CN111132073B - Multicast communication link layer identifier updating method, device and terminal equipment - Google Patents
Multicast communication link layer identifier updating method, device and terminal equipment Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/08—User group management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
Abstract
The embodiment of the invention discloses a method, a device and terminal equipment for updating a multicast communication link layer identifier. The method comprises the following steps: when a link layer identifier update of the multicast communication is triggered, the V2X layer generates a new link layer identifier; the new link layer identifier includes a new multicast target link layer identifier; the new multicast target link layer identifier is issued to the access layer. The method, the device and the terminal equipment for updating the multicast communication link layer identifier can update the multicast communication link layer identifier.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a terminal device, and a storage medium for updating a multicast communication link layer identifier.
Background
The internet of vehicles communication (vehicle to everything, V2X) includes various services. Such as basic security class communication, advanced (automatic) driving, formation, sensor expansion, etc. V2X research in 5G systems has just begun, and companies are now tending to support multiple modes of transmission in 5G systems, including unicast, multicast and broadcast. Unicast, as the name implies, is a one-to-one transmission, and multicast is a one-to-many transmission. Wherein multicast is also called multicasting.
Unlike broadcast communication, unicast and multicast communication in V2X are a kind of privately owned communication, that is, only terminals at both ends of a link in unicast can receive mutual data, and multicast communication is only suitable for forwarding and receiving data by terminals in a group. There may be a risk that the radio link identifier is identified by other terminals or third party tracking for long unicast and multicast sessions, i.e. there may be a risk that data is revealed or tracked if the radio link identifier in unicast or multicast is identified by other terminals. In order to be able to guarantee privacy and security of unicast and multicast, a scheme of updating the terminal radio link identifier needs to be designed.
For the update procedure of the unicast communication link layer identifier, as shown in fig. 1. A User Equipment (UE) 1 decides to update a link layer identifier (L2 ID) and sends an update request message containing a new upcoming link layer identifier to the UE 2; UE2 replies to user equipment 1 with a link layer identifier update response message. After receiving the reply message from UE2, UE1 and UE2 begin to forward data using the new link layer identifier.
However, there is currently no method for updating a link layer identifier for multicast communication, and an update scheme for a link layer identifier for multicast communication is under study.
Disclosure of Invention
The embodiment of the invention provides a method, a device, terminal equipment and a storage medium for updating a multicast communication link layer identifier, which can update the multicast communication link layer identifier.
In one aspect, an embodiment of the present invention provides a method for updating a multicast communication link layer identifier, where the method includes:
when a link layer identifier update of the multicast communication is triggered, the V2X layer generates a new link layer identifier; the new link layer identifier includes a new multicast target link layer identifier;
the new multicast target link layer identifier is issued to the access layer.
In another aspect, an embodiment of the present invention provides an apparatus for updating a multicast communication link layer identifier, where the apparatus includes:
a generating module, configured to generate a new link layer identifier by the V2X layer when a link layer identifier update of the multicast communication is triggered; the new link layer identifier includes a new multicast target link layer identifier;
and the issuing module is used for issuing the new multicast target link layer identifier to an access layer.
In still another aspect, an embodiment of the present invention provides a terminal device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor;
the computer program when executed by a processor implements the steps of the multicast communication link layer identifier updating method provided by the embodiment of the present invention.
In yet another aspect, an embodiment of the present invention provides a computer readable storage medium having a computer program stored thereon, which when executed by a processor implements the steps of the multicast communication link layer identifier updating method provided by the embodiment of the present invention.
According to the method, the device, the terminal equipment and the storage medium for updating the multicast communication link layer identifier, when the update of the multicast communication link layer identifier is triggered, the V2X layer generates a new link layer identifier; the new link layer identifier includes a new multicast target link layer identifier; the new multicast target link layer identifier is issued to the access layer. The embodiment of the invention can update the link layer identifier of the multicast communication.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are needed to be used in the embodiments of the present invention will be briefly described, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic diagram of an update procedure of unicast communication L2ID;
fig. 2 is a schematic flow chart of a multicast communication L2ID updating method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a first procedure for updating a multicast target L2ID according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a second procedure for updating a multicast target L2ID according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a third procedure of multicast target L2ID update according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a multicast communication L2ID updating device according to an embodiment of the present invention;
fig. 7 shows a schematic hardware structure of a terminal device according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely configured to illustrate the invention and are not configured to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
Fig. 2 is a schematic flow chart of a multicast communication L2ID updating method according to an embodiment of the present invention. The multicast communication L2ID updating method may include:
s201: when a link layer identifier L2ID update of the multicast communication is triggered, the V2X layer generates a new L2ID; the new L2ID includes a new multicast target L2ID.
S202: and issuing the new multicast target L2ID to an access layer.
Since multicasting (also known as multicasting) is an application layer management implementation, in order to prevent L2ID from being tracked or identified by other terminals or third parties in multicast communication, it is necessary for the application layer (Application Layer) to trigger update of Group (Group) ID or instruct the V2X layer to update L2ID.
The V2X layer generates a new L2ID including a new multicast target link layer identifier (multicast Destination L ID) after receiving a Group ID or an update instruction for the L2ID transmitted by the application layer.
In one embodiment of the invention, the new L2ID may also include the source L2ID.
Wherein the Destination L2ID is a link layer identification for identifying a device or a group of devices receiving the proximity service communication frame.
It will be appreciated that the V2X layer generates a new L2ID based on the Group ID, requiring an ID conversion. Based on this, embodiments of the present invention may generate a new L2ID using an ID conversion algorithm and a Group ID.
In one embodiment of the invention, the input to the ID conversion algorithm is the Group ID and the output value of the ID conversion algorithm includes the new multicast Destination L ID.
The embodiment of the present invention is not limited to the ID conversion algorithm used, and any available ID conversion algorithm may be applied to the embodiment of the present invention.
In one embodiment of the invention, the ID conversion algorithm utilized by the V2X layer may be configured for the application layer at the time of multicast communication setup and issued to the V2X layer.
Fig. 3 is a schematic diagram of a first procedure for updating a multicast target L2ID according to an embodiment of the present invention.
In the configuration stage when multicast communication is established, an application layer configures an ID conversion algorithm to a V2X layer.
And updating the Group ID by the application layer corresponding to each of the sender UE and the receiver UE, and transmitting the new Group ID to the V2X layer corresponding to each of the sender UE and the receiver UE.
Generating a new L2ID by the V2X layers corresponding to the sender UE and the receiver UE respectively by using an ID conversion algorithm and a new Group ID, wherein the new L2ID comprises a new multicast Destination L ID; and issues the new multicast Destination L ID to the Access (AS) layer, which replaces the current multicast Destination L ID with the new multicast Destination L ID.
It should be noted that, the receiving UE needs to receive the remaining packets without changing the L2ID based on the old L2ID.
It is also understood that the V2X layer needs to utilize an L2ID update algorithm to generate an L2ID based on an update indication for the L2ID.
The embodiment of the invention is not limited to the utilized L2ID update algorithm, and any available L2ID update algorithm may be applied to the embodiment of the invention.
In one embodiment of the present invention, the L2ID update algorithm utilized by the V2X layer may be configured for the application layer at the time of multicast communication setup and issued to the V2X layer.
Fig. 4 is a schematic diagram of a second procedure for multicast target L2ID update according to an embodiment of the present invention.
In the configuration stage when multicast communication is established, the application layer configures an L2ID updating algorithm to the V2X layer.
The application layers corresponding to the sender UE and the receiver UE respectively issue update indications for the L2ID.
After receiving the update instruction, the V2X layer corresponding to the sender UE and the receiver UE respectively takes the current Group ID and the current multicast Destination L ID as inputs of an L2ID update algorithm, and the L2ID update algorithm outputs a new L2ID, wherein the new L2ID comprises a new multicast Destination L ID; and issues the new multicast Destination L ID to the AS layer, which replaces the current multicast Destination L ID with the new multicast Destination L ID.
It should be noted that, the receiving UE needs to receive the remaining packets without changing the L2ID based on the old L2ID.
In one embodiment of the present invention, a timer for L2ID update may also be provided, and when the timer expires, the L2ID is updated. Based on this, the meeting the L2ID update condition provided by the embodiment of the present invention may further include: the timer for the L2ID update expires.
In one embodiment of the invention, the timer for the L2ID utilized by the V2X layer may be configured for the application layer at the time of multicast communication setup and sent to the V2X layer.
Fig. 5 is a schematic diagram illustrating a third procedure for updating a multicast target L2ID according to an embodiment of the present invention.
In the configuration phase when multicast communication is established, the application layer configures a timer for L2ID update and an L2ID update algorithm to the V2X layer.
When the timer for the L2ID update expires, the V2X layer takes the current Group ID and the current multicast Destination L ID as inputs to the L2ID update algorithm, which outputs a new L2ID, wherein the new L2ID includes a new multicast Destination L ID; and issues the new multicast Destination L ID to the AS layer, which replaces the current multicast Destination L ID with the new multicast Destination L ID.
It should be noted that, the receiving UE needs to receive the remaining packets without changing the L2ID based on the old L2ID.
In one embodiment of the invention, the inputs to the L2ID update algorithm are the current Group ID and the current multicast Destination L ID, and the output value of the L2ID update algorithm includes the new multicast Destination L ID.
According to the multicast communication L2ID updating method provided by the embodiment of the invention, the multicast communication L2ID can be updated, so that the data in the multicast communication can be effectively prevented from being tracked or identified by other terminals or third parties, the privacy of the user can be protected, and the data security can be improved.
Corresponding to the method embodiment, the embodiment of the invention also provides a multicast communication L2ID updating device. As shown in fig. 6, fig. 6 is a schematic structural diagram of a multicast communication L2ID updating device according to an embodiment of the present invention. The multicast communication L2ID updating means may include:
a generating module 601, configured to generate a new L2ID by the V2X layer when a link layer identifier L2ID update of the multicast communication is triggered; the new L2ID includes a new multicast target L2ID;
the issuing module 602 is configured to issue a new multicast target L2ID to an access layer.
In one embodiment of the invention, the L2ID update for multicast communications is triggered, comprising:
a group identifier sent by the application layer is received.
In one embodiment of the present invention, the generating module 601 may specifically be configured to:
generating a new L2ID by using an ID conversion algorithm and a group identifier; wherein the input of the ID conversion algorithm is a group identifier, and the output value of the ID conversion algorithm includes the new multicast target L2ID.
In one embodiment of the invention, the ID conversion algorithm is configured by the application layer when multicast communication is established.
In one embodiment of the invention, the L2ID update for multicast communications is triggered, comprising:
and receiving an L2ID update instruction sent by an application layer.
In one embodiment of the invention, the L2ID update for multicast communications is triggered, comprising:
the timer for the L2ID update expires.
In one embodiment of the invention, the timer is configured by the application layer when multicast communication is established.
In one embodiment of the present invention, the generating module 601 may specifically be configured to:
generating a new L2ID by using an L2ID updating algorithm; wherein, the input of the L2ID updating algorithm is the current group identifier and the current multicast target L2ID, and the output value of the L2ID updating algorithm comprises the new multicast target L2ID.
In one embodiment of the invention, the L2ID update algorithm is configured by the application layer when multicast communication is established.
In one embodiment of the present invention, the multicast communication L2ID updating apparatus provided in the embodiment of the present invention may further include:
and the replacing module is used for the AS layer to replace the current multicast target L2ID into a new multicast target L2ID.
According to the multicast communication L2ID updating device provided by the embodiment of the invention, the multicast communication L2ID can be updated, so that the data in the multicast communication can be effectively prevented from being tracked or identified by other terminals or third parties, the privacy of users can be protected, and the data security can be improved.
Fig. 7 shows a schematic hardware structure of a terminal device according to an embodiment of the present invention. The terminal device 700 includes, but is not limited to: radio frequency unit 701, network module 702, audio output unit 703, input unit 704, sensor 705, display unit 706, user input unit 707, interface unit 708, memory 709, processor 710, and power supply 711. It will be appreciated by those skilled in the art that the terminal device structure shown in fig. 7 does not constitute a limitation of the terminal device, and the terminal device may comprise more or less components than shown, or may combine certain components, or may have a different arrangement of components. In the embodiment of the invention, the terminal equipment comprises, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer and the like.
A processor 710 for generating a new L2ID when a link layer identifier L2ID update of the multicast communication is triggered; the new L2ID includes a new multicast target L2ID.
The embodiment of the invention can update the link layer identifier of the multicast communication.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 701 may be used for receiving and transmitting signals during the process of receiving and transmitting information or communication, specifically, receiving downlink data from a base station, and then processing the received downlink data by the processor 710; and, the uplink data is transmitted to the base station. Typically, the radio unit 701 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio unit 701 may also communicate with networks and other devices through a wireless communication system.
The terminal device provides wireless broadband internet access to the user via the network module 702, such as helping the user to send and receive e-mail, browse web pages, access streaming media, etc.
The audio output unit 703 may convert audio data received by the radio frequency unit 701 or the network module 702 or stored in the memory 709 into an audio signal and output as sound. Also, the audio output unit 703 may also provide audio output (e.g., a call signal reception sound, a message reception sound, etc.) related to a specific function performed by the terminal device 700. The audio output unit 703 includes a speaker, a buzzer, a receiver, and the like.
The input unit 704 is used for receiving an audio or video signal. The input unit 704 may include a graphics processor (Graphics Processing Unit, GPU) 7041 and a microphone 7042, the graphics processor 7041 processing image data of still pictures or video obtained by an image capturing apparatus (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 706. The image frames processed by the graphics processor 7041 may be stored in memory 709 (or other storage medium) or transmitted via the radio unit 701 or the network module 702. The microphone 7042 can receive sound, and can process such sound into audio data. The processed audio data may be converted into a format output that can be transmitted to the mobile communication base station via the radio frequency unit 701 in the case of a telephone call mode.
The terminal device 700 further comprises at least one sensor 705, such as a light sensor, a motion sensor and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 7061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 7061 and/or the backlight when the terminal device 700 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and direction when the accelerometer sensor is stationary, and can be used for recognizing the gesture (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking) and the like of the terminal equipment; the sensor 705 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., and will not be described again here.
The display unit 706 is used to display information input by a user or information provided to the user. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 707 is operable to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the terminal device. Specifically, the user input unit 707 includes a touch panel 7071 and other input devices 7072. The touch panel 7071, also referred to as a touch screen, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on the touch panel 7071 or thereabout using any suitable object or accessory such as a finger, stylus, etc.). The touch panel 7071 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch azimuth of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends the touch point coordinates to the processor 710, and receives and executes commands sent from the processor 710. In addition, the touch panel 7071 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 707 may include other input devices 7072 in addition to the touch panel 7071. In particular, other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.
Further, the touch panel 7071 may be overlaid on the display panel 7061, and when the touch panel 7071 detects a touch operation thereon or nearby, the touch operation is transmitted to the processor 710 to determine a type of a touch event, and then the processor 710 provides a corresponding visual output on the display panel 7061 according to the type of the touch event. Although in fig. X, the touch panel 7071 and the display panel 7061 are two independent components to implement the input and output functions of the terminal device, in some embodiments, the touch panel 7071 and the display panel 7061 may be integrated to implement the input and output functions of the terminal device, which is not limited herein.
The interface unit 708 is an interface to which an external device is connected to the terminal apparatus 700. For example, the external devices may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 708 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal apparatus 700 or may be used to transmit data between the terminal apparatus 700 and an external device.
The memory 709 may be used to store software programs as well as various data. The memory 709 may mainly include a storage program area that may store an operating system, application programs required for at least one function (such as a sound playing function, an image playing function, etc.), and a storage data area; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, memory 709 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 710 is a control center of the terminal device, connects various parts of the entire terminal device using various interfaces and lines, and performs various functions of the terminal device and processes data by running or executing software programs and/or modules stored in the memory 709 and calling data stored in the memory 709, thereby performing overall monitoring of the terminal device. Processor 710 may include one or more processing units; preferably, the processor 710 may integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., with a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 710.
The terminal device 700 may further include a power supply 711 (e.g., a battery) for supplying power to the respective components, and preferably, the power supply 711 may be logically connected to the processor 710 through a power management system, so as to perform functions of managing charging, discharging, and power consumption management through the power management system.
In addition, the terminal device 700 includes some functional modules, which are not shown, and will not be described herein.
Preferably, the embodiment of the present invention further provides a terminal device, which includes a processor 710, a memory 709, and a computer program stored in the memory 709 and capable of running on the processor 710, where the computer program when executed by the processor 710 implements each process of the above embodiment of the multicast communication link layer identifier updating method, and can achieve the same technical effects, and for avoiding repetition, a detailed description is omitted herein.
Embodiments of the present invention also provide a computer readable storage medium having computer program instructions stored thereon; when the computer program instruction is executed by the processor, the processes of the multicast communication L2ID updating method embodiment provided by the embodiment of the present invention are implemented, and the same technical effects can be achieved, so that repetition is avoided, and no further description is provided here. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (12)
1. A method for updating a multicast communication link layer identifier, the method comprising:
when a link layer identifier update of the multicast communication is triggered, the V2X layer generates a new link layer identifier; the new link layer identifier comprises a new multicast target link layer identifier;
issuing the new multicast target link layer identifier to an access layer;
the link layer identifier update of the multicast communication is triggered, comprising:
receiving a group identifier sent by an application layer; or alternatively, the first and second heat exchangers may be,
the timer for the link layer identifier update expires;
the generating a new link layer identifier includes:
generating a new link layer identifier by using a link layer identifier updating algorithm; the input of the link layer identifier updating algorithm is a current group identifier and a current multicast target link layer identifier, and the output value of the link layer identifier updating algorithm comprises the new multicast target link layer identifier.
2. The method of claim 1, wherein the link layer identifier update of the multicast communication is triggered, comprising:
and receiving a link layer identifier update indication sent by an application layer.
3. The method of claim 1, wherein the timer is configured by an application layer at the time of multicast communication establishment.
4. The method of claim 1, wherein the link layer identifier update algorithm is configured by an application layer when multicast communication is established.
5. The method according to claim 1, wherein the method further comprises:
the access layer replaces the current multicast target link layer identifier with the new multicast target link layer identifier.
6. A multicast communication link layer identifier updating apparatus, the apparatus comprising:
a generating module, configured to generate a new link layer identifier by the V2X layer when a link layer identifier update of the multicast communication is triggered; the new link layer identifier comprises a new multicast target link layer identifier;
a transmitting module, configured to transmit the new multicast target link layer identifier to an access layer;
the link layer identifier update of the multicast communication is triggered, comprising:
receiving a group identifier sent by an application layer; or alternatively, the first and second heat exchangers may be,
the timer for the link layer identifier update expires;
the generating module is specifically configured to:
generating a new link layer identifier by using a link layer identifier updating algorithm; the input of the link layer identifier updating algorithm is a current group identifier and a current multicast target link layer identifier, and the output value of the link layer identifier updating algorithm comprises the new multicast target link layer identifier.
7. The apparatus of claim 6, wherein the link layer identifier update of the multicast communication is triggered, comprising:
and receiving a link layer identifier update indication sent by an application layer.
8. The apparatus of claim 6, wherein the timer is configured by an application layer at a time of multicast communication establishment.
9. The apparatus of claim 6, wherein the link layer identifier update algorithm is configured by an application layer when multicast communication is established.
10. The apparatus of claim 6, wherein the apparatus further comprises:
and the replacing module is used for replacing the current multicast target link layer identifier by the access layer to obtain the new multicast target link layer identifier.
11. A terminal device, characterized in that the terminal device comprises: a memory, a processor, and a computer program stored on the memory and executable on the processor;
the computer program, when executed by the processor, implements the steps of the multicast communication link layer identifier updating method of any of claims 1 to 5.
12. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the multicast communication link layer identifier updating method according to any of claims 1 to 5.
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