WO2022206367A1

WO2022206367A1 - Method and apparatus for switching carrier

Info

Publication number: WO2022206367A1
Application number: PCT/CN2022/080873
Authority: WO
Inventors: 毛颖超; 常俊仁; 酉春华; 谢曦; 范强
Original assignee: 华为技术有限公司
Priority date: 2021-04-02
Filing date: 2022-03-15
Publication date: 2022-10-06
Also published as: CN115175328A

Abstract

The present application provides a method and apparatus for switching a carrier. The method comprises: a terminal device sends first information to a network device, the first information comprising information of a reference signal of the terminal device, the first information being used for the network device to switch a first uplink carrier to a second uplink carrier, and the terminal device being in a non-connected state; and the terminal device receives downlink control information, the downlink control information carrying information about an uplink transmission resource, and the uplink transmission resource being on the second uplink carrier. The method provided in the present application enables the terminal device to implement carrier switching in the non-connected state, thereby ensuring the reliability and accuracy of uplink data transmission.

Description

A method and apparatus for switching carriers

This application claims the priority of the Chinese patent application with the application number 202110363533.6 and the application title "A method and device for switching carrier waves", which was filed with the China Patent Office on April 2, 2021, the entire contents of which are incorporated into this application by reference middle.

technical field

The present application relates to the field of communications, and, more particularly, to a method and apparatus for switching carriers.

Background technique

Currently, when a user equipment (UE) performs small data transmission (SDT) in the radio resource control (RRC) disconnected state, after the UE triggers SDT, all uplink transmissions are reserved On the selected carrier, switching between a supplementary/supplementary uplink (SUL) carrier and a normal/normal uplink (NUL) carrier is not allowed during transmission. However, due to subsequent data transmission in the SDT process, when the channel environment and other factors of subsequent transmission change, if the UE that should transmit on the NUL carrier is still transmitting on the SUL carrier, the SUL carrier may be overloaded, or if When the transmission conditions of the UE transmitting on the NUL carrier change and the transmission conditions of the NUL carrier are not satisfied, the UE may not be able to continue to transmit subsequent data on the NUL carrier. Therefore, how to implement carrier switching in a disconnected state is an urgent problem to be solved.

SUMMARY OF THE INVENTION

The present application provides a method and apparatus for switching carriers, so that a terminal device can implement carrier switching in a disconnected state, thereby ensuring the reliability and accuracy of uplink data transmission.

In a first aspect, a method for switching carriers is provided. The method may be executed by a terminal device, or may also be executed by a chip or circuit configured in the terminal device, which is not limited in this application. The method includes: a terminal device sends first information to a network device, where the first information is used by the network device to switch the first carrier to a second carrier, the first information includes information of a reference signal of the terminal device, the terminal The device is in a disconnected state; the terminal device receives downlink control information, where the downlink control information carries information of uplink transmission resources, and the uplink transmission resources are on the second carrier.

Based on the above solution, when the terminal device needs to switch the uplink carrier in the disconnected state, the terminal device can report its reference signal information to the network device, so that the network device can switch the uplink carrier to the first information for the terminal device based on the first information. Two carriers, thus ensuring the reliability of subsequent data transmission.

With reference to the first aspect, in some implementations of the first aspect, the first information includes reference signal received power or reference signal received quality.

With reference to the first aspect, in some implementations of the first aspect, when the first information is greater than or equal to a first threshold and less than or equal to a second threshold, the terminal device sends the first information to the network device, and the first information is sent to the network device. A message for the network equipment to switch the normal uplink NUL carrier to the secondary uplink SUL carrier. Or, when the first information is greater than or equal to the third threshold and less than or equal to the fourth threshold, the terminal device sends the first information to the network device, where the first information is used by the network device to switch the assisted uplink SUL carrier into a normal uplink NUL carrier.

It should be understood that the first threshold, the second threshold, the third threshold and the fourth threshold may be configured by the network device to the terminal device through system information, or may be preset in the terminal device.

It should be understood that the "preset" may include predefined definitions, eg, protocol definitions. Wherein, "pre-definition" can be implemented by pre-saving corresponding codes, forms or other means that can be used to indicate relevant information in the device, and this application does not limit the specific implementation means.

With reference to the first aspect, in some implementations of the first aspect, the first information is carried in a medium access control information element MAC CE or a radio resource control RRC message.

With reference to the first aspect, in some implementations of the first aspect, when the quality of the serving cell is lower than a fifth threshold, the terminal device sends the first information to the network device.

Similarly, the fifth threshold may also be configured by the network device to the terminal device through system information, or preset in the terminal device.

With reference to the first aspect, in some implementations of the first aspect, the terminal device receives measurement reporting configuration information from the network device, where the measurement reporting configuration information includes the fifth threshold; the terminal device is in the disconnected state Measure the quality of the serving cell.

Based on the above solution, the threshold value of the measurement report triggering event, that is, the fifth threshold value, is configured for the terminal device through the measurement configuration information, so that when the service quality of the cell measured by the terminal device is less than the fifth threshold value, the event triggers the reporting of the measurement result, which enables the reporting of the measurement result. The process of the measurement result is more flexible, and at the same time, it helps the network device to effectively determine whether the terminal device is far from the coverage of the cell, so as to switch the carrier for the terminal device according to the reported measurement result.

With reference to the first aspect, in some implementations of the first aspect, the terminal device receives an RRC release message from the network device, where the RRC release message includes the measurement reporting configuration information.

The configuration information of the measurement report is configured for the terminal device through the RRC release message, which can effectively save resources.

In a second aspect, a method for switching carriers is provided. The method may be executed by a terminal device, or may also be executed by a chip or circuit configured in the terminal device, which is not limited in this application. The method includes: a terminal device sends a reference signal to a network device to make the network device switch a first carrier to a second carrier, and the terminal device is in a disconnected state; the terminal device receives downlink control information, where the downlink control information carries uplink transmission resources information, the uplink transmission resource is on the second carrier.

Based on the above solution, when the terminal device needs to switch the uplink carrier in the disconnected state, the terminal device reports the reference signal of the cell where it is located to the network device, and the network device switches the uplink carrier to the first terminal device based on the reference signal. Two carriers enable the terminal device to successfully transmit subsequent data.

With reference to the second aspect, in some implementations of the second aspect, when the first condition is established, the terminal device sends a reference signal to the network device, so that the network device switches the first carrier to the second carrier, wherein the first A condition includes at least one of the following: the reference signal received power of the reference signal is greater than or equal to a second threshold and less than or equal to a first threshold, or the terminal device sends data on the uplink transmission resource based on random access, the first threshold One condition is after the competition is successfully resolved.

Based on the above solution, the conditions for the terminal device to send the reference signal can be made more flexible and richer.

With reference to the second aspect, in some implementations of the second aspect, the terminal device receives configuration information from the network device, where the configuration information includes configuration information of the reference signal; the terminal device sends the network device according to the configuration information The reference signal enables the network device to switch the first carrier to the second carrier.

With reference to the second aspect, in some implementations of the second aspect, the terminal device sends a request message to the network device, where the request message is used to request the configuration information.

In a third aspect, a method for switching carriers is provided. The method may be executed by a terminal device, or may also be executed by a chip or circuit configured in the terminal device, which is not limited in this application. The method includes: the terminal device obtains the received power of the reference signal by measuring; the terminal device compares the received power of the reference signal with a preset threshold to switch the first uplink carrier to the second uplink carrier.

In the embodiment of the present application, the terminal device in the disconnected state automatically switches the carrier based on the measurement result, which ensures that the data in the small data transmission process can be successfully transmitted, and the accuracy of the uplink data transmission is ensured.

With reference to the third aspect, in some implementations of the third aspect, when the reference signal received power is greater than or equal to the threshold, the auxiliary uplink SUL carrier is switched to the normal uplink NUL carrier, or when the reference signal When the received signal power is less than the threshold, the normal uplink NUL carrier is switched to the auxiliary uplink SUL carrier.

With reference to the third aspect, in some implementations of the third aspect, the terminal device initiates uplink transmission on the second carrier, where the uplink transmission includes random access-based uplink transmission or configuration authorization-based uplink data transmission .

With reference to the third aspect, in some implementations of the third aspect, when the uplink transmission is based on random access, the terminal device sends a first message to the network device, where the first message includes the cell wireless network temporary identifier C- Medium access control information element and uplink data of RNTI.

Based on the above solution, the message carrying the uplink data may not include the RRC recovery request message, but only the C-RNTI MAC CE, which can avoid the recovery integrity message authentication code (message authentication code for integrity, resumeMAC-I) in the RRC recovery request message. ) is a security risk for reuse.

In a fourth aspect, a method for switching carriers is provided. The method may be performed by a network device, or may also be performed by a chip or circuit configured in the network device, which is not limited in this application. The method includes: a network device receives first information from a terminal device, the first information includes information of a reference signal of the terminal device, the first information is transmitted on a first carrier, and the terminal device is in a disconnected state; the network The device sends downlink control information to the terminal device, where the downlink control information carries information of uplink transmission resources, and the uplink transmission resources are on the second carrier.

With reference to the fourth aspect, in some implementations of the fourth aspect, the information of the reference signal includes reference signal received power or reference signal received quality.

With reference to the fourth aspect, in some implementations of the fourth aspect, the network device receives the first information from the terminal device, including: when the first information is greater than or equal to the first threshold and less than or equal to the second threshold, the The network device receives the first information from the terminal device, where the first carrier is a normal uplink NUL carrier, the second carrier is a supplementary uplink SUL carrier, or the first information is greater than or equal to a third threshold and When less than or equal to the fourth threshold, the network device receives the first information from the terminal device, where the first carrier is a supplementary uplink SUL carrier, and the second carrier is a normal uplink NUL carrier.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first information is carried in a medium access control information element MAC CE or a radio resource control RRC message.

With reference to the fourth aspect, in some implementations of the fourth aspect, when the quality of the serving cell is lower than the fifth threshold, the network device receives the first information from the terminal device.

With reference to the fourth aspect, in some implementations of the fourth aspect, the method further includes: the network device sends measurement reporting configuration information to the terminal device, where the measurement reporting configuration information includes the fifth threshold.

With reference to the fourth aspect, in some implementations of the fourth aspect, the network device sends an RRC release message to the terminal device, where the RRC release message includes the measurement reporting configuration information.

In a fifth aspect, a method for switching carriers is provided. The method may be performed by a network device, or may also be performed by a chip or circuit configured in the network device, which is not limited in this application. The method includes: a network device receives a reference signal from a terminal device, the reference signal includes a reference signal of a first carrier of the terminal device, and the terminal device is in a disconnected state; the network device measures the reference signal; the network device measures the reference signal according to the measurement As a result, the first carrier is switched to the second carrier; the network device sends downlink control information to the terminal device, where the downlink control information carries the information of the uplink transmission resource, and the uplink transmission resource is on the second carrier.

Based on the above solution, when the terminal device needs to switch the uplink carrier in the disconnected state, the terminal device reports the reference signal of the cell where it is located to the network device, and the network device performs measurement, and switches the uplink carrier for the terminal device based on the measurement result. to the second carrier, so that the terminal device can successfully transmit subsequent data.

With reference to the fifth aspect, in some implementations of the fifth aspect, the method further includes: when a first condition is established, the network device receives a reference signal from the terminal device, where the first condition includes at least one of the following : the reference signal received power of the reference signal is greater than or equal to the second threshold and less than or equal to the first threshold, or the terminal device sends data on the uplink transmission resource based on random access, and the first condition is that after the contention is successfully resolved .

With reference to the fifth aspect, in some implementations of the fifth aspect, the method further includes: the network device sends configuration information to the terminal device, where the configuration information includes configuration information of the reference signal.

With reference to the fifth aspect, in some implementations of the fifth aspect, the method further includes: the network device receiving a request message from the terminal device, where the request message is used to request the configuration information.

In a sixth aspect, a method for switching carriers is provided. The method may be performed by a network device, or may also be performed by a chip or circuit configured in the network device, which is not limited in this application. The method includes: the network device receives first information from the terminal device; the network device determines, based on the first information, that the terminal device switches the first carrier to the second carrier, and the terminal device is in a disconnected state.

In this embodiment of the present application, the terminal device in the disconnected state automatically switches the carrier based on the measurement result, and notifies the network to perform uplink carrier switching, which ensures that the data in the small data transmission process can be successfully transmitted, and ensures the transmission of uplink data. accuracy.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the method further includes: the network device sends downlink control information to the terminal device, where the downlink control information carries information of uplink transmission resources, and the uplink transmission resources are on the second carrier.

With reference to the sixth aspect, in some implementations of the sixth aspect, the uplink transmission resources include random access-based uplink transmission resources or configuration grant-based uplink transmission resources.

With reference to the sixth aspect, in some implementations of the sixth aspect, when based on random access, the network device receives a second message sent from the terminal device, and the second message includes the cell radio network temporary identifier C-RNTI. Medium access control cells and uplink data.

Based on the above solution, the message carrying the uplink data may not include the RRC recovery request message, but only the C-RNTI MAC CE, which can avoid the security risk of reusing the recovery integrity resumeMAC-I in the RRC recovery request message.

In a seventh aspect, an apparatus for switching carriers is provided, where the apparatus is configured to perform the methods provided in the above-mentioned first to third aspects. Specifically, the apparatus may include units and/or modules for performing the methods provided in the first to third aspects, such as a processing module and/or a transceiver module.

In an implementation manner, the apparatus is a terminal device. When the apparatus is a terminal device, the communication module may be a transceiver, or an input/output interface; the processing module may be a processor.

In another implementation manner, the apparatus is a chip, a chip system or a circuit used in a terminal device. When the device is a chip, chip system or circuit in a device for switching carrier waves, the transceiver module unit may be an input/output interface, interface circuit, output circuit, input circuit, tube on the chip, chip system or circuit The processing module can be a processor, a processing circuit or a logic circuit, etc.

Based on the beneficial effects of the above solutions, reference may be made to the corresponding descriptions of the first to third aspects. For the sake of brevity, details are not repeated here in this application.

Optionally, the above transceiver may be a transceiver circuit. Optionally, the above-mentioned input/output interface may be an input/output circuit.

In an eighth aspect, an apparatus for switching carriers is provided, and the apparatus is configured to perform the methods provided in the fourth to sixth aspects above. Specifically, the apparatus may include units and/or modules for performing the methods provided in the fourth to sixth aspects, such as a processing module and/or a transceiver module.

In one implementation, the apparatus is a network device. When the apparatus is a network device, the transceiver module may be a transceiver, or an input/output interface; the processing module may be a processor.

In another implementation, the apparatus is a chip, a system of chips, or a circuit used in a network device. When the device is a chip, chip system or circuit in a device for switching carrier waves, the transceiver module unit may be an input/output interface, interface circuit, output circuit, input circuit, tube on the chip, chip system or circuit The processing module can be a processor, a processing circuit or a logic circuit, etc.

Based on the beneficial effects of the above solutions, reference may be made to the corresponding descriptions of the fourth to sixth aspects. For the sake of brevity, details are not repeated here in this application.

In a ninth aspect, a communication device is provided, the device comprising: a memory for storing a program; a processor for executing a program stored in the memory, and when the program stored in the memory is executed, the processor is used for executing the above-mentioned first aspect to The method provided by the sixth aspect.

In an implementation manner, the apparatus is a terminal device or a network device.

In another implementation manner, the apparatus is a chip, a chip system or a circuit used in terminal equipment or network equipment.

In a tenth aspect, the present application provides a processor for executing the methods provided by the above aspects. In the process of executing these methods, the process of sending the above-mentioned information and obtaining/receiving the above-mentioned information in the above-mentioned methods can be understood as the process of outputting the above-mentioned information by the processor and the process of receiving the above-mentioned input information by the processor. When outputting the above-mentioned information, the processor outputs the above-mentioned information to the transceiver for transmission by the transceiver. After the above-mentioned information is output by the processor, other processing may be required before reaching the transceiver. Similarly, when the processor receives the above-mentioned information input, the transceiver acquires/receives the above-mentioned information, and inputs it into the processor. Furthermore, after the transceiver receives the above-mentioned information, the above-mentioned information may need to perform other processing before being input to the processor.

For the operations of transmitting, sending, and acquiring/receiving involved in the processor, if there is no special description, or if it does not contradict its actual function or internal logic in the relevant description, it can be understood as a processor in a more general sense. The operations of output and reception, input, etc., rather than the transmission, transmission and reception operations performed directly by radio frequency circuits and antennas.

In the implementation process, the above-mentioned processor may be a processor specially used to execute these methods, or may be a processor that executes computer instructions in a memory to execute these methods, such as a general-purpose processor. The above-mentioned memory can be a non-transitory (non-transitory) memory, such as a read-only memory (Read Only Memory, ROM), which can be integrated with the processor on the same chip, or can be set on different chips respectively. The embodiment does not limit the type of the memory and the setting manner of the memory and the processor.

In an eleventh aspect, a computer-readable storage medium is provided, where the computer-readable medium stores program codes for device execution, the program codes including methods for executing the above-mentioned first to sixth aspects.

A twelfth aspect provides a computer program product comprising instructions, which, when the computer program product runs on a computer, causes the computer to execute the methods provided in the first to sixth aspects above.

A thirteenth aspect provides a chip, the chip includes a processor and a communication interface, the processor reads an instruction stored in a memory through the communication interface, and executes the methods provided in the first to sixth aspects.

Optionally, as an implementation manner, the chip may further include a memory, the memory stores an instruction, the processor is used to execute the instruction stored on the memory, and when the instruction is executed, the processor is used to execute the above-mentioned No. The methods provided in one aspect to the sixth aspect.

Description of drawings

FIG. 1 shows a schematic diagram of a communication system 100 suitable for an embodiment of the present application.

FIG. 2 shows a schematic flow chart of small data transmission based on random access.

FIG. 3 shows a schematic flowchart of small data transmission based on preconfigured authorization.

FIG. 4 shows a schematic flowchart of a method for switching carriers provided by an embodiment of the present application.

FIG. 5 shows a schematic flowchart of another method for switching carriers provided by an embodiment of the present application.

FIG. 6 shows a schematic flowchart of another method for switching carriers provided by an embodiment of the present application.

FIG. 7 shows a schematic flowchart of another method for switching carriers provided by an embodiment of the present application.

FIG. 8 shows a schematic flowchart of another method for switching carriers provided by an embodiment of the present application.

FIG. 9 shows a schematic flowchart of another method for switching carriers provided by an embodiment of the present application.

FIG. 10 shows a schematic flowchart of another method for switching carriers provided by an embodiment of the present application.

FIG. 11 shows a schematic flowchart of another method for switching carriers provided by an embodiment of the present application.

FIG. 12 is a schematic block diagram of an example of a terminal device of the present application.

FIG. 13 is a schematic block diagram of an example of a network device of the present application.

FIG. 14 is a schematic diagram of an apparatus for switching carriers provided by an embodiment of the present application.

FIG. 15 is a schematic diagram of still another example of an apparatus for switching carriers provided by an embodiment of the present application.

FIG. 16 is a schematic structural diagram of a terminal device of the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE Time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, the future fifth generation (5th generation, 5G) system or new radio (NR), etc.

The terminal device in this embodiment of the present application may refer to a user equipment (user equipment, UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless Communication equipment, user agent or user equipment. The terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or future evolved public land mobile networks (PLMN) A terminal device, etc., is not limited in this embodiment of the present application.

Among them, wearable devices can also be called wearable smart devices, which is a general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart jewelry, etc. for physical sign monitoring.

In addition, the terminal device may also be a terminal device in an internet of things (Internet of things, IoT) system. IoT is an important part of the development of information technology in the future. Its main technical feature is to connect items to the network through communication technology, so as to realize the intelligent network of human-machine interconnection and interconnection of things. This application does not limit the specific form of the terminal device.

It should be understood that, in this embodiment of the present application, the terminal device may be a device for implementing the function of the terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system, and the device may be installed in the terminal. In this embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

The network device in this embodiment of the present application may be a device for communicating with a terminal device, and the network device may be a global system of mobile communication (GSM) system or a code division multiple access (code division multiple access, CDMA) The base station (base transceiver station, BTS) in the LTE system can also be the base station (NodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolutionary base station (evolutional base station) in the LTE system NodeB, eNB or eNodeB), it can also be a wireless controller in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, an access point, an in-vehicle device, a wearable device, and future The network equipment in the 5G network or the network equipment in the future evolved PLMN network, etc., are not limited in the embodiments of the present application.

In some deployments, a gNB may include a centralized unit (CU) and a DU. The gNB may also include an active antenna unit (active antenna unit, AAU for short). The CU implements some functions of the gNB, and the DU implements some functions of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implementing functions of radio resource control (RRC) and packet data convergence protocol (PDCP) layers. The DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, the media access control (MAC) layer and the physical (PHY) layer. AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, therefore, in this architecture, the higher-layer signaling, such as the RRC layer signaling, can also be considered to be sent by the DU. , or, sent by DU+AAU. It can be understood that the network device may be a device including one or more of a CU node, a DU node, and an AAU node. In addition, the CU can be divided into network devices in an access network (radio access network, RAN), and the CU can also be divided into network devices in a core network (core network, CN), which is not limited in this application.

It should be understood that, in this embodiment of the present application, the network device may be an apparatus for implementing the function of the network device, or may be an apparatus capable of supporting the network device to implement the function, such as a chip system, and the apparatus may be installed in the network device.

FIG. 1 is a schematic diagram of a communication system 100 suitable for an embodiment of the present application.

As shown in FIG. 1 , the communication system 100 may include a network device 120 , for example, the network device shown in FIG. 1 . The communication system 100 may also include at least one terminal device 110, such as the terminal device shown in FIG. 1 . A connection can be established between the terminal device and the network device for communication.

This application relates to small data transmission (SDT), which refers to a transmission mode for transmitting small data packets. SDT technology is the data transmission of terminal equipment in the inactive state (INACTIVE) of radio resource control (RRC). technology.

Small data packets can also be for a certain business. Wherein, the business may be the following application scenarios, for example, all data for a smart meter can be understood as small data. For the quality of service (QoS) requirements of a service, the service corresponds to a data radio bearer (DRB), and the data on the DRB can be understood as a small data packet.

Application scenarios for small data transfer, that is, use scenarios involving small and infrequent data traffic. For example, it can be: smartphone applications, including traffic of instant messaging services, such as whatsapp, QQ, WeChat, etc., heartbeat packet traffic from IM/e-mail clients and other applications (applications, APPs) (such as Heart- beat/keep-alive traffic), and push notifications for various applications. Non-smartphone applications, including wearable device traffic (periodic location information, etc.), sensors (industrial wireless sensor networks periodically or time-based transmission of temperature, pressure readings, etc.), smart meters and smart meter networks send periodic Meter readings, Heart-beat/keep-alive traffic from IM/email clients and other apps, and push notifications from various apps.

Currently, the SDT technology can support the transmission process based on random access (RA) and the transmission process based on configuration authorization (configured grant, CG), corresponding to the processes shown in FIG. 2 and FIG. 3 .

Figure 2 shows the RA-based SDT (RA-basedSDT) process. The main processes include:

S201, when the terminal device meets the standard for initiating SDT based on random access, it initiates an SDT process on the selected NUL carrier or SUL carrier.

Specifically, the terminal device in the inactive state can determine to execute the SDT process according to the relationship between the amount of data to be transmitted and the corresponding threshold, as well as the relationship between the reference signal receiving power (RSRP) and the corresponding threshold. For example, when the terminal device determines that the current amount of data to be transmitted is less than a preset threshold, and the terminal device determines that the RSRP is greater than the preset RSRP threshold, the SDT process is initiated. Of course, the terminal device can also initiate the SDT process according to the relationship between other information and the threshold value and the SDT selection criterion. For example, the other information can be reference signal receiving quality (RSRQ), beam quality, etc., this application Not limited.

S202, the terminal device performs carrier selection.

Specifically, the terminal device selects the NUL carrier or the SUL carrier based on the RSRP threshold configured in the system information. The RSRP threshold may be referred to as the carrier selection RSRP threshold, that is, the threshold is used for carrier selection. For example, if the RSRP currently measured by the terminal device is less than the threshold, the terminal device selects the SUL carrier, otherwise, the terminal device selects the NUL carrier. In addition, the signal that can be used for carrier selection can also be RSRQ or beam quality, etc., then the corresponding carrier selection threshold can be called carrier selection RSRQ threshold, carrier selection beam quality threshold, etc., which is not limited in this application.

It can be understood that, before initiating SDT, the terminal device may also select a carrier first, and then select the transmission method according to the SDT standard, which is small data transmission based on random access or small data transmission based on configuration authorization. Alternatively, the above two steps can also be performed simultaneously. There is no necessary sequence between the above selection of the small data transmission mode and the selection of the uplink carrier.

S203, the terminal device sends a first message to the network device.

Specifically, the terminal device sends the random access preamble on the selected carrier. The terminal device may choose to send the random access preamble on the SDT dedicated random access opportunity, or the terminal device may send the SDT dedicated preamble on the selected carrier.

S204, the network device sends a random access response message, also referred to as a second message, to the terminal device.

Specifically, after receiving the first message sent by the terminal device, the network device determines that the terminal device initiates small data transmission based on random access, and the network device sends a random access response message to the terminal device, which may carry a temporary Temporary cell radio network temporary identifier (TC-RNTI), timing advance, and uplink grants assigned to terminal equipment. The TC-RNTI is used to identify the terminal equipment under the air interface of a cell.

S205, the terminal device sends a third message to the network device.

Specifically, the terminal device sends a third message on the uplink grant allocated to it in the second message, where the third message includes uplink data and an RRC recovery request. In addition, a buffer status report (BSR) may also be included, such as a BSR MAC CE, which is used to indicate the current buffer information to the network device. A release assistance indication (RAI) may also be included, where the RAI is used to indicate subsequent data information of the terminal device to the network device.

S206, the network device sends a contention resolution message to the terminal device.

Specifically, after receiving the RRC message and data sent by the terminal device, the network device sends a contention resolution message. The contention resolution message does not contain RRC signaling. After the terminal device receives the contention resolution message sent by the network device, it considers random access The process is successfully completed, at which point the TC-RNTI is upgraded to a C-RNTI. At this point, the terminal device is still in an inactive state.

S207, the terminal device sends subsequent uplink data to the network device.

Specifically, if there is further subsequent data to be transmitted, the network device can schedule the uplink grant for subsequent data transmission by using the C-RNTI dynamic scheduling method, and the subsequent data is transmitted on the uplink grant scheduled by the network device. For example, the network device may send downlink control information, where the downlink control information carries information of uplink transmission resources.

S208, the network device sends an RRC release message to the terminal device.

Specifically, if there is no further subsequent data to be transmitted, the network device sends an RRC release message to terminate the SDT process.

Figure 3 shows the CG-based SDT (CG-based SDT) process. The main processes include:

S301 , when the terminal device meets the standard for initiating CG-based SDT, it initiates an SDT process on the selected NUL carrier or SUL carrier.

Specifically, the terminal device in the inactive state may determine to execute the SDT process according to the relationship between the amount of data to be transmitted and the corresponding threshold, and the relationship between the RSRP and the corresponding threshold. For example, when the terminal device determines that the current amount of data to be transmitted is less than a preset threshold, and the terminal device determines that the RSRP is greater than the preset RSRP threshold, the SDT process is initiated. Of course, the terminal device can also initiate the small data transmission process according to the relationship between other information and the threshold value SDT selection criteria, for example, the other information can be RSRQ, beam quality, etc., which is not limited in this application.

S302, the terminal device performs carrier selection.

Similarly, before initiating SDT, the terminal device may also select a carrier first, and then select the transmission method according to the SDT standard, which is small data transmission based on random access or small data transmission based on configuration authorization. Alternatively, the above two steps can also be performed simultaneously. There is no necessary sequence between the above selection of the small data transmission mode and the selection of the uplink carrier.

S303, the terminal device sends an RRC recovery request message and uplink data to the network device.

Optionally, the uplink message may also include auxiliary information of the terminal device, for example, may also include a buffer status report (buffer status report, BSR), where the BSR is used to indicate the current buffer information to the network device. RAI can also be used, and RAI is used to indicate the subsequent data information of the terminal device to the network device.

S304, the network device replies with a response message.

Optionally, the response message may be a layer 1 acknowledgement (acknowledgement, ACK) or a radio link control (radio link control, RLC) ACK.

S305, the terminal device sends subsequent uplink data to the network device.

Specifically, if there is further subsequent data to be transmitted, the network device may schedule the grant for subsequent data transmission by using the C-RNTI for dynamic scheduling, and the subsequent data is transmitted on the uplink grant scheduled by the network device. For example, the network device may send downlink control information, where the downlink control information carries information of uplink transmission resources.

S306, the network device sends an RRC release message to the terminal device.

Specifically, if there is no further subsequent data to be transmitted, the network device sends an RRC release message to terminate the SDT process. Next, the carrier switching method proposed in this application will be described in detail.

Before the specific description, it should be emphasized first that when the carrier selected by the terminal equipment is configured with the resources of small data transmission (CG-SDT) based on the configuration authorization, and the configured CG-SDT resources are valid, then the terminal equipment chooses to execute CG -SDT, otherwise the terminal device chooses to perform RA-SDT.

It should be understood that the above-mentioned SDT process may change with the evolution of the technical solution, and the technical solution provided by the present application is not limited to the process described below.

The present application provides various methods for switching carriers, which will be described below with reference to FIG. 4 to FIG. 10 respectively. It should be understood that these carrier switching methods can be used in combination with each other. For example, it may be that a certain process in the process of the terminal device accessing the network device uses one method and another process uses another method, or a certain process in the process of the terminal device accessing the network device uses both a method. One method uses another method.

The present application provides a variety of carrier switching methods. It should be understood that the steps in the embodiments of the present application may not be partially executed, and the steps in the embodiments of the present application may not strictly follow the order of the examples, which is not limited in the present application. .

FIG. 4 shows a schematic diagram of a method 400 for switching carriers provided by an embodiment of the present application. As shown in FIG. 4 , the method for switching carriers includes:

S401, a terminal device sends first information to a network device.

Specifically, the terminal device determines the information of the reference signal measured by the current cell. When certain conditions are met, the terminal device considers that the current uplink transmission carrier may need to be switched, and the terminal device needs to report the information of the reference signal to the network device. The terminal device Send first information to the network device, where the first information is used by the network device to switch the current carrier of the terminal device to another carrier.

For example, the information of the reference signal may be reference signal receiving power (reference signal receiving power, RSRP) or reference signal receiving quality (reference signal receiving quality, RSRQ) or other reference signal information.

Exemplarily, the first information may be carried in a medium access control (medium access control, MAC) control element (control element, CE), for example, define an RSRP MAC CE for RSRP reporting, or use an RRC message It is reported to the network device, which is not limited in this application.

Wherein, the terminal device considers that the current carrier for uplink transmission needs to be switched, which may be determined by the terminal device according to the value of the current first information.

In a possible implementation manner, the terminal device initiates an SDT process to the network device when it meets the criteria for initiating SDT, and the terminal device selects a normal/normal uplink (NUL) carrier according to the downlink path loss with reference to RSRP Or a supplementary/supplementary uplink (SUL) carrier. Specifically, the terminal device selects the NUL carrier or the SUL carrier based on the RSRP threshold configured in the system information. The RSRP threshold may be referred to as the carrier selection RSRP threshold, that is, the threshold is used for carrier selection. For example, the terminal device measures the RSRP of the current cell, and if the RSRP is less than the threshold, the terminal device selects the SUL carrier, otherwise, the terminal device selects the NUL carrier.

In the disconnected state, the terminal device can always measure, the terminal device can determine to send the first information to the network device according to the range of the current measurement value, and the network device determines the switching of the uplink carrier based on the first information. For example, when the terminal device currently transmits on the NUL carrier, if the RSRP measured by the terminal device is greater than or equal to the first threshold and less than or equal to the second threshold, the terminal device sends the RSRP measurement value to the network device, and the measurement value can be used by the network device. For reference, when the network device determines to configure time-frequency resources for transmission on the SUL carrier for the terminal device, it can be understood that the network device determines to switch the uplink carrier from the NUL carrier to the SUL carrier. Or, when the current terminal device is on the SUL carrier, if the terminal device measures RSRP greater than or equal to the third threshold and less than or equal to the fourth threshold, the terminal device sends the RSRP measurement value to the network device, and the measurement value can be used by the network device for reference. , the network device determines to configure time-frequency resources for transmission on the NUL carrier for the terminal device, which can be understood as the network device determines to switch the uplink carrier from the current SUL carrier to the NUL carrier.

As a possible implementation manner, the first threshold may be the current carrier selection RSRP threshold, and the value of the second threshold may be related to the first threshold, that is, a compensation value is added on the basis of the first threshold. The value of the compensation amount is configured by the network device in the system information or configured by the network device in the last RRC release message. In addition, the second threshold value may also be a new defined threshold value, that is, it is understood as a preset threshold value. At this time, when the first information is greater than or equal to the first threshold and less than or equal to the second threshold, the terminal device sends the first information to the network device, and the first information is used by the network device to switch the normal uplink NUL carrier to the auxiliary uplink. It can be understood that when the value of RSRP is smaller, until it is in the range of the carrier selection threshold to the carrier selection threshold plus a compensation amount, or until it is in the range of the carrier selection threshold to the preset threshold, the terminal device according to the change of RSRP (gradually decreasing) It is predicted in advance that the RSRP may be smaller than the carrier selection threshold (the NUL selection condition is not met, but the SUL selection condition is met), therefore, sending the RSRP measurement value to the network device can make the network device predict the change trend in advance , so as to allocate time-frequency resources for uplink transmission to the terminal equipment, where the time-frequency resources are the time-frequency resources on the SUL carrier.

Similarly, the third threshold and the fourth threshold may also be related to the current carrier selection RSRP threshold. Optionally, the third threshold may be a value obtained by subtracting a compensation amount from the carrier selection RSRP threshold, or may be the above-mentioned first threshold. Threshold, the fourth threshold may be the carrier selection RSRP threshold, or may be the above-mentioned second threshold. In addition, the third threshold value and the fourth threshold value may also be a new defined threshold value, that is, it is understood as a preset threshold value. At this time, when the first information is greater than or equal to the third threshold and less than or equal to the fourth threshold, the terminal device sends the first information to the network device, and the first information is used by the network device to switch the auxiliary uplink SUL carrier to the normal uplink It can be understood that, for example, when the value of RSRP is larger, the terminal is within the range from the carrier selection threshold minus a compensation amount to the carrier selection threshold, or until it is in the range from the preset threshold to the carrier selection threshold. The device predicts in advance that the RSRP may be greater than or equal to the carrier selection threshold (the SUL selection condition is not satisfied, but the NUL selection condition is satisfied) according to the change of the RSRP (gradually increasing), therefore, sending the RSRP measurement value to the network device can make The network device predicts the change trend in advance, so as to allocate the time-frequency resource for uplink transmission on the time-frequency resource NUL carrier for data transmission to the terminal device.

It should be noted that "preset" may include predefined definitions, for example, protocol definitions. Wherein, "pre-definition" can be implemented by pre-saving corresponding codes, forms or other means that can be used to indicate relevant information in the device, and this application does not limit the specific implementation means.

It can be understood that the above threshold may be pre-configured by the network device to the terminal device, for example, may be sent to the terminal device through system information or provided to the terminal device in the previous RRC release message.

S402, the network device sends downlink control information (downlink control information, DCI) to the terminal device.

Specifically, after the network device receives the first information sent by the terminal device, the network device switches the uplink carrier of the terminal device according to the first information, that is, the network device configures the terminal device through DCI information of uplink transmission resources of other carriers.

Based on the method for switching carriers of the present application, the terminal device reports the first information, and the network device configures the terminal device with time-frequency resources for uplink transmission based on the first information. Different carriers enable terminal devices in a disconnected state to implement carrier switching, which ensures the reliability and accuracy of uplink data transmission.

In the embodiments of this application, the disconnected state is mentioned many times. It should be noted that the disconnected state may represent the state of other terminals other than the connected state, for example, it may be an inactive state or an idle state or other states. is not in a connected state. Alternatively, the disconnected state may be represented by an inactive state and an idle state, which is not limited in this application.

FIG. 5 shows a schematic diagram of a method 500 for switching carriers provided by an embodiment of the present application. As shown in FIG. 5 , in this embodiment, the carrier selected by the terminal device is not configured with CG resources, or the CG resources are invalid or do not meet the requirements for initiating CG-based small data transmission cannot be selected due to the condition of CG transmission, therefore, the terminal device initiates random access small data transmission on the selected carrier. Specifically, the method for switching carriers includes:

S501, when the terminal device meets the standard for initiating SDT based on random access, it initiates an SDT process on the selected NUL carrier or SUL carrier.

Specifically, the terminal device in the inactive state may determine to execute the SDT process according to the relationship between the amount of data to be transmitted and the corresponding threshold, and the relationship between the RSRP and the corresponding threshold. For example, when the terminal device determines that the current amount of data to be transmitted is less than a preset threshold, and when the terminal device determines that the RSRP is greater than the preset RSRP threshold, a small data transmission process is initiated. Of course, the terminal device may also determine to initiate the SDT process according to the relationship between other information and the threshold. For example, the other information may be RSRQ, beam quality, etc., which is not limited in this application.

S502, the terminal device performs carrier selection.

In other possible implementations, before initiating SDT, the terminal device may also select a carrier first, and then select the transmission method according to the SDT standard, which is small data transmission based on random access or small data transmission based on configuration authorization. transmission. Alternatively, the above two steps can also be performed simultaneously. There is no necessary sequence between the above selection of the small data transmission mode and the selection of the uplink carrier.

S503, the terminal device sends a first message to the network device.

Specifically, the terminal device sends the random access preamble on the selected carrier, where the terminal device may choose to send the random access preamble on a random access occasion dedicated to SDT, or the terminal device may choose to send the random access preamble on the selected carrier. The SDT dedicated preamble is sent on the carrier.

S504, the network device sends a random access response message, also referred to as a second message, to the terminal device.

Specifically, after receiving the first message sent by the terminal device, the network device determines that the terminal device initiates small data transmission based on random access, and the network device sends a random access response message to the terminal device, which may carry TC- RNTI, timing advance, and uplink grants assigned to terminal devices. The TC-RNTI is used to identify the terminal equipment under the air interface of a cell.

S505, the terminal device sends a third message to the network device.

Specifically, the terminal device sends a third message on the uplink grant allocated to it in the second message, where the third message includes uplink data and an RRC recovery request. In addition, a buffer status report (BSR) may also be included, and the buffer report may be a BSR MAC CE, and the BSR MAC CE is used to indicate the current buffer information to the network device. A release assistance indication (RAI) may also be included, where the RAI is used to indicate subsequent data information of the terminal device to the network device.

S506, the network device sends a contention resolution message to the terminal device.

Specifically, after receiving the RRC message and data sent by the terminal device, the network device sends a contention resolution message. The contention resolution message does not contain RRC signaling, and the random access process is considered to be successfully completed. At this time, the TC-RNTI is upgraded to C- RNTI. At this point, the terminal device is still in an inactive state.

S507, the terminal device sends auxiliary information to the network device.

Specifically, the auxiliary information may be, for example, information of reference signals measured by the cell where the terminal device is located, including RSRP information, RSRQ information, or beam quality information, and the like. When there is subsequent data that needs to be transmitted, since the terminal device is always measuring in the inactive state, the terminal device determines that the RSRP measurement value at this time needs to be reported to the network device according to the range of the RSRP value obtained by the measurement.

It should be noted that this step 507 may also be performed simultaneously with step 505, or the above-mentioned third message may also carry the auxiliary information. Alternatively, the auxiliary information can also be sent simultaneously with the uplink data bearer in the following step 509 in the same message, or performed simultaneously with the step 509 . Alternatively, the step 507 can also be before or after any other steps, in other words, the step 507 and the other steps have no necessary sequence.

Optionally, this step may also be that the terminal device reports a measurement report to the network device.

Specifically, in the disconnected state, the terminal device always measures the reference signal information of the cell, and when the measurement result of the terminal device meets the triggering condition of the measurement event, the terminal device reports the measurement result to the network device. Wherein, the reference signal may be RSRP or RSRQ or beam quality, the information of the reference signal may include RSRP information or RSRQ information or beam quality information, and correspondingly, the measurement result may be RSRP information or RSRQ information of the cell where it is located. information or beam quality, etc.

Illustratively, the measurement event may be an A2 event. The description of the A2 event is that when the sum of the measurement result of the serving cell and the hysteresis parameter of the event is lower than a certain threshold, the terminal device will trigger the A2 event and report the measurement result. If the condition is not met, the measurement result will not be reported. The threshold can be flexibly set according to different scenarios. If the network device receives the report of the measurement result, it means that the quality of the carrier signal of the cell accessed by the terminal device is poor, and the terminal device is less likely to approach the network device site, that is, it is likely to be located at the edge of the network device site. The probability that the terminal equipment is covered by the high-frequency energy-saving carrier is also smaller.

As an example but not a limitation, in a possible implementation manner, when the reference signal is RSRP and the measurement result is RSRP, the following two scenarios may be included:

scene one:

When initiating SDT, the terminal device selects the NUL carrier for uplink data transmission according to the RSRP greater than or equal to the carrier selection threshold. During subsequent data transmission, the terminal device measures the RSRP value. If the RSRP measured by the terminal device is greater than or equal to the first threshold value When it is less than or equal to the second threshold, the terminal device sends the RSRP measurement value to the network device, the measurement value can be used for reference by the network device, and the network device can decide whether to configure the transmission time-frequency on the SUL carrier for the terminal device according to the measurement value. resource.

Scenario two:

When initiating SDT, the terminal device selects the NUL carrier for uplink data transmission according to the RSRP being less than or equal to the carrier selection threshold. During subsequent data transmission, if the terminal device measures RSRP greater than or equal to the third threshold and less than or equal to the fourth threshold , the terminal device sends the RSRP measurement value to the network device, and the measurement value can be used by the network device for reference, whether to configure the time-frequency resources transmitted on the NUL carrier for the terminal device.

It should be understood that the first to fourth thresholds in this embodiment correspond to the first to fourth thresholds in FIG. 4 , respectively.

S508, the network device sends the DCI to the terminal device.

Specifically, the network device switches the carrier according to the information of the reference signal reported by the terminal device, and dynamically schedules the uplink grant on the switched carrier by means of DCI for subsequent data transmission.

It should be noted that, the above-mentioned network device switching carriers may not perform this action directly, that is, the network device indicates that the carrier switching is performed by the uplink grants of other carriers carried in the DCI.

S509, the terminal device sends uplink data to the network device.

Specifically, after receiving the DCI sent by the network device, the terminal device performs subsequent data transmission on the uplink grant of the switched carrier scheduled by the DCI.

S510, the network device sends an RRC release message.

Specifically, when the uplink data transmission of the terminal device ends, that is, when there is no further subsequent data transmission, the network device sends an RRC release message to the terminal device to terminate the SDT process. At this time, the terminal device may remain in the disconnected state, or may be directly released to the idle state.

It should be noted that the network device can switch the uplink transmission carrier for the terminal device according to the auxiliary information reported by the terminal device, that is, the uplink transmission resource scheduled by the DCI sent by the network device to the terminal device can be located on the switched carrier. Of course, the network device may also not perform carrier switching after receiving the auxiliary information.

In this embodiment of the present application, the terminal equipment reports the measured reference signal information, such as RSRP information, to the network equipment, so that the network equipment configures the authorized time-frequency resources for uplink data transmission according to the measured RSRP information. The authorized resources for uplink data transmission on the carrier enable the terminal equipment in the disconnected state to implement carrier switching, which ensures the accuracy and reliability of the data transmitted in the uplink. In addition, since the threshold selection range of the reported measured RSRP information is in the critical range of the carrier selection threshold, that is, the network device can determine whether the terminal device switches the carrier according to the change trend of the RSRP reported by the terminal device. The frequency resources are used for subsequent uplink transmission, which further improves the reliability of uplink transmission.

FIG. 6 shows a schematic diagram of a method 600 for switching carriers provided by an embodiment of the present application. This embodiment is mainly aimed at that when the terminal device reports the measurement result to the network device, the method is compared with the method shown in FIG. 5 . It may also include two steps of measurement event configuration request and measurement event configuration. As shown in FIG. 6 , in this embodiment, the carrier selected by the terminal equipment is not configured with CG resources, or the CG resources are invalid or do not meet the conditions for initiating CG transmission, so CG-based small data transmission cannot be selected. Random access small data transmission is initiated on the selected carrier. Specifically, the method for switching carriers includes:

It should be noted that, in this embodiment, for the convenience of description, the steps that are the same as those in the above-mentioned embodiment are not repeated in this embodiment.

S601, a terminal device sends a measurement report configuration request message to a network device.

Specifically, in the connected state, the terminal device sends a request message to the network device. The request message is used to request the network device for the configuration of measurement reporting. The configuration for measurement reporting may be the configuration of a measurement reporting trigger event, such as a measurement reporting trigger event. threshold, etc.

When the measurement event is described as serving cell quality lower than a certain threshold, the terminal equipment will report the measurement result or measurement report of the measurement event.

By way of example and not limitation, the measurement event may be an A2 event. The description of the A2 event is that when the quality of the serving cell is lower than a certain threshold, the terminal device will report the A2 event, and if the condition is not met, the A2 event will not be reported, and the threshold can be flexibly set according to different scenarios.

In a possible implementation manner, the measurement reporting event may be a new event for performing measurement reporting in a disconnected state.

It should be noted that the request message is not necessary, and when the method for switching carriers as shown in FIG. 6 is adopted, the terminal device may not need to send the request message to the network device.

S602, the network device sends measurement reporting configuration information to the terminal device.

Specifically, the measurement reporting configuration information may include configuration information of a measurement reporting triggering event, where the measurement reporting configuration information is used by the terminal device to determine to trigger the measurement reporting in the RRC inactive state.

For example, the measurement reporting trigger event may be an A2 event. Alternatively, the measurement reporting trigger event may be a new event used for measurement reporting in a disconnected state. When the measurement report triggering event is an A2 event, it should be understood that the configuration information of the A2 event can be added to any message capable of carrying the measurement configuration information. A new information element (IE) is added to some information elements of the release message to configure the A2 event.

When the measurement reporting triggering event is a new event that the terminal device performs measurement reporting in the disconnected state, the configuration information of the event can be added to any message that can carry the measurement configuration information. Specifically, the network device can release the terminal device to enter the In the RRC disconnected state, a new information element (information element, IE) is added to some information elements of the RRC release message to configure this event.

As a possible implementation manner, a trigger event for triggering measurement reporting of the terminal equipment may be reconfigured or added in the RRC release message. Specifically, the RRC release message carries a report configuration, where the report configuration includes a triggering event for measurement reporting, and further, the triggering event includes a threshold for triggering measurement reporting. A possible implementation manner, for example, adding an a2-Threshold to eventA2 in the "EventTriggerConfig" information element for triggering the A2 event in the inactive state of the terminal device, such as a2-Threshold-I.

It can be configured by:

For example, the threshold for event A2 can be reconfigured.

Alternatively, an offset field may be added to the "ReportConfigNR" information element for measurement in an inactive state of the terminal device.

Alternatively, a new event for triggering the measurement and reporting of the terminal equipment can also be added to the "EventTriggerConfig" information element in the RRC release message, for example, eventA2-I, which is used for the terminal equipment in the inactive state. The measurement results of A2 events are reported.

After the terminal device receives the configuration information, if the triggering conditions of the measurement reporting event are met, the measurement result reporting is triggered.

Specifically, the terminal device measures the reference signal information of the serving cell where it is located, and the specific content of the measured reference signal information may be RSRP and/or RSRQ, and may also be beam quality. The terminal device compares the measurement result with a preset threshold, wherein the threshold is configured by the network device according to actual needs, which is not limited in this application.

It should be noted that the measurement event configuration request message may send the request message to the network device when the terminal device is in the connected state, or may send the request message to the network device after the terminal device enters the disconnected state. Not limited.

Step 603 corresponds to step 501 shown in FIG. 5 , step 604 corresponds to step 502 shown in FIG. 5 , step 605 corresponds to step 503 shown in FIG. 5 , step 606 corresponds to step 504 shown in FIG. Step 505 and step 608 shown in FIG. 5 correspond to step 506 shown in FIG. 5 , and will not be repeated here.

S609, the terminal device triggers measurement reporting, and reports the measurement result to the network device.

A possible implementation manner, the measurement reporting trigger event may be an A2 event. At this time, when the measurement result + hysteresis parameter (that is, the hysteresis defined for the event in ReportConfigNR) is less than or equal to the threshold, the measurement result reporting is triggered, that is, Trigger into A2 or event. The selection of the threshold varies according to the above-mentioned A2 event configuration, and may correspondingly include: a2-Threshold-1 or a2-Threshold or a2-Threshold+offset.

Another possible implementation manner, the measurement reporting trigger event may be a new event for measurement reporting in the disconnected state, such as A2-I, etc. At this time, when the measurement result + hysteresis parameter is satisfied (that is, in ReportConfigNR is When the hysteresis defined by this event is less than or equal to the threshold, the measurement result is triggered to report. Wherein, the threshold is configured in the corresponding event.

Step 610 corresponds to step 508 shown in FIG. 5 , step 611 corresponds to step 509 shown in FIG. 5 , and step 612 corresponds to step 510 shown in FIG. 5 .

In addition, in the embodiments of this application, the disconnected state is mentioned many times. It should be noted that the disconnected state may represent the state of other terminals other than the connected state, for example, it may be an inactive state or an idle state Or other states that are not connected. Alternatively, the disconnected state may be represented by an inactive state and an idle state, which is not limited in this application.

In the embodiment of this application, for a terminal device that has subsequent transmission of SDT in the inactive state, when the current carrier of the terminal device cannot be used due to the change of RSRP, or when the terminal device needs to switch the carrier, the inactive state download wave switching mechanism is introduced, and the terminal device By reporting auxiliary information or reporting measurement results, the base station can perform carrier switching through DCI scheduling according to the reported information, thereby ensuring successful transmission of subsequent SDT data.

FIG. 7 shows a schematic diagram of a method 700 for switching carriers provided by an embodiment of the present application. As shown in FIG. 7 , as shown in FIG. 7 , in this embodiment, the carrier selected by the terminal device is not configured with CG resources or CG The CG-based small data transmission cannot be selected because the resources are invalid or the conditions for initiating CG transmission are not met. Therefore, the terminal device initiates random access small data transmission on the selected carrier. The terminal device initiates random access small data transmission on the selected carrier. Specifically, the method for switching carriers includes:

S701, the network device sends an RRC release message to the terminal device.

Specifically, the network device sends an RRC release message to the terminal device to instruct the terminal device to enter the disconnected state. The RRC release message may carry the configuration of the SRS, for example, may include a transmission period or a transmission frequency.

S702, when the terminal equipment meets the criteria for initiating SDT, it initiates an SDT process on the selected NUL carrier or SUL carrier.

Specifically, the terminal device in the inactive state may determine to execute the SDT process according to the relationship between the amount of data to be transmitted and the corresponding threshold and the relationship between the RSRP and the corresponding threshold. For example, when the terminal device determines that the current amount of data to be transmitted is less than a preset threshold, and when the terminal device determines that the RSRP is greater than the preset RSRP threshold, a small data transmission process is initiated. Of course, the terminal device may also determine to initiate the SDT process according to the relationship between other information and the threshold. For example, the other information may be RSRQ, beam quality, etc., which is not limited in this application.

S703, the terminal device performs carrier selection.

It can be understood that the above steps 702 and 703 do not have a certain sequence, and the network device can first select the carrier, and then select the transmission method according to the SDT standard, which is small data transmission based on random access or small data transmission based on configuration authorization. transmission. Alternatively, the above two steps can also be performed simultaneously. There is no necessary sequence between the above selection of the small data transmission mode and the selection of the uplink carrier.

S704, the terminal device sends the first message.

When the terminal equipment in the inactive state satisfies the SDT selection criteria, the terminal equipment selects the NUL or SUL carrier according to the RSRP threshold configured in the system information, and initiates SDT on the selected carrier. At this time, if the carrier selected by the terminal device is not configured with CG resources or does not meet the conditions for initiating CG transmission and cannot select CG-based small data transmission, the terminal device initiates a random access-based SDT process.

Specifically, the terminal device sends a first message to the network device on the selected carrier, where the first message may be a random access preamble.

It should be understood that the random access preamble may be a preamble sent by the terminal device at the random access opportunity for SDT, or may be a dedicated preamble of SDT, which is not limited in this application.

S705, the network device sends a second message.

Specifically, the network device determines, based on the first message sent by the terminal device, that the terminal device has initiated SDT based on random access, and the network device sends a second message to the terminal device in response to the first message, where the second message may be a random access Incoming response, the response message may include TC-RNTI, timing advance and uplink grant.

S706, the terminal device sends a third message.

Specifically, after receiving the second message, the terminal device sends a third message on the uplink grant in the second message, where the uplink data and the RRC recovery request are multiplexed in the third message.

Optionally, the uplink message may also include BSR MAC CE or RAI, which is used to indicate to the network device information about subsequent data transmission of the terminal device.

S707, the network device sends a fourth message.

S708, the terminal device sends the SRS.

Specifically, after the contention is resolved, due to subsequent data transmission, when the SRS sending condition is satisfied, the terminal device sends the SRS to the network device.

It should be noted that the premise for the terminal device to send the SRS is that the network device sends the SRS configuration information to the terminal device, and the configuration information can be configured in the process shown in FIG. The terminal device enters the RRC release message in the inactive state, that is, step 701 .

Optionally, the SRS configuration information can also be configured in the above-mentioned fourth message, wherein the fourth message can multiplex an RRC release message in addition to the contention, and the RRC release message is used to configure the SRS to the terminal device, but the The release message includes indication information, which is used to indicate that the message is used to send the SRS configuration without terminating the SDT process.

It should be understood that the terminal device can also request the SRS configuration from the network device first, and the terminal device can send request information to the network device. Optionally, the request information can be carried in the above-mentioned third message, that is, the third message is the terminal device. The third message to initiate the SDT procedure.

As a possible implementation manner, the request configuration information may also be sent to the network device through the terminal device in the non-SDT random access.

Next, the transmission conditions of the SRS will be described. When any one or any combination of the following conditions are satisfied, the terminal device sends the SRS to the network device.

(1) The terminal device starts to determine to send the SRS only after receiving the fourth message sent by the network device, that is, after the contention is successfully resolved. It should be noted that the time period for sending the SRS needs to be before the end of the SDT process, that is, when the contention resolution process is completed until the end of the SDT process, the terminal device can send the SRS to the network device within the configured SRS sending period.

(2) The SRS is sent only when the terminal device determines that there is subsequent data transmission.

(3) The SRS can be sent in the whole process after the terminal device initiates the SDT.

(4) When the signal quality measured by the terminal device is greater than or equal to the fifth threshold and less than or equal to the sixth threshold, the terminal device sends the SRS. It should be noted that the fifth threshold may be the above-mentioned carrier selection RSRP threshold, and the sixth threshold may correspond to the value of the fifth threshold, for example, a compensation value is added to the fifth threshold. At this time, the scenario corresponds to that the terminal device speculates that the signal quality may be lower than the carrier selection threshold. If the terminal device transmits uplink data on the NUL carrier at this time, then the SRS sent by the terminal device is expected to be configured by the network device for the terminal device. Time-frequency resources transmitted on the SUL carrier.

Alternatively, when the signal quality measured by the terminal device is greater than or equal to the seventh threshold and less than or equal to the eighth threshold, the terminal device sends the SRS. It should be noted that the sixth threshold may be a value obtained by subtracting a compensation amount from the carrier selection RSRP threshold, or may also be the aforementioned fifth threshold, and the eighth threshold may be the carrier selection RSRP threshold or the aforementioned sixth threshold value of . In addition, the seventh threshold and the eighth threshold may also be a new defined threshold. At this time, the scenario corresponds to that the terminal device speculates that the signal quality may be greater than the carrier selection threshold. If the terminal device transmits uplink data on the SUL carrier at this time, then the SRS sent by the terminal device is expected to be configured by the network device for the terminal device. Time-frequency resources transmitted on the NUL carrier.

It should be understood that the above threshold and compensation amount are pre-configured by the network device to the terminal device, for example, may be sent to the terminal device through system information or provided to the terminal device in the previous RRC release message.

(5) When the terminal device transmits data on the uplink transmission authorization resource based on the configured authorization, the condition may be after the terminal device sends the first data packet to the network device.

S709, the network device performs measurement.

Specifically, after receiving the SRS sent by the terminal device, the network device performs RSRP or RSRQ measurement of the SRS.

S710, the network device sends the DCI to the terminal device.

Specifically, the network device determines whether the current carrier of the terminal device needs to be switched according to the measurement result. For example, when the network device measures the RSRP of the SRS, when the measured RSRP value of the network device is greater than the carrier selection RSRP threshold, at this time, if the current carrier of the terminal device is SUL, the network device can switch the carrier to NUL for the terminal device, that is, The network device schedules the authorized resources of the NUL carrier for the terminal device through the DCI, which is used for the subsequent data transmission of the terminal device.

It should be noted that, in the above situation, that is, when the measured value of the network device is greater than the carrier selection RSRP threshold, if the current carrier of the terminal device is NUL, then the network device decides that it is not necessary to switch the carrier. At this time, the network device is still in the current state. Dynamic scheduling grants on the carrier for subsequent data transmission.

Similarly, when the measured value of the network device is less than the carrier selection RSRP threshold, if the current carrier of the terminal device is NUL, the network device can switch the carrier to SUL for the terminal device. If the current carrier of the terminal device is SUL, the network device can not Switch the carrier for the terminal device.

Optionally, for the above-mentioned situation where the carrier needs to be switched, the network device may also use 1 bit in the DCI to indicate that the carrier of the terminal device has been switched. For example, when the bit is 0, it can indicate that the resource dynamically scheduled by the network device is NUL. Grant on the carrier, when the bit is 1, it can indicate that the resource dynamically scheduled by the network device is the grant on the SUL carrier. Of course, 0 can also be used to indicate that the network device has not switched the current carrier of the terminal device, and 1 can be used to indicate that the network device has switched the current carrier of the terminal device. In addition, the bits in the DCI may be redundant bits, which is not limited in this application.

S711, the terminal device performs subsequent data transmission.

Specifically, the terminal device performs subsequent data transmission on the corresponding authorized resource based on the scheduling or instruction of the network device.

S712, the network device sends an RRC release message.

Specifically, when the uplink data transmission of the terminal device ends, that is, when there is no further subsequent data transmission, the network device sends an RRC release message to the terminal device to terminate the SDT process. It should be understood that at this time, the terminal device still remains in a disconnected state.

In this embodiment of the present application, the network device measures the SRS sent by the terminal device. When the received power or quality of the current SRS is poor, the network device can switch the carrier for subsequent data transmission by the terminal device, so that the uplink data of the terminal device can be reliable. and accurate transmission.

FIG. 8 shows a schematic diagram of a method 800 for switching carriers provided by an embodiment of the present application. As shown in FIG. 8 , in this embodiment, the carrier selected by the terminal device is not configured with CG resources or the CG resources are invalid or do not meet the requirements for initiating CG-based small data transmission cannot be selected due to the condition of CG transmission, therefore, the terminal device initiates random access small data transmission on the selected carrier. Specifically, the method for switching carriers includes:

At present, when a terminal device is in a disconnected state, it will perform RSRP measurement, but cannot switch carriers autonomously. The method provided by this embodiment of the present application enables the terminal device in a disconnected state to autonomously choose whether to perform the measurement according to the measurement result. carrier switching and indicate it to the network equipment.

As shown in Figure 8, when the terminal device selects small data transmission based on random access, after the contention resolution is completed, due to the existence of subsequent data, for example, there is still data to be transmitted in the buffer area of the terminal device or there is the next new SDT The data arrives, at this time, the terminal device will continue to transmit the subsequent data on the current carrier.

It should be noted that, for the convenience of description, the same steps as above are not described in detail in this embodiment, and therefore, will not unduly affect the protection scope of the present application.

S801 to S806 respectively correspond to steps 501 to 506 shown in FIG. 5 , and details are not repeated here.

S807, the terminal device performs carrier switching according to the measurement result.

Specifically, when the current carrier of the terminal equipment is NUL, if the terminal equipment determines that the current RSRP is less than the first threshold according to the measurement result, for example, when the first threshold may be the carrier selection RSRP threshold, the terminal equipment autonomously switches the NUL carrier to the SUL carrier . Or, when the current carrier of the terminal device is SUL, if the terminal device determines according to the measurement result that the current RSRP is greater than or equal to the first threshold, for example, when the first threshold may be the carrier selection RSRP threshold, the terminal device autonomously switches the SUL carrier to the NUL carrier .

As a possible implementation method, after the terminal device performs carrier switching, the terminal device can start a timer at the same time, and the timer can be a dedicated timer for carrier switching. During the running of the timer, the terminal device cannot The carrier switching is performed autonomously. When the timer expires and the RSRP of the terminal device still does not meet the RSRP threshold of the current carrier, the terminal device can perform the autonomous carrier switching. Optionally, the timer may be configured by the network device in system information.

At this time, since the terminal device switches the carrier based on the measurement result, the random access-based SDT process or the traditional random access process or the configured authorized SDT process will be triggered, respectively corresponding to FIG. 8 , FIG. 9 , and FIG. 10 .

First, the random access-based SDT shown in FIG. 8 will be described in detail.

S808, the terminal device sends a random access preamble.

Specifically, the random access preamble may be a preamble sent by the terminal device at the random access opportunity used for SDT, or may be a dedicated preamble of SDT, which is not limited in this application.

S809, the network device sends a response message.

Specifically, after receiving the preamble sent by the terminal device, the network device determines that the terminal device triggers the random access procedure of the SDT on the switched carrier. In response to the random access procedure, the network device sends a response message to the terminal device. The response message may carry a temporary C-RNTI, such as a TC-RNTI, a timing advance TA, and an uplink grant resource for subsequent data transmission. It should be understood that, The uplink grant resource is on the carrier after the handover.

S810, the terminal device sends uplink data.

Specifically, after receiving the uplink grant resource sent by the network device, the terminal device sends an uplink message on the resource, where the uplink message includes uplink small data. The uplink message may also include the identity information of the UE, such as C-RNTI or TC-RNTI.

In a possible implementation manner, the message carrying the uplink data may not include the RRC recovery request message, but only the C-RNTI MAC CE, which can avoid the recovery of the integrity message authentication code (message authentication code for) in the RRC recovery request message. integrity, resumeMAC-I) security risk of reuse.

S811, the network device sends a contention resolution message.

Specifically, the network device sends a contention resolution message to the terminal device, and the contention resolution message indicates that the contention resolution is successful. At this time, the TC-RNTI of the terminal device is upgraded to a C-RNTI and is still in a disconnected state.

It should be noted that when the contention is successfully resolved, the TC-RNTI of the terminal device is upgraded to a C-RNTI, and the C-RNTI replaces the value of the C-RNTI in S805.

When subsequent data transmission continues, the network device will continue to configure the time-frequency resource grant for the terminal device to transmit uplink data through DCI. The grant is the uplink grant resource on the carrier after the switch, and can also be understood as the uplink where the S810 message is sent. carrier, and then the terminal device sends subsequent data on the uplink grant scheduled by the network device. If the terminal equipment continues to measure and finds that the switching conditions are met, that is, the process described in step 807, the terminal equipment will switch the carrier again, and the steps 807 to 811 will be repeated again.

S812, the network device sends an RRC release message.

If there is no further data transmission, the network device sends an RRC release message to the terminal device to terminate the SDT process. At this time, the terminal device is still in a disconnected state.

It should be understood that in the embodiments of this application, the disconnected state is mentioned many times. It should be noted that the disconnected state may represent the state of other terminals other than the connected state, for example, it may be an inactive state or an idle state state or other states that are not connected. Alternatively, the disconnected state may be represented by an inactive state and an idle state, which is not limited in this application.

In this embodiment of the present application, the terminal device in the disconnected state automatically switches the carrier based on the measurement result, and notifies the network to perform uplink carrier switching, which ensures that the data in the small data transmission process can be successfully transmitted, and ensures the transmission of uplink data. accuracy. In addition, if the terminal device starts the carrier switching timer after switching the carrier autonomously, it can also avoid the "ping-pong effect" caused by frequent carrier switching, improve the efficiency of data transmission, and save power consumption.

FIG. 9 shows a schematic diagram of a method 900 for switching carriers provided by an embodiment of the present application. As shown in FIG. 9 , after the terminal device switches carriers autonomously, a traditional random access process is triggered, that is, subsequent data transmission will be Transmission in the connected state of the terminal device.

Specifically, in the embodiment shown in FIG. 9 , the following specific steps are mainly included:

S901 to S907 correspond to steps 801 to 807 in the above-mentioned process shown in FIG. 8 respectively, and are not repeated here.

S908, the terminal device sends a random access preamble to the network device.

Specifically, the preamble is a traditional random access preamble, and is distinguished from the SDT dedicated preamble. Or optionally, the random access timing of the preamble transmission is different from the timing of the SDT process.

S909, the network device sends a random access response to the terminal device.

Specifically, the network device determines, according to the preamble sent by the terminal device, that the terminal device has initiated a traditional random access procedure, and in response to the traditional random access, the network device sends the response message to the terminal device.

S910, the terminal device sends an RRC recovery request message to the network device.

Specifically, the terminal device sends an RRC connection recovery request through the uplink common control channel, where the request message may carry the identification information of the UE (for example, UEID such as C-RNTI or TC-RNTI), the reason for connection recovery (the terminal-originated information information such as command, terminal-originated data, terminal-originated abnormal data, or terminal-terminated call) and restoration integrity message authentication code resumeMAC-I.

S911, the network device sends a contention resolution message to the terminal device.

Specifically, the network device sends a contention resolution message to the terminal device to instruct the terminal device to enter the connected state. Then, the untransmitted small data will be transmitted after the terminal device enters the connected state.

Optionally, the contention resolution message may be an RRC recovery message, or the contention resolution message may be sent to the terminal device together with the RRC recovery message.

S912, the terminal device sends uplink data to the network device.

Specifically, after the terminal device enters the connected state, the terminal device transmits uplink data on the switched uplink carrier.

S913, the network device sends the DCI to the terminal device.

Specifically, if the terminal device has further subsequent data, the network device schedules the terminal device through the DCI to schedule authorized resources of an uplink carrier different from the current uplink carrier for the terminal device to transmit subsequent data.

S914, the terminal device performs subsequent data transmission.

S915, the network device sends an RRC release message.

In this embodiment of the present application, after autonomously switching the carrier, the terminal device triggers a traditional random access procedure on the switched carrier, requests to enter the connected state, and transmits subsequent small data in the connected state. Based on this solution, terminal equipment can switch carriers autonomously without scheduling through network equipment, which saves resources, improves the efficiency of uplink data transmission, and ensures that subsequent small data can be successfully transmitted.

If, after the terminal equipment switches carriers autonomously, when the selected carrier is configured with CG-SDT resources, the terminal equipment initiates CG-SDT on the selected carrier. For example, the process shown in FIG. 10 is different from the process shown in the above embodiment The same steps are not repeated here.

In the process shown in FIG. 10 , for the first transmission, the carrier selected by the terminal device does not have CG resources configured or the CG resources are invalid or do not meet the conditions for initiating CG transmission, so CG-based small data transmission cannot be selected. Therefore, the terminal device cannot select CG-based small data transmission. A random access small data transmission is initiated on the selected carrier. Specifically, the method for switching carriers includes:

S1001 to S1006 are the same as steps 501 to 506 shown in FIG. 5 above, and will not be repeated here.

S1007, the terminal device switches the carrier.

Specifically, as described in the above embodiments of method 800 and method 900, after the terminal device switches the current uplink carrier according to the measurement result, if the terminal device determines that the currently switched carrier is configured with the configured uplink grant and the CG resource is valid, And if the conditions for initiating CG-based transmission are met, the subsequent small data of the terminal device will be transmitted based on the configured authorization.

S1008, the terminal device sends uplink data to the network device.

Specifically, the terminal device performs the SDT process of the CG on the currently switched carrier.

S1009, the network device sends the DCI to the terminal device.

S1010, the terminal device performs subsequent data transmission.

S1011, the network device sends an RRC release message.

Specifically, when the uplink data transmission of the terminal device is completed, that is, when there is no further subsequent data transmission, the network device sends an RRC release message to the terminal device to terminate the SDT process. It should be understood that at this time, the terminal device still remains in a disconnected state.

In the embodiment of the present application, when the current uplink carrier of the terminal device cannot be used due to the change of RSRP, the terminal device autonomously performs carrier switching, which facilitates the dynamic scheduling of further subsequent data by the network device, and ensures that in the disconnected state, the terminal device can Successful transfer of small data.

Fig. 11 shows a schematic diagram of a method 1100 for carrier switching provided by an embodiment of the present application. As shown in Fig. 11 , in this embodiment, a terminal device initially initiates a carrier switching based on a small data transmission standard on a selected carrier. Configured authorized small data transfers. Specifically, the carrier switching method includes:

S1101, when the terminal equipment meets the criteria for initiating SDT, it initiates an SDT process on the selected NUL carrier or SUL carrier.

S1102, the terminal device performs carrier selection.

It can be understood that the above steps 1101 and 1102 do not have a certain sequence, and the network device can first select the carrier, and then select the transmission method according to the SDT standard, which is small data transmission based on random access or small data transmission based on configuration authorization. transmission. Alternatively, the above two steps can also be performed simultaneously. There is no necessary sequence between the above selection of the small data transmission mode and the selection of the uplink carrier.

S1103, the terminal device sends uplink data on the CG resource of the selected uplink carrier.

Specifically, after initiating CG-SDT, the terminal device sends an uplink message on the resource, and the uplink message includes uplink small data. Optionally, it also includes an RRC recovery request message.

S1104, the network device replies with a response message.

Optionally, the response message may be, the response message may be an acknowledgement message (acknowledgement, ACK) of layer 1 or an ACK of radio link control (radio link control, RLC).

S1105, the terminal device performs carrier switching according to the measurement result.

Specifically, S1103 and S807 perform the same process. I won't go into details here.

Optionally, the S1103 may also be a combination of S401 and S402.

S1106, the terminal device sends uplink data on the switched carrier.

Specifically, the terminal device sends subsequent uplink data on the uplink authorized resource on the switched carrier.

In a possible implementation manner, the terminal device S110 and S807 perform the same process. If there are configured authorized resources on the switched carrier, the terminal device sends uplink data on the switched carrier based on the configured authorized resources.

In another possible implementation manner, the terminal device S1103 is a combination of S401 and S402, and the terminal device sends uplink data on the uplink transmission resource configured in S402.

S1107, the network device sends an RRC release message.

In this embodiment of the present application, the terminal device in the disconnected state automatically switches the carrier based on the measurement result, and notifies the network to perform uplink carrier switching, or the terminal device reports auxiliary information or measurement results, etc., and the network device is based on the information reported by the terminal device. Configure a time-frequency resource for uplink transmission for the terminal device, and the time-frequency resource for uplink transmission is on a carrier different from the carrier of the first information, so that the terminal device in the disconnected state can implement carrier switching, ensuring that the small data transmission process. The data can be successfully transmitted, which ensures the reliability and accuracy of uplink data transmission.

It should be noted that, when the method of switching carriers is described in this application, such as FIG. 4 to FIG. 7 , the RA-based SDT is used as an example for the initial data transmission process. It should be clear to those skilled in the art that, during the initial data transmission, if CG is configured on the carrier selected by the terminal device and CG-based SDT conditions are met, the terminal device will transmit data based on the configured authorization. Specifically, for the method 400, the first information will be sent by the terminal device to the network device on the carrier for which the authorization is configured. For the method 500 shown in FIG. 5 or the method 600 shown in FIG. 6 , the assistance information or the measurement report will be sent on the carrier for which the grant is configured. For the method 700 shown in FIG. 7 , the SRS will be sent on the carrier for which the grant is configured. sent on.

It should be understood that the initial data transmission from the method 800 to the method 1000 may still be authorization based on the configuration, which will not be repeated in this application.

In the above, the methods provided by the embodiments of the present application are described in detail with reference to FIGS. 4 to 11 . Hereinafter, the apparatus for switching carriers provided by the embodiments of the present application will be described in detail with reference to FIG. 12 to FIG. 16 .

FIG. 12 is a schematic block diagram of an apparatus for switching carriers provided by an embodiment of the present application. As shown in the figure, the apparatus 10 for switching carriers may include a processing module 11 and a transceiver module 12 .

In a possible design, the apparatus 10 for switching carriers may correspond to the network equipment in the above method embodiments.

Specifically, the apparatus 10 for switching carriers may correspond to the network equipment in method 400, method 500, method 600, method 700, method 800, method 900, and method 1000 according to the embodiments of the present application, and the apparatus 10 for switching carriers may Including for performing method 400 in FIG. 4 or method 500 in FIG. 5 or method 600 in FIG. 6 or method 700 in FIG. 7 or method 800 in FIG. 8 or method 900 in FIG. Modules of a method performed by a network device in method 1000. In addition, each unit in the apparatus 10 for switching carriers and the above-mentioned other operations and/or functions are for implementing the method 400 in FIG. 4 or the method 500 in FIG. 5 or the method 600 in FIG. 6 or the method 700 in FIG. 7 respectively. Or the corresponding flow of the method 800 in FIG. 8 or the method 900 in FIG. 9 or the method 1000 in FIG. 10 or the method 1100 in FIG. 11 .

Wherein, when the apparatus 10 for switching carriers is used to execute the method 400 in FIG. 4 , the transceiver module 12 may be used to execute steps 401 and 402 in the method 400 .

When the apparatus 10 for switching carriers is used to execute the method 500 in FIG.

When the apparatus 10 for switching carriers is used to execute the method 600 in FIG. 6 , the transceiver module 12 can be used to execute steps 601 , 602 , and 605 to 612 in the method 600 .

When the apparatus 10 for switching carriers is used to perform the method 700 in FIG. 7 , the processing module 11 can be used to perform step 709 in the method 700 . The transceiver module 12 can be used to perform steps 701 , steps 704 to 708 , and steps 710 to 712 in the method 700 .

When the device 10 for switching carriers is used to execute the method 800 in FIG. 8 , the transceiver module 12 can be used to execute steps 803 to 806 and steps 808 to 812 in the method 800 .

When the apparatus 10 for switching carriers is used to execute the method 900 in FIG. 9 , the transceiver module 12 can be used to execute steps 903 to 906 and steps 908 to 915 in the method 900 .

When the apparatus 10 for switching carriers is used to execute the method 1000 in FIG. 10 , the transceiver module 12 can be used to execute steps 1003 to 1006 and steps 1008 to 1011 in the method 1000 .

When the apparatus 10 for switching carriers is used to execute the method 1100 in FIG. 11 , the transceiver module 12 can be used to execute steps 1103 to 1104 and steps 1106 to 1107 in the method 1100 .

FIG. 13 is a schematic block diagram of an apparatus for switching carriers provided by an embodiment of the present application. As shown in the figure, the apparatus 20 for switching carriers may include a transceiver module 21 and a processing module 22 .

In a possible design, the apparatus 20 for switching carriers may correspond to the terminal equipment in the above method embodiments, or a chip configured in the terminal equipment.

Specifically, the apparatus 20 for switching carriers may correspond to the terminal equipment in the

methods

400 , 500 , 600 , 700 , 800 , 900 , and 1000 according to the embodiments of the present application, and the apparatus for switching carriers 20 may include methods for performing method 400 in FIG. 4 or method 500 in FIG. 5 or method 600 in FIG. 6 or method 700 in FIG. 7 or method 800 in FIG. 8 or method 900 in FIG. The modules of the method performed by the terminal device in the method 1000. In addition, the units in the apparatus 20 for switching carriers and the above-mentioned other operations and/or functions are respectively for implementing the method 400 in FIG. 4 or the method 500 in FIG. 5 or the method 600 in FIG. 6 or the method 700 in FIG. 7 . Or the corresponding flow of the method 800 in FIG. 8 or the method 900 in FIG. 9 or the method 1000 in FIG. 10 or the method 1100 in FIG. 11 .

When the apparatus 20 for switching carriers is used to perform the method 400 in FIG. 4 , the transceiver module 21 can be used to perform steps 401 and 402 in the method 400 .

When the apparatus 20 for switching carriers is used to perform the method 500 in FIG. 5 , the transceiver module 21 can be used to perform steps 503 to 510 in the method 500 . The processing module 22 may be used to perform steps 501 and 502 in the method 500 .

When the apparatus 20 for switching carriers is used to execute the method 600 in FIG. 6 , the transceiver module 21 can be used to execute steps 601 and 602 , and steps 605 to 612 in the method 600 . The processing module 22 can be used to perform steps 603 and 604 in the method 600 .

When the apparatus 20 for switching carriers is used to perform the method 700 in FIG. 7 , the transceiver module 21 can be used to perform steps 701 , 704 to 708 , and 710 to 712 in the method 700 . The processing module 22 may be configured to perform steps 702 and 703 in the method 700 .

When the apparatus 20 for switching carriers is used to execute the method 800 in FIG. 8 , the transceiver module 21 can be used to execute steps 803 to 806 and steps 808 to 812 in the method 800 . The processing module 22 can be used to execute steps 801 , 802 , and 807 in the method 800 .

When the apparatus 20 for switching carriers is used to execute the method 900 in FIG. 9 , the transceiver module 21 can be used to execute steps 903 to 906 and steps 908 to 915 in the method 900 . The processing module 22 can be used to execute steps 901 , 902 and 907 in the method 900 .

When the apparatus 20 for switching carriers is used to execute the method 1000 in FIG. 10 , the transceiver module 21 can be used to execute steps 1003 to 1006 and steps 1008 to 1011 in the method 1000 . The processing module 22 can be used to execute steps 1001 , 1002 and 1007 in the method 1000 .

When the apparatus 20 for switching carriers is used to execute the method 1100 in FIG. 11 , the transceiver module 21 can be used to execute steps 1103 to 1104 and steps 1106 to 1107 in the method 1100 . The processing module 22 can be used to execute steps 1101 , 1102 , and 1105 in the method 1100 .

According to the foregoing method, FIG. 14 is a schematic diagram of an apparatus 30 for switching carriers provided by an embodiment of the application. As shown in FIG. 14 , the apparatus 30 may be a network device, including a network element with an access management function, such as an AMF.

The apparatus 30 may include a processor 31 (ie, an example of a processing module) and a memory 32 . The memory 32 is used for storing instructions, and the processor 31 is used for executing the instructions stored in the memory 32, so that the device 30 can realize the implementation of FIG. 4, FIG. 5, or FIG. 6, or FIG. 7, or FIG. The steps performed by the network device in the method corresponding to FIG. 11 .

Further, the device 30 may further include an input port 33 (ie, an example of a transceiver module) and an output port 34 (ie, another example of a transceiver module). Further, the processor 31, the memory 32, the input port 33 and the output port 34 can communicate with each other through an internal connection path to transmit control and/or data signals. The memory 32 is used to store a computer program, and the processor 31 can be used to call and run the computer program from the memory 32 to control the input port 33 to receive signals, control the output port 34 to send signals, and complete the network device in the above method. step. The memory 32 may be integrated in the processor 31 or may be provided separately from the processor 31 .

Optionally, the input port 33 can be a receiver, and the output port 34 can be a transmitter. The receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.

Optionally, if the device 30 for switching carriers is a chip or a circuit, the input port 33 is an input interface, and the output port 34 is an output interface.

As an implementation manner, the functions of the input port 33 and the output port 34 can be considered to be implemented by a transceiver circuit or a dedicated chip for transceiver. The processor 31 can be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

As another implementation manner, a general-purpose computer may be used to implement the communication device provided by the embodiments of the present application. The program codes that will implement the functions of the processor 31 , the input port 33 and the output port 34 are stored in the memory 32 , and the general-purpose processor implements the functions of the processor 31 , the input port 33 and the output port 34 by executing the codes in the memory 32 .

Wherein, each unit or unit in the apparatus 30 for switching a carrier may be used to perform each action or processing process performed by the network device in the above method, and the detailed description thereof is omitted here in order to avoid redundant description.

For the concepts related to the technical solutions provided by the embodiments of the present application involved in the device 30 , for explanations and detailed descriptions, and other steps, please refer to the descriptions of the foregoing methods or other embodiments, which will not be repeated here.

According to the foregoing method, FIG. 15 is a schematic diagram of an apparatus 40 for switching carriers provided by an embodiment of the present application. As shown in FIG. 15 , the apparatus 40 may be a terminal device.

The apparatus 40 may include a processor 41 (ie, an example of a processing module) and a memory 42 . The memory 42 is used for storing instructions, and the processor 41 is used for executing the instructions stored in the memory 42, so that the apparatus 40 can realize FIG. 4, FIG. 5, or FIG. 6, or FIG. 7, or FIG. 8, or FIG. Steps performed by the terminal device in FIG. 11 .

Further, the device 40 may further include an input port 43 (ie, an example of a transceiver module) and an output port 44 (ie, another example of a transceiver module). Further, the processor 41, the memory 42, the input port 43 and the output port 44 can communicate with each other through an internal connection path to transmit control and/or data signals. The memory 42 is used to store a computer program, and the processor 41 can be used to call and run the computer program from the memory 42 to control the input port 43 to receive signals, control the output port 44 to send signals, and complete the process of the terminal device in the above method. step. The memory 42 may be integrated in the processor 41 or may be provided separately from the processor 41 .

Optionally, the input port 43 can be a receiver, and the output port 44 can be a transmitter. The receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.

Optionally, if the device 40 for switching carriers is a chip or a circuit, the input port 43 is an input interface, and the output port 44 is an output interface.

As an implementation manner, the functions of the input port 43 and the output port 44 can be considered to be realized by a transceiver circuit or a dedicated chip for transceiver. The processor 41 can be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

As another implementation manner, a general-purpose computer may be used to implement the communication device provided by the embodiments of the present application. The program codes that will implement the functions of the processor 41 , the input port 43 and the output port 44 are stored in the memory 42 , and the general-purpose processor implements the functions of the processor 41 , the input port 43 and the output port 44 by executing the codes in the memory 42 .

The modules or units in the apparatus 40 for switching carriers may be used to perform actions or processing procedures performed by the terminal device in the above method, and detailed descriptions thereof are omitted here in order to avoid redundant descriptions.

For the concepts related to the technical solutions provided by the embodiments of the present application involved in the apparatus 40, for explanations and detailed descriptions and other steps, please refer to the descriptions of the foregoing methods or other embodiments, which will not be repeated here.

FIG. 16 is a schematic structural diagram of a terminal device 50 provided by the present application. For convenience of explanation, FIG. 16 only shows the main components of the terminal device. As shown in FIG. 16 , the terminal device 50 includes a processor, a memory, a control circuit, an antenna, and an input and output device.

The processor is mainly used to process communication protocols and communication data, and to control the entire terminal device, execute software programs, and process data of the software programs, for example, for supporting the terminal device to execute the above-mentioned transmission precoding matrix instruction method embodiment. the described action. The memory is mainly used to store software programs and data, such as the codebook described in the above embodiments. The control circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. The control circuit together with the antenna can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.

When the terminal device is powered on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.

Those skilled in the art can understand that, for the convenience of description, FIG. 16 only shows one memory and one processor. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in this embodiment of the present application.

As an optional implementation manner, the processor may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data, and the central processing unit is mainly used to control the entire terminal device, execute A software program that processes data from the software program. The processor in FIG. 14 integrates the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit may also be independent processors, interconnected by technologies such as a bus. Those skilled in the art can understand that a terminal device may include multiple baseband processors to adapt to different network standards, a terminal device may include multiple central processors to enhance its processing capability, and various components of the terminal device may be connected through various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

As shown in FIG. 16 , the terminal device 50 includes a transceiver unit 51 and a processing unit 52 . The transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, or the like. Optionally, the device for implementing the receiving function in the transceiver unit 51 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 51 may be regarded as a transmitting unit, that is, the transceiver unit 51 includes a receiving unit and a transmitting unit. Exemplarily, the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, and the like, and the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.

The terminal device shown in FIG. 16 can perform the actions performed by the terminal device in the

above methods

400 , 500 , 600 or 700 or 800 or 900 or 1000 or 1100 , and detailed descriptions thereof are omitted here to avoid redundant description.

It should be understood that, in this embodiment of the present application, the processor may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), dedicated integrated Circuit (application specific integrated circuit, ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-only memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically programmable Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory may be random access memory (RAM), which acts as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (DRAM) Access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Souble data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory Access memory (Synchlink DRAM, SLDRAM) and direct memory bus random access memory (Direct rambus RAM, DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server or data center by wire (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that contains one or more sets of available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media. The semiconductor medium may be a solid state drive.

It should be understood that the term "and/or" in this document is only an association relationship to describe associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, and A and B exist at the same time , there are three cases of B alone. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment. In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

A method for switching carriers, comprising:

The terminal device sends first information to the network device, where the first information is used by the network device to switch the first carrier to the second carrier, the first information includes information of the reference signal of the terminal device, the terminal The device is in a disconnected state;

The terminal device receives downlink control information, where the downlink control information carries information of uplink transmission resources, and the uplink transmission resources are on the second carrier.
The method according to claim 1, wherein the information of the reference signal comprises reference signal received power or reference signal received quality.
The method according to claim 1 or 2, wherein the terminal device sends first information to a network device, and the first information is used by the network device to switch the first carrier to the second carrier, comprising:

When the first information is greater than or equal to the first threshold and less than or equal to the second threshold, the terminal device sends the first information to the network device, and the first information is used by the network device The link NUL carrier is switched to the secondary uplink SUL carrier,

or,

When the first information is greater than or equal to the third threshold and less than or equal to the fourth threshold, the terminal device sends the first information to the network device, and the first information is used by the network device to assist the uplink. The link SUL carrier is switched to the normal uplink NUL carrier.
The method according to any one of claims 1 to 3, wherein the first information is carried in a medium access control information element MAC CE or a radio resource control RRC message.
The method according to claim 1 or 2, wherein the terminal device sends the first information to the network device, comprising:

When the quality of the serving cell is lower than the fifth threshold, the terminal device sends the first information to the network device.
The method according to claim 5, wherein the method further comprises:

receiving, by the terminal device, measurement reporting configuration information from the network device, where the measurement reporting configuration information includes the fifth threshold;

The terminal device measures the quality of the serving cell in the disconnected state.
The method according to claim 6, wherein the terminal device receives measurement reporting configuration information from the network device, comprising:

The terminal device receives an RRC release message from the network device, where the RRC release message includes the measurement reporting configuration information.
A method for switching carriers, comprising:

The network device receives first information from a terminal device, where the first information includes information of a reference signal of the terminal device, the first information is transmitted on a first carrier, and the terminal device is in a disconnected state;

The network device sends downlink control information to the terminal device, where the downlink control information carries information of uplink transmission resources, and the uplink transmission resources are on the second carrier.
The method according to claim 8, wherein the information of the reference signal comprises reference signal received power or reference signal received quality.
The method according to claim 8 or 9, wherein the network device receives the first information from the terminal device, comprising:

When the first information is greater than or equal to the first threshold and less than or equal to the second threshold, the network device receives the first information from the terminal device,

or,

When the first information is greater than or equal to the third threshold and less than or equal to the fourth threshold, the network device receives the first information from the terminal device.
The method according to any one of claims 8 to 10, wherein the first information is carried in a medium access control information element MAC CE or a radio resource control RRC message.
The method according to claim 8 or 9, wherein the network device receives the first information from the terminal device, comprising:

When the quality of the serving cell is lower than the fifth threshold, the network device receives the first information from the terminal device.
The method of claim 12, wherein the method further comprises:

The network device sends measurement reporting configuration information to the terminal device, where the measurement reporting configuration information includes the fifth threshold.
The method according to claim 13, wherein the network device sends measurement reporting configuration information to the terminal device, comprising:

The network device sends an RRC release message to the terminal device, where the RRC release message includes the measurement reporting configuration information.
A device for switching carriers, comprising:

a transceiver module, configured to send first information to a network device, where the first information is used by the network device to switch the first carrier to the second carrier, the first information includes the information of the reference signal of the device, and the the device is in a disconnected state;

The transceiver module is further configured to receive downlink control information, where the downlink control information carries information of uplink transmission resources, and the uplink transmission resources are on the second carrier.
The apparatus according to claim 15, wherein the first information comprises reference signal received power or reference signal received quality.
The device according to claim 15 or 16, characterized in that,

When the first information is greater than or equal to the first threshold and less than or equal to the second threshold, the transceiver module sends the first information to the network device, and the first information is used by the network device to use the normal uplink The link NUL carrier is switched to the secondary uplink SUL carrier,

or,

When the first information is greater than or equal to the third threshold and less than or equal to the fourth threshold, the transceiver module sends the first information to the network device, where the first information is used by the network device to assist the uplink The SUL carrier is switched to the normal uplink NUL carrier.
The apparatus according to any one of claims 15 to 17, wherein the first information is carried in a medium access control information element MAC CE or a radio resource control RRC message.
The device according to claim 15 or 16, characterized in that,

When the quality of the serving cell is lower than the fifth threshold, the transceiver module sends the first information to the network device.
The apparatus of claim 19, wherein:

The transceiver module is further configured to receive measurement reporting configuration information from the network device, where the measurement reporting configuration information includes the fifth threshold;

and a processing module, configured to measure the quality of the serving cell in the disconnected state.
The apparatus of claim 20, wherein:

The transceiver module is further configured to receive an RRC release message from the network device, where the RRC release message includes the measurement reporting configuration information.
A device for switching carriers, comprising:

a transceiver module, configured to receive first information from a terminal device, where the first information includes information of a reference signal of the terminal device, the first information is transmitted on a first carrier, and the terminal device is in a disconnected state ;

The transceiver module is further configured to send downlink control information to the terminal device, where the downlink control information carries information of uplink transmission resources, and the uplink transmission resources are on the second carrier.
The apparatus according to claim 22, wherein the information of the reference signal comprises reference signal received power or reference signal received quality.
The device according to claim 22 or 23, wherein the transceiver module is specifically used for:

When the first information is greater than or equal to the first threshold and less than or equal to the second threshold, the transceiver module receives the first information from the terminal device,

or,

When the first information is greater than or equal to the third threshold and less than or equal to the fourth threshold, the transceiver module receives the first information from the terminal device.
The apparatus according to any one of claims 22 to 24, wherein the first information is carried in a medium access control information element MAC CE or a radio resource control RRC message.
The device according to claim 22 or 23, wherein the transceiver module is specifically used for:

When the quality of the serving cell is lower than the fifth threshold, the transceiver module receives the first information from the terminal device.
The apparatus of claim 26, wherein:

The transceiver module is further configured to send measurement reporting configuration information to the terminal device, where the measurement reporting configuration includes the fifth threshold.
The device according to claim 27, wherein the transceiver module is specifically used for:

Send an RRC release message to the terminal device, where the RRC release message includes the measurement reporting configuration information.
An apparatus for switching carrier waves, characterized in that the apparatus includes a processor and a storage medium, the storage medium stores instructions, and when the instructions are executed by the processor, the processor executes the method of claim 1 The method of any one of to 7.
An apparatus for switching carrier waves, characterized in that the apparatus comprises a processor and a storage medium, wherein the storage medium stores instructions, and when the instructions are executed by the processor, the processor executes the method as claimed in claim 8 The method of any one of to 14.
A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and when the computer program runs on a computer, the computer is made to execute any one of claims 1 to 7. method described in item.
A computer-readable storage medium, characterized in that, a computer program is stored on the computer-readable storage medium, and when the computer program runs on a computer, the computer is made to execute any one of claims 8 to 14. method described in item.