Wireless communication method and apparatus, communication node, and storage medium

Abstract

Provided in the present application are a wireless communication method and apparatus, a communication node, and a storage medium. The method is applied to a secondary base station node in dual-link communications, and comprises: receiving secondary node key modification indication information; and performing cell switching according to the secondary node key modification indication information. Traffic loss of communication between a secondary base station node and a UE caused by key switching is avoided, and senseless secondary base station node key switching for the UE in dual-link communications is implemented, thereby improving the stability of system communication.

Description

Wireless communication method, device, communication node and storage medium Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a wireless communication method, device, communication node, and storage medium. Background Art

[0002] In a communication network, encryption between a terminal device (User Equipment, UE) and a base station is based on a key between the two. For example, in a 5G network, the communication between the base station and the UE is encrypted based on the key of the next generation Node B (KgNB).

[0003] In a dual-link scenario, the UE will establish communication connections and communicate with two different base stations at the same time. The key in the UE is shared with the key in the master node (Master Node, MN). The key update in the MN will not affect the communication process between the UE and the MN. However, if the packet data convergence protocol count (PDCP COUNT) is about to flip during the communication between the UE and the secondary node (SN), the network needs to update the key. At this time, the SN will send a secondary node modification request (SN Modification Required) message to the MN, which contains a key change indication; then the MN will send a secondary node modification feedback (SN Modification Request) message containing the new key (Key Serial Number, KSN) to the SN to complete the SN's key update.

[0004] Since the SN needs to use a new key for communication after the key update, if services are being transmitted between the UE and the SN, the key update will cause a brief interruption of service data, which will in turn cause traffic to drop and reduce communication stability.

[0005] Summary of the Invention

[0006] The present application provides a wireless communication method, apparatus, communication node, and storage medium to solve the problem of decreased communication stability caused by service data interruption between UE and SN when the SN key is updated in a dual-link scenario.

[0007] To achieve the above objectives, an embodiment of the present application provides a wireless communication method, applied to a secondary base station node in dual-link communication, comprising:

[0008] Receiving secondary node key modification instruction information;

[0009] Perform cell switching according to the secondary node key modification indication information.

[0010] To achieve the above objectives, an embodiment of the present application provides another wireless communication method, applied to a master base station node in dual-link communication, including:

[0011] Sending secondary node key modification instruction information to the secondary base station node, so that the secondary base station node performs cell switching according to the secondary node key modification instruction information;

[0012] receiving a secondary node key modification response message, and constructing wireless resource connection configuration information according to the secondary node key modification response message;

[0013] The wireless resource connection configuration information is sent to the terminal device corresponding to the secondary base station node, so that the terminal device switches to the cell after the secondary base station node is switched according to the wireless resource connection configuration information.

[0014] To achieve the above objectives, an embodiment of the present application provides another wireless communication method, which is applied to a terminal device in dual-link communication, including:

[0015] Receiving wireless resource connection configuration information;

[0016] Perform cell switching according to wireless resource connection configuration information;

[0017] The wireless resource connection configuration information is information constructed by the primary base station node based on the secondary node key modification response information and the secondary base station node count value;

[0018] The secondary node key modification response information is response information after the secondary base station node performs cell switching according to the secondary node key modification indication information, and the secondary node key modification response information includes target cell configuration information.

[0019] To achieve the above objectives, an embodiment of the present application provides a wireless communication device, applied to a secondary base station node in dual-link communication, including:

[0020] An indication information receiving module, configured to receive secondary node key modification indication information;

[0021] The first cell switching module is configured to perform cell switching according to the secondary node key modification indication information.

[0022] To achieve the above objectives, an embodiment of the present application provides a wireless communication device, applied to a master base station node in dual-link communication, including:

[0023] An indication information sending module, configured to send secondary node key modification indication information to a secondary base station node, so that the secondary base station node performs cell switching according to the secondary node key modification indication information;

[0024] A configuration information building module, configured to receive the secondary node key modification response information and build wireless resource connection configuration information according to the secondary node key modification response information;

[0025] The configuration information sending module is used to send the wireless resource connection configuration information to the terminal device corresponding to the secondary base station node, so that the terminal device switches to the cell after the secondary base station node is switched according to the wireless resource connection configuration information.

[0026] To achieve the above objectives, an embodiment of the present application provides a wireless communication device, which is applied to a terminal device in dual-link communication, including:

[0027] A configuration information receiving module, configured to receive wireless resource connection configuration information;

[0028] A second cell switching module, configured to perform cell switching according to the radio resource connection configuration information;

[0029] The wireless resource connection configuration information is information constructed by the primary base station node based on the secondary node key modification response information and the secondary base station node count value;

[0030] The secondary node key modification response information is response information after the secondary base station node performs cell switching according to the secondary node key modification indication information, and the secondary node key modification response information includes target cell configuration information.

[0031] To achieve the above-mentioned objectives, an embodiment of the present application provides a communication node comprising: a memory, a processor, a program stored in the memory and executable on the processor, and a data bus for realizing connection communication between the processor and the memory. When the program is executed by the processor, a wireless communication method as described in any one of the embodiments of the present application is implemented.

[0032] To achieve the above-mentioned objectives, an embodiment of the present application provides a storage medium for computer-readable storage, wherein the storage medium stores at least one program, and the at least one program can be executed by at least one processor to implement the wireless communication method of any one of the embodiments of the present application.

[0033] The wireless communication method, device, communication node and storage medium provided in the embodiment of the present application receive secondary node key modification indication information; and perform cell switching according to the secondary node key modification indication information. By adopting the above technical solution, when the secondary base station node in the dual-link communication scenario needs to perform key switching, the secondary base station node will perform key modification and cell switching on the secondary base station node according to the received secondary node key modification indication information. Since the cell switching has a corresponding information caching mechanism, the secondary base station node will not cause the interruption of the business data being transmitted during the key switching, avoiding the traffic drop between the secondary base station node and the UE due to the key switching, realizing the UE-unaware secondary base station node key switching under dual-link communication, and improving the system communication stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG1 is a timing diagram illustrating an example of an SN requesting a key in a dual-link scenario in the related art;

[0035] FIG2 is a schematic diagram of a flow chart of a wireless communication method provided in an embodiment of the present application;

[0036] FIG3 is a schematic diagram of a flow chart of another wireless communication method provided in an embodiment of the present application;

[0037] FIG4 is a schematic diagram of a flow chart of a wireless communication method provided in an embodiment of the present application;

[0038] FIG5 is an example diagram of a wireless communication process in which a secondary base station node initiates a key update according to an embodiment of the present application;

[0039] FIG6 is an example diagram of a wireless communication process in which a master base station node initiates a key update according to an embodiment of the present application;

[0040] FIG7 is a schematic structural diagram of a wireless communication device provided in an embodiment of the present application;

[0041] FIG8 is a schematic structural diagram of a wireless communication device provided in an embodiment of the present application;

[0042] FIG9 is a schematic structural diagram of a wireless communication device provided in an embodiment of the present application;

[0043] FIG10 is a schematic diagram of the structure of a communication node provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions and advantages of this application more clear, the embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of this application can be combined with each other in any way.

[0045] The steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions. Also, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be performed in an order different from that shown here.

[0046] In a communication network, in order to establish a dual-link communication scenario, the UE, MN, and SN will first complete the SN addition process to establish a link between the UE and the SN. During the communication process between the UE and the SN, the PDCP COUNT will gradually accumulate and will flip when it reaches the maximum value. At this time, the SN needs to replace the new key to encrypt the transmitted data. Figure 1 is an example of the timing of the SN requesting a key in a dual-link scenario in the related art. As shown in Figure 1, the SN first sends a secondary base station node modification request (SN Modification Required) message to the MN. The message contains key change indication information. After receiving the secondary base station node modification request message, the MN allocates a new key KSN to the SN according to the key change indication information therein. Then, the MN sends a secondary base station node modification feedback (SN Modification Request) message containing KSN to the SN, so that the SN can update the key to KSN based on the secondary base station node modification feedback message and use KSN to rebuild the communication with the UE. However, when the SN updates the key for the cell communicating with the UE, it must first interrupt the communication between the UE and the SN. If there is still business between the UE and the SN during the key update, it will cause a brief interruption of the business, which will in turn cause traffic to drop and reduce communication stability.

[0047] To solve the above problems, the present application provides a wireless communication method that can realize the senseless update of the SN key for the UE and improve the communication stability.

[0048] It can be understood that the wireless communication method provided in each embodiment of the present application can be applicable to the fourth generation mobile communication system (the 4th Generation mobile communication technology, 4G), such as the long term evolution system (Long Term Evolution, LTE); or the fifth generation mobile communication system (the 5th Generation mobile communication technology, 5G), such as the access network using new radio access technology (new radio access technology, NewRAT) and the cloud radio access network (Cloud Radio Access Network, CRAN), etc., or the future sixth generation mobile communication system, and the embodiments of the present application are not limited to this.

[0049] In an exemplary embodiment, Figure 2 is a flow chart of a wireless communication method provided in an embodiment of the present application. The method can be applied to the situation where the key of SN is updated in a dual-link scenario. The method can be executed by a wireless communication device, which can be executed by software and / or hardware and integrated on a communication node. Exemplarily, the communication node can be a base station serving as SN in a dual-link communication scenario.

[0050] As shown in FIG2 , the wireless communication method provided in the embodiment of the present application specifically includes the following steps:

[0051] S110: Receive secondary node key modification instruction information.

[0052] In this embodiment, the secondary node key modification instruction information can be specifically understood as information sent by the MN to the SN to instruct the SN to modify the key.

[0053] Specifically, when the SN itself determines that a key update is required, or the MN determines that a key update is required for the SN, the MN will generate a secondary node key modification indication message containing the new key required by the SN, and a cell switching indication message for instructing the SN to perform a cell switch while performing a key switch, so that the SN can receive the secondary node key modification indication message sent by the MN to the SN.

[0054] S120: Perform cell switching according to the secondary node key modification instruction information.

[0055] Specifically, when the SN receives the secondary node key modification indication information, it parses the secondary node key modification indication information, and selects a cell to be switched that is different from the current cell and meets the communication requirements from each cell corresponding to the SN based on the cell switching indication information in the secondary node key modification indication information, so as to perform cell switching from the current cell to the cell to be switched, and uses the new secondary node key contained in the secondary node key modification indication information as the secondary node key required to use for data communication in the cell to be switched.

[0056] The wireless communication method provided in the embodiment of the present application receives secondary node key modification indication information; and performs cell switching according to the secondary node key modification indication information. By adopting the above technical solution, when the secondary base station node in the dual-link communication scenario needs to perform key switching, the secondary base station node will perform key modification and cell switching on the secondary base station node according to the received secondary node key modification indication information. Since the cell switching has a corresponding information caching mechanism, the secondary base station node will not cause the interruption of the business data being transmitted during the key switching, avoiding the traffic drop between the secondary base station node and the UE due to the key switching, realizing the UE-unaware secondary base station node key switching under dual-link communication, and improving the system communication stability.

[0057] In one embodiment, when the SN determines that a key update is required, before receiving the secondary node key modification request information, the method further includes: sending the secondary node key modification request information to the primary base station node.

[0058] In this embodiment, the secondary node key modification request information can be specifically understood as key update indication information sent by the SN to the MN, indicating that the SN needs to obtain a new key.

[0059] Specifically, when the SN determines that a key update is required, it generates a key modification request message including key update indication information, and sends the key modification request message to the corresponding MN to request the MN to obtain a new key.

[0060] In one example, sending the secondary node key modification request information to the primary base station node includes: sending the secondary node key modification request information to the primary base station node when the secondary node key update condition is met.

[0061] In this embodiment, the secondary node key update condition can be specifically understood as a condition pre-set according to actual conditions, which is used to trigger the SN to update the key of the cell that is communicating in a dual-link scenario. Exemplarily, the secondary node key update condition includes that the PDCP COUNT is greater than a preset rollover critical value, and may also include a condition that triggers the SN to update the key, which is not limited in this embodiment of the present application. Exemplarily, the preset rollover critical value can be the previous value of the PDCP COUNT rollover, or it can be a value set according to actual conditions that is less than the PDCP COUNT rollover value, which is not limited in this embodiment of the present application.

[0062] Specifically, when the SN meets the secondary node key update conditions, it may consider that its own key needs to be updated. At this time, it will generate a key modification request message containing key update indication information and send the key modification request message to the corresponding MN to request the MN to obtain a new key.

[0063] In an example, performing cell switching according to the secondary node key modification indication information includes: performing cell switching according to the cell switching indication in the secondary node key modification indication information.

[0064] In one embodiment, after performing cell handover according to the secondary node key modification indication information, the method further includes:

[0065] Determine the cell after handover as the target cell;

[0066] Generate secondary node key modification response information according to the target cell, and send the key modification response information to the main base station node, so that the main base station node configures wireless resource connection for the terminal device corresponding to the secondary base station node based on the secondary node key modification response information.

[0067] In this embodiment, the secondary node key modification response information can be specifically understood as information sent by the SN to the MN to respond to the secondary node key modification indication information and to inform the MN of the cell handover result performed by the SN.

[0068] Specifically, after the SN performs cell switching based on the secondary node key modification indication information, the cell it switches to can be considered as a cell that will use the new key in the secondary node key modification indication information for communication, or it can be considered as a cell that the UE needs to establish a link with in the subsequent communication process. At this time, the cell after the switch is determined as the target cell. The information required for accessing the target cell is written into the secondary node key modification response information fed back by the SN to the MN. After the SN sends the secondary node key modification response information to the corresponding MN, the MN can configure the wireless resource connection for the UE corresponding to the SN based on the information for accessing the target cell in the secondary node key modification response information, so that the UE can access the target cell for data transmission in the subsequent communication process based on this information.

[0069] In one embodiment, the node key modification response information includes target cell configuration information for accessing the target cell.

[0070] In this embodiment, the target cell configuration information can be specifically understood as information required for accessing the target cell. Exemplarily, the target cell configuration information may include information such as the target cell identification number, which is not limited in this embodiment of the present application.

[0071] In one embodiment, after sending the key modification response information to the main base station node, it also includes: when receiving the wireless resource connection configuration response information of the terminal device, enabling the new secondary node key in the secondary node key modification indication information to transmit data with the terminal device based on the new secondary node key.

[0072] In this embodiment, the radio resource connection configuration response information can be specifically understood as information sent by the UE to the SN to inform the SN that the UE has switched to the target cell and can use the new secondary node key to re-establish communication with the SN target cell.

[0073] Specifically, after sending the key modification response information to the MN, the SN will wait for the UE to complete the cell switching and wireless resource connection configuration. When receiving the wireless resource connection configuration response information from the UE, it can be considered that the UE has switched to the target cell and has clearly defined the new secondary node key that can communicate with the target cell. At this time, the new secondary node key carried in the secondary node key modification indication information can be enabled in the target cell of the SN, so that the UE and the SN can transmit data based on the new secondary node key.

[0074] The wireless communication method provided in the embodiment of the present application, when the SN itself needs to perform a key switch and receives a secondary node key modification indication message after requesting a key from the MN, or when the MN needs to perform a key switch on the SN and sends a secondary node key modification indication message to the SN, the secondary base station node will be modified in accordance with the received secondary node key modification indication message and the cell switch will be fed back to the MN after the cell switch is completed, so that the MN can configure the UE according to the target cell configuration information and enable the UE to complete the cell switch corresponding to the SN, thereby enabling the UE and the SN to use the new key for data transmission in the switched cell. Since the cell switch has a corresponding information caching mechanism, the secondary base station node will not cause the interruption of the business data being transmitted during the key switch, thereby avoiding the traffic drop in the communication between the secondary base station node and the UE due to the key switch, and realizing the UE-unaware secondary base station node key switch under dual-link communication, thereby improving the system communication stability.

[0075] In an exemplary embodiment, Figure 3 is a flow chart of another wireless communication method provided in an embodiment of the present application. The method can be applied to the situation where the SN key is updated in a dual-link scenario. The method can be executed by a wireless communication device, which can be executed by software and / or hardware and integrated on a communication node. Exemplarily, the communication node can be a base station serving as an MN in a dual-link communication scenario.

[0076] As shown in FIG3 , the wireless communication method provided in the embodiment of the present application specifically includes the following steps:

[0077] S210: Send secondary node key modification indication information to the secondary base station node, so that the secondary base station node performs cell switching according to the secondary node key modification indication information.

[0078] Specifically, when it is determined that the SN needs to perform a key switch, a secondary node key modification indication message carrying the new secondary node key required by the SN and the cell switching indication is sent to the SN, so that the SN can perform a cell switch in response to the cell switching indication in the secondary node key modification indication message, and feedback the switching result of the cell switch to the MN.

[0079] S220: Receive secondary node key modification response information, and construct wireless resource connection configuration information according to the secondary node key modification response information.

[0080] In this embodiment, the wireless resource connection configuration information can be specifically understood as the configuration information sent by the MN to the UE to inform the UE of the new cell to which the SN of its corresponding communication is switched, and for the UE to access the new cell and perform encrypted communication with the new cell.

[0081] Specifically, when MN receives the secondary node key modification response information, it can be considered that SN has completed the switching of the new cell and the configuration of the new secondary node key in the new cell. MN will parse the secondary node key modification response information to determine the new cell to which SN switches and the information required for accessing the new cell. Then, based on the information required for accessing the new cell in the secondary node key modification response information and the information related to the SN key modification, the wireless resource connection configuration information of the UE corresponding to the SN can be constructed.

[0082] S230: Send the wireless resource connection configuration information to the terminal device corresponding to the secondary base station node, so that the terminal device switches to the cell after the secondary base station node is switched according to the wireless resource connection configuration information.

[0083] Specifically, the MN sends the constructed wireless resource connection configuration information to the UE corresponding to the SN, so that after parsing the wireless resource connection configuration information, the UE can perform cell switching based on the information contained therein for accessing the new cell after the SN is switched. Since there is a corresponding information caching mechanism during the cell switching process, the UE and the SN will not cause the interruption of the business data being transmitted during the cell switching process. Since the wireless resource connection configuration information contains information related to the SN key modification, the UE can determine the new key of the SN after parsing the wireless resource connection configuration information, and then after switching to the cell after the SN is switched, the UE can use the same new key as the new cell in the SN to transmit data with the new cell.

[0084] In one embodiment, sending secondary node key modification indication information to the secondary base station node includes: sending secondary node key modification indication information to the secondary base station node when receiving secondary node key modification request information; or sending secondary node key modification indication information to the secondary base station node when the primary node key update condition is met.

[0085] In this embodiment, the master node key update condition can be specifically understood as a condition pre-set according to actual conditions to trigger the MN to perform a key update on the SN that is currently communicating in a dual-link scenario. Exemplarily, the master node key update condition includes an access layer key update or an expiration of the key operation period, and may also include other conditions that can trigger the MN to perform a key update, which is not limited in this embodiment of the present application.

[0086] Specifically, the triggering of MN sending secondary node key modification indication information to SN can be divided into two situations. One situation is when SN itself determines that key modification is required, SN will send secondary node key modification request information to MN, which carries a key update indication. When MN receives the secondary node key modification request information, it will respond to the key update indication to determine the new key required by SN, and carry the new key and cell switching indication in the generated secondary node key modification indication information and send it to SN. The other situation is when MN itself determines that SN needs to be modified, it generates a new key that SN needs to replace, and carries the new key and cell switching indication in the generated secondary node key modification indication information and sends it to SN. It can be considered that when the primary node key update conditions are met, MN has the need to modify the SN's key.

[0087] In one embodiment, constructing wireless resource connection configuration information according to the secondary node key modification response information includes:

[0088] The radio resource connection configuration information is constructed according to the target cell configuration information and the secondary base station node count value in the secondary node key modification response information.

[0089] Specifically, the secondary node key modification response information includes target cell configuration information for accessing the cell information after SN switching. Since the SN updated key is constructed by MN based on its own key and the secondary base station node count value (SN COUNTER) corresponding to the SN key modification this time, and since the UE and MN share the key, the MN only needs to write the SN COUNTER and the target cell configuration information into the constructed wireless resource connection configuration information, so that the UE can construct the SN updated key based on the SN COUNTER and the key shared with the MN after receiving the wireless resource connection configuration information, and then after completing the cell switching according to the target cell configuration information, use the constructed new key to transmit data with the new cell of the SN.

[0090] The wireless communication method provided by the embodiment of the present application enables the MN in the dual-link communication scenario to send a secondary node key modification indication message to the SN when determining that its corresponding SN needs to perform a key switch, so as to modify the key and switch the cell of the SN, and then, after receiving the secondary node key modification response message after the SN switches the cell and updates the key in response to the secondary node key modification indication message, generate wireless resource connection configuration information for the UE corresponding to the SN to perform cell switching and key update and send it to the corresponding UE, so that the UE can complete the cell switching corresponding to the SN and modify the key to a new key for the cell corresponding to the SN, so as to use the new key for data transmission. Since the cell switching has a corresponding information caching mechanism, the SN will not cause the interruption of the business data being transmitted during the key switching, thereby avoiding the traffic drop of the communication between the secondary base station node and the UE due to the key switching, and during the key update process of the SN, the UE will only perform a cell switching and key update once, thereby realizing the UE-unaware secondary base station node key switching under dual-link communication, thereby improving the system communication stability.

[0091] In an exemplary embodiment, Figure 4 is a flow chart of a wireless communication method provided in an embodiment of the present application. The method can be applied to the situation where the SN key is updated in a dual-link scenario. The method can be performed by a wireless communication device, which can be executed by software and / or hardware and integrated on a communication node. Exemplarily, the communication node can be a wireless communication device serving as a UE in a dual-link communication scenario.

[0092] As shown in FIG4 , the wireless communication method provided in the embodiment of the present application specifically includes the following steps:

[0093] S310: Receive wireless resource connection configuration information.

[0094] The wireless resource connection configuration information is information constructed by the primary base station node according to the secondary node key modification response information and the secondary base station node count value.

[0095] The secondary node key modification response information is response information after the secondary base station node performs cell switching according to the secondary node key modification indication information, and the secondary node key modification response information includes target cell configuration information.

[0096] Specifically, when the SN needs to modify the key, the MN will send a secondary node key modification indication message to the SN, and after the SN performs cell switching and key modification based on the secondary node key modification indication message, it will feedback to the MN a secondary node key modification response message containing the target cell configuration information required to access the cell after its switching, so that the MN constructs the wireless resource connection configuration information based on the target cell configuration information in the secondary node key modification response message and its own secondary base station node count value used to generate the new SN key, and sends the wireless resource connection configuration information to the corresponding UE, so that the UE can reconfigure its own communication status after receiving the wireless resource connection configuration information.

[0097] S320: Perform cell switching according to the wireless resource connection configuration information.

[0098] Specifically, the UE parses the received wireless resource connection configuration information to determine that it contains the target cell configuration information, and thus can clarify the information required for the UE to access the SN cell during continued communication, thereby enabling the UE to switch to the corresponding SN cell according to the target cell configuration information in the wireless resource connection configuration information. This cell is the cell after the SN performs cell switching based on the secondary node key modification indication information.

[0099] In one embodiment, performing cell switching according to the radio resource connection configuration information includes: determining a target cell according to target cell configuration information in the radio resource connection configuration information; and switching to the target cell.

[0100] Specifically, after parsing the wireless resource connection configuration information, the UE can obtain the target cell configuration information. Since the target cell configuration information contains information for accessing the corresponding cell, such as an identifier (Identity, ID), etc., the cell corresponding to the target cell configuration information can be determined as the target cell, so that the UE can switch to the target cell based on the above information for accessing the cell.

[0101] In one embodiment, after performing cell switching according to the wireless resource connection configuration information, it also includes: sending wireless resource connection configuration response information to the secondary base station node; enabling the key corresponding to the secondary base station node determined according to the secondary base station node count value in the wireless resource connection configuration information, so as to transmit data with the secondary base station node based on the key.

[0102] In this embodiment, the wireless resource connection configuration response information can be specifically understood as the response information sent by the UE to the corresponding SN to indicate that the UE has switched to the target cell in the SN and can use the SN updated key to transmit data with the SN.

[0103] Specifically, in order to establish a communication connection between the UE and the new cell of the SN, the UE needs to generate a wireless resource connection configuration response information corresponding to the wireless resource connection configuration information after completing the cell switching according to the wireless resource connection configuration information, and send the wireless resource connection configuration response information to the SN. Since the new cell of the SN uses a new key, before the UE and the SN perform data transmission based on the new cell, the UE needs to determine the new key corresponding to the new cell of the SN based on the SN COUNTER in the wireless resource connection configuration information, and start the new key in the UE and the SN at the same time, so that the UE can perform data transmission with the SN based on the new key.

[0104] The wireless communication method provided in the embodiment of the present application enables the UE in the dual-link communication scenario to switch to the target cell after the cell switching of the SN requesting the key update upon receiving the wireless resource connection configuration information sent to it by the MN, and then transmit data with the SN after the key modification and cell switching in the target cell. Since the cell switching has a corresponding information caching mechanism, and the UE performs cell switching based on the wireless resource connection configuration information given by the SN after the key update and cell switching, when the UE switches to the new cell of the SN, it can not only realize the key update in the new cell, but also will not cause the interruption of the business data being transmitted due to the key and cell update, thus avoiding the traffic drop between the secondary base station node and the UE due to the key switch, and during the key update process of the SN, the UE will only perform one cell switch and key update, thus realizing the UE-unaware secondary base station node key switch under dual-link communication, thereby improving the system communication stability.

[0105] The following is an exemplary description of the present application, and the key update and wireless communication process of the SN are explained through the following embodiments:

[0106] Example 1

[0107] FIG5 is an example diagram of a wireless communication process in which a secondary base station node initiates a key update according to an embodiment of the present application. As shown in FIG5 , a dual-link communication involves three parties: the MN, the SN, and the UE. The wireless communication process in which the SN initiates a key update is specifically as follows:

[0108] 1. Before being put into use, the SN adding process will be completed between the UE, MN and SN to establish the link between the UE and SN.

[0109] 2. Data transmission between UE and SN.

[0110] 3. When the secondary node key update condition is met, the SN decides to update the key. During data transmission between the UE and the SN, the value of the PDCP COUNT will gradually increase. Taking the 5G network as an example, the value of the PDCP COUNT is 32 bits. Therefore, as the PDCP COUNT value increases, the PDCP COUNT value will roll over. The imminent rollover of the PDCP COUNT can be determined as a secondary node key update condition.

[0111] 4. The SN sends a secondary node key modification request message to the MN. The secondary node key modification request message carries a key update indication, which indicates that the SN needs a new key.

[0112] 5. The MN sends a Secondary Node Key Change Indication message to the SN. The Secondary Node Key Change Indication message carries a new key and a cell handover indication. The cell handover indication instructs the SN to perform a cell handover and use the new key to communicate with the UE after the cell handover.

[0113] 6. The SN replies to the MN with a secondary node key modification response message, which includes a cell handover indication response and information required for accessing the new cell of the SN, such as the new cell ID.

[0114] 7. The MN sends a radio resource connection configuration message to the UE. The radio resource connection configuration message includes the SN COUNTER and the information required for accessing the new SN cell received in step 6.

[0115] 8. The UE switches to the new SN cell.

[0116] 9. The UE sends a radio resource connection configuration response message to the SN.

[0117] 10. The UE and SN activate the new key. After the new key is activated, the PDCP COUNT will be reset.

[0118] 11. UE and SN perform data transmission based on the new key.

[0119] Example 2

[0120] FIG6 is an example diagram of a wireless communication process in which a master base station node initiates a key update according to an embodiment of the present application. As shown in FIG6 , a dual-link communication involves three parties: a UE, a MN, and a SN. The wireless communication process in which the MN initiates a key update is specifically as follows:

[0121] 1. Before being put into use, the SN adding process will be completed between the UE, MN and SN to establish the link between the UE and SN.

[0122] 2. Data transmission between UE and SN.

[0123] 3. During data transmission between the UE and the SN, the MN may decide to update the SN's key for various reasons. These reasons can be summarized as master node key update conditions. For example, the MN needs to update the SN's key when it updates its own access layer key, or the MN needs to proactively update the SN's key when it determines that the SN's key has exceeded the key operation period. This embodiment of the present application does not limit this.

[0124] 4. The MN sends a secondary node key modification indication message to the SN. The secondary node key modification indication message carries a new key and a cell handover indication.

[0125] 5. The SN replies to the MN with a secondary node key modification response message, which includes a cell handover indication response and the information required for accessing the new cell of the SN.

[0126] 6. The MN sends a radio resource connection configuration message to the UE. The radio resource connection configuration message contains the SN COUNTER and the information required to access the new SN cell received in step 5.

[0127] 7. The UE switches to the new SN cell.

[0128] 8. The UE sends a radio resource connection configuration response message to the SN.

[0129] 9. The UE and SN activate the new key. After the new key is activated, the PDCP COUNT will be reset.

[0130] 10. UE and SN perform data transmission based on the new key.

[0131] In an exemplary embodiment, FIG7 is a schematic structural diagram of a wireless communication device provided in an embodiment of the present application. The device is applied to a secondary base station node in dual-link communication. As shown in FIG7 , the device includes:

[0132] The indication information receiving module 410 is configured to receive secondary node key modification indication information.

[0133] The first cell switching module 420 is configured to perform cell switching according to the secondary node key modification indication information.

[0134] The wireless communication device provided in the embodiment of the present application enables the secondary base station node in the dual-link communication scenario to modify the key and switch the cell of the secondary base station node according to the received secondary node key modification indication information when a key switch is required. Since the cell switch has a corresponding information caching mechanism, the secondary base station node will not cause the interruption of the business data being transmitted during the key switch, thereby avoiding the traffic drop between the secondary base station node and the UE due to the key switch, realizing the UE-imperceptible secondary base station node key switch under dual-link communication, and improving the system communication stability.

[0135] In one embodiment, before receiving the secondary node key modification request information, the method further includes: sending the secondary node key modification request information to the primary base station node.

[0136] In one embodiment, sending the secondary node key modification request information to the primary base station node includes: sending the secondary node key modification request information to the primary base station node when the secondary node key update condition is met.

[0137] In one embodiment, performing cell switching according to the secondary node key modification indication information includes: performing cell switching according to the cell switching indication in the secondary node key modification indication information.

[0138] In one embodiment, after performing cell handover according to the secondary node key modification indication information, the method further includes:

[0139] The switched cell is determined as the target cell; a secondary node key modification response message is generated according to the target cell, and the key modification response message is sent to the main base station node, so that the main base station node configures the wireless resource connection of the terminal device corresponding to the secondary base station node based on the secondary node key modification response message.

[0140] In one embodiment, the secondary node key modification response message includes target cell configuration information for accessing the target cell.

[0141] In one embodiment, after sending the key modification response information to the main base station node, it also includes: when receiving the wireless resource connection configuration response information of the terminal device, enabling the new secondary node key in the secondary node key modification indication information to transmit data with the terminal device based on the new secondary node key.

[0142] In one embodiment, the secondary node key update condition includes a Packet Data Convergence (PDCP) count value being greater than a predetermined rollover threshold.

[0143] The wireless communication device proposed in this embodiment and the wireless communication method proposed in the above embodiment belong to the same inventive concept. For technical details not fully described in this embodiment, please refer to any of the above embodiments, and this embodiment has the same beneficial effects as executing the wireless communication method.

[0144] In an exemplary embodiment, FIG8 is a schematic structural diagram of a wireless communication device provided in an embodiment of the present application, which is applied to a master base station node in dual-link communication. As shown in FIG8, the device includes:

[0145] The indication information sending module 510 is configured to send secondary node key modification indication information to the secondary base station node, so that the secondary base station node performs cell handover according to the secondary node key modification indication information.

[0146] The configuration information constructing module 520 is configured to receive the secondary node key modification response information and construct the wireless resource connection configuration information according to the secondary node key modification response information.

[0147] The configuration information sending module 530 is configured to send the radio resource connection configuration information to the terminal device corresponding to the secondary base station node, so that the terminal device switches to the cell after the secondary base station node is switched according to the radio resource connection configuration information.

[0148] The wireless communication device provided in the embodiment of the present application enables the MN in the dual-link communication scenario to send a secondary node key modification indication message to the SN when determining that its corresponding SN needs to perform a key switch, so as to modify the key and switch the cell of the SN, and then after receiving the secondary node key modification response message after the SN switches the cell and updates the key in response to the secondary node key modification indication message, it generates wireless resource connection configuration information for the UE corresponding to the SN to perform cell switching and key update and sends it to the corresponding UE, so that the UE can complete the cell switching corresponding to the SN and modify the key to a new key for the cell corresponding to the SN, so as to use the new key for data transmission. Since the cell switching has a corresponding information caching mechanism, the SN will not cause the interruption of the business data being transmitted when the key is switched, avoiding the traffic drop of the communication between the secondary base station node and the UE due to the key switch, and during the key update process of the SN, the UE will only perform a cell switch and key update once, realizing the UE-unaware secondary base station node key switching under dual-link communication, thereby improving the system communication stability.

[0149] In one embodiment, sending secondary node key modification indication information to the secondary base station node includes:

[0150] Upon receiving the secondary node key modification request information, sending the secondary node key modification indication information to the secondary base station node; or

[0151] When the master node key update condition is met, secondary node key modification indication information is sent to the secondary base station node.

[0152] In one embodiment, the radio resource connection configuration information constructed according to the secondary node key modification response information includes:

[0153] The radio resource connection configuration information is constructed according to the target cell configuration information and the secondary base station node count value in the secondary node key modification response information.

[0154] In one embodiment, the master node key update condition includes access layer key update or exceeding the key operation period.

[0155] The wireless communication device proposed in this embodiment and the wireless communication method proposed in the above embodiment belong to the same inventive concept. For technical details not fully described in this embodiment, please refer to any of the above embodiments, and this embodiment has the same beneficial effects as executing the wireless communication method.

[0156] In an exemplary embodiment, FIG9 is a schematic structural diagram of a wireless communication device provided in an embodiment of the present application. The device is applied to a terminal device in dual-link communication. As shown in FIG9 , the device includes:

[0157] The configuration information receiving module 610 is configured to receive wireless resource connection configuration information.

[0158] The second cell switching module 620 is configured to perform cell switching according to the radio resource connection configuration information.

[0159] Among them, the wireless resource connection configuration information is information constructed by the primary base station node based on the secondary node key modification response information and the secondary base station node count value; among them, the secondary node key modification response information is the response information after the secondary base station node performs cell switching according to the secondary node key modification indication information, and the secondary node key modification response information includes the target cell configuration information.

[0160] The wireless communication device provided in the embodiment of the present application enables the UE in the dual-link communication scenario to switch to the target cell after the cell switching of the SN requesting the key update when receiving the wireless resource connection configuration information sent to it by the MN, and then transmit data with the SN after the key modification and cell switching in the target cell. Since the cell switching has a corresponding information caching mechanism, and the UE performs cell switching based on the wireless resource connection configuration information given by the SN after the key update and cell switching, when the UE switches to the new cell of the SN, it can not only realize the key update in the new cell, but also will not cause the interruption of the business data being transmitted due to the key and cell update, thus avoiding the traffic drop between the secondary base station node and the UE due to the key switch, and during the key update process of the SN, the UE will only perform one cell switch and key update, realizing the UE-unaware secondary base station node key switch under dual-link communication, thereby improving the system communication stability.

[0161] In one embodiment, performing cell switching according to the radio resource connection configuration information includes: determining a target cell according to target cell configuration information in the radio resource connection configuration information; and switching to the target cell.

[0162] In one embodiment, after performing cell switching according to the radio resource connection configuration information, the method further includes:

[0163] Sending a wireless resource connection configuration response message to the secondary base station node; activating a key corresponding to the secondary base station node determined according to the secondary base station node count value in the wireless resource connection configuration message, so as to perform data transmission with the secondary base station node based on the key.

[0164] The wireless communication device proposed in this embodiment and the wireless communication method proposed in the above embodiment belong to the same inventive concept. For technical details not fully described in this embodiment, please refer to any of the above embodiments, and this embodiment has the same beneficial effects as executing the wireless communication method.

[0165] An embodiment of the present application also provides a communication node. Figure 10 is a structural diagram of a communication node provided by an embodiment of the present application. As shown in Figure 10, the communication node provided by an embodiment of the present application includes a memory 720, a processor 710, and a computer program stored in the memory and executable on the processor. When the processor 710 executes the program, the above-mentioned wireless communication method is implemented.

[0166] The communication node may also include a memory 720; the processor 710 in the communication node may be one or more, and Figure 10 takes one processor 710 as an example; the memory 720 is used to store one or more programs; the one or more programs are executed by the one or more processors 710, so that the one or more processors 710 implement the wireless communication method as described in the embodiment of the present application.

[0167] The communication node further includes: a communication device 730 , an input device 740 and an output device 750 .

[0168] The processor 710 , memory 720 , communication device 730 , input device 740 and output device 750 in the communication node may be connected via a bus or other means. FIG10 takes the bus connection as an example.

[0169] The input device 740 may be used to receive input digital or character information and generate key signal input related to user settings and function control of the communication node. The output device 750 may include a display device such as a display screen.

[0170] The communication device 730 may include a receiver and a transmitter. The communication device 730 is configured to perform information transmission and reception communication according to the control of the processor 710.

[0171] The memory 720, as a computer-readable storage medium, can be configured to store software programs, computer executable programs, and modules, such as program instructions / modules corresponding to the wireless communication method described in the embodiments of the present application (for example, the indication information receiving module 410 and the first cell switching module 420 in the wireless communication device; or the indication information sending module 510, the configuration information building module 520, and the configuration information sending module 530; or the configuration information receiving module 610 and the second cell switching module 620). The memory 720 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; and the data storage area may store data created based on the use of the communication node. In addition, the memory 720 may include a high-speed random access memory and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 720 may further include a memory remotely located relative to the processor 710, and these remote memories may be connected to the communication node via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0172] An embodiment of the present application further provides a storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by a processor, the wireless communication method described in any one of the embodiments of the present application is implemented.

[0173] Optionally, the wireless communication method is applied to a secondary base station node in dual-link communication, including: receiving secondary node key modification indication information; and performing cell switching according to the secondary node key modification indication information.

[0174] Optionally, the wireless communication method is applied to a main base station node in dual-link communication, including: sending secondary node key modification indication information to a secondary base station node, so that the secondary base station node performs cell switching based on the secondary node key modification indication information; receiving secondary node key modification response information, and constructing wireless resource connection configuration information based on the secondary node key modification response information; sending the wireless resource connection configuration information to a terminal device corresponding to the secondary base station node, so that the terminal device switches to the cell after the secondary base station node is switched based on the wireless resource connection configuration information.

[0175] Optionally, the wireless communication method is applied to a terminal device in dual-link communication, including: receiving wireless resource connection configuration information; performing cell switching according to the wireless resource connection configuration information; wherein the wireless resource connection configuration information is information constructed by the primary base station node based on the secondary node key modification response information and the secondary base station node count value; wherein the secondary node key modification response information is the response information of the secondary base station node after the cell switching is performed according to the secondary node key modification indication information, and the secondary node key modification response information includes the target cell configuration information.

[0176] The computer storage medium of the embodiment of the present application can adopt any combination of one or more computer-readable media.Computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium.Computer-readable storage medium can be, for example, but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or component, or any combination of the above.More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.Computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0177] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such a propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0178] The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wire, optical cable, radio frequency (RF), etc., or any suitable combination of the foregoing.

[0179] The computer program code for performing the operations of the present application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (e.g., using an Internet service provider to connect via the Internet).

[0180] The above description is merely an exemplary embodiment of the present application and is not intended to limit the scope of protection of the present application.

[0181] It will be appreciated by those skilled in the art that the term user terminal covers any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser or a vehicle-mounted mobile station.

[0182] In general, various embodiments of the present application may be implemented in hardware or dedicated circuits, software, logic, or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device, although the present application is not limited thereto.

[0183] Embodiments of the present application may be implemented by executing computer program instructions by a data processor of a mobile device, for example, in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.

[0184] The block diagram of any logical flow in the drawings of this application may represent program steps, or may represent interconnected logical circuits, modules and functions, or may represent a combination of program steps and logical circuits, modules and functions. A computer program may be stored on a memory. The memory may be of any type suitable for the local technical environment and may be implemented using any suitable data storage technology, such as but not limited to read-only memory (ROM), random access memory (RAM), optical storage devices and systems (digital versatile discs (DVD) or compact disks (CD), etc.). Computer-readable media may include non-transitory storage media. The data processor may be of any type suitable for the local technical environment, such as but not limited to a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), and a processor based on a multi-core processor architecture.

[0185] The above description of exemplary embodiments of the present application has been provided by way of exemplary and non-limiting examples. However, various modifications and adaptations of the above embodiments will be apparent to those skilled in the art, when considered in conjunction with the accompanying drawings and the appended claims, without departing from the scope of the present application. Therefore, the proper scope of the present application will be determined by reference to the appended claims.

Claims

1. A wireless communication method, applied to a secondary base station node in dual-link communication, comprising: Receiving secondary node key modification instruction information; Perform cell switching according to the secondary node key modification indication information.

2. The wireless communication method according to claim 1, before receiving the secondary node key modification request information, further comprising: Send a secondary node key modification request message to the primary base station node.

3. The wireless communication method according to claim 2, wherein: The sending of secondary node key modification request information to the primary base station node includes: When the secondary node key update condition is met, a secondary node key modification request message is sent to the primary base station node.

4. The wireless communication method according to claim 1, wherein: The performing cell switching according to the secondary node key modification indication information includes: Perform cell switching according to the cell switching indication in the secondary node key modification indication information.

5. The wireless communication method according to claim 1, after performing cell switching according to the secondary node key modification indication information, further comprising: Determine the cell after the handover as the target cell; Generate secondary node key modification response information according to the target cell, and send the key modification response information to the main base station node, so that the main base station node performs wireless resource connection configuration for the terminal device corresponding to the secondary base station node according to the secondary node key modification response information.

6. The wireless communication method according to claim 5, wherein: The secondary node key modification response information includes target cell configuration information for accessing the target cell.

7. The wireless communication method according to claim 5, after sending the key modification response information to the primary base station node, further comprising: In case of receiving the wireless resource connection configuration response information of the terminal device, the new secondary node key in the secondary node key modification indication information is enabled to perform data transmission with the terminal device based on the new secondary node key.

8. The wireless communication method according to any one of claims 3 to 7, wherein: The secondary node key update condition includes that a packet data convergence PDCP count value is greater than a preset rollover threshold value.

9. A wireless communication method, applied to a master base station node in dual-link communication, comprising: Sending secondary node key modification indication information to a secondary base station node, so that the secondary base station node performs cell switching according to the secondary node key modification indication information; receiving a secondary node key modification response message, and constructing wireless resource connection configuration information according to the secondary node key modification response message; The wireless resource connection configuration information is sent to a terminal device corresponding to the secondary base station node, so that the terminal device switches to the cell after the secondary base station node is switched according to the wireless resource connection configuration information.

10. The wireless communication method according to claim 9, wherein: The sending of secondary node key modification indication information to the secondary base station node includes: When receiving the secondary node key modification request information, sending the secondary node key modification indication information to the secondary base station node; or When the master node key update condition is met, secondary node key modification indication information is sent to the secondary base station node.

11. The wireless communication method according to claim 9, wherein said constructing wireless resource connection configuration information according to said secondary node key modification response information comprises: The radio resource connection configuration information is constructed according to the target cell configuration information and the secondary base station node count value in the secondary node key modification response information.

12. The wireless communication method according to claim 10, wherein: The master node key update condition includes access layer key update or exceeding the key operation period.

13. A wireless communication method, applied to a terminal device in dual-link communication, comprising: Receiving wireless resource connection configuration information; Performing cell switching according to the wireless resource connection configuration information; The wireless resource connection configuration information is information constructed by the primary base station node according to the secondary node key modification response information and the secondary base station node count value; The secondary node key modification response information is response information after the secondary base station node performs cell switching according to the secondary node key modification indication information, and the secondary node key modification response information includes target cell configuration information.

14. The wireless communication method according to claim 13, wherein: The performing cell switching according to the wireless resource connection configuration information includes: Determine the target cell according to the target cell configuration information in the radio resource connection configuration information; Switch to the target cell.

15. The wireless communication method according to claim 13, after performing cell switching according to the wireless resource connection configuration information, further comprising: Sending a radio resource connection configuration response message to the secondary base station node; A key corresponding to the secondary base station node, which is determined according to the secondary base station node count value in the radio resource connection configuration information, is enabled to perform data transmission with the secondary base station node based on the key.

16. A wireless communication device, applied to a secondary base station node in dual-link communication, comprising: An indication information receiving module, used for receiving secondary node key modification indication information; The first cell switching module is used to perform cell switching according to the secondary node key modification indication information.

17. A wireless communication device, applied to a master base station node in dual-link communication, comprising: An indication information sending module, used for sending secondary node key modification indication information to a secondary base station node, so that the secondary base station node performs cell switching according to the secondary node key modification indication information; A configuration information building module, used to receive the secondary node key modification response information, and build the wireless resource connection configuration information according to the secondary node key modification response information; The configuration information sending module is used to send the wireless resource connection configuration information to the terminal device corresponding to the secondary base station node, so that the terminal device switches to the cell after the secondary base station node is switched according to the wireless resource connection configuration information.

18. A wireless communication device, applied to a terminal device in dual-link communication, comprising: A configuration information receiving module, used to receive wireless resource connection configuration information; A second cell switching module, configured to perform cell switching according to the wireless resource connection configuration information; The wireless resource connection configuration information is information constructed by the primary base station node according to the secondary node key modification response information and the secondary base station node count value; The secondary node key modification response information is response information after the secondary base station node performs cell switching according to the secondary node key modification indication information, and the secondary node key modification response information includes target cell configuration information.

19. A communication node, comprising: A memory, a processor, a program stored in the memory and executable on the processor, and a data bus for realizing connection communication between the processor and the memory, wherein the program, when executed by the processor, realizes the wireless communication method according to any one of claims 1 to 15.

20. A storage medium for computer-readable storage, wherein the storage medium stores at least one program, and the at least one program can be executed by at least one processor to implement the wireless communication method according to any one of claims 1 to 15.

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