CN103024860B - Satellite channel route distribution method - Google Patents
Satellite channel route distribution method Download PDFInfo
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- CN103024860B CN103024860B CN201210533009.XA CN201210533009A CN103024860B CN 103024860 B CN103024860 B CN 103024860B CN 201210533009 A CN201210533009 A CN 201210533009A CN 103024860 B CN103024860 B CN 103024860B
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Abstract
The invention provides a kind of satellite channel route distribution method, after payload equipment access Spacewire bus network, passing of satelline bus control unit carries out poll to payload equipment, reads the electronic data sheet of Loading End, obtains the message transmission rate of load; Afterwards, any two-way in the multichannel payload of acquisition or the transmission data rate sum of multichannel and the transmission rate of destination address A or destination address B compare by bus control unit, following load transmission rate in Spacewire bus network and all must be less than the principle of the transmission rate of router destination address A or destination address B, is load distribution routed path according to comparative result; After route assignment completes, the transmission path of payload by arranging, by Packet Generation to route.Present invention achieves the function of satellite based on Spacewire bus plug and play, meet the channel design demand of Spacewire bus plug-and-play feature.
Description
Technical field
The present invention relates to space industry, particularly, relate to a kind of data transmission channel route distribution method based on Spacewire bus plug-and-play feature.
Background technology
SpaceWire bus is that European Space Agency is based on two commercial standard (CS) IEEE1355-1995 and IEEE1596.3(LVDS), by the improvement to aspects such as IEEE1355 reliability, power consumptions, aerospace applications can be met better and a kind of bus standard being specifically designed to space high speed data transfer proposed.The structure that it adopts point-to-point to connect, can use multiple bus in same network, network topology has the very high degree of freedom simultaneously.And each equipment room has a special connection, therefore, even if each data transmission bauds connected of equipment room is not high, the method still by increasing bus number improves the data transmission bauds of whole network exponentially, and single line speed reaches as high as 400Mbps.
The serial full duplex network communication technology of a kind of high speed that SpaceWire bus designs as aiming at AEROSPACE APPLICATION, scalable, low-power consumption, has autgmentability flexibly, the features such as efficient data transmission credibility.Adopt SpaceWire bussing technique can not only support the expansion of payload, meet the demand of loading device plug and play, simultaneously also made satellite platform possess transfer of data and networking recombination function flexibly, for platform interface standardization is laid a good foundation.But current miniature channel route assignment designs the function of inapplicable SpaceWire bus plug and play, the application of SpaceWire bus plug-and-play feature is restricted.Therefore, the design of the present invention to satellite channel route assignment makes improvements with the demand met based on Spacewire bus plug-and-play feature.
Summary of the invention
For defect of the prior art, the object of this invention is to provide a kind of satellite channel route distribution method, the present invention can carry out autonomous distribution and control to the channel route of payload equipment, can realize the function of satellite based on Spacewire bus plug and play.
According to an aspect of the present invention, a kind of satellite channel route distribution method is provided, comprises the following steps:
Step one, after payload equipment access Spacewire bus network, passing of satelline bus control unit carries out poll to payload equipment, reads the electronic data sheet of Loading End, obtains the message transmission rate of load;
Step 2, any two-way in the multichannel payload of acquisition or the transmission data rate sum of multichannel and the transmission rate of destination address A or destination address B compare by bus control unit, be load distribution routed path, be specially according to comparative result:
If the transmission data rate sum of any two-way or multichannel is less than the transmission rate of destination address A or destination address B in multichannel, any two-way or multichannel Loading End Spacewire node-routing path values can be set to same output destination address, i.e. destination address A or destination address B by bus control unit;
If the transmission data rate sum of any two-way or multichannel is greater than the transmission rate of destination address A or destination address B in multichannel, bus control unit independently can distribute route, wherein one or more Loading End Spacewire node-routing path values is set to destination address A, and remaining all Loading End Spacewire node-routing path values are set to destination address B, ensure that the data rate sum of the loading device of address A for the purpose of routed path value is less than the transmission rate of destination address A, for the purpose of routed path value, the data rate sum of the loading device of address B is less than the transmission rate of destination address B simultaneously,
Step 3, after route assignment completes, the transmission path of payload by arranging, by Packet Generation to route.
Preferably, the method also comprises step 4: when having new payload equipment access or payload equipment to shift out Spacewire bus network, repeats step one to step 3, redistributes the routed path value of payload.
Packet header delet method is adopted to carry out Route Selection in step 3.
Compared with prior art, beneficial effect of the present invention is: the present invention is when having new payload equipment access or payload equipment to shift out Spacewire bus network, by control bus, poll is carried out to equipment by satellite bus controller, read the data-rate information in the electronic data sheet of each payload, and any two-way in the multichannel payload of acquisition or the transmission data rate sum of multichannel and the transmission rate of destination address A or destination address B are compared, be load distribution routed path according to comparative result, under ensureing that the message transmission rate sum of each road payload is less than the prerequisite of the transmission rate of SpaceWire router destination address A or destination address B, autonomous distribution and control are carried out to the channel route of payload equipment, achieve the function of satellite based on Spacewire bus plug and play, meet the channel design demand of Spacewire bus plug-and-play feature.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is the payload of application the inventive method and counts the annexation principle schematic passed between integrated treatment module;
Fig. 2 is that routing principle schematic diagram is deleted in the packet header of the embodiment of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
Spacewire(SpW) network topology structure that is made up of Spacewire network node and multi-layer switches of bus network, passing of satelline Spacewire bus realizes collection, the multiple connection of load high-speed data.SpW network route test mainly completes the Path selection in load data bag transmitting procedure, takes suitable channel route assignment strategy to forward route to the acquiescence changing load data bag.Payload equipment and satellite data transmission integrated treatment intermodule annexation are as Fig. 1.
The route transmission rate of SpaceWire bus network requires: the peak rate that payload equipment sends must be less than SpaceWire route transmission rate.As shown in Figure 1, the message transmission rate of payload 1 ~ payload N or multichannel load transmission rate sum all must be less than the transmission rate of SpaceWire router destination address A or destination address B.
Based on the route transmission rate requirement of above SpaceWire bus network, and the channel design demand of Spacewire bus plug-and-play feature, the invention provides a kind of satellite channel route distribution method, the method is after payload equipment access Spacewire bus network, passing of satelline control bus carries out poll to payload equipment, reads the electronic data sheet of Loading End.Bus control unit injects routed path data according to reading the load data transmission rate obtained to Loading End, to configure the routed path value (default value) in the register of respective loads end SpW node, realizes the route assignment of SpW node.Specifically comprise the following steps:
Step one, after payload equipment access Spacewire bus network, passing of satelline bus control unit carries out poll to payload equipment, reads the electronic data sheet of Loading End, obtains the message transmission rate of load;
Step 2, any two-way in the multichannel payload of acquisition or the transmission data rate sum of multichannel and the transmission rate of destination address A or destination address B compare by bus control unit, be load distribution routed path, be specially according to comparative result:
If the transmission data rate sum of any two-way or multichannel is less than the transmission rate of destination address A or destination address B in multichannel, any two-way or multichannel Loading End Spacewire node-routing path values can be set to same output destination address, i.e. destination address A or destination address B by bus control unit.
If the transmission data rate sum of any two-way or multichannel is greater than the transmission rate of destination address A or destination address B in multichannel, bus control unit independently can distribute route, wherein one or more Loading End Spacewire node-routing path values is set to destination address A, and remaining all Loading End Spacewire node-routing path values are set to destination address B, ensure that the data rate sum of the loading device of address A for the purpose of routed path value is less than the transmission rate of destination address A, for the purpose of routed path value, the data rate sum of the loading device of address B is less than the transmission rate of destination address B simultaneously.
SpaceWire bus data frame format is as shown in the table.
Table 1SpaceWire bus data frame format
| Routed port address (MS) | Routed port address (LS) | |
| Destination logical address | Protocol-identifier 0x88 | Load ID |
| Load bag counts | Load bag counts | Load bag counts |
| Head CRC | Data | Data |
| ...... | ...... | ...... |
| ...... | ...... | ...... |
| Data | Data CRC |
Note: in table, each lattice length is 8bit length, dark parts length is 1006 bytes;
Particularly, the bus control unit described in step 2, to the action of Loading End route assignment, realizes by changing route port address field in upper table.Default route address, initial condition each load address is A, and when the transmission rate of each loading demands is greater than the supported maximum rate of A port, in change, in table, the data of route port address field realize the Route Selection of port B.
Step 3, after route assignment completes, the transmission path of payload by arranging, by Packet Generation to route.
In this step, after route assignment completes, the transmission path of payload by pre-setting, by Packet Generation to route.The method that SpW network adopts packet header to delete carries out Route Selection, completes this part function by SpW protocol chip.As shown in Figure 2, when a SPW protocol data bag is received in a network, the first character detecting bag is saved to determine these bag data from which port export, and then deletes the first character joint of this bag.After passing through this network node, the first aim port address of the packet of transmission is deleted.
Step 4: when having new payload equipment access or payload equipment to shift out Spacewire bus network, repeats step one to step 3, redistributes the routed path value of payload.
When having new payload equipment access or payload equipment to shift out Spacewire bus network, bus control unit can carry out poll by control bus to equipment, read the data-rate information in electronic data sheet, and according to above-mentioned route assignment strategy, configuration is re-started to the routed path value in the register of Loading End SpW node, realizes the autonomous distribution of route.
From the above mentioned, the present invention is by designing the channel route assignment of satellite based on Spacewire bus plug-and-play feature, achieve the autonomous distribution to Loading End channel route and control, achieve the function of satellite based on Spacewire bus plug and play, meet the channel design demand of Spacewire bus plug-and-play feature.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (3)
1. a satellite channel route distribution method, is characterized in that, comprises the following steps:
Step one, after payload equipment access Spacewire bus network, passing of satelline bus control unit carries out poll to payload equipment, reads the electronic data sheet of payload equipment, obtains the message transmission rate of payload equipment;
Step 2, any two-way in the multichannel payload equipment of acquisition or the message transmission rate sum of multichannel and the transmission rate of destination address A or destination address B compare by bus control unit, according to comparative result be payload equipment distribute routed path, be specially:
If the message transmission rate sum of any two-way or multichannel is less than the transmission rate of destination address A or destination address B in multichannel, any two-way or multichannel payload equipment Spacewire node-routing path values can be set to same output destination address, i.e. destination address A or destination address B by bus control unit;
If the message transmission rate sum of any two-way or multichannel is greater than the transmission rate of destination address A or destination address B in multichannel, bus control unit independently can distribute route, wherein one or more payload equipment Spacewire node-routing path values is set to destination address A, and remaining all payload equipment Spacewire node-routing path values are set to destination address B, ensure that the message transmission rate sum of the payload equipment of address A for the purpose of routed path value is less than the transmission rate of destination address A, for the purpose of routed path value, the message transmission rate sum of the payload equipment of address B is less than the transmission rate of destination address B simultaneously,
Step 3, after route assignment completes, the transmission path of payload equipment by arranging, by Packet Generation to route.
2. satellite channel route distribution method according to claim 1, it is characterized in that, also comprise step 4: when having new payload equipment access or payload equipment to shift out Spacewire bus network, repeat step one to step 3, the routed path value of payload equipment is redistributed.
3. satellite channel route distribution method according to claim 1, is characterized in that, adopts packet header delet method to carry out Route Selection in step 3.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103347071B (en) * | 2013-06-28 | 2017-02-08 | 深圳市金立通信设备有限公司 | MIPI data transmission control method and electronic device |
| CN103457815B (en) * | 2013-08-22 | 2016-03-30 | 北京航空航天大学 | A kind of construction method being applicable to the moment dispatch list of SpaceWire network |
| CN103501238A (en) * | 2013-09-09 | 2014-01-08 | 中国航天科技集团公司第五研究院第五一三研究所 | Plug and play method based on SpaceWire |
| CN105187227B (en) * | 2015-06-12 | 2018-08-17 | 北京航空航天大学 | A kind of device using RMAP protocol realization CAN bus equipment plug and play |
| CN105072040B (en) * | 2015-07-31 | 2018-08-03 | 上海卫星工程研究所 | Efficient satellite SpaceWire plug and play network topological construction methods |
| CN112468209B (en) * | 2020-10-29 | 2022-06-03 | 西安空间无线电技术研究所 | On-orbit high-speed injection system and method based on SpaceWire bus |
| CN113645676B (en) * | 2021-08-13 | 2023-12-15 | 中国人民解放军63620部队 | Service data sending method and device, computer equipment and storage medium |
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