CN117376374A - Vehicle-mounted Ethernet architecture and vehicle - Google Patents

Abstract

The utility model discloses a on-vehicle ethernet framework and vehicle belongs to vehicle technical field, and this on-vehicle ethernet framework includes: a first type of ethernet node, a second type of ethernet node, and a third type of ethernet node; the first type of ethernet node comprises a first TSN shaper combination comprising at least one TSN shaper determined based on data stream transmission characteristic parameters of the first type of ethernet node; the second type of ethernet node comprises a second TSN shaper combination comprising at least one TSN shaper determined based on data stream reception characteristic parameters of the second type of ethernet node; the third type of ethernet node comprises a third TSN shaper combination comprising at least one TSN shaper determined in accordance with a data stream forwarding characteristic parameter of said third type of ethernet node. The embodiment of the disclosure can improve the flexibility of vehicle-mounted data transmission and reduce data delay.

Description

Vehicle-mounted Ethernet architecture and vehicle

Technical Field

The disclosure belongs to the technical field of vehicles, and particularly relates to a vehicle-mounted Ethernet architecture and a vehicle.

Background

With the continuous development of ethernet technology, an increasing variety of vehicle-mounted data (e.g., control data, multimedia data, etc.) can be transmitted through ethernet. In the prior art, each ethernet node in the vehicle-mounted ethernet architecture often performs transmission of various vehicle-mounted data directly based on a priority mode, so as to ensure that the vehicle-mounted data with high priority is transmitted preferentially. However, such a vehicle-mounted data transmission manner is poor in flexibility, and it is difficult to satisfy transmission requirements of different types of vehicle-mounted data.

Disclosure of Invention

The present disclosure provides a vehicle-mounted ethernet architecture and a vehicle.

According to a first aspect of the present disclosure, there is provided an on-board ethernet architecture comprising: a first type of ethernet node, a second type of ethernet node, and a third type of ethernet node, the first type of ethernet node being configured to transmit an ethernet data stream, the second type of ethernet node being configured to receive the ethernet data stream, the third type of ethernet node being configured to forward the ethernet data stream;

wherein the first type of ethernet node comprises a first time sensitive network (Time Sensitive Network, TSN) shaper combination comprising at least one TSN shaper determined from data stream transmission characteristic parameters of the first type of ethernet node;

The second type of ethernet node comprises a second TSN shaper combination comprising at least one TSN shaper determined from data stream reception characteristic parameters of the second type of ethernet node;

the third type of ethernet node comprises a third TSN shaper combination comprising at least one TSN shaper determined in accordance with data stream forwarding characteristic parameters of the third type of ethernet node.

According to a second aspect of the present disclosure, a vehicle is provided, comprising the above-described on-board ethernet architecture.

According to the technology disclosed by the invention, the TSN shaper combinations corresponding to the data stream transmission characteristics of the Ethernet nodes of different types in the vehicle-mounted Ethernet architecture are respectively configured, so that the Ethernet nodes of different types can transmit vehicle-mounted data based on the TSN shaper combinations corresponding to the Ethernet nodes of different types, the flexibility and pertinence of vehicle-mounted data transmission can be improved, the transmission requirements of the vehicle-mounted data of different types can be met more easily, and the redundant design of the TSN shapers of the Ethernet nodes can be reduced.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following specification.

Drawings

The drawings are for a better understanding of the present solution and are not to be construed as limiting the present disclosure. Wherein:

FIG. 1 is one of the schematic diagrams of a vehicle-mounted Ethernet architecture provided by embodiments of the present disclosure;

fig. 2 is a flow chart of a TSN shaper combination for determining a first type of ethernet node provided by an embodiment of the present disclosure;

fig. 3 is a flow chart of a TSN shaper combination for determining a second type of ethernet node provided by an embodiment of the present disclosure;

fig. 4 is a flow chart of a TSN shaper combination for determining a third type of ethernet node provided by an embodiment of the present disclosure;

fig. 5 is a second schematic diagram of a vehicle-mounted ethernet architecture according to an embodiment of the present disclosure.

Detailed Description

Exemplary embodiments of the present disclosure are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present disclosure to facilitate understanding, and should be considered as merely exemplary. Accordingly, one of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

As shown in fig. 1, an embodiment of the present disclosure provides a vehicle-mounted ethernet architecture 100 including: a first type of ethernet node 10, a second type of ethernet node 20 and a third type of ethernet node 30, the first type of ethernet node 10 being for transmitting ethernet data streams, the second type of ethernet node 20 being for receiving ethernet data streams, the third type of ethernet node 30 being for forwarding ethernet data streams;

wherein the first type of ethernet node 10 comprises a first TSN shaper combination 11, the first TSN shaper combination 11 comprising at least one TSN shaper determined based on data stream transmission characteristic parameters of the first type of ethernet node 10;

the second type of ethernet node 20 comprises a second TSN shaper combination 21, the second TSN shaper combination 21 comprising at least one TSN shaper determined in accordance with data stream reception characteristic parameters of the second type of ethernet node 20;

the third type of ethernet node 30 comprises a third TSN shaper combination 31, which third TSN shaper combination 31 comprises at least one TSN shaper determined in accordance with data stream forwarding characteristic parameters of the third type of ethernet node 30.

The first type Ethernet node 10 (Ethernet Talker), the second type Ethernet node 20 (Ethernet Listener), and the third type Ethernet node 30 (Ethernet Bridge) may be connected by Ethernet. The first type of ethernet node 10 described above may comprise any ethernet node in a vehicle ethernet architecture that supports transmitting ethernet data streams, for example, a sensor, an actuator, a zone controller, a central controller, etc. in a vehicle ethernet architecture. The second type of ethernet node 20 described above may comprise any ethernet node in a vehicle ethernet architecture that supports receiving ethernet data streams, such as an actuator, a zone controller, or a central controller in a vehicle ethernet architecture, etc. The third type of ethernet node 30 described above may comprise any ethernet node in a vehicle ethernet architecture that supports forwarding ethernet data streams, e.g., a switch in a vehicle ethernet architecture.

It will be appreciated that for an ethernet node in the in-vehicle ethernet architecture that supports both sending and receiving ethernet data streams, then both the first type of ethernet node 10 and the second type of ethernet node 20 are included.

The TSN is a set of ethernet protocol specifications formulated by the IEEE802.1 working group, and provides deterministic data transmission capability, for example, limited delay, low packet loss rate, and clock synchronization, through mechanisms such as clock synchronization, data scheduling, network configuration, and the like. The above TSN shaper may be understood as a shaper based on the TSN protocol specification and may include, but is not limited to, a strict priority shaper, a time aware shaper, a frame preemption shaper, a credit based shaper, an asynchronous shaper, etc.

The Strict Priority Shaper (SP) may be a shaper based on the specification IEEE802.1P, and the Strict Priority shaper may enable a data stream with a high Priority to be preferentially transmitted.

The Time-aware Shaper (TAS) may be a Shaper based on the specification ieee802.1qbv, and the Time-aware Shaper is used on the basis of clock synchronization, so that on one hand, the Time-sensitive control flow is not interfered by other data flows, and on the other hand, the transmission of the data flows can be controlled by a Time trigger mechanism.

The Frame Preemption shaper (Frame Preemption) may be a shaper based on specifications IEEE802.1 Qbu and IEEE802.3br, by which Preemption of the shaper may allow interruption of the ethernet data being transmitted, preemption of bandwidth, preferential transmission of critical data, and resumption of the interrupted transmission of ethernet data after completion of the critical data transmission.

The Credit-based Shaper (CBS) may be a Shaper based on the specification ieee802.1qav, through which a certain bandwidth may be allocated to a specific traffic Class, and the specific traffic may be scheduled based on credits, so as to disperse transmission of a single Class (Per-Class) data stream, ensure bounded network delay of the single Class data stream, and also ensure transmission possibility of a low priority traffic.

The asynchronous shaper (Aynchronous Traffic Shaper, ATS) may be a shaper based on the specification ieee802.1qcr, through which the transmission of a single data stream (Per-flow) may be dispersed, thereby enabling smoother transmission of data after each hop, ensuring delay and jitter of the single data stream.

It should be noted that, the specific shaping principles of the strict priority shaper, the time aware shaper, the frame preemption shaper, the credit-based shaper and the asynchronous shaper may be referred to the corresponding specifications, which are not limited in this embodiment.

Illustratively, the data stream transmission characteristic parameter may include a characteristic parameter of an ethernet data stream transmittable by the first type of ethernet node 10, or include a characteristic parameter of an ethernet data stream transmittable by the first type of ethernet node 10, a rate of a transmission port of the first type of ethernet node 10, and the like. The ethernet data stream that can be transmitted by the ethernet node 10 of the first type is understood to mean that all ethernet data streams transmitted by the ethernet node 10 of the first type are involved in the use process. The first TSN shaper combination 11 may comprise one or more TSN shapers determined based on the data stream transmission characteristic parameters, e.g. a TSN shaper that may be configured for the first type of ethernet node 10 may be determined based on the characteristic parameters of the ethernet data stream that the first type of ethernet node 10 may transmit. It will be appreciated that the first type of ethernet node 10 described above may comprise a plurality of ethernet nodes, each of which has a TSN shaper combination determined in dependence upon its data stream transmission characteristic parameters.

Illustratively, the above-mentioned data stream reception characteristic parameter may include a characteristic parameter of an ethernet data stream receivable by the second type of ethernet node 20, or may include a characteristic parameter of an ethernet data stream receivable by the second type of ethernet node 20, a rate of a reception port of the second type of ethernet node 20, and the like. The ethernet data stream receivable by the ethernet node 20 of the second type may be understood as all ethernet data streams received by the ethernet node 20 of the second type are involved in the use process. The second TSN shaper combination 21 may comprise one or more TSN shapers determined based on the data stream reception characteristic parameters, e.g. the TSN shapers that the second type of ethernet node 20 needs to configure may be determined based on the characteristic parameters of the ethernet data streams receivable by the second type of ethernet node 20 and the rate of the receiving ports of the second type of ethernet node 20. It will be appreciated that the second type of ethernet node 20 described above may comprise a plurality of ethernet nodes, each of which has a TSN shaper combination determined in accordance with its data stream reception characteristic parameters.

The above-mentioned data stream forwarding characteristic parameters may include characteristic parameters of the ethernet data stream that can be forwarded by the third type of ethernet node 30, or may include characteristic parameters of the ethernet data stream that can be forwarded by the third type of ethernet node 30, a rate of a transmission port of the third type of ethernet node 30, and the like, for example. The ethernet data flow that can be forwarded by the third type of ethernet node 30 may be understood as all ethernet data flows that the third type of ethernet node 30 may be involved in forwarding during use. The third TSN shaper combination 31 may comprise one or more TSN shapers determined based on the data stream transmission characteristic parameters, e.g. a TSN shaper that may be configured for the third type of ethernet node 30 may be determined based on the characteristic parameters of the ethernet data stream that the third type of ethernet node 30 may forward. It will be appreciated that the third type of ethernet node 30 described above may comprise a plurality of ethernet nodes, each of which has a TSN shaper combination determined in accordance with its data stream forwarding characteristic parameters.

According to the vehicle-mounted Ethernet architecture provided by the embodiment, the TSN shaper combinations corresponding to the data stream transmission characteristics of the Ethernet nodes of different types in the vehicle-mounted Ethernet architecture are respectively configured, so that the Ethernet nodes of different types can transmit vehicle-mounted data based on the TSN shaper combinations corresponding to the Ethernet nodes of different types, and therefore the flexibility and pertinence of vehicle-mounted data transmission can be improved, the transmission requirements of the vehicle-mounted data of different types can be met easily, and the redundant design of the TSN shapers of the Ethernet nodes can be reduced.

In some alternative embodiments, the data stream transmission characteristic parameters include characteristic parameters of an ethernet data stream transmittable by the first type of ethernet node and a rate of a transmission port of the first type of ethernet node;

and/or

The data stream receiving characteristic parameters comprise characteristic parameters of the Ethernet data stream receivable by the second type of Ethernet node and the rate of a receiving port of the second type of Ethernet node;

and/or

The data stream forwarding characteristic parameters include characteristic parameters of the ethernet data stream that the third type of ethernet node can forward and a rate of a transmission port of the third type of ethernet node.

By way of example, the characteristic parameters of the ethernet data stream may include, but are not limited to, one or more of a type of ethernet data stream, a number of types of ethernet data streams, a size of ethernet data stream, and the like. The types of the ethernet data streams may include, but are not limited to, some or all of time-sensitive control streams, time-sensitive multimedia streams, network control streams, non-time-sensitive media streams, and Best-Effort (BE) data streams.

According to the embodiment, the TSN shaper combinations of the Ethernet nodes of all types are determined according to the characteristic parameters of the Ethernet data streams which can be transmitted by the Ethernet nodes of all types and the speed of the transmission port, so that the redundancy design of the TSN shapers of the Ethernet nodes of all types can be reduced while the transmission performance of the Ethernet data streams of the Ethernet nodes of all types is improved.

In some alternative embodiments, the first TSN shaper combination includes a strict priority shaper in the case where the ethernet data streams transmittable by the first type of ethernet node include multiple types of ethernet data streams, otherwise the first TSN shaper combination does not include a strict priority shaper;

And/or

The first TSN shaper combination includes a time aware shaper in case the ethernet data stream transmittable by the first type of ethernet node comprises a time sensitive control stream, otherwise the first TSN shaper combination does not include a time aware shaper;

and/or

The first TSN shaper combination comprises a frame preemption shaper when the Ethernet data stream transmittable by the first type of Ethernet node comprises a time sensitive control stream and the rate of the Ethernet node transmission port of the first type is less than or equal to a first preset rate value, otherwise the first TSN shaper combination does not comprise a frame preemption shaper;

and/or

The first TSN shaper set includes a credit-based shaper in case the ethernet data stream transmittable by the first type of ethernet node comprises a non-time sensitive multimedia stream, and otherwise the first TSN shaper set does not include a credit-based shaper.

The first preset speed value may be set reasonably according to actual requirements, for example, the first preset speed value may be 100Mbps.

It is to be appreciated that in some embodiments, the TSN shapers included in the first TSN shaper combination described above may be combined. For example, where the ethernet data streams transmittable by the first type of ethernet node include multiple types of ethernet data streams, the ethernet data streams transmittable by the first type of ethernet node include a time-sensitive control stream and a non-time-sensitive multimedia stream, and the rate of the transmission ports of the first type of ethernet node is less than or equal to a first preset rate value, the first TSN shaper combination includes a strict priority shaper, a time-aware shaper, a frame preemption shaper, and a credit-based shaper; in the case that the ethernet data stream transmittable by the first type of ethernet node includes a time-sensitive control stream and a non-time-sensitive multimedia stream, and the rate of the transmission port of the first type of ethernet node is less than or equal to a first preset rate value, the first TSN shaper combination includes a time-aware shaper, a frame preemption shaper, and a credit-based shaper; the first TSN shaper combination includes a strict priority shaper and a time aware shaper in case the first type of ethernet node transmittable ethernet data streams include multiple types of ethernet data streams, the first type of ethernet node transmittable ethernet data streams include a time sensitive control stream, and a rate of a transmission port of the first type of ethernet node is greater than a first preset rate value.

The following illustrates the selection strategy of the TSN shaper combinations of the first type of ethernet node (i.e. the first TSN shaper combinations described above) in connection with fig. 2, comprising the following steps, as shown in fig. 2:

step 201, judging whether the first type of ethernet node has multiple types of ethernet data streams, if so, executing step 202, and selecting a strict priority shaper to ensure the priority transmission of high-priority data; otherwise, step 203 is directly performed.

Step 203, determining whether the first type of ethernet node has a time-sensitive control flow, if so, executing step 204, and selecting a time-sensitive shaper to ensure data transmission of the critical time-sensitive control flow; otherwise, step 205 is performed directly.

Step 205, judging whether the rate of the transmitting port of the first type of Ethernet node is greater than 100Mbps; if not, executing step 206, selecting a frame preemption shaper, and reducing the waiting delay of the time sensitive control flow; otherwise, step 207 is directly performed.

It should be noted that, under the on-vehicle ethernet architecture including the central controller and the regional controller, a rate higher than 100Mbps may include 1000Mbps and multiple gigabits (Multi-G), where Multi-G > =2.5 Gbps, and at this rate, the effect of using the frame preemption shaper is smaller, for example, the ethernet data of 1522 bytes of a single frame is transmitted for less than 13 microseconds, the latency is very low, and introducing the frame preemption shaper may instead increase the hardware overhead; but for links at 100Mbps and even lower, using a frame preemption shaper can effectively reduce the latency of time sensitive control flows.

Step 207, determining whether the first type of ethernet node has a non-time sensitive multimedia stream, if so, executing step 208, and selecting a credit-based shaper, so that on the premise of guaranteeing the bandwidth requirement of the non-time sensitive multimedia stream, enough transmission opportunities are reserved for a low-priority Best Effort (BE) data stream, thereby reducing the latency of the best effort data stream; otherwise, ending the flow.

In practical applications, after determining the TSN shaper combination of the first type of ethernet node (i.e., the first TSN shaper combination), transmission control may be performed on the ethernet data stream to be transmitted by the first type of ethernet node based on each TSN shaper within the TSN shaper combination of the first type of ethernet node. It should be noted that, in the case where the first TSN shaper set includes a plurality of TSN shapers, the order in which the transmission control is performed on the ethernet data stream to be transmitted by the ethernet node of the first type of TSN shaper of the first TSN shaper set is not limited in this embodiment.

Illustratively, in the case that the first TSN shaper combination includes a strict priority shaper, a time aware shaper, a frame preemption shaper, and a credit based shaper, transmission control may be performed on an ethernet data stream to be transmitted by the first type of ethernet node via the credit based shaper first, so as to leave enough transmission opportunities for the low priority best effort data stream while guaranteeing bandwidth requirements of the non-time sensitive multimedia stream, thereby reducing latency of the best effort data stream; the time perception shaper is used for carrying out transmission control on the Ethernet data stream to be sent by the first type of Ethernet node so as to ensure that the time sensitive control stream is not interfered by other data streams; carrying out transmission control on the Ethernet data stream to be transmitted by the Ethernet node of the first type through a strict priority shaper so as to enable the data stream with high priority to be transmitted preferentially; and then the frame preemption shaper performs transmission control on the Ethernet data stream to be sent by the first type of Ethernet node so as to reduce the waiting delay of the time sensitive control stream.

The embodiment further includes a first TSN shaper set, wherein the first TSN shaper set includes a strict priority shaper when the ethernet data stream transmittable by the first type of ethernet node includes a plurality of types of ethernet data streams, and wherein the first TSN shaper set does not include a strict priority shaper otherwise; the first TSN shaper combination includes a time aware shaper in case the ethernet data stream transmittable by the first type of ethernet node comprises a time sensitive control stream, otherwise the first TSN shaper combination does not include a time aware shaper; the first TSN shaper combination comprises a frame preemption shaper when the Ethernet data stream transmittable by the first type of Ethernet node comprises a time sensitive control stream and the rate of the Ethernet node transmission port of the first type is less than or equal to a first preset rate value, otherwise the first TSN shaper combination does not comprise a frame preemption shaper; in the case that the ethernet data stream that can be sent by the first type of ethernet node includes a non-time-sensitive multimedia stream, the first TSN shaper set includes a credit-based shaper, otherwise, the first TSN shaper set does not include a credit-based shaper, so that not only a bounded low latency of various ethernet data streams to be sent by the first type of ethernet node can be ensured, but also a redundant design of the TSN shaper of the first type of ethernet node can be reduced, thereby reducing the cost.

In some alternative embodiments, the second TSN shaper combination includes a frame preemption shaper in the event that the ethernet data stream receivable by the second type of ethernet node includes a time sensitive control stream and the rate of the second type of ethernet node transmit port is less than or equal to a second preset rate value, otherwise the second TSN shaper combination does not include a frame preemption shaper.

The second preset speed value may be set reasonably according to actual requirements, for example, the first preset speed value may be 100Mbps.

The following illustrates the selection strategy of the TSN shaper combinations of the second type of ethernet node (i.e. the second TSN shaper combinations described above) in connection with fig. 3, comprising the following steps, as shown in fig. 3:

step 301, judging whether the second type of ethernet node receives a time sensitive control stream, if yes, executing step 302, otherwise, ending;

step 302, judging whether the rate of the receiving port of the second type of Ethernet node is greater than 100Mbps; if not, then go to step 303 to select a frame preemption shaper; otherwise, ending the flow.

It should be noted that, in the case that the frame preemption shaper is adopted by the sender of the ethernet data stream, the receiver of the ethernet data stream must support the frame preemption shaper for recovering the broken frame.

In this embodiment, in a case where the ethernet data stream receivable by the second type of ethernet node includes a time-sensitive control stream and the rate of the sending port of the second type of ethernet node is less than or equal to a second preset rate value, the second TSN shaper set includes a frame preemption shaper, and otherwise, the second TSN shaper set does not include a frame preemption shaper, so that the redundancy design of the TSN shaper of the second type of ethernet node can be reduced while ensuring that the second type of ethernet node can recover the interrupted data stream, thereby reducing the cost.

In some alternative embodiments, the third TSN shaper set comprises a strict priority shaper in case the ethernet data stream that the third type of ethernet node can forward comprises a multi-class ethernet data stream, otherwise the third TSN shaper set does not comprise a strict priority shaper;

and/or

In the case that the ethernet data stream that the ethernet node of the third type is capable of forwarding comprises a time-sensitive control stream, the third TSN shaper combination comprises a time-aware shaper, otherwise the third TSN shaper combination does not comprise a time-aware shaper;

And/or

The third TSN shaper combination includes a frame preemption shaper when the ethernet data stream that the third type of ethernet node can forward includes a time sensitive control stream and the rate of the third type of ethernet node transmit port is less than or equal to a third preset rate value, otherwise the third TSN shaper combination does not include a frame preemption shaper;

and/or

In case the ethernet data stream that the third type of ethernet node can forward comprises a multimedia stream, the third TSN shaper combination comprises a credit based shaper, otherwise the third TSN shaper combination does not comprise a credit based shaper.

The third preset speed value may be set reasonably according to actual requirements, for example, the third preset speed value may be 100Mbps. The multimedia streams may include time-sensitive multimedia streams and non-time-sensitive multimedia streams.

It is to be appreciated that in some embodiments, the third TSN shaper combination described above may include a TSN shaper that is combined. For example, in the case where the ethernet data streams that are forwardable by the third type of ethernet node include multiple types of ethernet data streams, the ethernet data streams that are forwardable by the third type of ethernet node include a time-sensitive control stream and a multimedia stream, and the rate of the transmission ports of the third type of ethernet node is less than or equal to a third preset rate value, the third TSN shaper combination includes a strict priority shaper, a time-aware shaper, a frame preemption shaper, and a credit-based shaper; in the case that the ethernet data stream that can be forwarded by the third type of ethernet node includes a time sensitive control stream and a multimedia stream, and the rate of the sending port of the third type of ethernet node is less than or equal to a third preset rate value, the third TSN shaper combination includes a time aware shaper, a frame preemption shaper, and a credit-based shaper; in the case that the ethernet data stream that can be forwarded by the third type of ethernet node includes multiple types of ethernet data streams, the ethernet data stream that can be forwarded by the third type of ethernet node includes a time sensitive control stream, and the rate of the sending port of the third type of ethernet node is greater than a third preset rate value, the third TSN shaper combination includes a strict priority shaper and a time aware shaper.

In practical applications, after determining the TSN shaper combination of the third type of ethernet node (i.e., the third TSN shaper combination), transmission control may be performed on the ethernet data stream to be forwarded by the third type of ethernet node based on each TSN shaper within the TSN shaper combination of the third type of ethernet node. It should be noted that, in the case where the third TSN shaper set includes a plurality of TSN shapers, the order in which the transmission control is performed on the ethernet data stream to be forwarded by the ethernet node of the third type of the TSN shaper set of the third TSN shaper set is not limited in this embodiment.

Illustratively, in the case that the third TSN shaper combination includes a strict priority shaper, a time aware shaper, a frame preemption shaper, and a credit-based shaper, transmission control may be performed on an ethernet data stream to be forwarded by the third type of ethernet node via the credit-based shaper first, so as to leave enough transmission opportunities for the network control stream and the low priority best effort data stream on the premise of guaranteeing bandwidth requirements of the multimedia stream, thereby reducing latency of the network control stream and the best effort data stream; the time perception shaper is used for carrying out transmission control on the Ethernet data stream to be forwarded by the Ethernet node of the third type so as to ensure that the time sensitive control stream is not interfered by other data streams; carrying out transmission control on the Ethernet data stream to be forwarded by the third type of Ethernet node through a strict priority shaper so as to enable the data stream with high priority to be sent preferentially; and then the frame preemption shaper performs transmission control on the Ethernet data stream to be forwarded by the Ethernet node of the third type so as to reduce the waiting delay of the time sensitive control stream.

The embodiment further comprises a third TSN shaper set comprising a strict priority shaper in case the ethernet data stream that the third type of ethernet node can forward comprises a plurality of types of ethernet data streams, otherwise the third TSN shaper set does not comprise a strict priority shaper; in the case that the ethernet data stream that the ethernet node of the third type is capable of forwarding comprises a time-sensitive control stream, the third TSN shaper combination comprises a time-aware shaper, otherwise the third TSN shaper combination does not comprise a time-aware shaper; the third TSN shaper combination includes a frame preemption shaper when the ethernet data stream that the third type of ethernet node can forward includes a time sensitive control stream and the rate of the third type of ethernet node transmit port is less than or equal to a third preset rate value, otherwise the third TSN shaper combination does not include a frame preemption shaper; in case the ethernet data stream that the third type of ethernet node can forward comprises a multimedia stream, the third TSN shaper combination comprises a credit based shaper, otherwise the third TSN shaper combination does not comprise a credit based shaper. Therefore, the bounded low time delay of various Ethernet data streams to be forwarded by the third type of Ethernet nodes can be ensured, the redundant design of the TSN shaper of the third type of Ethernet nodes can be reduced, and the cost is further reduced.

In some alternative embodiments, where the ethernet data stream that is forwardable by the third type of ethernet node comprises a multimedia stream, the third TSN shaper combination comprises a credit-based shaper comprising: in case the ethernet data stream that the third type of ethernet node can forward comprises only a non-time sensitive multimedia stream and/or one time sensitive multimedia stream, the third TSN shaper combination comprises a credit based shaper.

In this embodiment, in the case that the ethernet data stream that can be forwarded by the third type of ethernet node includes only a non-time-sensitive multimedia stream and/or a time-sensitive multimedia stream, the credit-based shaper may be applied to the non-time-sensitive multimedia stream and/or the time-sensitive multimedia stream, so that a sufficient transmission opportunity is reserved for the network control stream and the low-priority best effort data stream on the premise of guaranteeing the bandwidth requirement of the multimedia stream, thereby reducing the time delay of the network control stream and the best effort data stream.

In some alternative embodiments, the third TSN shaper set comprises an asynchronous shaper in case the ethernet data stream that is forwardable by the third type of ethernet node comprises a plurality of time sensitive multimedia streams, and the third TSN shaper set does not comprise an asynchronous shaper otherwise.

In this embodiment, in the case that the ethernet data stream that can be forwarded by the third type ethernet node includes multiple time-sensitive multimedia streams, the asynchronous shaper may be applied to the time-sensitive multimedia streams, so that the delay and jitter of each time-sensitive multimedia stream may be further reduced.

It should be noted that in this embodiment, in case the ethernet data stream that the third type of ethernet node can forward also includes a non-time sensitive multimedia stream, the credit-based shaper may be applied to the non-time sensitive multimedia stream. That is, where the ethernet data stream that is forwardable by the third type of ethernet node includes a non-time-sensitive multimedia stream and a plurality of time-sensitive multimedia streams, the third TSN shaper combination includes a credit-based shaper that acts on the non-time-sensitive multimedia stream and an asynchronous shaper that acts on the time-sensitive multimedia stream.

The following illustrates the selection strategy of the TSN shaper combinations of the third type of ethernet node (i.e. the third TSN shaper combinations described above) in connection with fig. 4, comprising the following steps, as shown in fig. 4:

Step 401, judging whether the transmitting port of the third type of ethernet node has multiple types of ethernet data streams, if so, executing step 402, and selecting a strict priority shaper to ensure the priority transmission of high priority data; otherwise, step 403 is performed directly.

Step 403, judging whether the third type of ethernet node has a time-sensitive control flow, if so, executing step 404, and selecting a time-sensitive shaper to ensure data transmission of the key time-sensitive control flow; otherwise, step 405 is performed directly.

Step 405, determining whether the rate of the transmitting port of the third type of ethernet node is greater than 100Mbps; if not, then execute step 406 to select a frame preemption shaper to reduce latency of the time sensitive control flow; otherwise step 407 is performed directly.

Step 407, determining whether the third type of ethernet node has a multimedia stream (including a time sensitive multimedia stream and a non-time sensitive multimedia stream), if yes, executing step 408, and selecting a credit-based shaper, so that a sufficient transmission opportunity is reserved for a low-priority Best Effort (BE) data stream on the premise of guaranteeing the bandwidth requirement of the non-time sensitive multimedia stream, thereby reducing the time delay of the best effort data stream. Otherwise, step 409 is performed.

Step 409, determining whether the third type of ethernet node includes multiple time-sensitive multimedia streams, if yes, executing step 410, and selecting an asynchronous shaper, where the asynchronous shaper is used for acting on the time-sensitive multimedia streams; otherwise, ending the flow. Compared to CBS, which can disperse transmission of single Class (Per-Class) data streams, ATS can disperse transmission of single data streams (Per-flow), thereby reducing delay and jitter of each time-sensitive multimedia stream.

It should be noted that, in the case that the third type of ethernet node includes multiple time-sensitive multimedia streams, the credit-based shaper may only act on non-time-sensitive multimedia streams; in case the third type of ethernet node does not comprise a plurality of time-sensitive multimedia streams, the credit-based shaper may be applied to all multimedia streams, i.e. comprising time-sensitive multimedia streams and non-time-sensitive multimedia streams.

In some optional embodiments, the priority of the ethernet data stream of the in-vehicle ethernet architecture is in order from high to low: time-sensitive control flows, time-sensitive multimedia flows, network control flows, non-time-sensitive media flows, best effort data flows.

In this embodiment, the time-sensitive control flow may include, but is not limited to, high-safety and high-real-time control data such as intelligent driving control command, braking control command, steering control command, etc.

The time-sensitive multimedia stream may include, but is not limited to, multimedia data such as intelligent driving related sensor (camera, lidar, etc.) data fusion, real-time map information, internet of vehicles (Vehicle to everything, V2X), etc., where the multimedia data may include audio, video, images, etc.

The network control flows may include, but are not limited to, related network control data such as generalized accurate time synchronization protocol (Generalized Precision Time Protocol, gPTP), link layer discovery protocol (Link Layer Discovery Protocol, LLDP), and the like.

The non-time sensitive control flow may include, but is not limited to, non-time sensitive control and status type data for a vehicle body (air conditioning, seat control, etc.), infotainment (human machine interface (Human Machine Interface, HMI) settings, emergency calls (ecalls), etc.).

Such non-time sensitive media streams may include, but are not limited to, camera data, entertainment related multimedia (e.g., audio, video) data in low speed or park scenarios.

The best effort data stream may include, but is not limited to, diagnostic, firmware Over-The-Air (FOTA), etc. data.

In this embodiment, priorities of the time-sensitive control flow, the time-sensitive multimedia flow, the network control flow, the non-time-sensitive media flow and the best effort data flow are sequentially reduced, so that each type of ethernet node of the vehicle-mounted ethernet architecture can perform transmission control on the ethernet data flow based on the priority order, and vehicle control can be more accurate and safer.

In some alternative embodiments, the first TSN shaper combination of the first ethernet node comprises the first TSN shaper combination in case the first ethernet node belongs to only the first class of ethernet nodes;

in case the first ethernet node belongs only to the second class of ethernet nodes, the TSN shaper combination of the first ethernet node comprises the second TSN shaper combination;

in the case that the first ethernet node belongs to the first class of ethernet nodes and belongs to the second class of ethernet nodes, the TSN shaper combination of the first ethernet node comprises the first TSN shaper combination and the second TSN shaper combination;

The first ethernet node is any ethernet node of the vehicle-mounted ethernet architecture.

In this embodiment, for each ethernet node of the vehicle-mounted ethernet architecture, if a certain ethernet node only belongs to the first type of ethernet node, the TSN shaper combination of the ethernet node may be a first TSN shaper combination; if a certain ethernet node only belongs to the second class of ethernet nodes, the TSN shaper combination of the ethernet node may be a second TSN shaper combination; if a certain ethernet node belongs to both the first class of ethernet nodes and the second class of ethernet nodes, the TSN shaper combination of the ethernet node may comprise a first TSN shaper combination and a second TSN shaper combination, i.e. both the TSN shaper of the first TSN shaper combination and the TSN shaper of the second TSN shaper combination, e.g. the first TSN shaper combination comprises a strict priority shaper and a time aware shaper, and the second TSN shaper combination comprises a frame preemption shaper, the TSN shaper combination of the ethernet node comprises a strict priority shaper, a time aware shaper and a frame preemption shaper.

It should be noted that, in the case that a certain ethernet node belongs to both the first type of ethernet node and the second type of ethernet node, if the first TSN shaper set and the second TSN shaper set each include a frame preemption shaper, the TSN shaper set of the ethernet node may include a frame preemption shaper. Furthermore, for each ethernet node, only the TSN shaper within the TSN shaper combination corresponding to the type of ethernet node to which it belongs may be included, without configuring all TSN shapers, which may reduce redundancy of the TSN shapers of the ethernet node.

In some optional embodiments, the on-board ethernet architecture includes N central controllers and M zone controllers, each of the zone controllers having a switch connected to at least one of the central controllers via ethernet, each of the central controllers having at least one first device connected to each of the zone controllers via ethernet, each of the zone controllers having at least one first device connected to each of the zone controllers via ethernet, N and M being positive integers, the first devices including at least one of a sensor and an actuator;

wherein the third class of ethernet nodes comprises the switch and the first ethernet node comprises at least one of the central controller, the zone controller and the first device.

In this embodiment, for each ethernet node of the vehicle ethernet architecture, that is, the central controller, the regional controller, the switch, and the sensor/executor, the TSN shaper combinations of each ethernet node may be determined according to the type to which each ethernet node belongs.

The central controller may be an HPC (High Performance Computer, high-performance computer) and is mainly used for deploying intelligent driving related functions (for example, sensor data fusion, transverse and longitudinal control such as braking/steering, etc.), intelligent cabin related functions (for example, map display, internet Application (APP), multimedia playing, etc.), intelligent networking (cellular network, internet of vehicles (V2X), etc.), FOTA host (Master), diagnostic brushing, etc.

The zone controller (Zonal) is mainly used for deploying driving and state acquisition functions of loads (such as acceleration sensors, electromagnetic valves, motors and the like) in various zones, and functions of actuators and sensor combination logic (such as door/lock control, high-voltage battery management, high-voltage capacity allocation and the like).

The first device (i.e., sensor or actuator) may include a camera, a lidar, a smart light drive, a speaker, a display screen, and a safety-related actuator (steering, braking, etc.), etc.

As shown in fig. 5, the on-vehicle ethernet architecture may include a first HPC, a second HPC, a first zone controller (Zonal), a second zone controller, a third zone controller, and a fourth zone controller, where the switches of the first HPC and the second HPC may be connected through ethernet with a bandwidth of Multi-G, and the switches of the first zone controller, the second zone controller, the third zone controller, and the fourth zone controller may be connected through ethernet with a bandwidth of 1000Mbps, respectively, and it should be noted that the dotted line connection in fig. 5 is a redundant connection. The first HPC exchanger, the second HPC exchanger, the first area controller exchanger, the second area controller exchanger, the third area controller exchanger and the fourth area controller exchanger are all connected with two sensors or actuators (S/A) through Ethernet with the bandwidth of 100 Mbps.

For each ethernet node shown in fig. 5, the TSN shaper combinations for each ethernet node may be determined according to the type to which each ethernet node belongs, respectively. For example, if the first HPC belongs to both the first type of ethernet node and the second type of ethernet node, the TSN shaper combination of the first HPC may include a first TSN shaper combination and a second TSN shaper combination; if a certain S/a belongs to only the first type of ethernet node, the TSN shaper combination of the S/a may include a first TSN shaper combination; if a certain S/a belongs only to the second type of ethernet node, the TSN shaper combination of the S/a may comprise a second TSN shaper combination. It should be noted that, the switch belongs to the third class of ethernet nodes, and the TSN shaper combination of the switch may include the third TSN shaper combination.

As can be seen from the above, the technical solution provided by the embodiments of the present disclosure can ensure low latency of ethernet data in the central computing+regional vehicle-mounted ethernet architecture; aiming at the characteristics of Ethernet nodes and Ethernet data streams, the TSN shapers are reasonably combined, so that invalid redundant design can be avoided; by abstracting the Ethernet data stream classification and the role of the Ethernet node, the technical scheme has universality.

The embodiment of the disclosure also provides a vehicle, which comprises the vehicle-mounted Ethernet architecture provided by any embodiment.

In the technical scheme of the disclosure, the related processes of collecting, storing, using, processing, transmitting, providing, disclosing and the like of the personal information of the user accord with the regulations of related laws and regulations, and the public order colloquial is not violated.

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.

Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program code may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus such that the program code, when executed by the processor or controller, causes the functions/operations specified in the flowchart and/or block diagram to be implemented. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and pointing device (e.g., a mouse or trackball) by which a user can provide input to the computer. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), and the internet.

The computer system may include a client and a server. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server may be a cloud server, a server of a distributed system, or a server incorporating a blockchain.

It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps recited in the present disclosure may be performed in parallel, sequentially, or in a different order, provided that the desired results of the disclosed aspects are achieved, and are not limited herein.

The above detailed description should not be taken as limiting the scope of the present disclosure. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present disclosure are intended to be included within the scope of the present disclosure.

Claims (11)

1. A vehicle-mounted ethernet architecture, the vehicle-mounted ethernet architecture comprising: a first type of ethernet node, a second type of ethernet node, and a third type of ethernet node, the first type of ethernet node being configured to transmit an ethernet data stream, the second type of ethernet node being configured to receive the ethernet data stream, the third type of ethernet node being configured to forward the ethernet data stream;

wherein the first type of ethernet node comprises a first time sensitive network TSN shaper combination comprising at least one TSN shaper determined from data stream transmission characteristic parameters of the first type of ethernet node;

the second type of ethernet node comprises a second TSN shaper combination comprising at least one TSN shaper determined from data stream reception characteristic parameters of the second type of ethernet node;

the third type of ethernet node comprises a third TSN shaper combination comprising at least one TSN shaper determined in accordance with data stream forwarding characteristic parameters of the third type of ethernet node.

2. The on-board ethernet architecture of claim 1, wherein said data stream transmission characteristic parameters comprise characteristic parameters of ethernet data streams transmittable by said first type of ethernet node and a rate of a transmission port of said first type of ethernet node;

and/or

The data stream receiving characteristic parameters comprise characteristic parameters of the Ethernet data stream receivable by the second type of Ethernet node and the rate of a receiving port of the second type of Ethernet node;

and/or

The data stream forwarding characteristic parameters include characteristic parameters of the ethernet data stream that the third type of ethernet node can forward and a rate of a transmission port of the third type of ethernet node.

3. The on-board ethernet architecture of claim 2, wherein:

the first TSN shaper set includes a strict priority shaper in case the ethernet data stream transmittable by the first type of ethernet node comprises a plurality of types of ethernet data streams, otherwise the first TSN shaper set does not include a strict priority shaper;

and/or

The first TSN shaper combination includes a time aware shaper in case the ethernet data stream transmittable by the first type of ethernet node comprises a time sensitive control stream, otherwise the first TSN shaper combination does not include a time aware shaper;

And/or

The first TSN shaper combination comprises a frame preemption shaper when the Ethernet data stream transmittable by the first type of Ethernet node comprises a time sensitive control stream and the rate of the Ethernet node transmission port of the first type is less than or equal to a first preset rate value, otherwise the first TSN shaper combination does not comprise a frame preemption shaper;

and/or

The first TSN shaper set includes a credit-based shaper in case the ethernet data stream transmittable by the first type of ethernet node comprises a non-time sensitive multimedia stream, and otherwise the first TSN shaper set does not include a credit-based shaper.

4. The on-board ethernet architecture of claim 2, wherein said second TSN shaper combination comprises a frame preemption shaper in case the ethernet data stream receivable by said second type of ethernet node comprises a time sensitive control stream and the rate of said second type of ethernet node transmit port is less than or equal to a second preset rate value, and wherein said second TSN shaper combination does not comprise a frame preemption shaper otherwise.

5. The on-board ethernet architecture of claim 2, wherein:

In the case that the ethernet data streams that the third type of ethernet node can forward include multiple types of ethernet data streams, the third TSN shaper combination includes a strict priority shaper, otherwise the third TSN shaper combination does not include a strict priority shaper;

and/or

In the case that the ethernet data stream that the ethernet node of the third type is capable of forwarding comprises a time-sensitive control stream, the third TSN shaper combination comprises a time-aware shaper, otherwise the third TSN shaper combination does not comprise a time-aware shaper;

and/or

The third TSN shaper combination includes a frame preemption shaper when the ethernet data stream that the third type of ethernet node can forward includes a time sensitive control stream and the rate of the third type of ethernet node transmit port is less than or equal to a third preset rate value, otherwise the third TSN shaper combination does not include a frame preemption shaper;

and/or

In case the ethernet data stream that the third type of ethernet node can forward comprises a multimedia stream, the third TSN shaper combination comprises a credit based shaper, otherwise the third TSN shaper combination does not comprise a credit based shaper.

6. The on-board ethernet architecture of claim 5, wherein, in the case where the third type of ethernet node-forwardable ethernet data stream comprises a multimedia stream, the third TSN shaper combination comprises a credit-based shaper comprising: in case the ethernet data stream that the third type of ethernet node can forward comprises only a non-time sensitive multimedia stream and/or one time sensitive multimedia stream, the third TSN shaper combination comprises a credit based shaper.

7. The on-board ethernet architecture of claim 6, wherein said third TSN shaper set comprises an asynchronous shaper in case the ethernet data stream that said third type of ethernet node can forward comprises a plurality of time sensitive multimedia streams, and wherein said third TSN shaper set does not comprise an asynchronous shaper otherwise.

8. The on-board ethernet architecture of claim 3 or 5, wherein the priority of the ethernet data streams of the on-board ethernet architecture is, in order from high to low: time-sensitive control flows, time-sensitive multimedia flows, network control flows, non-time-sensitive media flows, best effort data flows.

9. The in-vehicle ethernet architecture of any of claims 1 to 7, wherein:

in case the first ethernet node belongs only to the first class of ethernet nodes, the TSN shaper combination of the first ethernet node comprises the first TSN shaper combination;

in case the first ethernet node belongs only to the second class of ethernet nodes, the TSN shaper combination of the first ethernet node comprises the second TSN shaper combination;

in the case that the first ethernet node belongs to the first class of ethernet nodes and belongs to the second class of ethernet nodes, the TSN shaper combination of the first ethernet node comprises the first TSN shaper combination and the second TSN shaper combination;

the first ethernet node is any ethernet node of the vehicle-mounted ethernet architecture.

10. The on-board ethernet architecture of claim 9, comprising N central controllers and M zone controllers, each of said zone controllers having a switch connected to at least one of said central controllers via ethernet, each of said central controllers having a switch connected to at least one first device via ethernet, each of said zone controllers having a switch connected to at least one first device via ethernet, N and M being positive integers, said first devices comprising at least one of a sensor and an actuator;

Wherein the third class of ethernet nodes comprises the switch and the first ethernet node comprises at least one of the central controller, the zone controller and the first device.

11. A vehicle, characterized in that it comprises the on-board ethernet architecture of any one of claims 1 to 10.