Vehicle-mounted PON network communication system

Abstract

The utility model discloses a vehicle-mounted PON network communication system, which comprises an optical network domain unit, an ODN optical network unit and a branch network unit, the optical network domain unit is a central centralized processing unit of an optical line terminal and is used for point-to-multipoint of a single-fiber bidirectional network, the ODN optical network unit is an optical distribution network unit of passive light, and the branch network unit is used for point-to-multipoint of a single-fiber bidirectional network. The optical line terminal is electrically connected with the optical line terminal; according to the utility model, the number of the optical network domain unit is set to be one, and optical signal transmission between the optical distribution network unit and the plurality of branch network units is utilized, so that the traditional point-to-point network communication is replaced, and the whole vehicle network communication can be realized by only one optical network domain unit OLT and the plurality of branch network units ONU, thereby greatly reducing the number of optical fibers and optical modules, and reducing the cost. The cost is saved, the communication efficiency is improved through a PON network burst function mode, and the progress of automatic driving of the ADAS is accelerated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of vehicle-mounted optical communication, in particular to a PON network communication system for vehicle-mounted. BACKGROUND

[0002] With the improvement of ADAS (high-order driving auxiliary system) function and the attention of the industry to the automatic driving car, the increasing bit rate of intelligent car flows through the nervous system of the car, the camera, the sensor, the controller, the laser radar, V2X and other vehicle-mounted sensing systems are the basic configuration to realize the ADAS function, which causes huge data bandwidth demand to the vehicle-mounted communication network, the traditional communication protocol is difficult to meet the bandwidth demand of a large number of sensors and subsystems required by ADAS, and the optical fiber as the neuron of the system is more and more important.

[0003] In vehicle-mounted optical fiber communication, the traditional network architecture is point-to-point application, each branch network unit needs to be connected with the domain unit point-to-point, which leads to the domain unit needing to increase the switch to realize the multiway communication function, greatly improving the cost, and the complexity of 3-layer network switching is also greatly increased. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a PON network communication system for vehicle-mounted, which sets the optical network domain unit as one, utilizes the optical signal transmission of the optical distribution network unit and the plurality of branch network units, thereby replacing the traditional point-to-point network communication, only one optical network domain unit OLT and a plurality of branch network units ONU are needed to realize the whole vehicle network communication, and the problems of network switching complexity and insufficient communication efficiency are solved.

[0005] To achieve the above object, the utility model provides the following technical scheme: including optical network domain unit, ODN optical network unit and branch network unit:

[0006] The optical network domain unit is the central centralized processing unit of the optical line terminal, and is used for single-fiber bidirectional network point-to-multipoint optical fiber interconnection;

[0007] The ODN optical network unit is a passive optical distribution network unit, which is electrically connected with the optical line terminal, and is used for connecting the optical network domain unit downlink optical line terminal and uplink optical distribution network through passive optical distribution network;

[0008] The branch network unit is an optical network unit, which is electrically connected with the optical distribution network unit, and is used for branch network signal uplink and downlink communication, such as camera, sensor, laser radar, millimeter wave radar, 5G network communication and other branch signal processing;

[0009] Preferably, the optical distribution network unit respectively comprises a plurality of branch optical network units, cameras, 5G network communication, laser radar, millimeter wave radar and sensors, and is electrically connected with the optical distribution network unit, and the fiber access network communication mode is used for vehicle communication.

[0010] Preferably, the optical network domain unit OLT, the optical distribution network unit ODN and the optical network unit ONU form an optical access network, realize signal processing and network communication of the whole vehicle, and realize the ADAS L5 automatic driving function.

[0011] Preferably, the optical network domain unit OLT is one, the optical network unit ONU is a plurality of and is electrically connected with the independent optical distribution unit ODN and the optical network domain unit OLT, replaces the traditional point-to-point network communication, only one OLT and a plurality of ONUs are needed to realize the whole vehicle network communication, the number of optical fibers and optical modules is greatly reduced, cost is saved, and communication efficiency is improved.

[0012] Preferably, the optical distribution network unit is up to 64 network branch signal receiving and processing with a plurality of branch network units, realizes signal transmission and function control of the branch network unit by the single optical distribution network unit.

[0013] Preferably, the optical network domain unit OLT, the optical distribution network unit ODN and the optical network unit ONU form a PON system, wherein the PON system comprises a passive optical splitter, the optical line terminal OLT is connected to the optical distribution network unit ODN and a plurality of branch optical network units ONU through an optical fiber, and the passive optical splitter is used for distributing optical signals.

[0014] The PON network communication system for vehicle use provided by the utility model has at least the following beneficial effects:

[0015] By setting the optical network domain unit as one, the optical signal transmission of the optical distribution network unit and a plurality of branch network units is utilized, so that the traditional point-to-point network communication is replaced, only one optical network domain unit OLT and a plurality of branch network units ONU are needed to realize the whole vehicle network communication, the number of optical fibers and optical modules is greatly reduced, cost is saved, the communication efficiency is improved through the PON network burst function mode, and the progress of realizing the automatic driving of ADAS is accelerated. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The PON network communication system for vehicle use provided by the utility model has at least the following beneficial effects: DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0018] Please refer to Figure 1 The present application provides an embodiment of a PON network communication system for vehicle, comprising an optical network domain unit, an ODN optical network unit and a branch network unit:

[0019] The optical network domain unit is a central centralized processing unit of an optical line terminal, used for single-fiber bidirectional network point-to-multipoint optical fiber interconnection, realizing uplink and downlink signal processing;

[0020] The ODN optical network unit is a passive optical distribution network unit, electrically connected with the optical line terminal, used for connecting the downlink optical line terminal of the optical network domain unit and the uplink optical distribution network through the passive optical distribution network, realizing point-to-multipoint optical fiber interconnection;

[0021] The branch network unit is an optical network unit, electrically connected with the optical distribution network unit, used for uplink and downlink communication of branch network signals, the optical distribution network unit comprising a plurality of branch optical network units, a camera, a 5G network communication, a laser radar, a millimeter wave radar and a sensor, and electrically connected with the optical distribution network unit, using a fiber access network communication mode for vehicle communication, the optical distribution network unit and the plurality of branch network units for at most 64 network branch signal transceiving processing, realizing signal transmission and function control of the branch network unit by a single optical distribution network unit;

[0022] The optical network domain unit OLT, the optical distribution network unit ODN and the optical network unit ONU form a PON system, wherein the PON system comprises a passive optical splitter, so that the optical line terminal OLT is connected to the optical distribution network unit ODN and the plurality of branch optical network units ONU through an optical fiber, and the passive optical splitter is used for distributing optical signals.

[0023] Working principle: the PON network communication system for vehicle comprises an optical network domain unit, an ODN optical network unit and a branch network unit:

[0024] The optical access network is formed by the optical network unit OLT, the optical distribution network unit ODN and the optical network unit ONU, signal processing and network communication of the whole vehicle are realized, and the ADASL5 automatic driving function is realized, wherein the optical network unit OLT is one, so that signal transmission is realized through the optical network unit OLT and the optical distribution unit ODN, so as to replace the traditional point-to-point network communication, and only one optical network unit OLT and a plurality of optical distribution units ONU are needed to realize the whole vehicle network communication, the number of optical fibers and optical modules is reduced, and the communication efficiency is improved.

[0025] In the PON network communication system, the optical network unit is mainly composed of optical modules, point-to-multipoint is realized through the optical distribution unit ODN, that is, one optical module is connected to a plurality of branch optical modules through the optical distribution unit ODN, and a maximum of 64 network branch signals can be received and processed, a plurality of video cameras, millimeter wave radars, temperature sensors, tire pressure monitoring, 5G network signals, automatic sunroofs, seat heating, seat ventilation, seat adjustment, trunk opening and other interactive communication functions of the whole vehicle are realized, and the highest efficiency ADASL5 full-automatic driving function is realized.

[0026] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the involved claims.

[0027] In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two; the directions or position relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like are based on the directions or position relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term is connected, and the connection should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, can be mechanical connection, also can be electric connection, can be directly connected, also can be indirectly connected through the intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

Claims

1. A PON network communication system for in-vehicle use, characterized by comprising: Including an optical network domain unit, an ODN optical network unit and a branch network unit: The optical network domain unit is a central processing unit of an optical line terminal, used for single fiber bidirectional network point-to-multipoint optical fiber interconnection; The ODN optical network unit is a passive optical distribution network unit, electrically connected with the optical line terminal, used for connecting the optical network domain unit downlink optical line terminal and uplink optical distribution network through passive optical distribution network; The branch network unit is an optical network unit, electrically connected with the optical distribution network unit, used for uplink and downlink communication of branch network signals.

2. The PON network communication system for vehicle use according to claim 1, characterized by: The optical distribution network unit respectively includes a plurality of branch optical network units, cameras, 5G network communication, laser radar, millimeter wave radar and sensors, and is electrically connected with the optical distribution network unit.

3. The PON network communication system for vehicle use according to claim 1, characterized by: The optical network domain unit OLT, the optical distribution network unit ODN and the optical network unit ONU constitute an optical access network.

4. The PON network communication system for vehicle use according to claim 3, characterized by: The optical network domain unit OLT is one, and the optical network unit ONU is multiple and electrically connected with independent optical distribution unit ODN and optical network domain unit OLT.

5. The PON network communication system for vehicle use according to claim 1, characterized by: The optical distribution network unit and the plurality of branch network units have at most 64 network branch signal transceiving processing.

6. The PON network communication system for vehicle use according to claim 3, characterized by: The optical network domain unit OLT, the optical distribution network unit ODN and the optical network unit ONU constitute a PON system, wherein the PON system includes a passive optical splitter.

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