CN104184815A - Topology network - Google Patents
Topology network Download PDFInfo
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- CN104184815A CN104184815A CN201410430534.8A CN201410430534A CN104184815A CN 104184815 A CN104184815 A CN 104184815A CN 201410430534 A CN201410430534 A CN 201410430534A CN 104184815 A CN104184815 A CN 104184815A
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Abstract
The invention provides a topology network and belongs to the technical field of network topology. The topology network comprises at least one subnet. Each subnet comprises a subnet main node. Each subnet comprises at least one domain, wherein each domain comprises a domain main node. The subnets are connected through the subnet main nodes, and Flex Ray-based bus communication is adopted. Communication is conducted between each domain and the subnet main node of the corresponding subnet through the corresponding domain main node. The topology network is especially suitable for vehicles to avoid the heavy signal routing burden of a gateway. The active star type connection mode is adopted to enable the subnet main nodes to be able to detect the network transmission condition actively and intelligently, and furthermore, communication between different domains in the same subnet can be conducted without depending on the backbone network, so that the instantaneity of communication is guaranteed. The double-channel transmission method enables the backbone network to guarantee information transmission under the condition that any network fails, and then fault operability is achieved.
Description
Technical field
The invention belongs to network topology technical field, relate to a kind of topological network.
Background technology
Electric framework based on territory (domain) is the automotive field development trend in next stage.Communication between territory and territory (domain-to-domain) can realize by gateway (gateway), but can increase like this reliability requirement of gateway, and makes gateway become more complicated to the car load wire harness in each territory.Another solution is to realize by backbone network (backbone network), the information exchange in a territory is crossed to backbone network and be transferred in another one territory.
In prior art, backbone network has the technology that adopts the high-speed CAN bus based on 500kbps traffic rate, but because backbone network is associated in while communicating by letter between each subnet, the traffic is large, load factor is high, the communication bandwidth of CAN bus can not meet growing communication requirement, particularly the demand of the real-time such as safety and dynamic Control, reliability and so on.
Summary of the invention
The object of the present invention is to provide the network topology structure that a kind of cost is lower and reliability is higher.
In order to achieve the above object, solution of the present invention is:
A topological network, comprises at least one subnet, and described in each, subnet comprises sub-host's node; Described subnet comprises at least one territory, and described in each, territory comprises a territory host node; Between described each subnet, by described subnet host node, connect, adopt based on Flex Ray bus communication; Communicate by letter with the subnet host node of place subnet by its territory host node in described each territory.
Between described subnet host node, by binary channels, connect.
Described territory host node is connected with the subnet host node of its place subnet, belongs between the territory of same described subnet by the subnet host node of described territory host node and place subnet separately and communicates by letter.
Between described territory host node and described major network host node, pass through Flex Ray bus communication.
In described territory, at least comprise a module, described in each, module includes a territory from node; Described in each in same described territory, between module, by described territory separately, from node, connect, described territory is also connected with Yu Nei territory, its place host node from node.
Between module in same described territory, pass through CAN bus communication.
The degree that the function realization of described territory host node depends on place intra-area communication information is greater than first threshold; First threshold is set point.
The degree that the function realization of described subnet host node depends on the communication information in the subnet of place is greater than Second Threshold; Described Second Threshold is set point.
Described topological network comprises that demonstration is communicated with subnet, power chassis controls subnet and subnet is controlled in vehicle body amusement.
Described demonstration connects subnet and comprises information display field and vehicle connected domain; Described power chassis is controlled subnet and is comprised chassis control territory and dynamic Control territory; Described vehicle body amusement is controlled subnet and is comprised Body Control territory and Infotainment territory.
Owing to adopting such scheme, the invention has the beneficial effects as follows: the present invention has adopted the backbone-network-mapping of cascade, make car load no longer adopt the communication mode of central gateway, thereby avoided the heavy signal route burden of gateway; Simultaneously according to the position reasonable Arrangement car load wire harness in each territory; Adopted the star-like connected mode of active, make the subnet host node can be initiatively and the Sampling network of intelligence transmission situation, and adopt outstanding fault-tolerance approach to communicate, thereby and the communication between each territory of same subnet can be by backbone network, transmit the real-time that has guaranteed communication; Twin-channel transmission means still can guarantee information be transmitted backbone network in the situation that any network breaks down, thereby realizes fault operability.
Accompanying drawing explanation
Fig. 1 is the initiatively network architecture diagram of star-like backbone network of the cascade bi-pass road of the embodiment of the present invention based on FlexRay bus.
Embodiment
Below in conjunction with accompanying drawing illustrated embodiment, the present invention is further illustrated.
The present invention proposes a kind of topological network, this topological network is particularly useful on vehicle, is specially initiatively star-like backbone network of a kind of cascade bi-pass road based on FlexRay bus, and Fig. 1 is its network architecture diagram.This backbone network adopts cascade network topology, and car load network is divided into a plurality of subnets (sub-network), and several territories are contained in each subnet the inside; Each subnet comprises sub-host's node, and by subnet host node, connects between each subnet; Each territory includes a territory host node, connect, and each territory host node is all connected with the subnet host node of this place, territory subnet between each territory by territory host node.Subnet host node adopts initiatively star-like connection and implementation to the territory host node in each territory, and initiatively the basic function of star-like connected mode flows to all other network branches for forwarding the data that receive.Subnet host node carries out with the Double channel scheme of employing based on Flex Ray bus of communicating by letter between subnet host node simultaneously.Between domain node, pass through CAN bus communication cheaply.
In the present embodiment, should comprise several functions control subnets by the cascade bi-pass road star-like backbone network of active based on FlexRay bus, the power chassis as shown in Fig. 1 dashed rectangle is controlled subnet, and subnet is controlled in vehicle body amusement, shows connection control subnet; Each subnet can be further subdivided into function control domain, the chassis control territory as shown in dotted ellipse frame in Fig. 1, dynamic Control territory, Body Control territory, Infotainment territory, information display field, vehicle connected domain.In each function control domain, further comprise at least one module, each module includes a territory from node.As information display field comprises new line display module; Vehicle connected domain comprises OBD interface module; Chassis control territory comprises electronic stability control module, steering wheel angle sensor module, electric power steering module, four-wheel drive module, rear radar camera module, front radar camera module etc.; Dynamic Control territory comprises engine control module, transmission control module, electronic gear shifter module, air bag module etc.; Body Control territory comprises that a key starts module, air-conditioning control module, tire pressure monitoring module, vehicle window control module, power management module etc.; Infotainment territory comprises television module, audio-frequency module, 3G communication module etc.All controller nodes in this network are divided three classes, and are respectively active star-like nodes (being subnet host node), territory host node, and territory is from node.Territory all connects the territory host node in this territory from node, thus connecting by the host node in this territory from node and communicating by letter in same territory.
There is between the functional domain node being closely connected communication comparatively frequent, be divided into a specific territory, for example chassis control territory, dynamic Control territory, Body Control territory, Infotainment territory, information display field, vehicle connected domain.Called function is closely connected and refers to that the function of a territory host node realizes the communication information that mainly depends on its functional domain inside, place, only have small part to depend on the communication information in other territory or do not rely on the communication information in other territory, be that the function of territory host node realizes the degree depend on the communication information in its place functional domain and is greater than certain threshold value, this threshold value is set point.For example, engine control module in dynamic Control territory, gearbox controller module, between electronic gear shifter module, function is closely connected, the gear information of electronic gear shifter inputs to gearbox controller module and realizes gearshift control function, and the signals such as the engine speed of engine control module output, the control of lifting moment of torsion, warm up cycle input to speed changer realization gearshift and control function; Information display field is only realized gear Presentation Function, with other territories such as steering wheel angle sensor, electric powered steering control module, air-conditioning control modules, does not have the communication information mutual.
Territory host node is not only managed the communication behavior of all nodes in this territory, functions such as network management, schema management, and be the interface that this territory and other territories, external equipment communicate, for example the diagnosis of other domain node is undertaken by territory host node.
Equally, for the territories that have tight interconnectivity, be divided into a function subnet, for example chassis control territory and dynamic Control territory have contact closely in automobile, such as electronic stability control module, except relying on steering wheel angle sensor, engine control module is also closely connected, and a territory is when can not hold all domain nodes, can be divided into power chassis and be controlled subnet, each subnet can arrange sub-host's node, and this subnet host node is the active star node (activestar) of backbone network.
Between territory host node and star-like host node, be connected by twin-channel main line between star-like host node and star-like host node, star-like host node is only by a primary transmission under normal circumstances, in the situation that this main line breaks down, enable an other main line, thereby realized fault operability.
The present invention adopts and combines binary channels cascade, the star-like FlexRay bus backbone network of active, and functional domain inside has adopted CAN bus network cheaply in addition.The introducing of binary channels cascade redundant channel increased fault-tolerant grade; Initiatively star-like introducing not only can be delivered to all other functional domains by the data flow in a functional domain, and can increase FlexRay bus wire harness length; The introducing with FlexRay (be CAN bus 20 times) the bus backbone network of 10Mbps traffic rate has met the demand of transmission of the big data quantity of real-time, reliability; Domain node in individual feature territory can carry out direct communication by CAN bus just can meet local communication demand, needn't adopt FlexRay network service.
Topological network of the present invention has adopted the backbone-network-mapping of cascade, makes car load no longer adopt the communication mode of central gateway, thereby has avoided the heavy signal route burden of gateway; Simultaneously according to the position reasonable Arrangement car load wire harness in each territory; Adopted the star-like connected mode of active, make the subnet host node can be initiatively and the Sampling network of intelligence transmission situation, and adopt outstanding fault-tolerance approach to communicate, thereby and the communication between each territory of same subnet can be by backbone network, transmit the real-time that has guaranteed communication; Twin-channel transmission means still can guarantee information be transmitted backbone network in the situation that any network breaks down, thereby realizes fault operability.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.Person skilled in the art obviously can easily make various modifications to these embodiment, and General Principle described herein is applied in other embodiment and needn't passes through performing creative labour.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not departing from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (10)
1. a topological network, is characterized in that: comprise at least one subnet, described in each, subnet comprises sub-host's node; Described subnet comprises at least one territory, and described in each, territory comprises a territory host node;
Between described each subnet, by described subnet host node, connect, adopt based on Flex Ray bus communication; Communicate by letter with the subnet host node of place subnet by its territory host node in described each territory.
2. topological network according to claim 1, is characterized in that: between described subnet host node, by binary channels, connect.
3. topological network according to claim 1, is characterized in that: described territory host node is connected with the subnet host node of its place subnet, belongs between the territory of same described subnet by the subnet host node of described territory host node and place subnet separately and communicates by letter.
4. topological network according to claim 1, is characterized in that: between described territory host node and described major network host node, pass through Flex Ray bus communication.
5. topological network according to claim 1, is characterized in that: in described territory, at least comprise a module, described in each, module includes a territory from node; Described in each of same described territory, between module, by described territory separately, from node, connect, described territory is also connected with Yu Nei territory, its place host node from node.
6. topological network according to claim 5, is characterized in that: between the module in same described territory, pass through CAN bus communication.
7. topological network according to claim 1, is characterized in that: the degree that the function realization of described territory host node depends on place intra-area communication information is greater than first threshold; First threshold is set point.
8. topological network according to claim 1, is characterized in that: the degree that the function realization of described subnet host node depends on the communication information in the subnet of place is greater than Second Threshold; Described Second Threshold is set point.
9. topological network according to claim 1, is characterized in that: described topological network is vehicle-mounted topological network, comprises and shows that being communicated with subnet, power chassis control subnet and vehicle body amusement controls subnet.
10. topological network according to claim 9, is characterized in that: described demonstration connects subnet and comprises information display field and vehicle connected domain; Described power chassis is controlled subnet and is comprised chassis control territory and dynamic Control territory; Described vehicle body amusement is controlled subnet and is comprised Body Control territory and Infotainment territory.
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| CN107197007A (en) * | 2017-05-07 | 2017-09-22 | 北京航空航天大学 | Electric automobile based on vehicle-mounted Ethernet point domain formula mesh communication network framework and communication means |
| CN107678310A (en) * | 2017-09-20 | 2018-02-09 | 北京长城华冠汽车科技股份有限公司 | vehicle electrical architecture and automobile |
| CN109412695A (en) * | 2018-12-28 | 2019-03-01 | 中国船舶重工集团公司第七〇九研究所 | A kind of optical fiber CAN 2.0B bus route system based on star topology |
| CN110290980A (en) * | 2017-02-28 | 2019-09-27 | 奥迪股份公司 | Motor vehicle with the data network for being divided into multiple separate domain and the method for operation data network |
| CN110562171A (en) * | 2019-10-11 | 2019-12-13 | 北京新能源汽车技术创新中心有限公司 | Automobile electric control system and automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110290980A (en) * | 2017-02-28 | 2019-09-27 | 奥迪股份公司 | Motor vehicle with the data network for being divided into multiple separate domain and the method for operation data network |
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| CN109412695B (en) * | 2018-12-28 | 2022-06-10 | 中国船舶重工集团公司第七一九研究所 | Optical fiber CAN2.0B bus routing system based on star topology structure |
| CN110562171A (en) * | 2019-10-11 | 2019-12-13 | 北京新能源汽车技术创新中心有限公司 | Automobile electric control system and automobile |
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