Communication method and device

Abstract

A communication method and apparatus, wherein the method includes: obtaining first configuration information from a network device, the first configuration information being used to instruct the transmission of a sounding reference signal (SRS) in a first time period and at least one downlink carrier; when configured to transmit an uplink signal in at least one uplink carrier in the first time period, configuring a transmission channel based on a carrier aggregation (CA) mode, and transmitting the SRS in the at least one downlink carrier and the uplink signal in the at least one uplink carrier through the transmission channel in the first time period, wherein the center frequency and bandwidth of the transmission channel configured based on the CA mode are jointly determined based on the at least one downlink carrier and the at least one uplink carrier.

Description

Technical Field

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

[0002] In communication systems such as the Long Term Evolution (LTE) system and the New Radio (NR) system, carrier aggregation (CA) technology has been introduced, which allows terminal devices to be configured with multiple carriers to improve data throughput. When the network equipment configures multiple downlink component carriers (CCs) for a terminal device, the terminal device can usually only receive downlink data or downlink control signaling in the configured downlink CCs, in addition to sending uplink sounding reference signals (SRS). The SRS is used to provide a channel estimation reference for downlink data reception in the current CC.

[0003] When a terminal device transmits an SRS on a downlink CC, it interrupts data transmission on the uplink CC. After the SRS transmission is complete, the terminal device switches back to the uplink CC to resume uplink data transmission. The process of a terminal device transmitting SRS in multiple CCs is called carrier rotation. Current standards define a carrier rotation switching time, typically greater than 100 μs. During this carrier rotation switching time, the terminal device needs to adjust the center frequency of the signal output by the phase-locked loop (PLL) to match the center frequency of the switched CC.

[0004] In summary, it can be seen that since the uplink data transmission of the terminal device needs to be interrupted during the carrier rotation period, the uplink transmission performance is reduced. Summary of the Invention

[0005] The purpose of this application is to provide a communication method and apparatus to solve the problem of how to reduce the impact on uplink transmission performance when performing carrier rotation.

[0006] It should be understood that in the solutions provided herein, the communication device may be a wireless communication device or a component of a wireless communication device, such as an integrated circuit product such as a system chip or a communication chip. The wireless communication device may be a computer device that supports wireless communication functions.

[0007] Specifically, a wireless communication device may be a terminal such as a smartphone, or a wireless access network device such as a base station. A system chip may also be referred to as a system on chip (SoC), or simply as an SoC chip. A communication chip may include a baseband processing chip and a radio frequency processing chip. A baseband processing chip is sometimes also referred to as a modem or baseband chip. A radio frequency processing chip is sometimes also referred to as a radio frequency transceiver or radio frequency chip. In physical implementation, some or all of the chips in a communication chip may be integrated inside a SoC chip. For example, a baseband processing chip is integrated into a SoC chip, and a radio frequency processing chip is not integrated with the SoC chip.

[0008] In a first aspect, a communication method is provided, including: obtaining first configuration information from a network device, the first configuration information being used to indicate sending a sounding reference signal (SRS) in a first time period and at least one downlink carrier; when configured to send an uplink signal in at least one uplink carrier in the first time period, configuring a transmission channel based on a carrier aggregation (CA) mode, and sending the SRS in the at least one downlink carrier and sending an uplink signal in the at least one uplink carrier through the transmission channel in the first time period, wherein a center frequency and a bandwidth of the transmission channel configured based on the CA mode are jointly determined based on the at least one downlink carrier and the at least one uplink carrier.

[0009] In CA mode, the center frequency and bandwidth of the terminal device's transmission channel are determined jointly by at least one downlink carrier that needs to send SRS and at least one uplink carrier that needs to send uplink signals. Therefore, the terminal device can simultaneously send SRS in one downlink carrier and uplink signals in another uplink carrier. This can avoid transmission interruption of the uplink signal being transmitted in the uplink carrier when sending SRS, thereby improving uplink efficiency.

[0010] In an optional implementation, the center frequency of the transmit channel configured based on the CA mode is equal to an average of a center frequency of the at least one downlink carrier and a center frequency of the at least one uplink carrier.

[0011] In an optional implementation, the bandwidth of the transmit channel configured based on the CA mode is the sum of the bandwidth of the at least one downlink carrier and the bandwidth of the at least one uplink carrier.

[0012] In an optional implementation, the method further includes: configuring a transmission channel based on an uplink carrier, and sending an uplink signal in the one uplink carrier through the transmission channel within a second time period; wherein the second time period is not configured to send SRS, and the center frequency and bandwidth of the transmission channel are determined based on the one uplink carrier.

[0013] In an optional implementation, before obtaining the first configuration information, the method further includes:

[0014] Acquire second configuration information from the network device, where the second configuration information is used to indicate a configuration of downlink continuous CA, wherein the downlink continuous CA includes a configuration of the at least one downlink carrier.

[0015] In an optional implementation, obtaining the first configuration information from the network device includes:

[0016] Obtain a radio resource control RRC message from the network device, where the RRC message includes the first configuration information; the RRC message is an RRC connection establishment message or an RRC connection reconfiguration message.

[0017] In an optional implementation manner, the at least one downlink carrier and the at least one uplink carrier are time division duplex (TDD) carriers.

[0018] In an optional implementation manner, a frequency range of the at least one downlink carrier and a frequency range of the at least one uplink carrier are continuous in the frequency domain.

[0019] In an optional implementation manner, the method further includes: sending feedback information to the network device, where the feedback information is used to indicate that the transmission channel is configured based on the CA mode within the first time period.

[0020] Through the above method, the network device can schedule the terminal device to perform uplink transmission within the first time period, thereby improving resource utilization.

[0021] In a second aspect, the present application further provides a communication device capable of implementing any of the methods provided in the first aspect. The communication device may be implemented in hardware or by executing corresponding software implementations in hardware. The hardware or software includes one or more units or modules corresponding to the above-mentioned functions.

[0022] In one possible implementation, the communication device includes a processor configured to support the communication device in executing the corresponding functions of the terminal device in the method described above. The communication device may also include a memory, which may be coupled to the processor and stores program instructions and data necessary for the communication device. Optionally, the communication device also includes a communication interface for supporting communication between the communication device and a device such as a network device.

[0023] In one possible implementation, the communication device includes corresponding functional modules for implementing the steps in the above method. The functions can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0024] In a possible implementation, the structure of the communication device includes a processing unit and a communication unit, which can perform the corresponding functions in the above method example. For details, please refer to the description of the method provided in the first aspect, which will not be repeated here.

[0025] In a third aspect, a radio frequency subsystem is also provided, including:

[0026] processor and memory;

[0027] Wherein, the memory is used to store program instructions;

[0028] The processor is used to execute the program instructions stored in the memory, so that the radio frequency subsystem implements the method in any one of the possible designs mentioned above.

[0029] In a fourth aspect, a radio frequency subsystem is also provided, including:

[0030] processor and interface circuits;

[0031] Wherein, the interface circuit is used to access a memory, wherein the memory stores program instructions;

[0032] The processor is used to access the memory through the interface circuit and execute program instructions stored in the memory, so that the radio frequency subsystem implements the method in any one of the possible designs mentioned above.

[0033] In a fifth aspect, a baseband subsystem is also provided, including:

[0034] processor and memory;

[0035] Wherein, the memory is used to store program instructions;

[0036] The processor is used to execute the program instructions stored in the memory, so that the baseband subsystem implements the method in any one of the possible designs mentioned above.

[0037] In a sixth aspect, a baseband subsystem is also provided, including:

[0038] processor and interface circuits;

[0039] Wherein, the interface circuit is used to access a memory, wherein the memory stores program instructions;

[0040] The processor is used to access the memory through the interface circuit and execute program instructions stored in the memory, so that the baseband subsystem implements the method in any one of the possible designs mentioned above.

[0041] In the seventh aspect, a wireless communication device is provided, which may include: a storage unit for storing program instructions; a processing unit for executing the program instructions in the storage unit to implement a method in any possible design of the aforementioned multiple technical solutions.

[0042] The storage unit may be a memory, such as a volatile memory, for caching these program instructions, which may be loaded from other non-volatile memories into the storage unit when the data scheduling method is running. Of course, the storage unit may also be a non-volatile memory, also integrated within the chip. The processing unit may be a processor, such as one or more processing cores of a chip.

[0043] In an eighth aspect, a computer-readable storage medium is provided, in which computer-readable instructions are stored. When a computer reads and executes the computer-readable instructions, the communication device executes the method in any one of the possible designs described above.

[0044] In a ninth aspect, a computer program product is provided, which, when read and executed by a computer, enables a communication device to execute a method in any one of the possible designs described above.

[0045] In a tenth aspect, a chip is provided, which is connected to a memory and is used to read and execute a software program stored in the memory to implement the method in any one of the possible designs mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A schematic diagram of the structure of a wireless communication system provided in an embodiment of the present application;

[0047] Figure 2 A schematic diagram of carrier configuration for a wireless communication system provided in an embodiment of the present application;

[0048] Figure 3 A schematic diagram of an uplink carrier and a downlink carrier provided in an embodiment of the present application;

[0049] Figure 4 A schematic diagram of a flow chart of an SRS switching operation provided in an embodiment of the present application;

[0050] Figure 5 A schematic structural diagram of a wireless communication device provided in an embodiment of the present application;

[0051] Figure 6 A schematic structural diagram of a wireless communication device provided in an embodiment of the present application;

[0052] Figure 7 A schematic diagram of a carrier provided in an embodiment of the present application;

[0053] Figure 8 A flow chart of a communication method provided in an embodiment of the present application;

[0054] Figure 9 A schematic diagram of an SRS round-trip transmission provided in an embodiment of the present application;

[0055] Figure 10 A schematic diagram of uplink CA provided in an embodiment of the present application;

[0056] Figure 11 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0057] Figure 12 This is a communication device structure provided in an embodiment of the present application. DETAILED DESCRIPTION

[0058] The technical solution provided by the present application is further described below with reference to the accompanying drawings and examples. It should be understood that the system structure and business scenarios provided in the examples of the present application are mainly for explaining some possible implementation methods of the technical solution of the present application and should not be interpreted as a unique limitation on the technical solution of the present application. Those skilled in the art will appreciate that with the evolution of the system and the emergence of newer business scenarios, the technical solution provided by the present application can still be applicable to the same or similar technical problems.

[0059] In wireless communication systems, devices can be divided into those that provide wireless network services and those that use them. Devices that provide wireless network services are those that make up the wireless communication network and can be referred to as network equipment or network elements. Network equipment typically belongs to operators or infrastructure providers, who are responsible for their operation and maintenance. Network equipment can be further divided into radio access network (RAN) equipment and core network (CN) equipment. Typical RAN equipment includes base stations (BS).

[0060] It should be understood that a base station may sometimes also be referred to as an access point (AP) or a transmission reception point (TRP). Specifically, a base station may be a generation Node B (gNB) in a 5G new radio (NR) system or an evolutionary Node B (eNB) in a 4G long term evolution (LTE) system. Depending on the physical form or transmit power of the base station, the base station may be divided into a macro base station or a micro base station. A micro base station is sometimes also referred to as a small base station or a small cell.

[0061] Devices that use wireless network services can be referred to as terminal devices. Terminal devices can establish connections with network devices and provide users with specific wireless communication services based on the services of network devices. It should be understood that due to the closer relationship between terminal devices and users, they are sometimes also referred to as user equipment (UE) or subscriber units (SU). In addition, compared to base stations that are usually placed in fixed locations, terminal devices often move with users and are sometimes also referred to as mobile stations (MS). In addition, some network devices, such as relay nodes (RN) or wireless routers, are sometimes also considered terminal devices because they have UE identities or belong to users.

[0062] Specifically, the terminal device can be a mobile phone, a tablet computer, a laptop computer, a wearable device (such as a smart watch, a smart bracelet, a smart helmet, and smart glasses), and other devices with wireless access capabilities, such as smart cars, various Internet of Things (IoT) devices, including various smart home devices (such as smart meters and smart appliances) and smart city devices (such as security or monitoring equipment, and smart road traffic facilities).

[0063] For ease of presentation, this application will take a base station and a terminal device as an example to describe in detail the technical solutions of the embodiments of the present application.

[0064] Figure 1 This is a schematic diagram of the structure of a wireless communication system provided in an embodiment of the present application. Figure 1 As shown in FIG, a wireless communication system includes a terminal device and a base station. Depending on the transmission direction, the transmission link from the terminal device to the base station is denoted as an uplink (UL), and the transmission link from the base station to the terminal device is denoted as a downlink (DL). Similarly, data transmission in the uplink can be simply referred to as uplink data transmission or uplink transmission, and data transmission in the downlink can be simply referred to as downlink data transmission or downlink transmission.

[0065] In wireless communication systems, base stations (BSs) provide coverage for a specific geographic area through integrated or external antennas. One or more terminal devices within the base station's coverage area can access the base station. A base station can manage one or more cells.

[0066] It should be understood that the wireless communication system may comply with the wireless communication standards of the Third Generation Partnership Project (3GPP), or may comply with other wireless communication standards, such as the 802 series (such as 802.11, 802.15, or 802.20) of the Institute of Electrical and Electronics Engineers (IEEE). Figure 1 Although only one base station and one terminal device are shown in the figure, the wireless communication system may also include other numbers of terminal devices and base stations. In addition, the wireless communication system may also include other network devices, such as core network devices.

[0067] Terminal devices and base stations should be aware of the predefined configurations of the wireless communication system, including the radio access technology (RAT) supported by the system and the wireless resource configuration specified by the system, such as the basic configuration of the radio frequency band and carrier. A carrier is a frequency range that complies with the system regulations. This frequency range can be determined by the center frequency of the carrier (denoted as the carrier frequency) and the bandwidth of the carrier. These system-predefined configurations can be part of the standard protocol of the wireless communication system, or determined through interaction between the terminal device and the base station. The content of the relevant standard protocol may be pre-stored in the memory of the terminal device and the base station, or embodied in the hardware circuit or software code of the terminal device and the base station.

[0068] In this wireless communication system, the terminal device and base station support one or more of the same RATs, such as 5G NR, 4G LTE, or RATs of future evolution systems. Specifically, the terminal device and base station use the same air interface parameters, coding scheme, and modulation scheme, and communicate with each other based on system-defined radio resources.

[0069] Figure 2 This is a schematic diagram of a carrier configuration for a wireless communication system provided in an embodiment of the present application. In this wireless communication system, a base station configures two carrier sets for a terminal device, respectively designated as a first carrier set and a second carrier set. The first carrier set can be used for uplink carrier aggregation; the second carrier set can be used for downlink carrier aggregation. The carriers included in the carrier set can be referred to as component carriers (CCs).

[0070] It should be understood that in this application, a component carrier may correspond to a serving cell of a terminal device. In the Chinese context, a component carrier is sometimes also translated as a component carrier, which can be simply referred to as a carrier, and a serving cell can be simply referred to as a cell. Unless otherwise specified, in this application, the terms "carrier", "component carrier", "aggregated carrier", "aggregated component carrier", "serving cell", "cell", "one of PCell or SCell", "one of PCC or SCC", and "aggregated carrier" can be used interchangeably.

[0071] When the embodiment of the present application is applied to time division duplex (TDD), the uplink carrier used by the terminal device for uplink transmission and the downlink carrier used for downlink transmission are the same carrier. At this time, the carrier included in the first carrier set and the carrier included in the second carrier set can be the same carrier.

[0072] like Figure 2As shown, the first carrier set includes 1 CC, which is recorded as CC 1. The second carrier set includes 4 component carriers, which are recorded as CC 1 to CC 4. It should be understood that Figure 2 In the embodiment, the number of CCs included in the first carrier set and the second carrier set is for illustrative purposes only. In the embodiment of the present application, the first carrier set and the second carrier set may also include other numbers of CCs.

[0073] In the embodiment of the present application, the CCs included in the second carrier set are continuous in the frequency domain and are located in the same frequency band. Figure 2 ,like Figure 3 As shown, the second carrier set includes four component carriers CC 1 to CC 4, all of which are located in the same frequency band and are continuous in the frequency domain.

[0074] Furthermore, the CCs included in the second carrier set are time division duplex (TDD) carriers. Among the CCs included in the second carrier set, at least one CC is not configured with at least one of a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH) required for uplink services. A carrier not configured with a PUSCH may be referred to as a PUSCH-less carrier.

[0075] It should be noted that a terminal device can transmit an SRS in a downlink CC that is not configured with PUCCH or PUSCH. This is used for channel estimation for downlink data reception in that downlink CC. When a terminal device transmits an SRS in a downlink CC, it interrupts data transmission in the uplink CC. After SRS transmission is complete, the terminal device switches back to the uplink CC to resume uplink data transmission. The process of a terminal device transmitting SRS in multiple downlink CCs is called carrier rotation.

[0076] The SRS switching operation is sometimes also referred to as SRS carrier switching, SRS switching, or carrier switching. For example, Figure 2 In this scenario, the base station configures a second carrier set for a terminal device that includes four CCs. However, the terminal device may not be able to send SRS on all four CCs simultaneously, so SRS switching is required. For example, the terminal device may first send data or SRS on CC1, then switch to CC2 and send SRS on CC2. During the switching process from CC1 to CC2, data transmission on CC1 may be interrupted. The longer the data transmission interruption, the greater the impact on system performance. Therefore, it is necessary to minimize the data transmission interruption caused by SRS switching.

[0077] Figure 4 A flowchart of an SRS switching operation is shown in FIG. Figure 4 In the example, the base station configures three downlink CCs and one uplink CC for the terminal device. Figure 4 As shown, a time slot may include 14 orthogonal frequency division multiplexing (OFDM) symbols, which are denoted as symbols 0 to 13. The base station configures three downlink CCs for the terminal device, namely CC 1, CC 2, and CC 3, and the configured uplink CC is denoted as CC 0. First, in symbol 1, the terminal device sends an SRS through CC 1; then, after the data transmission of symbol 2 is completed, the terminal device switches to CC 2 and sends an SRS through CC 2 in symbol 3; then, the terminal device switches to CC 2 and sends an SRS through CC 2 in symbol 3; then, the terminal device switches to CC 3 and sends an SRS through CC 3 in symbol 6.

[0078] The above is just an example, and SRSs in different carriers can also be sent in different time slots. For example, in time slot 1, the terminal device sends SRS via CC 1; then, the terminal device switches to CC 2 and sends SRS via CC 2 in time slot 2.

[0079] exist Figure 4 In the example, it is assumed that the terminal device uses the same RF transmission channel to send uplink data and SRS. When the terminal device sends SRS through CC 1, the RF transmission channel needs to adapt to the frequency of CC 1. When the terminal device switches to CC 2 and CC 3 respectively, the RF transmission channel also needs to adapt to the frequencies of CC 2 and CC 3 respectively. Since the frequencies of CC1, CC 2 and CC 3 are different, it takes a certain amount of time for the frequency adapted by the RF transmission channel of the terminal device to be readjusted from one frequency to another. This time can be recorded as the RF readjustment time, or RF retuning time (RF retuning time), where the RF retuning time can also be called RF retuning delay (RF retuning delay), or RF retuning gap (RF retuning gap). For the convenience of description, they are collectively referred to as RF retuning time below.

[0080] like Figure 4As shown in the figure, during SRS transmission, if data is being transmitted on uplink carrier CC 0, data transmission on CC 0 will be interrupted. As previously mentioned, the data transmission interruption time includes the RF retuning time. Therefore, reducing the RF retuning time can reduce the data transmission interruption time and improve system performance. The RF retuning time is related to the terminal device's hardware and software configuration, especially the terminal device's RF processing hardware and software configuration.

[0081] Figure 5 This is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. The communication device may be a terminal device or a base station in an embodiment of the present application. Figure 5 As shown, the communication device may include an application subsystem, memory, massive storage, a baseband subsystem, a radio frequency integrated circuit (RFIC), a radio frequency front end (RFFE) device, and an antenna (ANT), which may be coupled through various interconnection buses or other electrical connection methods.

[0082] Figure 5 In the figure, ANT_1 represents the first antenna, and so on. ANT_N represents the Nth antenna, where N is a positive integer greater than 1. Tx represents the transmit path, Rx represents the receive path, and different numbers represent different paths. FBRx represents the feedback receive path, PRx represents the main receive path, and DRx represents the diversity receive path. HB represents high frequency, and LB represents low frequency, both of which refer to the relative high and low frequencies. BB represents baseband. It should be understood that Figure 5 The marks and components are for illustration purposes only and are only used as one possible implementation method. The embodiments of the present application also include other implementation methods.

[0083] Among them, the application subsystem can serve as the main control system or main computing system of the communication device, used to run the main operating system and application programs, manage the software and hardware resources of the entire communication device, and provide a user interface for the user. The application subsystem may include one or more processing cores. In addition, the application subsystem may also include driver software related to other subsystems (such as the baseband subsystem). The baseband subsystem may also include one or more processing cores, as well as a hardware accelerator (HAC) and cache.

[0084] Figure 5In the figure, RFFE devices, RFIC 1 (and optional RFIC 2) can together form a RF subsystem. The RF subsystem can be further divided into an RF receive path and an RF transmit path. The RF receive path can receive RF signals through an antenna, process the RF signals (such as amplification, filtering and down-conversion) to obtain a baseband signal, and pass it to the baseband subsystem. The RF transmit path can receive baseband signals from the baseband subsystem, perform RF processing (such as up-conversion, amplification and filtering) on the baseband signals to obtain RF signals, and finally radiate the RF signals into space through an antenna. Specifically, the RF subsystem may include electronic devices such as an antenna switch, an antenna tuner, a low noise amplifier (LNA), a power amplifier (PA), a mixer, a local oscillator (LO), and a filter. These electronic devices can be integrated into one or more chips as needed. The antenna can sometimes also be considered as part of the RF subsystem.

[0085] The baseband subsystem extracts useful information or data bits from baseband signals or converts them into baseband signals to be transmitted. These information or data bits can represent user data such as voice, text, and video, or control information. For example, the baseband subsystem performs signal processing operations such as modulation and demodulation, encoding, and decoding. Different radio access technologies, such as 5G NR and 4G LTE, often have different baseband signal processing operations. Therefore, to support the convergence of multiple mobile communication modes, the baseband subsystem may include multiple processing cores or multiple HACs.

[0086] Furthermore, since RF signals are analog signals, and the signals processed by the baseband subsystem are primarily digital signals, the communication device also requires an analog-to-digital converter. Analog-to-digital converters include analog-to-digital converters (ADCs) that convert analog signals into digital signals, and digital-to-analog converters (DACs) that convert digital signals into analog signals. In the embodiments of the present application, the analog-to-digital converter can be located in either the baseband subsystem or the RF subsystem.

[0087] It should be understood that in the embodiments of the present application, the processing core may represent a processor, which may be a general-purpose processor or a processor designed for a specific field. For example, the processor may be a central processing unit (CPU) or a digital signal processor (DSP). Memory can be divided into volatile memory and non-volatile memory (NVM).

[0088] In an embodiment of the present application, the baseband subsystem and the radio frequency subsystem together constitute a communication subsystem, which provides wireless communication functions for the communication device. Generally, the baseband subsystem is responsible for managing the software and hardware resources of the communication subsystem, and can configure the operating parameters of the radio frequency subsystem. One or more processing cores of the baseband subsystem can be integrated into one or more chips, which can be called a baseband processing chip or a baseband chip. Similarly, an RFIC can be called a radio frequency processing chip or a radio frequency chip. In addition, with the evolution of technology, the functional division of the radio frequency subsystem and the baseband subsystem in the communication subsystem can also be adjusted. For example, part of the functions of the radio frequency subsystem are integrated into the baseband subsystem, or part of the functions of the baseband subsystem are integrated into the radio frequency subsystem. In actual applications, based on the needs of the application scenario, the communication device can adopt a combination of different numbers and types of processing cores.

[0089] In an embodiment of the present application, the RF subsystem may include an independent antenna, an independent RF front-end (RF frontend, RFFE) device, and an independent RF chip. RF chips are sometimes also referred to as receivers, transmitters, or transceivers. Antennas, RF front-end devices, and RF processing chips can all be manufactured and sold separately. Of course, the RF subsystem can also use different devices or different integration methods based on power consumption and performance requirements. For example, some devices belonging to the RF front end are integrated into the RF chip, or even the antenna and RF front-end devices are integrated into the RF chip. The RF chip can also be called an RF antenna module or antenna module.

[0090] In the embodiments of the present application, the baseband subsystem can be implemented as an independent chip, which can be referred to as a modem chip. The hardware components of the baseband subsystem can be manufactured and sold as a unit of a modem chip. A modem chip is sometimes also referred to as a baseband chip or baseband processor. In addition, the baseband subsystem can be further integrated into a SoC chip and manufactured and sold as a unit of a SoC chip. The software components of the baseband subsystem can be built into the hardware components of the chip before the chip leaves the factory, or can be imported from other non-volatile memories into the hardware components of the chip after the chip leaves the factory, or these software components can be downloaded and updated online via a network.

[0091] Figure 6 A schematic structural diagram of a communication device provided in an embodiment of the present application. Figure 6 Figure 1 shows some common components used for radio frequency signal processing in communication devices. Figure 6 Although only one RF receive channel and one RF transmit channel are shown, the communication device in the embodiments of the present application is not limited thereto. The communication device may include one or more RF receive channels and one or more RF transmit channels. The RF receive channel may include modules such as an RF receiver, and the RF transmit channel may include modules such as an RF transmitter. The embodiments of the present application do not list all of the other components included in the RF receive channel and the RF transmit channel.

[0092] Figure 6 The radio frequency transmitter and the radio frequency receiver are each provided with a local oscillator signal by different local oscillator circuits. The local oscillator circuit generally includes a phase locked loop (PLL).

[0093] In the RF receive channel, the RF receiver processes the received signal based on the local oscillator signal provided by the local oscillator circuit in the following manner: The RF signal received from the antenna is selected by the antenna switch and filtered by filter 1 before entering the RF receive channel. Because the RF signal received from the antenna is typically very weak, it is typically amplified using an LNA. The amplified signal is first down-converted using the local oscillator signal by mixer 1, then passes through filter 2 and an analog-to-digital converter (ADC). Finally, after processing by the digital converter, it is input to the baseband subsystem, which completes the baseband signal processing.

[0094] For the RF transmission channel, the RF receiver in the RF transmission channel sends the signal in the following manner according to the local oscillator signal provided by the local oscillator circuit: after the baseband signal is processed by the digital converter, it can be converted into an analog signal through a digital to analog converter (DAC). The analog signal is up-converted into an RF signal using the local oscillator signal through mixer 2. The RF signal is processed by filter 4, PA and filter 3, and finally radiated outward from the selected antenna after being selected by the antenna switch.

[0095] Currently, before performing uplink transmission, a terminal device needs to mix a zero intermediate frequency (ZIF) baseband signal with a local oscillator (LO) signal to generate a RF transmit signal. Conversely, after receiving a downlink signal, the terminal device needs to mix the received RF signal with the LO signal to obtain a zero intermediate frequency baseband signal. In the prior art, for RF transmit signals, the center frequency of the LO signal is the center frequency of the carrier carrying the RF transmit signal.

[0096] For example, assume that there are three downlink carriers, CC1, CC2 and CC3, each with a bandwidth of 100 MHz and center frequencies of 3.5 GHz, 3.6 GHz and 3.7 GHz. Figure 7 As shown, when the reference signal is sent in CC1, the center frequency of the local oscillator signal f TXRF When the reference signal is sent in CC2, the center frequency of the local oscillator signal is f TXRF When sending the reference signal in CC3, the center frequency of the local oscillator signal is 3.6GHz. TXRF It is 3.7GHz.

[0097] As can be seen from the above process, each time a terminal device sends a reference signal on a downlink carrier, it needs to relock the phase-locked loop (PLL) so that the local oscillator signal output by the PLL matches the center frequency of the downlink carrier. Therefore, when the terminal device sends a reference signal on a downlink carrier, it needs to temporarily suspend uplink transmission on the uplink carrier and switch to the downlink carrier to send the reference signal. After the reference signal is sent, it switches back to the configured uplink carrier to resume uplink transmission. This will cause uplink transmission in normal cells to be interrupted, significantly affecting the uplink rate. If the terminal device transmits reference signals on multiple downlink carriers in rotation, the impact on uplink transmission performance will be even more severe.

[0098] It should be noted that the network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field can know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0099] Combined with the previous description, such as Figure 8 The figure shows a flow chart of a communication method provided in an embodiment of the present application. Figure 8 In this article, the interaction between a network device and a terminal device is used as an example to illustrate that the operations performed by the network device can also be performed by a chip or module inside the network device, and the operations performed by the terminal device can also be performed by a chip or module inside the terminal device. Figure 8 , the method comprising:

[0100] S801: A terminal device obtains first configuration information from a network device, where the first configuration information is used to indicate sending an SRS in a first time period and in at least one downlink carrier.

[0101] It should be noted that the SRS may also be replaced by other types of uplink reference signals, such as a demodulation reference signal (DMRS), which is not limited in this embodiment of the present application.

[0102] In an embodiment of the present application, the network device may send the first configuration information in multiple ways. In one implementation, the network device may send the first configuration information via a radio resource control (RRC) message. The first configuration information may be a configuration parameter srs-configindex in the RRC message. The configuration parameter srs-configindex may indicate information such as the carrier and period for transmitting the SRS. The first configuration information may also indicate the timing of transmitting the SRS. The timing of transmitting the SRS may indicate information such as the symbol position and number of symbols occupied by the SRS in the carrier. The RRC message may be an RRC connection establishment message or an RRC connection reconfiguration message.

[0103] It should be noted that the first configuration information may directly indicate the first time period or indirectly indicate the first time period. For example, when the first configuration information indicates the period for sending SRS, the terminal device may determine the first time period according to the period in the first configuration information.

[0104] In another implementation, the network device may send downlink control information (DCI) including first configuration information to the terminal device, and the DCI may be used to trigger the terminal device to send the SRS. The first configuration information in the DCI may indicate a first time period and at least one downlink carrier.

[0105] It should be noted that the specific duration of the first time period is not limited in this application. For example, the first time period may include multiple uplink time slots or multiple OFDM symbols.

[0106] In this embodiment of the present application, at least one downlink carrier is configured by a network device. For example, a terminal device may obtain second configuration information from the network device, where the second configuration information is used to indicate the configuration of downlink continuous CA, where the downlink continuous CA includes the configuration of the at least one downlink carrier. The terminal device may receive downlink data or downlink control signaling on the at least one downlink carrier using the downlink continuous CA method.

[0107] It should be noted that the at least one downlink carrier is a PUSCH-less carrier. A terminal device can usually only receive downlink data or downlink control signaling and send uplink reference signals such as SRS in a PUSCH-less carrier.

[0108] In addition, in the first time period, the terminal device transmits SRS in turn in at least one downlink carrier, that is, the terminal device transmits SRS in only one downlink carrier at a time, and after completing the transmission in one downlink carrier, switches to another downlink carrier to transmit SRS.

[0109] For example, if Figure 9 As shown, it is a schematic diagram of an SRS round-trip transmission provided in an embodiment of the present application. Figure 9 Taking the first time period as a time slot as an example, the terminal device needs to send SRS on three carriers (carrier 1 to carrier 3). Figure 9 In the description, a time slot including 14 symbols (symbol 0 to symbol 13) is taken as an example. The terminal device needs to send SRS in each downlink carrier in the order of carrier 1 to carrier 3. The SRS in each downlink carrier occupies one symbol, and the symbols occupied are symbol 0, symbol 3, and symbol 6 respectively. Of course, optionally, the SRS in each downlink carrier can also occupy multiple symbols. For example, as an example, the SRS in each downlink carrier occupies two symbols, and the symbols occupied are symbols 0 and 1, symbols 4 and 5, and symbols 8 and 9 respectively.

[0110] In the embodiment of the present application, the at least one downlink carrier is located in the same frequency band and is a continuous carrier in the frequency domain.

[0111] The at least one downlink carrier may be timing aligned, that is, the same timing advance group (TAG), in which case the carrier rotation SRS and the normal PUSCH transmission timing are aligned; the at least one downlink carrier may also be timing non-aligned, that is, different TAGs, in which case the carrier rotation SRS and the normal PUSCH transmission timing are not aligned.

[0112] The network device may also configure at least one uplink carrier for the terminal device, and the terminal device may send an uplink signal to the network device via the at least one uplink carrier. The present application may be applied to a TDD mode, in which at least one downlink carrier and at least one uplink carrier are located in the same frequency band.

[0113] In the embodiment of the present application, at least one downlink carrier and at least one uplink carrier may both be located in frequency range 1 or frequency range 2 of the technical specification of 3GPP NR.

[0114] Further optionally, the frequency range of the at least one downlink carrier is continuous with the frequency range of the at least one uplink carrier in the frequency domain.

[0115] For example, a network device is configured with two downlink carriers at 3.5 GHz and 3.6 GHz, each with a bandwidth of 100 MHz. It is also configured with one uplink carrier at 3.7 GHz, each with a bandwidth of 100 MHz. These three carriers are continuous in the frequency domain and have adjacent frequencies.

[0116] S802: When configured to send an uplink signal in at least one uplink carrier within the first time period, the terminal device configures a transmission channel based on the CA mode, and sends an SRS in at least one downlink carrier through the transmission channel within the first time period, and sends an uplink signal in the at least one uplink carrier.

[0117] In an embodiment of the present application, if the terminal device still needs to transmit an uplink signal on at least one uplink carrier during the first time period, the terminal device may enable CA mode. When CA mode is enabled, the center frequency and bandwidth of the transmit channel configured based on the CA mode are determined based on the at least one downlink carrier and the at least one uplink carrier.

[0118] Specifically, the center frequency of the transmission channel configured based on the CA mode can be determined according to the frequency range of the at least one downlink carrier and the at least one uplink carrier. For example, the center frequency of the transmission channel can be equal to the average of the center frequency of the at least one downlink carrier and the center frequency of the at least one uplink carrier.

[0119] For example, at least one downlink carrier includes two downlink carriers, whose center frequencies are 3.5 GHz and 3.6 GHz respectively; at least one uplink carrier includes one uplink carrier, whose center frequency is 3.7 GHz, then the center frequency of the transmission channel configured based on the CA mode can be equal to 3.6 GHz.

[0120] In an embodiment of the present application, the bandwidth of the transmission channel configured based on the CA mode can be determined in multiple ways. In one implementation, the bandwidth of the transmission channel can be the sum of the bandwidth of the at least one downlink carrier and the bandwidth of the at least one uplink carrier.

[0121] For example, at least one downlink carrier includes two downlink carriers, both of which have a bandwidth of 100 MHz; at least one uplink carrier includes one uplink carrier, both of which have a bandwidth of 100 MHz, then the bandwidth of the transmission channel configured based on the CA mode can be equal to 300 MHz.

[0122] In another implementation, the bandwidth of the transmission channel can be configured to be the maximum bandwidth supported by the terminal device. For example, if the maximum bandwidth supported by the terminal device is 500 MHz, the bandwidth of the transmission channel can be configured to be 500 MHz.

[0123] It should be noted that, in this implementation, the center frequency of the transmission channel is also configured as the center frequency corresponding to the maximum bandwidth supported by the terminal device.

[0124] In CA mode, the center frequency and bandwidth of the terminal device's transmission channel are determined jointly by at least one downlink carrier that needs to send SRS and at least one uplink carrier that needs to send uplink signals. Therefore, the terminal device can simultaneously send SRS in one downlink carrier and uplink signals in another uplink carrier. This can avoid transmission interruption of the uplink signal being transmitted in the uplink carrier when sending SRS, thereby improving uplink efficiency.

[0125] When the terminal device does not need to send SRS in the downlink carrier, the CA mode can be turned off. For example, in the second time period, the terminal device is not configured to send SRS, but is configured to send uplink signals in an uplink carrier. At this time, in the second time period, the transmission channel can be configured based on the one uplink carrier, and the center frequency and bandwidth of the transmission channel of the terminal device are determined according to the one uplink carrier. For example, the center frequency of the one uplink carrier is 3.5GHz and the bandwidth is 100MHz; then the transmission channel can be configured to change its working bandwidth in the uplink to 100MHz and the center frequency to 3.5GHz.

[0126] The terminal device sends an uplink signal in the one uplink carrier through the transmission channel during the second time period. The specific content of the uplink signal is not limited in this application and will not be described here.

[0127] Furthermore, in an embodiment of the present application, the terminal device may also send feedback information to the network device, where the feedback information is used to indicate the configuration of the terminal device's transmit channel based on the CA mode within the first time period. The network device can thereby determine that, within the first time period, when the terminal device transmits an SRS in the downlink carrier, it will not interrupt the uplink signal in the uplink carrier, and thus can schedule the terminal device for uplink transmission within the first time period, thereby improving bandwidth utilization.

[0128] In combination with the above description, the above process is described below through a specific embodiment.

[0129] like Figure 10 As shown in the figure, assuming that in TDD mode, the network equipment configures two downlink carriers and one uplink carrier for the terminal device. The uplink carrier is CC1, and the two downlink carriers are CC2 and CC3. These two downlink carriers are PUSCH-less carriers. The center frequencies of CC1 to CC3 are 3.5 GHz, 3.6 GHz, and 3.7 GHz respectively. The bandwidth of each carrier is 100 MHz.

[0130] The network device instructs the terminal device to transmit SRS in CC2 and CC3 respectively during the first time period through the first configuration information. Assuming that the terminal device also needs to transmit uplink signals in CC1 during the first time period, the terminal device can enable the CA mode during the first time period, and the terminal device configures the transmission channel based on the CA mode.

[0131] Specifically, the uplink operating bandwidth of the transmitting channel of the terminal device is configured as the sum of the bandwidths of CC1, CC2, and CC3, that is, 300 MHz; the center frequency of the transmitting channel of the terminal device is configured as 3.6 GHz.

[0132] like Figure 10 As shown, the first time period includes multiple uplink time slots, and U represents the uplink time slot. During the first time period, the terminal device can simultaneously send an uplink signal in an uplink carrier and send an SRS through a downlink carrier. Specifically, in chronological order, the terminal device sends an SRS through CC2 in the first uplink time slot; sends an SRS through CC3 in the second uplink time slot; sends an SRS through CC2 in the third uplink time slot; and sends an SRS through CC3 in the fourth uplink time slot. While sending the SRS, the terminal device can also send an uplink signal through CC1 in each uplink time slot.

[0133] When the terminal device does not need to send SRS through the downlink carrier, the terminal device can turn off the CA mode. At this time, the uplink working bandwidth of the terminal device is changed to 100 MHz.

[0134] Through the above process, in CA mode, when the terminal device sends the reference signal in the downlink carrier, the uplink signal in the uplink carrier can continue to be sent, reducing data transmission interruption and data loss caused by carrier rotation.

[0135] In the embodiments provided in the present application, the methods provided in the embodiments of the present application are introduced from the perspective of interaction between various devices. In order to implement the various functions in the methods provided in the embodiments of the present application, the network device or terminal device may include a hardware structure and / or a software module to implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether a function of the above functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

[0136] The division of modules in the embodiments of the present application is illustrative and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in the various embodiments of the present application may be integrated into a single processor, or may exist physically separately, or two or more modules may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or software functional modules.

[0137] Same as above idea, Figure 11 As shown, an embodiment of the present application further provides an apparatus 1100 for implementing the functions of the network device or terminal device in the above method. For example, the apparatus may be a software module or a chip system. In the embodiment of the present application, the chip system may be composed of a chip, or may include a chip and other discrete components. The apparatus 1100 may include: a processing unit 1101 and a communication unit 1102.

[0138] In the embodiment of the present application, the communication unit may also be referred to as a transceiver unit, and may include a sending unit and / or a receiving unit, which are respectively used to execute the sending and receiving steps of the network device or terminal device in the above method embodiment.

[0139] The following, combined Figures 11 to 12 The communication device provided in the embodiment of the present application is described in detail. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment, so that the contents not described in detail can be referred to the method embodiment above, and for the sake of brevity, they are not repeated here.

[0140] A communication unit may also be referred to as a transceiver, transceiver, or transceiver device. A processing unit may also be referred to as a processor, processing board, processing module, or processing device. Optionally, the device in communication unit 1102 that implements the receiving function may be considered a receiving unit, and the device in communication unit 1102 that implements the transmitting function may be considered a transmitting unit. That is, communication unit 1102 includes both a receiving unit and a transmitting unit. A communication unit may also be referred to as a transceiver, transceiver, or transceiver circuit. A receiving unit may also be referred to as a receiver, receiver, or receiving circuit. A transmitting unit may also be referred to as a transmitter, transmitter, or transmitting circuit.

[0141] When the communication device 1100 performs the functions of the terminal device in the above embodiment:

[0142] A communication unit, configured to obtain first configuration information from a network device, where the first configuration information is used to instruct to send a sounding reference signal (SRS) in a first time period and in at least one downlink carrier;

[0143] a processing unit, configured to configure a transmission channel based on a carrier aggregation (CA) mode when an uplink signal is configured to be sent in at least one uplink carrier within the first time period;

[0144] The communication unit is configured to send an SRS in the at least one downlink carrier and an uplink signal in the at least one uplink carrier through the transmission channel during the first time period, wherein a center frequency and a bandwidth of the transmission channel configured based on the CA mode are jointly determined according to the at least one downlink carrier and the at least one uplink carrier.

[0145] In a possible implementation, the center frequency of the transmit channel configured based on the CA mode is equal to an average of a center frequency of the at least one downlink carrier and a center frequency of the at least one uplink carrier.

[0146] In a possible implementation, the bandwidth of the transmit channel configured based on the CA mode is the sum of the bandwidth of the at least one downlink carrier and the bandwidth of the at least one uplink carrier.

[0147] In a possible implementation, the communication unit is further configured to:

[0148] A transmission channel is configured based on an uplink carrier, and an uplink signal is sent in the uplink carrier through the transmission channel during a second time period; wherein the second time period is not configured to send SRS, and the center frequency and bandwidth of the transmission channel are determined according to the uplink carrier.

[0149] In a possible implementation, before obtaining the first configuration information, the communication unit is further configured to:

[0150] Acquire second configuration information from the network device, where the second configuration information is used to indicate a configuration of downlink continuous CA, wherein the downlink continuous CA includes a configuration of the at least one downlink carrier.

[0151] In one possible implementation, the communication unit is specifically configured to:

[0152] Obtain a radio resource control RRC message from the network device, where the RRC message includes the first configuration information; the RRC message is an RRC connection establishment message or an RRC connection reconfiguration message.

[0153] In a possible implementation manner, the at least one downlink carrier and the at least one uplink carrier are time division duplex (TDD) carriers.

[0154] In a possible implementation manner, a frequency range of the at least one downlink carrier and a frequency range of the at least one uplink carrier are continuous in the frequency domain.

[0155] In a possible implementation, the communication unit is further configured to:

[0156] Send feedback information to the network device, where the feedback information is used to indicate that the transmission channel is configured based on the CA mode within the first time period.

[0157] like Figure 12 The device 1200 provided in an embodiment of the present application is shown. Figure 12 The device shown can be Figure 11 The communication device can be applied to the flowchart shown above to perform the functions of the terminal device or network device in the above method embodiment. Figure 12 Only the main components of the communication device are shown.

[0158] like Figure 12 As shown, communication device 1200 includes a processor 1210 and an interface circuit 1220. Processor 1210 and interface circuit 1220 are coupled to each other. It will be appreciated that interface circuit 1220 may be a transceiver or an input / output interface. Optionally, communication device 1200 may further include a memory 1230 for storing instructions executed by processor 1210, input data required by processor 1210 to execute instructions, or data generated after processor 1210 executes instructions.

[0159] When the communication device 1200 is used to implement Figure 8When implementing the method shown, the processor 1210 is used to implement the functions of the processing unit 1101, and the interface circuit 1220 is used to implement the functions of the communication unit 1102.

[0160] When the communication device is a chip used in a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiments. The terminal device chip receives information from other modules in the terminal device (such as a radio frequency module or antenna), and the information is sent by the network device to the terminal device; or the terminal device chip sends information to other modules in the terminal device (such as a radio frequency module or antenna), and the information is sent by the terminal device to the network device.

[0161] When the communication device is a chip used in a network device, the network device chip implements the network device functions of the above method embodiments. The network device chip receives information from other modules in the network device (such as a radio frequency module or antenna), and the information is sent by the terminal device to the network device; or the network device chip sends information to other modules in the network device (such as a radio frequency module or antenna), and the information is sent by the network device to the terminal device.

[0162] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0163] In the embodiments of the present application, the processor can be a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a register, a hard disk, a mobile hard disk, a CD-ROM, or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a network device or a terminal device. Of course, the processor and the storage medium can also exist in a network device or a terminal device as discrete components.

[0164] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, optical storage, etc.) that contain computer-usable program code.

[0165] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0166] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0167] Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: include: Acquire first configuration information from a network device, where the first configuration information is used to instruct sending a sounding reference signal (SRS) in a first time period and in at least one downlink carrier; When configured to send an uplink signal in at least one uplink carrier within the first time period, a transmission channel is configured based on a carrier aggregation (CA) mode, and an SRS is sent in the at least one downlink carrier and an uplink signal is sent in the at least one uplink carrier through the transmission channel within the first time period, wherein a center frequency and a bandwidth of the transmission channel configured based on the CA mode are jointly determined based on the at least one downlink carrier and the at least one uplink carrier.

2. The method according to claim 1, characterized in that The center frequency of the transmit channel configured based on the CA mode is equal to an average of a center frequency of the at least one downlink carrier and a center frequency of the at least one uplink carrier.

3. The method according to claim 1 or 2, characterized in that The bandwidth of the transmission channel configured based on the CA mode is the sum of the bandwidth of the at least one downlink carrier and the bandwidth of the at least one uplink carrier.

4. The method according to claim 1 or 2, characterized in that The method further comprises: A transmission channel is configured based on an uplink carrier, and an uplink signal is sent in the uplink carrier through the transmission channel during a second time period; wherein the second time period is not configured to send SRS, and the center frequency and bandwidth of the transmission channel are determined according to the uplink carrier.

5. The method according to claim 1 or 2, characterized in that Before acquiring the first configuration information, the method further includes: Acquire second configuration information from the network device, where the second configuration information is used to indicate a configuration of downlink continuous CA, wherein the downlink continuous CA includes a configuration of the at least one downlink carrier.

6. The method according to claim 1 or 2, characterized in that The obtaining of first configuration information from the network device includes: Obtain a radio resource control RRC message from the network device, where the RRC message includes the first configuration information; the RRC message is an RRC connection establishment message or an RRC connection reconfiguration message.

7. The method according to claim 1 or 2, characterized in that The at least one downlink carrier and the at least one uplink carrier are time division duplex (TDD) carriers.

8. The method according to claim 1 or 2, characterized in that The frequency range of the at least one downlink carrier is continuous with the frequency range of the at least one uplink carrier in the frequency domain.

9. The method according to claim 1 or 2, characterized in that The method further comprises: Send feedback information to the network device, where the feedback information is used to indicate that the transmission channel is configured based on the CA mode within the first time period.

10. A communication device, characterized in that: include: A communication unit, configured to obtain first configuration information from a network device, where the first configuration information is used to instruct to send a sounding reference signal (SRS) in a first time period and in at least one downlink carrier; a processing unit, configured to configure a transmission channel based on a carrier aggregation (CA) mode when an uplink signal is configured to be sent in at least one uplink carrier within the first time period; The communication unit is configured to send an SRS in the at least one downlink carrier and an uplink signal in the at least one uplink carrier through the transmission channel during the first time period, wherein a center frequency and a bandwidth of the transmission channel configured based on the CA mode are jointly determined according to the at least one downlink carrier and the at least one uplink carrier.

11. The device according to claim 10, characterized in that The center frequency of the transmit channel configured based on the CA mode is equal to an average of a center frequency of the at least one downlink carrier and a center frequency of the at least one uplink carrier.

12. The device according to claim 10 or 11, characterized in that The bandwidth of the transmission channel configured based on the CA mode is the sum of the bandwidth of the at least one downlink carrier and the bandwidth of the at least one uplink carrier.

13. The device according to claim 10 or 11, characterized in that The communication unit is further configured to: A transmission channel is configured based on an uplink carrier, and an uplink signal is sent in the uplink carrier through the transmission channel during a second time period; wherein the second time period is not configured to send SRS, and the center frequency and bandwidth of the transmission channel are determined according to the uplink carrier.

14. The device according to claim 10 or 11, characterized in that Before acquiring the first configuration information, the communication unit is further configured to: Acquire second configuration information from the network device, where the second configuration information is used to indicate a configuration of downlink continuous CA, wherein the downlink continuous CA includes a configuration of the at least one downlink carrier.

15. The device according to claim 10 or 11, characterized in that The communication unit is specifically used for: Obtain a radio resource control RRC message from the network device, where the RRC message includes the first configuration information; the RRC message is an RRC connection establishment message or an RRC connection reconfiguration message.

16. The device according to claim 10 or 11, characterized in that The at least one downlink carrier and the at least one uplink carrier are time division duplex (TDD) carriers.

17. The device according to claim 10 or 11, characterized in that The frequency range of the at least one downlink carrier is continuous with the frequency range of the at least one uplink carrier in the frequency domain.

18. The device according to claim 10 or 11, characterized in that The communication unit is further configured to: Feedback information is sent to the network device, where the feedback information is used to indicate that the transmission channel is configured based on the CA mode within the first time period.

19. A communication device, characterized in that: include: A memory and a processor, wherein the memory is used to store computer programs or instructions, and the processor is used to execute the computer programs or instructions stored in the memory; When the processor executes the computer program or instructions, the method according to any one of claims 1 to 9 is performed.

20. A computer-readable storage medium, characterized in that Computer-readable instructions are stored therein, and when a communication device reads and executes the computer-readable instructions, the communication device is caused to execute the method according to any one of claims 1 to 9.

21. A computer program product, characterized in that Computer-readable instructions are stored therein, and when a communication device reads and executes the computer-readable instructions, the communication device executes the method according to any one of claims 1 to 9.

22. A chip, characterized in that: The method comprises a processor coupled to a memory and configured to execute a computer program or instructions stored in the memory. When the processor executes the computer program or instructions, the method according to any one of claims 1 to 9 is performed.

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