RRC connection maintenance method, related equipment and readable storage medium

Abstract

The present application discloses an RRC connection maintenance method, related equipment and readable storage medium, which belongs to the field of communication technology. The RRC connection maintenance method includes: a master terminal establishes a first RRC connection with a network side device; wherein the master terminal is a terminal among Q terminals, the master terminal supports transmission of information of some or all of the Q terminals, the Q terminals support common reception of data of a first service, and Q is an integer greater than 1.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to an RRC connection maintenance method, related equipment and a readable storage medium. Background Art

[0002] In the existing mechanism, each terminal establishes its own control plane connection and user plane connection with the core network / access network, such as: the non-access stratum (NAS) connection of the core network control plane, the radio resource control (RRC) connection of the access network control plane, the protocol data unit (PDU) session of the core network user plane, and the data radio bearer (DRB) or quality of service (QoS) flow of the access network user plane. In other words, the control plane connection and user plane connection of each terminal are independent of each other. Therefore, the RRC connection maintenance and service transmission of each terminal are independent of each other.

[0003] According to the existing mechanism, if two terminals are expected to continuously transmit a common service, the user needs to set the reception and reception progress of the service on one of the terminals in order to achieve the effect of continuous reception of the same service by the two terminals, resulting in low autonomy for multiple terminals to jointly receive the same service. Summary of the invention

[0004] The embodiments of the present application provide an RRC connection maintenance method, related equipment and readable storage medium, which can solve the problem of low autonomy of multiple terminals receiving the same service in the prior art.

[0005] In a first aspect, a RRC connection maintenance method is provided, the method comprising:

[0006] The master terminal establishes a first RRC connection with the network side device;

[0007] The master terminal is a terminal among Q terminals, the master terminal supports transmission of information of some or all of the Q terminals, the Q terminals support common reception of data of the first service, and Q is an integer greater than 1.

[0008] In a second aspect, a RRC connection maintenance method is provided, the method comprising:

[0009] The secondary terminal performs a third operation, where the third operation includes at least one of the following:

[0010] In the case where an RRC connection is not established with a network side device, the information of the secondary terminal is transmitted between the secondary terminal and the network side device through the primary terminal;

[0011] Establishing a second RRC connection with the network side device;

[0012] The auxiliary terminal is any auxiliary terminal among Q terminals, the Q terminals support receiving data of the first service together, the Q terminals include the main terminal, and Q is an integer greater than 1.

[0013] In a third aspect, a RRC connection maintenance method is provided, the method comprising:

[0014] The network side device maintains P RRC connections, and the P RRC connections are located between the network side device and a second target terminal. The second target terminal includes some or all of the Q terminals. The Q terminals support the common reception of data of the first service. P is a positive integer and Q is an integer greater than 1.

[0015] In a fourth aspect, an RRC connection maintenance device is provided, including:

[0016] A first establishing module, used to establish a first RRC connection with a network side device;

[0017] The master terminal is a terminal among Q terminals, the master terminal supports transmission of information of some or all of the Q terminals, the Q terminals support common reception of data of the first service, and Q is an integer greater than 1.

[0018] In a fifth aspect, an RRC connection maintenance device is provided, including:

[0019] The fourth execution module is configured to execute a third operation, where the third operation includes at least one of the following:

[0020] In the case where an RRC connection is not established with a network side device, the information of the secondary terminal is transmitted between the secondary terminal and the network side device through the primary terminal;

[0021] Establishing a second RRC connection with the network side device;

[0022] The auxiliary terminal is any auxiliary terminal among Q terminals, the Q terminals support receiving data of the first service together, the Q terminals include the main terminal, and Q is an integer greater than 1.

[0023] In a sixth aspect, an RRC connection maintenance device is provided, including:

[0024] A maintenance module is used to maintain P RRC connections, where the P RRC connections are located between the network side device and a second target terminal, where the second target terminal includes some or all of the Q terminals, and the Q terminals support jointly receiving data of a first service, where P is a positive integer and Q is an integer greater than 1.

[0025] In the seventh aspect, a communication device is provided, which terminal includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect, the second aspect or the third aspect are implemented.

[0026] In an eighth aspect, a communication device is provided, including a processor and a communication interface;

[0027] Wherein, in the case where the communication device is a main terminal, the communication interface is used for:

[0028] Establishing a first RRC connection with a network side device;

[0029] The master terminal is a terminal among Q terminals, the master terminal supports transmission of information of some or all of the Q terminals, the Q terminals support common reception of data of the first service, and Q is an integer greater than 1.

[0030] In the case where the communication device is a secondary terminal, the communication interface is used for:

[0031] Perform a third operation, where the third operation includes at least one of the following:

[0032] In the case where an RRC connection is not established with a network side device, the information of the secondary terminal is transmitted between the secondary terminal and the network side device through the primary terminal;

[0033] Establishing a second RRC connection with the network side device;

[0034] The auxiliary terminal is any auxiliary terminal among Q terminals, the Q terminals support receiving data of the first service together, the Q terminals include the main terminal, and Q is an integer greater than 1.

[0035] In the case where the communication device is a network side device, the communication interface is used to:

[0036] Maintain P RRC connections, where the P RRC connections are located between the network side device and a second target terminal, where the second target terminal includes some or all of the Q terminals, and where the Q terminals support jointly receiving data of a first service, where P is a positive integer and Q is an integer greater than 1.

[0037] In a ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect, the second aspect or the third aspect are implemented.

[0038] In the tenth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the first aspect, the second aspect or the third aspect.

[0039] In the eleventh aspect, a computer program / program product is provided, wherein the computer program / program product is stored in a non-volatile storage medium, and the program / program product is executed by at least one processor to implement the method as described in the first aspect, the second aspect or the third aspect.

[0040] In the embodiment of the present application, the master terminal among the Q terminals supports the transmission of information of some or all of the Q terminals, and the network side device can perform unified or independent RRC connection maintenance for at least two of the Q terminals. In this way, the Q terminals can realize the common reception of the same service under the control of the network side device, thereby improving the autonomy of the Q terminals in receiving the same service together, and further improving the service experience and system efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a schematic diagram of a wireless communication system provided in an embodiment of the present application;

[0042] Figure 2 It is one of the flow charts of the RRC connection maintenance method provided in the embodiment of the present application;

[0043] Figure 3 This is the second flowchart of the RRC connection maintenance method provided in the embodiment of the present application;

[0044] Figure 4 This is the third flowchart of the RRC connection maintenance method provided in the embodiment of the present application;

[0045] Figure 5 It is one of the structural diagrams of the RRC connection maintenance device provided in the embodiment of the present application;

[0046] Figure 6 This is the second structural diagram of the RRC connection maintenance device provided in the embodiment of the present application;

[0047] Figure 7 This is the third structural diagram of the RRC connection maintenance device provided in the embodiment of the present application;

[0048] Figure 8 is a structural diagram of a communication device provided in an embodiment of the present application;

[0049] Fig. 9 is a structural diagram of a terminal provided in an embodiment of the present application;

[0050] Fig.10 It is a structural diagram of the network side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0052] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0053] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to applications other than NR system applications, such as the 6th generation (6 th Generation, 6G) communication system.

[0054] Figure 11 is a schematic diagram of a wireless communication system provided in an embodiment of the present application. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can also be referred to as a terminal device or a user terminal (User Equipment, UE), and the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), a wearable device (Wearable Device) or a vehicle-mounted device (VUE), a pedestrian terminal (PUE) and other terminal side devices, and the wearable device includes: a smart watch, a bracelet, a headset, glasses, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 can be a base station or a core network, wherein the base station can be referred to as a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a B node, an evolved B node (eNB), a home B node, a home evolved B node, a WLAN access point, a WiFi node, a transmitting and receiving point (Transmitting Receiving Point, TRP) or some other suitable term in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

[0055] The embodiments of the present application are described in detail below through some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0056] See also Figure 2 , Figure 2 This is one of the flow charts of the RRC connection maintenance method provided in the embodiment of the present application.

[0057] like Figure 2 As shown, the following steps may be included:

[0058] Step 201: The master terminal establishes a first RRC connection with a network side device.

[0059] The master terminal is a terminal among Q terminals, and Q is an integer greater than 1. The Q terminals may include a master terminal and Q-1 auxiliary terminals. The master terminal among the Q terminals may be determined based on at least one of the following: the order of access to the network; the capabilities of the terminals; the link quality of the terminals. In practical applications, the master terminal among the Q terminals may be changed. For example, in the case where the master terminal is determined based on the link quality of the terminals, it is assumed that the Q terminals include UE1 and UE2. At a first time point, the link quality of UE1 is higher than the link quality of UE2, then UE1 may be determined as the master terminal at this time; if at a second time point, the link quality of UE2 improves and the link quality of UE2 is higher than the link quality of UE1, then UE2 may be determined as the master terminal at this time.

[0060] In the embodiment of the present application, the Q terminals can support jointly receiving data of the first service, that is, the Q terminals can support jointly receiving data of the same service. In the embodiment of the present application, the Q terminals supporting jointly receiving data of the same service can be regarded as having an associated relationship.

[0061] The Q terminals support jointly receiving data of the first service, which may be specifically manifested as any of the following:

[0062] The types of data of the first service received by the Q terminals are different, that is, different types of data of the first service are transmitted in different terminals, for example, different data streams are transmitted in different terminals. Data streams can be distinguished by QoS flow, and data with the same or similar QoS requirements can be mapped to the same QoS flow. In implementation, different data streams of the first service can be transmitted to the bearers (Radio Bearer, RB) corresponding to different terminals. For example, a user can use UE1 to receive data streams 1 and 2 of the first service, and use UE2 to receive data streams 3 and 4 of the first service.

[0063] The data of the first service received by the Q terminals are of the same type, that is, the same type of data of the first service is divided or copied and transmitted at different terminals, for example, the same data stream is transmitted at different terminals. In implementation, the data of the same RB corresponding to the first service may be divided or copied and transmitted to different terminals. For example, a user can use UE1 and UE2 to receive data streams 1 and 2 of the first service at the same time, and the data of the first service received by UE1 and the data of the first service received by UE2 are the same or different. If they are the same, the data can be detected and deleted for duplication, and if they are different, the received data can be sorted.

[0064] It can be understood that the first RRC connection is between the master terminal and the network side device. After the master terminal establishes the RRC connection with the network side device, it can directly communicate with the network side device through the communication interface between the master terminal and the network side device.

[0065] In an embodiment of the present application, the master terminal may support transmission of information of some or all of the Q terminals, that is, the master terminal may be used to transmit information of some or all of the Q terminals.

[0066] During implementation, the main terminal supports transmission of information of some or all of the Q terminals, which may include at least one of the following: supports transmission of information of the main terminal; supports transmission of information of some or all of the auxiliary terminals among the Q terminals.

[0067] It should be noted that in the embodiments of the present application, the main terminal supports the transmission of information of a certain terminal, which does not mean that the information of the terminal must be transmitted through the main terminal. For example: assuming that the main terminal supports the transmission of information of auxiliary terminal a, when auxiliary terminal a has not established an RRC connection with the network side device, the information of auxiliary terminal a can be transmitted through the main terminal agent (that is, the configuration information or reporting information of the auxiliary terminal is carried in the signaling of the main terminal, and the auxiliary terminal does not have its own signaling process); when auxiliary terminal a has established an RRC connection with the network side device, the information of auxiliary terminal a can be directly transmitted through the communication interface between auxiliary terminal a and the network side device, or it can be transferred through the main terminal (also called relay, intermediate transmission or assisted transmission). In addition, the information of the main terminal can also be transferred and transmitted through other auxiliary terminals that establish an RRC connection with the network side device. The specific details can be determined according to the actual situation, and the embodiments of the present application do not limit this.

[0068] The information of the terminal may include at least one of the following: uplink information of the terminal; downlink information of the terminal. Optionally, the downlink information may include at least one of the following: bearer configuration information; measurement configuration information; security configuration information; DC configuration information; carrier aggregation (CA) configuration information. Further, the bearer configuration information may include at least one of the following: at least one RB configuration, carrying the configuration of the service data adaptation protocol (SDAP) layer, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, the media access control (MAC) layer, and the physical (PHY) layer; at least one RLC bearer configuration, carrying the configuration of the RLC layer, the MAC layer, and the PHY layer. The uplink information may include at least one of the following: measurement reporting information; auxiliary information.

[0069] In the RRC connection maintenance method of the present application, a master terminal among Q terminals establishes a first RRC connection with a network side device, and the master terminal supports transmission of information of some or all of the Q terminals, and the Q terminals support common reception of data of a first service, where Q is an integer greater than 1. In this way, the network side device can achieve common reception of the same service by some or all of the Q terminals by maintaining the RRC connection between the master terminal and the network side device, thereby improving the autonomy of multiple terminals in receiving the same service together, and further improving service experience and system efficiency.

[0070] In the embodiment of the present application, the interaction mode between the Q terminals and the network side device is related to whether the Q terminals establish an RRC connection with the network side device, which is specifically described as follows:

[0071] Case 1: Among the Q terminals, only the master terminal establishes an RRC connection with the network side device.

[0072] In this case, the master terminal can support the transmission of information of the Q terminals and can be used to transmit information of the Q terminals. In this way, even if the auxiliary terminal among the Q terminals does not establish an RRC connection with the network side device, communication with the network side device can be achieved through the master terminal.

[0073] In specific implementation, the information of the main terminal can be directly transmitted through the communication interface between the main terminal and the network side device. As for the information of the auxiliary terminal, since the auxiliary terminal does not establish an RRC connection with the network side device, the information of the auxiliary terminal can be transmitted through the main terminal agent.

[0074] Optionally, after the master terminal establishes the first RRC connection with the network side device, the method further includes:

[0075] The master terminal performs a first operation, where the first operation includes at least one of the following:

[0076] receiving first downlink information of a first auxiliary terminal sent by the network side device, and sending the first downlink information to the first auxiliary terminal, where the first auxiliary terminal is any auxiliary terminal among the Q terminals;

[0077] Receive first uplink information sent by a second auxiliary terminal, and send the first uplink information to the network side device, where the second auxiliary terminal is any auxiliary terminal among the Q terminals.

[0078] In this implementation, the primary terminal may proxy the transmission of the secondary terminal's information between the secondary terminal and the network-side device.

[0079] In specific implementation, for the downlink information of the auxiliary terminal, the network side device can send it to the main terminal through the communication interface between the main terminal and the network side device, and then the main terminal sends it to the auxiliary terminal through the communication interface between terminals.

[0080] For the uplink information of the auxiliary terminal, the auxiliary terminal may send it to the main terminal through the communication interface between the terminals, and then the main terminal sends it to the network side device through the communication interface between the main terminal and the network side device.

[0081] It can be seen that in this case, the network side device can realize unified maintenance of the RRC connections of the Q terminals by maintaining the first RRC connection. In this way, the Q terminals can realize common reception of the same service under the control of the network side device, thereby improving the autonomy of the Q terminals in jointly receiving the same service, and further improving the service experience and system efficiency.

[0082] In the case where the information of the auxiliary terminal is transmitted through the proxy of the main terminal, the information of the auxiliary terminal in transmission can be protected, thereby improving the transmission reliability of the information of the auxiliary terminal. Optionally, the information of the auxiliary terminal satisfies at least one of the following:

[0083] The downlink information of the auxiliary terminal is sent by the network side device using the first security mechanism and by the main terminal using the second security mechanism; or, the downlink information of the auxiliary terminal is sent by the network side device using the third security mechanism;

[0084] The uplink information of the auxiliary terminal is sent by the auxiliary terminal using the second security mechanism and by the main terminal using the first security mechanism; or, the uplink information of the auxiliary terminal is sent by the auxiliary terminal using the third security mechanism;

[0085] Among them, the first security mechanism is the security mechanism between the network side device and the main terminal, the second security mechanism is the security mechanism between the main terminal and the auxiliary terminal; the third security mechanism is the security mechanism between the network side device and the auxiliary terminal.

[0086] In this optional implementation, in the first implementation, the information of the auxiliary terminal is segmented and securely protected between the main terminal and the network side device, and between the main terminal and the auxiliary terminal. Specifically, between the main terminal and the network side device, the information of the auxiliary terminal can reuse the security mechanism between the main terminal and the network side device; between the main terminal and the auxiliary terminal, the main terminal is a trusted terminal, and it trusts the auxiliary terminal, and the information of the auxiliary terminal is securely protected using the security mechanism between the main terminal and the auxiliary terminal. In this implementation, the information of the auxiliary terminal is plain text information for the main terminal.

[0087] In the second implementation, an end-to-end security mechanism is established between the auxiliary terminal and the network side device, and the information of the auxiliary terminal is protected by the security mechanism. In this implementation, the information of the auxiliary terminal is encrypted information for the main terminal, so that the main terminal can avoid rewriting the information of the auxiliary terminal, thereby further improving the transmission reliability of the information of the auxiliary terminal.

[0088] In an embodiment of the present application, in order to enable Q terminals to receive the same service together, the network side device can establish a first architecture for common transmission of the Q terminals.

[0089] The first architecture of the embodiment of the present application can be understood as being similar to an inverted dual connection (DC) architecture, because the DC architecture is used for data transmission between one terminal and two network-side devices, while the first architecture is used for data transmission between Q terminals and one network-side device. In addition, since the first architecture includes multiple terminals and is used for common transmission of multiple terminals, the first architecture can also be called a multi-UE architecture or a multi-UE common transmission architecture.

[0090] In case 1, the master terminal may trigger the network-side device to establish the first architecture in the following manner:

[0091] Optionally, after the master terminal establishes the first RRC connection with the network side device, the method further includes:

[0092] The master terminal sends first information to the network side device, where the first information indicates that the master terminal expects to receive data of the first service together with other terminals.

[0093] In this embodiment, the master terminal can trigger the network side device to establish the first architecture through the first information, and the first information can be regarded as the request information of the master terminal requesting to establish the first architecture. After establishing the first architecture, the network side device can send the first service through the first architecture to realize the common reception of the first service by the Q terminals.

[0094] In actual applications, after receiving the first information, the network side device can first perform a basic authentication and verification process, and after the verification is passed, establish the first architecture, so that the transmission reliability of the first architecture can be improved. During implementation, the authentication and verification process can be performed by the core network, or the core network can send the authentication information to the base station for storage, and the base station can perform verification based on the stored information.

[0095] It should be noted that, when requesting to establish the first architecture, the master terminal may or may not indicate which terminals the network-side device itself expects to receive data of the first service together.

[0096] In the scenario where no indication is given, the network side device may determine the secondary terminal that receives the same service as the primary terminal based on the terminal associated with the primary terminal, such as: the first architecture may include Q-1 secondary terminals associated with the same family package as the primary terminal, but is not limited thereto. In this way, signaling overhead can be saved.

[0097] In the indicated scenario, the primary terminal may report the identification information of the secondary terminal to the network side device, thereby improving the flexibility of the secondary terminal determination.

[0098] Optionally, the first information may also include relevant information of at least one auxiliary terminal, and the relevant information includes at least one of the following: identification information; authentication information; capability information; auxiliary information; wherein the Q terminals include the at least one auxiliary terminal.

[0099] During implementation, the identification information of the auxiliary UE may be expressed as a Serving-Temporary Mobile Subscription Identifier (S-TMSI), but is not limited thereto. The authentication information of the auxiliary UE may also be referred to as authorization information, which is used by the core network and the radio access network (Radio Access Network, RAN) to verify the permission of the first architecture. The capability information of the auxiliary UE is used to provide a suitable configuration for the auxiliary UE. The auxiliary information of the auxiliary UE may include at least one of the following: the power saving requirements of the auxiliary UE; the transmission requirements of the auxiliary UE, etc.

[0100] Case 2: The Q terminals establish RRC connections with the network side device respectively.

[0101] In the second scenario, the following implementations may be included:

[0102] First implementation mode: each terminal communicates directly through the interface between itself and the network side device.

[0103] In the first implementation, the transmission pipeline of the information of each terminal is independent, and all are transmitted through the interface between the terminal and the network side device. For example, assuming that the Q terminals include UE1 and UE2, then the information of UE1 is transmitted through the interface between UE1 and the network side device, and the information of UE2 is transmitted through the interface between UE2 and the network side device. In this case, the master terminal can only support the transmission of the information of the master terminal.

[0104] Second implementation mode: Information of at least one terminal among the Q terminals is transferred through other terminals.

[0105] In the second embodiment, although each of the Q terminals establishes an RRC connection with the network side device, some terminals may be affected by factors such as capability or link quality, causing these terminals to temporarily lose the ability to transmit uplink (UpLink, UL) and / or downlink (DownLink, DL) RRC signaling. At this time, these terminals need to rely on other terminals to transmit their own information.

[0106] Optionally, after the master terminal establishes the first RRC connection with the network side device, the method further includes:

[0107] The master terminal performs a second operation, where the second operation includes at least one of the following:

[0108] receiving second downlink information of a fourth auxiliary terminal sent by the network side device, and sending the second downlink information to the fourth auxiliary terminal, where the fourth auxiliary terminal is any auxiliary terminal among the Q terminals;

[0109] Receive second uplink information sent by a fifth auxiliary terminal, and send the second uplink information to the network side device, where the fifth auxiliary terminal is any auxiliary terminal among the Q terminals.

[0110] In this optional implementation, the downlink information of the fourth auxiliary terminal is transferred through the main terminal, and the fourth auxiliary terminal can be any auxiliary terminal among the Q terminals that does not have the transmission capability of DL RRC signaling. The uplink information of the fifth auxiliary terminal is transferred through the main terminal, and the fifth auxiliary terminal can be any auxiliary terminal among the Q terminals that does not have the transmission capability of UL RRC signaling.

[0111] It can be seen that in an optional implementation, the master terminal can support the transmission of information of the secondary terminal that does not have the transmission capability of RRC signaling. Of course, the master terminal can also directly support the transmission of information of the Q terminals.

[0112] In practical applications, the fourth auxiliary terminal and the fifth auxiliary terminal may be the same auxiliary terminal or different auxiliary terminals. When the fourth auxiliary terminal and the fifth auxiliary terminal are the same auxiliary terminal, the information transmitted by the main terminal to the auxiliary terminal is bidirectional; when the fourth auxiliary terminal and the fifth auxiliary terminal are different auxiliary terminals, the information transmitted by the main terminal to the auxiliary terminal is unidirectional, and the information of one transmission direction of the auxiliary terminal is transferred by the main terminal, and the information of the other transmission direction is transmitted through the interface between the auxiliary terminal and the network side device.

[0113] Optionally, the information of the auxiliary terminal (such as the fourth auxiliary terminal or the fifth auxiliary terminal) may satisfy: the passed Packet Data Convergence Protocol PDCP layer is located in the auxiliary terminal, and the passed Radio Link Control RLC layer is located in the primary terminal.

[0114] In this implementation manner, the information of the secondary terminal may be transmitted through the RLC bearer path of the primary terminal and the PDCP and higher layer paths of the secondary terminal.

[0115] It can be seen that for the RRC connection of the secondary terminal, the RRC layer and the PDCP layer can be maintained end-to-end (between the secondary terminal and the base station), and the PDCP PDU can be transferred through the RLC Bearer of the primary terminal.

[0116] In actual applications, the transmission channel for transmitting the RRC signaling of the auxiliary terminal can be configured by the network side device. The auxiliary terminal or the main terminal reports the demand / request to the network side device, and the network side device can configure an appropriate path based on the demand / request to transmit the RRC signaling of the auxiliary terminal in a suitable transmission mode.

[0117] In the second case, the order in which the Q terminals establish the RRC connection is not limited. The RRC establishment of the secondary terminal may occur after the RRC establishment of the primary terminal, or may occur before the RRC establishment of the primary terminal.

[0118] Optionally, after the master terminal establishes the first RRC connection with the network side device, the method further includes at least one of the following:

[0119] The master terminal sends first information to the network side device, where the first information indicates that the master terminal expects to receive data of the first service together with other terminals;

[0120] The master terminal receives at least one dedicated random access resource sent by the network side device;

[0121] The primary terminal sends a dedicated random access resource to a third secondary terminal, where the third secondary terminal is any secondary terminal among the Q terminals.

[0122] In this optional implementation, the RRC establishment of the secondary terminal may occur after the RRC establishment of the primary terminal. The triggering condition for the network side device to establish the first architecture may be: receiving the first information sent by the primary terminal; or establishing an RRC connection with the secondary terminal using the dedicated random access resources allocated by the network side device, but is not limited to this.

[0123] In the case where the trigger condition is receiving the first information sent by the primary terminal, in one implementation, the network side device may determine the Q-1 terminals that first establish an RRC connection with the network side device after receiving the first information as the Q-1 secondary terminals in the first architecture. In another implementation, the network side device may send Q-1 dedicated random access resources to the primary terminal, and determine the Q-1 terminals that use the Q-1 dedicated random access resources to establish an RRC connection as the Q-1 secondary terminals in the first architecture.

[0124] When the trigger condition is that an RRC connection is established with a secondary terminal using dedicated random access resources allocated by the network side device, the network side device may pre-send the dedicated random access resources. In this case, the network side device may determine Q-1 terminals that establish an RRC connection using the pre-allocated dedicated random access resources as Q-1 secondary terminals in the first architecture.

[0125] Optionally, after the master terminal establishes the first RRC connection with the network side device, the method further includes:

[0126] The master terminal sends second information to the network side device, where the second information includes identification information of Q-1 secondary terminals among the Q terminals.

[0127] In this implementation, the Q terminals can establish RRC connections respectively. In order to enable the network side device to determine the association relationship of the Q terminals, in one implementation, the main terminal can report the identification information of Q-1 auxiliary terminals to the network side device; in another implementation, each auxiliary terminal can report the identification information of the main terminal to the network side device.

[0128] It should be noted that the above-mentioned method 1 and method 2 can be implemented independently or in combination. For example: the first part of the auxiliary terminals among the Q terminals can establish an RRC connection through a competitive random access process, and the second part of the auxiliary terminals among the Q terminals can establish an RRC connection by initiating a non-competitive random access process using dedicated random access resources allocated by the network side device. After establishing the RRC connection, the first part of the auxiliary terminals can report the identification information of the main terminal to the network side device through its own RRC signaling, so that the network side device knows the association relationship between the main terminal and the first part of the auxiliary terminals. For the second part of the auxiliary terminals, since they use the dedicated random access resources allocated by the network side device to initiate a non-competitive random access process to establish an RRC connection, the network side can know the association relationship between the main terminal and the second part of the auxiliary terminals.

[0129] See also Figure 3 , Figure 3 This is the second flowchart of the RRC connection maintenance method provided in the embodiment of the present application.

[0130] Figure 3 The RRC connection maintenance method is executed by the auxiliary terminal. Figure 3 The following steps may be included:

[0131] Step 301: The auxiliary terminal performs a third operation.

[0132] The third operation includes at least one of the following:

[0133] In the case where an RRC connection is not established with a network side device, the information of the secondary terminal is transmitted between the secondary terminal and the network side device through the primary terminal;

[0134] Establishing a second RRC connection with the network side device;

[0135] The auxiliary terminal is any auxiliary terminal among Q terminals, the Q terminals support receiving data of the first service together, the Q terminals include the main terminal, and Q is an integer greater than 1.

[0136] In the case where the information of the secondary terminal is transmitted through a primary terminal proxy, the information of the secondary terminal may satisfy at least one of the following:

[0137] The downlink information of the auxiliary terminal is sent by the network side device using the first security mechanism and by the main terminal using the second security mechanism; or, the downlink information of the auxiliary terminal is sent by the network side device using the third security mechanism;

[0138] The uplink information of the auxiliary terminal is sent by the auxiliary terminal using the second security mechanism and by the main terminal using the first security mechanism; or, the uplink information of the auxiliary terminal is sent by the auxiliary terminal using the third security mechanism;

[0139] Among them, the first security mechanism is the security mechanism between the network side device and the main terminal, the second security mechanism is the security mechanism between the main terminal and the auxiliary terminal; the third security mechanism is the security mechanism between the network side device and the auxiliary terminal.

[0140] In the embodiment of the present application, the secondary terminal may establish an RRC connection through a contention random access procedure or a non-contention random access procedure.

[0141] Optionally, the secondary terminal establishes a second RRC connection with the network side device, including:

[0142] The secondary terminal receives the dedicated random access resource sent by the primary terminal;

[0143] The secondary terminal uses the dedicated random access resource to establish a second RRC connection with the network side device.

[0144] In this implementation, the secondary terminal establishes an RRC connection through a non-contention random access process, and the network side device can know the association relationship between the primary terminal and the secondary terminal without additional signaling indication, thereby saving signaling overhead.

[0145] Optionally, after the secondary terminal establishes the second RRC connection with the network side device, the method further includes:

[0146] The secondary terminal sends third information to the network side device, where the third information includes identification information of the primary terminal.

[0147] In this embodiment, the secondary terminal establishes an RRC connection through a competitive random access process. In order to make the network side device aware of the association relationship between the primary terminal and the secondary terminal, the secondary terminal can indicate the identification information of the primary terminal through RRC signaling after establishing the RRC connection.

[0148] Optionally, after the secondary terminal establishes the second RRC connection with the network side device, the method further includes:

[0149] The secondary terminal performs a fourth operation, where the fourth operation includes at least one of the following:

[0150] Transmitting information of the auxiliary terminal through a first interface, where the first interface is a communication interface between the auxiliary terminal and the network side device;

[0151] The information of the auxiliary terminal is transferred between the auxiliary terminal and the network side device through a first target terminal, and the first target terminal is: the main terminal, or any other auxiliary terminal among the Q terminals.

[0152] In this embodiment, the information of the auxiliary terminal can be transmitted through the interface between itself and the network side device, or it can be transferred through the main terminal or other auxiliary terminals. The specific decision can be made based on actual conditions, and the embodiments of the present application do not limit this.

[0153] Optionally, in the case where the information of the auxiliary terminal is transferred through the first target terminal, the information of the auxiliary terminal satisfies: the PDCP layer passed through is located at the auxiliary terminal, and the RLC layer passed through is located at the first target terminal.

[0154] In the RRC connection maintenance method of this embodiment, the auxiliary terminal may or may not establish an RRC connection. When an RRC connection is not established, the information of the auxiliary terminal is transferred through the main terminal, and the network side device can achieve unified maintenance of the RRC connections of the Q terminals by maintaining the RRC connection between the main terminal and the network side device; when an RRC connection is established, the network side device maintains the RRC connections of the Q terminals separately. In this way, the Q terminals can achieve common reception of the same service under the control of the network side device, thereby improving the autonomy of the Q terminals in receiving the same service together, and further improving the service experience and system efficiency.

[0155] It should be noted that this embodiment is Figure 2 The embodiment of the auxiliary terminal corresponding to the method embodiment, therefore, can be referred to Figure 2 The relevant descriptions in the method embodiment can achieve the same beneficial effects. In order to avoid repeated descriptions, they will not be repeated here.

[0156] See also Figure 4 , Figure 4 This is the third flowchart of the RRC connection maintenance method provided in the embodiment of the present application. Figure 4 The RRC connection maintenance method is executed by the network side device. Figure 3 The following steps may be included:

[0157] Step 401: The network side device maintains P RRC connections, where the P RRC connections are located between the network side device and a second target terminal, where the second target terminal includes some or all of Q terminals, and the Q terminals support jointly receiving data of a first service, where P is a positive integer and Q is an integer greater than 1.

[0158] In practical applications, P can be less than or equal to Q, which may include the following cases:

[0159] 1) When P is equal to 1, the RRC connection may be between the network side device and a master terminal among the Q terminals.

[0160] Optionally, the network side device maintains P RRC connections, including:

[0161] The network side device establishes an RRC connection with the master terminal;

[0162] The network side device receives first information sent by the master terminal, where the first information indicates that the master terminal expects to receive data of the first service together with other terminals;

[0163] The network side device establishes a first architecture according to the first information, where the first architecture includes the Q terminals.

[0164] During implementation, the first information is used to trigger a network-side device to establish the first architecture.

[0165] Optionally, the first information further includes relevant information of at least one auxiliary terminal, and the relevant information includes at least one of the following: identification information; authentication information; capability information; auxiliary information;

[0166] The Q terminals include the at least one auxiliary terminal.

[0167] Optionally, after the network side device maintains P RRC connections, the method further includes at least one of the following:

[0168] The network side device sends the downlink information of the Q terminals to the master terminal;

[0169] The network side device receives uplink information of the Q terminals sent by the master terminal.

[0170] It should be noted that, in actual applications, the information of the Q terminals may be sent simultaneously or sequentially, which may be determined based on actual conditions and is not limited in this embodiment of the present application.

[0171] Optionally, the information of the secondary terminal among the Q terminals satisfies at least one of the following:

[0172] The downlink information of the auxiliary terminal is sent by the network side device using the first security mechanism and by the main terminal using the second security mechanism; or, the downlink information of the auxiliary terminal is sent by the network side device using the third security mechanism;

[0173] The uplink information of the auxiliary terminal is sent by the auxiliary terminal using the second security mechanism and by the main terminal using the first security mechanism; or, the uplink information of the auxiliary terminal is sent by the auxiliary terminal using the third security mechanism;

[0174] Among them, the first security mechanism is the security mechanism between the network side device and the main terminal, the second security mechanism is the security mechanism between the main terminal and the auxiliary terminal; the third security mechanism is the security mechanism between the network side device and the auxiliary terminal.

[0175] 2) When P is equal to Q, the Q RRC connections are respectively located between the network side device and the Q terminals, that is, one RRC connection is established between each terminal and the network side device.

[0176] Optionally, the network side device maintains P RRC connections, including:

[0177] The network side device establishes an RRC connection with the main terminal;

[0178] The network-side device establishes Q-1 RRC connections with Q-1 terminals respectively, and at least one of the Q-1 RRC connections is established using dedicated random access resources;

[0179] The network side device establishes a first architecture, which includes the master terminal and the Q-1 terminals.

[0180] In specific implementation, the Q-1 RRC connections can be established together or one by one, which can be determined according to actual conditions and is not limited in this embodiment of the present application.

[0181] Optionally, after the network side device establishes an RRC connection with the master terminal, and before the network side device establishes Q-1 RRC connections with Q-1 terminals respectively, the method further includes at least one of the following:

[0182] The network side device receives first information sent by the master terminal, where the first information indicates that the master terminal expects to receive data of the first service together with other terminals;

[0183] The network side device sends at least one dedicated random access resource to the master terminal.

[0184] Optionally, the network side device maintains P RRC connections, including:

[0185] The network side device establishes Q RRC connections with the Q terminals respectively;

[0186] The network side device establishes a first architecture according to the received third information, where the first architecture includes the Q terminals;

[0187] The third information is sent by a main terminal among the Q terminals, and the third information includes identification information of Q-1 auxiliary terminals among the Q terminals; or, the third information is sent by an auxiliary terminal among the Q terminals, and the third information sent by each auxiliary terminal includes identification information of the main terminal among the Q terminals.

[0188] Optionally, after the network side device maintains P RRC connections, the method further includes:

[0189] The network-side device performs a fifth operation, where the fifth operation includes at least one of the following:

[0190] Transmitting information of the seventh auxiliary terminal through a first interface, where the first interface is a communication interface between the network-side device and the seventh auxiliary terminal, and the seventh auxiliary terminal includes at least one auxiliary terminal among the Q terminals;

[0191] The information of the eighth auxiliary terminal is transmitted through the second interface, wherein the second interface is a communication interface between the network side device and the third target terminal, and the third target terminal is the main terminal among the Q terminals, or any auxiliary terminal among the Q terminals except the eighth auxiliary terminal; the eighth auxiliary terminal includes at least one auxiliary terminal among the Q terminals.

[0192] Optionally, the information of the eighth auxiliary terminal satisfies: the PDCP layer passed through is located at the eighth auxiliary terminal, and the RLC layer passed through is located at the second target terminal.

[0193] 3) When P is greater than 1 and less than Q, P of the Q terminals may establish an RRC connection. The information of each of the P terminals may be transmitted through the interface between itself and the network side device, or may be transferred through other terminals among the P terminals; the information of the other QP terminals may be transmitted through any terminal agent among the P terminals.

[0194] It should be noted that this embodiment is Figure 2 The embodiments of the network side device corresponding to the method embodiments can therefore be found in Figure 2 The relevant descriptions in the method embodiment can achieve the same beneficial effects. In order to avoid repeated descriptions, they will not be repeated here.

[0195] In the embodiment of the present application, the Xth auxiliary terminal (such as the first auxiliary terminal to the eighth auxiliary terminal) can be any terminal of the Q terminals. In practical applications, different Xth auxiliary terminals can be the same auxiliary terminal or different auxiliary terminals, which can be determined according to actual conditions, and the embodiment of the present application does not limit this.

[0196] The various optional implementation modes introduced in the embodiments of the present application may be implemented in combination with each other or may be implemented separately if they do not conflict with each other, and the embodiments of the present application are not limited to this.

[0197] For ease of understanding, the following examples are provided:

[0198] This application mainly solves the problem of RRC connection maintenance when two or more devices perform service transmission together, and may include the following contents:

[0199] To achieve uniform configuration of multiple devices, the network side can maintain RRC connections for multiple UEs in any of the following ways:

[0200] 1) Maintain an RRC connection between the master UE and the gNB. Information of other UEs, such as RRC configuration signaling and reporting signaling, can be proxied by the master UE.

[0201] 2) Maintain multiple RRC connections, one between each UE and the gNB, and each UE’s information is carried out by each UE individually;

[0202] 3) Maintain multiple RRC connections, one between each UE and the gNB. The UE information can be transmitted with the assistance of other UEs, such as the information of the secondary UE can be transmitted with the assistance of the primary UE.

[0203] The above three methods are described below in conjunction with embodiments.

[0204] Embodiment 1: One RRC connection, corresponding to 1).

[0205] First, the UE that first accesses the network can be determined as the master UE, and the master UE can be reconfigured later. The master UE is generally a UE with higher capabilities and better link quality.

[0206] When the master UE accesses the network, it establishes a legacy RRC connection with the gNB. The master UE then reports its desire to establish a multi-UE architecture and, optionally, reports information about other UEs to the network. The information about other UEs may include the following information or a combination thereof:

[0207] Identification information of the secondary UE, such as S-TMSI;

[0208] Authorization / authentication information of the secondary UE, used by the core network and RAN to verify the multi-UE architecture permission;

[0209] Capability information of the secondary UE, used to provide appropriate configuration for the secondary UE;

[0210] Other auxiliary information of the auxiliary UE, such as power saving requirements, transmission requirements, etc.

[0211] When the base station receives the request information for the multi-UE architecture, it can first perform a basic authentication and verification process. This process can be sent to the core network, or the core network can send the information to the base station in advance for storage. The base station itself verifies based on the stored information. After the verification is passed, the base station decides to establish a multi-UE common transmission architecture for two or more UEs.

[0212] The base station may send configuration information of each UE to the master UE, where the configuration information includes:

[0213] The main UE configuration information may include: the main UE's bearer configuration information, including N0 RB configurations, carrying SDAP, PDCP, RLC, MAC, and PHY layer configurations, and may also include M0 RLC bearer configurations, carrying RLC, MAC, and PHY layer configurations; measurement configuration information; security configuration information; DC or CA configuration information;

[0214] The auxiliary UE1 configuration information may include: bearer configuration information used by the auxiliary UE1, including N1 RB configurations, carrying SDAP, PDCP, RLC, MAC, and PHY layer configurations, and may also include M1 RLC bearer configurations, carrying RLC, MAC, and PHY layer configurations; measurement configuration information; security configuration information; DC or CA configuration information;

[0215] The auxiliary UE2 configuration information may include: the bearer configuration information used by the auxiliary UE2, including N2 RB configurations, carrying the configurations of the SDAP, PDCP, RLC, MAC, and PHY layers, and may also include M2 ​​RLC bearer configurations, carrying the configurations of the RLC, MAC, and PHY layers; measurement configuration information; security configuration information, DC or CA configuration information.

[0216] After receiving the above configuration information, the primary UE stores its own configuration information and executes it according to the configuration, and sends the configuration information of the secondary UE to the corresponding secondary UE.

[0217] The secondary UE receives the configuration information transmitted by the primary UE and executes according to the configuration.

[0218] When the secondary UE has content that needs to be reported through UL RRC signaling, such as measurement reporting or auxiliary information reporting, the secondary UE sends it to the primary UE through the inter-UE interface, and the primary UE organizes RRC signaling to report the information of the secondary UE together.

[0219] It should be noted that there are two ways to solve the security problem of auxiliary UE configuration:

[0220] One is to reuse the security configuration process of the primary UE. The primary UE and the secondary UE trust each other. The primary UE performs its own security operations, such as decryption and integrity verification, and obtains a plaintext message. When the primary UE sends a message to the secondary UE, it uses the interface process between them for security protection, which is equivalent to performing security maintenance separately between the gNB-primary UE and the primary UE-secondary UE. The configuration data is plaintext for the primary UE, so the primary UE needs to be a trusted UE.

[0221] The other is to establish end-to-end security operations between the secondary UE and the gNB, that is, the secondary UE establishes an end-to-end security mechanism between the primary UE and the gNB, so that the configuration information sent by the gNB to the secondary UE and the reverse reporting information can be protected by the end-to-end security mechanism. This is more secure and does not require much from the primary UE, because the data of the secondary UE is encrypted data that cannot be detected by it. This method is more secure.

[0222] Embodiment 2: Multiple RRC connections, corresponding to the above 2).

[0223] In this embodiment, RRC connection maintenance is performed for multiple UEs in a multi-UE architecture, that is, an independent RRC connection is established for each UE in the architecture, and configuration information and reporting information are independently transmitted through their own RRC connection.

[0224] In this embodiment, the primary UE may first establish an RRC connection. After the establishment is successful, the secondary UE also needs to establish its own RRC connection. There are two triggering methods:

[0225] One is that the primary UE reports the need to establish a multi-UE architecture, and informs the gNB of the situation of the secondary UEs, such as the total number of secondary UEs, etc. The gNB allocates dedicated random access resources to these secondary UEs, and the primary UE distributes the dedicated random access resources to different secondary UEs; then the secondary UE uses the dedicated resources to initiate a non-competitive random access process and establish an RRC connection with the network side.

[0226] The other is that the secondary UE initiates RRC connection establishment by itself. The secondary UE initiates competitive random access according to the existing UE behavior, and carries the RRC connection establishment request in message (Message, Msg) 3 or MsgA to establish an RRC connection with the gNB, and then informs itself that it is for the purpose of establishing a multi-UE architecture and sends its own primary UE identification information to the base station to facilitate the base station to configure subsequent associated bearers for these UEs; or after the RRC connection is established, the primary UE sends the identification information of the secondary UE to the base station to facilitate subsequent association.

[0227] When the RRC connections of the primary and secondary UEs are established, and their desire to establish a multi-UE architecture is also notified to the base station, the base station will subsequently configure bearers for the primary UE and the secondary UE respectively according to business requirements.

[0228] The main UE configuration information is sent through its own RRC process, and the content may include: the main UE's bearer configuration information, including N0 RB configurations, carrying SDAP, PDCP, RLC, MAC, and PHY layer configurations, and may also include M0 RLC bearer configurations, carrying RLC, MAC, and PHY layer configurations; measurement configuration information; security configuration information, DC or CA configuration information;

[0229] The auxiliary UE1 configuration information is sent through its own RRC process, and the content may include: bearer configuration information used by the auxiliary UE1, including N1 RB configurations, carrying SDAP, PDCP, RLC, MAC, and PHY layer configurations, and may also include M1 RLC bearer configurations, carrying RLC, MAC, and PHY layer configurations; measurement configuration information; security configuration information, DC or CA configuration information;

[0230] The base station ensures the consistency of the configuration.

[0231] When the primary UE or the secondary UE has any UL RRC reporting requirements, such as measurement reporting or auxiliary information reporting, they each use their own RRC connection to perform the reporting.

[0232] Embodiment 3: Multiple RRC connections + master UE assists transmission, corresponding to the above 3).

[0233] Based on the second embodiment, this embodiment introduces another method to perform RRC connection maintenance for multiple UEs in a multi-UE architecture, that is, to establish an independent RRC connection for each UE in the architecture, and the configuration information and reporting information are independently transmitted through their own RRC connection, but only the master UE has a DL and / or UL channel for transmitting RRC signaling.

[0234] In this embodiment, each UE establishes an RRC connection with the gNB, and the process is similar to that in Embodiment 2. The difference is that in Embodiment 2, the UL / DL RRC signaling of each UE is directly transmitted through the Uu interface between itself and the gNB, while in this embodiment, considering that the auxiliary UE may have limited uplink capability and may not have the ability to transmit DL / UL RRC signaling, it can be forwarded by the primary UE.

[0235] Generally speaking, the primary UE needs to establish a dedicated transmission channel for the RRC of the secondary UE, such as the transmission of the signaling radio bearer (SRB) 1 message. The PDCP can be located between the end-to-end secondary UE and gNB, while the RLC bearer is located between the primary UE and the base station. It is equivalent to transmitting the RRC signaling of the secondary UE through the transmission channel of the primary UE. It can be bidirectional or unidirectional. If it is unidirectional, it means that one direction is transmitted through the primary UE, and the other direction is responsible for transmission through its own Uu interface.

[0236] The establishment of the transmission pipeline is also configured by the base station. The secondary UE or the primary UE reports the demand / request to the gNB, and the gNB configures a suitable path for them to transmit the RRC signaling in a suitable transmission mode.

[0237] It can be seen that in the embodiment of the present application, the network side device can maintain one or more RRC connections in an architecture where multiple UEs transmit together.

[0238] If there is only one RRC connection, the RRC connection can be established between the primary UE and the base station. The configuration of other auxiliary UEs is carried in the RRC signaling of the primary UE; the UL reports of other auxiliary UEs are sent by the auxiliary UE to the primary UE and reported through the RRC process of the primary UE;

[0239] If multiple RRC connections are established, the primary UE and the secondary UE each have an RRC connection; the primary UE or the secondary UE reports to the network and a multi-UE architecture needs to be established, and the network ensures the consistency of the configuration for multiple UEs. The RRC signaling of the secondary UE can be transmitted through its own Uu interface or through the Uu interface of the primary UE. In the case where the RRC signaling of the secondary UE is transmitted through the Uu interface of the primary UE, the transmission path of the RRC signaling of the secondary UE can be configured by the base station, and the PDCP layer of the secondary UE SRB is located in the secondary UE, and the RLC bearer is located in the primary UE.

[0240] According to the RRC connection maintenance method provided in the embodiment of the present application, the RAN side can configure multiple UEs to maintain RRC connections separately or uniformly, so that the UE can transmit with multiple devices under the control of the network side, thereby ensuring the UE's service experience and system efficiency.

[0241] It should be noted that the RRC connection maintenance method provided in the embodiment of the present application can be executed by an RRC connection maintenance device, or a control module in the RRC connection maintenance device for executing the RRC connection maintenance method. In the embodiment of the present application, the RRC connection maintenance method is executed by an RRC connection maintenance device as an example to illustrate the RRC connection maintenance device provided in the embodiment of the present application.

[0242] See also Figure 5 , Figure 5 This is one of the structural diagrams of the RRC connection maintenance device provided in the embodiment of the present application.

[0243] like Figure 5 As shown, the RRC connection maintenance device 500 includes:

[0244] A first establishing module 501, configured to establish a first RRC connection with a network side device;

[0245] The master terminal is a terminal among Q terminals, the master terminal supports transmission of information of some or all of the Q terminals, the Q terminals support common reception of data of the first service, and Q is an integer greater than 1.

[0246] Optionally, among the Q terminals, only the master terminal establishes an RRC connection with the network side device.

[0247] Optionally, the RRC connection maintenance device 500 further includes:

[0248] The first sending module is used to send first information to the network side device, where the first information indicates that the main terminal expects to receive data of the first service together with other terminals.

[0249] Optionally, the first information further includes relevant information of at least one auxiliary terminal, and the relevant information includes at least one of the following: identification information; authentication information; capability information; auxiliary information;

[0250] The Q terminals include the at least one auxiliary terminal.

[0251] Optionally, the RRC connection maintenance device 500 further includes:

[0252] The first execution module is configured to execute a first operation, wherein the first operation includes at least one of the following:

[0253] receiving first downlink information of a first auxiliary terminal sent by the network side device, and sending the first downlink information to the first auxiliary terminal, where the first auxiliary terminal is any auxiliary terminal among the Q terminals;

[0254] Receive first uplink information sent by a second auxiliary terminal, and send the first uplink information to the network side device, where the second auxiliary terminal is any auxiliary terminal among the Q terminals.

[0255] Optionally, the information of the auxiliary terminal satisfies at least one of the following:

[0256] The downlink information of the auxiliary terminal is sent by the network side device using the first security mechanism and by the main terminal using the second security mechanism; or, the downlink information of the auxiliary terminal is sent by the network side device using the third security mechanism;

[0257] The uplink information of the auxiliary terminal is sent by the auxiliary terminal using the second security mechanism and by the main terminal using the first security mechanism; or, the uplink information of the auxiliary terminal is sent by the auxiliary terminal using the third security mechanism;

[0258] Among them, the first security mechanism is the security mechanism between the network side device and the main terminal, the second security mechanism is the security mechanism between the main terminal and the auxiliary terminal; the third security mechanism is the security mechanism between the network side device and the auxiliary terminal.

[0259] Optionally, the Q terminals establish RRC connections with network side devices respectively.

[0260] Optionally, the RRC connection maintenance device 500 further includes:

[0261] The second execution module is configured to:

[0262] Sending first information to the network side device, where the first information indicates that the master terminal expects to receive data of the first service together with other terminals;

[0263] Receiving at least one dedicated random access resource sent by the network side device;

[0264] A dedicated random access resource is sent to a third secondary terminal, where the third secondary terminal is any secondary terminal among the Q terminals.

[0265] Optionally, the RRC connection maintenance device 500 further includes:

[0266] The second sending module is used to send second information to the network side device, where the second information includes identification information of Q-1 auxiliary terminals among the Q terminals.

[0267] Optionally, the RRC connection maintenance device 500 further includes:

[0268] The third execution module is configured to execute a second operation, where the second operation includes at least one of the following:

[0269] receiving second downlink information of a fourth auxiliary terminal sent by the network side device, and sending the second downlink information to the fourth auxiliary terminal, where the fourth auxiliary terminal is any auxiliary terminal among the Q terminals;

[0270] Receive second uplink information sent by a fifth auxiliary terminal, and send the second uplink information to the network side device, where the fifth auxiliary terminal is any auxiliary terminal among the Q terminals.

[0271] Optionally, the information of the secondary terminal satisfies: the packet data convergence protocol PDCP layer passed through is located at the secondary terminal, and the radio link control RLC layer passed through is located at the primary terminal.

[0272] The RRC connection maintenance device 500 provided in the embodiment of the present application can achieve Figure 2 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0273] See also Figure 6 , Figure 6 This is the second structural diagram of the RRC connection maintenance device provided in the embodiment of the present application.

[0274] like Figure 6 As shown, the RRC connection maintenance device 600 includes:

[0275] The fourth execution module 601 is configured to execute a third operation, where the third operation includes at least one of the following:

[0276] In the case where an RRC connection is not established with a network side device, the information of the secondary terminal is transmitted between the secondary terminal and the network side device through the primary terminal;

[0277] Establishing a second RRC connection with the network side device;

[0278] The auxiliary terminal is any auxiliary terminal among Q terminals, the Q terminals support receiving data of the first service together, the Q terminals include the main terminal, and Q is an integer greater than 1.

[0279] Optionally, the information of the secondary terminal satisfies at least one of the following:

[0280] The downlink information of the auxiliary terminal is sent by the network side device using the first security mechanism and by the main terminal using the second security mechanism; or, the downlink information of the auxiliary terminal is sent by the network side device using the third security mechanism;

[0281] The uplink information of the auxiliary terminal is sent by the auxiliary terminal using the second security mechanism and by the main terminal using the first security mechanism; or, the uplink information of the auxiliary terminal is sent by the auxiliary terminal using the third security mechanism;

[0282] Among them, the first security mechanism is the security mechanism between the network side device and the main terminal, the second security mechanism is the security mechanism between the main terminal and the auxiliary terminal; the third security mechanism is the security mechanism between the network side device and the auxiliary terminal.

[0283] Optionally, the fourth execution module 601 is specifically configured to:

[0284] Receiving a dedicated random access resource sent by the master terminal;

[0285] Use the dedicated random access resource to establish a second RRC connection with the network side device.

[0286] Optionally, the RRC connection maintenance device 600 further includes:

[0287] The second sending module is used to send third information to the network side device, where the third information includes the identification information of the master terminal.

[0288] Optionally, the RRC connection maintenance device 600 further includes:

[0289] A fifth execution module is configured to execute a fourth operation, where the fourth operation includes at least one of the following:

[0290] Transmitting information of the auxiliary terminal through a first interface, where the first interface is a communication interface between the auxiliary terminal and the network side device;

[0291] The information of the auxiliary terminal is transferred between the auxiliary terminal and the network side device through a first target terminal, and the first target terminal is: the main terminal, or any other auxiliary terminal among the Q terminals.

[0292] Optionally, in the case where the information of the auxiliary terminal is transferred through the first target terminal, the information of the auxiliary terminal satisfies: the PDCP layer passed through is located at the auxiliary terminal, and the RLC layer passed through is located at the first target terminal.

[0293] The RRC connection maintenance device 600 provided in the embodiment of the present application can achieve Figure 3 The various processes implemented in the method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0294] See also Figure 7 , Figure 7 This is the second structural diagram of the RRC connection maintenance device provided in the embodiment of the present application.

[0295] like Figure 7 As shown, the RRC connection maintenance device 700 includes:

[0296] Maintenance module 701 is used to maintain P RRC connections, where the P RRC connections are located between the network side device and the second target terminal, where the second target terminal includes some or all of the Q terminals, and the Q terminals support jointly receiving data of the first service, where P is a positive integer and Q is an integer greater than 1.

[0297] Optionally, when P is equal to 1, the RRC connection is located between the network side device and a master terminal among the Q terminals.

[0298] Optionally, the maintenance module 701 is specifically configured to:

[0299] Establishing an RRC connection with the master terminal;

[0300] receiving first information sent by the master terminal, where the first information indicates that the master terminal expects to receive data of the first service together with other terminals;

[0301] A first architecture is established according to the first information, where the first architecture includes the Q terminals.

[0302] Optionally, the first information further includes relevant information of at least one auxiliary terminal, and the relevant information includes at least one of the following: identification information; authentication information; capability information; auxiliary information;

[0303] The Q terminals include the at least one auxiliary terminal.

[0304] Optionally, the RRC connection maintenance device 700 further includes at least one of the following:

[0305] A third sending module, used to send downlink information of the Q terminals to the master terminal;

[0306] The first receiving module is used to receive uplink information of the Q terminals sent by the master terminal.

[0307] Optionally, the information of the secondary terminal among the Q terminals satisfies at least one of the following:

[0308] The downlink information of the auxiliary terminal is sent by the network side device using the first security mechanism and by the main terminal using the second security mechanism; or, the downlink information of the auxiliary terminal is sent by the network side device using the third security mechanism;

[0309] The uplink information of the auxiliary terminal is sent by the auxiliary terminal using the second security mechanism and by the main terminal using the first security mechanism; or, the uplink information of the auxiliary terminal is sent by the auxiliary terminal using the third security mechanism;

[0310] Among them, the first security mechanism is the security mechanism between the network side device and the main terminal, the second security mechanism is the security mechanism between the main terminal and the auxiliary terminal; the third security mechanism is the security mechanism between the network side device and the auxiliary terminal.

[0311] Optionally, when P is equal to Q, the Q RRCs are respectively located between the network side device and the Q terminals.

[0312] Optionally, the maintenance module 701 is specifically configured to:

[0313] Establish an RRC connection with the master terminal;

[0314] Establishing Q-1 RRC connections with Q-1 terminals respectively, at least one of the Q-1 RRC connections being established using dedicated random access resources;

[0315] A first architecture is established, wherein the first architecture includes the master terminal and the Q-1 terminals.

[0316] Optionally, the RRC connection maintenance device 700 further includes at least one of the following:

[0317] A second receiving module, configured to receive first information sent by the master terminal, where the first information indicates that the master terminal expects to receive data of the first service together with other terminals;

[0318] The fourth sending module is used to send at least one dedicated random access resource to the master terminal.

[0319] Optionally, the maintenance module 701 is specifically configured to:

[0320] Establishing Q RRC connections with the Q terminals respectively;

[0321] Establishing a first architecture according to the received third information, wherein the first architecture includes the Q terminals;

[0322] The third information is sent by a main terminal among the Q terminals, and the third information includes identification information of Q-1 auxiliary terminals among the Q terminals; or, the third information is sent by an auxiliary terminal among the Q terminals, and the third information sent by each auxiliary terminal includes identification information of the main terminal among the Q terminals.

[0323] Optionally, the RRC connection maintenance device 700 further includes the following:

[0324] The sixth execution module is configured to execute a fifth operation, where the fifth operation includes at least one of the following:

[0325] Transmitting information of the seventh auxiliary terminal through a first interface, where the first interface is a communication interface between the network-side device and the seventh auxiliary terminal, and the seventh auxiliary terminal includes at least one auxiliary terminal among the Q terminals;

[0326] The information of the eighth auxiliary terminal is transmitted through the second interface, wherein the second interface is a communication interface between the network side device and the third target terminal, and the third target terminal is the main terminal among the Q terminals, or any auxiliary terminal among the Q terminals except the eighth auxiliary terminal; the eighth auxiliary terminal includes at least one auxiliary terminal among the Q terminals.

[0327] Optionally, the information of the eighth auxiliary terminal satisfies: the PDCP layer passed through is located at the eighth auxiliary terminal, and the RLC layer passed through is located at the second target terminal.

[0328] The RRC connection maintenance device 700 provided in the embodiment of the present application can achieve Figure 4 The various processes implemented in the method embodiment achieve the same technical effect and will not be described again here to avoid repetition.

[0329] The RRC connection maintenance device in the embodiment of the present application may be a device, a device or an electronic device with an operating system, or a component, an integrated circuit, or a chip in the device or electronic device. The device or electronic device may be a mobile terminal or a non-mobile terminal. Exemplarily, the mobile terminal may include but is not limited to the types of terminals 11 listed above, and the non-mobile terminal may be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which are not specifically limited in the embodiment of the present application. The device or electronic device may be a network side device, which may include but is not limited to the types of network side devices 12 listed above, which are not specifically limited in the embodiment of the present application.

[0330] Optional, such as Figure 8 As shown, the embodiment of the present application further provides a communication device 800, including a processor 801, a memory 802, and a program or instruction stored in the memory 802 and executable on the processor 801. For example, when the communication device 800 is a master terminal, the program or instruction is executed by the processor 801 to implement the above Figure 2 When the communication device 800 is a secondary terminal, the program or instruction is executed by the processor 801 to implement the above Figure 3When the communication device 800 is a network side device, the program or instruction is executed by the processor 801 to implement the above Figure 4 The various processes of the method embodiments can achieve the same technical effect, and will not be described again here to avoid repetition.

[0331] An embodiment of the present application also provides a terminal, including a processor and a communication interface.

[0332] When the terminal is the aforementioned master terminal, the communication interface is used for:

[0333] Establishing a first RRC connection with a network side device;

[0334] The master terminal is a terminal among Q terminals, the master terminal supports transmission of information of some or all of the Q terminals, the Q terminals support common reception of data of the first service, and Q is an integer greater than 1.

[0335] In the case where the communication device is a secondary terminal, the communication interface is used for:

[0336] Perform a third operation, where the third operation includes at least one of the following:

[0337] In the case where an RRC connection is not established with a network side device, the information of the secondary terminal is transmitted between the secondary terminal and the network side device through the primary terminal;

[0338] Establishing a second RRC connection with the network side device;

[0339] The auxiliary terminal is any auxiliary terminal among Q terminals, the Q terminals support receiving data of the first service together, the Q terminals include the main terminal, and Q is an integer greater than 1.

[0340] This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation mode of the above-mentioned method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Fig. 9 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0341] The terminal 900 includes but is not limited to: a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, and at least some of the components of a processor 910.

[0342] Those skilled in the art will appreciate that the terminal 900 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 910 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig. 9 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0343] It should be understood that in the embodiment of the present application, the input unit 904 may include a graphics processor (Graphics Processing Unit, GPU) 9041 and a microphone 9042, and the graphics processor 9041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 906 may include a display panel 9061, and the display panel 9061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 907 includes a touch panel 9071 and other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 may include two parts: a touch detection device and a touch controller. Other input devices 9072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0344] In the embodiment of the present application, the radio frequency unit 901 receives downlink data from the network side device and sends it to the processor 910 for processing; in addition, the uplink data is sent to the network side device. Generally, the radio frequency unit 901 includes but is not limited to an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0345] The memory 909 can be used to store software programs or instructions and various data. The memory 909 can mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area can store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 909 can include a high-speed random access memory, and can also include a non-volatile memory, wherein the non-volatile memory can be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or a flash memory. For example, at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0346] The processor 910 may include one or more processing units; optionally, the processor 910 may be integrated into an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, and application programs or instructions, etc., and the modem processor mainly processes wireless communications, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 910.

[0347] Wherein, when the terminal is the aforementioned master terminal, the radio frequency unit 901 is used to:

[0348] Establishing a first RRC connection with a network side device;

[0349] The master terminal is a terminal among Q terminals, the master terminal supports transmission of information of some or all of the Q terminals, the Q terminals support common reception of data of the first service, and Q is an integer greater than 1.

[0350] In this case, the terminal 900 in this embodiment can implement the embodiment of the present application. Figure 2 Each process in the method embodiment achieves the same beneficial effect, and will not be described again here to avoid repetition.

[0351] When the communication device is a secondary terminal, the radio frequency unit 901 is configured to:

[0352] Perform a third operation, where the third operation includes at least one of the following:

[0353] In the case where an RRC connection is not established with a network side device, the information of the secondary terminal is transmitted between the secondary terminal and the network side device through the primary terminal;

[0354] Establishing a second RRC connection with the network side device;

[0355] The auxiliary terminal is any auxiliary terminal among Q terminals, the Q terminals support receiving data of the first service together, the Q terminals include the main terminal, and Q is an integer greater than 1.

[0356] In this case, the terminal 900 in this embodiment can implement the embodiment of the present application. Figure 3 Each process in the method embodiment achieves the same beneficial effect, and will not be described again here to avoid repetition.

[0357] The embodiment of the present application also provides a network side device, including a processor and a communication interface, the communication interface is used to: maintain P RRC connections, the P RRC connections are located between the network side device and a second target terminal, the second target terminal includes some or all of the Q terminals, the Q terminals support the common reception of data of the first service, P is a positive integer, and Q is an integer greater than 1. The network side device embodiment corresponds to the above-mentioned network side device method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to the network side device embodiment, and can achieve the same technical effect.

[0358] Specifically, the embodiment of the present application also provides a network side device. Fig.10 As shown, the network device 1000 includes: an antenna 101, a radio frequency device 102, and a baseband device 103. The antenna 101 is connected to the radio frequency device 102. In the uplink direction, the radio frequency device 102 receives information through the antenna 101 and sends the received information to the baseband device 103 for processing. In the downlink direction, the baseband device 103 processes the information to be sent and sends it to the radio frequency device 102. The radio frequency device 102 processes the received information and sends it out through the antenna 101.

[0359] The frequency band processing device may be located in the baseband device 103 . The method performed by the network-side device in the above embodiment may be implemented in the baseband device 103 . The baseband device 103 includes a processor 104 and a memory 105 .

[0360] The baseband device 103 may include, for example, at least one baseband board on which a plurality of chips are arranged. Fig.10 As shown, one of the chips is, for example, a processor 104, which is connected to a memory 105 to call a program in the memory 105 to execute the network device operations shown in the above method embodiment.

[0361] The baseband device 103 may further include a network interface 106 for exchanging information with the radio frequency device 102 . The interface may be, for example, a common public radio interface (CPRI).

[0362] Specifically, the network side device of the embodiment of the present application further includes: instructions or programs stored in the memory 105 and executable on the processor 104, and the processor 104 calls the instructions or programs in the memory 105 to execute Figure 3 Each process in the method embodiment, or, Figure 7 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0363] The embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, each process of the above-mentioned RRC connection maintenance method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. The computer-readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0364] The embodiment of the present application also provides a readable storage medium on which a program or instruction is stored. When the program or instruction is executed by a processor, the above Figure 2 , Figure 3 or Figure 4 The various processes of the method embodiments can achieve the same technical effect, and will not be described again here to avoid repetition.

[0365] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0366] The present application also provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the above Figure 2 , Figure 3 or Figure 4 The various processes of the method embodiments can achieve the same technical effect, and will not be described again here to avoid repetition.

[0367] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0368] It should be noted that, in this article, the term "comprises", "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0369] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0370] The above-mentioned drawings are used to describe the embodiments of the present application, but the present application is not limited to the above-mentioned specific implementation modes. The above-mentioned specific implementation modes are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A radio resource control (RRC) connection maintenance method, characterized in that: include: The master terminal establishes a first RRC connection with the network side device; The master terminal is a terminal among the Q terminals, the master terminal supports transmission of information of some or all of the Q terminals, the Q terminals support common reception of data of the first service, and Q is an integer greater than 1; Among the Q terminals, only the master terminal establishes an RRC connection with the network side device; After the master terminal establishes the first RRC connection with the network side device, the method further includes: The master terminal sends first information to the network side device, where the first information indicates that the master terminal expects to receive data of the first service together with other terminals; or, The Q terminals respectively establish RRC connections with the network side device; After the master terminal establishes the first RRC connection with the network side device, the method further includes: The master terminal sends first information to the network side device, where the first information indicates that the master terminal expects to receive data of the first service together with other terminals; The Q terminals support jointly receiving data of the first service, including any of the following: The data of the first service received by the Q terminals have different bearers, wherein different data streams of the first service are transmitted respectively at different terminals; The data of the first service received by the Q terminals have the same bearer, wherein the data of the same bearer of the first service are divided and transmitted by different terminals. If the data received by the different terminals are different, the received data are sorted.

2. The method according to claim 1, characterized in that After the master terminal establishes the first RRC connection with the network side device, the method further includes at least one of the following: The master terminal receives at least one dedicated random access resource sent by the network side device; The primary terminal sends a dedicated random access resource to a third secondary terminal, where the third secondary terminal is any secondary terminal among the Q terminals.

3. The method according to claim 1, characterized in that The first information also includes relevant information of at least one auxiliary terminal, and the relevant information includes at least one of the following: identification information; authentication information; capability information; auxiliary information; The Q terminals include the at least one auxiliary terminal.

4. The method according to claim 1, characterized in that After the master terminal establishes the first RRC connection with the network side device, the method further includes: The master terminal performs a first operation, where the first operation includes at least one of the following: receiving first downlink information of a first auxiliary terminal sent by the network side device, and sending the first downlink information to the first auxiliary terminal, where the first auxiliary terminal is any auxiliary terminal among the Q terminals; Receive first uplink information sent by a second auxiliary terminal, and send the first uplink information to the network side device, where the second auxiliary terminal is any auxiliary terminal among the Q terminals.

5. The method according to claim 4, characterized in that The information of the auxiliary terminal meets at least one of the following conditions: The downlink information of the auxiliary terminal is sent by the network side device using the first security mechanism and by the main terminal using the second security mechanism; or, the downlink information of the auxiliary terminal is sent by the network side device using the third security mechanism; The uplink information of the auxiliary terminal is sent by the auxiliary terminal using the second security mechanism and by the main terminal using the first security mechanism; or, the uplink information of the auxiliary terminal is sent by the auxiliary terminal using the third security mechanism; Among them, the first security mechanism is the security mechanism between the network side device and the main terminal, the second security mechanism is the security mechanism between the main terminal and the auxiliary terminal; the third security mechanism is the security mechanism between the network side device and the auxiliary terminal.

6. The method according to claim 1, characterized in that After the master terminal establishes the first RRC connection with the network side device, the method further includes: The master terminal performs a second operation, where the second operation includes at least one of the following: receiving second downlink information of a fourth auxiliary terminal sent by the network side device, and sending the second downlink information to the fourth auxiliary terminal, where the fourth auxiliary terminal is any auxiliary terminal among the Q terminals; Receive second uplink information sent by a fifth auxiliary terminal, and send the second uplink information to the network side device, where the fifth auxiliary terminal is any auxiliary terminal among the Q terminals.

7. The method according to claim 6, characterized in that The information of the secondary terminal satisfies that: the packet data convergence protocol PDCP layer passed through is located at the secondary terminal, and the radio link control RLC layer passed through is located at the primary terminal.

8. A RRC connection maintenance method, characterized in that: include: The secondary terminal performs a third operation, where the third operation includes at least one of the following: In the case where an RRC connection is not established with a network side device, the information of the secondary terminal is transmitted between the secondary terminal and the network side device through the primary terminal; Establishing a second RRC connection with the network side device; The auxiliary terminal is any auxiliary terminal among Q terminals, the Q terminals support receiving data of the first service together, the Q terminals include the main terminal, and Q is an integer greater than 1; The Q terminals support jointly receiving data of the first service, including any of the following: The data of the first service received by the Q terminals have different bearers, wherein different data streams of the first service are transmitted respectively at different terminals; The data of the first service received by the Q terminals have the same bearer, wherein the data of the same bearer of the first service are divided and transmitted by different terminals. If the data received by the different terminals are different, the received data are sorted.

9. The method according to claim 8, characterized in that The information of the secondary terminal satisfies at least one of the following: The downlink information of the auxiliary terminal is sent by the network side device using the first security mechanism and by the main terminal using the second security mechanism; or, the downlink information of the auxiliary terminal is sent by the network side device using the third security mechanism; The uplink information of the auxiliary terminal is sent by the auxiliary terminal using the second security mechanism and by the main terminal using the first security mechanism; or, the uplink information of the auxiliary terminal is sent by the auxiliary terminal using the third security mechanism; Among them, the first security mechanism is the security mechanism between the network side device and the main terminal, the second security mechanism is the security mechanism between the main terminal and the auxiliary terminal; the third security mechanism is the security mechanism between the network side device and the auxiliary terminal.

10. The method according to claim 8, characterized in that The establishing a second RRC connection with the network side device includes: The secondary terminal receives the dedicated random access resource sent by the primary terminal; The secondary terminal uses the dedicated random access resource to establish a second RRC connection with the network side device.

11. The method according to claim 8, characterized in that After the secondary terminal establishes the second RRC connection with the network side device, the method further includes: The secondary terminal sends third information to the network side device, where the third information includes identification information of the primary terminal.

12. The method according to claim 8, characterized in that After the secondary terminal establishes the second RRC connection with the network side device, the method further includes: The secondary terminal performs a fourth operation, where the fourth operation includes at least one of the following: Transmitting information of the auxiliary terminal through a first interface, where the first interface is a communication interface between the auxiliary terminal and the network side device; The information of the auxiliary terminal is transferred between the auxiliary terminal and the network side device through a first target terminal, and the first target terminal is: the main terminal, or any other auxiliary terminal among the Q terminals.

13. The method according to claim 12, characterized in that In the case where the information of the auxiliary terminal is transferred through the first target terminal, the information of the auxiliary terminal satisfies: the PDCP layer passed through is located in the auxiliary terminal, and the RLC layer passed through is located in the first target terminal.

14. A RRC connection maintenance method, characterized in that: include: The network side device maintains P RRC connections, where the P RRC connections are located between the network side device and a second target terminal, where the second target terminal includes some or all of the Q terminals, where the Q terminals support jointly receiving data of the first service, where P is a positive integer, and Q is an integer greater than 1; When P is equal to 1, the RRC connection is between the network side device and a master terminal among the Q terminals; When P is equal to Q, the Q RRCs are respectively located between the network side device and the Q terminals; The Q terminals support jointly receiving data of the first service, including any of the following: The data of the first service received by the Q terminals have different bearers, wherein different data streams of the first service are transmitted respectively at different terminals; The data of the first service received by the Q terminals have the same bearer, wherein the data of the same bearer of the first service are divided and transmitted by different terminals. If the data received by the different terminals are different, the received data are sorted.

15. The method according to claim 14, characterized in that The network side device maintains P RRC connections, including: The network side device establishes an RRC connection with the master terminal; The network side device receives first information sent by the master terminal, where the first information indicates that the master terminal expects to receive data of the first service together with other terminals; The network side device establishes a first architecture according to the first information, where the first architecture includes the Q terminals.

16. The method according to claim 15, characterized in that The first information also includes relevant information of at least one auxiliary terminal, and the relevant information includes at least one of the following: identification information; authentication information; capability information; auxiliary information; The Q terminals include the at least one auxiliary terminal.

17. The method according to claim 14, characterized in that After the network side device maintains P RRC connections, the method further includes at least one of the following: The network side device sends the downlink information of the Q terminals to the master terminal; The network side device receives uplink information of the Q terminals sent by the master terminal.

18. The method according to claim 17, characterized in that The information of the secondary terminal among the Q terminals satisfies at least one of the following: The downlink information of the auxiliary terminal is sent by the network side device using the first security mechanism and by the main terminal using the second security mechanism; or, the downlink information of the auxiliary terminal is sent by the network side device using the third security mechanism; The uplink information of the auxiliary terminal is sent by the auxiliary terminal using the second security mechanism and by the main terminal using the first security mechanism; or, the uplink information of the auxiliary terminal is sent by the auxiliary terminal using the third security mechanism; Among them, the first security mechanism is the security mechanism between the network side device and the main terminal, the second security mechanism is the security mechanism between the main terminal and the auxiliary terminal; the third security mechanism is the security mechanism between the network side device and the auxiliary terminal.

19. The method according to claim 17, characterized in that The network side device maintains P RRC connections, including: The network side device establishes an RRC connection with the main terminal; The network-side device establishes Q-1 RRC connections with Q-1 terminals respectively, and at least one of the Q-1 RRC connections is established using dedicated random access resources; The network side device establishes a first architecture, which includes the master terminal and the Q-1 terminals.

20. The method according to claim 14, characterized in that After the network side device establishes an RRC connection with the master terminal, before the network side device establishes Q-1 RRC connections with Q-1 terminals respectively, the method further includes at least one of the following: The network side device receives first information sent by the master terminal, where the first information indicates that the master terminal expects to receive data of the first service together with other terminals; The network side device sends at least one dedicated random access resource to the master terminal.

21. The method according to claim 14, characterized in that The network side device maintains P RRC connections, including: The network side device establishes Q RRC connections with the Q terminals respectively; The network side device establishes a first architecture according to the received third information, where the first architecture includes the Q terminals; The third information is sent by a main terminal among the Q terminals, and the third information includes identification information of Q-1 auxiliary terminals among the Q terminals; or, the third information is sent by an auxiliary terminal among the Q terminals, and the third information sent by each auxiliary terminal includes identification information of the main terminal among the Q terminals.

22. The method according to claim 14, characterized in that After the network side device maintains P RRC connections, the method further includes: The network-side device performs a fifth operation, where the fifth operation includes at least one of the following: Transmitting information of the seventh auxiliary terminal through a first interface, where the first interface is a communication interface between the network-side device and the seventh auxiliary terminal, and the seventh auxiliary terminal includes at least one auxiliary terminal among the Q terminals; The information of the eighth auxiliary terminal is transmitted through the second interface, wherein the second interface is a communication interface between the network side device and the third target terminal, and the third target terminal is the main terminal among the Q terminals, or any auxiliary terminal among the Q terminals except the eighth auxiliary terminal; the eighth auxiliary terminal includes at least one auxiliary terminal among the Q terminals.

23. The method according to claim 22, characterized in that The information of the eighth auxiliary terminal satisfies: the passed PDCP layer is located at the eighth auxiliary terminal, and the passed RLC layer is located at the second target terminal.

24. An RRC connection maintenance device, applied to a master terminal, characterized in that: include: A first establishing module, used to establish a first RRC connection with a network side device; The master terminal is a terminal among the Q terminals, the master terminal supports transmission of information of some or all of the Q terminals, the Q terminals support common reception of data of the first service, and Q is an integer greater than 1; Among the Q terminals, only the master terminal establishes an RRC connection with the network side device; The RRC connection maintenance device also includes: A first sending module, configured to send first information to the network side device, wherein the first information indicates that the master terminal expects to receive data of the first service together with other terminals; or, The Q terminals respectively establish RRC connections with the network side device; The RRC connection maintenance device also includes: The second execution module is used for: Sending first information to the network side device, where the first information indicates that the master terminal expects to receive data of the first service together with other terminals; The Q terminals support jointly receiving data of the first service, including any of the following: The data of the first service received by the Q terminals have different bearers, wherein different data streams of the first service are transmitted respectively at different terminals; The data of the first service received by the Q terminals have the same bearer, wherein the data of the same bearer of the first service are divided and transmitted by different terminals. If the data received by the different terminals are different, the received data are sorted.

25. The RRC connection maintenance device according to claim 24, characterized in that: The RRC connection maintenance device also includes: The second sending module is used to send second information to the network side device, where the second information includes identification information of Q-1 auxiliary terminals among the Q terminals.

26. An RRC connection maintenance device, applied to a secondary terminal, characterized in that: include: The fourth execution module is configured to execute a third operation, where the third operation includes at least one of the following: In the case where an RRC connection is not established with a network side device, the information of the secondary terminal is transmitted between the secondary terminal and the network side device through the primary terminal; Establishing a second RRC connection with the network side device; The auxiliary terminal is any auxiliary terminal among Q terminals, the Q terminals support receiving data of the first service together, the Q terminals include the main terminal, and Q is an integer greater than 1; The Q terminals support jointly receiving data of the first service, including any of the following: The data of the first service received by the Q terminals have different bearers, wherein different data streams of the first service are transmitted respectively at different terminals; The data of the first service received by the Q terminals have the same bearer, wherein the data of the same bearer of the first service are divided and transmitted by different terminals. If the data received by the different terminals are different, the received data are sorted.

27. The RRC connection maintenance device according to claim 26, characterized in that: The information of the secondary terminal satisfies at least one of the following: The downlink information of the auxiliary terminal is sent by the network side device using the first security mechanism and by the main terminal using the second security mechanism; or, the downlink information of the auxiliary terminal is sent by the network side device using the third security mechanism; The uplink information of the auxiliary terminal is sent by the auxiliary terminal using the second security mechanism and by the main terminal using the first security mechanism; or, the uplink information of the auxiliary terminal is sent by the auxiliary terminal using the third security mechanism; Among them, the first security mechanism is the security mechanism between the network side device and the main terminal, the second security mechanism is the security mechanism between the main terminal and the auxiliary terminal; the third security mechanism is the security mechanism between the network side device and the auxiliary terminal.

28. The RRC connection maintenance device according to claim 26, characterized in that: The RRC connection maintenance device also includes: A fifth execution module is configured to execute a fourth operation, where the fourth operation includes at least one of the following: Transmitting information of the auxiliary terminal through a first interface, where the first interface is a communication interface between the auxiliary terminal and the network side device; The information of the auxiliary terminal is transferred between the auxiliary terminal and the network side device through a first target terminal, and the first target terminal is: the main terminal, or any other auxiliary terminal among the Q terminals.

29. An RRC connection maintenance device, applied to a network side device, characterized in that: include: a maintenance module, configured to maintain P RRC connections, wherein the P RRC connections are located between the network side device and a second target terminal, wherein the second target terminal includes some or all of the Q terminals, and the Q terminals support jointly receiving data of the first service, where P is a positive integer and Q is an integer greater than 1; When P is equal to 1, the RRC connection is between the network side device and a master terminal among the Q terminals; When P is equal to Q, the Q RRCs are respectively located between the network side device and the Q terminals; The Q terminals support jointly receiving data of the first service, including any of the following: The data of the first service received by the Q terminals have different bearers, wherein different data streams of the first service are transmitted respectively at different terminals; The data of the first service received by the Q terminals have the same bearer, wherein the data of the same bearer of the first service are divided and transmitted by different terminals. If the data received by the different terminals are different, the received data are sorted.

30. A communication device, characterized in that: It includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein when the program or instruction is executed by the processor, the steps of the RRC connection maintenance method as described in any one of claims 1 to 7 are implemented; or, the steps of the RRC connection maintenance method as described in any one of claims 8 to 13 are implemented; or, the steps of the RRC connection maintenance method as described in any one of claims 14 to 23 are implemented.

31. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, it implements the steps of the RRC connection maintenance method as described in any one of claims 1 to 7; or, implements the steps of the RRC connection maintenance method as described in any one of claims 8 to 13; or, implements the steps of the RRC connection maintenance method as described in any one of claims 14 to 23.

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