-02-06 | 2018-07-27 | 西安四方星途测控技术有限公司 | A kind of inter-satellite link analogue system based on navigation satellite constellation |
| CN109981162A (en) * | 2019-03-27 | 2019-07-05 | 北京空间飞行器总体设计部 | Data processing and Transmission system suitable for inertial space pointing space astronomical satellite |
| CN110649960A (en) * | 2019-10-12 | 2020-01-03 | 四川安迪科技实业有限公司 | Satellite network message exchange method and system, and sending and receiving method and device |
Non-Patent Citations (3)
| Title |
|---|
| 刘庆利: "基于AOS的空间通信系统跨层资源优化技术研究", 《中国博士学位论文全文数据库》 * |
| 张晨华 等: "《国防工业出版社》", 30 November 2016 * |
| 蒙梁 等: "基于标签交换的AOS帧自建链设计", 《广西通信技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112584432A (en) * | 2020-12-15 | 2021-03-30 | 天地信息网络研究院(安徽)有限公司 | Multi-user high-speed satellite laser communication supporting method and air interface protocol |
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