CN112153599B

CN112153599B - Message transmission method and device, internet of vehicles equipment and management node

Info

Publication number: CN112153599B
Application number: CN202011000497.9A
Authority: CN
Inventors: 房家奕; 胡金玲
Original assignee: CICTCI Technology Co Ltd
Current assignee: Datang Gaohong Zhilian Technology Chongqing Co ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2023-03-24
Anticipated expiration: 2040-09-22
Also published as: CN112153599A

Abstract

The invention provides a message transmission method and device, internet of vehicles equipment and a management node. The method is applied to the car networking device and comprises the following steps: determining a source MAC address and an opposite-end MAC address for sending unicast/multicast messages; generating an indication field related to the source MAC address and the opposite-end MAC address; and sending the unicast/multicast message carrying the indication field. The method and the device can solve the problem that the LTE-V2X does not support unicast and multicast communication on the straight-through link, and can meet the unicast or multicast communication requirements of wireless communication of the Internet of vehicles.

Description

Message transmission method and device, internet of vehicles equipment and management node

Technical Field

The invention relates to the technical field of communication, in particular to a message transmission method and device, internet of vehicles equipment and a management node.

Background

Currently, the V2X (Vehicle-to-Everything) technology is continuously supported by an ecosystem, and the C-V2X (Cellular) is an internet of vehicles technology based on a Cellular network, which enables vehicles to communicate with other surrounding vehicles and infrastructure, and shares real-time information of roads, and is a key to realize road traffic safety and access to automatic driving.

At present, LTE-V2X does not support unicast multicast communication on a Sidelink (direct link), but in the currently developed application of the internet of vehicles, there is a communication requirement for unicast multicast for wireless communication of the internet of vehicles, for example, for formation driving and sending of control commands of low-speed autonomous vehicles in a campus, unicast or multicast communication needs to be implemented to avoid that the control commands cannot implement confirmation of a controller and a controlled object, which causes the control commands to be executed by an uncontrolled target object by mistake. Therefore, a unicast and multicast vehicle networking communication method needs to be designed and applied to the existing LTE-V2X devices so as to support unicast and multicast communication of sildelink.

Disclosure of Invention

The invention provides a message transmission method and device, a vehicle networking device and a management node, and solves the problems that the existing LTE-V2X does not support unicast and multicast communication on a Sidelink (direct link) and cannot meet the communication requirement of unicast and multicast of wireless communication of vehicle networking.

In a first aspect, an embodiment of the present invention provides a message transmission method, applied to a vehicle networking device, including:

determining a source MAC address and an opposite-end MAC address for sending unicast/multicast messages;

generating an indication field related to the source MAC address and the opposite-end MAC address;

and sending the unicast/multicast message carrying the indication field.

Optionally, the determining a source MAC address and an opposite-end MAC address for sending the unicast/multicast message includes at least one of:

determining a source MAC address and/or an opposite-end MAC address according to a pre-configuration table; the pre-configuration table comprises a MAC address list or an identification list which has a corresponding relation with the MAC address;

receiving a source MAC address and/or an opposite-end MAC address which are/is used for the vehicle networking equipment to send unicast/multicast messages and sent by a management node, and correspondingly determining the source MAC address and/or the opposite-end MAC address as the source MAC address and/or the opposite-end MAC address which are/is used for sending the unicast/multicast messages;

and determining a source MAC address and/or an opposite-end MAC address for sending the current unicast/multicast message according to the candidate source MAC address set which can be used for sending the unicast/multicast message.

Optionally, the receiving a source MAC address and/or an opposite-end MAC address that are used for the car networking device to send the unicast/multicast message and sent by the management node includes:

sending request information for acquiring a source MAC address and/or an opposite-end MAC address to a management node of a unicast/multicast message through application layer messages or special Service Advertisement (DSA); the management node responds to the request information, determines a source MAC address and/or an opposite-end MAC address used for the vehicle networking equipment to send unicast/multicast messages, and sends first information carrying the source MAC address and/or the opposite-end MAC address to the vehicle networking equipment.

Optionally, the source MAC address and/or the peer MAC address, sent by the management node, for the car networking device to send the unicast/multicast message are allocated to the car networking device and sent to the car networking device by the management node when the management node detects the car networking device.

receiving the source MAC address and/or the opposite-end MAC address sent by the management node through application layer information; the management node sends a target layer address of the application layer message to the Internet of vehicles equipment, and the Internet of vehicles equipment determines that the application layer message is sent to the management node through the target layer address;

optionally, the receiving the source MAC address and/or the peer MAC address sent by the management node through an application layer message includes:

if the application layer message only comprises an opposite-end MAC address used for the vehicle networking equipment to send the unicast/multicast message, the source MAC address used for the vehicle networking equipment to send the unicast/multicast message is an MAC address corresponding to an address of a source layer used for the vehicle networking equipment to send a broadcast message, or the source MAC address is selected and determined by the vehicle networking equipment;

if the application layer message comprises an opposite-end MAC address and a source MAC address used for the vehicle networking equipment to send unicast/multicast messages, the source MAC address and the opposite-end MAC address are the source MAC address and the opposite-end MAC address carried in the application layer message when the vehicle networking equipment carries out unicast/multicast communication;

if the application layer message comprises a source MAC address used for the vehicle networking equipment to send the unicast/multicast message, the opposite-end MAC address used for the vehicle networking equipment to send the unicast/multicast message is a MAC address corresponding to a source layer address used for the management node to send the application layer message, or the source MAC address in a network layer primitive used for the management node to send the application layer message.

Optionally, the pre-configuration table includes one or more source MAC addresses respectively configured for the multiple pieces of vehicle networking equipment.

Optionally, the first information further includes at least one of:

the effective use time or the effective sending times of the source MAC address and/or the opposite-end MAC address;

and after the effective use time or the effective sending times of the source MAC address and/or the opposite-end MAC address are exceeded, replacing indication information of the source MAC address and/or the opposite-end MAC address.

Optionally, the replacement indication information of the source MAC address and/or the peer MAC address includes one of the following items:

the method comprises the steps that N1 alternative source MAC addresses and/or N2 alternative opposite-end MAC addresses used by the vehicle networking equipment are selected according to the sequence of effective use time; wherein, the N1 alternative source MAC addresses and/or the N2 alternative opposite end MAC addresses are preset with effective use time; n1 and N2 are positive integers;

the source MAC addresses of N3 candidates and/or the opposite end MAC addresses of N4 candidates are randomly selected and used by the Internet of vehicles; n3 and N4 are positive integers;

at least one set of replacement rules for the source MAC address and/or the peer MAC address.

Optionally, before the step of sending the unicast/multicast message carrying the indication field, the method further includes processing the unicast/multicast message carrying the indication field by using at least one of the following manners:

selecting an orthogonal code having a mapping relation with the source MAC address and/or the opposite-end MAC address, and coding the unicast/multicast message carrying the indication field;

selecting an encryption algorithm with a mapping relation with a source MAC address and/or an opposite-end MAC address to encrypt the unicast/multicast message carrying the indication field;

and selecting a security certificate having a mapping relation with the source MAC address and/or the opposite-end MAC address information to be added in the unicast/multicast message carrying the indication field.

The invention provides a message transmission method, which is applied to a management node and comprises the following steps:

determining a source MAC address and/or an opposite-end MAC address, wherein the source MAC address and the opposite-end MAC address are used for the vehicle networking equipment to send unicast/multicast messages;

and sending the source MAC address and/or the opposite-end MAC address to the Internet of vehicles equipment.

Optionally, the determining the source MAC address and/or the peer MAC address includes:

acquiring request information which is sent by the Internet of vehicles and used for acquiring the source MAC address and/or the opposite-end MAC address;

and the management node responds to the request information and determines the source MAC address and/or the opposite-end MAC address.

Optionally, the sending the source MAC address and/or the peer MAC address to the car networking device includes:

feeding back first information carrying the source MAC address and/or the opposite-end MAC address to the Internet of vehicles equipment;

the first information further comprises at least one of:

and after the effective use time or the effective sending times of the source MAC address and/or the opposite end MAC address are exceeded, replacing indication information of the source MAC address and/or the opposite end MAC address.

and under the condition that the vehicle networking equipment is detected, allocating the source MAC address and/or the opposite terminal MAC address to the vehicle networking equipment.

Optionally, when receiving a broadcast message sent by the vehicle networking device, determining that the vehicle networking device is detected;

the sending the source MAC address and/or the peer MAC address to the car networking device includes:

sending the source MAC address and/or the opposite-end MAC address to the Internet of vehicles equipment through application layer information;

and the address of the target layer for sending the application layer message is the address of the source layer for sending the broadcast message by the Internet of vehicles equipment.

Optionally, in the case that the vehicle networking device is detected, allocating a source MAC address and/or an opposite-end MAC address to the vehicle networking device includes one of the following:

allocating a source MAC address and/or an opposite terminal MAC address which are fixedly used for the Internet of vehicles equipment;

allocating a source MAC address and/or an opposite-end MAC address for the Internet of vehicles, and configuring the effective use time or the effective sending times of the source MAC address and/or the opposite-end MAC address;

allocating a source MAC address and/or an opposite terminal MAC address for the Internet of vehicles, and configuring the effective use time or the effective sending times of the source MAC address and/or the opposite terminal MAC address; and the replacement indication information of the source MAC address and/or the opposite terminal MAC address is/are obtained after the effective use time or the effective sending times of the source MAC address and/or the opposite terminal MAC address are exceeded.

The invention provides a message transmission device, which is applied to the vehicle networking equipment and comprises:

a first determining module, configured to determine a source MAC address and an opposite-end MAC address for sending a unicast/multicast message;

a processing module for generating an indication field related to the source MAC address and the peer MAC address;

and the first sending module is used for sending the unicast/multicast message carrying the indication field.

The invention provides a message transmission device, which is applied to a management node and comprises:

the second determining module is used for determining a source MAC address and an opposite-end MAC address, and the source MAC address and the opposite-end MAC address are used for the vehicle networking equipment to send unicast/multicast messages;

and the second sending module is used for sending the source MAC address and the opposite-end MAC address to the Internet of vehicles equipment.

The invention provides a vehicle networking device, comprising: a transceiver, a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method of transmitting a message as described in the first aspect when executing the computer program.

The present invention provides a management node, comprising: a transceiver, a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method of transmitting a message according to the second aspect when executing the computer program.

In a seventh aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the steps of the method for transmitting a message according to the first or second aspect.

The technical scheme of the invention has the beneficial effects that:

in the embodiment of the invention, the vehicle networking equipment determines the source MAC address and the opposite terminal MAC address for sending the unicast/multicast message; generating an indication field related to the source MAC address and the opposite-end MAC address; and the unicast/multicast message carrying the indication field is sent, so that unicast/multicast communication of LTE-V2X on a straight-through link can be realized, and the unicast or multicast communication requirements of wireless communication of the Internet of vehicles can be met.

Drawings

Fig. 1 shows one of the flow charts of a message transmission method of an embodiment of the present invention;

fig. 2 shows a second flowchart of a message transmission method according to an embodiment of the invention;

fig. 3 is a third flowchart of a message transmission method according to an embodiment of the present invention;

fig. 4 is one of structural diagrams showing a message transmission apparatus according to an embodiment of the present invention;

fig. 5 is a second block diagram of a message transmission apparatus according to an embodiment of the present invention;

FIG. 6 shows a block diagram of a vehicle networking device of an embodiment of the invention;

fig. 7 is a diagram showing a structure of a management node according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

In addition, the terms "system" and "network" are often used interchangeably herein.

In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

In the embodiment of the present invention, the access network may be an access network including a Macro Base Station (Macro Base Station), a micro Base Station (Pico Base Station), a Node B (3G mobile Station), an enhanced Base Station (eNB), a Home enhanced Base Station (Femto eNB or Home eNode B or Home eNB or HeNB), a relay Station, an access point, a Remote Radio Unit (RRU), a Remote Radio Head (RRH Head), and the like. The user terminal may be a mobile phone (or handset), or other device capable of sending or receiving wireless signals, including user Equipment, a Personal Digital Assistant (PDA), a wireless modem, a wireless communicator, a handheld device, a laptop computer, a cordless telephone, a Wireless Local Loop (WLL) station, a CPE (Customer premises Equipment) or mobile smart hotspot capable of converting mobile signals into WiFi signals, a smart appliance, or other device capable of autonomously communicating with a mobile communication network without human operation, etc.

Specifically, the embodiment of the invention provides a message transmission method, which solves the problems that in the prior art, LTE-V2X does not support unicast multicast communication on a direct link and cannot meet the unicast or multicast communication requirements of wireless communication of Internet of vehicles.

First embodiment

As shown in fig. 1, an embodiment of the present invention provides a message transmission method, which is applied to a car networking device, and specifically includes the following steps:

step 11: determining a source MAC address and an opposite-end MAC address for sending unicast/multicast messages;

wherein, the unicast/multicast message is a unicast message or a multicast message; the peer MAC address is the destination MAC address. The range of the Source MAC address (Source MAC address) of unicast/multicast is 0-16777215, and the range of the opposite terminal MAC address (Peer MAC address) is: 0-16777215.

Step 12: generating an indication field related to the source MAC address and the opposite-end MAC address;

in this step, if a source MAC address and an opposite-end MAC address are obtained in step 11, a field related to the unicast/multicast MAC address is directly generated according to the obtained source MAC address and the obtained opposite-end MAC address: if a source MAC address set and/or an opposite-end MAC address set are/is obtained, 1 source MAC address and one opposite-end MAC address are respectively determined from the sets, and fields related to the unicast/multicast MAC address are directly generated according to the obtained source MAC address and the obtained opposite-end MAC address; if the target identification is determined first, 1 source MAC address and an opposite-end MAC address are determined from the available MAC address set according to the corresponding relation between the target identification and the MAC address, and fields related to the unicast/multicast MAC address are generated.

Further, the indication field associated with the source MAC address may include:

source MAC address in dsm.indication or dsm.request service primitives;

source _ address in advance service primitive;

a Destination _ Layer-2 ID in an ACCESS-layer.indication or ACCESS-layer.request service primitive;

the indication field associated with the peer MAC address may include:

indication or Peer MAC address in DSM.request service primitive;

indication or Destination _ address in an application _ indication.request service primitive;

the above is an exemplary illustration, and the source MAC address and the destination MAC address filled in the other fields are not limited.

Step 13: and sending the unicast/multicast message carrying the indication field.

In this step, the car networking device sends the unicast/multicast message carrying the indication field by using the direct link, and the other car networking devices receive the unicast/multicast message, and can judge whether the received message is the unicast/multicast message according to the source MAC address and/or the opposite-end MAC address in the unicast/multicast message, and then judge whether the message needs to be analyzed, if so, execute the analysis, and if not, directly discard the message.

Specifically, if it is determined that the message received through the direct link includes an indication field related to the MAC address of the unicast/multicast message, and the indication field is the same as an indication field related to the MAC address where the current type unicast/multicast message is sent by the device (the above other pieces of vehicle networking device): then the analysis is carried out; otherwise, the message is not analyzed and discarded.

In the embodiment, the vehicle networking device determines a source MAC address and an opposite-end MAC address for sending the unicast/multicast message; generating an indication field related to the source MAC address and the opposite-end MAC address; and the unicast/multicast message carrying the indication field is sent, so that unicast/multicast communication of LTE-V2X on a straight-through link can be realized, and the unicast or multicast communication requirements of wireless communication of the Internet of vehicles are met.

It should be noted that, the source MAC address may be replaced by at least one of the following parameters: the mapping relationship between at least one of the application service identification, the device application layer identification, the device user identification card identification, the vehicle identification, the station identification, the fleet identification, the security certificate, the default MAC address of the device, the application service identification, the device application layer identification, the vehicle identification, the fleet identification and the station identification and the source MAC address.

The opposite-end MAC address can be replaced by at least one of the following parameters: the mapping relation between at least one of the application service identification, the equipment application layer identification, the equipment user identification card identification, the vehicle identification, the station identification, the motorcade identification, the safety certificate, the default MAC address of the equipment, the application service identification, the equipment application layer identification, the vehicle identification, the motorcade identification and the station identification and the MAC address of the opposite terminal.

In an embodiment, before step 13, the method further includes processing the unicast/multicast message carrying the indication field by using at least one of the following manners:

In this embodiment, the unicast/multicast message carrying the indication field may be encoded and encrypted, and the source MAC address and/or the peer MAC address may be replaced with a security certificate, so as to implement secure transmission of the source MAC address and the peer MAC address, and the peer device may perform decryption and decryption processing after receiving the unicast/multicast message, or may determine the source MAC address and/or the peer MAC address through a mapping relationship between the security certificate and the source MAC address and/or the peer MAC address. In this way, secure transmission of unicast/multicast messages can be achieved.

Step 11 described above will be described below.

In one embodiment, the step 11 includes at least one of the following three ways:

in a first mode

in the first mode, the pre-configuration table includes a list of MAC addresses of pre-configured unicast/multicast message sending devices in a fixed group (pair), or an identification list having a correspondence relationship with the MAC addresses. The configuration table comprises one or more source MAC addresses which are respectively and correspondingly configured for a plurality of pieces of vehicle networking equipment.

When a source MAC address is configured correspondingly to the vehicle networking equipment in the pre-configuration table, the source MAC address is a MAC address randomly selected from an available MAC address set or a MAC address having a mapping relation with a target identifier;

when the car networking device in the pre-configuration table is configured with a plurality of source MAC addresses correspondingly, the source MAC addresses are a plurality of MAC addresses randomly selected from an available MAC address set, or a subset of MAC addresses randomly selected from a candidate MAC address set, or a plurality of MAC addresses having a mapping relation with a target identifier.

For example, in available unicast/multicast MAC addresses, one or more source MACs are configured for each device in turn; wherein, in the available MAC address set, the MAC address excluded for broadcasting is the available unicast/multicast MAC address. Specifically, if a source MAC address is configured, the MAC address may be determined by random selection or according to a mapping relationship between the MAC address and other identifiers. And after the determination, the selected MAC address can be excluded from the available unicast/multicast MAC addresses, so that the available unicast/multicast MAC addresses can be updated. If a plurality of candidate source MAC addresses are configured, a plurality of MAC addresses may be randomly selected, or one set may be selected from a plurality of candidate MAC address sets that are pre-configured, or a plurality of candidate MAC addresses may be determined according to the correspondence between the identifiers and the MAC addresses. After the determination, the selected MAC address can be excluded from the available unicast/multicast MAC addresses, so that the available unicast/multicast MAC addresses can be updated.

Mode two

In a second mode, a source MAC address and/or an opposite-end MAC address sent by a management node and used for a car networking device to send a unicast/multicast message are received and correspondingly determined as the source MAC address and/or the opposite-end MAC address used for sending the unicast/multicast message, the management node for the unicast/multicast message includes: a Road Side Unit (RSU) and an On Board Unit (OBU) having an application management function or a group management function, or an application server having a communication connection with the RSU.

Specifically, the above two modes include the following two cases:

case 1:

sending request information for acquiring a source MAC address and/or an opposite-end MAC address to a management node of a unicast/multicast message through application layer messages or special service bulletin DSA; the management node responds to the request information, determines a source MAC address and/or an opposite-end MAC address used for the vehicle networking equipment to send unicast/multicast messages, and sends first information carrying the source MAC address and/or the opposite-end MAC address to the vehicle networking equipment.

In this case, the management node determines the source MAC address and/or the peer MAC address in response to the request message, through a statement message sent by the car networking device or through a MAC address in a process of sending a service by the car networking device before. And feeding back the first information carrying the source MAC address and/or the opposite-end MAC address to the vehicle networking equipment sending the request information through application layer information or DSA notification.

It should be noted that the source MAC address and/or the peer MAC address sent by the management node is the source MAC address and/or the peer MAC address fixedly used by the requesting car networking device, or the source MAC address and/or the peer MAC address with valid use time or valid use times.

Further, in an embodiment, in a case that the source MAC address and/or the peer MAC address sent by the management node is a source MAC address and/or a peer MAC address with valid use time or valid use times, the first information further includes at least one of the following:

Specifically, the replacement indication information of the source MAC address and/or the peer MAC address includes one of the following items:

the method comprises the steps that N1 alternative source MAC addresses and/or N2 alternative opposite-end MAC addresses used for the Internet of vehicles equipment are selected according to the sequence of effective use time; wherein, the N1 alternative source MAC addresses and/or the N2 alternative opposite end MAC addresses are preset with effective use time; n1 and N2 are positive integers;

For example, after the effective use time or the effective sending times of the source MAC address and/or the peer MAC address of the requesting car networking device is over, the replacement method of the source MAC address and/or the peer MAC address includes:

the unicast/multicast message management node configures and determines N1 available alternative source MAC addresses and/or N2 available alternative opposite end MAC addresses, wherein N1 is an integer larger than or equal to 1, and N2 is an integer larger than or equal to 1; the equipment sending the request uses the parameters according to the time sequence of the effective use time, and the corresponding parameters are deleted from the alternative set when the parameters are used once;

the unicast/multicast message management node configures and determines N1 available alternative source MAC addresses and/or N2 available alternative opposite-end MAC addresses, wherein N1 is an integer larger than or equal to 1, and N2 is an integer larger than or equal to 1; randomly selecting 1 use from the request device, and deleting the corresponding address in the alternative set once each use;

the unicast/multicast message management node configures at least one set of replacement rules to the equipment sending the request according to the replacement rules pre-configured in the application management platform, the equipment sending the request uses the unique replacement rules, or uses the replacement rules in sequence, or randomly selects one set of replacement rules for replacement, and the rules are continuously used after being determined.

Case 2:

the source MAC address and/or the opposite-end MAC address which are/is used for the vehicle networking equipment to send unicast/multicast messages and sent by the management node are/is distributed to the vehicle networking equipment and sent to the vehicle networking equipment by the management node under the condition that the vehicle networking equipment is detected by the management node.

In this case 2, the management node determines that another car networking device supporting direct communication appears in the communication range of the direct link when receiving a unicast/multicast message or a broadcast message sent by the car networking device. And under the condition that the vehicle networking equipment is determined to be detected, distributing unicast/multicast communication source MAC addresses and/or opposite-end MAC addresses for the detected vehicle networking equipment supporting direct communication, and feeding back to the vehicle networking equipment by sending application layer messages or DSAs (digital subscriber line).

It should be noted that the source MAC address and/or the peer MAC address allocated by the management node is a source MAC address and/or a peer MAC address fixedly used by the car networking device, or a source MAC address and/or a peer MAC address having valid use time or valid use times.

Further, the receiving a source MAC address and/or an opposite-end MAC address, which are used for the car networking device to send the unicast/multicast message and sent by the management node, includes:

receiving the source MAC address and/or the opposite-end MAC address sent by the management node through application layer information; the management node sends the target layer address of the application layer message to the source layer address of the broadcast message sent by the vehicle networking equipment, and the vehicle networking equipment determines that the application layer message is sent to the vehicle networking equipment through the target layer address.

For example, if the unicast/multicast message management node learns the existence of the other vehicle networking device by receiving the broadcast message sent by the other vehicle networking device, allocating a source MAC address for unicast and multicast communication to the vehicle networking device includes:

a source MAC address assigned to the internet of vehicles device for unicast/multicast communication;

the management node adopts a source MAC address fixed by the management node or selects the source MAC address for the management node;

the management node sends the MAC address (a source MAC address which is allocated to the vehicle networking equipment and used for unicast/multicast communication, a source MAC address fixed by the management node or a source MAC address selected by the management node) to corresponding vehicle networking equipment through application layer information, and the target layer address of the sent information is the source layer address of broadcast sent by the corresponding vehicle networking equipment;

and after receiving the message, the corresponding vehicle networking equipment determines that the application layer message is sent to the corresponding vehicle networking equipment through the target layer address, decodes the application layer message and acquires a source MAC address and an opposite terminal MAC address.

Specifically, the receiving the source MAC address and/or the peer MAC address sent by the management node through the application layer message includes:

Mode III

For example, the car networking device obtains an identifier available for unicast/multicast message sending, determines a corresponding candidate source MAC address set according to a mapping relationship between the identifier and a MAC address, further determines a source MAC address and/or an opposite-end MAC address for current unicast/multicast message sending from the candidate source MAC address set, and notifies an opposite-end device and/or a unicast/multicast message management node of the unicast/multicast message through an application layer message or DSA.

Wherein the identification comprises at least one of:

identification in security certificates, including but not limited to identification in registration certificates, pseudonym certificates, identity certificates, application certificates;

an application layer identification set having a mapping relation with the service and equipment identification corresponding to the current unicast/multicast message;

application service identification (Application ID).

Second embodiment

As shown in fig. 7, a second embodiment of the present invention provides a message transmission method, which is applied to a management node, where the management node includes: a Road Side Unit (RSU) and an On Board Unit (OBU) having an application management function or a group management function, or an application server having a communication connection with the RSU. The message transmission method specifically comprises the following steps:

step 21: determining a source MAC address and/or an opposite-end MAC address, wherein the source MAC address and the opposite-end MAC address are used for the vehicle networking equipment to send unicast/multicast messages;

wherein, the opposite terminal MAC address is the destination MAC address. The range of the Source MAC address (Source MAC address) of the unicast and multicast is 0-16777215, and the range of the opposite end MAC address (Peer MAC address) is as follows: 0-16777215.

Step 22: and sending the source MAC address and/or the opposite-end MAC address to the Internet of vehicles equipment.

After receiving the source MAC address and/or the opposite-end MAC address, the vehicle networking equipment further sends a unicast/multicast message carrying the indication field according to the indication field generated and relevant to the source MAC address and the opposite-end MAC address, and unicast multicast communication of LTE-V2X on the direct link is achieved.

In this embodiment, a management node determines a source MAC address and/or an opposite-end MAC address for the car networking device to send a unicast/multicast message, and sends the source MAC address and/or the opposite-end MAC address to the car networking device. The vehicle networking equipment realizes unicast and multicast communication of LTE-V2X on the straight-through link according to the source MAC address and/or the opposite end MAC address, and the unicast or multicast communication requirements of wireless communication of the vehicle networking are met.

Optionally, the step 21 includes the following two cases:

case 1

the management node responds to the request information and determines the source MAC address and/or the opposite-end MAC address;

it should be noted that the source MAC address and/or the peer MAC address determined by the management node are the source MAC address and/or the peer MAC address fixedly used by the requesting car networking device, or the source MAC address and/or the peer MAC address having valid use time or valid use times.

In this case, the step 22 may include:

the first information further comprises at least one of:

In an embodiment, the replacement indication information of the source MAC address and/or the peer MAC address includes one of the following:

the unicast/multicast message management node configures and determines N1 available alternative source MAC addresses and/or N2 available alternative opposite end MAC addresses, wherein N1 is an integer larger than or equal to 1, and N2 is an integer larger than or equal to 1; randomly selecting 1 from the request devices for use, and deleting the corresponding address in the alternative set once each time the address is used;

Case 2

In this case 2, the management node determines that another car networking device supporting direct communication appears in the communication range of the direct link when receiving a unicast/multicast message or a broadcast message sent by the car networking device.

Further, in the case that the vehicle networking device is detected, allocating a source MAC address and/or a peer MAC address to the vehicle networking device includes one of the following:

allocating a source MAC address and/or an opposite terminal MAC address which are fixedly used for the Internet of vehicles;

allocating a source MAC address and/or an opposite-end MAC address for the Internet of vehicles, and configuring the effective use time or the effective sending times of the source MAC address and/or the opposite-end MAC address; and the replacement indication information of the source MAC address and/or the opposite terminal MAC address is/are obtained after the effective use time or the effective sending times of the source MAC address and/or the opposite terminal MAC address are exceeded.

the method comprises the steps that N1 alternative source MAC addresses and/or N2 alternative opposite-end MAC addresses used by the vehicle networking equipment are selected according to the sequence of effective use time; the N1 alternative source MAC addresses and/or N2 alternative opposite end MAC addresses are/is preset with effective use time; n1 and N2 are positive integers;

at least one set of replacement rules for source MAC address and/or peer MAC address.

the unicast/multicast message management node configures and determines N1 available alternative source MAC addresses and/or N2 available alternative opposite-end MAC addresses, wherein N1 is an integer larger than or equal to 1, and N2 is an integer larger than or equal to 1; randomly selecting 1 from the request devices for use, and deleting the corresponding address in the alternative set once each time the address is used;

In one embodiment, when receiving a broadcast message sent by the vehicle networking device, the management node determines that the vehicle networking device is detected; in this case, the step 22 includes:

sending the source MAC address and/or the opposite-end MAC address to the Internet of vehicles equipment through application layer information; and the target layer address for sending the application layer message is the source layer address for sending the broadcast message by the Internet of vehicles equipment.

In this embodiment, the car networking device that receives the application layer message determines that the application layer message is sent to itself through the target layer address.

According to the scheme, the management, distribution and notification of the MAC address sent by the unicast and multicast message of the internet-of-vehicles equipment are carried out through the unicast and multicast management node.

The method for transmitting the message is generally described below with respect to fig. 3. The method comprises the following steps:

step 31, a service packet of the unicast/multicast message is generated for the first time;

step 32, the vehicle networking equipment determines a source MAC address and an opposite terminal MAC address;

the determination is as follows:

mode 1: determined according to a configuration parameter table (pre-configuration table);

mode 2: sending a request acquisition to a unicast/multicast management node or opposite terminal equipment;

mode 3: the unicast/multicast management node distributes the detected equipment;

mode 4: the vehicle networking equipment determines by itself;

step 33, the vehicle networking device sends a unicast/multicast message;

step 34, configuring security policies corresponding to the source MAC address of the sending device and the peer MAC address when sending the unicast/multicast message.

Third embodiment

As shown in fig. 4, an embodiment of the present invention provides a message transmission apparatus 400, applied to a car networking device, including:

a first determining module 401, configured to determine a source MAC address and an opposite-end MAC address for sending a unicast/multicast message;

a processing module 402, configured to generate an indication field related to the source MAC address and the peer MAC address;

a first sending module 403, configured to send a unicast/multicast message carrying the indication field.

Optionally, the first determining module 401 includes:

the first determining submodule is used for determining a source MAC address and/or an opposite terminal MAC address according to the pre-configuration table; the pre-configuration table comprises a MAC address list or an identification list which has a corresponding relation with the MAC address;

the second determining submodule is used for receiving a source MAC address and/or an opposite-end MAC address which are/is sent by the management node and used for the vehicle networking equipment to send the unicast/multicast message, and correspondingly determining the source MAC address and/or the opposite-end MAC address as the source MAC address and/or the opposite-end MAC address used for sending the unicast/multicast message;

and the third determining submodule is used for determining a source MAC address and/or an opposite-end MAC address for sending the current unicast/multicast message according to the candidate source MAC address set which can be used for sending the unicast/multicast message.

Optionally, the second determining sub-module includes:

a first obtaining unit, configured to send, to a management node of a unicast/multicast message, request information for obtaining a source MAC address and/or an opposite-end MAC address through an application layer message or a Dedicated Service Advertisement (DSA); the management node responds to the request information, determines a source MAC address and/or an opposite-end MAC address used for the vehicle networking equipment to send unicast/multicast messages, and sends first information carrying the source MAC address and/or the opposite-end MAC address to the vehicle networking equipment.

Optionally, the second determining sub-module includes:

a second obtaining unit, configured to receive the source MAC address and/or the peer MAC address sent by the management node through an application layer message; the management node sends a target layer address of the application layer message to the Internet of vehicles equipment, and the Internet of vehicles equipment determines that the application layer message is sent to the management node through the target layer address;

optionally, when receiving the source MAC address and/or the peer MAC address sent by the management node through the application layer message, the second obtaining unit is specifically configured to:

Optionally, the first information further includes at least one of:

n3 alternative source MAC addresses and/or N4 alternative peer MAC addresses for the Internet of vehicles equipment to use at random; n3 and N4 are positive integers;

Optionally, the apparatus 400 further includes:

a first processing module, configured to select an orthogonal code having a mapping relationship with the source MAC address and/or an opposite-end MAC address, and encode the unicast/multicast message carrying the indication field;

the second processing module is used for selecting an encryption algorithm with a mapping relation with a source MAC address and/or an opposite-end MAC address to encrypt the unicast/multicast message carrying the indication field;

and the third processing module is used for selecting the security certificate which has a mapping relation with the source MAC address and/or the opposite-end MAC address information to be added into the unicast/multicast message carrying the indication field.

The embodiment of the message transmission device of the present invention corresponds to the method of the first embodiment, and all the implementation means in the first embodiment are applied to the embodiment of the message transmission device, so that the same technical effects can be achieved.

Fourth embodiment

As shown in fig. 5, an apparatus 500 for transmitting a message according to an embodiment of the present invention is applied to a management node, and the apparatus 500 includes:

a second determining module 501, configured to determine a source MAC address and/or an opposite-end MAC address, where the source MAC address and the opposite-end MAC address are used for the car networking device to send a unicast/multicast message;

a second sending module 502, configured to send the source MAC address and/or the peer MAC address to the car networking device.

Optionally, the second determining module 501 includes:

a third obtaining unit, configured to obtain request information sent by the vehicle networking device and used for obtaining the source MAC address and/or the peer MAC address;

a first determining unit, configured to determine, by the management node, the source MAC address and/or the peer MAC address in response to the request information.

Optionally, the first information further includes at least one of:

Optionally, the second determining module 501 includes:

and the distribution submodule is used for distributing the source MAC address and/or the opposite terminal MAC address to the vehicle networking equipment under the condition that the vehicle networking equipment is detected.

Optionally, when a broadcast message sent by the vehicle networking device is received, it is determined that the vehicle networking device is detected;

the second sending module 502 includes:

the sending unit is used for sending the source MAC address and/or the opposite-end MAC address to the Internet of vehicles equipment through application layer information; and the target layer address for sending the application layer message is the source layer address for sending the broadcast message by the Internet of vehicles equipment.

Optionally, the allocation submodule includes:

the first allocation unit is used for allocating a source MAC address and/or an opposite-end MAC address which are fixedly used for the Internet of vehicles equipment;

the second allocation unit is used for allocating a source MAC address and/or an opposite-end MAC address for the vehicle networking equipment and allocating effective use time or effective sending times of the source MAC address and/or the opposite-end MAC address;

a third allocation unit, configured to allocate a source MAC address and/or an opposite-end MAC address to the car networking device, and allocate effective usage time or effective transmission times of the source MAC address and/or the opposite-end MAC address; and the replacement indication information of the source MAC address and/or the opposite terminal MAC address is/are obtained after the effective use time or the effective sending times of the source MAC address and/or the opposite terminal MAC address are exceeded.

The message transmission apparatus 500 is an apparatus corresponding to the method in the second embodiment, and all the implementation means in the method embodiment are applied to the embodiment of the message transmission apparatus, so that the same technical effects can be achieved.

Fifth embodiment

In order to better implement the peer-to-peer method, as shown in fig. 6, a fourth embodiment of the present invention further provides a vehicle networking device, including:

a processor 600; and a memory 620 connected to the processor 600 through a bus interface, wherein the memory 620 is used for storing programs and data used by the processor 600 in executing operations, and the processor 600 calls and executes the programs and data stored in the memory 620.

The transceiver 610 is connected to the bus interface, and is configured to receive and transmit data under the control of the processor 600; the processor 600 is used to read programs from the memory 620.

Specifically, the processor 600 is configured to determine a source MAC address and an opposite-end MAC address for sending a unicast/multicast message; generating an indication field related to the source MAC address and the opposite-end MAC address;

the transceiver 610 is configured to send a unicast/multicast message carrying the indication field.

Where in fig. 6, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 600 and memory represented by memory 620. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 610 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. For different terminals, the user interface 630 may also be an interface capable of interfacing with a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 600 in performing operations.

Optionally, when determining the source MAC address and the peer MAC address used for sending the unicast/multicast message, the processor 600 is specifically configured to at least one of:

Optionally, when receiving the source MAC address and/or the peer MAC address, which are used by the car networking device to send the unicast/multicast message and are sent by the management node, the processor 600 is specifically configured to:

Optionally, when receiving the source MAC address and/or the peer MAC address, which are used by the car networking device to send the unicast/multicast message and are sent by the management node, the processor 600 is further specifically configured to:

optionally, when receiving the source MAC address and/or the peer MAC address sent by the management node through the application layer message, the processor 600 is specifically configured to:

Optionally, the first information further includes at least one of:

Optionally, before the step of sending the unicast/multicast message carrying the indication field, the processor 600 is configured to perform at least one of the following processes on the unicast/multicast message carrying the indication field:

selecting an encryption algorithm having a mapping relation with a source MAC address and/or an opposite-end MAC address to encrypt the unicast/multicast message carrying the indication field;

Those skilled in the art will appreciate that all or part of the steps for implementing the above embodiments may be performed by hardware, or may be instructed to be performed by associated hardware by a computer program that includes instructions for performing some or all of the steps of the above methods; and the computer program may be stored in a readable storage medium, which may be any form of storage medium.

Fifth embodiment

In order to better implement the above peer end, as shown in fig. 7, a fourth embodiment of the present invention further provides a management node, including:

a processor 700; and a memory 720 connected to the processor 700 through a bus interface, wherein the memory 720 is used for storing programs and data used by the processor 700 when executing operations, and the processor 700 calls and executes the programs and data stored in the memory 720.

The transceiver 710 is connected to the bus interface, and is configured to receive and transmit data under the control of the processor 700; the processor 700 is used to read programs in the memory 720.

Specifically, the processor 700 is configured to determine a source MAC address and/or an opposite-end MAC address, where the source MAC address and the opposite-end MAC address are used for the car networking device to send a unicast/multicast message.

The transceiver 710 is configured to send the source MAC address and/or the peer MAC address to the car networking device.

Where in fig. 7, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 700 and memory represented by memory 720. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 710 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 may store data used by the processor 700 in performing operations.

Optionally, when determining that the source MAC address and/or the peer MAC address are/is sent to the car networking device, the processor 700 is specifically configured to:

Optionally, the first information further includes at least one of:

when the processor 700 sends the source MAC address and/or the peer MAC address to the car networking device, the processor is specifically configured to:

Optionally, the processor 700 is specifically configured to, when the vehicle networking device is detected and a source MAC address and/or an opposite-end MAC address are allocated to the vehicle networking device, one of the following:

In addition, the present invention provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of the method in the first embodiment or the second embodiment described above. And the same technical effect can be achieved, and in order to avoid repetition, the description is omitted.

Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the peer of the present invention can also be implemented by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. Thus, the peer of the present invention can also be realized by merely providing a program product containing program code for implementing the method or apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is also noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A message transmission method is applied to a vehicle networking device and comprises the following steps:

determining a source MAC address and a peer MAC address for sending unicast/multicast messages, comprising: receiving a source MAC address and/or an opposite-end MAC address which are/is used for the vehicle networking equipment to send unicast/multicast messages and sent by a management node, and correspondingly determining the source MAC address and/or the opposite-end MAC address as the source MAC address and/or the opposite-end MAC address which are/is used for sending the unicast/multicast messages;

generating an indication field related to the source MAC address and the opposite-end MAC address, wherein the indication field comprises the source MAC address and the opposite-end MAC address;

and sending the unicast/multicast message carrying the indication field.

2. The message transmission method according to claim 1, wherein the determining a source MAC address and a peer MAC address for sending the unicast/multicast message further comprises at least one of:

3. The message transmission method according to claim 1, wherein the receiving management node sends a source MAC address and/or a peer MAC address for the car networking device to send the unicast/multicast message, and the method comprises:

4. The message transmission method according to claim 1, wherein the source MAC address and/or the peer MAC address sent by the management node for the car networking device to send the unicast/multicast message are allocated by the management node for the car networking device and sent to the car networking device when the car networking device is detected.

5. The message transmission method according to claim 4, wherein the receiving management node sends a source MAC address and/or a peer MAC address for the car networking device to send the unicast/multicast message, and the method comprises the following steps:

6. The message transmission method according to claim 5, wherein the receiving the source MAC address and/or the peer MAC address sent by the management node through an application layer message comprises:

7. The message transmission method according to claim 2, wherein the pre-configured table includes one or more source MAC addresses respectively configured for a plurality of car networking devices.

8. The method of transmitting a message according to claim 3, wherein the first information further comprises at least one of:

9. The message transmission method according to claim 8, wherein the replacement indication information of the source MAC address and/or the peer MAC address comprises one of the following:

10. A message transmission method is applied to a management node and comprises the following steps:

determining a source MAC address and/or an opposite-end MAC address, wherein the source MAC address and the opposite-end MAC address are used for the vehicle networking equipment to send unicast/multicast messages, and the method comprises the following steps: acquiring request information which is sent by the Internet of vehicles and used for acquiring the source MAC address and/or the opposite-end MAC address; the management node responds to the request information and determines the source MAC address and/or the opposite-end MAC address;

and sending the source MAC address and/or the opposite-end MAC address to the vehicle networking equipment, wherein the vehicle networking equipment contains the source MAC address and the opposite-end MAC address in an indication field.

11. The method for transmitting the message according to claim 10, wherein the sending the source MAC address and/or the peer MAC address to a car networking device comprises:

the first information further comprises at least one of:

12. The message transmission method according to claim 10, wherein the determining the source MAC address and/or the peer MAC address comprises:

13. The message transmission method according to claim 12, wherein the detection of the vehicle networking device is determined upon receiving a broadcast message sent by the vehicle networking device;

14. The message transmission method according to claim 12, wherein the allocating a source MAC address and/or a peer MAC address to the car networking device in case of detecting the car networking device comprises one of:

allocating a source MAC address and/or an opposite-end MAC address for the Internet of vehicles, and configuring the effective use time or the effective sending times of the source MAC address and/or the opposite-end MAC address; and the replacement indication information of the source MAC address and/or the opposite terminal MAC address after the effective use time or the effective sending times of the source MAC address and/or the opposite terminal MAC address are exceeded.

15. The message transmission method according to claim 11 or 14, wherein the replacement indication information of the source MAC address and/or the peer MAC address comprises one of the following:

16. A transmission device of messages is characterized in that the transmission device is applied to a vehicle networking device and comprises:

a processing module, configured to generate an indication field related to the source MAC address and an opposite-end MAC address, where the indication field includes the source MAC address and the opposite-end MAC address;

a first sending module, configured to send a unicast/multicast message carrying the indication field;

the first determining module includes:

and the second determining submodule is used for receiving a source MAC address and/or an opposite-end MAC address which are sent by the management node and used for the vehicle networking equipment to send the unicast/multicast message, and correspondingly determining the source MAC address and/or the opposite-end MAC address as the source MAC address and/or the opposite-end MAC address used for sending the unicast/multicast message.

17. An apparatus for transmitting a message, applied to a management node, includes:

the second determining module is used for determining a source MAC address and/or an opposite-end MAC address, and the source MAC address and the opposite-end MAC address are used for the vehicle networking equipment to send unicast/multicast messages;

the second sending module is used for sending the source MAC address and/or the opposite-end MAC address to the vehicle networking equipment, and the vehicle networking equipment contains the source MAC address and the opposite-end MAC address in an indication field;

the second determining module includes:

18. A vehicle networking device comprising: transceiver, memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the transmission method of a message according to any one of claims 1 to 9 when executing the computer program.

19. A management node, comprising: transceiver, memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method for transmitting a message according to any of claims 10 to 15 when executing the computer program.

20. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method for transmitting a message according to any one of claims 1 to 9 or the steps of the method for transmitting a message according to any one of claims 10 to 15.