CN111328027B

CN111328027B - Message transmission method

Info

Publication number: CN111328027B
Application number: CN201811541525.0A
Authority: CN
Inventors: 苏琪; 徐长春; 蔺波; 王岩; 于峰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-12-17
Filing date: 2018-12-17
Publication date: 2021-12-14
Anticipated expiration: 2038-12-17
Also published as: CN111328027A; WO2020125419A1

Abstract

The application discloses a message transmission method. The message transmission method comprises the following steps: the wireless access network equipment receives a first message, determines first terminal equipment according to the set identification of the first message, then sends position information to the first terminal equipment, and sends a second message to the first terminal equipment through the air interface resource. Therefore, in the application, the corresponding relationship between the set identifier and the transmission channel identifier is maintained in the wireless access network device, so that the terminal device for receiving the message to be broadcasted is determined according to the set identifier contained in the message to be broadcasted. Furthermore, the radio access network device transmits the message to be broadcasted only by using one air interface resource. The operation mode ensures that no matter the number of the terminal equipment receiving the message, one air interface resource is occupied, thereby saving the air interface resource.

Description

Message transmission method

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method for transmitting a packet.

Background

A Virtual Local Area Network (VLAN) is a logical network based on a physical network. For example, network management personnel can configure entity devices belonging to the same function or the same department in a physical network into a logical set. The logical set is defined as a VLAN.

Wherein a VLAN can be used as a broadcast domain. The message may be unicast to a certain physical device in a VLAN through a forwarding device (e.g., a switch) or may be broadcast to all physical devices under a VLAN. In a mobile cellular network, a message needs to be carried on an air interface resource, which is, for example, a Resource Block (RB), and sent. Generally, corresponding to different entity devices, the network needs to configure air interface resources respectively, and each air interface resource is used for bearing a message sent to the corresponding entity device. Therefore, a plurality of air interface resources may be occupied when the message is sent in a broadcast manner.

Disclosure of Invention

The application provides a message transmission method, which solves the problem that the existing broadcast mode is adopted to send messages and occupies more air interface resources.

In a first aspect, the present application provides a method for transmitting a packet, where the method includes: the method comprises the steps that a wireless access network device receives a first message, wherein the first message comprises a set identifier; the wireless access network equipment determines first terminal equipment according to the set identification, wherein the first terminal equipment belongs to the set indicated by the set identification; the wireless access network equipment sends position information to the first terminal equipment, wherein the position information is used for indicating air interface resources; and the wireless access network equipment sends a second message to the first terminal equipment through the air interface resource, wherein the second message is obtained according to the first message.

In the application, the radio access network device can acquire the set identifier and can determine the terminal device belonging to the set indicated by the set identifier according to the set identifier. And then, the radio access network equipment allocates an air interface resource for the message and acquires the position information of the air interface resource. Then, the radio access network device sends the location information to the terminal devices belonging to the set, so that the terminal devices belonging to the set can all acquire the location of the air interface resource. And then, the radio access network equipment sends a message to the terminal equipment belonging to the set through the air interface resource. And the terminal equipment belonging to the set can acquire the message from the air interface resource. Therefore, the broadcasting mode can occupy an air interface resource no matter the number of the terminal devices receiving the message, thereby saving the air interface resource.

In a possible implementation manner, the radio access network device determines a second terminal device according to the set identifier, where the second terminal device belongs to the set indicated by the set identifier; the wireless access network equipment sends the position information to the second terminal equipment; and the wireless access network equipment sends the second message to the second terminal equipment through the air interface resource. The second terminal device and the first terminal device are both terminal devices for receiving broadcast messages. In this application, the radio access network device further sends an air interface resource including the second packet to the second terminal device. Therefore, no matter the number of the terminal devices receiving the message, one air interface resource is occupied, so that the air interface resource can be saved.

In a possible implementation manner, the determining, by the radio access network device, the first terminal device according to the set identifier includes: and the radio access network equipment determines the corresponding relation between the set identifier and the transmission channel identifier in the first relation, wherein the transmission channel indicated by the transmission channel identifier is used for the radio access network equipment to send the second message to the first terminal equipment.

Wherein the transmission channel identifier indicates the transmission channel of the terminal device in one set. That is, the transmission channel id corresponds to the set id one to one. And the transmission channel identifier corresponds to the terminal device. Based on this, with the implementation, the radio access network device can determine the transmission channel identifier according to the correspondence between the set identifier and the transmission channel identifier, and then the transmission channel indicated by the determined transmission channel identifier is connected to the first terminal device.

In a possible implementation manner, before the determining, by the radio access network device, that the first relationship includes the correspondence between the set identifier and the transmission channel identifier, the method further includes: the radio access network device receives the first relationship from a first network element.

The corresponding relation between the set identification related to the terminal equipment and the transmission channel identification is maintained in the wireless access network equipment, so that after a downlink message is received, the set to which the terminal equipment receiving the downlink message belongs can be determined. Furthermore, the radio access network equipment can make a transmission strategy of the message.

In one possible implementation, the receiving, by the radio access network device, the first relationship from a first network element includes: the radio access network equipment receives the first relation from a network element of a core network; or, the radio access network device receives the first relationship from a source radio access network device, and the source radio access network device connects to the first terminal device before the radio access network device connects to the first terminal device.

In one embodiment, the correspondence between the set identifier and the transmission channel identifier is established by a network element of the control plane at a stage when the terminal device establishes a session with the control plane. In another embodiment, if the service of the source radio access network device is switched to the target radio access network device, the information about the terminal device maintained by the source radio access network device should be sent to the target radio access network device, so that the target radio access network device receives the service of the corresponding terminal device. Therefore, in this embodiment, the radio access network device obtains the correspondence between the set identifier and the transmission channel identifier from the source radio access network device.

In a possible implementation manner, before the radio access network device sends the second packet to the first terminal device through the air interface resource, the method further includes: the wireless access network equipment determines that the set identifier corresponds to a first key, and the wireless access network equipment sends the first key to the first terminal equipment; or, the radio access network device determines that the set identifier corresponds to first scrambling information, and the radio access network device sends the first scrambling information to the first terminal device; or, the radio access network device determines that the set identifier corresponds to a first key, and the set identifier corresponds to first scrambling information, and the radio access network device sends the first key and the first scrambling information to the first terminal device.

In a possible implementation manner, before the radio access network device sends the second packet to the first terminal device through the air interface resource, the method further includes: the wireless access network equipment determines that the set identifier has no corresponding key, configures a second key corresponding to the set identifier, and sends the second key to the first terminal equipment; or, the radio access network device determines that the set identifier does not have corresponding scrambling information, the radio access network device configures second scrambling information corresponding to the set identifier, and the radio access network device sends the second scrambling information to the first terminal device; or, the radio access network device determines that the set identifier does not have a corresponding key and the set identifier does not have corresponding scrambling information, the radio access network device configures a second key corresponding to the set identifier and second scrambling information corresponding to the set identifier, and the radio access network device sends the second key and the second scrambling information to the first terminal device.

In order to improve the security of the message to be broadcasted, the radio access network device may set a key corresponding to each set, where the key is used to encrypt the message before sending the message to the set in a broadcast sending manner. For example, the radio access network device receives a first relationship, and if no corresponding key is set for a set identifier in the first relationship, the radio access network device sets a key for each set identifier in the first relationship. Wherein, the keys corresponding to the set identifier of the first relationship are different from each other. Similarly, the radio access network device may set scrambling information corresponding to each set identifier, where the scrambling information is used to scramble the location information of the air interface resource and the packet. Wherein, the scrambling information corresponding to the set identifier of the first relation is different from each other. Of course, in still other embodiments, the wireless access network device may also set the key and scrambling information for each set identifier.

In a possible implementation manner, the sending, by the radio access network device, the location information to the first terminal device includes: the wireless access network equipment sends the position identification of the air interface resource to the first terminal equipment; or, the radio access network device uses the first scrambling information to scramble the location identifier of the air interface resource; and the radio access network equipment sends the scrambled position identification to the first terminal equipment. The location information is used for indicating air interface resources. The air interface resource is used for bearing and transmitting the message. And the radio access network equipment can simultaneously determine the positions of the air interface resources when allocating the air interface resources. In addition, in an embodiment of the present application, the radio access network device may directly send the location identifier of the air interface resource to the first terminal device. In another embodiment, the radio access network device may scramble the location identifier, and then send the scrambled location identifier to the first terminal device, so as to improve the security of the location information and further improve the security of the broadcast packet.

In a possible implementation manner, the sending, by the radio access network device, the second packet to the first terminal device through the air interface resource includes: the wireless access network equipment sends the first message to the first terminal equipment; or, the radio access network device encrypts the first message by using the first key; the wireless access network equipment sends the encrypted first message to the first terminal equipment; or, the radio access network device uses the first scrambling information to scramble the first message; the wireless access network equipment sends the scrambled first message to the first terminal equipment; or, the radio access network device encrypts the first message by using the first key; the wireless access network equipment scrambles the encrypted first message by using the first scrambling information; and the wireless access network equipment sends the scrambled and encrypted first message to the first terminal equipment.

In this application, the radio access network device may directly send the first message to the first terminal device through the air interface resource. However, in order to improve the security of the message, in an embodiment, the radio access network device may encrypt the first message to obtain the second message. And then, the radio access network equipment carries the second message in the air interface resource and sends the second message to the first terminal equipment. In another embodiment, the radio access network device may scramble the first packet to obtain the second packet. And then, the radio access network equipment carries the second message in the air interface resource and sends the second message to the first terminal equipment. In another embodiment, the radio access network device encrypts the packet by using the key, and then the radio access network device scrambles the encrypted packet by using the scrambling information to obtain the second packet. And then, the radio access network equipment carries the second message in the air interface resource and sends the second message to the first terminal equipment.

In a second aspect, the present application provides a packet transmission method, where the method includes: the terminal equipment receives the position information from the wireless access network equipment; the terminal device determines that the position information is first position information or second position information, the first position information indicates a first air interface resource used for transmitting messages to all terminal devices in a target set, the second position information indicates a second air interface resource used for transmitting messages only to the terminal devices, and the target set indicates a set to which the terminal devices belong; the terminal equipment receives a second message from the wireless access network equipment through the first air interface resource or the second air interface resource; and the terminal equipment acquires the first message according to the second message.

In actual operation, the first terminal device may receive a message sent by broadcasting or may receive a message sent by unicasting. Based on this, in this embodiment, the radio access network device may set two types of air interface resources, where the first type of air interface resource is used to send a broadcast-sent message, and the second type of air interface resource is used to send a broadcast-sent message. The two types of air interface resources can be distinguished by location information. For example, the air interface resource of the first type corresponds to the first location information, and the air interface resource of the second type corresponds to the second location information. By adopting the implementation mode, the first terminal equipment can simultaneously acquire the messages transmitted by adopting different transmission modes from the two air interface resources, so that the compatibility is improved.

In a possible implementation manner, the determining, by the terminal device, that the location information is the first location information or the second location information includes: the terminal equipment uses each scrambling information in at least two scrambling information to descramble the position information; in response to descrambling using first scrambling information being successful, the terminal device determining that the location information is the first location information, the first scrambling information corresponding to a set identification of a set to which the first terminal device belongs; in response to descrambling using second scrambling information being successful, the terminal device determines that the location information is the second location information, the second scrambling information corresponding to the first terminal device.

In a possible implementation manner, the acquiring, by the terminal device, the first packet according to the second packet includes: the terminal equipment reads the second message as the first message; or the terminal device uses the first scrambling information to descramble the second message to obtain the first message; or the terminal device uses the first scrambling information to descramble the second message; and the terminal equipment decrypts the descrambled message by using a first key to obtain the first message, wherein the first key corresponds to the set identifier.

In order to improve the security of the message, the radio access network device sends the message through four implementation modes, wherein the three implementation modes are three different encryption modes respectively. Correspondingly, the terminal equipment acquires the corresponding message through different implementation modes.

In a third aspect, the present application provides a packet transmission method, where the method includes: a first network element receives request information from a first terminal device, wherein the request information comprises a radio access network device identifier; the first network element sends a first relationship to the radio access network device, where the first relationship includes a correspondence between a first set identifier and a first transmission channel identifier, the first set identifier indicates a first set to which the first terminal device belongs, and a transmission channel indicated by the first transmission channel identifier is used for the radio access network device to transmit a packet with the first terminal device in the first set.

Wherein the network element belongs to a control plane. And in the process of establishing a session between the first terminal equipment and the network element, the network element establishes a corresponding relation between a set identifier and a transmission channel identifier related to the first terminal equipment. In the application, the network element sends the corresponding relationship between the set identifier and the transmission channel identifier to the radio access network device, so that after the radio access network device receives the message, the policy for forwarding the message can be determined according to the set identifier or the transmission channel identifier corresponding to the message.

In a possible implementation manner, before the sending, by the first network element, the first relationship to the radio access network device, the method further includes: the first network element acquires the first set identifier; and the first network element establishes the first transmission channel corresponding to the first set identifier to obtain the first relation. For example, each terminal device in the set occupies transmission channel resources such as partial traffic (bandwidth) of the set, and is used for the corresponding terminal device to transmit the packet in the set. In order to facilitate the maintenance of the correspondence between the terminal device and the transmission channel of the terminal device, a transmission channel identifier is correspondingly set for each transmission channel. And then, the first network element establishes a one-to-one correspondence relationship between the set identifier and the transmission channel identifier corresponding to the first terminal device, so as to obtain the first relationship.

In a possible implementation manner, the obtaining, by the first network element, the first set identifier includes: the first network element acquires the first set identifier from a second network element; or, the first network element obtains the first set identifier from a data network.

In some embodiments, in the process of establishing the set, the first terminal device may write data corresponding to the first terminal device into the second network element, so that the first network element may send and acquire the first set identifier from the second network element. In other embodiments, the second network element may not include the first set identifier. Then said first network element may obtain said first set identification from the data network.

In a possible implementation manner, the method further includes: the first network element receives request information from a second terminal device, wherein the request information comprises a radio access network device identifier; the first network element sends a second relationship to the radio access network device, where the second relationship includes a corresponding relationship between a first set identifier and a second transmission channel identifier, the first set identifier indicates that the second terminal device belongs to the first set, and the transmission channel indicated by the second transmission channel identifier is used for the radio access network device to transmit a packet with the second terminal device in the first set.

In a fourth aspect, the present application provides a packet transmission method, where the method includes: the method comprises the steps that a wireless access network device receives a message from a terminal device, wherein the message comprises a transmission channel identifier, and the transmission channel identifier indicates a transmission channel of the message sent by the terminal device; the wireless access network equipment determines a set identifier corresponding to the transmission channel identifier, and the terminal equipment belongs to a set indicated by the set identifier; and the wireless access network equipment adds the set identification to the message.

By adopting the implementation mode, when the wireless access network equipment receives the message, the forwarding strategy can be formulated according to the set identification and the transmission channel identification, and an information basis is provided for forwarding the message.

In a possible implementation manner, the determining, by the radio access network device, a set identifier corresponding to the transmission channel identifier includes: and the wireless access network equipment determines the corresponding relation between the set identifier and the transmission channel identifier in the first relation.

In a possible implementation manner, before the determining, by the radio access network device, the set identifier corresponding to the transmission channel identifier, the method includes: the radio access network device receives the first relationship from a first network element.

In one possible implementation, the receiving, by the radio access network device, the first relationship from a first network element includes: the radio access network equipment receives the first relation from a network element of a core network; or, the radio access network device receives the first relationship from a source radio access network device, and the source radio access network device connects to the terminal device before the radio access network device connects to the terminal device.

In a fifth aspect, the present application provides a packet transmission method, where the method includes: a first network element receives request information from a terminal device, wherein the request information comprises a radio access network device identifier; the first network element sends a first relationship to the radio access network device, where the first relationship includes a correspondence between a set identifier and a transmission channel identifier, the set identifier indicates a set to which the terminal device belongs, and the transmission channel indicated by the transmission channel identifier is used for the radio access network device to transmit a packet with the terminal device in the set.

In a possible implementation manner, before the sending, by the first network element, the first relationship to the radio access network device, the method further includes: the first network element acquires the set identifier; and the first network element establishes the transmission channel corresponding to the set identifier to obtain the first relation.

In a possible implementation manner, the acquiring, by the first network element, the set identifier includes: the first network element acquires the set identifier from a second network element; or, the first network element obtains the set identifier from a data network.

In a sixth aspect, the present application provides a packet transmission method, where the method includes: receiving a message by wireless access network equipment, wherein the message contains a first set identifier; the wireless access network equipment determines a transmission channel identifier corresponding to the message, and the transmission channel identifier indicates a transmission channel of the wireless access network equipment for transmitting the message; the wireless access network equipment determines a second set identifier according to the transmission channel identifier; and in response to the first set identifier and the second set identifier being the same, the radio access network device sends the message to a terminal device through the transmission channel.

Therefore, by adopting the realization mode, the wireless access network equipment can avoid the terminal equipment outside the target set for sending the downlink message to be unicast before the downlink message is unicast.

In a possible implementation manner, the determining, by the radio access network device, the second set identifier according to the transmission channel identifier includes: and the wireless access network equipment determines the corresponding relation between the second set identifier and the transmission channel identifier in the first relation.

In a possible implementation manner, before the determining, by the radio access network device, the second set identifier according to the transmission channel identifier, the method includes: the radio access network device receives the first relationship from a first network element.

In a seventh aspect, the present application provides a packet transmission method, where the method includes: a first network element receives request information from a terminal device, wherein the request information comprises a radio access network device identifier; the first network element sends a first relationship to the radio access network device, where the first relationship includes a correspondence between a set identifier and a transmission channel identifier, the set identifier indicates a set to which the terminal device belongs, and the transmission channel indicated by the transmission channel identifier is used for the radio access network device to transmit a packet with the terminal device in the set.

In an eighth aspect, the present application provides a radio access network device, where the radio access network device has a function of implementing the behavior of the radio access network device in the foregoing method. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In one possible design, the structure of the radio access network device includes a processor and a transceiver, and the processor is configured to process the radio access network device to perform corresponding functions in the method. The transceiver is used for realizing the communication among the wireless access network equipment, the terminal equipment and the network element. The radio access network device may also include a memory, coupled to the processor, that retains program instructions and data necessary for the radio access network device.

In a ninth aspect, the present application provides a terminal device, where the terminal device has a function of implementing the behavior of the terminal device in the above method. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In one possible design, the structure of the terminal device includes a processor and a transceiver, and the processor is configured to process the terminal device to perform the corresponding functions in the method. The transceiver is used for realizing the communication between the terminal equipment and the wireless access network equipment. The terminal device may also include a memory, coupled to the processor, that stores program instructions and data necessary for the terminal device.

In a tenth aspect, the present application provides a network element having a function of implementing the behavior of the network element in the above method. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In one possible design, the network element includes a processor and a transceiver, and the processor is configured to process the network element to perform the corresponding functions in the method. The transceiver is used for realizing the communication between the network element and the wireless access network equipment. The network element may further comprise a memory, coupled to the processor, that stores program instructions and data necessary for the network element.

In an eleventh aspect, the present application provides a computer-readable storage medium having stored therein instructions, which when run on a computer, cause the computer to perform any of the possible methods described above.

In the application, the radio access network device maintains the corresponding relationship between the set identifier and the transmission channel identifier, and the message to be broadcasted includes the set identifier. Based on this, after the radio access network device receives the message to be broadcasted, the terminal device receiving the message can be determined according to the set identifier. Then, the radio access network device sends location information to the terminal device, where the location information indicates an air interface resource for transmitting the packet. And then, the radio access network equipment sends the message to the terminal equipment through the air interface resource. Therefore, the radio access network equipment only uses one air interface resource to transmit the message to be broadcasted. The operation mode ensures that no matter the number of the terminal equipment receiving the message, one air interface resource is occupied, thereby saving the air interface resource.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic block diagram of an embodiment of a mobile network architecture of the present application;

FIG. 2 is a flow chart of a method of an embodiment of the present application message transmission method;

fig. 3 is a signaling interaction diagram of an embodiment of the message transmission method of the present application;

fig. 4 is a schematic view of a scenario of an embodiment of a radio access network device, a terminal device, and a set mapping relationship according to the present application;

FIG. 5 is a block diagram of another embodiment of a mobile network architecture of the present application;

FIG. 6 is a signaling interaction diagram of one embodiment of the present application for establishing a PDU session;

fig. 7 is a signaling interaction diagram of an embodiment of an uplink packet transmission method according to the present application;

fig. 8 is a signaling interaction diagram of an embodiment of a unicast method for a downlink packet in the present application;

fig. 9 is a signaling interaction diagram of an embodiment of a method for broadcasting a downlink packet according to the present application;

fig. 10 is a signaling interaction diagram of a first embodiment of a handover method of RAN according to the present application;

fig. 11 is a signaling interaction diagram of a second embodiment of a handover method of RAN according to the present application;

fig. 12A is a schematic structural diagram of a first embodiment of a radio access network device according to the present application;

fig. 12B is a schematic structural diagram of a second embodiment of a radio access network device according to the present application;

fig. 13A is a schematic structural diagram of a first embodiment of a terminal device according to the present application;

fig. 13B is a schematic structural diagram of a second embodiment of the terminal device of the present application;

figure 14A is a schematic structural diagram of a first embodiment of a network element of the present application;

fig. 14B is a schematic structural diagram of a second embodiment of a network element of the present application.

Detailed Description

It should be understood that although the terms first, second, etc. may be used in the following embodiments to describe a class of objects, the objects should not be limited by these terms. These terms are only used to distinguish between particular objects of that class of objects. For example, the terms first, second, etc. may be used in the following embodiments to describe the terminal device, but the terminal device should not be limited to these terms. These terms are only used to distinguish the different terminal devices. The following embodiments may adopt the terms first, second, etc. to describe other class objects in the same way, and are not described herein again.

The application is applied to a physical network which supports a logical set and a broadcast transmission mode. The physical network is for example a mobile network (mobile network).

As shown in fig. 1, in one possible embodiment of the present application, a mobile network architecture 10 includes a terminal device 11, a Radio Access Network (RAN) device 12, a Control Plane (CP) network element 13, and a Data Network (DN) 14. In some embodiments, the mobile network architecture 10 may further include a User Plane Function (UPF) network element 15.

The terminal device 11 involved in the present system is not limited to a 5G network, and includes: the system comprises a mobile phone, an internet of things device, an intelligent household device, an industrial control device, a vehicle device and the like. The terminal device may also be referred to as a User Equipment (UE), a mobile station (mobile station), a remote station (remote station), a remote terminal (remote terminal), an access terminal (access terminal), a terminal device (user terminal), and a terminal agent (user agent), which are not limited herein. The terminal device may be an automobile in vehicle-to-vehicle (V2V) communication, a device in device communication, or the like.

The radio access network device 12 involved in the present system is a means for providing the terminal device 11 with a radio communication function. The RAN equipment 12 may include various forms of base stations, such as: macro base stations, micro base stations (also referred to as small stations), relay stations, access points, etc. In systems using different radio access technologies, names of devices having a base station function may be different, for example, in an LTE system, the device is called an evolved node B (eNB or eNodeB), and in a third generation (3G) system, the device is called a node B (node B). In a new generation system, called gnb (gnnodeb).

The control plane network element 13 involved in the present system may include an access and mobility management function (AMF) network element, a Session Management Function (SMF) network element, a Unified Data Management (UDM) network element, and the like.

The data network 14 involved in the present system may be an operator provided service, an internet access service, or a third party provided service.

The radio access network device 12 is connected to the terminal device 11 and the control plane network element 13, and the control plane network element 13 may perform signaling interaction with the terminal device 11 through the radio access network device 12 by using the control plane network element 13. In an embodiment that the mobile network includes the user plane function network element 15, the radio access network device 12 is connected to the user plane function network element 15, and the user plane function network element 15 is connected to the data network 14 and the control plane network element 13. In an embodiment where the mobile network does not comprise said user plane functionality network element 15, said radio access network device 12 is connected to said data network 14.

In conjunction with the mobile network architecture 10, the radio access network device 12 may receive the uplink packet sent by the terminal device 11, and then forward the uplink packet to the data network 14. The radio access network device 12 may also receive a downlink packet sent by the data network 14, and then send the downlink packet to the terminal device 11. A technician may divide the terminal devices into sets based on the mobile network architecture 10, and then the radio access network device 12 forwards the uplink packet and the downlink packet by using the sets.

It is to be understood that the set may be any logical group that defines physical devices in a network structure. The method of establishing the set may be any method of setting up a network or a group. In some embodiments, the set is a Virtual Local Area Network (VLAN). In other embodiments, the set is a multicast group.

The network elements may be network elements implemented on dedicated hardware, or may be software instances running on dedicated hardware, or may be instances of virtualized functions on a suitable platform, for example, the virtualized platform may be a cloud platform.

In addition, the embodiment of the application can also be applied to other communication technologies facing the future. The network architecture and the service scenario described in this application are for more clearly illustrating the technical solution of this application, and do not constitute a limitation to the technical solution provided in this application, and it can be known by those skilled in the art that the technical solution provided in this application is also applicable to similar technical problems along with the evolution of the network architecture and the appearance of new service scenarios.

Illustratively, in conjunction with the mobile network architecture 10, the present application provides an embodiment of a message transmission method. Referring to fig. 2, a message transmission method 100 (hereinafter referred to as method 100) provided in the present application is applied to a radio access network device 12, and includes the following steps:

step S101, the wireless access network equipment receives a first message. Wherein, the first message contains a set identifier.

Wherein, the first message is a message to be broadcasted.

For example, if the set is a VLAN, the identification of the set is a VLAN identification. If the set is a multicast group, the identification of the set is a multicast address.

Step S102, the wireless access network equipment determines the first terminal equipment according to the set identification.

Wherein the first terminal device belongs to the set indicated by the set identifier.

Step S103, the wireless access network equipment sends the position information to the first terminal equipment.

The location information is used for indicating air interface resources.

Step S104, the wireless access network equipment sends a second message to the first terminal equipment through the air interface resource.

And the second message is obtained according to the first message.

In some embodiments, the second message is the same as the first message. In other embodiments, the second message is an encrypted message of the first message. In other embodiments, the second message is a scrambled message of the first message. In still other embodiments, the second message is a message obtained by encrypting and scrambling the first message.

In this embodiment, the packet includes a set identifier, and the set indicated by the set identifier is a broadcast domain to which the packet is to be broadcast. In this application, the radio access network device 12 can obtain the set identifier, and can determine the terminal device belonging to the set indicated by the set identifier according to the set identifier. The terminal devices belonging to the set indicated by the set identification include the first terminal device. Further, the radio access network device 12 allocates an air interface resource to the packet, and acquires location information of the air interface resource. Then, the radio access network device 12 sends the location information to the terminal devices belonging to the set, so that the terminal devices belonging to the set can all know the location of the air interface resource. Further, the radio access network device 12 sends a message to the terminal device belonging to the set through the air interface resource. The terminal devices belonging to the set can acquire the message from the air interface resource.

Therefore, by adopting the implementation mode, the radio access network equipment only allocates one air interface resource for the message to be broadcasted, and the one or more terminal equipment can share the position information of the air interface resource by sending the position information of the allocated air interface resource to the one or more terminal equipment, so that the one or more terminal equipment can share the air interface resource. The broadcasting mode ensures that no matter the number of the terminal equipment receiving the message, one air interface resource is occupied, thereby saving the air interface resource.

The following describes a specific implementation of the method 100 with reference to an example.

Fig. 3 shows a signaling interaction diagram of a message transmission method. The message transmission method 200 (hereinafter referred to as the method 200) includes the following steps:

step S201, the control plane network element sends the first relationship to the radio access network device.

Wherein, the first relation is the corresponding relation between the set identifier and the transmission channel identifier. The set identifier indicates a set to which the first terminal device belongs, and the transmission channel indicated by the transmission channel identifier is used for the radio access network device to send the second message to the first terminal device.

For example, the method 200 is performed by a radio access network device via aggregation. With reference to the mobile network architecture 10 illustrated in fig. 1, in actual operation, after a technician establishes a set, the radio access network device may perform signaling interaction with a control plane network element to obtain the first relationship.

The following describes the relationship of radio access network devices, terminal devices and sets.

For example, the mobile network shelf 10 illustrated in fig. 1 is obtained by logically equivalent mobile network entities, and in actual use, each component in the mobile network shelf 10 may be a plurality of hardware entities. For example, a mobile network may include a plurality of radio access network devices, each of which may be connected to one or more end device entities. After the sets are established, each terminal device may belong to one or more sets. In order to facilitate maintenance and differentiation of the sets, technicians set up a set identifier for each set. The set identification may be a number, a character, a combination thereof, or the like. As shown in fig. 4, the radio access network device 30 connects the terminal device 31, the terminal device 32, and the terminal device 33. Wherein terminal device 31 belongs to sets 3A and 3B, terminal device 32 belongs to sets 3A and 3C, and terminal device 33 belongs to set 3A. "set 3A", "set 3B", and "set 3C" are set identifications.

In some embodiments, each terminal device in the set occupies transmission channel resources such as partial traffic (bandwidth) of the set, and is used for the corresponding terminal device to transmit the packet in the set. In this embodiment, traffic (bandwidth) and the like occupied by the terminal device are named as a transmission channel. In order to facilitate the maintenance of the correspondence between the terminal device and the transmission channel of the terminal device, a transmission channel identifier is correspondingly set for each transmission channel. If a set corresponds to multiple transmission channel identifiers, the multiple transmission channel identifiers are different from each other. The transmission channel is, for example, a quality of service (QoS) flow, and accordingly, the identification of the QoS flow may be represented as a QoS Flow Identification (QFI).

Illustratively, as shown in table 1, in the embodiment illustrated in fig. 4, the terminal device 31, the terminal device 32, and the terminal device 33 correspond to one transmission channel in the set 3A, respectively. The channel identifier of the transmission channel corresponding to the terminal device 31 in the set 3A is, for example, a 1. The channel identifier of the transmission channel corresponding to the terminal device 32 in the set 3A is, for example, a 2. The channel identifier of the transmission channel corresponding to the terminal device 33 in the set 3A is, for example, a 3. Similarly, the terminal device 31 corresponds to a transmission channel in the set 3B, and the transmission channel identifier of the transmission channel is, for example, B1. The terminal device 32 corresponds to a transmission channel in the set 3C, and the transmission channel identifier of the transmission channel is, for example, C2.

TABLE 1

Correspondingly, from the perspective of the terminal device, a terminal device belongs to several sets, and then the terminal device corresponds to a corresponding number of set identifiers and a corresponding number of transmission channel identifiers, and the transmission identifiers correspond to the set identifiers one to one. With reference to the embodiment illustrated in fig. 4, the correspondence between the terminal device, the set, and the transmission channel identifier is shown in table 2.

In table 2, the terminal device 31 belongs to two sets, and the set identifications of the two sets are set 3A and set 3B, respectively. The transmission channel identifier of the transmission channel corresponding to the terminal device 31 in the set indicated by the set 3A is a1, and the transmission channel identifier of the transmission channel corresponding to the terminal device 31 in the set indicated by the set 3B is B1. Similarly, the terminal device 32 also belongs to two sets, and the set identifications of the two sets are set 3A and set 3C, respectively. The transmission channel identifier of the transmission channel corresponding to the terminal device 32 in the set indicated by the set 3A is a2, and the transmission channel identifier of the transmission channel corresponding to the terminal device 32 in the set indicated by the set 3C is C2. The terminal device 33 belongs to a set, which is identified as set 3A. The transmission channel identification of the transmission channel corresponding to the terminal device 33 in the set indicated by the set 3A is a 3.

TABLE 2

In some embodiments, the correspondence shown in table 1 and table 2 is established and maintained by the control plane network element. See, for example, the description below.

Based on the above description, the first terminal device is, for example, the terminal device 31, and then the first relationship is shown in the two columns corresponding to the terminal device 31 in table 2.

For example, the radio access network device may also receive the second correspondence. And the set identifier and the transmission channel identifier in the second corresponding relation correspond to the second terminal equipment. The second terminal device is, for example, the terminal device 32, and then the second correspondence is shown in the two columns corresponding to the terminal device 32 in table 2.

Further, in some embodiments, the first relationship and the second relationship may be transmitted by the source radio access network device to the radio access network device. The source radio access network device is the radio access network device to which the first terminal device is connected before the handover of the radio access network device. The implementation scenario is described in detail below.

Step S202, the wireless access network device sends the transmission channel identifier in the first relation to the first terminal device.

In some embodiments, the radio access network device may send the transport channel identification in the first relationship to the first terminal device.

In other embodiments, in order to improve the security of the message to be broadcasted, the radio access network device may set a key for each set, where the key is used to encrypt the message before sending the message to the set by broadcast transmission.

Illustratively, the radio access network device receives the first relationship, and if no corresponding key is set in the set identifier in the first relationship, the radio access network device sets a key corresponding to each set identifier in the first relationship. Wherein, the keys corresponding to the set identifier of the first relationship are different from each other. Furthermore, the radio access network device receives a second correspondence, where a part of the set identifier in the second correspondence may be the same as the set identifier in the first correspondence. Based on this, the same set identifier in the second corresponding relationship as that in the first relationship already corresponds to the key, and the radio access network device may set the key only corresponding to the set identifier in the second relationship without the corresponding key. Similarly, before the radio access network device receives the first relationship, it may have received other corresponding relationships, and then the radio access network device may set a corresponding key only for a set without the corresponding key in the first relationship.

Further, in this embodiment, the radio access network device correspondingly sends the transmission channel identifier and the key corresponding to each set identifier in the first relationship to the first terminal device. The key of this embodiment may be a symmetric key or an asymmetric key, which is not limited in this application.

For example, referring to fig. 4 and table 2, the radio access network device receives a corresponding correspondence relationship of the terminal device 31, where the correspondence relationship includes a set 3A and a set 3B. If the corresponding relationship between the terminal device 32 and the corresponding relationship between the terminal device 33 is not received by the radio access network device before the corresponding relationship between the terminal device 31 is received, then the key corresponding to the set 3A and the key corresponding to the set 3B are not stored in the radio access network device, the key corresponding to the radio access network device configuration set 3A is, for example, the key 1, and the key corresponding to the radio access network device configuration set 3B is, for example, the key 2. If the radio access network device has received the corresponding relationship of the terminal device 32 before receiving the corresponding relationship of the terminal device 31, and the corresponding relationship of the terminal device 32 includes the set 3A, then the radio access network device has set the key 1 to the set 3A when receiving the corresponding relationship of the terminal device 32. Further, the radio access network device may configure only the key 2 corresponding to the set 3B. Finally, the radio access network device transmits a1 and key 1 correspondence to the terminal device 31, and a2 and key 2 correspondence to the terminal device 31.

In still other embodiments, in order to improve the security of the message to be broadcasted, the radio access network device may set scrambling information corresponding to each set identifier, where the scrambling information is used to scramble the message and location information of the air interface resource. Then, the radio access network device correspondingly sends the transmission channel identifier and the scrambling information corresponding to each set identifier in the first relationship to the first terminal device. The scrambling information may be scrambling code information having a function similar to a cell radio network temporary identifier (C-RNTI) and a semi-persistent scheduling cell radio network temporary identifier (SPS C-RNTI). For example, the scrambling information of the present application may be referred to as a broadcast cell radio network temporary identifier (BC C-RNTI), where the BC C-RNTI is used to generate a scrambling sequence used to scramble the location information of the air interface resource and the packet.

The way of configuring the scrambling information corresponding to the set identifier by the radio access network device is similar to the way of configuring the key corresponding to the set identifier by the radio access network device. If the set identifier is configured with the corresponding scrambling information, the wireless access network equipment does not configure the scrambling information for the set identifier any more; if the set identifier is not configured with the scrambling information, the wireless access network equipment configures the scrambling information for the set identifier. And, the scrambling information corresponding to the set identifier of the first relation is different from each other.

In still other embodiments, the radio access network device may set a key and scrambling information for each set identifier, and then, the radio access network device correspondingly transmits the transport channel identifier corresponding to each set identifier in the first relationship, the key and scrambling information corresponding to the set identifier, to the first terminal device.

Step S203, the radio access network device receives the first packet.

In this embodiment, the first packet includes a set identifier, and the set identifier is, for example, a set 3A.

Step S204, the wireless access network equipment determines the first terminal equipment according to the set identifier.

According to the description in step S201, the radio access network device maintains a corresponding relationship between the set identifier and the transmission channel identifiers, where each transmission channel identifier corresponds to a terminal device. Based on this, the radio access network device may determine the first relationship, and then the radio access network device determines the transmission channel identifier corresponding to the set identifier from the first relationship. The transmission channel identifier is used for indicating the transmission channel of the first terminal device in the set indicated by the set identifier.

For example, in connection with table 2, the radio access network device may determine the correspondence of sets 3A and a1, and sets 3B and B1. Further, the radio access network device may determine the transmission channel identity a1 corresponding to the set identity set 3A. The transmission path indicated by the transmission path identification a1 corresponds to the terminal device 31.

Step S205, the radio access network device sends location information to the first terminal device.

The location information is used for indicating air interface resources. The air interface resource is used for bearing and transmitting the message. When the wireless access network equipment allocates the air interface resources, the position of the air interface resources can be determined at the same time. In some embodiments, the radio access network device sends the location information to the first terminal device via a Physical Downlink Control Channel (PDCCH).

In some embodiments, the air interface resource is one or more RBs, and accordingly, the RB number of each RB may indicate one or more RB positions. In other embodiments, the air interface resource is one or more time domain resources, and accordingly, the time slot indicating the location of the one or more time domain resources may be each time domain resource. In still other embodiments, the air interface resource is one or more frequency domain resources, and correspondingly, the frequency point indicating the position of the one or more frequency domain resources may be each frequency domain resource. In this application, the RB number, the slot, the frequency point, or the like is referred to as a location identity.

For example, according to the description of step S202, in this step, the implementation manner of the radio access network device sending the location information may include two.

The first implementation mode comprises the following steps: the set identification has no corresponding scrambling information. And the wireless access network equipment sends the position identification to the first terminal equipment.

The second embodiment: the set identification has no corresponding scrambling information. The wireless access network equipment scrambles the position identification by using the scrambling information corresponding to the set identification to obtain the position information, and then the wireless access network equipment sends the position information to the first terminal equipment.

In step S206, the first terminal device receives the location information.

For example, according to the description of step S205, in this step, the implementation manner of the first terminal device receiving the location information may include two.

The first implementation mode comprises the following steps: the first terminal device receives the location identity.

The second embodiment: and the first terminal equipment receives the position information, and then descrambles the position information to obtain the position identifier. For example, the first terminal device may descramble the location information using the stored scrambling information one by one until descrambling results in the location identification.

For example, the first terminal device may receive a message sent by broadcast, and may receive a message sent by unicast. Based on this, in this embodiment, the radio access network device may set two types of air interface resources, where the first type of air interface resource is used to send a broadcast-sent message, and the second type of air interface resource is used to send a broadcast-sent message. The two types of air interface resources can be distinguished by location information. For example, the air interface resource of the first type corresponds to the first location information, and the air interface resource of the second type corresponds to the second location information.

Based on this, in some embodiments, the air interface resource of the first type needs to be allocated in real time, and the air interface resource of the second type may be fixedly set. Further, the second position information is fixed. The first terminal device may identify whether the location information is the second location information, and if the location information is the second location information, the first terminal device determines that an air interface resource corresponding to the location information is used for unicast transmission of the packet. If the position information is not the second position information, the first terminal device determines that an air interface resource corresponding to the position information is used for broadcasting and sending the message.

In other embodiments, the first location information corresponds to first scrambling information and the second location information corresponds to second scrambling information. Correspondingly, in response to the position identifier obtained by descrambling with the first scrambling information, the terminal device determines that the position information is the first position information, and thus determines that the air interface resource corresponding to the position information is used for broadcasting and sending the message. And in response to the position identifier obtained by descrambling the second scrambling information, the terminal equipment determines that the position information is the second position information, so that the air interface resource corresponding to the position information is determined to be used for unicast message sending. The first scrambling information is for example BC C-RNTI. The first scrambling information is, for example, SPS C-RNTI.

It should be noted that the above description is made by taking an implementation scenario of a broadcast packet and a unicast packet as an example. In a multicast scenario, the first type of air interface resource may also be used to transmit a multicast or multicast-sent message, and the second type of air interface resource is used to transmit a unicast-sent message. Similarly, in a multicast scenario, the embodiments of the present application may also distinguish different types of air interface resources or other resources for transmitting a packet through the location information or other identifying information.

Therefore, by adopting the implementation mode, the first terminal equipment can identify the corresponding sending type of the message to be received according to the position information or the scrambling information. Moreover, the setting mode enables the first terminal device to simultaneously acquire the messages sent by adopting different sending modes from the two air interface resources, thereby improving the compatibility.

Step S207, the radio access network device sends the second packet to the first terminal device using the air interface resource.

According to the description of step S202, in this step, the radio access network device may send the second packet to the first terminal device by using four embodiments.

The first implementation mode comprises the following steps: the second message is the first message. The wireless access network equipment carries the first message in air interface resources and sends the first message to the first terminal equipment.

The second embodiment: the set identification corresponds to a key. The wireless access network equipment encrypts the first message by using the key to obtain a second message. And then, the radio access network equipment carries the second message in air interface resources and sends the second message to the first terminal equipment.

The third embodiment is as follows: the set identification corresponds to scrambling information. The wireless access network equipment scrambles the first message by using the scrambling information to obtain a second message. And then, the radio access network equipment carries the second message in air interface resources and sends the second message to the first terminal equipment.

The fourth embodiment: the set identification corresponds to scrambling information and a key. The wireless access network equipment encrypts the message by using the key, and then scrambles the encrypted message by using the scrambling information to obtain a second message. And then, the radio access network equipment carries the second message in air interface resources and sends the second message to the first terminal equipment.

By adopting the realization mode, the wireless access network equipment encrypts the message in different degrees before sending the message, thereby improving the safety of the message.

For example, the radio access network device sends the air interface resource carrying the second packet through the transmission channel indicated by the transmission channel identifier. With reference to table 2, the radio access network device sends the air interface resource carrying the second packet to the terminal device 31 through the transmission channel indicated by a 1.

Step S208, the first terminal device obtains the first message from the air interface resource.

After receiving the air interface resource carrying the second message, the first terminal device determines the air interface resource according to the location information obtained in step S206.

For example, corresponding to each example in step S207 in which the radio access network device sends the second message, in this step, the first terminal device acquires the first message by using the corresponding implementation manner.

The first implementation mode comprises the following steps: corresponding to the first implementation manner in step S207, the first terminal device directly reads the second message from the air interface resource to obtain the first message.

The second embodiment: corresponding to the second implementation manner in step S207, after the first terminal device reads the second packet from the air interface resource, the first terminal device decrypts the second packet by using each key in the stored keys until the first packet is obtained.

The third embodiment is as follows: corresponding to the third implementation manner in step S207, after the first terminal device reads the second message from the air interface resource, the first terminal device descrambles the second message by using the target scrambling information determined in step S206, so as to obtain the first message.

The fourth embodiment: corresponding to the fourth implementation manner in step S207, after the first terminal device reads the second message from the air interface resource, the first terminal device first descrambles the encrypted and scrambled message by using the target scrambling information determined in step S206, so as to obtain the encrypted message. Then, the first terminal device reads the key corresponding to the target scrambling information, and then the first terminal device decrypts the descrambled encrypted message by using the key to obtain the first message.

In addition, in other embodiments, to avoid malicious tampering of the set of the first terminal device and improve the security of the network, before the first terminal device processes and carries the first packet in the air interface resource, the first terminal device removes the set identifier included in the first packet.

For example, the embodiment of the method 200 is described by taking the first terminal device connected to the radio access network device as an example. In some embodiments, the radio access network device may further be connected to a second terminal device, and based on this, the radio access network device further needs to send a message to the second terminal device through an air interface resource. Similarly, the second terminal device needs to acquire the message from the air interface resource. The steps executed by the radio access network device, the steps executed by the second terminal device, and the information interaction process between the radio access network device and the second terminal device are similar to those described in the method 100. It should be understood that information such as the second relationship related to the second terminal device may be maintained in the radio access network device, and information related to the specific steps executed by the radio access network device and the second terminal device corresponds to the second terminal device. The present application is not described in detail herein.

For example, the method 200 is only an example of the present application for sending messages in a broadcast manner. The message transmission method of the application can also comprise an embodiment of sending an uplink message and sending the message in a unicast mode. See the description below for details.

In summary, according to the message transmission method provided by the present application, the radio access network device maintains information of a set related to the terminal device connected to the radio access network device, so that after receiving the downlink message, the radio access network device can determine the set to which the terminal device receiving the downlink message belongs. Based on this, in response to that the downlink packet is a packet to be broadcasted, the radio access network device can also determine, according to the set identifier of the set, the terminal device that receives the downlink packet. Furthermore, before sending, the radio access network device configures an air interface resource for the downlink message, and then sends the location information of the air interface resource to each terminal device receiving the downlink message, so that each terminal device can obtain the downlink message at the air interface resource. Therefore, the method for sending the message by broadcasting can only occupy one air interface resource no matter the number of the terminal equipment for receiving the message, thereby saving the air interface resource.

The technical solution of the present application is systematically described below with reference to examples.

For example, the following embodiments describe the technical solution of the present application by taking the 5th-generation (5G) mobile communication technology as an example. For example, technical terms appearing in the following embodiments may be terms of 5G mobile communication technology.

Fig. 5 shows a mobile network architecture 20. In this embodiment, the mobile network architecture 20 includes a UE21, a RAN22, a DN23, and a CP network element 24. The CP network element 24 may include network elements such as an AMF network element 241, an SMF network element 242, and a UDM network element 243. The UE21 is connected to DN23 through RAN22, and the CP network element 24 is connected to RAN22 and performs control plane signaling interaction with the UE21 through RAN 22.

The AMF network element 241 may be responsible for registration of a terminal device, mobility management, a tracking area update process, and the like. The AMF network element may also be referred to as an AMF device or an AMF entity.

The SMF network element 242 may be responsible for session management of the terminal device. For example, session management includes selection of a user plane device, reselection of the user plane device, network protocol (IP) address allocation, QoS control, and establishment, modification, or release of a session.

Among other things, the UDM network element 243 is able to store subscription data for the user. For example, the subscription data of the user includes subscription data related to mobility management and subscription data related to session management. The UDM network element may also be referred to as a UDM device or a UDM entity.

For example, the mobile network architecture 20 illustrated in fig. 5 is for illustrative purposes only and does not constitute a limitation on the mobile network architecture 20. In other embodiments, the mobile network architecture 20 may further include network elements different from those in the above embodiments, and furthermore, the connection manner of each network element may also be different from that in the above embodiments.

Further, the present application may construct a VLAN in the mobile network architecture 20, so that a network element in the mobile network architecture 20 transmits a message by means of the VLAN. In some embodiments, after constructing the VLAN, the UE21 and the CP network element 24 may communicate VLAN-related information via a Protocol Data Unit (PDU) session.

Fig. 6 shows a signaling interaction diagram of one embodiment of establishing a PDU session. The operation process of establishing the PDU session comprises the following steps:

in step S301, the UE21 sends a PDU session setup request to the SMF network element 242.

Wherein the PDU session setup request includes an identification of RAN 22.

In step S302, the SMF network element 242 obtains N VLAN ids corresponding to the UE21, and establishes Qos flows respectively corresponding to the N VLAN ids.

Wherein N is a positive integer of 1 or more.

In some embodiments of the present implementation scenario, during the process of establishing the VLAN, the UE21 may write data corresponding to the UE21 into the UDM network element 243, and therefore, the SMF network element 242 may send subscription data for obtaining the UE21 to the UDM network element 243, as shown in the dashed box in fig. 6. The UDM network element 243 feeds back subscription data of the UE21 to the SMF network element 242, where the subscription data includes VLAN id of each VLAN to which the UE21 belongs.

In other embodiments of the present implementation scenario, the subscription data of the UE21 may not include a VLAN id, and then the SMF network element 242 may send a request for obtaining the VLAN id corresponding to the UE21 to an Application Function (AF). And after obtaining the VLAN identifier corresponding to the UE21 from the DN, the AF sends the VLAN identifier to the SMF network element 242. (the signaling interaction procedure of this embodiment, not shown in fig. 6).

Further, the SMF network element 242 establishes a Qos flow corresponding to each VLAN id. The Qos flow is used to carry traffic for the UE21 in the VLAN indicated by the corresponding VLAN identification. Wherein, QoS flow uses QFI identification. In this embodiment, N QFIs are unique.

For example, N is 3. As shown in table 3, the correspondence relationship between the UE21, the VLAN id, and the QFI, 3 VLAN ids corresponding to the UE21 are, for example, V001, V002, and V003. The 3 QFIs are, for example, Q001, Q002 and Q003.

TABLE 3

In step S303, the SMF network element 242 sends the correspondence between the N VLAN ids and the N QFIs to the RAN 22.

Illustratively, the SMF network element 242 sends table 3 to the RAN 22.

At step S304, the RAN22 sends session response information to the UE 21.

In this embodiment, the RAN22 may detect one by one whether each VLAN id in the 3 VLAN ids has a corresponding BC-CNTI and a key. The BC-CNTI is used for scrambling the position information of the air interface resource and the message to be broadcasted and descrambling the scrambled information. The key is used to encrypt the message and decrypt the encrypted message. For example, V001 corresponds to BC-CNTI001 and key 001. The RAN22 sends Q001 to the UE21 corresponding to BC-CNTI001 and key 001. For example, V002 has no corresponding BC-CNTI and key, RAN22 configures BC-CNTI002 and key002 for V002, and sends Q002 to UE21 in correspondence with BC-CNTI002 and key 002. Accordingly, the RAN22 sends Q003 to the UE21 corresponding to BC-CNTI003 and key 003. Wherein BC-CNTI003 is BC-CNTI corresponding to V003. key003 is the key corresponding to V003.

In the embodiment illustrated in fig. 6, the SMF network element 242 is selected by the AMF network element 241 according to the load of each SMF in the core network. And, the information interaction between the SMF network element 242 and the UE21 and the RAN22 are forwarded by the AMF network element 241. In some embodiments, the AMF network element 241 forwards the information in a transparent transmission manner.

Therefore, by adopting the implementation mode, the RAN22 can acquire the corresponding relationship between the VLAN identifier and the QFI, so that when a message is received, a forwarding strategy can be formulated according to the VLAN identifier and the QFI, and an information basis is provided for forwarding the message.

Fig. 7 shows a transmission method of an uplink packet. The uplink message transmission method comprises the following steps:

at step S401, the UE21 sends an uplink message to the RAN22 using the Qos flow indicated by Q001.

Wherein, the uplink message includes QFI "Q001".

At step S402, RAN22 reads Q001 and determines V001 from Q001.

In step S403, the RAN22 adds V001 to the uplink packet, and forwards the packet with the added V001.

Fig. 8 shows a unicast method of a downlink packet. The unicast method of the downlink message comprises the following steps:

in step S501, the RAN22 receives a downlink packet sent by the DN23, where the downlink packet includes a VLAN id "V00X".

The VLAN identifier "V00X" indicates the VLAN to which the UE receiving the downlink packet belongs.

In step S502, the RAN22 identifies the QFI corresponding to the downlink packet.

For example, the RAN22 may identify the QFI corresponding to the downlink packet through packet filter sets (packet filter sets). In the present embodiment, QFI is, for example, Q001.

In step S503, the RAN22 reads the VLAN id "V00Y" corresponding to the QFI.

In step S504, the RAN22 determines whether "V00X" is the same as "V00Y", and if "V00X" is the same as "V00Y", performs step S505; if the V00X is different from the V00Y, the message is discarded.

In step S505, the RAN22 sends the downlink packet to the target UE through the Qos flow indicated by the QFI.

Illustratively, "V00X" is, for example, V001 and QFI is, for example, Q001. The "V00Y" read by the RAN22 from "Q001" is V001. "V00X" is the same as "V00Y", and indicates that the UE receiving the downlink packet belongs to V00X. The RAN22 sends downlink messages to the UE21 via the Qos flow indicated by Q001. Wherein, before the RAN22 sends the downlink message to the UE21, V001 may be removed.

If QFI is Q005, the RAN22 reads "V00Y" as V005 according to "Q005", indicating that the UE receiving the downlink packet does not belong to V00X.

It can be seen that, with the present implementation, the RAN22 can avoid the UE outside the target VLAN (i.e., V00X) that sends the downlink packet to be unicast before unicasting the downlink packet.

Fig. 9 shows a method for broadcasting a downlink packet. The method for broadcasting the downlink message comprises the following steps:

in step S601, the RAN22 receives the downlink message sent by the DN 23.

Illustratively, the downlink message includes V001. The V001 indication downlink message is to be broadcast to all UEs in the V001 indication VLAN.

The embodiment illustrated in fig. 9 is described below with UE21 as an example.

At step S602, the RAN22 determines the UE21 from V001.

Where RAN22 determines one or more UEs from V001. The one or more UEs include UE 21. The illustrated embodiment of fig. 9 shows only UE21, and the other UEs of the one or more UEs are not shown.

Taking UE21 as an example, RAN22 may determine the correspondence relationship shown in table 3, and RAN22 determines Q001 corresponding to V001 from the correspondence relationship shown in table 3, and then RAN22 may determine UE21 according to Q001. Similarly, the RAN22 may also determine other correspondences, then determine the QFI corresponding to V001 from the other correspondences, and finally determine one or more UEs.

In step S603, the RAN22 allocates an RB and reads the RB number R001 of the RB.

For example, the RAN22 may adaptively allocate one or more RBs to carry the downlink packet according to the size of the downlink packet. For example, in this embodiment, the downlink packet may use one RB bearer.

At step S604, the RAN22 scrambles the RB number R001 with the BC-CNTI001 corresponding to V001.

In step S605, the RAN22 transmits the scrambled R001 to the UE21 through the PDCCH.

In step S606, the UE21 descrambles the scrambled R001 one by using BC-CNTI001, BC-CNTI002 and BC-CNTI003 to obtain R001 and determine target scrambling information BC-CNTI 001.

In step S607, the RAN22 transmits the target message to the UE21 through the RB.

The RAN22 encrypts the downlink message by using key001, and then the RAN22 scrambles the encrypted downlink message by using BC-CNTI001 to obtain the target message.

For example, the RAN22 sends the RB carrying the target packet through the Qos flow indicated by Q001.

In step S608, the UE21 reads the target packet from the RB indicated by R001.

In step S609, the UE21 determines a downlink packet according to the target packet.

For example, the UE21 descrambles the target message using BC-CNTI001 to obtain an encrypted message. Then, the UE21 decrypts the encrypted message by using key001, to obtain a downlink message.

For example, the method for broadcasting the downlink packet illustrated in fig. 9 is only schematically illustrated. In actual operation, the RAN22 may also allocate multiple RBs for the downlink packet, where the multiple RBs are referred to as an air interface resource. The operation of the RAN22 for each RB is similar to that described above in response to the RAN22 allocating multiple RBs. Operation of the UE21 after receiving multiple RBs is also similar to that described above. And will not be described in detail herein.

For example, the RAN22 may receive the channel quality parameters sent by the UE 21. In response to the channel quality parameter falling below a certain value, the RAN22 may select another RAN based on the loading condition and then switch the traffic corresponding to the RAN22 to the selected RAN.

Fig. 10 shows a first embodiment of a handover method of a RAN. In this embodiment, for example, the RAN22 is handed over to the RAN 100. The handover method 1 comprises the following steps:

in step S701, the RAN22 sends the correspondence between the N VLAN ids and the N QFIs to the RAN 100.

For example, the RAN100 performs all the subsequent service interactions of all the UEs connected to the RAN22, so the RAN100 should maintain the corresponding UE, the VLAN of the corresponding UE, and the Qos flow correspondence relationship of the corresponding UE in each VLAN. Based on this, the RAN22 should send the correspondence maintained by the RAN22 to the RAN100 before each UE establishes a connection with the RAN 100.

In step S702, the RAN100 determines new scrambling information and a new key corresponding to each VLAN id in the N VLAN ids.

The new scrambling information and the new key in this step refer to the scrambling information corresponding to each VLAN id and the key corresponding to each VLAN id, which are configured by the RAN 100.

For example, N VLAN ids each have scrambling information and a key corresponding to RAN22, but it can be seen from the above description of the embodiments that all the scrambling information maintained in each RAN is different, and all the keys maintained in each RAN are different. Based on this, in order to facilitate the RAN100 to maintain the corresponding relationship of each item of information and facilitate the normal execution of the subsequent operation, the RAN100 should set new scrambling information and a new key for each VLAN identifier in the N VLAN identifiers according to the information maintained by the RAN 100.

Similar to the description of step S304 in the embodiment illustrated in fig. 6, a partial VLAN id of the N VLAN ids may have been maintained in the RAN100, and then each VLAN id of the partial VLAN ids corresponds to new scrambling information, and each VLAN id of the partial VLAN ids corresponds to a new key. While the VLAN id in the RAN100 is not maintained among the N VLAN ids, the RAN100 assigns new scrambling information corresponding to each VLAN id, and assigns a new key corresponding to each VLAN id.

In step S703, the RAN100 sends new scrambling information and a new key corresponding to each VLAN id in the N VLAN ids to the RAN 22.

In step S704, the RAN22 sends new scrambling information and a new key corresponding to each of the N VLAN ids to the UE 21.

At step S705, the UE21 establishes a connection with the RAN 100.

For example, after the UE21 establishes a connection with the RAN100, the UE21 disconnects from the RAN 22.

Fig. 11 shows a second embodiment of a handover method of a RAN. In this embodiment, the RAN22 is still switched to the RAN100 as an example. The switching method 2 comprises the following steps:

at step S801, the RAN22 sends a handover request to the RAN 100.

At step S802, the RAN100 sends a request message to the SMF network element 242, the request message including an identification of the RAN 22.

In step S803, the SMF network element 242 sends the correspondence between the N VLAN ids and the N QFIs to the RAN 100.

In step S804, the RAN100 determines new scrambling information and a new key corresponding to each VLAN id in the N VLAN ids.

In step S805, the RAN100 sends new scrambling information and a new key corresponding to each of the N VLAN ids to the UE 21.

At step S806, the UE21 establishes a connection with the RAN 100.

The RAN100 sends a message to release resources to the RAN22 at step S807.

At step S808, the RAN22 deletes the maintained information.

Similar to the embodiment illustrated in fig. 6, in the handover method 2, information interaction between the RAN100 and the SMF network element 242 may be forwarded via the AMF network element 241. And will not be described in detail herein.

For example, the message transmission methods illustrated in fig. 6 to 11 are only schematic illustrations and do not constitute limitations to the message transmission methods of the present application. In other embodiments, each operation process of the message transmission method may also be established on the basis of a networking mode different from that in the above embodiment, and a network element performing information interaction in the message transmission method may be different from that in the above embodiment.

For example, the message transmission methods illustrated in fig. 5 to 11 are described by taking a VLAN as an example, and do not limit the message transmission method of the present application. In other embodiments, the message transmission method may also be performed based on a multicast group. The implementation process of the packet transmission method implemented based on the multicast group is similar to the description of the above embodiments, and the detailed description of this embodiment is omitted here.

In summary, in the present application, the radio access network device maintains the correspondence between the set identifier and the transmission channel identifier, and the message to be broadcasted includes the set identifier. Based on this, after the radio access network device receives the message to be broadcasted, the terminal device receiving the message can be determined according to the set identifier. Then, the radio access network device sends location information to the terminal device, where the location information indicates an air interface resource for transmitting the packet. And then, the radio access network equipment sends the message to the terminal equipment through the air interface resource. Therefore, the radio access network equipment only uses one air interface resource to transmit the message to be broadcasted. The operation mode ensures that no matter the number of the terminal equipment receiving the message, one air interface resource is occupied, thereby saving the air interface resource.

In the embodiments provided in the present application, the schemes of the message transmission method provided in the embodiments of the present application are introduced from the perspective of each device itself and from the perspective of interaction between the devices. For example, each network element and device, such as the above-mentioned radio access network device, access and mobility management function network element, terminal device, data management function network element and network slice selection function network element, includes a hardware structure and/or a software module corresponding to each function in order to implement the above-mentioned functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

For example, if the above-mentioned device implements the corresponding functions through a software module. As shown in fig. 12A, the radio access network apparatus 1200 may include a receiving module 1201, a processing module 1202, and a transmitting module 1203.

In one embodiment, the radio access network device 1200 may be used to perform the operations of the radio access network devices of fig. 2, 3, 6, and 9 described above. For example:

the receiving module 1201 is configured to receive a first packet. Wherein the first message includes a set identifier. The processing module 1202 is configured to determine the first terminal device according to the set identifier. Wherein the first terminal device belongs to the set indicated by the set identifier. The sending module 1203 is configured to send the location information to the first terminal device. The location information is used for indicating air interface resources. In this embodiment, the sending module 1203 is further configured to send a second message to the first terminal device through an air interface resource, where the second message is obtained according to the first message.

It can be seen that, in the present application, the radio access network device 1200 allocates only one air interface resource to a message to be broadcasted, and by sending the location information of the allocated air interface resource to one or more terminal devices, the one or more terminal devices share the location information of the air interface resource, and further, the one or more terminal devices can share one air interface resource, so that the air interface resource can be saved.

Optionally, the processing module 1202 is further configured to determine the second terminal device according to the set identifier. Wherein the second terminal device belongs to the set indicated by the set identifier. The sending module 1203 is further configured to send the location information to the second terminal device, and send the second message to the second terminal device through the air interface resource.

Optionally, the processing module 1202 is further configured to determine a corresponding relationship between the set identifier and the transmission channel identifier included in the first relationship. And the transmission channel indicated by the transmission channel identifier is used for the radio access network equipment to send the second message to the first terminal equipment.

Optionally, the receiving module 1201 is further configured to receive the first relationship from the first network element.

Optionally, the receiving module 1201 is specifically configured to receive the first relationship from a network element of a core network. The receiving module 1201 is further specifically configured to receive the first relationship from a source radio access network device, where the source radio access network device connects to the first terminal device before the radio access network device connects to the first terminal device.

Optionally, the processing module 1202 is further configured to determine that the set identifier corresponds to the first key. The sending module 1203 is further configured to send the first key to the first terminal device. The processing module 1202 is further configured to determine that the set identifier corresponds to first scrambling information. The sending module 1203 is further configured to send the first scrambling information to the first terminal device. The processing module 1202 is further configured to determine that the set identifier corresponds to the first key and the set identifier corresponds to the first scrambling information. The sending module 1203 is further configured to send the first key and the first scrambling information to the first terminal device.

Optionally, the processing module 1202 is further configured to determine that the set identifier has no corresponding key, and configure a second key corresponding to the set identifier. The sending module 1203 is further configured to send the second key to the first terminal device. The processing module 1202 is further configured to determine that the set identifier does not have corresponding scrambling information, and configure second scrambling information corresponding to the set identifier. The sending module 1203 is further configured to send the second scrambling information to the first terminal device. The processing module 1202 is further configured to determine that the set identifier has no corresponding key and the set identifier has no corresponding scrambling information, and configure a second key corresponding to the set identifier and second scrambling information corresponding to the set identifier. The sending module 1203 is further configured to send the second key and the second scrambling information to the first terminal device.

Optionally, the sending module 1203 is specifically configured to send the location identifier of the air interface resource to the first terminal device. The processing module 1202 is further configured to scramble the location identifier of the air interface resource using the first scrambling information. The sending module 1203 is further specifically configured to send the scrambled location identifier to the first terminal device.

Optionally, the sending module 1203 is specifically configured to send the first packet to the first terminal device. The processing module 1202 is further configured to encrypt the first packet using the first key. The sending module 1203 is further specifically configured to send the encrypted first packet to the first terminal device. The processing module 1202 is further configured to scramble the first packet using the first scrambling information. The sending module 1203 is further specifically configured to send the scrambled first packet to the first terminal device. The processing module 1202 is further configured to encrypt the first packet using the first key, and scramble the encrypted first packet using the first scrambling information. The sending module 1203 is further specifically configured to send the scrambled and encrypted first packet to the first terminal device.

In another embodiment, the radio access network apparatus 1200 shown in fig. 12A may also be configured to perform the operations of the network element RAN in fig. 7 described above. For example: the receiving module 1201 is configured to receive a message from a terminal device, where the message includes a transmission channel identifier, and the transmission channel identifier indicates a transmission channel through which the terminal device sends the message. The processing module 1202 is configured to determine a set identifier corresponding to the transmission channel identifier, where the terminal device belongs to the set indicated by the set identifier. In this embodiment, the processing module 1202 is further configured to add the set identifier to the packet.

It can be seen that, with the implementation manner, when the radio access network device 1200 receives the packet, the forwarding policy can be formulated according to the set identifier and the transmission channel identifier, so as to provide an information basis for forwarding the packet.

Optionally, the processing module 1202 is specifically configured to determine a corresponding relationship between the set identifier and the transmission channel identifier included in the first relationship.

Optionally, the receiving module 1201 is specifically configured to receive the first relationship from a network element of a core network. The receiving module 1201 is further specifically configured to receive the first relationship from a source radio access network device, where the source radio access network device connects to the terminal device before the radio access network device connects to the terminal device.

In yet another embodiment, the radio access network apparatus 1200 shown in fig. 12A may also be configured to perform the operations of the network element RAN in fig. 8 described above. For example: the receiving module 1201 is configured to receive a message, where the message includes a first set identifier. The processing module 1202 is configured to determine a transmission channel identifier corresponding to the packet, where the transmission channel identifier indicates a transmission channel through which the radio access network device transmits the packet, and determine a second set identifier according to the transmission channel identifier. The sending module 1203 is configured to send the packet to the terminal device through the transmission channel in response to that the first set identifier is the same as the second set identifier.

It can be seen that, with the implementation manner, before unicasting the downlink packet, the radio access network device 1200 can avoid a terminal device outside a target set that sends the downlink packet to be unicasted.

Optionally, the processing module 1202 is specifically configured to determine a corresponding relationship between the second set identifier and the transmission channel identifier included in the first relationship.

Fig. 12B shows another possible structure diagram of the radio access network device 1200 involved in the above embodiment. Radio access network device 1210 includes a transceiver 1204, a processor 1205, and a memory 1206. As shown in fig. 12B. The memory 1206 is for coupling with a processor 1205 that stores the necessary computer programs 1207 for the radio access network device 1210.

For example, in one embodiment, the processor 1205 is configured as other operations or functions of the radio access network device 1210. The transceiver 1204 is used to enable communication between the radio access network device 1210 and the terminal device.

In another embodiment, the processor 1205 is configured as other operations or functions of the radio access network device 1210. The transceiver 1204 is used to enable communication between the radio access network equipment 1210 and network elements.

Correspondingly, as shown in fig. 13A, the present application also provides a terminal device 1300. The terminal device 1300 may include a receiving module 1301 and a processing module 1302.

In one embodiment, the terminal device 1300 is configured to perform the operations of the first terminal device in fig. 3, the UE in fig. 6 and fig. 9. For example: the receiving module 1301 is used for receiving location information from a radio access network device. The processing module 1302 is configured to determine that the location information is first location information or second location information, where the first location information indicates a first air interface resource used for transmitting a broadcast packet, and the second location information indicates a second air interface resource used for transmitting a unicast packet. In this embodiment, the processing module 1302 is further configured to receive a second message from the radio access network device through the first air interface resource or the second air interface resource, and obtain the first message according to the second message.

Therefore, with the implementation manner, the terminal device 1300 can identify the corresponding sending type of the message to be received according to the position information or the scrambling information. Moreover, the setting mode enables the first terminal device to simultaneously acquire the messages sent by adopting different sending modes from two air interface resources, thereby improving the compatibility.

Optionally, the processing module 1302 is further configured to descramble the location information by using each scrambling information of the at least two scrambling information. In response to successful descrambling with the first scrambling information, the processing module 1302 is further configured to determine that the location information is the first location information, and the first scrambling information corresponds to a set identifier of a set to which the first terminal device belongs. In response to descrambling using the second scrambling information being successful, the processing module 1302 is further configured to determine that the location information is the second location information, the second scrambling information corresponding to the first terminal device.

Optionally, the processing module 1302 is specifically configured to read the second packet as the first packet. The processing module 1302 is further specifically configured to descramble the second packet by using the first scrambling information, so as to obtain the first packet. The processing module 1302 is further specifically configured to descramble the second packet by using the first scrambling information, and decrypt the descrambled packet by using a first key, so as to obtain the first packet, where the first key corresponds to the set identifier.

Fig. 13B shows another possible structure diagram of the terminal device 1300 involved in the above embodiment. Terminal device 1310 includes a transceiver 1303, a processor 1304, and a memory 1305. As shown in fig. 13B. The memory 1305 is used for coupling with the processor 1304 and holds the necessary computer programs 1306 for the terminal device 1310.

For example, in one embodiment, processor 1304 is configured for other operations or functions of terminal device 1310. The transceiver 1303 is used for communication between the terminal device 1310 and the radio access network device.

As shown in fig. 14A, the present application also provides a network element 1400. The network element 1400 is a control plane network element. The network element 1400 may comprise a receiving module 1401 and a sending module 1402.

In one embodiment, the network element 1400 may be configured to perform the operations of the control plane network element in fig. 3. For example: the receiving module 1401 is configured to receive request information from a first terminal device, where the request information includes a radio access network device identifier. The sending module 1402 is configured to send a first relationship to the radio access network device, where the first relationship includes a correspondence between a first set identifier and a first transmission channel identifier, the first set identifier indicates a first set to which the first terminal device belongs, and a transmission channel indicated by the first transmission channel identifier is used for the radio access network device to transmit a packet with the first terminal device in the first set.

Therefore, the network element 1400 in the present application sends the corresponding relationship between the set identifier and the transmission channel identifier related to the terminal device to the radio access network device, so that after the radio access network device receives the packet, the policy for forwarding the packet can be determined according to the set identifier or the transmission channel identifier corresponding to the packet.

Optionally, the network element 1400 further includes a processing module, where the processing module is configured to obtain the first set identifier. The processing module is further configured to establish the first transmission channel corresponding to the first set identifier, so as to obtain the first relationship.

Optionally, the processing module is specifically configured to obtain the first set identifier from the second network element. The processing module is further specifically configured to obtain the first set identifier from a data network.

Optionally, the receiving module 1401 is further configured to receive request information from the second terminal device, where the request information includes the radio access network device identifier. The sending module 1402 is further configured to send a second relationship to the radio access network device, where the second relationship includes a corresponding relationship between a first set identifier and a second transmission channel identifier, the first set identifier indicates that the second terminal device belongs to the first set, and a transmission channel indicated by the second transmission channel identifier is used for the radio access network device to transmit a packet with the second terminal device in the first set.

In another embodiment, the network element 1400 shown in fig. 14A may be used to perform the operations of the network element SMF in fig. 6 described above. And will not be described in detail herein.

Fig. 14B shows another possible schematic structure of the network element 1400 involved in the above embodiments. Network element 1410 includes transceiver 1404, processor 1405, and memory 1406. As shown in fig. 14B. The memory 1406 is for coupling with the processor 1405 and holds the computer programs 1407 necessary for the network element 1410.

For example, in one embodiment, the processor 1405 is configured to other operations or functions of the network element 1410. The transceiver 1404 is used to enable communication between the network element 1410 and the radio access network equipment.

Corresponding to the devices, the application also provides a network. The network comprises radio access network equipment, terminal equipment and network elements. The radio access network device may be the radio access network device provided in the corresponding embodiment of fig. 12A or fig. 12B. The terminal device may be the terminal device provided in the embodiment corresponding to fig. 13A or fig. 13B. The network element may be the terminal device provided in the embodiment corresponding to fig. 14A or fig. 14B. The network is configured to perform the methods in the embodiments corresponding to fig. 2, fig. 3, fig. 4, fig. 6 to fig. 11.

In specific implementation, corresponding to a radio access network device, a terminal device and a network element, the present application also provides a computer storage medium respectively, where the computer storage medium disposed in any device may store a program, and when the program is executed, part or all of the steps in each embodiment of the message transmission method provided in fig. 2, fig. 3, fig. 4, and fig. 6 to fig. 11 may be implemented. The storage medium in any device may be a magnetic disk, an optical disk, a read-only memory (ROM), a Random Access Memory (RAM), or the like.

One or more of the above modules or units may be implemented in software, hardware or a combination of both. When any of the above modules or units are implemented in software, which is present as computer program instructions and stored in a memory, a processor may be used to execute the program instructions and implement the above method flows. The processor may include, but is not limited to, at least one of: various computing devices that run software, such as a Central Processing Unit (CPU), a microprocessor, a Digital Signal Processor (DSP), a Microcontroller (MCU), or an artificial intelligence processor, may each include one or more cores for executing software instructions to perform operations or processing. The processor may be built in an SoC (system on chip) or an Application Specific Integrated Circuit (ASIC), or may be a separate semiconductor chip. The processor may further include a necessary hardware accelerator such as a Field Programmable Gate Array (FPGA), a PLD (programmable logic device), or a logic circuit for implementing a dedicated logic operation, in addition to a core for executing software instructions to perform an operation or a process.

When the above modules or units are implemented in hardware, the hardware may be any one or any combination of a CPU, a microprocessor, a DSP, an MCU, an artificial intelligence processor, an ASIC, an SoC, an FPGA, a PLD, a dedicated digital circuit, a hardware accelerator, or a discrete device that is not integrated, which may run necessary software or is independent of software to perform the above method flows.

When the above modules or units are implemented using software, they may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

It should be understood that, in the various embodiments of the present application, the size of the serial number of each process does not mean the execution sequence, and the execution sequence of each process should be determined by the function and the inherent logic thereof, and should not constitute any limitation to the implementation process of the embodiments.

All parts of the specification are described in a progressive mode, the same and similar parts of all embodiments can be referred to each other, and each embodiment is mainly introduced to be different from other embodiments. In particular, as to the apparatus and system embodiments, since they are substantially similar to the method embodiments, the description is relatively simple and reference may be made to the description of the method embodiments in relevant places.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.

Claims

1. A method for packet transmission, the method comprising:

the method comprises the steps that a wireless access network device receives a first message, wherein the first message comprises a set identifier;

the radio access network equipment determines first terminal equipment according to the set identifier, wherein the first terminal equipment belongs to the set indicated by the set identifier, and determines air interface resources according to the first message;

the wireless access network equipment sends position information to the first terminal equipment, wherein the position information is used for indicating the air interface resource, and the wireless access network equipment broadcasts a message to all terminal equipment in the set indicated by the set identifier through the air interface resource;

and the wireless access network equipment sends a second message to the first terminal equipment through the air interface resource, wherein the second message is obtained according to the first message.

2. The message transmission method according to claim 1, further comprising:

the wireless access network equipment determines second terminal equipment according to the set identification, wherein the second terminal equipment belongs to the set indicated by the set identification;

the wireless access network equipment sends the position information to the second terminal equipment;

and the wireless access network equipment sends the second message to the second terminal equipment through the air interface resource.

3. The message transmission method according to claim 1, wherein the determining, by the radio access network device, the first terminal device according to the set identifier comprises:

and the radio access network equipment determines the corresponding relation between the set identifier and the transmission channel identifier in the first relation, wherein the transmission channel indicated by the transmission channel identifier is used for the radio access network equipment to send the second message to the first terminal equipment.

4. The message transmission method according to claim 3, wherein before the radio access network device determines that the first relationship includes the corresponding relationship between the set identifier and the transmission channel identifier, the method further includes:

the radio access network device receives the first relationship from a first network element.

5. The message transmission method of claim 4, wherein the receiving, by the radio access network device, the first relationship from the first network element comprises:

the radio access network equipment receives the first relation from a network element of a core network;

alternatively, the first and second electrodes may be,

the radio access network device receives the first relationship from a source radio access network device, the source radio access network device connecting to the first terminal device before the radio access network device connecting to the first terminal device.

6. The message transmission method according to any one of claims 1 to 5, wherein before the radio access network device sends the second message to the first terminal device over the air interface resource, the method further includes:

the radio access network device determines that the set identification corresponds to a first key,

the wireless access network equipment sends the first key to the first terminal equipment;

alternatively, the first and second electrodes may be,

the radio access network device determines that the set identification corresponds to first scrambling information,

the wireless access network equipment sends the first scrambling information to the first terminal equipment;

alternatively, the first and second electrodes may be,

the radio access network device determines that the set identification corresponds to a first key and the set identification corresponds to first scrambling information,

and the radio access network equipment sends the first key and the first scrambling information to the first terminal equipment.

7. The message transmission method according to any one of claims 1 to 5, wherein before the radio access network device sends the second message to the first terminal device over the air interface resource, the method further includes:

the radio access network device determines that the set identification does not have a corresponding key,

the radio access network device configures a second key corresponding to the set identification,

the wireless access network equipment sends the second key to the first terminal equipment;

alternatively, the first and second electrodes may be,

the radio access network device determines that the set identification does not have corresponding scrambling information,

the radio access network device configures second scrambling information corresponding to the set identification,

the wireless access network equipment sends the second scrambling information to the first terminal equipment;

alternatively, the first and second electrodes may be,

the radio access network device determining that the set identification does not have a corresponding key and that the set identification does not have corresponding scrambling information,

the radio access network device configures a second key corresponding to the set identification and second scrambling information corresponding to the set identification,

and the radio access network equipment sends the second key and the second scrambling information to the first terminal equipment.

8. The message transmission method according to claim 6, wherein the sending, by the radio access network device, the location information to the first terminal device includes:

the wireless access network equipment sends the position identification of the air interface resource to the first terminal equipment;

alternatively, the first and second electrodes may be,

the wireless access network equipment scrambles the position identification of the air interface resource by using the first scrambling information;

and the radio access network equipment sends the scrambled position identification to the first terminal equipment.

9. The message transmission method according to claim 6, wherein the sending, by the radio access network device, the second message to the first terminal device over the air interface resource includes:

the wireless access network equipment sends the first message to the first terminal equipment;

alternatively, the first and second electrodes may be,

the wireless access network equipment encrypts the first message by using the first key;

the wireless access network equipment sends the encrypted first message to the first terminal equipment;

alternatively, the first and second electrodes may be,

the wireless access network equipment scrambles the first message by using the first scrambling information;

the wireless access network equipment sends the scrambled first message to the first terminal equipment;

alternatively, the first and second electrodes may be,

the wireless access network equipment scrambles the encrypted first message by using the first scrambling information;

and the wireless access network equipment sends the scrambled and encrypted first message to the first terminal equipment.

10. A method for packet transmission, the method comprising:

the terminal equipment receives the position information from the wireless access network equipment;

the terminal device determines that the position information is first position information or second position information, the first position information indicates a first air interface resource used for broadcasting messages to all terminal devices in a target set, the second position information indicates a second air interface resource used for only transmitting messages to the terminal devices, and the target set indicates a set to which the terminal devices belong;

the terminal equipment receives a second message from the wireless access network equipment through the first air interface resource or the second air interface resource;

and the terminal equipment acquires the first message according to the second message.

11. The message transmission method according to claim 10, wherein the determining, by the terminal device, that the location information is the first location information or the second location information includes:

the terminal equipment uses each scrambling information in at least two scrambling information to descramble the position information;

in response to descrambling using first scrambling information being successful, the terminal device determining that the location information is the first location information, the first scrambling information corresponding to a set identification of a set to which the terminal device belongs;

in response to descrambling using second scrambling information being successful, the terminal device determines that the location information is the second location information, the second scrambling information corresponding to the terminal device.

12. The message transmission method according to claim 11, wherein the acquiring, by the terminal device, the first message according to the second message includes:

the terminal equipment reads the second message as the first message;

alternatively, the first and second electrodes may be,

the terminal equipment descrambles the second message by using the first scrambling information to obtain the first message;

alternatively, the first and second electrodes may be,

the terminal equipment descrambles the second message by using the first scrambling information;

and the terminal equipment decrypts the descrambled message by using a first key to obtain the first message, wherein the first key corresponds to the set identifier.

13. A radio access network device, comprising:

a receiving module, configured to receive a first packet, where the first packet includes a set identifier;

a processing module, configured to determine, according to the set identifier, a first terminal device, where the first terminal device belongs to the set indicated by the set identifier, and determine an air interface resource according to the first packet;

a sending module, configured to send location information to the first terminal device, where the location information is used to indicate an air interface resource, and the radio access network device broadcasts a packet to all terminal devices in the set indicated by the set identifier through the air interface resource;

the sending module is further configured to send a second message to the first terminal device through the air interface resource, where the second message is obtained according to the first message.

14. The radio access network device of claim 13,

the processing module is further configured to determine a second terminal device according to the set identifier, where the second terminal device belongs to the set indicated by the set identifier;

the sending module is further configured to send the location information to the second terminal device, and send the second packet to the second terminal device through the air interface resource.

15. The radio access network device of claim 13,

the processing module is further configured to determine a corresponding relationship between the set identifier and a transmission channel identifier included in the first relationship, where a transmission channel indicated by the transmission channel identifier is used for the radio access network device to send the second packet to the first terminal device.

16. The radio access network device of claim 15,

the receiving module is further configured to receive the first relationship from the first network element.

17. A terminal device, comprising:

a receiving module for receiving location information from a wireless access network device;

a processing module, configured to determine that the location information is first location information or second location information, where the first location information indicates a first air interface resource used for transmitting a broadcast packet, and the second location information indicates a second air interface resource used for transmitting a unicast packet;

the processing module is further configured to receive a second message from the radio access network device through the first air interface resource or the second air interface resource, and obtain a first message according to the second message.

18. The terminal device of claim 17,

the processing module is further configured to descramble the location information using each scrambling information of the at least two scrambling information;

in response to descrambling using first scrambling information being successful, the processing module is further configured to determine that the location information is the first location information, where the first scrambling information corresponds to a set identifier of a set to which the terminal device belongs;

in response to descrambling using second scrambling information being successful, the processing module is further configured to determine that the location information is the second location information, the second scrambling information corresponding to the terminal device.