CN115334597A

CN115334597A - RRC message transmission method and device, terminal and readable storage medium

Info

Publication number: CN115334597A
Application number: CN202110507641.6A
Authority: CN
Inventors: 文鸣
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-11-11
Also published as: WO2022237619A1

Abstract

The application discloses a method and a device for transmitting an RRC message, a terminal and a readable storage medium, which belong to the technical field of communication, and the method for transmitting the RRC message comprises the following steps: under the condition that a first wireless access and backhaul integrated IAB node determines that a preset condition is met, the first IAB node switches a transmission path for transmitting the RRC message from a first transmission path to a second transmission path; wherein the first transmission path is a default transmission path; the first IAB node transmits the RRC message to a second IAB node over the second transmission path. Through the application, the problem that only the RRC message can be transmitted through the MCG in a default mode in the prior art is solved.

Description

RRC message transmission method and device, terminal and readable storage medium

Technical Field

The present application belongs to the field of communication technologies, and in particular, to a method and an apparatus for transmitting an RRC message, a terminal, and a readable storage medium.

Background

For a split Signaling Radio Bearer (SRB), the current protocol only supports that a primary Path is set as a Master Cell Group (MCG) by default, that is, all Radio Resource Control (RRC) messages that need to be sent through the split SRB are sent through the MCG by default, which results in that the terminal cannot autonomously switch a Path for transmitting RRC messages.

Disclosure of Invention

Embodiments of the present application provide a method and an apparatus for transmitting an RRC message, a terminal, and a readable storage medium, which can solve the problem in the prior art that an RRC message can only be transmitted by default through an MCG.

In a first aspect, a method for transmitting an RRC message is provided, including: under the condition that a first wireless access and backhaul integrated IAB node determines that a preset condition is met, the first IAB node switches a transmission path for transmitting the RRC message from a first transmission path to a second transmission path; wherein the first transmission path is a default transmission path; the first IAB node transmits the RRC message to a second IAB node over the second transmission path.

In a second aspect, a method for transmitting a radio resource control RRC message is provided, including: the second IAB node receives the RRC message transmitted by the first IAB node; under the condition that the second IAB node determines that a preset condition is met, the second IAB node switches a transmission path for transmitting the RRC message from a third transmission path to a fourth transmission path; wherein the third transmission path is a default transmission path; the second IAB node transmits the RRC message over the fourth transmission path.

In a third aspect, an apparatus for transmitting an RRC message is provided, where the apparatus is applied to a first IAB node, and includes: the first switching module is used for switching a transmission path for transmitting the RRC message from a first transmission path to a second transmission path under the condition that the preset condition is met; wherein the first transmission path is a default transmission path; a first transmission module, configured to transmit the RRC message to a second IAB node through the second transmission path.

In a fourth aspect, an apparatus for transmitting a radio resource control RRC message is provided, where the apparatus is applied to a second IAB node, and includes: a receiving module, configured to receive an RRC message transmitted by a first IAB node; the second switching module is used for switching the transmission path for transmitting the RRC message from the third transmission path to a fourth transmission path by the node under the condition that the preset condition is determined to be met; wherein the third transmission path is a default transmission path; a second transmission module, configured to transmit the RRC message through the fourth transmission path.

In a fifth aspect, there is provided a terminal comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method according to the first aspect or implementing the steps of the method according to the second aspect.

In a sixth aspect, a terminal is provided, which includes a processor and a communication interface, where the processor is configured to switch a transmission path for transmitting the RRC message from a first transmission path to a second transmission path if it is determined that a preset condition is satisfied, and the communication interface is configured to transmit the RRC message to a second IAB node through the second transmission path.

In a seventh aspect, a readable storage medium is provided, on which a program or instructions are stored, which when executed by a processor, implement the steps of the method according to the first aspect.

In an eighth aspect, a chip is provided, the chip comprising a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to execute a program or instructions to perform the method steps according to the first aspect or to perform the method steps according to the second aspect.

In a ninth aspect, there is provided a computer program/program product stored on a non-volatile storage medium, the program/program product being executable by at least one processor to perform the method steps as described in the first aspect or to perform the method steps as described in the second aspect.

In the embodiment of the present application, under the condition that the preset condition is met, the first IAB node switches the transmission path for transmitting the RRC message from the first transmission path to the second transmission path, and then transmits the RRC message to the second IAB node through the second transmission path, so that switching from the default transmission path to another path can be achieved, and if the first transmission path is MCG, the second transmission path is SCG, switching from MCG to SCG can be achieved, thereby solving the problem that in the prior art, the RRC message can only be transmitted by default through MCG.

Drawings

FIG. 1 is a block diagram of a wireless communication system to which embodiments of the application are applicable;

FIG. 2 is a diagram illustrating a CP/UP separation scenario with separate transmission according to an embodiment of the present application;

FIG. 3 is a second schematic diagram of separate transmission in a CP/UP separation scene according to the embodiment of the present application;

FIG. 4 is a schematic structural diagram of an IAB system according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a CU-DU structure of an IAB system according to an embodiment of the present application;

fig. 6 is a flowchart of a method for transmitting an RRC message according to an embodiment of the present application;

fig. 7 is a second flowchart of a method for transmitting an RRC message according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of an apparatus for transmitting an RRC message according to an embodiment of the present application;

fig. 9 is a second schematic structural diagram of an apparatus for transmitting RRC messages according to the embodiment of the present application;

fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a terminal according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below clearly with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of protection of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in other sequences than those illustrated or otherwise described herein, and that the terms "first" and "second" are generally used herein in a generic sense to distinguish one element from another, and not necessarily from another element, such as a first element which may be one or more than one. In addition, "and/or" in the specification and the claims means at least one of connected objects, and a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, but may 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 techniques can be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for purposes of example, and NR terminology is used in much of the description below, but the techniques may also be applied to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network-side device 12. Wherein, the terminal 11 may also be called as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, a super-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), a Wearable Device (Wearable Device) or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and other terminal side devices, the Wearable Device includes: smart watches, bracelets, earphones, glasses, and the like. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network, where the Base Station may be referred to as a node B, an evolved node B, an access Point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a WLAN access Point, a WiFi node, a Transmit Receiving Point (TRP), or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and 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 a specific type of the Base Station is not limited.

Furthermore, the related terms in the embodiments of the present application are explained

1. Delivery of SRBs

As shown in fig. 2, in a scenario 1 of CP/UP separation, SRB2 transfers data related to F1-C (F1 control plane) between an Integrated Access and Backhaul (IAB) separation Unit (DU) and an IAB-Node-CU (IAB host central Unit), that is, between the IAB-Node2 and a Secondary Node (Secondary Node, SN), that is, an IAB-Node-CU, the F1-C data between the IAB-Node2 and the primary Node (MN), that is, a gNB, is transmitted to an air interface (Uu), and then the MgNB interacts with the SN through an Xn interface, and transfers the F1-C data to the SN.

As shown in fig. 3, in scenario 2, the split SRB2 is used for transfer; the CP/UP separation describes a scene that F1-C (F1 control plane)/F1-U (F1 user plane) between an IAB-node and an IAB-node-CU are separately transmitted through different nodes, namely F1-C data between an IAB-node2 and an MN node are transmitted through an air interface (Uu), and then an SN (gNB) interacts with the MN node through an Xn interface to transmit F1-C traffic to the MN; and the F1-Utraffic between the IAB-node2 and the MN node is transmitted through a Back Haul (BH) Radio Link Control (RLC) channel in the IAB topology network.

2. IAB system

As shown in fig. 4, an IAB node includes a DU function portion and a Mobile Termination (MT) function portion. By means of the MT, an access point (i.e., IAB node) can find an upstream access point (parent IAB node) and establish a wireless connection with the DU of the upstream access point, which is called backhaul link. After an IAB node establishes a complete backhaul link, the IAB node opens its DU function, and the DU provides a cell service, that is, the DU can provide an access service for a User Equipment (UE). A self-backhauled loop comprises a donor IAB node (or IAB donor) having a wired transport network directly connected to it.

Fig. 5 is a schematic diagram of a CU-DU (Centralized Unit-Distributed Unit) structure of an IAB system, as shown in fig. 5, in a self-backhaul loop, all the DUs of IAB nodes are connected to one CU node, and the DU is configured by the one CU node through F1-AP protocol. The CU configures the MT through an RRC protocol. The Donor IAB node has no MT functionality.

The introduction of the IAB system is to solve the problem that the wired transmission network is not deployed in place when access points are densely deployed. I.e. the access point may rely on a wireless backhaul in the absence of a wired transmission network.

A wireless link between IAB nodes is called a Backhaul link (Backhaul link), and BH link is configured with BH RLC information for wireless Backhaul.

3. Split SRB

When a Packet Data Convergence Protocol (PDCP) entity associates 2 or more RLC entities, a primary RLC entity is defined to perform default transmission of Data; when the total amount of DRB data to be transmitted is less than ul-DataSplitThreshold, a primary Path is selected for data transmission, and if the total amount is greater than or equal to the threshold, any one associated RLC entity may be selected for data transmission.

For split SRB, however, current protocols only support setting primary Path to MCG by default. And the corresponding ul-DataSplitThreshold does not need to be configured for the SRB, that is, all RRC messages that need to be sent through the split SRB are sent through the MCG by default, and only in case of configuring PDCP duplicate, the RRC message is sent through the MCG and the Secondary Cell Group (SCG) once.

The RRC message transmission method provided by the embodiments of the present application is described in detail below with reference to the accompanying drawings through some embodiments and application scenarios thereof.

As shown in fig. 6, an embodiment of the present application provides a method for transmitting an RRC message, where the method includes:

step 602, when the first IAB node determines that the preset condition is met, the first IAB node switches the transmission path for transmitting the RRC message from the first transmission path to the second transmission path; wherein, the first transmission path is a default transmission path;

in step 604, the first IAB node transmits an RRC message to the second IAB node via the second transmission path.

Through the

above steps

602 and 604, when the preset condition is satisfied, the first IAB node switches the transmission path for transmitting the RRC message from the first transmission path to the second transmission path, and further transmits the RRC message to the second IAB node through the second transmission path, so that switching from the default transmission path to another path can be realized, and if the first transmission path is MCG, the second transmission path is SCG, so that switching from MCG to SCG can be realized, and the problem that in the prior art, the RRC message can only be transmitted by default through MCG is solved.

In an alternative implementation manner of the embodiment of the present application, the first IAB node in the embodiment of the present application may further refer to an IAB-MT.

It should be noted that the preset condition of the embodiment of the present application may include at least one of the following:

1) The Signaling Radio Bearer (SRB) is configured to separate Split SRBs, wherein the SRBs are used for transmitting RRC messages;

2) The SRB is not configured with a PDCP repeat function;

3) The default transmission path configured by the SRB corresponds to the master cell group MCG;

4) The MCG link experiences radio link failure, RLF.

It can be seen that, when the preset condition is satisfied, for example, the SRB does not configure the PDCP duplicate function, the terminal may also perform the handover of the transmission path, so as to implement the handover of the transmission path and avoid that the RRC message can only be transmitted through the default transmission path.

In embodiments of the present application, the Split SRB may include at least one of: split SRB1 and Split SRB2. It should be noted that SRB refers to SRB between MN (master node) and UE having RLC bearer in MCG and SCG. Wherein SRB1 is used to transport RRC messages (possibly including accompanying NAS messages) and NAS messages before SRB2 is established, and the transport procedure all uses DCCH logical channels. SRB2 is used to transmit NAS messages and RRC messages including measurement information for minimization of drive test and information related to IAB-DU specific F1-C, and the transmission process uses DCCH logical channel in its entirety.

In the embodiment of the present application, the RRC message in the embodiment of the present application includes information related to the F1 control planes F1-C, for example, the RRC message may be ul information transfer (uplink information transfer), where the information, such as dedicatedinnffo F1C, that is, the F1-C related information is carried.

Further, the information related to the F1-C includes F1AP information and IP packet information related to the F1-C; wherein the F1AP information is encapsulated in at least one of: stream Control Transmission Protocol (SCTP) packets, and internet Protocol IP packets. In addition, the IP data packets related to the F1-C are data packets with SCTP encapsulation, or the IP data packets related to the F1-C are data packets without SCTP encapsulation.

In the embodiment of the present application, taking an RRC message as an example of a ULInformationTransfer message, the contents of the ULInformationTransfer message in the embodiment of the present application are set as follows:

1) If F1-C related information needs to be transmitted (only applicable to IAB-MT), adding dedicatedinfo F1C information in ULInformationTransfer;

2) If SRB2 is configured as a detached SRB, and no PDCP-Duplication is configured, and the ULInformationTransfer message includes dedicatedInfo F1c, and the primaryPath of the PDCP entity of SRB2 points to the MCG, the primaryPath is set to point to the SCG.

3) The ULInformationTransfer message is submitted to the lower layer for transmission.

It should be noted that the above is to explain the transmission method of the RRC message in the embodiment of the present application from the first IAB node side, and the transmission method of the RRC message in the embodiment of the present application from the second IAB node side is explained below.

As shown in fig. 7, a method for transmitting an RRC message is provided, and includes the steps of:

step 702, the second IAB node receives the RRC message transmitted by the first IAB node;

step 704, under the condition that the second IAB node determines that the preset condition is met, the second IAB node switches the transmission path for transmitting the RRC message from the third transmission path to the fourth transmission path; wherein the third transmission path is a default transmission path;

in step 706, the second IAB node transmits the RRC message through the fourth transmission path.

Through the above steps 702 to 706, after the second IAB node receives the RRC message, and when the preset condition is satisfied, the second IAB node switches the transmission path for transmitting the RRC message from the third transmission path to the fourth transmission path, and then transmits the RRC message through the fourth transmission path, so that switching from the default transmission path to another path can be achieved, and if the third transmission path is MCG, the fourth transmission path is SCG, so that switching from MCG to SCG can be achieved, and a problem that in the prior art, only the RRC message can be transmitted through MCG by default is solved.

Optionally, the preset condition in the embodiment of the present application includes at least one of the following:

2) The SRB is not configured with a PDCP repeat function;

4) The MCG link experiences radio link failure, RLF.

Therefore, when the preset condition is met, for example, the SRB does not configure the PDCP repetition function, the terminal may also perform the handover of the transmission path, so that the handover of the transmission path may be implemented, and it is avoided that the RRC message can only be transmitted through the default transmission path.

It should be noted that the second IAB node in the embodiment of the present application is preferably a CU node.

It should be noted that, in the method for transmitting an RRC message provided in the embodiment of the present application, the execution subject may be a transmission apparatus for an RRC message, or a control module in the transmission apparatus for an RRC message, configured to execute the transmission method for an RRC message. In the embodiment of the present application, a method for performing transmission of an RRC message by using a transmission apparatus of an RRC message is taken as an example, and the transmission apparatus of an RRC message provided in the embodiment of the present application is described.

As shown in fig. 8, an embodiment of the present application provides an apparatus for transmitting an RRC message, where the apparatus is applied to a first IAB node, and the apparatus includes:

a first switching module 82, configured to switch a transmission path for transmitting the RRC message from a first transmission path to a second transmission path if it is determined that the preset condition is met; wherein, the first transmission path is a default transmission path;

a first transmission module 84, configured to transmit the RRC message to the second IAB node through the second transmission path.

Through the device in the embodiment of the application, under the condition that the preset condition is met, the transmission path for transmitting the RRC message is switched from the first transmission path to the second transmission path, and then the RRC message is transmitted through the second transmission path, so that switching from the default transmission path to other paths can be realized, if the first transmission path is MCG, the second transmission path is SCG, switching from MCG to SCG can be realized, and the problem that the RRC message can only be transmitted through MCG by default in the prior art is solved.

Optionally, the preset condition in the implementation of the present application may include at least one of the following:

2) SRB does not configure packet data convergence protocol PDCP repeat function;

4) The MCG link experiences radio link failure, RLF.

Optionally, the Split SRB in the embodiment of the present application includes at least one of the following: split SRB1 and Split SRB2.

Optionally, the RRC message in the embodiment of the present application includes information related to the F1 control plane F1-C.

Optionally, the information related to F1-C includes F1 application protocol F1AP information and IP packet information related to F1-C. Wherein the F1AP information is encapsulated in at least one of: stream control transmission protocol SCTP data packet and internet interconnection protocol IP data packet. The IP data packet related to the F1-C is a data packet with SCTP encapsulation, or the IP data packet related to the F1-C is a data packet without SCTP encapsulation.

It should be noted that the above is to explain the transmission method of the RRC message in the embodiment of the present application from the apparatus applied to the first IAB node side, and the following is to explain the transmission method of the RRC message in the embodiment of the present application from the apparatus applied to the second IAB node side.

As shown in fig. 9, there is provided an apparatus for transmitting an RRC message, which is applied to a second IAB node, the apparatus including:

a receiving module 92, configured to receive an RRC message transmitted by the first IAB node;

a second switching module 94, configured to, if it is determined that the preset condition is met, switch, by the node, the transmission path through which the RRC message is transmitted from the third transmission path to a fourth transmission path; wherein the third transmission path is a default transmission path;

a second transmission module 96, configured to transmit the RRC message through the fourth transmission path.

Through the device of the embodiment of the application, after the RRC message is received, and under the condition that the preset condition is met, the transmission path for transmitting the RRC message can be switched from the third transmission path to the fourth transmission path, and then the RRC message is transmitted through the fourth transmission path, so that switching from the default transmission path to other paths can be realized, if the third transmission path is MCG, the fourth transmission path is SCG, and therefore switching from MCG to SCG can be realized, and the problem that in the prior art, the RRC message can only be transmitted through MCG by default is solved.

the Signaling Radio Bearer (SRB) is configured to separate Split SRBs, wherein the SRBs are used for transmitting RRC messages;

SRB does not configure packet data convergence protocol PDCP repeat function;

the default transmission path configured by the SRB corresponds to the master cell group MCG;

the MCG link experiences radio link failure RLF.

The apparatus for transmitting the RRC message in the embodiment of the present application may be an apparatus, an apparatus or an electronic device having an operating system, or a component, an integrated circuit, or a chip in a terminal. The device or the electronic equipment can be a mobile terminal or a non-mobile terminal. For example, the mobile terminal may include, but is not limited to, the above-listed type of terminal 11, and the non-mobile terminal may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine, a kiosk, or the like, and the embodiments of the present application are not limited in particular.

The transmission apparatus for RRC message provided in this embodiment of the present application can implement each process implemented by the method embodiments of fig. 6 and fig. 7, and achieve the same technical effect, and is not described herein again to avoid repetition.

Optionally, as shown in fig. 10, an embodiment of the present application further provides a communication device 1000, which includes a processor 1001, a memory 1002, and a program or an instruction stored in the memory 1002 and executable on the processor 1001, for example, when the communication device 1000 is a terminal, the program or the instruction is executed by the processor 1001 to implement the processes of the foregoing RRC message transmission method embodiment, and the same technical effect can be achieved. When the communication device 1000 is a network device, the program or the instruction is executed by the processor 1001 to implement the processes of the foregoing RRC message transmission method embodiment, and the same technical effect can be achieved.

The embodiment of the present application further provides a terminal, which includes a processor and a communication interface, where the processor is configured to switch a transmission path for transmitting the RRC message from a first transmission path to a second transmission path when it is determined that a preset condition is met; wherein the first transmission path is a default transmission path; the communication interface is configured to transmit the RRC message to a second IAB node via the second transmission path. The terminal embodiment corresponds to the terminal-side method embodiment, and all implementation processes and implementation manners of the method embodiment can be applied to the terminal embodiment and can achieve the same technical effect. Specifically, fig. 11 is a schematic diagram of a hardware structure of a terminal for implementing the embodiment of the present application.

The terminal 1100 includes, but is not limited to: radio frequency unit 1101, network module 1102, audio output unit 1103, input unit 1104, sensor 1105, display unit 1106, user input unit 1107, interface unit 1108, memory 1109, and processor 1110, among other components.

Those skilled in the art will appreciate that terminal 1100 can also include a power supply (e.g., a battery) for powering the various components, which can be logically coupled to processor 1110 via a power management system to facilitate managing charging, discharging, and power consumption via the power management system. The terminal structure shown in fig. 11 does not constitute a limitation of the terminal, and the terminal may include more or less components than those shown, or combine some components, or have a different arrangement of components, and thus will not be described again.

It should be understood that, in the embodiment of the present application, the input Unit 1104 may include a Graphics Processing Unit (GPU) 11041 and a microphone 11042, and the Graphics processor 11041 processes image data of still pictures or video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 1106 may include a display panel 11061, and the display panel 11061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1107 includes a touch panel 11071 and other input devices 11072. A touch panel 11071, also called a touch screen. The touch panel 11071 may include two portions of a touch detection device and a touch controller. Other input devices 11072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

In this embodiment, the radio frequency unit 1101 receives downlink data from a network device and processes the downlink data to the processor 1110; in addition, the uplink data is sent to the network side equipment. In general, radio frequency unit 1101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 1109 may be used for storing software programs or instructions as well as various data. The memory 1109 may mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area may store an operating system, application programs or instructions required for at least one function (such as a sound playing function, an image playing function, etc.), and the like. In addition, the Memory 1109 may include a high-speed random access Memory and may also include a nonvolatile Memory, which may be a Read-Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), or a flash Memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.

Processor 1110 may include one or more processing units; alternatively, processor 1110 may integrate an application processor that primarily handles operating systems, user interfaces, and applications or instructions, etc. and a modem processor that primarily handles wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into processor 1110.

The processor 1110 is configured to switch a transmission path for transmitting the RRC message from a first transmission path to a second transmission path when it is determined that a preset condition is met; wherein the first transmission path is a default transmission path;

a radio unit 1101, configured to transmit the RRC message to a second IAB node through the second transmission path;

through the terminal in the embodiment of the application, under the condition that the preset condition is met, the transmission path for transmitting the RRC message is switched from the first transmission path to the second transmission path, and then the RRC message is transmitted to the second IAB node through the second transmission path, so that switching from a default transmission path to other paths can be realized, if the first transmission path is MCG, the second transmission path is SCG, switching from the MCG to the SCG can be realized, and the problem that the RRC message can only be transmitted through the MCG by default in the prior art is solved.

An embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the foregoing RRC message transmission method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

Wherein, 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 Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.

The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement each process of the foregoing RRC message transmission method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions recited, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method for transmitting a Radio Resource Control (RRC) message, comprising:

under the condition that a first wireless access and backhaul integrated IAB node determines that a preset condition is met, the first IAB node switches a transmission path for transmitting the RRC message from a first transmission path to a second transmission path; wherein the first transmission path is a default transmission path;

and the first IAB node transmits the RRC message to a second IAB node through the second transmission path.

2. The method of claim 1, wherein the preset condition comprises at least one of:

a Signaling Radio Bearer (SRB) is configured to separate Split SRBs, wherein the SRBs are used for transmitting the RRC message;

the SRB is not configured with a Packet Data Convergence Protocol (PDCP) repeat function;

the default transmission path configured by the SRB corresponds to a master cell group MCG;

and the MCG link has Radio Link Failure (RLF).

3. The method of claim 2, wherein the Split SRB comprises at least one of: split SRB1 and Split SRB2.

4. The method of claim 1, wherein the RRC message comprises information related to F1 control plane F1-C.

5. The method of claim 4,

the information related to the F1-C comprises F1AP information and IP data packet information related to the F1-C;

the F1AP information is encapsulated in at least one of: stream control transmission protocol SCTP data packet and internet interconnection protocol IP data packet;

the IP data packet related to the F1-C is a data packet with SCTP encapsulation, or the IP data packet related to the F1-C is a data packet without SCTP encapsulation.

6. A method for transmitting a Radio Resource Control (RRC) message, comprising:

the second IAB node receives the RRC message transmitted by the first IAB node;

under the condition that the second IAB node determines that a preset condition is met, the second IAB node switches a transmission path for transmitting the RRC message from a third transmission path to a fourth transmission path; wherein the third transmission path is a default transmission path;

the second IAB node transmits the RRC message over the fourth transmission path.

7. The method of claim 6, wherein the preset condition comprises at least one of:

the Signaling Radio Bearer (SRB) is configured to separate Split SRBs, wherein the SRBs are used for transmitting the RRC message;

the default transmission path configured by the SRB corresponds to a Master Cell Group (MCG);

the MCG link exhibits radio link failure, RLF.

8. An apparatus for transmitting RRC message, applied to a first IAB node, comprising:

the first switching module is used for switching the transmission path for transmitting the RRC message from the first transmission path to the second transmission path under the condition that the preset condition is determined to be met; wherein the first transmission path is a default transmission path;

a second transmission module, configured to transmit the RRC message to a second IAB node through the second transmission path.

9. The apparatus of claim 8, wherein the preset condition comprises at least one of:

the MCG link exhibits radio link failure, RLF.

10. The apparatus of claim 9, wherein the Split SRB comprises at least one of: split SRB1 and Split SRB2.

11. The apparatus of claim 8, wherein the RRC message includes information related to F1 control plane F1-C.

12. The apparatus of claim 11,

the information related to the F1-C comprises F1 application protocol F1AP information and IP data packet information related to the F1-C;

the F1AP information is encapsulated in at least one of: stream control transmission protocol SCTP data packets and internet interconnection protocol IP data packets;

13. An apparatus for transmitting a Radio Resource Control (RRC) message, applied to a second IAB node, comprising:

a receiving module, configured to receive an RRC message transmitted by a first IAB node;

the second switching module is used for switching the transmission path for transmitting the RRC message from the third transmission path to a fourth transmission path by the node under the condition that the preset condition is determined to be met; wherein the third transmission path is a default transmission path;

a second transmission module, configured to transmit the RRC message through the fourth transmission path.

14. The apparatus of claim 13, wherein the preset condition comprises at least one of:

the MCG link exhibits radio link failure, RLF.

15. A system for transmitting a radio resource control, RRC, message, comprising: the device of any one of claims 8 to 12, and the device of claim 13 or 14.

16. A terminal comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the method steps of any one of claims 1 to 5 or implementing the method steps of claim 6 or 7.

17. A readable storage medium, characterized in that a program or instructions are stored thereon, which program or instructions, when executed by a processor, carry out the method steps of any one of claims 1 to 5, or carry out the method steps of claim 6 or 7.