CN108886822B

CN108886822B - Method and device for transmitting data

Info

Publication number: CN108886822B
Application number: CN201680080741.2A
Authority: CN
Inventors: 金辉; 欧阳国威; 段小嫣; 何岳
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-07-04
Filing date: 2016-08-22
Publication date: 2021-10-01
Anticipated expiration: 2036-08-22
Also published as: WO2018006480A1; CN108886822A

Abstract

The invention provides a method and equipment for transmitting data, wherein the method comprises the following steps: receiving a first message sent by User Equipment (UE) by first Radio Access Network (RAN) equipment, wherein the first message comprises data and a first identifier; the first RAN equipment determines transmission path information of the data according to the first identification; and the first RAN equipment forwards the data according to the transmission path information of the data. Therefore, when the idle UE has a data sending requirement, the signaling overhead in the data transmission process can be reduced, and the data transmission efficiency is improved.

Description

Method and device for transmitting data

This application claims priority from PCT patent application No. PCT/CN2016/088432 entitled "method and apparatus for transmitting data," filed by the chinese patent office at 2016, month 07, 4, the entire contents of which are incorporated herein by reference.

Technical Field

The present invention relates to the field of communications, and in particular, to a method and apparatus for transmitting data.

Background

In an existing communication system, when a User Equipment (UE) enters an Idle (Idle) state, a base station deletes context information of the UE stored in the base station. In this case, when the UE in the Idle state needs to send or receive data, signaling interaction between the UE and a base station (eNodeB), between the eNodeB and a Mobility Management Entity (MME), and between the MME and a Serving GateWay (SGW) needs to be performed multiple times to enable the UE to enter a Connected (Connected) state, and after the data is sent or received, signaling interaction also needs to be performed multiple times to enable the UE to enter the Idle state.

Especially for instant messaging services such as WeChat, microblog and QQ, long connection needs to be realized between a mobile phone client and an application server by frequently sending heartbeat packets (small data packets) in order to ensure that the services are always online, and frequent sending of the heartbeat packets can cause the UE to frequently switch between an Idle state and a Connected state, thereby causing higher signaling overhead and influencing the transmission efficiency of data.

Disclosure of Invention

The application provides a method and equipment for transmitting data, which can reduce signaling overhead in the data transmission process and improve the data transmission efficiency.

To facilitate an understanding of the present application, several elements that will be introduced in the description of the present application are first introduced here:

encryption processing: the information to be transmitted is encrypted and/or integrity protected.

Key set: including encryption keys and/or integrity protected keys.

In a Connected state, a Radio Resource Control (RRC) connection is established between a User Equipment (UE) and a Radio Access Network (RAN) device.

Idle (Idle) state, there is no RRC connection between the UE and the RAN equipment.

In a Suspend (Suspend) state, there is no RRC connection between the UE and the RAN device, but context information of the UE is stored in both the RAN device and the UE, and the RRC connection between the UE and the RAN device may be recovered through a Resume message, and optionally, a Data Radio Bearer (DRB) for transmitting Data between the UE and the RAN device may also be recovered.

The UE identifier may be an identifier allocated to the UE by the RAN device, or an identifier allocated to the UE by a control plane device (CP Function).

In a first aspect, a method for transmitting data is provided, where a first radio access network RAN device receives a first message sent by a user equipment UE, where the first message includes data and a first identifier; the first RAN equipment determines transmission path information of the data according to the first identification; and the first RAN equipment forwards the data according to the transmission path information of the data.

Therefore, according to the method for transmitting data in the embodiment of the present application, the RAN device in the radio access network may determine the transmission path information of the data of the UE through the first identifier sent while the UE sends the data, and forward the data of the UE according to the path transmission information, so that when the UE in an idle state has a data sending requirement, it is not necessary to reestablish the user plane connection between the UE and the RAN device, the signaling connection between the RAN device and the control plane device in the core network device, and the user plane connection between the RAN device and the user plane device in the core network device, thereby reducing the signaling overhead in the data transmission process and improving the efficiency of transmitting data.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the receiving, by the first radio access network RAN device, a first message sent by a user equipment UE, where the first message includes data and a first identifier, includes: a first RAN device receives the first message sent by the UE, where the first message includes the data encrypted by a first key group, the first identifier encrypted by the first key group, the identifier of the UE, and an identifier of a core network device;

wherein, the determining, by the first RAN device, the transmission path information of the data according to the first identifier includes: the first RAN device sends, to the core network device, a second message according to the identifier of the core network device, where the second message includes the identifier of the UE and the first identifier encrypted by the first secret key group, so that the core network device sends, to the first RAN device, context information of the UE after verifying that the UE is legitimate according to the identifier of the UE and the first identifier encrypted by the first secret key group, where the context information of the UE includes the first secret key group, the first identifier, and transmission path information corresponding to the first identifier; the first RAN device determines the transmission path information corresponding to the first identifier as the transmission path information of the data.

That is, when the first RAN device does not store the context information of the UE, the first RAN device may request the core network device for the context information of the UE, and obtain the transmission path information of the data of the UE from the requested context information of the UE.

Optionally, the implementation manner of the core network device verifying whether the UE is legal according to the identifier of the UE and the first identifier encrypted by the first key group is as follows: the core network equipment obtains a first key group from the stored context information of the UE according to the identifier of the UE, decrypts the encrypted first identifier of the first key group by adopting the first key group, and if the encrypted first identifier of the first key group can be decrypted and is consistent with the first identifier stored in the core network equipment, the core network equipment determines that the UE is legal.

Optionally, when there are multiple sessions capable of transmitting data on the UE, the context information of the UE includes all transmission path information used for transmitting data, in this case, the first RAN device decrypts the first identifier, which is included in the received first message and encrypted by the first key group, according to the first key group included in the context of the UE, and obtains the transmission path information corresponding to the first identifier after obtaining the plaintext of the first identifier.

Optionally, the identifier of the core network device may be carried in the identifier of the UE, or may be a separate identifier carried in the first information.

Therefore, after the first RAN device stores the received context information of the UE, when the UE in the Idle state has data transmission, the first RAN device may acquire the transmission path information of the data of the UE from the stored context information of the UE, so that signaling overhead in the data transmission process can be reduced, and data transmission efficiency is improved.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the sending the second message to the core network device includes: and when the first RAN equipment determines that the context information of the UE is not stored according to the identity of the UE, the first RAN equipment sends the second message to the core network equipment.

With reference to the first aspect, in a third possible implementation manner of the first aspect, before the first RAN device receives the first message sent by the UE, the method further includes: the first RAN equipment receives the UE identification sent by the UE; the first RAN device sends feedback information to the UE, where the feedback information is used to indicate that the first RAN device determines, according to the identity of the UE, whether a determination result of the context information of the UE is stored, so that the UE requests a core network device to send the context information of the UE to the first RAN device when the feedback information indicates that the first RAN device does not store the context information of the UE, where the context information of the UE includes the first identity and transmission path information corresponding to the first identity;

Wherein, the determining, by the first RAN device, the transmission path information of the data according to the first identifier includes: the first RAN device determines the transmission path information corresponding to the first identifier as the transmission path information of the data.

Optionally, an implementation manner of the UE requesting the core network device to send the context information of the UE to the first RAN device is: the UE sends a request message to the core network equipment through the first RAN equipment, wherein the request message is used for requesting the core network equipment to send the context information of the UE to the first RAN equipment.

Optionally, the context information of the UE sent by the core network device to the first RAN device includes a key, and the first RAN device generates a key for encryption and/or integrity protection between the UE and the first RAN device according to the key included in the context information, and sends the key to the UE.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, before the first RAN device receives the first message sent by the UE, the method further includes: the first RAN equipment receives the UE identification sent by the UE; the first RAN equipment sends feedback information to the UE, wherein the feedback information is used for indicating the first RAN equipment to judge whether a judgment result of context information of the UE is stored or not according to the identity of the UE; when the feedback information indicates that the first RAN device does not store the context information of the UE, the first RAN device receives a third message sent by the UE, where the third message includes an identifier of the UE, the first identifier encrypted by a second key group, and an identifier of a core network device; the first RAN device sends, to the core network device, a fourth message according to the identifier of the core network device, where the fourth message includes the identifier of the UE and the first identifier encrypted by the second key group, so that the core network device sends, to the first RAN device, context information of the UE after verifying that the UE is legitimate according to the identifier of the UE and the first identifier encrypted by the second key group, where the context information of the UE includes the first identifier and transmission path information corresponding to the first identifier;

Wherein, the determining, by the first RAN device, the transmission path information of the data according to the first identifier includes: the first RAN device determines transmission path information corresponding to the first identifier as transmission path information of the data.

It should be noted that the second key set is a Non Access Stratum (NAS) key set between the UE and the core network device.

With reference to the first aspect, in a fifth possible implementation manner of the first aspect, the receiving, by the first radio access network RAN device, a first message sent by a user equipment UE, where the first message includes data and a first identifier, includes: the first RAN device receives the first message sent by the UE, where the first message includes the data encrypted by the first key group, the first identifier encrypted by the first key group, the identifier of the UE, and an identifier of the second RAN device, and the second RAN device is a RAN device determined by the UE and storing context information of the UE;

wherein, the determining, by the first RAN device, the transmission path information of the data according to the first identifier includes: when the first RAN device determines that the context information of the UE is not stored according to the identity of the UE, the first RAN device sends a fifth message to the second RAN device according to the identity of the second RAN device, where the fifth message includes the identity of the UE and the first identity encrypted by the first key group, so that the second RAN device sends the context information of the UE to the first RAN device after determining that the UE is legal according to the identity of the UE and the first identity encrypted by the first key group, and the context information of the UE includes the first key group, the first identity, and transmission path information corresponding to the first identity; the first RAN device determines the transmission path information corresponding to the first identifier as the transmission path information of the data.

That is, when the first RAN device does not store the context information of the UE, the first RAN device may request the RAN device where the UE last resided for the UE, and obtain the transmission path information of the data of the UE from the requested UE context information.

Optionally, the identity of the second RAN apparatus may be carried in the identity of the UE, or may be a separate identity carried in the first information.

Optionally, when the first RAN device determines that the context information of the UE is not stored, the UE may first request the RAN device where the UE resides last time according to the method in the fifth possible implementation manner of the first aspect, and if the request fails, the UE requests the core network device for the context information of the UE according to the method in the second possible implementation manner of the first aspect.

With reference to the first aspect, in a sixth possible implementation manner of the first aspect, the receiving, by the first radio access network RAN device, a first message sent by a user equipment UE, where the first message includes data and a first identifier, includes: the first RAN device receives the first message sent by the UE, where the first message includes the data encrypted by the first key group, the first identifier encrypted by the first key group, and context information of the UE encrypted by a public key of the first RAN device, where the context information of the UE includes the first key group, and before the first RAN device receives the first message sent by the UE, the method further includes: the first RAN equipment receives the UE identification sent by the UE; the first RAN device sends feedback information to the UE, where the feedback information is used to instruct the first RAN device to determine, according to the identity of the UE, whether the determination result of the context information of the UE is stored, so that when the feedback information indicates that the first RAN device does not store the context information of the UE, the UE encrypts the context of the UE by using the public key of the first RAN device.

Wherein, the determining, by the first RAN device, the transmission path information of the data packet according to the first identifier includes: the first RAN equipment decrypts the context information of the UE by adopting a private key corresponding to the public key, and acquires the first key group included in the context information of the UE; the first RAN device decrypts the first identifier encrypted by the first key group by using the first key group to obtain the first identifier; and the first RAN equipment determines the transmission path information of the data according to the corresponding relation between the first identifier and the transmission path information.

Specifically, the UE may receive a public key of the first RAN device in the system broadcast message, and encrypt context information of the UE using the public key. The first RAN equipment stores the corresponding relation between the first identification and the transmission path information, the first RAN equipment can acquire the first key group after decrypting the context of the UE encrypted by using the public key group according to a private key, the first RAN equipment decrypts the received data encrypted by using the first key group and the received first identification encrypted by using the first key group, and the transmission path information of the data can be determined according to the corresponding relation between the decrypted first identification and the transmission path information.

Optionally, the context information of the UE includes the first key group, the first identifier, and a correspondence between the first identifier and the transmission path information, so that the first RAN device may directly obtain the transmission path information of the data of the UE from the context information of the UE.

Optionally, after receiving the context information of the UE, the first RAN device may store the context information of the UE for a period of time, for example, when the UE enters an Idle state in the first RAN device, the first RAN device starts a Timer (Timer) corresponding to the context information of the UE, when the Timer expires, the first RAN device deletes the stored context information of the UE, and when the UE has data to receive or send, the first RAN device resets the Timer, so as to ensure that the context information of the UE does not expire in the process of data transmission, and improve the efficiency of data transmission.

With reference to the first aspect, in a seventh possible implementation manner of the first aspect, context information of the UE is stored in both the first RAN device and the UE, where the context information of the UE includes a first key group, the first identifier, and transmission path information corresponding to the first identifier, and before the first RAN device receives the first message sent by the UE, the method further includes: the first RAN device receives a sixth message sent by the UE, where the sixth message is used to request the first RAN device to recover the signaling connection between the first RAN device and the UE; the first RAN device sends a seventh message to the UE, where the seventh message is used to indicate that the signaling connection between the first RAN device and the UE is recovered, so that the UE encrypts the data and the first identifier by using the first key group after receiving the seventh message;

Or, it may be understood that the UE is in a Suspend (Suspend) state in the first RAN device, and when the UE has data to send and the UE determines that the first RAN device is a RAN device when the UE enters the Suspend state, and a Timer corresponding to context information of the UE stored in the first RAN device is not timeout, the UE sends a request message to the first RAN device to request the first RAN device to recover a signaling connection between the first RAN device and the UE, so that the first RAN device recovers the signaling connection between the first RAN device and the UE after receiving the request message, and the UE sends the data to the first RAN device through the recovered signaling connection.

With reference to the first aspect or any one of the first to seventh possible implementation manners of the first aspect, in an eighth possible implementation manner of the first aspect, before the first RAN device forwards the data according to the transmission path information of the data, the method further includes: the first RAN device obtains a second identifier of the UE, where the second identifier is used for determining, when the first RAN device receives downlink data, that a target receiving device of the downlink data is the UE;

Wherein, the first RAN device forwards the data according to the transmission path information of the data, including: the first RAN equipment determines next hop forwarding equipment of the data according to the transmission path information of the data; the first RAN device sends the data and the second identity to the next hop forwarding device.

Optionally, the second Identifier uniquely identifies the UE at the first RAN device side, or the second Identifier uniquely identifies a bearer of the UE at the first RAN device side, for example, the second Identifier is a Tunnel Endpoint Identifier (TEID) allocated by the first RAN device to the UE.

Therefore, the first RAN equipment can send the data and the second identification to the next hop sending equipment of the data at the same time, and signaling overhead can be further saved.

With reference to the first aspect or any one of the first to eighth possible implementation manners of the first aspect, in a ninth possible implementation manner of the first aspect, the transmission path information of the data includes: address information of a next hop forwarding device of the data; or, address information of a next forwarding device of the data and a third identifier allocated to the UE by the next forwarding device, where the third identifier is used for determining that the data belongs to the UE after the next forwarding device receives the data sent by the first RAN device.

Optionally, the third identifier uniquely identifies the UE in the core network device, or the third identifier uniquely identifies a bearer of the UE on the core network device side.

Optionally, in all possible implementation manners described above, the first message sent by the UE to the first RAN device is a Radio Resource Control (RRC) message.

Optionally, in all possible implementations described above, a specific implementation manner of forwarding data by the first RAN device is as follows: the first RAN device generates a General Packet Radio Service Tunnel Protocol (GTP), a Protocol Data Unit (PDU), and the GTP PDU includes Data and the third identifier.

Optionally, the third identity is carried in an Extended header of the GTP-PDU.

In a second aspect, a method for transmitting data is provided, including: the method comprises the steps that User Equipment (UE) determines a first identifier corresponding to data, wherein the first identifier is used for determining transmission path information of the data according to the first identifier by RAN equipment; the UE sends a first message to the first RAN device, where the first message includes the data and the first identifier.

Therefore, according to the method for transmitting data in the embodiment of the present application, when the user equipment UE sends data to the first RAN equipment, the first identifier is sent to the first RAN equipment at the same time, so that the first RAN equipment obtains the transmission path information of the data of the UE according to the first identifier, and therefore, when the UE in an idle state has a data transmission requirement, it is not necessary to reestablish the user plane connection between the UE and the RAN equipment, the signaling connection between the RAN equipment and the control plane equipment in the core network equipment, and the user plane connection between the RAN equipment and the user plane equipment in the core network equipment, which can reduce the signaling overhead in the data transmission process and improve the efficiency of transmitting data.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the method further includes: the UE encrypts the data and the first identifier by using a first secret key group;

wherein, the UE sends a first message to the first RAN device, where the first message includes the data and the first identifier, and includes: the UE sends a first message to the first RAN device, where the first message includes the data encrypted by the UE using the first key group, the first identifier encrypted by the UE using the first key group, an identifier of the UE, and an identifier of a core network device, so that the first RAN device obtains context information of the UE according to the identifier of the UE, the identifier of the core network device, and the first identifier encrypted by the UE using the first key group, and the context information of the UE includes the first key group, the first identifier, and transmission path information corresponding to the first identifier.

With reference to the second aspect, in a second possible implementation manner of the second aspect, before the UE sends the first message to the first RAN device, the method further includes: the UE sends the identity of the UE to the first RAN equipment; the UE receives feedback information sent by the first RAN device, where the feedback information is used to instruct the first RAN device to determine, according to an identifier of the UE, whether a determination result of context information of the UE is stored, where the context information of the UE includes the first identifier and transmission path information corresponding to the first identifier; when the feedback information indicates that the first RAN device does not store the context information of the UE, the UE sends a second message to the core network device, where the second message is used to request the core network device to send the context information of the UE to the first RAN device.

With reference to the second aspect, in a third possible implementation manner of the second aspect, before the UE sends the first message to the first RAN device, the method further includes: the UE sends the identity of the UE to the first RAN equipment; the UE receives feedback information sent by the first RAN device, where the feedback information is used to instruct the first RAN device to determine, according to the identifier of the UE, whether a determination result of context information of the UE is stored; when the feedback information indicates that the first RAN device does not store the context information of the UE, the UE sends a third message to the first RAN device, where the third message includes an identifier of the UE, the first identifier encrypted by a second key group, and an identifier of a core network device, so that the first RAN device obtains the context information of the UE according to the identifier of the UE, the first identifier encrypted by the second key group, and the identifier of the core network device, and the context information of the UE includes the first identifier and transmission path information corresponding to the first identifier.

With reference to the second aspect, in a fourth possible implementation manner of the second aspect, the method further includes: the UE encrypts the data and the first identifier by using a first secret key group;

wherein, the UE sends a first message to the first RAN device, where the first message includes the data and the first identifier, and includes: the UE sends a first message to the first RAN device, where the first message includes the data encrypted by the UE using the first key group, the first identifier encrypted by the UE using the first key group, an identifier of the UE, and an identifier of a second RAN device, and the second RAN device determines, for the UE, a RAN device that stores context information of the UE, so that the first RAN device obtains the context information of the UE according to the identifier of the UE, the first identifier encrypted by the UE using the first key group, and the identifier of the second RAN device, and the context information of the UE includes the first key group, the first identifier, and transmission path information corresponding to the first identifier.

With reference to the second party, in a fifth possible implementation manner of the second aspect, the method further includes: the UE sends the identity of the UE to the first RAN equipment; the UE receives feedback information sent by the first RAN device, where the feedback information is used to instruct the first RAN device to determine whether a determination result of context information of the UE is stored according to the identifier of the UE. When the feedback information indicates that the first RAN device does not store the context information of the UE, the UE encrypts the context of the UE using the public key of the first RAN device, where the context information of the UE includes a first key group;

Wherein, the UE sends a first message to the first RAN device, where the first message includes the data and the first identifier, and includes: the UE sends a first message to the first RAN device, where the first message includes the data encrypted by the UE using the first key group, the first identifier encrypted by the UE using the first key group, and context information of the UE encrypted by the UE using a public key of the first RAN device, so that the first RAN device obtains transmission path information of the data according to the context information of the UE.

With reference to the second aspect, in a sixth possible implementation manner of the second aspect, both the first RAN device and the UE store context information of the UE, where the context information of the UE includes a first key group, the first identifier, and transmission path information corresponding to the first identifier, and before the UE sends the first message to the first RAN device, the method further includes: the UE sending a fourth message to the first RAN device, the fourth message being used to request the first RAN device to recover the connection between the UE and the first RAN device; the UE receives a fifth message sent by the first RAN device, where the fifth message is used to indicate that the connection between the UE and the first RAN device is restored.

Wherein the UE sending a first message to the first RAN device includes: the UE sends the first message to the first RAN device over the connection.

It may be appreciated that the first RAN device restoring the connection between the UE and the first RAN device may be the first RAN device restoring a signaling connection between the UE and the first RAN device, or may be the first RAN device restoring a signaling connection and a data connection between the UE and the first RAN device.

With reference to the sixth possible implementation manner of the second aspect, in a seventh possible implementation manner of the second aspect, before the UE sends the fourth message to the first RAN device, the method further includes: the UE sending a sixth message to the first RAN device, where the sixth message is used to instruct the first RAN device to set the UE to a suspended state; the UE receives a seventh message sent by the first RAN device, where the seventh message is used to indicate that the first RAN device has set the UE in a suspended state.

With reference to the seventh possible implementation manner of the second aspect, in an eighth possible implementation manner of the second party, the sending, by the UE, a sixth message to the first RAN device includes: when the UE determines that the moving range of the UE within the preset time period is within the preset range, the UE sends the sixth message to the first RAN device.

The preset time period may be set according to the needs of the user, for example, the preset time period may be set to 8 am to 5 pm, and the preset range may also be set according to the actual situation of the user, for example, the preset range may be set to an area within 100 m of a square circle with the work place of the user as the center.

With reference to the second aspect, in a ninth possible implementation manner of the second aspect, the transmission path information of the data includes: address information of a next hop forwarding device of the data, or address information of the next hop forwarding device of the data and a third identifier allocated to the UE by the next hop forwarding device, where the third identifier is used for determining that the data belongs to the UE after the next hop forwarding device receives the data sent by the first RAN device.

In a third aspect, a method for transmitting data is provided, including: receiving data sent by User Equipment (UE) through a Data Radio Bearer (DRB) by Radio Access Network (RAN) equipment; the RAN equipment determines the transmission path information of the data according to the corresponding relation between the DRB and the transmission path information; the RAN device obtains a first identifier of the UE, where the first identifier is used for determining, when the RAN device receives downlink data, that a target receiving device of the downlink data is the UE; and the RAN equipment sends the data and the first identifier of the UE to next hop forwarding equipment of the data according to the transmission path information of the data.

Therefore, according to the data transmission method of the present application, the RAN device sends the first identifier of the UE to the next-hop forwarding device while sending data to the next-hop forwarding device that receives the data of the UE, and since the first identifier can be used to determine that the destination receiving device of the downlink data is the UE when the RAN device receives the downlink data, signaling overhead in the data transmission process can be saved, and efficiency of data transmission is improved.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the RAN device and the UE both store context information of the UE, where the context information of the UE includes a key group, the first identifier, and transmission path information corresponding to the first identifier, and before the RAN device receives data sent by the UE, the method further includes: the RAN device receives a first message sent by the UE, where the first message is used to request the RAN device to recover the DRB and the signaling connection between the RAN device and the UE; the RAN equipment sends a second message to the UE, where the second message is used to indicate that the signaling connection between the RAN equipment and the UE and the DRB is recovered.

With reference to the third aspect, in a second possible implementation manner of the third aspect, before the RAN device receives the data packet sent by the UE, the method further includes: the RAN device receives a third message sent by a core network device, where the third message includes context information of the UE, and the context information of the UE includes transmission path information corresponding to the DRB;

The method for receiving data sent by User Equipment (UE) through a Data Radio Bearer (DRB) by the RAN equipment includes: the RAN equipment establishes the DRB with the UE according to the context information of the UE; the RAN device receives data transmitted by the UE through the DRB.

With reference to the third aspect, or the first or second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the transmission path information of the data includes: address information of a next hop forwarding device of the data; or, address information of a next forwarding device of the data and a second identifier allocated to the UE by the next forwarding device, where the second identifier is used for determining that the data belongs to the UE after the next forwarding device receives the data sent by the first RAN device.

In a fourth aspect, a method for transmitting data is provided, including: user Equipment (UE) sends a first message to Radio Access Network (RAN) equipment, wherein the first message is used for requesting the RAN equipment to set the UE in a suspension state; the UE device receives a second message sent by the RAN device, where the second message is used to indicate that the RAN device has set the UE in a suspended state, so that when the UE sends data to the RAN device, the UE requests the RAN device to resume a connection between the UE and the RAN device, and sends data to the RAN device through the connection.

Therefore, according to the data transmission method, the UE requests the RAN equipment to set the UE in a suspended state, and therefore when the UE needs to send data, the UE can request the RAN equipment to directly recover the connection between the RAN equipment and the UE, signaling overhead can be saved, and data transmission efficiency is improved.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the sending, by the UE, the first message to the RAN device includes: the UE determines whether the movement range of the UE in a preset time period is within a preset range; when the UE determines that the moving range of the UE in the time period with the equipment is within a preset range, the UE sends the first message to the RAN equipment.

Optionally, in all the above possible implementations, the data sent by the UE is small data, the small data is usually an instant message, for example, a heartbeat packet of a wechat application, and the size of the small data is generally less than 20 k.

In a fifth aspect, a radio access network RAN apparatus is provided, configured to perform the method of the first aspect or any possible implementation manner of the first aspect. In particular, the RAN apparatus comprises means for performing the method of the first aspect described above or any possible implementation manner of the first aspect.

A sixth aspect provides a user equipment configured to perform the method of the second aspect or any possible implementation manner of the second aspect. In particular, the user equipment comprises means for performing the method of the second aspect or any possible implementation of the second aspect.

In a seventh aspect, a radio access network RAN apparatus is provided, configured to perform the method in the third aspect or any possible implementation manner of the third aspect. In particular, the RAN apparatus comprises means for performing the method of the third aspect or any possible implementation manner of the third aspect.

In an eighth aspect, a user equipment is provided for executing the method in the fourth aspect or the method in any possible implementation manner of the fourth aspect, and specifically, the user equipment includes a unit for executing the method in the fourth aspect or any possible implementation manner of the fourth aspect.

In a ninth aspect, a radio access network RAN apparatus is provided, comprising: a processor, a memory, and a transceiver, where the processor, the memory, and the transceiver are connected via a bus system, the memory is configured to store instructions, and the processor is configured to execute the instructions stored in the memory to control the transceiver to receive and transmit information, so that the RAN device performs the method in the first aspect or any possible implementation manner of the first aspect.

In a tenth aspect, there is provided a user equipment comprising: a processor, a memory and a transceiver, the processor, the memory and the transceiver being connected by a bus system, the memory being configured to store instructions, and the processor being configured to execute the instructions stored in the memory to control the transceiver to receive and transmit information, such that the user equipment performs the method of the second aspect or any possible implementation manner of the second aspect.

In an eleventh aspect, a radio access network RAN apparatus is provided, comprising: a processor, a memory and a transceiver, the memory, the receiver and the transceiver being connected by a bus system, the memory being configured to store instructions, the processor being configured to execute the instructions stored in the memory to control the transceiver to receive information and transmit information, such that the RAN apparatus performs the method of any possible implementation of the third aspect or the third aspect.

In a twelfth aspect, a user equipment is provided, including: a processor, a memory, and a transceiver, the processor, the memory, and the transceiver are connected via a bus system, the memory is used for storing instructions, and the processor is used for executing the instructions stored in the memory to control the transceiver to receive and transmit information, so that the user equipment performs the method in any possible implementation manner of the fourth aspect or the fourth aspect.

In a thirteenth aspect, there is provided a computer readable medium for storing a computer program comprising instructions for performing the method of the first aspect or any possible implementation manner of the first aspect.

A fourteenth aspect provides a computer readable medium for storing a computer program comprising instructions for performing the method of the second aspect or any possible implementation of the second aspect.

In a fifteenth aspect, a computer-readable medium is provided for storing a computer program comprising instructions for performing the method of the third aspect or any possible implementation of the third aspect.

In a sixteenth aspect, there is provided a computer readable medium for storing a computer program comprising instructions for performing the method of the fourth aspect or any possible implementation manner of the fourth aspect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart diagram of a method of transmitting data in accordance with an embodiment of the present invention;

fig. 3 is a schematic flow chart of a method of establishing a packet data unit session according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart diagram of a method of transmitting data in accordance with an embodiment of the present invention;

FIG. 5 is a schematic flow chart diagram of a method of transmitting data in accordance with another embodiment of the present invention;

FIG. 6 is a schematic flow chart diagram of a method of transmitting data in accordance with yet another embodiment of the present invention;

FIG. 7 is a schematic flow chart diagram of a method of transmitting data in accordance with yet another embodiment of the present invention;

FIG. 8 is a schematic flow chart diagram of a method of transmitting data in accordance with yet another embodiment of the present invention;

fig. 9 is a schematic flow chart diagram of a method of establishing a packet data unit session according to another embodiment of the present invention;

FIG. 10 is a schematic flow chart diagram of a method of transmitting data in accordance with yet another embodiment of the present invention;

FIG. 11 is a schematic flow chart diagram of a method of transmitting data in accordance with yet another embodiment of the present invention;

FIG. 12 is a schematic flow chart diagram of a method of transmitting data in accordance with yet another embodiment of the present invention;

Fig. 13 is a schematic block diagram of a RAN apparatus according to an embodiment of the present invention;

FIG. 14 is a schematic block diagram of a user equipment according to an embodiment of the present invention;

fig. 15 is a schematic block diagram of a RAN arrangement according to another embodiment of the present invention;

FIG. 16 is a schematic block diagram of a user equipment according to another embodiment of the present invention;

FIG. 17 is another schematic block diagram of a user equipment according to another embodiment of the present invention;

fig. 18 is a schematic block diagram of a RAN apparatus according to yet another embodiment of the present invention;

FIG. 19 is a schematic block diagram of a user equipment according to yet another embodiment of the present invention;

FIG. 20 is a schematic flow chart diagram of a method of transmitting data in accordance with yet another embodiment of the present invention;

FIG. 21 is a schematic flow chart diagram of a method of transmitting data in accordance with yet another embodiment of the present invention;

FIG. 22 is a schematic flow chart diagram of a method of transmitting data in accordance with yet another embodiment of the present invention;

FIG. 23 is a schematic flow chart diagram of a method of transmitting data according to yet another embodiment of the present invention

FIG. 24 is a schematic block diagram of a user equipment according to yet another embodiment of the present invention;

FIG. 25 is a schematic block diagram of a user equipment according to yet another embodiment of the present invention;

FIG. 26 is a schematic block diagram of a user equipment according to yet another embodiment of the present invention;

Fig. 27 is a schematic block diagram of a core network device according to an embodiment of the present invention;

FIG. 28 is a schematic block diagram of an access network apparatus according to an embodiment of the present invention;

fig. 29 is a schematic block diagram of an access network apparatus according to an embodiment of the present invention;

FIG. 30 is a schematic block diagram of a user equipment according to yet another embodiment of the present invention;

fig. 31 is a schematic block diagram of a core network apparatus according to another embodiment of the present invention;

fig. 32 is a schematic block diagram of an access network apparatus according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

The technical scheme of the embodiment of the invention can be applied to various communication systems, such as: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a Long Term Evolution (LTE) System, a Frequency Division Duplex (FDD) System, a Time Division Duplex (TDD) System, a Universal Mobile Telecommunications System (UMTS), and a future 5G Communication System.

In the embodiment of the present invention, a User Equipment (User Equipment, abbreviated as "UE") may also be referred to as a Terminal device, a Mobile Station (Mobile Station, abbreviated as "MS"), a Mobile Terminal (Mobile Terminal), and the like, where the User Equipment may communicate with one or more core networks through a Radio Access Network (RAN "), for example, the User Equipment may be a Mobile phone (or a" cellular "phone), a computer with a Mobile Terminal, and the like, and for example, the User Equipment may be a portable, pocket, hand-held, computer-built or vehicle-mounted Mobile device, a Terminal device in a future 5G Network, a Terminal device in a future evolved PLMN Network, and the like. It will be appreciated that the user equipment may also be a chip with communication functionality within the above-mentioned device (mobile phone, computer with mobile terminal, etc.).

In the embodiment of the present invention, a Radio Access Network (RAN) device may correspond to a base station in an existing communication system and a Network side device in a future 5G Network.

Fig. 1 illustrates a schematic diagram of an architecture of a communication system according to an embodiment of the present invention, as illustrated in fig. 1, the communication system includes a User equipment UE, a RAN device, a core Network, an Application Function entity (Application Function, abbreviated as "AF"), and a Data Network (Data Network, abbreviated as "DN"), where the core Network includes a Control Plane device (CP Function ") and a User Plane device (UP Function"). It should be noted that the control plane device may also be referred to as a "control plane entity", and the user plane device may also be referred to as a "user plane entity".

As shown in fig. 1, the UE is interfaced with the CP Function through an NG1 interface, the RAN is interfaced with the CP Function through an NG2 interface, the RAN is interfaced with the UP Function through an NG3 interface, the CP Function is interfaced with the UP Function through an NG4 interface, the CP Function is interfaced with the AF through an NG5 interface, and the UP Function is interfaced with the DN through an NG6 interface.

In the communication system shown in fig. 1, the CP Function stores context information of the UE, performs validity verification on the UE, performs mobility management and session management on the UE, and transmits a control signaling between the UE and the CP Function through a control plane. The UP Function is used for forwarding data of the UE, and data of an upper layer application is transmitted between the UE and the UP Function through a user plane. The application function entity is used to determine the Quality of Service (QoS) that the UE can use, and DN refers to an Internet network (Internet) network other than the operator network.

Fig. 1 shows one UP Function merely for example, in a normal case, a core network includes multiple UP functions, and it is assumed that the core network includes 2 UP functions, which are UP Function1 and UP Function2, during a process of sending data, a Tunnel (Tunnel) connection is always reserved between UP Function1 and UP Function2 for a UE, and after the UP Function1 receives data sent by a RAN device, it may be determined according to a target Tunnel Endpoint Identifier (Tunnel Endpoint Identifier, abbreviated as "TEID") in the data, which UE sends the data, and send the data to UP Function2 through the Tunnel existing in the UE. Or, UP Function1 and UP Function2 do not need to maintain a Tunnel connection for the UE all the time, and at this time, after receiving the data sent by the RAN device, UP Function1 may determine the address of UP Function2 according to other information and send the data to UP Function 2.

It should be noted that in describing particular embodiments of the present invention, the following description of determining B according to a should be understood as: b may be determined based on a alone when determining B, or may be determined based on a as well as other conditions (or information) when determining B.

Fig. 2 shows a schematic flow diagram of a method of transmitting data according to an embodiment of the invention. As shown in fig. 2, the method 100 includes:

s110, user equipment UE sends a first message to RAN equipment, wherein the first message comprises data and a first identifier;

s120, the RAN equipment determines transmission path information of the data according to the first identification;

s130, the RAN device forwards the data to the transmission path information according to the data.

For example, as shown in fig. 2, the RAN device determines that the next hop forwarding device of the data is the UP Function according to the transmission path information of the data, and the RAN device sends the received data to the UP Function. If there are multiple user plane devices in the core network, the user plane device receiving the data sent by the RAN device may forward the data to other user plane devices according to the method described above.

The method for transmitting data according to the embodiment of the present invention will be described in detail with reference to specific examples, and it should be noted that, in describing the specific embodiments, data to be transmitted in the UE is described as small data, but it can be understood that the method according to the embodiment of the present invention is also applicable to a non-small data transmission scenario. Wherein the small data is usually an instant message, such as a heartbeat packet of a wechat application, and the size of the small data is generally less than 20 k.

In describing the specific embodiment, a Key (Key) is taken as an encryption Key as an example for description, but it is understood that the Key in the embodiment of the present invention also includes a Key for integrity protection, or it is understood that: the key in embodiments of the present invention is actually a "key set" that includes encryption keys and/or integrity protected keys.

First, a method for establishing a Packet Data Unit (PDU) Session (Session) according to an embodiment of the present invention is described in detail with reference to fig. 3, where fig. 3 is a schematic flowchart for establishing a PDU Session according to an embodiment of the present invention, and as shown in fig. 3, the method 200 includes:

s210, attaching (Attach) the UE to the CP Function;

in this process, the UE sends an Attach Request (Attach Request) message to the CP Function, and then the CP Function replies an Attach Accept (Attach Accept) message to the UE, where the Attach Accept message carries an identifier ID allocated by the CP Function for the UE, and the UE ID is used to uniquely identify the UE in the control plane.

S220, UE sends a Session establishment Request (Session establishment Request) message to CP Function to Request the establishment of PDU Session;

as an optional example, but not by way of limitation, the Session establishment Request message may carry Small Data Indication (Small Data Indication) information, where the Small Data Indication information is used to indicate that the UE has a Small Data transmission capability, or the UE may use the PDU Session to transmit Small Data, or the UE needs to transmit Small Data.

S230, the CP Function sends a Create Session Request (Create Session Request) message to the UP Function1, and requests the UP Function1 to establish a PDU Session;

as an optional example, but not limited to, a Small Data Indication may be carried in the Create Session Request message, and the UP Function1 allocates a Tunnel Endpoint identifier (Tunnel Endpoint ID, abbreviated as "TEID") used for Small Data transmission to the UE, where the TEID uniquely identifies the UE in the UP Function1, or the TEID uniquely identifies one user plane bearer of the UE in the UP Function1, or the TEID uniquely identifies one Data Flow (Data Flow) of the UE in the UP Function 1. For the convenience of the subsequent description, this TEID is referred to as "UP 1-TEID". The understanding of the UP 1-TEID here applies equally to other embodiments of the present invention.

S240, establishing PDU Session between UP Function1 and UP Function 2;

UP Function1 sends a Create Session Request message to UP Function2, UP Function2 sends a Create Session Response message to UP Function1, thereby establishing a PDU Session between UP Function1 and UP Function 2. It is understood that when only the UP Function1 exists in the core network, the step S240 is omitted.

S250, the UP Function1 sends a Create Session Response (Create Session Response) message to the CP Function;

optionally, the Create Session Response message carries the TEID allocated by the UP Function1 to the UE in S230.

S260, the CP Function generates a Path information identifier (Data Path ID);

the CP Function stores the corresponding relationship between the Data Path ID and the IP address and UP 1-TEID of the UP Function 1.

S270, the CP Function sends a message to the RAN equipment;

specifically, the message sent by the CP Function to the RAN device includes a Session establishment Response (Session establishment Response) message sent by the CP Function to the UE and context information of the UE, where the Session establishment Response message carries a Data Path ID generated by the CP Function for the UE in S260, and the context information of the UE includes: the CP Function is the Data Path ID, UE ID, Key Key, and UP Function1 address and UP-1 TEID generated by UE. The Data Path ID has a one-to-one correspondence with the UP Function1 address and the UP-1 TEID.

Optionally, the context information of the UE includes: data Path ID, UE ID, Key, IP address of UP Function1, and IP address of UP Function 2. The understanding of the context information of the UE in this method applies to other embodiments of the invention.

Also, keys include encryption keys and/or integrity protected keys, and the understanding of keys is equally applicable to other embodiments of the present invention.

S280, the RAN equipment stores the UE ID, the Key corresponding to the UE, the IP address of UP Function1 corresponding to the Data Path ID and the UP-1 TEID in the context information of the UE;

alternatively, if the context information of the UE includes the UE ID, the Key, and the IP address of the UP Function1 and the IP address of the UP Function 2 corresponding to the Data Path ID in S270. In S280, the RAN stores the correspondence between the Data Path ID and the IP addresses of the UP Function1 and the UP Function 2.

It should be noted that, after the UE enters the Idle state in the RAN device, the RAN device starts a Timer (Timer) corresponding to the stored corresponding relationship, and if the Timer is overtime, the RAN device deletes the stored corresponding relationship, and if the UE has uplink or downlink data, the RAN device resets the Timer to ensure that the Timer is not overtime in the uplink or downlink data transmission process.

S290, the RAN device sends an RRC message to the UE, where the RRC message carries a Session establishment Response message included in the message received in S270.

After a PDU Session is established for a UE, the UE may perform data transmission with a network, and a method for transmitting data according to an embodiment of the present invention will be described in detail below with reference to fig. 4, where fig. 4 is a schematic flowchart of a method for uplink data transmission according to an embodiment of the present invention, and in the method 300 shown in fig. 4, a Key sent by a CP Function to the UE may be a Key for small data allocated by the CP Function to the UE, and the Key for small data may not change due to the RAN device replacement by the UE. As shown in fig. 4, the method 300 includes:

S310, the UE sends RRC information to the RAN equipment, wherein the RRC information comprises a UE ID, encrypted small Data and an encrypted Data Path ID;

it can be understood that, after the UE enters the Idle state in the RAN device, if the UE has small Data to send, the UE uses the Key to encrypt the small Data to be sent and the Data Path ID respectively. Specifically, the UE may determine whether the data is small data according to the size of data transmitted by an Application program (APP), or the APP may indicate that the data transmitted by a Modem (Modem) of the UE is small data through a Tag (Tag) when the data is transmitted.

It should be noted that, if a Data Radio Bearer (DRB) exists between the UE and the RAN device, the UE directly sends small Data to the RAN device through the DRB without sending the Data Path ID after encryption processing and without performing the related steps of uplink Data sending in the method 300.

S320, the RAN equipment checks whether context information of the UE is stored or not according to the UE ID of the UE; if yes, decrypting the Data Path ID by using the Key of the UE, obtaining the IP address of the UP Function 1 and the UP-1 TEID according to the stored corresponding relation, and then executing S380 and subsequent steps, if not, executing S330 and subsequent steps;

S330, the RAN equipment sends a UE Information Request (Information Request) message to the CP Function, wherein the UE Information Request message comprises a UE ID and a Data Path ID which is encrypted;

optionally, if the UE ID carries the identifier of the CP Function, the RAN device may determine the CP Function according to the identifier of the CP Function in the UE ID, and if the RRC message in S310 independently carries the identifier of the CP Function, the RAN device may determine the CP Function according to the identifier of the CP Function separately carried in the RRC message.

S340, the CP Function determines the legality of the UE, and executes S350 when the UE is determined to be legal;

specifically, the CP Function finds the context information of the UE according to the UE ID, obtains a Key in the context information of the UE, and decrypts the encrypted Data Path ID by using the obtained Key, and if the encrypted Data Path ID can be successfully decrypted by using the obtained Key and the decrypted Data Path ID is consistent with the Data Path ID of the UE stored in the CP Function, the UE is considered to be legal, and obtains the address of the UP Function 1 and the UP-1 TEID corresponding to the Data Path ID.

Optionally, the CP Function also verifies integrity of the Data Path ID, and if the CP Function verifies that the Data Path ID is not tampered and is consistent with the Data Path ID of the UE stored in the CP Function, the UE is considered to be legal.

S350, the CP Function sends a UE Information Response (Information Response) message to the RAN device;

the UE Information Response message includes a Data Path ID, an IP address of UP Function 1, UP1-TEID and Key.

S360, the RAN equipment stores the Key of the UE, the address of the UP Function 1 corresponding to the Data Path ID and the UP1-TEID in the context information of the UE;

s370, the RAN equipment acquires the RAN TEID of the UE and generates a General Packet Radio Service Tunnel Protocol (GTP) PDU;

it should be noted that the RAN TEID refers to a TEID allocated by the RAN device to the UE, and if the UE context information stored in the RAN device includes the RAN TEID, the RAN device acquires the RAN TEID from the UE context information, and if the UE context information does not include the RAN TEID, the RAN device allocates one RAN TEID to the UE.

The GTP PDU generated by the RAN device includes an address of the UP Function 1, UP1-TEID, small data decrypted by Key, an address of the RAN device, and a RAN TEID, where the address of the RAN device and the RAN TEID are carried in an Extended Header (Extended Header) of the GTP PDU, so that when the UP Function 1 has downlink data to be sent to the UE, the downlink data is sent to the RAN device according to the IP address of the RAN device and the RAN TEID, and then the RAN device sends the downlink data to the UE.

Further, after the UE enters the Idle state in the RAN device, the RAN device starts a Timer (Timer) corresponding to the recorded corresponding relationship, and if the Timer is overtime, the RAN device deletes the recorded corresponding relationship, and if the UE has uplink or downlink data, the RAN device resets the Timer to ensure that the Timer is not overtime in the uplink or downlink data transmission process.

S380, the RAN equipment sends GTP PDU to UP Function 1;

s390, the UP Function 1 saves the address of the RAN equipment and the RAN TEID, and sends GTP PDU to the UP Function 2;

optionally, when the UP Function 1 stores the address of the RAN device and the RAN TEID, the corresponding Timer is started, when the Timer is overtime, the UP Function 1 deletes the stored address of the RAN device and the RAN TEID, and when the UP Function 1 receives uplink or downlink data of the UE, the UP Function 1 resets the Timer.

After S390, as shown in fig. 4, the UP Function 2 sends the data in the received GTP PDU to a corresponding APP server (set), then the APP set sends a response message (e.g., ACK in fig. 4) to the UP Function 2, the UP Function 2 sends the response message to the UP Function 1 after receiving the response message, the UP Function 1 obtains the stored address and RAN TEID of the RAN device, generates a downlink GTP PDU and sends the downlink GTP PDU to the RAN device, after receiving the GTP PDU sent by the UP Function 1, the RAN device determines the UE ID according to the RAN TEID, obtains the Key corresponding to the UE according to the UE ID, encrypts the data in the GTP PDU with the obtained Key and sends the encrypted data to the UE through the RRC message, and the UE can decrypt the data with the corresponding Key.

Fig. 5 shows a schematic flow chart of a method of transmitting data according to another embodiment of the invention. The Key in the method shown in fig. 5 may be the same as the Key in the method 300, or may be a K sent by the RAN device to the RAN device based on the CP Function_eNBA Key generated for ciphering and/or integrity protection between the UE and the RAN device. As shown in fig. 5, the method 400 includes:

s410, the UE sends RRC information to the RAN equipment, wherein the RRC information comprises a UE ID, encrypted small Data and an encrypted Data Path ID;

it should be noted that S410 is the same as S310, and is not described herein again to avoid repetition.

S420, the RAN equipment checks whether context information of the UE is stored or not according to the UE ID of the UE; if yes, decrypting the encrypted Data Path ID by using the Key of the UE, obtaining the address of the UP Function 1 and the UP-1 TEID according to the stored corresponding relation, and then executing S370 and subsequent steps in the method 300, if not, executing S430 and subsequent steps;

s430, the RAN equipment sends a UE Information Request (Information Request) message to the RAN equipment where the UE resides last time, wherein the UE Information Request message comprises a UE ID and a Data Path ID which is subjected to encryption processing;

It is understood that the RAN apparatus where the UE last resided in S430 stores the context information of the UE.

Optionally, if the UE ID carries the identifier of the RAN device that resided last time, the RAN device may determine the RAN device that resided last time according to the identifier of the RAN device that resided last time in the UE ID, and if the RRC message in S410 separately carries the identifier of the RAN device that resided last time by the UE, the RAN device may determine the RAN device that resided last time according to the identifier of the RAN device that resided last time by the UE that is separately carried in the RRC message.

S440, the RAN equipment resided by the UE last time determines the legality of the UE, and when the UE is determined to be legal, S450 is executed;

s450, the RAN equipment where the UE resides last sends a UE Information Response message to the RAN equipment;

the UE Information Response message includes the context Information of the UE, and the context Information of the UE includes a Data Path ID decrypted by the RAN equipment which is resided by the UE last time, an IP address of UP Function 1, UP 1-TEID and Key.

S460, executing S360-S390 of the method 300 and the subsequent steps.

In the embodiment of the present invention, optionally, in the process of transmitting data, the RAN device first performs the relevant steps in the method 400 to obtain the context information of the UE from the RAN device where the UE last resided, and if the RAN device fails, obtains the context information of the UE from the CP Function according to the relevant steps in the method 300.

Fig. 6 shows a schematic flow chart of a method of transmitting data according to a further embodiment of the invention. As shown in fig. 6, the method 500 includes:

s510, the UE sends an RRC Connection establishment Request (Connection Request) message to the RAN equipment, wherein the RRC Connection Request message carries Small data Indication and UE ID;

s520, the RAN equipment determines whether context information of the UE is stored or not according to the UE ID, and sends a RRC Connection Setup (Connection Setup) message to the UE, wherein the RRC Connection Setup message carries indication information which is used for indicating whether the context information of the UE is stored or not in the RAN equipment;

s530, the UE determines that the UE context information is not stored in the RAN equipment according to the indication information, and the UE sends a Service Request message to the CP Function;

the Service Request message carries a Small Data Indication, and requests the CP Function to send the context information of the UE to the RAN equipment.

S540, the CP Function determines that the UE is legal, and sends the context information of the UE to the RAN equipment;

the CP Function performs integrity verification on the Service Request message when performing validity verification on the UE, and the specific implementation manner is the same as that in the existing communication standard, and is not described herein again.

As an optional example, the context information of the UE includes: and the Data Path ID subjected to the CP Function decryption processing, the IP address of the UP Function 1, the UP 1-TEID and the Key.

As another optional example, the context information of the UE includes: the Data Path ID, IP address of UP Function 1 and UP 1-TEID that are decrypted by CP Function.

S550, the RAN equipment stores a Key corresponding to the UE ID, and an address and a UP 1-TEID of a UP Function 1 corresponding to a Data Path ID of the UE ID in context information of the UE;

s560, the RAN device sends security-related context information to the UE;

the security-related context information includes an encryption algorithm selected by the RAN device for data transmission between the RAN device and the UE. The understanding of the security-related context information in this embodiment is equally applicable to other embodiments of the present invention.

S570, the UE encrypts the Data and the Data Path ID by using the encryption algorithm in S560 and sends the Data and the Data Path ID to RAN equipment through an RRC message;

s580, the RAN device decrypts the Data Path ID encrypted by the same encryption algorithm, and determines the UP Function 1 according to the corresponding relation between the Data Path ID and the address of the UP Function 1 and the UP 1-TEID;

S590, S370-S390 of the method 300 is performed, and the following steps are performed.

As an optional example, S530 is specifically: UE sends RRC message to RAN equipment, the RRC message includes encrypted Data Path ID, CP Function address and UE ID; and the RAN equipment sends a UE Information Request message to the CP Function according to the address of the CP Function, wherein the UE Information Request message carries the encrypted Data Path ID and the UE ID. Correspondingly, in S540, the method for verifying the validity of the UE by the CP Function is the same as that in S340, and is not described herein again.

In this embodiment of the present invention, in S270 in the method 200 shown in fig. 3, the Session establishment Response message further includes context information of the UE, and after the UE receives an RRC message sent by the RAN device, the context information of the UE included in the RRC message is saved. Fig. 7 illustrates a method of transmitting data according to an embodiment of the present invention in such a scenario. As shown in fig. 7, the method 600 includes:

s610, executing S510-S520 in the method 500;

s620, the UE determines that the UE context information is not stored in the RAN equipment according to the indication information, and the UE sends an RRC message to the RAN equipment;

the RRC message carries context information of the UE encrypted by the UE using the public Key of the RAN device, the UE ID, the Data Path ID of the UE encrypted by the UE using the Key for Data transmission, the Data encrypted by the UE using the Key for Data transmission, and the address of the CP Function.

S630, the RAN equipment decrypts the context information of the UE by using the private Key, acquires a Key for data transmission, and performs decryption operation;

specifically, the Data Path ID encrypted with the Key for Data transmission and the Data encrypted with the Key for Data transmission are decrypted;

optionally, the RAN device side stores a correspondence between the Data Path ID and the address of the UP Function 1, and the context information of the UE does not include the address information of the UP Function 1, that is, the UE does not send the address of the UP Function 1 to the RAN device, and after the RAN device decrypts the Data Path ID encrypted by using the Key for Data transmission, the UP Function 1 is determined according to the correspondence between the Data Path ID and the address of the UP Function 1.

Optionally, the context information of the UE includes an address of the UP Function 1, and at this time, after the RAN device receives the context of the UE, the RAN device may directly determine the UP Function 1 according to the address of the UP Function 1 in the context information of the UE.

Optionally, after the UE enters the Idle state in the RAN device, the RAN device starts a Timer (Timer) corresponding to the context information of the UE, and if the Timer is overtime, the RAN device deletes the recorded context information of the UE, and if the UE has uplink or downlink data, the RAN device resets the Timer to ensure that the Timer is not overtime in the uplink or downlink data transmission process.

S640, S370-S390 of the method 300 are performed, and the following flows are performed.

In this embodiment of the present invention, optionally, in the method 200 for establishing a PDU Session shown in fig. 3, when a deactivation Timer (Inactive Timer) of the UE expires, the RAN device sends a Release message to the UE, where the Release message carries a Resume (Resume) identifier ID and indication information allocated to the UE, and the indication information is used to indicate that a reason for the Release is entering a Suspend (Suspend) state of small data transmission. In this case, the transmission of data may be performed according to the data transmission method illustrated in fig. 8. As shown in fig. 8, method 700 includes:

s710, the UE determines the RAN equipment (or cell) where the UE is still in the Suspend state, and the Timer corresponding to the context information of the UE on the RAN equipment is not overtime;

specifically, if the UE has a small data transmission requirement in the Suspend state, the UE needs to determine whether the RAN device (or cell) where the UE is still in the Suspend state and the Timer corresponding to the context information of the UE on the RAN device are overtime, and if the RAN device where the UE is still in the Suspend state and the Timer corresponding to the context information of the UE on the RAN device is not overtime, S720 is performed;

S720, the UE sends a RRC Connection recovery Request (Connection Resume Request) message to the RAN equipment, wherein the RRC Resume Request message carries a Resume ID (identity) allocated to the UE by the RAN equipment and is used for requesting the RAN equipment to recover the context information of the UE;

s730, the RAN equipment sends RRC Connection Resume information to the UE to inform the UE that the context information of the UE is recovered;

s740, the UE sends a RRC Connection Resume Complete (Connection Resume Complete) message to the RAN device, where the Connection Resume Complete message carries encrypted Data and a Data Path ID;

s750, S580-S590 of the method 500 are performed.

It is understood that if the UE determines that the RAN device (or cell) has been replaced by the UE in S710, or the Timer corresponding to the context information of the UE on the RAN device expires, the data transmission may be implemented by performing S530-590 in the method 500.

In the embodiment of the invention, in the process of establishing the PDU Session, the CP Function is not required to distribute the Data Path ID for the UE. In this case, a method of establishing a PDU Session is as shown in fig. 9. As shown in fig. 9, method 900 includes:

s810, executing S210-S250 in the method 200;

s820, the CP Function stores the information for small data transmission;

The information for small data transmission includes: the address of the UP Function 1 and the TEID (UP 1-TEID) allocated by the UP Function 1 for the UE.

S830, the CP Function sends a message to the RAN equipment through an interface between the CP Function and the RAN equipment;

specifically, the message sent by the CP Function to the RAN device includes a Session establishment Response (Session establishment Response) message sent by the CP Function to the UE, where the Session establishment Response message carries context information of the UE, where the context information of the UE includes: the UE ID, the Key Key and the uplink path information for small data transmission, wherein the uplink path information for small data transmission comprises: the address of the UP Function 1 and the UP-1 TEID.

Optionally, the uplink information for small data transmission is contained in a specific container (container), or the uplink information for small data transmission includes indication information indicating that the uplink information is the uplink information for small data transmission.

Optionally, the context information of the UE includes: UE ID, Key, address of UP Function 1 and IP address of UP Function 2.

S840, DRBs for data transmission are established between the UE and the RAN equipment;

It should be noted that the method for establishing the DRB between the UE and the RAN device is the same as the scheme in the existing communication standard, and is not described herein again.

Optionally, in the process of establishing the DRB, the RAN carries indication information in the reconfiguration message to indicate that the established DRB is used for small data transmission, or carries indication information in a Session establishment Response message in S730 to indicate that the DRB established in S740 is a DRB used for small data transmission, so that the UE may determine that the DRB is a DRB used for small data transmission according to the indication information.

S850, when the inactive timer of the UE is overtime, the RAN equipment sends RRC Connection Release message to the UE;

the RRC Connection Release message carries a Resume ID allocated by the RAN device to the UE and indication information for indicating that the Release reason is entering a Suspend state of small data transmission.

After S850, the RAN device stores the corresponding relationship between the DRB and the uplink path information used for small data transmission, and the UE stores the UE ID, Key, and the DRB.

After the PDU Session is established for the UE according to the method 800, the UE may perform data transmission with the network, and the method for transmitting data according to the embodiment of the present invention will be described in detail below with reference to fig. 10, where fig. 10 is a schematic flowchart of a method for transmitting data according to still another embodiment of the present invention, and as shown in fig. 10, the method 900 includes:

S910, the UE determines the RAN equipment (or cell) where the UE is still in the Suspend state and the Timer corresponding to the UE context information on the RAN equipment is not overtime;

s920, the RAN equipment recovers the signaling connection between the RAN equipment and the UE and the DRB for small data transmission;

specifically, the UE sends an RRC Connection Request message to the RAN device, where the RRC Connection Request message carries a Request ID allocated by the RAN device to the UE, and the RRC Connection Request message is used to Request the RAN device to recover a signaling Connection with the UE and a DRB for small data transmission; then the RAN equipment sends RRC Connection response message to the UE to inform the UE that signaling Connection with the UE and DRB used for small data transmission are recovered, and then the UE sends RRC Connection response Complete message to the RAN equipment.

S930, the UE sends the small data to the RAN device through the DRB for small data transmission;

s940, the UE obtains the uplink path information corresponding to the DRB for small data transmission according to the context information of the UE;

s950, executing S370-S390 of the method 300;

after S950, as shown in fig. 10, the UP Function 2 sends the data in the received GTP PDU to a corresponding APP server (set), then the APP set sends a response message (e.g., ACK in fig. 9) to the UP Function 2, the UP Function 2 sends the response message to the UP Function 1 after receiving the response message, the UP Function 1 obtains the stored address and RAN TEID of the RAN device, generates a downlink GTP PDU and sends the downlink GTP PDU to the RAN device, after receiving the GTP PDU sent by the UP Function 1, the RAN device determines the UE ID according to the RAN TEID, obtains the Key corresponding to the UE according to the UE ID, encrypts the data in the GTP PDU with the obtained Key and sends the encrypted data to the UE through the DRB for small data transmission, and the UE can decrypt the data with the corresponding Key.

Fig. 11 illustrates a method of transmitting data according to still another embodiment of the present invention. The method is suitable for the scenario of creating a PDU Session by using the method shown in fig. 9. As shown in fig. 11, the method 1000 includes:

s1010, the UE in the Suspend state determines that the UE is not in the RAN equipment (or cell) where the UE enters the Suspend state, or the Timer corresponding to the context information of the UE on the RAN equipment where the UE enters the Suspend state is overtime;

s1020, the UE sends a Service Request message to the CP Function;

S1030, the CP Function acquires context information for small data transmission;

the context information for small data transmissions includes: key of UE, UP path information, wherein, the UP path information includes UP Function 1 address and UP 1-TEID;

s1040, the CP Function sends an initial context message to the RAN device, the initial context message includes context information and small data indication information for small data transmission;

s1050, the RAN equipment stores context information used for small data transmission;

s1060, the RAN device sends an RRC Security Mode Command message to the UE, where the RRC Security Mode Command message carries Security-related context information of the UE;

S1070, establishing a DRB for small data transmission between the RAN equipment and the UE;

S1080, execute S930-S950 of the method 900, and the following steps.

A method for transmitting data according to still another embodiment of the present invention, which is applicable in a scenario of setting up a PDU Session using the method shown in fig. 3, will be described in detail with reference to fig. 12. As shown in fig. 12, the method 2000 includes:

s2010, the UP Function 1 receives the downlink data and determines whether the downlink data is small data;

specifically, the UP Function 2 receives data sent by the APP set, a destination address of the data is an address of the UE, the UP Function 2 sends the data to the UP Function 1, and the UP Function 1 may determine whether the data is small data according to the size of the data sent by the APP, or determine whether the downlink data is small data according to a Tag carried when the APP sends the data.

S2020, the UP Function 1 determines that the downlink data is small data, and the UP Function 1 acquires an IP address and a RAN TEID of a RAN device corresponding to the UE, and if the downlink data can be acquired, executes S2110. Otherwise, executing S2030;

s2030, the UP Function 1 sends a Downlink Data Notification (Downlink Data Notification) message to the CP Function, where the Downlink Data Notification message carries a Small Data Indication for notifying the CP Function that the UE has Downlink Data to be received;

S2040, the CP Function sends a Paging message to the UE, wherein the Paging message carries Small Data Indication;

s2050, the UE sends a Service Request message to the CP Function, wherein the Service Request message carries Small Data Indication and requests to enter a connection state;

it should be noted that, in S2500, a request to enter a connected state is made, the CP Function sends only the uplink path information to the RAN device, and the RAN device allocates the TEID to the UE according to the received uplink path information.

S2060, the CP Function sends a Data Path Request (Data Path Request) message to the RAN device, where the Data Path Request message is used to Request the RAN device to allocate a TEID for downlink Data transmission to the UE, and the Data Path Request message includes: small Data Indication, UE ID, Data Path ID, UP Function 1 address and UP 1-TEID;

s2070, the RAN equipment stores a Key corresponding to the UE ID and an IP address and a UP 1-TEID of a UP Function 1 corresponding to a Data Path ID of the UE IE in context information of the UE;

s2080, the RAN device sends a Data Path Response (Data Path Response) message to the CP Function, where the Data Path Response message carries an address of the RAN device and a RAN TEID;

s2090, the CP Function sends a response (ACK) message to the UE for the Service Request message in S2050, for informing the UE that the message sent in S2050 has been received.

S2100, the CP Function sends a Downlink Data Path (Downlink Data Path) message to the UP Function 1, wherein the Downlink Data Path message carries the address of the RAN equipment and the RAN TEID;

s2110, generating a downlink GTP PDU by the UP Function 1 according to the address of the RAN equipment and the RAN TEID, and sending the downlink GTP PDU to the RAN equipment;

s2120, the RAN equipment determines the UE ID according to the RAN TEID, and the downlink data are encrypted by using Key corresponding to the UE;

s2130, the RAN equipment sends an RRC message to the UE, wherein the RRC message carries the encrypted downlink data;

after S2130, the UE transmits the UE ID, the ciphered small Data (ACK), and the ciphered Data Path ID to the RAN through an RRC message; then, the RAN device may obtain the Key of the UE by using the method 300 or 400, decrypt the encrypted Data Path ID by using the Key of the UE, obtain the address of the UP Function 1 and the UP 1-TEID according to the stored correspondence, generate an uplink GTP PDU according to the method in the method 300, and send the GTP PDU to the UP Function 1, so that the UP Function 1 sends the Data to the UP Function 2.

Alternatively, when the method 2000 is applied to a scenario in which a PDU Session is established using the method shown in fig. 9, the Data Path Request in S2060 does not include: data Path ID, and in S2070, the RAN apparatus stores the correspondence between the DRB and the uplink Path information in the context information of the UE, and after S2130, the UE transmits the encrypted Data to the RAN apparatus through the DRB.

The method for transmitting data according to the embodiment of the present invention is described in detail above with reference to fig. 2 to 12, and the RAN apparatus according to the embodiment of the present invention is described in detail below with reference to fig. 13. As shown in fig. 13, the RAN apparatus 10 includes:

a transceiving unit 11, configured to receive a first message sent by a user equipment UE, where the first message includes data and a first identifier;

a processing unit 12, configured to determine transmission path information of the data according to the first identifier;

the transceiver unit 11 is further configured to forward the data according to the transmission path information of the data.

Therefore, according to the RAN device in the embodiment of the present invention, the transmission path information of the data of the UE may be determined through the first identifier sent while the UE sends the data, and the data of the UE is forwarded according to the path transmission information, so that when the UE in an idle state has a data sending requirement, it is not necessary to reestablish the user plane connection between the UE and the RAN device, the signaling connection between the RAN device and the control plane device in the core network device, and the user plane connection between the RAN device and the user plane device in the core network device, thereby reducing the signaling overhead in the data transmission process and improving the efficiency of data transmission.

In this embodiment of the present invention, optionally, the transceiver unit 11 is specifically configured to: receiving the first message sent by the UE, where the first message includes the data encrypted by the first key group, the first identifier encrypted by the first key group, the identifier of the UE, and the identifier of the core network device; sending a second message to the core network device according to the identifier of the core network device, where the second message includes the identifier of the UE and the first identifier encrypted by the first secret key group, so that the core network device sends context information of the UE to the RAN device after verifying that the UE is legal according to the identifier of the UE and the first identifier encrypted by the first secret key group, where the context information of the UE includes the first key group, the first identifier, and transmission path information corresponding to the first identifier;

the processing unit 12 is configured to determine the transmission path information corresponding to the first identifier as the transmission path information of the data.

In the embodiment of the present invention, optionally, the processing unit 12 is further configured to: determining whether the RAN equipment stores the context information of the UE according to the identity of the UE;

wherein, the transceiver unit 11 is further configured to: the processing unit sends the second message to the core network device when the RAN device determines that the UE context information is not stored by the RAN device.

In this embodiment of the present invention, optionally, before the transceiver 11 receives the first message sent by the UE, the transceiver 11 is further configured to: receiving the identity of the UE sent by the UE; sending feedback information to the UE, where the feedback information is used to instruct the processing unit to determine, according to the identity of the UE, whether the RAN device stores the result of determining the context information of the UE, so that the UE requests a core network device to send the context information of the UE to the RAN device when the feedback information indicates that the RAN device does not store the context information of the UE, where the context information of the UE includes the first identity and transmission path information corresponding to the first identity;

wherein the processing unit 12 is specifically configured to: and determining the transmission path information corresponding to the first identifier as the transmission path information of the data.

In this embodiment of the present invention, optionally, before the transceiver 11 receives the first message sent by the UE, the transceiver 11 is further configured to: receiving the identity of the UE sent by the UE; sending feedback information to the UE, wherein the feedback information is used for indicating the processing unit to judge whether the RAN equipment stores a judgment result of the context information of the UE according to the identification of the UE; when the feedback information indicates that the RAN device does not store the context information of the UE, receiving a third message sent by the UE, where the third message includes an identifier of the UE, the first identifier encrypted by a second key group, and an identifier of a core network device; sending a fourth message to the core network device according to the identifier of the core network device, where the fourth message includes the identifier of the UE and the first identifier encrypted by the second key group, so that the core network device sends context information of the UE to the RAN device after verifying that the UE is legal according to the identifier of the UE and the first identifier encrypted by the second key group, and the context information of the UE includes the first identifier and transmission path information corresponding to the first identifier;

In this embodiment of the present invention, optionally, the transceiver unit 11 is specifically configured to: receiving the first message sent by the UE, where the first message includes the data encrypted by the first key group, the first identifier encrypted by the first key group, the identifier of the UE, and an identifier of a second RAN device, and the second RAN device is a RAN device determined by the UE and storing context information of the UE; when the processing unit 12 determines that the RAN device does not store the context information of the UE according to the identity of the UE, sending a fifth message to the second RAN device according to the identity of the second RAN device, where the fifth message includes the identity of the UE and the first identity encrypted by the first key group, so that the second RAN device sends the context information of the UE to the RAN device after determining that the UE is legal according to the identity of the UE and the first identity encrypted by the first key group, and the context information of the UE includes the first key group, the first identity, and transmission path information corresponding to the first identity;

In this embodiment of the present invention, optionally, the transceiver unit 11 is specifically configured to: receiving the first message sent by the UE, where the first message includes the data encrypted by the first key group, the first identifier encrypted by the first key group, and context information of the UE encrypted by a public key of the RAN device, and the context information of the UE includes the first key group;

wherein, before the transceiver unit 11 receives the first message sent by the UE, the transceiver unit 11 is further configured to: receiving the identity of the UE sent by the UE; sending feedback information to the UE, where the feedback information is used to instruct the processing unit 12 to determine, according to the identity of the UE, a determination result of whether the RAN device stores the context information of the UE, so that when the feedback information indicates that the RAN device does not store the context information of the UE, the UE encrypts the context of the UE by using the public key of the RAN device.

Wherein the processing unit 12 is specifically configured to: decrypting the context information of the UE by using a private key corresponding to the public key to obtain the first key group included in the context information of the UE; decrypting the first identifier encrypted by the first key group by using the first key group to obtain the first identifier; and determining the transmission path information of the data according to the corresponding relation between the first identifier and the transmission path information.

In this embodiment of the present invention, optionally, context information of the UE is stored in both the RAN device and the UE, where the context information of the UE includes a first key group, the first identifier, and transmission path information corresponding to the first identifier, and before the transceiver unit 11 receives the first message sent by the UE, the transceiver unit 11 is further configured to: receiving a sixth message sent by the UE, where the sixth message is used to request the RAN device to recover the signaling connection between the RAN device and the UE; sending a seventh message to the UE, where the seventh message is used to indicate that the signaling connection between the RAN device and the UE is recovered, so that the UE encrypts the data and the first identifier using the first key group after receiving the seventh message;

In this embodiment of the present invention, optionally, before the transceiver 11 forwards the data according to the transmission path information of the data, the processing unit 12 is further configured to: acquiring a second identifier of the UE, where the second identifier is used for determining, when the RAN device receives downlink data, that a target receiving device of the downlink data is the UE; determining next skip sending equipment of the data according to the transmission path information of the data;

The transceiver unit 11 is specifically configured to: and sending the data and the second identifier to the next hop forwarding device.

In this embodiment of the present invention, optionally, the transmission path information of the data includes: address information of a next hop forwarding device of the data; or, address information of a next forwarding device of the data and a third identifier allocated to the UE by the next forwarding device, where the third identifier is used for determining that the data belongs to the UE after the next forwarding device receives the data sent by the RAN device.

The RAN device 10 according to the embodiment of the present invention may correspond to the RAN device in the method according to the embodiment of the present invention, and each unit, i.e., module, and the other operations and/or functions in the RAN device 10 are respectively for implementing corresponding flows in the methods 100 to 700, and are not described herein again for brevity.

Fig. 14 shows a user equipment according to an embodiment of the present invention, and as shown in fig. 14, the user equipment 20 includes:

a processing unit 21, configured to determine a first identifier corresponding to data, where the first identifier is used by a first radio access network RAN device to determine transmission path information of the data according to the first identifier;

a transceiving unit 22, configured to send a first message to the first RAN device, where the first message includes the data and the first identifier.

Therefore, when the UE according to the embodiment of the present invention sends data to the first RAN device, the UE sends the first identifier to the first RAN device at the same time, so that the first RAN device obtains the transmission path information of the data of the UE according to the first identifier, and therefore, when the UE in an idle state has a data sending requirement, it is not necessary to reestablish the user plane connection between the UE and the RAN device, the signaling connection between the RAN device and the control plane device in the core network device, and the user plane connection between the RAN device and the user plane device in the core network device, so that signaling overhead in a data transmission process can be reduced, and data transmission efficiency is improved.

In the embodiment of the present invention, optionally, the processing unit 21 is further configured to: encrypting the data and the first identifier by using a first secret key group;

the transceiver unit 22 is specifically configured to: sending a first message to the first RAN device, where the first message includes the data encrypted by the UE using the first key group, the first identifier encrypted by the UE using the first key group, an identifier of the UE, and an identifier of a core network device, so that the first RAN device obtains context information of the UE according to the identifier of the UE, the identifier of the core network device, and the first identifier encrypted by the UE using the first key group, and the context information of the UE includes the first key group, the first identifier, and transmission path information corresponding to the first identifier.

In this embodiment of the present invention, optionally, before the transceiver unit 22 sends the first message to the first RAN device, the transceiver unit 22 is further configured to: sending the identity of the UE to the first RAN device; receiving feedback information sent by the first RAN device, where the feedback information is used to instruct the first RAN device to determine, according to the identity of the UE, whether a determination result of context information of the UE is stored, where the context information of the UE includes the first identity and transmission path information corresponding to the first identity; and sending a second message to the core network device when the feedback information indicates that the first RAN device does not store the context information of the UE, where the second message is used to request the core network device to send the context information of the UE to the first RAN device.

In this embodiment of the present invention, optionally, before the transceiver unit 22 sends the first message to the first RAN device, the transceiver unit 22 is further configured to: sending the identity of the UE to the first RAN device; receiving feedback information sent by the first RAN device, where the feedback information is used to instruct the first RAN device to determine, according to the identity of the UE, whether a determination result of context information of the UE is stored; when the feedback information indicates that the first RAN device does not store the context information of the UE, sending a third message to the first RAN device, where the third message includes an identifier of the UE, the first identifier encrypted by a second key group, and an identifier of a core network device, so that the first RAN device obtains the context information of the UE according to the identifier of the UE, the first identifier encrypted by the second key group, and the identifier of the core network device, and the context information of the UE includes the first identifier and transmission path information corresponding to the first identifier.

the transceiver unit 22 is specifically configured to: sending a first message to the first RAN device, where the first message includes the data encrypted by the UE using the first key group, the first identifier encrypted by the UE using the first key group, an identifier of the UE, and an identifier of a second RAN device, where the second RAN device is a RAN device determined by the UE and storing context information of the UE, so that the first RAN device obtains the context information of the UE according to the identifier of the UE, the first identifier encrypted by the UE using the first key group, and the identifier of the second RAN device, and the context information of the UE includes the first key group, the first identifier, and transmission path information corresponding to the first identifier.

In this embodiment of the present invention, optionally, the transceiver unit 22 is further configured to: sending the identity of the UE to the first RAN device; and receiving feedback information sent by the first RAN device, where the feedback information is used to instruct the first RAN device to determine, according to the identity of the UE, whether a determination result of the context information of the UE is stored.

The processing unit 21 is further configured to perform encryption processing on the context of the UE by using the public key of the first RAN device when the feedback information indicates that the first RAN device does not store the context information of the UE, where the context information of the UE includes a first key group;

the transceiver unit 22 is further configured to send a first message to the first RAN device, where the first message includes the data encrypted by the processing unit 21 using the first key group, the first identifier encrypted by the UE using the first key group, and the context information of the UE encrypted by the processing unit using the public key of the first RAN device, so that the first RAN device obtains the transmission path information of the data according to the context information of the UE.

In this embodiment of the present invention, optionally, context information of the UE is stored in both the first RAN device and the UE, where the context information of the UE includes a first key group, the first identifier, and transmission path information corresponding to the first identifier, and before the transceiver unit 22 sends the first message to the first RAN device, the transceiver unit 22 is further configured to: sending a fourth message to the first RAN device, the fourth message being used to request the first RAN device to resume the connection between the UE and the first RAN device; receiving a fifth message sent by the first RAN device, the fifth message indicating that the connection between the UE and the first RAN device is restored.

The transceiver unit 22 sends a first message to the first RAN device, specifically: the first message is sent to the first RAN device over the connection.

In this embodiment of the present invention, optionally, before the transceiver unit 22 sends the fourth message to the first RAN device, the transceiver unit 22 is further configured to: sending a sixth message to the first RAN device, the sixth message being used to instruct the first RAN device to set the UE to a suspended state; and receiving a seventh message sent by the first RAN device, where the seventh message is used to indicate that the first RAN device has set the UE to a suspended state.

In this embodiment of the present invention, optionally, the processing unit 21 is further configured to determine whether a moving range of the UE in a preset time period is within a preset range;

the transceiver unit 22 is configured to send the sixth message to the first RAN device when the processing unit 21 determines that the moving range of the UE in the preset time period is within the preset range.

In this embodiment of the present invention, optionally, the transmission path information of the data includes: address information of a next hop forwarding device of the data, or address information of the next hop forwarding device of the data and a third identifier allocated to the UE by the next hop forwarding device, where the third identifier is used for determining that the data belongs to the UE after the next hop forwarding device receives the data sent by the first RAN device.

The user equipment 20 according to the embodiment of the present invention may correspond to the user equipment in the method according to the embodiment of the present invention, and each unit, i.e., the module, and the other operations and/or functions in the user equipment 20 are respectively for implementing the corresponding flows in the methods 100 to 700, and are not described herein again for brevity.

Fig. 15 is a RAN apparatus according to another embodiment of the present invention, and as shown in fig. 15, the RAN apparatus 30 includes:

a transceiver unit 31, configured to receive data sent by a user equipment UE through a data radio bearer DRB;

a processing unit 32, configured to determine transmission path information of the data according to a corresponding relationship between the DRB and the transmission path information;

the processing unit 32 is further configured to obtain a first identifier of the UE, where the first identifier is used for determining, when the RAN device receives downlink data, that a destination receiving device of the downlink data is the UE;

the transceiving unit 31 is further configured to send the data and the first identifier of the UE to a next hop forwarding device of the data according to the transmission path information of the data.

Therefore, the RAN device according to the embodiment of the present invention sends the first identifier of the UE to the next hop forwarding device when sending data to the next hop forwarding device that receives the data of the UE, and since the first identifier can be used to determine the destination receiving device of the downlink data and the UE when the RAN device receives the downlink data, signaling overhead in a data transmission process can be saved, and data transmission efficiency can be improved.

In this embodiment of the present invention, optionally, context information of the UE is stored in both the RAN device and the UE, where the context information of the UE includes a key group, the first identifier, and transmission path information corresponding to the first identifier, and before the transceiver unit receives data sent by the UE, the transceiver unit 31 is further configured to: receiving a first message sent by the UE, where the first message is used to request the RAN device to recover the signaling connection between the RAN device and the UE and the DRB; sending a second message to the UE, the second message indicating that the signaling connection between the RAN equipment and the UE and the DRB are recovered.

In this embodiment of the present invention, optionally, before the transceiver unit 31 receives the data packet sent by the UE, the transceiver unit 31 is further configured to: receiving a third message sent by core network equipment, wherein the third message comprises context information of the UE, and the context information of the UE comprises transmission path information corresponding to the DRB;

the processing unit 32 is further configured to establish the DRB with the UE according to the context information of the UE;

the transceiver unit 31 is further configured to receive data sent by the UE through the DRB.

In this embodiment of the present invention, optionally, the transmission path information of the data includes: address information of a next hop forwarding device of the data; or, address information of a next forwarding device of the data and a second identifier allocated to the UE by the next forwarding device, where the second identifier is used for determining that the data belongs to the UE after the next forwarding device receives the data sent by the RAN device.

The RAN device 30 according to the embodiment of the present invention may correspond to the RAN device in the method according to the embodiment of the present invention, and each unit, i.e., the module, and the other operations and/or functions in the RAN device 30 are respectively for implementing corresponding flows in the methods 700 to 2000, and are not described herein again for brevity.

Fig. 16 shows a user equipment according to another embodiment of the present invention, and as shown in fig. 16, the user equipment 40 includes:

a sending unit 41, configured to send a first message to a radio access network RAN device, where the first message is used to request the RAN device to set the UE to a suspend state;

a receiving unit 42, configured to receive a second message sent by the RAN device, where the second message is used to indicate that the RAN device has set the UE in a suspended state, so that when the UE sends data to the RAN device, the UE requests the RAN device to resume connection between the UE and the RAN device, and sends data to the RAN device through the connection.

Therefore, the UE according to the embodiment of the invention requests the RAN equipment to set the UE in the suspended state, so that when the UE needs to send data, the UE can request the RAN equipment to directly recover the connection between the RAN equipment and the UE, the signaling overhead can be saved, and the data transmission efficiency can be improved.

In this embodiment of the present invention, optionally, as shown in fig. 17, the user equipment 40 further includes:

a processing unit 43, configured to determine whether a moving range of the UE in a preset time period is within a preset range;

the sending unit 41 is specifically configured to send the first message to the RAN device when the processing unit 43 determines that the moving range of the UE in the time period with the device is within a preset range.

The ue 40 according to the embodiment of the present invention may correspond to the ue in the method according to the embodiment of the present invention, and each unit, i.e., the module, and the other operations and/or functions in the ue 40 are respectively for implementing the corresponding flows in the methods 700 to 2000, and are not described herein again for brevity.

Fig. 18 shows a schematic block diagram of a RAN apparatus according to still another embodiment of the present invention, and as shown in fig. 18, the RAN apparatus 100 includes: processor 110 and transceiver 120, processor 110 and transceiver 120 being coupled, optionally, RAN apparatus 100 further comprises memory 130, memory 130 being coupled to processor 110, further optionally, RAN apparatus 100 comprises bus system 140. Wherein the processor 110, the memory 130, and the transceiver 120 may be connected via a bus system 140, the memory 130 may be used for storing instructions, the processor 110 is used for executing the instructions stored in the memory 130, so as to control the transceiver 120 to transmit information or signals,

The transceiver 120 is configured to receive a first message sent by a user equipment UE, where the first message includes data and a first identifier;

the processor 110 is configured to determine transmission path information of the data according to the first identifier;

the transceiver 120 is further configured to forward the data according to the transmission path information of the data.

Therefore, according to the RAN device in the embodiment of the present invention, the transmission path information of the data of the UE may be determined through the first identifier sent while the UE sends the data, and the data of the UE is forwarded according to the path transmission information, so that when the UE in an idle state has a data sending requirement, signaling overhead in a data transmission process may be reduced, and data transmission efficiency may be improved.

Optionally, as an embodiment, the transceiver 120 is specifically configured to: receiving the first message sent by the UE, where the first message includes the data encrypted by the first key group, the first identifier encrypted by the first key group, the identifier of the UE, and the identifier of the core network device; sending a second message to the core network device according to the identifier of the core network device, where the second message includes the identifier of the UE and the first identifier encrypted by the first secret key group, so that the core network device sends context information of the UE to the RAN device after verifying that the UE is legal according to the identifier of the UE and the first identifier encrypted by the first secret key group, where the context information of the UE includes the first key group, the first identifier, and transmission path information corresponding to the first identifier;

The processor 110 is configured to determine the transmission path information corresponding to the first identifier as the transmission path information of the data.

Optionally, as an embodiment, the processor 110 is further configured to: determining whether the RAN equipment stores the context information of the UE according to the identity of the UE;

wherein the transceiver 120 is further configured to: the second message is sent to the core network device when the processor 110 determines that the RAN device does not maintain the context information of the UE.

Optionally, as an embodiment, before the transceiver 120 receives the first message sent by the UE, the transceiver 120 is further configured to: receiving the identity of the UE sent by the UE; sending feedback information to the UE, where the feedback information is used to instruct the processing unit to determine, according to the identity of the UE, whether the RAN device stores the result of determining the context information of the UE, so that the UE requests a core network device to send the context information of the UE to the RAN device when the feedback information indicates that the RAN device does not store the context information of the UE, where the context information of the UE includes the first identity and transmission path information corresponding to the first identity;

wherein the processor 110 is specifically configured to: and determining the transmission path information corresponding to the first identifier as the transmission path information of the data.

Optionally, as an embodiment, before the transceiver 120 receives the first message sent by the UE, the transceiver 120 is further configured to: receiving the identity of the UE sent by the UE; sending feedback information to the UE, wherein the feedback information is used for indicating the processing unit to judge whether the RAN equipment stores a judgment result of the context information of the UE according to the identification of the UE; when the feedback information indicates that the RAN device does not store the context information of the UE, receiving a third message sent by the UE, where the third message includes an identifier of the UE, the first identifier encrypted by a second key group, and an identifier of a core network device; sending a fourth message to the core network device according to the identifier of the core network device, where the fourth message includes the identifier of the UE and the first identifier encrypted by the second key group, so that the core network device sends context information of the UE to the RAN device after verifying that the UE is legal according to the identifier of the UE and the first identifier encrypted by the second key group, and the context information of the UE includes the first identifier and transmission path information corresponding to the first identifier;

Optionally, as an embodiment, the transceiver 120 is specifically configured to: receiving the first message sent by the UE, where the first message includes the data encrypted by the first key group, the first identifier encrypted by the first key group, the identifier of the UE, and an identifier of a second RAN device, and the second RAN device is a RAN device determined by the UE and storing context information of the UE; when the processor 110 determines that the RAN device does not store the context information of the UE according to the identity of the UE, sending a fifth message to the second RAN device according to the identity of the second RAN device, where the fifth message includes the identity of the UE and the first identity encrypted by the first key group, so that the second RAN device sends the context information of the UE to the RAN device after determining that the UE is legal according to the identity of the UE and the first identity encrypted by the first key group, and the context information of the UE includes the first key group, the first identity, and transmission path information corresponding to the first identity;

Optionally, as an embodiment, the transceiver 120 is specifically configured to: receiving the first message sent by the UE, where the first message includes the data encrypted by the first key group, the first identifier encrypted by the first key group, and context information of the UE encrypted by a public key of the RAN device, and the context information of the UE includes the first key group;

wherein, before the transceiver 120 receives the first message sent by the UE, the transceiver 120 is further configured to: receiving the identity of the UE sent by the UE; sending feedback information to the UE, where the feedback information is used to instruct the processor 110 to determine, according to the identity of the UE, a determination result of whether the RAN device stores the context information of the UE, so that when the feedback information indicates that the RAN device does not store the context information of the UE, the UE encrypts the context of the UE using the public key of the RAN device.

Wherein the processor 110 is specifically configured to: decrypting the context information of the UE by using a private key corresponding to the public key to obtain the first key group included in the context information of the UE; decrypting the first identifier encrypted by the first key group by using the first key group to obtain the first identifier; and determining the transmission path information of the data according to the corresponding relation between the first identifier and the transmission path information.

Optionally, as an embodiment, context information of the UE is stored in both the RAN device and the UE, where the context information of the UE includes a first key group, the first identifier, and transmission path information corresponding to the first identifier, and before the transceiver 120 receives the first message sent by the UE, the transceiver 120 is further configured to: receiving a sixth message sent by the UE, where the sixth message is used to request the RAN device to recover the signaling connection between the RAN device and the UE; sending a seventh message to the UE, where the seventh message is used to indicate that the signaling connection between the RAN device and the UE is recovered, so that the UE encrypts the data and the first identifier using the first key group after receiving the seventh message;

Optionally, as an embodiment, before the transceiver 120 forwards the data according to the transmission path information of the data, the processor 110 is further configured to: acquiring a second identifier of the UE, where the second identifier is used for determining, when the RAN device receives downlink data, that a target receiving device of the downlink data is the UE; determining next skip sending equipment of the data according to the transmission path information of the data;

The transceiver 120 is specifically configured to: and sending the data and the second identifier to the next hop forwarding device.

Optionally, as an embodiment, the transmission path information of the data includes: address information of a next hop forwarding device of the data; or, address information of a next forwarding device of the data and a third identifier allocated to the UE by the next forwarding device, where the third identifier is used for determining that the data belongs to the UE after the next forwarding device receives the data sent by the RAN device.

The RAN device 100 according to the embodiment of the present invention may correspond to the RAN device in the method according to the embodiment of the present invention, and each unit, i.e., module, and the other operations and/or functions in the RAN device 100 are respectively for implementing corresponding flows in the methods 100 to 700, and are not described herein again for brevity.

According to the RAN equipment provided by the embodiment of the invention, the transmission path information of the data of the UE can be determined through the first identification sent while the data is sent by the UE, and the data of the UE is forwarded according to the path transmission information, so that when the UE in an idle state has a data sending requirement, the signaling overhead in the data transmission process can be reduced, and the data transmission efficiency is improved.

Alternatively, the first and second electrodes may be,

the transceiver 120 is configured to receive data sent by a user equipment UE through a data radio bearer DRB;

the processor 110 is configured to determine transmission path information of the data according to a corresponding relationship between the DRB and the transmission path information;

the processor 110 is configured to obtain a first identifier of the UE, where the first identifier is used for determining, when the RAN device receives downlink data, that a destination receiving device of the downlink data is the UE;

the transceiver 120 is further configured to transmit the data and the first identifier of the UE to a next hop forwarding device of the data according to the transmission path information of the data.

Optionally, as an embodiment, the RAN device and the UE both store context information of the UE, where the context information of the UE includes a key group, the first identifier, and transmission path information corresponding to the first identifier, and before the transceiver 120 receives data sent by the UE, the transceiver 120 is further configured to: receiving a first message sent by the UE, where the first message is used to request the RAN device to recover the signaling connection between the RAN device and the UE and the DRB; sending a second message to the UE, the second message indicating that the signaling connection between the RAN equipment and the UE and the DRB are recovered.

Optionally, as an embodiment, before the transceiver 120 receives the data packet sent by the UE, the transceiver 120 is further configured to: receiving a third message sent by core network equipment, wherein the third message comprises context information of the UE, and the context information of the UE comprises transmission path information corresponding to the DRB;

the processor 110 is further configured to establish the DRB with the UE according to the context information of the UE;

the transceiver 120 is further configured to receive data sent by the UE through the DRB.

Optionally, as an embodiment, the transmission path information of the data includes: address information of a next hop forwarding device of the data; or, address information of a next forwarding device of the data and a second identifier allocated to the UE by the next forwarding device, where the second identifier is used for determining that the data belongs to the UE after the next forwarding device receives the data sent by the RAN device.

The RAN device 100 according to the embodiment of the present invention may correspond to the RAN device in the method according to the embodiment of the present invention, and each unit, i.e., the module, and the other operations and/or functions in the RAN device 100 are respectively for implementing corresponding flows in the methods 800 to 2000, and are not described herein again for brevity.

According to the embodiment of the invention, the RAN equipment sends the data to the next hop forwarding equipment of the received UE data, and simultaneously sends the first identification of the UE to the next hop forwarding equipment.

Fig. 19 shows a schematic block diagram of a user equipment according to still another embodiment of the present invention, and as shown in fig. 19, the user equipment 200 includes: processor 210 and transceiver 220, processor 210 and transceiver 220 being coupled, optionally, the user device 200 further comprises a memory 230, memory 230 being coupled to processor 210, further optionally, the user device 200 comprises a bus system 240. Wherein the processor 210, the memory 230, and the transceiver 220 may be coupled via a bus system 240, the memory 230 may be configured to store instructions, the processor 210 may be configured to execute the instructions stored by the memory 230, to control the transceiver 220 to transmit information or signals,

the processor 210 is configured to determine a first identifier corresponding to data, where the first identifier is used for determining, by a first radio access network RAN device, transmission path information of the data according to the first identifier;

The transceiver 220 is configured to send a first message to the first RAN device, where the first message includes the data and the first identifier.

Therefore, when the user equipment UE according to the embodiment of the present invention sends data to the first RAN equipment, the first identifier is sent to the first RAN equipment at the same time, so that the first RAN equipment obtains the transmission path information of the data of the UE according to the first identifier.

Optionally, as an embodiment, the processor 210 is further configured to: encrypting the data and the first identifier by using a first secret key group;

the transceiver 220 is specifically configured to: sending a first message to the first RAN device, where the first message includes the data encrypted by the UE using the first key group, the first identifier encrypted by the UE using the first key group, an identifier of the UE, and an identifier of a core network device, so that the first RAN device obtains context information of the UE according to the identifier of the UE, the identifier of the core network device, and the first identifier encrypted by the UE using the first key group, and the context information of the UE includes the first key group, the first identifier, and transmission path information corresponding to the first identifier.

Optionally, as an embodiment, before the transceiver 220 sends the first message to the first RAN device, the transceiver 220 is further configured to: sending the identity of the UE to the first RAN device; receiving feedback information sent by the first RAN device, where the feedback information is used to instruct the first RAN device to determine, according to the identity of the UE, whether a determination result of context information of the UE is stored, where the context information of the UE includes the first identity and transmission path information corresponding to the first identity; and sending a second message to the core network device when the feedback information indicates that the first RAN device does not store the context information of the UE, where the second message is used to request the core network device to send the context information of the UE to the first RAN device.

Optionally, as an embodiment, before the transceiver 220 sends the first message to the first RAN device, the transceiver 220 is further configured to: sending the identity of the UE to the first RAN device; receiving feedback information sent by the first RAN device, where the feedback information is used to instruct the first RAN device to determine, according to the identity of the UE, whether a determination result of context information of the UE is stored; when the feedback information indicates that the first RAN device does not store the context information of the UE, sending a third message to the first RAN device, where the third message includes an identifier of the UE, the first identifier encrypted by a second key group, and an identifier of a core network device, so that the first RAN device obtains the context information of the UE according to the identifier of the UE, the first identifier encrypted by the second key group, and the identifier of the core network device, and the context information of the UE includes the first identifier and transmission path information corresponding to the first identifier.

the transceiver 220 is specifically configured to: sending a first message to the first RAN device, where the first message includes the data encrypted by the UE using the first key group, the first identifier encrypted by the UE using the first key group, an identifier of the UE, and an identifier of a second RAN device, where the second RAN device is a RAN device determined by the UE and storing context information of the UE, so that the first RAN device obtains the context information of the UE according to the identifier of the UE, the first identifier encrypted by the UE using the first key group, and the identifier of the second RAN device, and the context information of the UE includes the first key group, the first identifier, and transmission path information corresponding to the first identifier.

Optionally, as an embodiment, the transceiver 220 is further configured to: sending the identity of the UE to the first RAN device; and receiving feedback information sent by the first RAN device, where the feedback information is used to instruct the first RAN device to determine, according to the identity of the UE, whether a determination result of the context information of the UE is stored.

The processor 210 is further configured to, when the feedback information indicates that the first RAN device does not store context information of the UE, perform encryption processing on a context of the UE using a public key of the first RAN device, where the context information of the UE includes a first key group;

the transceiver 220 is further configured to send a first message to the first RAN device, where the first message includes the data encrypted by the processor 210 using the first key group, the first identifier encrypted by the UE using the first key group, and the context information of the UE encrypted by the processing unit using the public key of the first RAN device, so that the first RAN device can obtain the transmission path information of the data according to the context information of the UE.

Optionally, as an embodiment, context information of the UE is stored in both the first RAN device and the UE, where the context information of the UE includes a first key group, the first identifier, and transmission path information corresponding to the first identifier, and before the transceiver 220 sends the first message to the first RAN device, the transceiver 220 is further configured to: sending a fourth message to the first RAN device, the fourth message being used to request the first RAN device to resume the connection between the UE and the first RAN device; receiving a fifth message sent by the first RAN device, the fifth message indicating that the connection between the UE and the first RAN device is restored.

The transceiver 220 sends a first message to the first RAN device, specifically: the first message is sent to the first RAN device over the connection.

Optionally, as an embodiment, before the transceiver 220 sends the fourth message to the first RAN device, the transceiver 220 is further configured to: sending a sixth message to the first RAN device, the sixth message being used to instruct the first RAN device to set the UE to a suspended state; and receiving a seventh message sent by the first RAN device, where the seventh message is used to indicate that the first RAN device has set the UE to a suspended state.

Optionally, as an embodiment, the processor 210 is further configured to determine whether a moving range of the UE in a preset time period is within a preset range;

the transceiver 220 is configured to send the sixth message to the first RAN apparatus when the processor 210 determines that the UE has a movement range within a preset range for a preset time period.

Optionally, as an embodiment, the transmission path information of the data includes: address information of a next hop forwarding device of the data, or address information of the next hop forwarding device of the data and a third identifier allocated to the UE by the next hop forwarding device, where the third identifier is used for determining that the data belongs to the UE after the next hop forwarding device receives the data sent by the first RAN device.

The user equipment 200 according to the embodiment of the present invention may correspond to the user equipment in the method according to the embodiment of the present invention, and each unit, i.e., module, and the other operations and/or functions in the user equipment 200 are respectively for implementing the corresponding flows in the methods 100 to 700, and are not described herein again for brevity.

According to the embodiment of the invention, when the UE sends data to the first RAN equipment, the UE sends the first identifier to the first RAN equipment at the same time, so that the first RAN equipment acquires the transmission path information of the data of the UE according to the first identifier.

Alternatively, the first and second electrodes may be,

the transceiver 220 is configured to send a first message to a radio access network RAN device, where the first message is used to request the RAN device to set the UE in a suspended state;

the transceiver 220 is further configured to receive a second message sent by the RAN device, where the second message is used to indicate that the RAN device has set the UE in a suspended state, so that the UE requests the RAN device to resume connection between the UE and the RAN device when sending data to the RAN device, and send data to the RAN device through the connection.

Alternatively, the processor may, as an embodiment,

the processor 210 is configured to determine whether a moving range of the UE within a preset time period is within a preset range;

the transceiver 220 is specifically configured to send the first message to the RAN device when the processor 210 determines that a moving range of the UE in a time period with the device is within a preset range.

The ue 40 according to the embodiment of the present invention may correspond to the ue in the method according to the embodiment of the present invention, and each unit, i.e., the module, and the other operations and/or functions in the ue 40 are respectively for implementing the corresponding flows in the methods 800 to 2000, and are not described herein again for brevity.

According to the embodiment of the invention, the UE requests the RAN equipment to set the UE in the suspended state, so that when the UE needs to send data, the UE can request the RAN equipment to directly recover the connection between the RAN equipment and the UE, the signaling overhead can be saved, and the data transmission efficiency can be improved.

Fig. 20 is a schematic flow chart diagram of a method of data transmission according to yet another embodiment of the present invention. As shown in fig. 20, method 3000 includes:

s3010, a user equipment UE sends a first message to a core network device through AN access network AN device, wherein the first message is used for requesting to enter a first state, the first message comprises first information, and the first information is used for the core network device to determine parameter information used by the UE in the first state;

here, the AN may be a 3GPP defined access network, such as a 4G RAN, a 5G RAN, or a non-3 GPP defined network, such as WiFi, ethernet, etc.

S3020, the UE receives a second message sent by the core network device, where the second message includes the parameter information.

Therefore, according to the data transmission method of the embodiment of the present invention, the user equipment sends the first message requesting to enter the first state to the core network equipment, and the core network equipment determines the parameter information used by the UE in the first state according to the information in the first message, and sends the second message including the parameter information to the UE, so that the user equipment can enter the suspend state, thereby improving the data transmission efficiency and saving the signaling overhead.

Here, the core network device may determine that the UE requests to enter the first state according to the first message, or determine that the UE requests to enter the first state according to content carried in the first message, specifically, may determine according to indication information that the UE requests to enter the first state and is carried in the first message, or may determine according to a Cell list carried in the first message.

In this embodiment of the present invention, optionally, when the UE enters the first state, the UE stops sending the periodic location update request message to the core network device. The UE stopping sending the periodic location update request message to the core network device includes stopping the periodic update timer or setting the periodic update timer to an unavailable state after the UE enters the first state, thereby stopping sending the periodic location update request message to the core network device.

In this embodiment of the present invention, optionally, the first information includes first range information, where the first range information is used to identify a moving range of the UE in the first state. Correspondingly, the core network device determines second range information according to the first range information, where the second range information is used to indicate a moving range of the UE determined by the core network device when the UE is in the first state. Subsequently, when the network has data to send the UE, the core network device or the AN device only needs to page the paging UE within the second range indicated by the second range information.

In the embodiment of the present invention, optionally, the UE is determined according to historical movement information of the UE, or the first range information is determined by the UE according to the historical movement information of the UE and a time period corresponding to the historical movement information.

In this embodiment of the present invention, optionally, before the UE sends the first message to the core network device through the access network AN device, the UE determines to enter the first mobility range indicated by the first mobility range information, and then sends the first message to the core network device through the access network AN device. For example, the UE may determine the moving range of the UE in the first state according to the historical moving information of the UE recorded by the UE. When the UE determines that the UE enters the moving range, the UE sends a first message to the core network equipment. The moving range of the UE in the first state determined by the core network device may be understood as that the network is always in the first state when determining that the UE moves within the moving range. Optionally, when the UE moves out of the moving range, the UE reports that the UE has moved out of the moving range to the network. The moving range of the UE in the first state determined by the core network device may be the first range information sent by the UE, or a range generated by the core network device based on the first range information and/or the network configuration information reported by the UE. Assuming that the UE reports a Cell List, the core network device may generate a Tracking Area (TA) List or AN Routing Area (ARA) List according to the Cell List. For example, the UE determines that the user using the UE is 9: 00-18: 00 on the office of a company, the company scope is a cell list containing cell-1, cell-2, cell-3. The UE requests the network to enter the first state after determining that the user arrives at the company (that is, the UE enters the cell list), where the request carries the cell list, and the cell list is a moving range in the first state reported by the UE. The network may generate a moving range determined by the network according to the cell list, where the moving range determined by the network may be the cell list reported by the UE, or may be a TA list or an ARA list generated according to the cell list reported by the UE.

Optionally, as an embodiment, the first range information includes a Cell List (Cell List) that the UE is in the first state, or the first range information includes a location area List that the UE is in the first state.

In this embodiment of the present invention, optionally, the first information further includes first time period information, where the first time period information is used to indicate a time period that the UE is in the first range. Correspondingly, the core network device determines second time period information according to the first time period information, where the second time period information is used to indicate the time period in which the UE is in the first state, which is determined by the core network device.

In this embodiment of the present invention, optionally, when the UE determines that the UE moves out of the range identified by the second range information, the UE sends a third message to the core network device, where the third message is used to request to exit the first state and/or enter the second state, or the third message is used to notify the core network device that the UE leaves the second range.

In this embodiment of the present invention, optionally, the first information includes mobility mode information, where the mobility mode information is used to indicate a mobility mode of the UE, and the mobility mode includes a mobility frequency or a mobility range of the UE.

In this embodiment of the present invention, optionally, the moving mode is determined by the UE according to historical moving information of the UE, or the moving mode is determined by the UE according to historical moving information of the UE and a time period corresponding to the historical moving information. Correspondingly, the core network device determines the mobility mode of the UE according to the mobility mode information, and then when the core network device sends a second message to the UE, the second message carries information indicating the mobility mode of the UE determined by the core network device. Further, optionally, the UE sends the first message to the core network entity when the determined mobility mode changes or the UE enters the time period information corresponding to the mobility mode.

The movement pattern may be, for example: large range of motion, small range of motion, or relatively stationary, etc.

For example, the UE determines that the user using the UE is 9: 00-18: 00 when the company is working, the UE reports the movement mode of the UE to the network as moving within a small range. The UE sends the first message to a core network entity when determining that the UE moves from a large range to a small range; or, the UE is determining that the UE enters 9: 00-18: 00, and sending the first message to the core network entity.

In the embodiment of the present invention, optionally, the first information includes traffic information of the UE, where the traffic information is used to describe data transceiving frequency of the UE.

Optionally, as an example, the traffic information is determined by the UE according to an application currently running by the UE, or the traffic information is determined by the UE according to a historical traffic of the UE, or the traffic information is determined by the UE according to the historical traffic of the UE and a time period corresponding to the historical traffic.

For example, if the UE determines that social software such as QQ or WeChat is available on the UE and data needs to be frequently transmitted and received between networks, the traffic of the UE is frequently transmitted.

In the implementation of the present invention, optionally, before the UE sends the first message to the core network device through the access network AN device, as shown in fig. 20, the method 3000 further includes:

s3030, the UE sends a registration message to the core network device, where the registration message carries information indicating that the UE supports the first state;

that is to say, the core network device receives a registration message sent by the UE, where the registration message carries information indicating that the UE supports the first state.

S3040, the UE receives a registration response message sent by the core network device, where the registration response message carries information that the core network device supports the first state.

That is to say, the core network device sends a registration response message to the UE, where the registration response message carries information that the core network device supports the first state.

In the embodiment of the present invention, optionally, the first state includes: AN (AN) Level Tracking is carried out on the AN Level position; alternatively, RRC radio resource management deactivates the Connected state (Inactive Connected); alternatively, Suspend (Suspend) state; or, the connection management CM long connection state; alternatively, CM connected state, RRC deactivated connected state. The AN-level location tracking is that the AN tracks the location of the UE, i.e. when the UE is in the moving range sent by the AN to the UE, the AN does not need to be informed; when the UE moves out of range of the AN, the AN needs to be notified. RRC Inactive Connected is a state of the UE in which no signaling and/or data connection exists between the UE and the AN, but a signaling and/or data connection exists between the AN and the core network entity, and the context of the UE is maintained in both the AN and the core network entity. Suspend is a state of the UE in which a signaling and/or data connection between the UE and the AN does not exist, but a signaling and/or data connection of the UE exists between the AN and a core network entity, and the context of the UE is maintained in both the AN and the core network entity. The CM connection management long connection state is a state of one UE, and in this state, the UE is always in a CM connection state, i.e., an NAS signaling connection state, as viewed by a core network entity. The CM connected state and the RRC radio resource management deactivation connected state are states of one UE, in which the RRC connection between the UE and the AN may be in a disconnected state, and the UE is in a CM connected state, i.e., AN NAS signaling connected state, as viewed by the core network entity.

Fig. 21 shows a method of data transmission according to an embodiment of the invention, and as shown in fig. 21, the method 4000 includes:

s4010, a User Equipment (UE) sends a first message to AN Access Network (AN) device, wherein the first message is used for requesting to enter a first state, the first message comprises first information, and the first information is used for the AN device to determine parameter information used by the UE in the first state;

here, the AN device may determine that the UE requests to enter the first state according to the first message, or the AN device determines that the UE requests to enter the first state according to content carried in the first message, and specifically, may determine that the AN device requests to enter the first state according to indication information carried in the first message.

S4020, the UE receives a second message sent by the AN device, where the second message includes the parameter information.

Therefore, according to the data transmission method of the embodiment of the present invention, the user equipment sends the first message requesting to enter the first state to the access network equipment, the access network equipment determines the parameter information used by the UE in the first state according to the information in the first message, and sends the second message including the parameter information to the UE, so that the user equipment can enter the suspend state, thereby improving the data transmission efficiency and saving the signaling overhead.

Here, the AN device may determine that the UE requests to enter the first state according to the first message, or the AN device determines that the UE requests to enter the first state according to content carried in the first message, specifically, may determine according to indication information carried in the first message that the UE requests to enter the first state, or may determine according to Cell list carried in the first message.

In this embodiment of the present invention, optionally, the first information includes first range information, where the first range information is used to identify a moving range of the UE in the first state. Correspondingly, the AN equipment determines second range information according to the first range information, wherein the second range information is used for indicating the moving range of the UE determined by the nuclear AN equipment when the UE is in the first state.

In this embodiment of the present invention, optionally, the first range information is determined by the UE according to historical movement information of the UE, or the first range information is determined by the UE according to the historical movement information of the UE and a time period corresponding to the historical movement information.

In the embodiment of the present invention, optionally, before the UE sends the first message to the AN device, the UE determines to enter the first mobility range indicated by the first mobility range information.

For example, the UE may determine the moving range of the UE in the first state according to the historical moving information of the UE recorded by the UE. When the UE determines that the UE enters the moving range, the UE transmits a first message to the AN device. The movement range of the UE determined by the AN device to be in the first state may be understood as the AN device always being in the first state when determining that the UE is moving within the range. Optionally, when the UE moves out of the moving range, the UE reports that the UE has moved out of the moving range to the AN. The moving range of the UE in the first state determined by the AN device may be first range information sent by the UE, or a range generated by the AN device based on the first range information and/or network configuration information reported by the UE. Assuming that the UE reports a Cell List, the AN apparatus may generate a Tracking Area (TA) List or AN ARA List according to the Cell List. For example, the UE determines that the user using the UE is 9: 00-18: 00 on the office of a company, the company scope is a cell list containing cell-1, cell-2, cell-3. The UE requests the AN to enter the first state after determining that the user arrives at the company (that is, the UE enters the cell list), where the request carries the cell list, and the cell list is a moving range in the first state reported by the UE. The AN may generate a moving range determined by the network according to the cell list, where the moving range determined by the network may be the cell list reported by the UE, or may be a TA list or AN ARA list generated according to the cell list reported by the UE.

Optionally, as AN embodiment, after receiving the first message of the UE, the AN device may send a message to the core network device, where the message is used to request the core network device to determine whether to allow the UE to enter the first state, and if the core network device determines to allow the UE to enter the first state, the AN sends a second message to the UE.

In this embodiment of the present invention, optionally, the first information further includes first time period information, where the first time period information is used to indicate a time period that the UE is in the first range. Correspondingly, the AN device determines second time period information according to the first time period information, where the second time period information is used to indicate the time period that the UE is in the first state and is determined by the AN device.

In the embodiment of the present invention, optionally, when the UE determines that the UE moves out of the range identified by the second range information, the UE sends a third message to the AN device, where the third message is used to request to exit from the first state and/or enter into the second state; or, the third message is used to notify the core network device that the UE leaves the second range.

Optionally, as an example, the moving mode is determined by the UE according to historical moving information of the UE, or the moving mode is determined by the UE according to historical moving information of the UE and a time period corresponding to the historical moving information. Correspondingly, the AN equipment determines the mobile mode of the UE according to the mobile mode information, and then when the AN equipment sends a second message to the UE, the second message carries information used for indicating the mobile mode of the UE determined by the AN equipment. Further, optionally, the UE sends the first message to the core network entity when the determined mobility mode changes or the UE enters the time period information corresponding to the mobility mode.

In the implementation of the present invention, optionally, before the UE sends the first message to the access network AN device, as shown in fig. 21, the method 4000 further includes:

s4030, the UE sends a registration message to a core network device through the AN device, where the registration message carries information indicating that the UE supports the first state;

alternatively, it may be understood that the AN device receives a registration message sent by the UE and forwards the registration message to the core network device.

S4040, the UE receives a registration response message sent by the core network device through the AN device, where the registration response message carries information that the core network device supports the first state.

Alternatively, it may be understood that the AN device receives a registration response message sent by the core network device and forwards the registration response message to the UE.

In the embodiment of the present invention, optionally, the first state includes: AN (AN) Level Tracking is carried out on the AN Level position; alternatively, the radio resource management RRC deactivates the Connected state (Inactive Connected); alternatively, Suspend (Suspend) state; or, the connection management CM long connection state; alternatively, CM connected state, RRC deactivated connected state. The AN-level location tracking is that the AN tracks the location of the UE, i.e. when the UE is in the moving range sent by the AN to the UE, the AN does not need to be informed; when the UE moves out of range of the AN, the AN needs to be notified. RRC Inactive Connected is a state of the UE in which no signaling and/or data connection exists between the UE and the AN, but a signaling and/or data connection exists between the AN and the core network entity, and the context of the UE is maintained in both the AN and the core network entity. Suspend is a state of the UE in which a signaling and/or data connection between the UE and the AN does not exist, but a signaling and/or data connection of the UE exists between the AN and a core network entity, and the context of the UE is maintained in both the AN and the core network entity. The CM connection management long connection state is a state of one UE, and in this state, the UE is always in a CM connection state, i.e., an NAS signaling connection state, as viewed by a core network entity. The CM connected state and the RRC radio resource management deactivation connected state are states of one UE, in which the RRC connection between the UE and the AN may be in a disconnected state, and the UE is in a CM connected state, i.e., AN NAS signaling connected state, as viewed by the core network entity.

Fig. 22 is a method of data transmission according to still another embodiment of the present invention, and as shown in fig. 22, the method 5000 includes:

s5010, a user equipment UE sends a first message to a core network device through AN access network AN device, wherein the first message is used for requesting to enter a first state, the first message comprises first information, and the first information is used for the AN device to determine parameter information used by the UE in the first state;

S5020, the core network device sends a second message to AN device, where the second message includes first information, and the first information is used by the AN device to determine parameter information used by the UE in the first state;

S5030, the UE receives a third message sent by the AN device, where the third message includes the parameter information.

Therefore, according to the data transmission method of the embodiment of the present invention, the access network device receives the second message sent by the core network device, determines the parameter information used by the UE in the first state according to the information in the second message, and sends the second message including the parameter information to the UE, so that the user equipment can enter the suspend state, thereby improving the data transmission efficiency and saving the signaling overhead.

In the embodiment of the present invention, optionally, when the UE enters the first state, the UE stops sending the periodic location update request message to the AN apparatus. The UE stopping sending the periodic location update request message to the core network device includes stopping the periodic update timer or setting the periodic update timer to an unavailable state after the UE enters the first state, thereby stopping sending the periodic location update request message to the core network device.

In the embodiment of the present invention, optionally, the UE is determined according to historical movement information of the UE, or the movement pattern is determined by the UE according to the historical movement information of the UE and a time period corresponding to the historical movement information.

Optionally, as AN embodiment, after receiving a first message of the UE, the core network device may send a second message to the AN device, where the second message is used to request the core network device to set the UE in the first state; or the second message is used for informing the access network equipment that the UE enters the first state.

In the embodiment of the present invention, optionally, when the UE determines that the UE moves out of the range identified by the second range information, the UE sends a fourth message to the AN device, where the fourth message is used to request to exit from the first state and/or enter into the second state; or, the fourth message is used to notify the core network device that the UE leaves the second range. Optionally, the core network device sends a fifth message to the AN device, where the fifth message is used to notify the AN device that the UE exits the first state and/or enters the second state.

Optionally, as an embodiment, the moving mode is determined by the UE according to historical moving information of the UE, or the moving mode is determined by the UE according to historical moving information of the UE and a time period corresponding to the historical moving information. Correspondingly, the AN equipment determines the mobile mode of the UE according to the mobile mode information, and then when the AN equipment sends a second message to the UE, the second message carries information used for indicating the mobile mode of the UE determined by the AN equipment. Further, optionally, the UE sends the first message to the core network entity when the determined mobility mode changes or the UE enters the time period information corresponding to the mobility mode.

Optionally, as an embodiment, the traffic information is determined by the UE according to an application currently running by the UE, or the traffic information is determined by the UE according to a historical traffic of the UE, or the traffic information is determined by the UE according to the historical traffic of the UE and a time period corresponding to the historical traffic.

In the implementation of the present invention, optionally, before the UE sends the first message to the access network AN device, as shown in fig. 22, the method 5000 further includes:

s5040, the UE sends a registration message to a core network device through the AN device, where the registration message carries information indicating that the UE supports the first state;

S5050, the UE receives a registration response message sent by the core network device through the AN device, where the registration response message carries information that the core network device supports the first state.

Fig. 23 is a schematic flow chart of a method of data transmission according to an embodiment of the invention, and as shown in fig. 23, the method 6000 includes:

s6010, the UE determines to enter a relative position fixing area;

specifically, the UE determines to move within a predetermined area (Cell List or TA List) within a predetermined time.

S6020, the UE sends a Tracking Area Update (TAU) request message to the CP Fcunction;

specifically, the TAU request message carries information indicating that the UE can enter the Suspend state, a predetermined area of the UE, or optionally carries the latest mobile level of the UE, such as unrestricted Mobility (Unlimited Mobility), restricted Mobility (Limited Mobility), No Mobility (No Mobility).

S6030, the CP Function determines whether to respond to the TAU request message according to the subscription information of the UE;

alternatively, it may be understood that the CP Function determines whether to allow the UE to send the TAU request, and the CP Function may determine the allowed mobility range of the UE according to the predetermined area, and further, may determine the mobility level of the UE.

S6040, the CP Function sends a TAU Accept message to the UE;

the TAU Accept message carries an allowed UE mobility range, and further includes a latest mobility class.

S6050, the UE sends a Service Request message to the CP Function;

specifically, the UE determines whether the duration is within a predetermined period, and if the duration is within the predetermined period, the UE includes indication information for activating the Suspend state in the Service Request message;

s6060, the CP Fucntion sends AN NG2AP message to the AN equipment;

the N2AP message carries the session context, and the UE enters Suspend mode and allowed UE mobility range.

S6070, the AN equipment stores the allowed movement range of the UE;

s6080, establishing a DRB for data transmission between the AN and the UE;

s6090, the AN equipment determines that the Inactive Time of the UE is overtime, and the AN equipment sends RRC Connection Release information to the UE;

the RRC Connection Release message carries a Resume ID allocated to the UE and indication information for indicating that the Release reason is to enter a Suspend state (Suspend for Small Data Transfer) of Small Data transmission. And when the follow-up AN equipment receives the downlink data sent to the UE, paging the UE in the stored moving range of the UE.

The user equipment according to the embodiment of the present invention will be described in detail with reference to fig. 24, and as shown in fig. 24, the user equipment UE 50 includes:

a sending unit 51, configured to send a first message to a core network device through AN access network AN device, where the first message is used to request to enter a first state, where the first message includes first information, and the first information is used for the core network device to determine parameter information used by the UE in the first state;

A receiving unit 52, configured to receive a second message sent by the core network device, where the second message includes the parameter information.

Therefore, the user equipment according to the embodiment of the present invention sends the first message requesting to enter the first state to the core network equipment, and the core network equipment determines the parameter information used by the UE in the first state according to the information in the first message, and sends the second message including the parameter information to the UE, so that the user equipment can enter the suspend state, thereby improving the data transmission efficiency and saving the signaling overhead.

In this embodiment of the present invention, optionally, the sending unit 51 is further configured to: and when the UE enters the first state, stopping sending the periodical position updating request message to the core network equipment.

In this embodiment of the present invention, optionally, the first information includes first range information, where the first range information is used to identify a moving range of the UE in the first state.

In this embodiment of the present invention, optionally, the first range information includes a cell list of the UE in the first state, or the first range information includes a location area list of the UE in the first state.

In this embodiment of the present invention, optionally, the first range information is determined by the UE according to historical movement information of the UE, or the first range information is determined by the UE according to historical movement information of the UE and a time period corresponding to the historical movement information.

In this embodiment of the present invention, optionally, the UE further includes: a determining unit, configured to determine that the UE enters a first moving range indicated by the first moving range information.

In this embodiment of the present invention, optionally, the first information further includes first time period information, where the first time period information is used to indicate a time period that the UE is in the first range.

In this embodiment of the present invention, optionally, the parameter information includes second range information, where the second range information is determined by the AN device according to the first range information, and the second range information is used to identify a moving range of the UE when the UE is in the first state, which is determined by the AN device.

In this embodiment of the present invention, optionally, the sending unit 52 is further configured to: and when the UE judges that the UE moves out of the range identified by the second range information, sending a third message to the core network equipment, wherein the third message is used for requesting to exit the first state and/or enter a second state, or the third message is used for notifying the AN equipment that the UE leaves the second range.

In this embodiment of the present invention, optionally, the moving mode is determined by the UE according to historical moving information of the UE, or the moving mode is determined by the UE according to historical moving information of the UE and a time period corresponding to the historical moving information.

In this embodiment of the present invention, optionally, before the sending unit 52 sends the first message to the core network device through the access network AN device, the sending unit 52 is further configured to: sending a registration message to the core network device, wherein the registration message carries information for indicating that the UE supports the first state;

wherein the receiving unit 51 is configured to: and receiving a registration response message sent by the core network equipment, wherein the registration response message carries the information that the core network equipment supports the first state.

In the embodiment of the present invention, optionally, the first state includes: AN-level location tracking; or, the radio resource management RRC deactivates the connected state; alternatively, a suspend state; or, the connection management CM long connection state; alternatively, CM connected state, RRC deactivated connected state.

It should be understood that the user equipment 50 according to the embodiment of the present invention may correspond to the method 3000 for performing data transmission in the embodiment of the present invention, and the above and other operations and/or functions of each module in the user equipment 50 are respectively for implementing corresponding processes performed by the user equipment in the method 3000, and are not described herein again for brevity.

Fig. 25 is a user equipment according to still another embodiment of the present invention, and as shown in fig. 25, the user equipment UE 60 includes:

a sending unit 61, configured to send a first message to AN access network AN device, where the first message is used to request to enter a first state, where the first message includes first information, and the first information is used for the AN device to determine parameter information used by the UE in the first state;

a receiving unit 62, configured to receive a second message sent by the AN apparatus, where the second message is AN acknowledgement message of the first message, and the second message includes the parameter information.

Therefore, the user equipment according to the embodiment of the present invention sends the first message requesting to enter the first state to the access network equipment, and the access network equipment determines the parameter information used by the UE in the first state according to the information in the first message, and sends the second message including the parameter information to the UE, so that the user equipment can enter the suspend state, thereby improving the data transmission efficiency and saving the signaling overhead.

In this embodiment of the present invention, optionally, the sending unit 61 is further configured to: and when the UE enters the first state, stopping sending the periodical position updating request message to the core network equipment.

In this embodiment of the present invention, optionally, the UE further includes a determining unit, configured to determine that the UE enters the first moving range indicated by the first moving range information.

In this embodiment of the present invention, optionally, the parameter information includes second range information, where the second range information is determined by the AN or the core network device according to the first range information, and the second range information is used to identify a moving range of the UE when the UE is in the first state, which is determined by the AN or the core network device.

In this embodiment of the present invention, optionally, the sending unit 62 is further configured to: and when the UE judges that the UE moves out of the range identified by the second range information, sending a third message to the core network equipment, wherein the third message is used for requesting to exit the first state and/or enter the second state, or the third message is used for notifying the core network equipment that the UE leaves the second range.

In this embodiment of the present invention, optionally, before the sending unit 62 sends the first message to the AN device, the sending unit 62 is further configured to: sending a registration message to a core network device through the AN device, wherein the registration message carries information that the UE supports the first state;

Wherein the receiving unit 61 is further configured to: and receiving a registration response message sent by the core network device through the AN device, wherein the registration response message carries information that the core network device supports the first state.

It should be understood that the ue 60 according to the embodiment of the present invention may correspond to the method 4000 for performing data transmission according to the embodiment of the present invention, and the above and other operations and/or functions of each module in the ue 60 are respectively for implementing corresponding processes performed by the ue in the method 4000, and are not described herein again for brevity.

Fig. 26 shows a user equipment UE according to still another embodiment of the present invention, and as shown in fig. 26, the user equipment 70 includes:

a sending unit 71, configured to send a first message to a core network device through AN access network, AN, device, where the first message is used to request to enter a first state, where the first message includes first information, and the first information is used for the AN device to determine parameter information used by the UE in the first state;

A receiving unit 72, configured to receive a second message sent by the AN device, where the second message includes the parameter information.

Therefore, according to the embodiment of the present invention, the UE sends the first message requesting to enter the first state to the core network device, and receives the parameter information used by the access network device in the first state, which is determined by the access network device according to the information in the first message, so that the UE can enter the suspend state, thereby improving data transmission efficiency and saving signaling overhead.

In this embodiment of the present invention, optionally, the sending unit 71 is further configured to: and when the UE enters the first state, stopping sending the periodic location updating request message to the core network equipment.

In this embodiment of the present invention, optionally, the UE further includes: a determining unit, configured to determine that the UE enters the indicated first moving range of the first moving range information.

In this embodiment of the present invention, optionally, the sending unit 71 is further configured to: and when the UE judges that the UE moves out of the range of the second range information identifier, sending a third message to the core network equipment, wherein the third message is used for requesting to exit the first state and/or enter the second state, or the third message is used for notifying the core network equipment that the UE leaves the range of the second range information identifier.

In this embodiment of the present invention, optionally, the traffic information is determined by the UE according to an application currently running by the UE, or the traffic information is determined by the UE according to a historical traffic of the UE, or the traffic information is determined by the UE according to the historical traffic of the UE and a time period corresponding to the historical traffic.

In this embodiment of the present invention, optionally, before the sending unit sends the first message to the core network device through the access network AN device, the sending unit 71 is further configured to: sending a registration message to the core network device through the AN device, wherein the registration message carries information that the UE supports the first state;

the receiving unit 72 is further configured to receive a registration response message sent by the core network device through the AN device, where the registration response message carries information that the core network device supports the first state.

It should be understood that the user equipment 70 according to the embodiment of the present invention may correspond to the method 5000 for performing data transmission in the embodiment of the present invention, and the above and other operations and/or functions of each module in the user equipment 70 are respectively for implementing corresponding processes performed by the user equipment in the method 5000, and are not described herein again for brevity.

Fig. 27 shows a core network device according to still another embodiment of the present invention, and as shown in fig. 27, the core network device 80 includes:

the receiving unit 81: the first message is used for receiving a first message sent by User Equipment (UE) through Access Network (AN) equipment, wherein the first message is used for requesting to enter a first state, the first message comprises first information, and the first information is used for the core network equipment to determine parameter information used by the UE in the first state;

the determination unit 82: the parameter information used by the UE in the first state is determined according to the first information;

The transmission unit 83: and configured to send a second message to the UE, where the second message includes the parameter information.

Therefore, the core network device according to the embodiment of the present invention receives a first message requesting to enter the first state sent by the user equipment, and the core network device determines the parameter information used by the UE in the first state according to the information in the first message, and sends a second message including the parameter information to the UE, so that the user equipment can enter the suspend state, thereby improving data transmission efficiency and saving signaling overhead.

In this embodiment of the present invention, optionally, the first information further includes first time period information, where the first time period information is used to indicate a time period that the UE is in the first range;

wherein, in terms of determining, according to the first information, parameter information used by the UE in the first state, the determining unit 82 is specifically configured to: and determining second time period information according to the first time period information, wherein the second time period information is used for indicating the time period of the UE in the first state determined by the determining unit.

In this embodiment of the present invention, optionally, in terms of determining, according to the first information, parameter information used by the UE in the first state, the determining unit 82 is specifically configured to: and determining second range information according to the first range information, wherein the second range information is used for indicating the moving range of the UE determined by the determining unit when the UE is in the first state.

In this embodiment of the present invention, optionally, in terms of determining, according to the first information, parameter information used by the UE in the first state, the sending unit 83 is configured to: sending the first range information to the AN equipment to enable the AN equipment to determine second range information, wherein the second range information is used for indicating a moving range of the UE determined by the AN equipment when the UE is in the first state;

The receiving unit 81 is configured to receive a message sent by the AN device and including the second range information;

the determining unit 82 is configured to determine the second range information from the message.

In this embodiment of the present invention, optionally, the receiving unit 81 is further configured to: and receiving a third message sent by the UE, where the third message is used to request to exit the first state and/or enter the second state, or the third message is used to notify the core network device that the UE leaves the second range.

In this embodiment of the present invention, optionally, the first information includes mobility mode information, where the mobility mode information is used to indicate a mobility mode of the UE, and the mobility mode includes a mobility frequency or a mobility range of the UE;

wherein, in terms of determining, according to the first information, parameter information used by the UE in the first state, the determining unit 82 is specifically configured to: determining a mobile mode of the UE according to the mobile mode information; wherein the parameter information includes information indicating the movement pattern of the UE determined by the determination unit.

In this embodiment of the present invention, optionally, before the receiving unit 81 receives the first message sent by the user equipment UE through the access network AN device, the receiving unit 81 is further configured to: receiving a registration message sent by the UE, wherein the registration message carries information for indicating that the UE supports the first state;

wherein, the sending unit 82 is further configured to: and sending a registration response message to the UE, wherein the registration response message carries the information that the core network entity supports the first state.

It should be understood that the core network device 80 according to the embodiment of the present invention may correspond to the method 3000 for performing data transmission in the embodiment of the present invention, and the above and other operations and/or functions of each module in the core network device 80 are respectively for implementing corresponding processes performed by the core network device in the method 3000, and are not described herein again for brevity.

Fig. 28 shows an access network apparatus according to still another embodiment of the present invention, and as shown in fig. 28, the access network apparatus 90 includes:

A receiving unit 91, configured to receive a first message sent by a UE, where the first message is used to request to enter a first state, and the first message includes first information, and the first information is used by the AN apparatus to determine parameter information used by the UE in the first state;

a determining unit 92, configured to determine, according to the first information, parameter information used by the UE in the first state;

a sending unit 93, configured to send a second message to the UE, where the second message includes the parameter information.

Therefore, the access network device according to the embodiment of the present invention receives a first message requesting to enter the first state sent by the user equipment, and the access network device determines the parameter information used by the UE in the first state according to the information in the first message, and sends a second message including the parameter information to the UE, so that the user equipment can enter the suspend state, thereby improving the data transmission efficiency and saving the signaling overhead.

wherein, in terms of determining, according to the first information, parameter information used by the UE in the first state, the determining unit 92 is specifically configured to: and determining second time period information according to the first time period information, wherein the second time period information is used for indicating the time period which is determined by the AN and is in the first state by the UE.

In this embodiment of the present invention, optionally, in terms of determining, according to the first information, parameter information used by the UE in the first state, the determining unit 92 is specifically configured to: and determining second range information according to the first information, wherein the second range information is used for identifying the moving range of the UE determined by the AN equipment when the UE is in the first state.

In this embodiment of the present invention, optionally, the receiving unit 91 is further configured to: and receiving a third message sent by the UE, where the third message is used to request to exit the first state and/or enter the second state, or the third message is used to notify the AN device that the UE leaves the second range.

wherein, in terms of determining, according to the first information, parameter information used by the UE in the first state, the determining unit 92 is specifically configured to: determining a mobile mode of the UE according to the mobile mode information; wherein the parameter information includes information indicating the movement pattern of the UE determined by the determination unit.

In this embodiment of the present invention, optionally, before the receiving unit 91 receives the first message sent by the user equipment UE, the receiving unit 91 is further configured to: receiving a registration message sent by the UE; the sending unit is further configured to: the core network equipment forwards the registration message, wherein the registration message carries the information that the UE supports the first state;

the receiving unit 91 is further configured to: receiving a registration response message sent by the core network equipment; the sending unit 93 is further configured to: and forwarding the registration response message to the UE, where the registration response message carries information that the core network device supports the first state.

It should be understood that the access network device 90 according to the embodiment of the present invention may correspond to the method 4000 for performing data transmission in the embodiment of the present invention, and the above and other operations and/or functions of each module in the access network device 90 are respectively for implementing corresponding processes performed by the core network device in the method 4000, and are not described herein again for brevity.

Fig. 29 shows an access network apparatus according to still another embodiment of the present invention, and as shown in fig. 29, an access network apparatus 1000 includes

A receiving unit 1100, configured to receive a first message sent by a core network device, where the first message includes first information, and the first information is used for the AN device to determine parameter information used by the UE in the first state;

a determining unit 1200, configured to determine, according to the first information, parameter information used by the UE in the first state;

a sending unit 1300, configured to send a second message to the UE, where the second message includes the parameter information.

Therefore, the access network device according to the embodiment of the present invention receives the message sent by the core network device for requesting to set the UE in the first state, determines the parameter information used by the UE in the first state according to the information in the message, and sends the second message including the parameter information to the UE, so that the user equipment can enter the suspend state, thereby improving the data transmission efficiency and saving the signaling overhead.

In this embodiment of the present invention, optionally, the first information further includes first period information, where the first period information is used to indicate a period of time when the UE is in the first range;

wherein, in terms of determining, according to the first information, parameter information used by the UE in the first state, the determining unit 1200 is specifically configured to: and determining second time period information according to the first time period information, wherein the second time period information is used for indicating the time period, determined by the AN, of the UE in the first state.

In this embodiment of the present invention, optionally, in terms of determining, according to the first information, parameter information used by the UE in the first state, the determining unit 1200 is specifically configured to: and determining second range information according to the first information, wherein the second range information is used for identifying the moving range of the UE determined by the AN equipment when the UE is in the first state.

In this embodiment of the present invention, optionally, the sending unit 1300 is further configured to: and receiving a third message sent by the UE or the core network device, where the third message is used to request to exit the first state and/or enter a second state, or the third message is used to notify the AN device that the UE leaves the second range.

In this embodiment of the present invention, optionally, the first information includes mobility mode information, where the mobility mode information is used to indicate a mobility mode of the UE, and the mobility mode includes a mobility frequency or a mobility range;

wherein, in terms of determining, according to the first information, parameter information used by the UE in the first state, the determining unit 1200 is specifically configured to: determining a movement mode of the UE according to the movement mode information;

Wherein the parameter information includes information indicating a movement pattern of the UE determined by the AN device.

In this embodiment of the present invention, optionally, before the receiving unit 1100 receives the first message sent by the core network device, the receiving unit 1100 is further configured to: receiving a registration message sent by the UE, and forwarding the registration message to core network equipment, wherein the registration message carries information that the UE supports the first state; receiving a registration response message sent by the core network equipment; the sending unit 1300 is configured to forward the registration response message to the UE, where the registration response message carries information that the core network device supports the first state.

Fig. 30 is a schematic block diagram of a user equipment of another embodiment of the present invention. The user equipment of fig. 30 may perform the method performed by the user equipment in the flows of fig. 20. The user equipment 300 of fig. 30 includes a transceiver 310, a processor 320, and a memory 330. Processor 320 controls the operation of user equipment 300 and may be used to process signals. Memory 330 may include both read-only memory and random-access memory and provides instructions and data to processor 320. The various components of the user device 300 are coupled together by a bus system 340, wherein the bus system 340 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 340 in the figures.

The method disclosed in the above embodiments of the present invention may be applied to the processor 320, or implemented by the processor 320. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 320. The processor 320 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 330, and the processor 320 reads the information in the memory 330 and completes the steps of the method in combination with the hardware.

Specifically, the transceiver 310 is configured to send a first message to a core network device through AN access network AN device, where the first message is used to request to enter a first state, where the first message includes first information, and the first information is used for the core network device to determine parameter information used by the UE in the first state; the transceiver 310 is further configured to receive a second message sent by the core network device, where the second message is an acknowledgement message of the first message, and the second message includes the parameter information.

It should be understood that the ue 300 according to the embodiment of the present invention may correspond to the ue 50 according to the embodiment of the present invention, and may correspond to a corresponding main body in the method for performing data transmission according to the embodiment of the present invention, and the above and other operations and/or functions of each module in the ue 300 are respectively for implementing corresponding flows in the method 3000, and are not described herein again for brevity.

Alternatively, the transceiver 310: the AN equipment is used for sending a first message to the AN equipment of the access network, wherein the first message is used for requesting to enter a first state and comprises first information, and the first information is used for the AN equipment to determine parameter information used by the UE in the first state; the transceiver 310 is further configured to receive a second message sent by the AN apparatus, where the second message is AN acknowledgement message of the first message, and the second message includes the parameter information.

It should be understood that the ue 300 according to the embodiment of the present invention may correspond to the ue 60 according to the embodiment of the present invention, and may correspond to a corresponding main body in the method for performing data transmission according to the embodiment of the present invention, and the above and other operations and/or functions of each module in the ue 300 are respectively for implementing corresponding flows in the method 4000, and are not described herein again for brevity.

Or, the transceiver 310 is configured to send a first message to a core network device through AN access network, AN, device, where the first message is used to request to enter a first state, where the first message includes first information, and the first information is used for the AN device to determine parameter information used by the UE in the first state; the transceiver 310 is further configured to receive a second message sent by the AN apparatus, where the second message includes the parameter information.

It should be understood that the ue 300 according to the embodiment of the present invention may correspond to the ue 70 according to the embodiment of the present invention, and may correspond to a corresponding main body in the method for performing data transmission according to the embodiment of the present invention, and the above and other operations and/or functions of each module in the ue 300 are respectively for implementing corresponding processes in the method 5000, and are not described herein again for brevity.

Fig. 31 is a schematic block diagram of a core network device according to an embodiment of the present invention. The core network device in fig. 31 may execute the method executed by the core network device in each flow in fig. 20. The core network apparatus 400 of fig. 31 includes a transceiver 410, a processor 420, and a memory 430. The processor 420 controls the operation of the core network apparatus 400 and may be used to process signals. Memory 430 may include both read-only memory and random-access memory, and provides instructions and data to processor 420. The various components of the core network device 400 are coupled together by a bus system 440, wherein the bus system 440 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled in the figure as bus system 440.

The method disclosed in the above embodiments of the present invention may be applied to the processor 420, or implemented by the processor 420. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 420. The processor 420 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 430, and the processor 420 reads the information in the memory 430 and performs the steps of the above method in combination with the hardware thereof.

Specifically, the transceiver 410: receiving a first message sent by User Equipment (UE) through Access Network (AN) equipment, wherein the first message is used for requesting to enter a first state, and the first message comprises first information which is used for the core network equipment to determine parameter information used by the UE in the first state; the processor 420: the parameter information used by the UE in the first state is determined according to the first information; the transceiver 410: and further configured to send a second message to the UE, where the second message is a confirmation message of the first message, and the second message includes the parameter information.

It should be understood that the core network device 400 according to the embodiment of the present invention may correspond to the core network device 70 according to the embodiment of the present invention, and may correspond to a corresponding main body in the method for performing data transmission according to the embodiment of the present invention, and the above and other operations and/or functions of each module in the core network device 400 are respectively for implementing corresponding flows in the method 3000, and are not described herein again for brevity.

Fig. 32 is a schematic block diagram of an access network apparatus of an embodiment of the present invention. The access network device of fig. 32 may perform the method performed by the access network device in the flows of fig. 21. The access network apparatus 500 of fig. 32 includes a transceiver 510, a processor 520, and a memory 530. The processor 520 controls the operation of the access network apparatus 500 and may be used to process signals. Memory 530 may include both read-only memory and random access memory, and provides instructions and data to processor 520. The various components of the access network device 500 are coupled together by a bus system 540, wherein the bus system 540 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 540 in the figures.

The method disclosed in the above embodiments of the present invention may be applied to the processor 520, or implemented by the processor 520. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 520. The processor 520 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 530, and the processor 520 reads the information in the memory 530 and performs the steps of the above method in combination with the hardware thereof.

Specifically, the transceiver 410: the AN equipment is used for receiving a first message sent by the UE, wherein the first message is used for requesting to enter a first state and comprises first information, and the first information is used for the AN equipment to determine parameter information used by the UE in the first state; the processor 520, configured to determine, according to the first information, parameter information used by the UE in the first state; the transceiver 510 is further configured to send a second message to the UE, where the second message includes the parameter information.

It should be understood that the access network device 400 according to the embodiment of the present invention may correspond to the access network device 90 according to the embodiment of the present invention, and may correspond to a corresponding main body in the method for performing data transmission according to the embodiment of the present invention, and the above and other operations and/or functions of each module in the access network device 400 are respectively for implementing corresponding flows in the method 4000, and are not described herein again for brevity.

Or, the transceiver 510 is configured to receive a first message sent by a core network device, where the first message includes first information, and the first information is used for the AN device to determine parameter information used by the UE in the first state; the processor 520 is configured to determine, according to the first information, parameter information used by the UE in the first state; the transceiver 510 is further configured to send a second message to the UE, where the second message includes the parameter information.

Therefore, the access network device according to the embodiment of the present invention receives the message sent by the core network device, determines the parameter information used by the UE in the first state according to the information in the message, and sends the second message including the parameter information to the UE, so that the user equipment can enter the suspend state, thereby improving the data transmission efficiency and saving the signaling overhead.

It should be understood that the access network device 500 according to the embodiment of the present invention may correspond to the access network device 1000 according to the embodiment of the present invention, and may correspond to a corresponding main body in the method for performing data transmission according to the embodiment of the present invention, and the above and other operations and/or functions of each module in the access network device 500 are respectively for implementing corresponding procedures in the method 5000, and are not described herein again for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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 invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method of transmitting data, comprising:

receiving, by a first radio access network RAN device, a first message sent by a user equipment UE, where the first message includes encrypted data and an encrypted first identifier, and the first identifier is a transmission path information identifier of the data;

the first RAN device determines, according to the encrypted first identifier, transmission path information of the data corresponding to the encrypted first identifier, where the transmission path information of the data includes address information of a next hop forwarding device of the data and a third identifier allocated to the UE by the next hop forwarding device, and the third identifier uniquely identifies one bearer of the UE on a core network device side;

and the first RAN equipment forwards the encrypted data according to the transmission path information of the data.

2. The method of claim 1, wherein the receiving, by the first radio access network RAN equipment, a first message sent by a user equipment UE, the first message including data and a first identifier, comprises:

the first RAN device receives the first message sent by the UE, where the first message includes the data encrypted by a first key group, the first identifier encrypted by the first key group, an identifier of the UE, and an identifier of a core network device;

wherein, the determining, by the first RAN device, the transmission path information of the data according to the first identifier includes:

the first RAN device sends, to the core network device, a second message according to the identifier of the core network device, where the second message includes the identifier of the UE and the first identifier encrypted by the first key group, so that the core network device sends, to the first RAN device, context information of the UE after verifying that the UE is legitimate according to the identifier of the UE and the first identifier encrypted by the first key group, where the context information of the UE includes the first key group, the first identifier, and transmission path information corresponding to the first identifier;

And the first RAN equipment determines the transmission path information corresponding to the first identifier as the transmission path information of the data.

3. The method of claim 2, wherein sending the second message to the core network device comprises:

and when the first RAN equipment determines that the context information of the UE is not stored according to the identity of the UE, the first RAN equipment sends the second message to the core network equipment.

4. The method of claim 1, wherein prior to the first RAN device receiving the first message sent by the UE, the method further comprises:

the first RAN equipment receives the UE identification sent by the UE;

the first RAN device sends feedback information to the UE, where the feedback information is used to instruct the first RAN device to determine, according to the identity of the UE, whether a determination result of context information of the UE is stored, so that when the feedback information indicates that the first RAN device does not store the context information of the UE, the UE requests a core network device to send the context information of the UE to the first RAN device, where the context information of the UE includes the first identity and transmission path information corresponding to the first identity;

5. The method of claim 1, wherein prior to the first RAN device receiving the first message sent by the UE, the method further comprises:

the first RAN equipment receives the UE identification sent by the UE;

the first RAN equipment sends feedback information to the UE, wherein the feedback information is used for indicating the first RAN equipment to judge whether a judgment result of context information of the UE is stored or not according to the identity of the UE;

when the feedback information indicates that the first RAN device does not store the context information of the UE, the first RAN device receives a third message sent by the UE, where the third message includes an identifier of the UE, the first identifier encrypted by a second key group, and an identifier of a core network device;

the first RAN device sends, to the core network device, a fourth message according to the identifier of the core network device, where the fourth message includes the identifier of the UE and the first identifier encrypted by the second key group, so that the core network device sends, to the first RAN device, context information of the UE after verifying that the UE is legitimate according to the identifier of the UE and the first identifier encrypted by the second key group, where the context information of the UE includes the first identifier and transmission path information corresponding to the first identifier;

6. The method of claim 1, wherein the receiving, by the first radio access network RAN equipment, a first message sent by a user equipment UE, the first message including data and a first identifier, comprises:

a first RAN device receives the first message sent by a UE, where the first message includes the data encrypted by a first key group, the first identifier encrypted by the first key group, an identifier of the UE, and an identifier of a second RAN device, and the second RAN device is a RAN device determined by the UE and storing context information of the UE;

when the first RAN device determines that the context information of the UE is not stored according to the identifier of the UE, the first RAN device sends a fifth message to the second RAN device according to the identifier of the second RAN device, where the fifth message includes the identifier of the UE and the first identifier encrypted by the first key group, so that the second RAN device sends the context information of the UE to the first RAN device after determining that the UE is legal according to the identifier of the UE and the first identifier encrypted by the first key group, and the context information of the UE includes the first key group, the first identifier, and transmission path information corresponding to the first identifier;

7. The method of claim 1, wherein the receiving, by the first radio access network RAN equipment, a first message sent by a user equipment UE, the first message including data and a first identifier, comprises:

the first RAN device receives the first message sent by a UE, where the first message includes the data encrypted by the first key group, the first identifier encrypted by the first key group, and context information of the UE encrypted by a public key of the first RAN device, where the context information of the UE includes the first key group, and before the first RAN device receives the first message sent by the UE, the method further includes:

the first RAN equipment receives the UE identification sent by the UE;

the first RAN device sends feedback information to the UE, where the feedback information is used to instruct the first RAN device to determine, according to the identity of the UE, whether a determination result of context information of the UE is stored, so that when the feedback information indicates that the first RAN device does not store the context information of the UE, the UE encrypts the context of the UE using a public key of the first RAN device;

Wherein, the determining, by the first RAN device, the transmission path information of the data packet according to the first identifier includes:

the first RAN equipment decrypts the context information of the UE by adopting a private key corresponding to the public key, and acquires the first key group included in the context information of the UE;

the first RAN equipment decrypts the first identifier encrypted by the first key group by using the first key group to obtain the first identifier;

and the first RAN equipment determines the transmission path information of the data according to the corresponding relation between the first identifier and the transmission path information.

8. The method according to claim 1, wherein context information of the UE is stored in both the first RAN device and the UE, and the context information of the UE includes a first key group, the first identifier, and transmission path information corresponding to the first identifier, and before the first RAN device receives the first message sent by the UE, the method further includes:

the first RAN device receives a sixth message sent by the UE, where the sixth message is used to request the first RAN device to recover a signaling connection between the first RAN device and the UE;

The first RAN device sends a seventh message to the UE, where the seventh message is used to indicate that the signaling connection between the first RAN device and the UE is recovered, so that the UE encrypts the data and the first identifier by using the first key group after receiving the seventh message;

9. The method according to any of claims 1-8, wherein before the first RAN device forwards the data according to the transmission path information of the data, the method further comprises:

the first RAN device obtains a second identifier of the UE, where the second identifier is used for determining, when the first RAN device receives downlink data, that a target receiving device of the downlink data is the UE;

wherein the forwarding, by the first RAN device, the data according to the transmission path information of the data includes:

the first RAN equipment determines next hop forwarding equipment of the data according to the transmission path information of the data;

And the first RAN equipment sends the data and the second identifier to the next hop forwarding equipment.

10. The method of any of claims 1-9, wherein the third identifier is used for the next hop forwarding device to determine that the data belongs to the UE after receiving the data sent by the first RAN device.

11. A method of transmitting data, comprising:

a User Equipment (UE) determines a first identifier corresponding to data, wherein the first identifier is used for determining transmission path information of the data corresponding to the first identifier by a first Radio Access Network (RAN) device according to the first identifier, the first identifier is a transmission path information identifier of the data, the transmission path information of the data comprises address information of a next hop forwarding device of the data and a third identifier allocated to the UE by the next hop forwarding device, and the third identifier uniquely identifies one bearer of the UE on a core network device side;

and the UE sends a first message to the first RAN device, wherein the first message comprises the encrypted data and the encrypted first identifier.

12. The method of claim 11, further comprising:

the UE encrypts the data and the first identifier by using a first key group;

wherein the sending, by the UE, a first message to the first RAN device, where the first message includes the data and the first identifier, and includes:

the UE sends a first message to the first RAN device, where the first message includes the data encrypted by the UE using the first key group, the first identifier encrypted by the UE using the first key group, an identifier of the UE, and an identifier of a core network device, so that the first RAN device obtains context information of the UE according to the identifier of the UE, the identifier of the core network device, and the first identifier encrypted by the UE using the first key group, where the context information of the UE includes the first key group, the first identifier, and transmission path information corresponding to the first identifier.

13. The method of claim 11, wherein prior to the UE sending the first message to the first RAN device, the method further comprises:

The UE sends the identity of the UE to the first RAN equipment;

the UE receives feedback information sent by the first RAN device, where the feedback information is used to instruct the first RAN device to determine, according to an identifier of the UE, whether a determination result of context information of the UE is stored, where the context information of the UE includes the first identifier and transmission path information corresponding to the first identifier;

when the feedback information indicates that the first RAN device does not store the context information of the UE, the UE sends a second message to the core network device, where the second message is used to request the core network device to send the context information of the UE to the first RAN device.

14. The method of claim 11, wherein prior to the UE sending the first message to the first RAN device, the method further comprises:

the UE sends the identity of the UE to the first RAN equipment;

the UE receives feedback information sent by the first RAN equipment, wherein the feedback information is used for indicating the first RAN equipment to judge whether a judgment result of context information of the UE is stored or not according to the identity of the UE;

When the feedback information indicates that the first RAN device does not store the context information of the UE, the UE sends a third message to the first RAN device, where the third message includes an identifier of the UE, the first identifier encrypted by a second key group, and an identifier of a core network device, so that the first RAN device obtains the context information of the UE according to the identifier of the UE, the first identifier encrypted by the second key group, and the identifier of the core network device, and the context information of the UE includes the first identifier and transmission path information corresponding to the first identifier.

15. The method of claim 11, further comprising:

the UE encrypts the data and the first identifier by using a first key group;

the UE sends a first message to the first RAN device, where the first message includes the data encrypted by the UE using the first key group, the first identifier encrypted by the UE using the first key group, an identifier of the UE, and an identifier of a second RAN device, and the second RAN device is a RAN device determined by the UE and storing context information of the UE, so that the first RAN device obtains the context information of the UE according to the identifier of the UE, the first identifier encrypted by the UE using the first key group, and the identifier of the second RAN device, and the context information of the UE includes the first key group, the first identifier, and transmission path information corresponding to the first identifier.

16. The method of claim 11, further comprising:

the UE sends the identity of the UE to the first RAN equipment;

when the feedback information indicates that the first RAN equipment does not store the context information of the UE, the UE uses the public key of the first RAN equipment to encrypt the context of the UE, and the context information of the UE comprises a first key group;

the UE sends a first message to the first RAN device, where the first message includes the data encrypted by the UE using the first key group, the first identifier encrypted by the UE using the first key group, and context information of the UE encrypted by the UE using a public key of the first RAN device, so that the first RAN device obtains transmission path information of the data according to the context information of the UE.

17. The method of claim 11, wherein context information of the UE is stored in both the first RAN device and the UE, and wherein the context information of the UE includes a first key group, the first identifier, and transmission path information corresponding to the first identifier, and before the UE sends the first message to the first RAN device, the method further comprises:

the UE sends a fourth message to the first RAN equipment, wherein the fourth message is used for requesting the first RAN equipment to recover the connection between the UE and the first RAN equipment;

the UE receives a fifth message sent by the first RAN equipment, wherein the fifth message is used for indicating that the connection between the UE and the first RAN equipment is recovered;

wherein the sending, by the UE, a first message to the first RAN device includes:

the UE sends the first message to the first RAN device over the connection.

18. The method of claim 17, wherein prior to the UE sending a fourth message to the first RAN device, the method further comprises:

the UE sending a sixth message to the first RAN device, where the sixth message is used to instruct the first RAN device to set the UE to a suspended state;

And the UE receives a seventh message sent by the first RAN equipment, wherein the seventh message is used for indicating that the first RAN equipment sets the UE in a suspended state.

19. The method of claim 18, wherein the UE sends a sixth message to the first RAN device, comprising:

and when the UE determines that the movement range of the UE within a preset time period is within a preset range, the UE sends the sixth message to the first RAN equipment.

20. The method of any of claims 11-19, wherein the third identifier is used for determining, by the next hop forwarding device, that the data belongs to the UE after receiving the data sent by the first RAN device.

21. A radio access network, RAN, device, comprising:

a receiving and sending unit, configured to receive a first message sent by a user equipment UE, where the first message includes encrypted data and an encrypted first identifier, and the first identifier is a transmission path information identifier of the data;

a processing unit, configured to determine, according to the encrypted first identifier, transmission path information of the data corresponding to the encrypted first identifier, where the transmission path information of the data includes address information of a next hop forwarding device of the data and a third identifier allocated to the UE by the next hop forwarding device, and the third identifier uniquely identifies a bearer of the UE on a core network device side;

The transceiving unit is further configured to forward the encrypted data according to the transmission path information of the data.

22. The RAN apparatus of claim 21, wherein the transceiver unit is specifically configured to:

receiving the first message sent by the UE, where the first message includes the data encrypted by the first key group, the first identifier encrypted by the first key group, the identifier of the UE, and the identifier of the core network device;

sending a second message to the core network device according to the identifier of the core network device, where the second message includes the identifier of the UE and the first identifier encrypted by the first key group, so that the core network device sends context information of the UE to the RAN device after verifying that the UE is legal according to the identifier of the UE and the first identifier encrypted by the first key group, where the context information of the UE includes the first key group, the first identifier, and transmission path information corresponding to the first identifier;

the processing unit is configured to determine the transmission path information corresponding to the first identifier as the transmission path information of the data.

23. The RAN apparatus of claim 22, wherein the processing unit is further configured to:

determining whether the RAN equipment stores context information of the UE according to the identity of the UE;

wherein the transceiver unit is further configured to:

and when the processing unit determines that the RAN device does not store the context information of the UE, sending the second message to the core network device.

24. The RAN apparatus of claim 21, wherein before the transceiver unit receives the first message sent by the UE, the transceiver unit is further configured to:

receiving the identity of the UE sent by the UE;

sending feedback information to the UE, where the feedback information is used to instruct the processing unit to determine, according to the identifier of the UE, whether the RAN device stores the result of determining the context information of the UE, so that the UE requests a core network device to send the context information of the UE to the RAN device when the feedback information indicates that the RAN device does not store the context information of the UE, where the context information of the UE includes the first identifier and transmission path information corresponding to the first identifier;

Wherein the processing unit is specifically configured to:

and determining the transmission path information corresponding to the first identifier as the transmission path information of the data.

25. The RAN apparatus of claim 21, wherein before the transceiver unit receives the first message sent by the UE, the transceiver unit is further configured to:

receiving the identity of the UE sent by the UE;

sending feedback information to the UE, wherein the feedback information is used for indicating the processing unit to judge whether the RAN equipment stores a judgment result of the context information of the UE according to the identification of the UE;

when the feedback information indicates that the RAN device does not store the context information of the UE, receiving a third message sent by the UE, where the third message includes an identifier of the UE, the first identifier encrypted by a second key group, and an identifier of a core network device;

sending a fourth message to the core network device according to the identifier of the core network device, where the fourth message includes the identifier of the UE and the first identifier encrypted by the second key group, so that the core network device sends context information of the UE to the RAN device after verifying that the UE is legal according to the identifier of the UE and the first identifier encrypted by the second key group, where the context information of the UE includes the first identifier and transmission path information corresponding to the first identifier;

Wherein the processing unit is specifically configured to:

26. The RAN apparatus of claim 21, wherein the transceiver unit is specifically configured to:

receiving the first message sent by the UE, where the first message includes the data encrypted by a first key group, the first identifier encrypted by the first key group, an identifier of the UE, and an identifier of a second RAN device, and the second RAN device is a RAN device determined by the UE and storing context information of the UE;

when the processing unit determines that the RAN device does not store the context information of the UE according to the identifier of the UE, sending a fifth message to the second RAN device according to the identifier of the second RAN device, where the fifth message includes the identifier of the UE and the first identifier encrypted by the first key group, so that the second RAN device determines that the UE is legal according to the identifier of the UE and the first identifier encrypted by the first key group and sends the context information of the UE to the RAN device, and the context information of the UE includes the first key group, the first identifier, and transmission path information corresponding to the first identifier;

Wherein the processing unit is specifically configured to: and determining the transmission path information corresponding to the first identifier as the transmission path information of the data.

27. The RAN apparatus of claim 21, wherein the transceiver unit is specifically configured to:

receiving the first message sent by the UE, where the first message includes the data encrypted by the first key group, the first identifier encrypted by the first key group, and context information of the UE encrypted by a public key of the RAN device, and the context information of the UE includes the first key group;

wherein, before the transceiver unit receives the first message sent by the UE, the transceiver unit is further configured to:

receiving the identity of the UE sent by the UE;

sending feedback information to the UE, where the feedback information is used to instruct the processing unit to determine, according to the identifier of the UE, a determination result of whether the RAN device stores the context information of the UE, so that when the feedback information indicates that the RAN device does not store the context information of the UE, the UE encrypts the context of the UE using a public key of the RAN device;

Wherein the processing unit is specifically configured to:

decrypting the context information of the UE by using a private key corresponding to the public key to obtain the first key group included in the context information of the UE;

decrypting the first identifier encrypted by the first key group by using the first key group to obtain the first identifier;

and determining the transmission path information of the data according to the corresponding relation between the first identifier and the transmission path information.

28. The RAN apparatus of claim 21, wherein context information of the UE is stored in both the RAN apparatus and the UE, and the context information of the UE includes a first key group, the first identifier, and transmission path information corresponding to the first identifier, and before the transceiver unit receives the first message sent by the UE, the transceiver unit is further configured to:

receiving a sixth message sent by the UE, where the sixth message is used to request the RAN device to recover a signaling connection between the RAN device and the UE;

sending a seventh message to the UE, where the seventh message is used to indicate that the signaling connection between the RAN device and the UE is recovered, so that the UE encrypts the data and the first identifier using the first key group after receiving the seventh message;

Wherein the processing unit is specifically configured to:

29. The RAN apparatus according to any of claims 21 to 28, wherein before the transceiving unit forwards the data according to the transmission path information of the data, the processing unit is further configured to:

acquiring a second identifier of the UE, where the second identifier is used for determining, when the RAN device receives downlink data, that a target receiving device of the downlink data is the UE;

determining next skip sending equipment of the data according to the transmission path information of the data;

wherein the transceiver unit is specifically configured to: and sending the data and the second identifier to the next hop forwarding device.

30. The RAN apparatus according to any of claims 21 to 28, wherein the third identifier is used for determining, by the next hop forwarding apparatus, that the data belongs to the UE after receiving the data sent by the RAN apparatus.

31. A User Equipment (UE), comprising:

a processing unit, configured to determine a first identifier corresponding to data, where the first identifier is used for a first radio access network RAN device to determine, according to the first identifier, transmission path information of the data corresponding to the first identifier, where the first identifier is a transmission path information identifier of the data, the transmission path information of the data includes address information of a next forwarding device of the data and a third identifier allocated to the UE by the next forwarding device, and the third identifier uniquely identifies one bearer of the UE on a core network device side;

A transceiver unit, configured to send a first message to the first RAN device, where the first message includes the encrypted data and the encrypted first identifier.

32. The UE of claim 31, wherein the processing unit is further configured to:

encrypting the data and the first identifier by using a first key group;

wherein the transceiver unit is specifically configured to:

sending a first message to the first RAN device, where the first message includes the data encrypted by the UE using the first key group, the first identifier encrypted by the UE using the first key group, an identifier of the UE, and an identifier of a core network device, so that the first RAN device obtains context information of the UE according to the identifier of the UE, the identifier of the core network device, and the first identifier encrypted by the UE using the first key group, where the context information of the UE includes the first key group, the first identifier, and transmission path information corresponding to the first identifier.

33. The UE of claim 31, wherein prior to the transceiver unit sending the first message to the first RAN device, the transceiver unit is further configured to:

Sending an identity of the UE to the first RAN device;

receiving feedback information sent by the first RAN device, where the feedback information is used to instruct the first RAN device to determine, according to the identity of the UE, whether a determination result of context information of the UE is stored, where the context information of the UE includes the first identity and transmission path information corresponding to the first identity;

and when the feedback information indicates that the first RAN equipment does not store the context information of the UE, sending a second message to the core network equipment, wherein the second message is used for requesting the core network equipment to send the context information of the UE to the first RAN equipment.

34. The UE of claim 31, wherein prior to the transceiver unit sending the first message to the first RAN device, the transceiver unit is further configured to:

sending an identity of the UE to the first RAN device;

receiving feedback information sent by the first RAN equipment, wherein the feedback information is used for indicating the first RAN equipment to judge whether a judgment result of context information of the UE is stored or not according to the identity of the UE;

when the feedback information indicates that the first RAN device does not store the context information of the UE, sending a third message to the first RAN device, where the third message includes an identifier of the UE, the first identifier encrypted by a second key group, and an identifier of a core network device, so that the first RAN device obtains the context information of the UE according to the identifier of the UE, the first identifier encrypted by the second key group, and the identifier of the core network device, and the context information of the UE includes the first identifier and transmission path information corresponding to the first identifier.

35. The UE of claim 31, wherein the processing unit is further configured to:

encrypting the data and the first identifier by using a first key group;

wherein the transceiver unit is specifically configured to:

sending a first message to the first RAN device, where the first message includes the data encrypted by the UE using the first key group, the first identifier encrypted by the UE using the first key group, an identifier of the UE, and an identifier of a second RAN device, and the second RAN device is a RAN device determined by the UE and storing context information of the UE, so that the first RAN device obtains the context information of the UE according to the identifier of the UE, the first identifier encrypted by the UE using the first key group, and the identifier of the second RAN device, and the context information of the UE includes the first key group, the first identifier, and transmission path information corresponding to the first identifier.

36. The UE of claim 31, wherein the transceiver unit is further configured to:

sending an identity of the UE to the first RAN device;

the processing unit is further configured to perform encryption processing on a context of the UE using a public key of the first RAN device when the feedback information indicates that the first RAN device does not store the context information of the UE, where the context information of the UE includes a first key group;

the transceiver unit is further configured to send a first message to the first RAN device, where the first message includes the data encrypted by the processing unit using the first key group, the first identifier encrypted by the UE using the first key group, and the context information of the UE encrypted by the processing unit using the public key of the first RAN device, so that the first RAN device obtains the transmission path information of the data according to the context information of the UE.

37. The UE of claim 31, wherein context information of the UE is stored in both the first RAN device and the UE, and the context information of the UE includes a first key group, the first identifier, and transmission path information corresponding to the first identifier, and before the transceiver unit sends the first message to the first RAN device, the transceiver unit is further configured to:

Sending a fourth message to the first RAN device, the fourth message being used to request the first RAN device to restore the connection between the UE and the first RAN device;

receiving a fifth message sent by the first RAN device, where the fifth message is used to indicate that the connection between the UE and the first RAN device is restored;

wherein, the sending and receiving unit sends a first message to the first RAN device, specifically:

sending the first message to the first RAN device over the connection.

38. The UE of claim 37, wherein prior to the transceiver unit sending a fourth message to the first RAN device, the transceiver unit is further configured to:

sending a sixth message to the first RAN device, the sixth message being used to instruct the first RAN device to set the UE to a suspended state;

receiving a seventh message sent by the first RAN device, where the seventh message is used to indicate that the first RAN device has set the UE to a suspended state.

39. The UE of claim 38, wherein the processing unit is further configured to determine whether a moving range of the UE within a preset time period is within a preset range;

The transceiver unit is configured to send the sixth message to the first RAN device when the processing unit determines that a moving range of the UE in a preset time period is within a preset range.

40. The UE of any one of claims 31-39, wherein the third identifier is used for determining that the data sent by the first RAN device belongs to the UE after the data is received by the next hop forwarding device.