Communication method and communication apparatus

Abstract

The present application provides a communication method and a communication apparatus. According to the method, BWPs in a same link direction as carriers are configured for a terminal device, and simultaneous activation of a plurality of BWPs is allowed, such that the utilization efficiency of frequency resources can be improved, thereby increasing the data transmission rate of the terminal device and improving the uplink and downlink transmission performance of the terminal device.

Description

Communication method and communication device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on November 28, 2023, with application number 202311615508.8 and invention name "A Communication Method and Communication Device", the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of wireless communication technology, and in particular to a communication method and a communication device. Background Art

[0004] To support devices with different bandwidth capabilities and to consider energy conservation, New Radio (NR) introduces the concept of a bandwidth part (BWP). A BWP is a continuous segment of frequency domain resources, including uplink BWP and downlink BWP, used for uplink and downlink transmissions, respectively.

[0005] The current NR protocol defines that uplink transmissions are performed entirely within the uplink BWP, and downlink transmissions are performed entirely within the downlink BWP. If a terminal device receives multiple BWP configurations, it can only operate on one of the BWPs at a time. This BWP is called the active BWP.

[0006] The above-mentioned BWP configuration method limits the maximum transmission rate of the terminal device, resulting in poor uplink and downlink transmission performance of the terminal device. Summary of the Invention

[0007] The embodiments of the present application provide a communication method and a communication device for improving the uplink and downlink transmission performance of a terminal device.

[0008] In a first aspect, an embodiment of the present application provides a communication method, which can be performed by a network device or a module (such as a chip) in the network device. The method includes: sending first configuration information to a terminal device, the first configuration information being used to configure a first carrier and a second carrier for the terminal device; sending second configuration information to the terminal device, the second configuration information being used to configure X BWPs for the terminal device, where X is an integer greater than 1; wherein the first carrier, the second carrier, and the X BWPs have the same link direction, the first carrier is located in a first sub-band of a first frequency band, the second carrier is located in a second sub-band of the first frequency band, and the first sub-band is discontinuous with the second sub-band; M of the X BWPs are located in the first carrier, and the other XM of the X BWPs are located in the second carrier; and N of the X BWPs are activated simultaneously, where M is a positive integer, XM is a positive integer, and N is an integer greater than 1.

[0009] The above solution configures a BWP in the same link direction as the carrier for the terminal device and allows multiple BWPs to be activated at the same time, thereby improving the efficiency of frequency resource utilization, increasing the data transmission rate of the terminal device, and improving the uplink and downlink transmission performance of the terminal device.

[0010] In a possible implementation method, some of the N BWPs are located in the first carrier, and another part is located in the second carrier.

[0011] The above scheme can enable the terminal device to flexibly use two non-continuous sub-bands of a frequency band for transmission in the same link direction. In particular, when the first frequency band is the FDD frequency band, it can enable the terminal device to use two sub-bands with different link directions to simultaneously transmit in the same link direction.

[0012] In a possible implementation method, the identifier of each of the X BWPs includes a first part and a second part, the first parts of the identifiers of the X BWPs are the same, and the second parts of the identifiers of the X BWPs are different from each other.

[0013] In the above scheme, the identifiers of the configured X BWPs all include the first part and the second part, and the first part of the identifiers of the X BWPs are the same, so that the association between the X BWPs can be achieved. In this way, there is no need to associate the X BWPs through new signaling, thereby reducing signaling overhead.

[0014] In a possible implementation method, the method further includes: sending downlink control information (DCI) to the terminal device, where the DCI is used to activate the N BWPs.

[0015] The above solution activates N BWPs through DCI, which can realize dynamic activation of BWPs and increase the flexibility of the solution.

[0016] In a possible implementation method, the BWP indication field of the DCI includes a first field and a second field, the first field is used to indicate a first part of the identifiers of the N BWPs, and the second field is used to indicate a second part of the identifiers of the N BWPs.

[0017] Among them, since the N BWP identifiers contain the same first part, the first field only needs to indicate one first part, and different BWP identifiers contain different second parts, so the second field needs to indicate the second part of each BWP identifier in the N BWP identifiers.

[0018] In one possible implementation method, the second field includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

[0019] In a possible implementation method, the second field includes the second part of the identifiers of the N BWPs.

[0020] In a possible implementation method, the DCI includes a first BWP indication field and a second BWP indication field, the first BWP indication field is used to indicate a first part of the identifiers of the N BWPs, and the second BWP indication field is used to indicate a second part of the identifiers of the N BWPs.

[0021] Among them, since the N BWP identifiers contain the same first part, the first BWP indication field only needs to indicate one first part, and different BWP identifiers contain different second parts, so the second BWP indication field needs to indicate the second part of each BWP identifier in the N BWP identifiers.

[0022] In one possible implementation method, the second BWP indication field includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, and the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

[0023] In the above solution, the BWP is activated by associating X bits with X BWPs, so that fewer bits are used to indicate the activated BWP, thereby reducing signaling overhead.

[0024] In a possible implementation method, the second BWP indication field includes the second part of the identifiers of the N BWPs.

[0025] The above solution indicates the activated BWP by carrying the BWP identifier, which can achieve the use of fewer bits to indicate the activated BWP when X is large and N is small, thereby reducing signaling overhead.

[0026] In one possible implementation method, the method further includes: sending first signaling and DCI to the terminal device, wherein the first signaling is used to indicate the first part of the identifier of the N BWPs in the X BPWs, and the DCI is used to indicate the second part of the identifier of the N BWPs, and the first signaling is radio resource control (RRC) signaling, system information block (SIB), master information block (MIB) or medium access control control element (MAC CE).

[0027] In a possible implementation method, each of the X BWPs has a unique identifier.

[0028] In a possible implementation method, the method further includes: sending DCI to the terminal device, where the DCI is used to activate the N BWPs.

[0029] The above solution activates N BWPs through DCI, which can realize dynamic activation of BWPs and increase the flexibility of the solution.

[0030] In a possible implementation method, the DCI includes N BWP indication fields, and each of the N BWP indication fields is used to indicate an identifier of a BWP among the N BWPs.

[0031] In one possible implementation method, the DCI includes a BWP indication field, the BWP indication field includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

[0032] In the above solution, the BWP is activated by associating X bits with X BWPs, so that fewer bits are used to indicate the activated BWP, thereby reducing signaling overhead.

[0033] In a possible implementation method, the DCI includes a BWP indication field, and the BWP indication field includes identifiers of the N BWPs.

[0034] The above solution indicates the activated BWP by carrying the BWP identifier, which can achieve the use of fewer bits to indicate the activated BWP when X is large and N is small, thereby reducing signaling overhead.

[0035] In a second aspect, an embodiment of the present application provides a communication method, which can be executed by a terminal device or a module (such as a chip) in the terminal device. The method includes: receiving first configuration information from a network device, the first configuration information being used to configure a first carrier and a second carrier for the terminal device; receiving second configuration information from the network device, the second configuration information being used to configure X BWPs for the terminal device, where X is an integer greater than 1; wherein the first carrier, the second carrier, and the X BWPs have the same link direction, the first carrier is located in a first sub-band of a first frequency band, the second carrier is located in a second sub-band of the first frequency band, and the first sub-band is discontinuous with the second sub-band; M of the X BWPs are located in the first carrier, and the other XM of the X BWPs are located in the second carrier; and N of the X BWPs are activated simultaneously, where M is a positive integer, XM is a positive integer, and N is an integer greater than 1.

[0036] The above solution configures a BWP in the same link direction as the carrier for the terminal device and allows multiple BWPs to be activated at the same time, thereby improving the efficiency of frequency resource utilization, increasing the data transmission rate of the terminal device, and improving the uplink and downlink transmission performance of the terminal device.

[0037] In a possible implementation method, some of the multiple BWPs are located in the first carrier, and another part is located in the second carrier.

[0038] The above solution can flexibly configure the frequency domain position of BWP.

[0039] In a possible implementation method, the identifier of each of the X BWPs includes a first part and a second part, the first parts of the identifiers of the X BWPs are the same, and the second parts of the identifiers of the X BWPs are different from each other.

[0040] In a possible implementation method, the method further includes: receiving DCI from the network device, where the DCI is used to activate the N BWPs.

[0041] The above solution activates N BWPs through DCI, which can realize dynamic activation of BWPs and increase the flexibility of the solution.

[0042] In a possible implementation method, the BWP indication field of the DCI includes a first field and a second field, the first field is used to indicate a first part of the identifiers of the N BWPs, and the second field is used to indicate a second part of the identifiers of the N BWPs.

[0043] Among them, since the N BWP identifiers contain the same first part, the first field only needs to indicate one first part, and different BWP identifiers contain different second parts, so the second field needs to indicate the second part of each BWP identifier in the N BWP identifiers.

[0044] In one possible implementation method, the second field includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

[0045] In the above solution, the BWP is activated by associating X bits with X BWPs, so that fewer bits are used to indicate the activated BWP, thereby reducing signaling overhead.

[0046] In a possible implementation method, the second field includes the second part of the identifiers of the N BWPs.

[0047] The above solution indicates the activated BWP by carrying the BWP identifier, which can achieve the use of fewer bits to indicate the activated BWP when X is large and N is small, thereby reducing signaling overhead.

[0048] In a possible implementation method, the DCI includes a first BWP indication field and a second BWP indication field, the first BWP indication field is used to indicate a first part of the identifiers of the N BWPs, and the second BWP indication field is used to indicate a second part of the identifiers of the N BWPs.

[0049] Among them, since the N BWP identifiers contain the same first part, the first BWP indication field only needs to indicate one first part, and different BWP identifiers contain different second parts, so the second BWP indication field needs to indicate the second part of each BWP identifier in the N BWP identifiers.

[0050] In one possible implementation method, the second BWP indication field includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, and the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

[0051] In the above solution, the BWP is activated by associating X bits with X BWPs, so that fewer bits are used to indicate the activated BWP, thereby reducing signaling overhead.

[0052] In a possible implementation method, the second BWP indication field includes the second part of the identifiers of the N BWPs.

[0053] The above solution indicates the activated BWP by carrying the BWP identifier, which can achieve the use of fewer bits to indicate the activated BWP when X is large and N is small, thereby reducing signaling overhead.

[0054] In one possible implementation method, the method further includes: receiving first signaling and DCI from the network device, wherein the first signaling is used to indicate a first part of an identifier of N BWPs among the X BPWs, and the DCI is used to indicate a second part of an identifier of the N BWPs, and the first signaling is RRC signaling, SIB, MIB, or MAC CE.

[0055] In a possible implementation method, each of the X BWPs has a unique identifier.

[0056] In a possible implementation method, the method further includes: receiving DCI from the network device, where the DCI is used to activate the N BWPs.

[0057] The above solution activates N BWPs through DCI, which can realize dynamic activation of BWPs and increase the flexibility of the solution.

[0058] In a possible implementation method, the DCI includes N BWP indication fields, and each of the N BWP indication fields is used to indicate an identifier of a BWP among the N BWPs.

[0059] In one possible implementation method, the DCI includes a BWP indication field, the BWP indication field includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

[0060] In the above solution, the BWP is activated by associating X bits with X BWPs, so that fewer bits are used to indicate the activated BWP, thereby reducing signaling overhead.

[0061] In a possible implementation method, the DCI includes a BWP indication field, and the BWP indication field includes identifiers of the N BWPs.

[0062] The above solution indicates the activated BWP by carrying the BWP identifier, which can achieve the use of fewer bits to indicate the activated BWP when X is large and N is small, thereby reducing signaling overhead.

[0063] Any implementation method based on the first or second aspect above:

[0064] In a possible implementation method, some or all of the following parameters of the X BWPs are the same: BWP frequency resource parameters, channel parameters, or signal parameters.

[0065] The above solution has the following advantages: first, signaling overhead can be reduced when configuring parameters; second, the memory specifications and implementation complexity of the terminal device can be reduced; third, when the X BWPs are switched between each other, the switching delay can be reduced due to the presence of common parameters.

[0066] In one possible implementation method, the channel includes one or more of the following: a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), a physical uplink shared channel (PUSCH), a physical random access channel (PRACH) or a physical uplink control channel (PUCCH); the signal includes one or more of the following: a demodulation reference signal (DMRS) of PDSCH, a DMRS of PDCCH, a DMRS of PUSCH, a DMRS of PUCCH, a phase tracking reference signal (PTRS) of PDSCH, a PTRS of PUSCH, a channel state information-reference signal (CSI-RS), a tracking reference signal (TRS), a sounding reference signal (SRS) or a synchronization signal block (SSB).

[0067] In one possible implementation method, the switching delay between the X BWPs is less than a first threshold; wherein, when the subcarrier spacing is 15 kHz, the first threshold is equal to the length of 1 time slot or the length of 3 time slots; when the subcarrier spacing is 30 kHz, the first threshold is equal to the length of 2 time slots or the length of 5 time slots; when the subcarrier spacing is 60 kHz, the first threshold is equal to the length of 3 time slots or the length of 9 time slots; when the subcarrier spacing is 120 kHz, the first threshold is equal to the length of 6 time slots or the length of 18 time slots.

[0068] In the above solution, when the X BWPs switch to each other, the switching delay will be shorter than the switching delay between BWPs in the existing protocol, that is, the switching delay can be reduced.

[0069] In a third aspect, an embodiment of the present application provides a communication method, which can be executed by a network device or a module (such as a chip) in the network device. The method includes: sending first configuration information to a terminal device, the first configuration information is used to configure a first carrier and a second carrier for the terminal device; sending second configuration information to the terminal device, the second configuration information is used to configure X BWPs for the terminal device, where X is a positive integer; wherein the link direction of the first carrier, the second carrier, and the X BWPs are the same, the first carrier is located in the first sub-band of the first frequency band, the second carrier is located in the second sub-band of the first frequency band, and the first sub-band is discontinuous with the second sub-band; the X BWPs include a first BWP, the frequency resources of the first BWP are continuous, and overlap with both the first carrier and the second carrier; N of the X BWPs are activated simultaneously, where N is an integer greater than 1.

[0070] The above solution configures a BWP in the same link direction as the carrier for the terminal device and allows multiple BWPs to be activated at the same time, thereby improving the efficiency of frequency resource utilization, increasing the data transmission rate of the terminal device, and improving the uplink and downlink transmission performance of the terminal device.

[0071] In a fourth aspect, an embodiment of the present application provides a communication method, which can be executed by a terminal device or a module (such as a chip) in the terminal device. The method includes: receiving first configuration information from a network device, the first configuration information being used to configure a first carrier and a second carrier for the terminal device; receiving second configuration information from the network device, the second configuration information being used to configure X BWPs for the terminal device, where X is a positive integer; wherein the link directions of the first carrier, the second carrier, and the X BWPs are the same, the first carrier is located in the first sub-band of the first frequency band, the second carrier is located in the second sub-band of the first frequency band, and the first sub-band is discontinuous with the second sub-band; the X BWPs include a first BWP, the frequency resources of the first BWP are continuous, and overlap with both the first carrier and the second carrier; N of the X BWPs are activated simultaneously, where N is an integer greater than 1.

[0072] The above solution configures a BWP in the same link direction as the carrier for the terminal device and allows multiple BWPs to be activated at the same time, thereby improving the efficiency of frequency resource utilization, increasing the data transmission rate of the terminal device, and improving the uplink and downlink transmission performance of the terminal device.

[0073] Based on the third or fourth aspect above:

[0074] In a possible implementation method, a frequency domain starting position of the first BWP is located within a carrier with a lower frequency position between the first carrier and the second carrier.

[0075] In a possible implementation method, the second configuration information includes indication information, where the indication information is used to indicate the carrier where the frequency domain starting position of the first BWP is located.

[0076] The above solution explicitly indicates the carrier where the frequency domain starting position of the first BWP is located through indication information, which can increase the accuracy of the indication.

[0077] In a possible implementation method, the second configuration information includes the intra-carrier offset of the first BWP and the bandwidth size of the first BWP.

[0078] In the above solution, the second configuration information explicitly carries the intra-carrier offset of the first BWP and the bandwidth size of the first BWP, which can improve the accuracy of the configuration.

[0079] In one possible implementation method, the second configuration information includes a resource indicator value (RIV) and a first parameter value, the RIV and the first parameter are used to determine the intra-carrier offset of the first BWP and the bandwidth size of the first BWP, and the first parameter is not less than the size of the frequency resource range occupied by the first carrier and the second carrier.

[0080] In the above scheme, the second configuration information carries configuration parameters (i.e., RIV and the first parameter) that can be used to determine the intra-carrier offset of the first BWP and the bandwidth size of the first BWP. Since the RIV and the first parameter occupy fewer bits, the signaling overhead can be reduced.

[0081] In one possible implementation method, only the valid resources within the first BWP can be used for data transmission, and the valid resources within the first BWP refer to the overlapping part of the frequency resources of the first BWP and the frequency resources of the first carrier and / or the second carrier, and the valid resources within the first BWP include the first valid resources located on the first carrier and / or the second valid resources located on the second carrier.

[0082] In a possible implementation method, the physical resource blocks (PRBs) within the first BWP are numbered consecutively; or the PRBs within the valid resources of the first BWP are numbered consecutively.

[0083] In a possible implementation method, the size of a resource block group (RBG) is determined according to the number of PRBs included in the valid resources within the first BWP.

[0084] In a possible implementation method, a first precoding codebook is used for PDSCH transmission or PUSCH transmission in the first valid resources, and a second precoding codebook is used in the second valid resources.

[0085] In one possible implementation method, a first resource is used within the first valid resource for downlink measurement and / or a second resource is used for measurement reporting, and a third resource is used within the second valid resource for downlink measurement and / or a fourth resource is used for measurement reporting; wherein, the first resource is different from the third resource.

[0086] The above solution independently performs downlink measurement and reporting in different effective resources, which can increase the flexibility and accuracy of measurement and reporting.

[0087] In a possible implementation method, a fifth resource is used within the first effective resource to perform uplink measurement, and a sixth resource is used within the second effective resource to perform uplink measurement; wherein the fifth resource is different from the sixth resource.

[0088] The above solution independently performs uplink measurement in different effective resources, which can increase the flexibility and accuracy of the measurement.

[0089] In a fifth aspect, an embodiment of the present application provides a communication device, which can be a network device or a module (such as a chip) in a network device. The device has the function of implementing any implementation method of the first or third aspect above. The function can be implemented by hardware or by hardware executing corresponding software implementation. The hardware or software includes one or more modules corresponding to the above functions.

[0090] In a sixth aspect, an embodiment of the present application provides a communication device, which may be a terminal device or a module (such as a chip) in the terminal device. The device has the function of implementing any implementation method of the second or fourth aspects above. The function can be implemented by hardware or by executing corresponding software implementation by hardware. The hardware or software includes one or more modules corresponding to the above functions.

[0091] In a seventh aspect, an embodiment of the present application provides a communication device, comprising a unit or means for executing each step of any implementation method in the above-mentioned first to fourth aspects.

[0092] In an eighth aspect, an embodiment of the present application provides a communication device, comprising a processor and an interface circuit, wherein the processor is configured to communicate with other devices via the interface circuit and execute any of the implementation methods described in the first to fourth aspects. The processor comprises one or more.

[0093] Optionally, the communication device may further include a memory for storing computer instructions, the memory being coupled to a processor, and the processor executing the computer instructions stored in the memory so that the device executes any implementation method in the above-mentioned first to fourth aspects.

[0094] In the ninth aspect, an embodiment of the present application further provides a computer program product, which includes a computer program or instructions. When the computer program or instructions are run by a communication device, any implementation method in the above-mentioned first to fourth aspects is executed.

[0095] In the tenth aspect, an embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores instructions, which, when run on a communication device, enables any implementation method in the above-mentioned first to fourth aspects to be executed.

[0096] In the eleventh aspect, an embodiment of the present application further provides a chip system, comprising: a processor for executing any implementation method in the above-mentioned first to fourth aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0097] FIG1( a ) is a schematic diagram of the architecture of a communication system used in an embodiment of the present application;

[0098] Figure 1(b) shows a schematic diagram of a network device;

[0099] Figure 2 is an example diagram of TDD;

[0100] FIG3 is an example diagram of full-duplex TDD;

[0101] FIG4 is an example diagram of half-duplex TDD;

[0102] FIG5 is an example diagram of a reconstruction scheme for FDD spectrum;

[0103] FIG6 is another example diagram of a reconstruction scheme for FDD spectrum;

[0104] FIG7 is a schematic diagram of uplink and downlink BWP configuration for FDD frequency;

[0105] FIG8 is a schematic diagram of uplink and downlink BWP configurations for TDD frequencies;

[0106] FIG9 is an example diagram of configuring BWP on FDD spectrum;

[0107] FIG10 is a flow chart of a communication method provided in an embodiment of the present application;

[0108] FIG11 is an example diagram of a BWP configuration provided in an embodiment of the present application;

[0109] FIG12 is an example diagram of a BWP configuration provided in an embodiment of the present application;

[0110] FIG13 is an example of the first BWP;

[0111] FIG14 is an example of a first BWP;

[0112] FIG15 is an example of the first BWP;

[0113] FIG16 is an example of a first valid resource and a second valid resource;

[0114] FIG17 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0115] FIG18 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0116] Figure 1(a) is a schematic diagram of the architecture of a communication system used in an embodiment of the present application. The communication system shown in Figure 1(a) includes a wireless access network 100 and a core network 200. Optionally, the communication system also includes the Internet 300. The wireless access network 100 may include at least one network device (such as 110a and 110b in Figure 1(a)) and may also include at least one terminal device (such as 120a-120j in Figure 1(a)). The terminal device is connected to the network device wirelessly, and the network device is connected to the core network wirelessly or by wire. The core network device and the network device may be independent and distinct physical devices, or the functions of the core network device and the logical functions of the network device may be integrated into the same physical device, or a physical device may integrate some of the functions of the core network device and some of the functions of the network device. Terminal devices and network devices may be connected to each other via wired or wireless connections. Figure 1(a) is merely a schematic diagram. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in Figure 1(a).

[0117] A network device is an access device that a terminal device uses to access a communication system via a wired or wireless method. A network device may be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a fifth generation (5G) mobile communication system, a next generation base station in a sixth generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system; it may also be a module or unit that performs some of the functions of a base station, for example, a centralized unit (CU), a distributed unit (DU), or a radio unit (RU). A network device may be a macro base station (such as 110a in FIG1(a)), a micro base station or an indoor station (such as 110b in FIG1(a)), a relay node or a donor node, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0118] A terminal device is a device with wireless transceiver capabilities that can send signals to or receive signals from a network device. Terminal devices include but are not limited to terminal devices, terminals, user equipment (UE), mobile stations, mobile terminals, etc. Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, etc. The terminal device can specifically be a mobile phone, tablet computer, computer with wireless transceiver capabilities, wearable device, vehicle, aircraft, ship, robot, robotic arm, smart home device, etc. The embodiments of this application do not limit the specific technology and specific device form adopted by the terminal device.

[0119] Network devices and terminal devices can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons, and artificial satellites. The embodiments of this application do not limit the application scenarios of network devices and terminal devices.

[0120] The roles of network devices and terminal devices can be relative. For example, the helicopter or drone 120i in Figure 1(a) can be configured as a mobile network device. For terminal devices 120j that access the wireless access network 100 via 120i, terminal device 120i is a network device. However, for network device 110a, 120i is a terminal device, meaning that communication between 110a and 120i occurs via a wireless air interface protocol. Of course, communication between 110a and 120i can also occur via an interface protocol between network devices. In this case, relative to 110a, 120i is also a network device. Therefore, both network devices and terminal devices can be collectively referred to as communication devices. 110a and 110b in Figure 1(a) can be referred to as communication devices with network device functionality, and 120a-120j in Figure 1(a) can be referred to as communication devices with terminal device functionality.

[0121] Network devices and terminal devices, network devices and network devices, and terminal devices and terminal devices can communicate through authorized spectrum, unauthorized spectrum, or both; can communicate through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz simultaneously. The embodiments of the present application do not limit the spectrum resources used for wireless communications.

[0122] In the embodiments of the present application, the functions of the network device may also be performed by a module (such as a chip) in the network device, or by a control subsystem that includes the network device functions. The control subsystem that includes the network device functions here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, intelligent transportation, and smart city. The functions of the terminal device may also be performed by a module (such as a chip) in the terminal device, or by a device that includes the terminal device functions.

[0123] In this application, a network device sends downlink signals or downlink information to a terminal device, and the downlink information is carried on a downlink channel. A terminal device sends uplink signals or uplink information to a network device, and the uplink information is carried on an uplink channel. To communicate with a network device, a terminal device needs to establish a wireless connection with a cell controlled by the network device. The cell with which a terminal device has established a wireless connection is called the serving cell of the terminal device.

[0124] Figure 1(b) shows a schematic diagram of a network device. As shown in Figure 1(b), the network device includes one or more CUs, one or more DUs, and one or more RUs. For clarity, Figure 1(b) shows only one CU, DU, and RU. The CU is connected to the core network and one or more DUs. Optionally, the CU may have some of the core network's functionality. The CU may include a CU-control plane (CP) and a CU-user plane (UP).

[0125] The CU and DU can be configured according to the protocol layer functions of the wireless network they implement: for example, the CU is configured to implement the functions of the packet data convergence protocol (PDCP) layer and the protocol layers above it (such as the radio resource control (RRC) layer and / or the service data adaptation protocol (SDAP) layer, etc.); the DU is configured to implement the functions of the protocol layers below the PDCP layer (such as the radio link control (RLC) layer, the medium access control (MAC) layer, and / or the physical (PHY) layer, etc.). For another example, the CU is configured to implement the functions of the protocol layers above the PDCP layer (such as the RRC layer and / or the SDAP layer), and the DU is configured to implement the functions of the PDCP layer and the protocol layers below it (such as the RLC layer, the MAC layer, and / or the PHY layer, etc.).

[0126] The above configuration of CU and DU is only an example, and the functions of CU and DU can also be configured as needed. For example, the CU or DU can be configured to have the functions of more protocol layers, or the CU or DU can be configured to have partial processing functions of the protocol layer. For example, some functions of the RLC layer and the functions of the protocol layers above the RLC layer are set in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are set in the DU. For another example, the functions of the CU or DU can be divided according to the service type or other system requirements, such as by delay, and the functions whose processing time needs to meet the smaller delay requirement are set in the DU, and the functions that do not need to meet the delay requirement are set in the CU.

[0127] The DU and RU can work together to implement the functions of the PHY layer. A DU can be connected to one or more RUs. The functions of the DU and RU can be configured in various ways according to the design. For example, the DU is configured to implement the baseband function, and the RU is configured to implement the mid-RF function. For another example, the DU is configured to implement the high-layer functions in the PHY layer, and the RU is configured to implement the low-layer functions in the PHY layer or to implement the low-layer functions and the RF functions. The high-layer functions in the physical layer may include a part of the functions of the physical layer, which is closer to the MAC layer, and the low-layer functions in the physical layer may include another part of the functions of the physical layer, which is closer to the mid-RF side.

[0128] The CU and DU may be set separately, or may be included in the same network element, such as a baseband unit (BBU). The RU may be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU) or a remote radio head (RRH). In different systems, CU, DU or RU may have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (open CU), DU may also be called O-DU, and RU may also be called O-RU. Any of the CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0129] To facilitate understanding of the present invention, the background of the present invention is first introduced below.

[0130] 1. Time division duplex (TDD) and frequency division duplex (FDD)

[0131] Currently, new radio (NR) supports TDD and FDD, based on the separation of uplink and downlink transmissions in time and / or frequency.

[0132] TDD means that uplink and downlink transmissions use the same frequency but are separated in time. The spectrum that supports TDD operation can also be called TDD spectrum. For a carrier, since the TDD spectrum has only a continuous bandwidth for uplink and downlink transmissions, it is sometimes also called unpaired spectrum. Figure 2 is an example diagram of TDD. In Figure 3, "U" represents uplink transmission, "D" represents downlink transmission, and "f UL+DL ” indicates the frequencies used for uplink and downlink transmissions.

[0133] FDD supports uplink and downlink transmission using different frequencies. Depending on whether uplink and downlink transmission are performed simultaneously, it can be divided into full-duplex FDD and half-duplex FDD. The spectrum that supports FDD operation can also be called FDD spectrum. For a carrier, since the FDD spectrum has a pair of non-continuous bandwidths used for uplink and downlink transmission respectively, it is sometimes also called a paired spectrum. Figure 3 is an example diagram of full-duplex TDD, and Figure 4 is an example diagram of half-duplex TDD. Among them, "U" in Figures 3 and 4 represents uplink transmission, "D" represents downlink transmission, and "f UL " indicates the frequency used for uplink transmission, "f DL ” indicates the frequency used for downlink transmission.

[0134] The existing FDD spectrum has the following main problems: 1) The uplink bandwidth and downlink bandwidth in the FDD spectrum are fixedly and symmetrically allocated. However, at the current stage, the wide area network is dominated by downlink services, the uplink services are insufficient, and the uplink spectrum utilization is low, resulting in low overall spectrum efficiency and low downlink throughput; 2) In the existing FDD spectrum, uplink transmission and downlink transmission are at different frequencies, resulting in low reciprocity between the uplink channel and the downlink channel, and the acquisition of FDD system channel information becomes a shortcoming, which limits the improvement of spectrum efficiency. For the above reasons, FDD spectrum can have some new uses in the future evolution process, including downlink transmission in the uplink spectrum, or uplink transmission in the downlink spectrum. Figure 5 is an example diagram of the reconstruction scheme of FDD spectrum. It can be seen that the uplink spectrum can be used for downlink transmission. Figure 6 is another example diagram of the reconstruction scheme of FDD spectrum. It can be seen that the downlink spectrum can be used for uplink transmission, and the uplink spectrum can be used for downlink transmission. Among them, "U", "D", "f" in Figures 5 and 6 UL ”, “f DL The meaning of " is the same as that in Figure 3. This approach can, on the one hand, provide more resources for downlink transmission, and on the other hand, enhance the reciprocity of uplink and downlink channels and improve transmission performance.

[0135] 2. Bandwidth part (BWP)

[0136] To support devices with different bandwidth capabilities and to consider energy conservation, NR introduces the concept of BWP. A BWP is a continuous resource in the frequency domain, including uplink BWP and downlink BWP, which are used for uplink and downlink transmissions, respectively.

[0137] During the initial access phase, the network device configures the initial uplink BWP and the initial downlink BWP for the terminal device. After entering the radio resource control (RRC) connection state, the network device configures one or more exclusive uplink BWP and downlink BWP for the terminal device. The current NR protocol defines that uplink transmission is performed entirely within the uplink BWP, and downlink transmission is performed entirely within the downlink BWP. If the terminal device receives multiple BWP configurations, the terminal device can only work on one of the BWPs at the same time. This BWP is called an activated BWP. Since the terminal device transmits data based on BWP, the parameters of the terminal device's data transmission are mostly based on the BWP configuration, such as physical layer parameters, high-layer parameters, etc.

[0138] Existing protocols stipulate that BWPs can only be configured within the corresponding carrier bandwidth: uplink BWPs are configured within the uplink carrier bandwidth, and downlink BWPs are configured within the downlink carrier bandwidth. Therefore, for FDD systems, uplink BWPs can only be configured in the uplink spectrum, and downlink BWPs can only be configured in the downlink spectrum. Figure 7 illustrates the uplink and downlink BWP configurations for FDD frequencies. As can be seen, downlink BWP#0 and downlink BWP#X are configured in the downlink carrier, while uplink BWP#0 and uplink BWP#Y are configured in the uplink carrier.

[0139] For TDD systems, the protocol also stipulates that uplink and downlink BWPs must appear in pairs, and the center frequencies of a pair must coincide. However, there are no restrictions on bandwidth size. Figure 8 illustrates the uplink and downlink BWP configurations for TDD frequencies. As can be seen, uplink BWP#0 and downlink BWP#0 form a pair of BWPs, sharing the same center frequency. Uplink BWP#X and downlink BWP#X also form a pair of BWPs, sharing the same center frequency.

[0140] In order to support the new usage of FDD spectrum, that is, supporting uplink transmission in the downlink spectrum and / or supporting downlink transmission in the uplink spectrum, how the network equipment configures the BWP for uplink and downlink transmission for the terminal device remains to be solved.

[0141] In one possible implementation, both the FDD uplink and downlink carriers are treated as TDD carriers. This means that both downlink and uplink BWPs are configured for both the FDD uplink and downlink carriers, and their center frequencies are aligned. Figure 9 shows an example of configuring BWPs on an FDD spectrum. This example uses one downlink BWP and one uplink BWP configured for each carrier. Referring to Figure 9, uplink BWP#0 and downlink BWP#0 are configured for the downlink carrier, and their center frequencies are aligned. Uplink BWP#1 and downlink BWP#1 are configured for the uplink carrier, and their center frequencies are aligned.

[0142] However, the above usage may have the following problems:

[0143] Question 1: The current protocol stipulates that for a terminal device, only one BWP can be activated simultaneously in the same link direction. Therefore, the above BWP configuration method means that the terminal device can only use one BWP in the uplink carrier or downlink carrier for data transmission at a certain time. As a result, the terminal device can only use the resources of one carrier for transmission in the same link direction, and the maximum transmission rate of the terminal device is limited.

[0144] Question 2: The current protocol stipulates that when BWP is activated and switching occurs, there is a large switching delay. During the switching delay, the terminal device cannot perform any uplink or downlink data transmission. Specifically, the existing BWP switching delay values ​​are shown in Table 1.

[0145] Table 1

[0146] As can be seen, the existing BWP switching delay is at least one slot, or even longer. Combined with the BWP configuration method for FDD spectrum, if a terminal device's active BWP switches from one carrier to another, there will be significant latency and data interruption. This prevents the terminal device from quickly switching between the two carriers to achieve greater frequency diversity gain and rapid interference avoidance, and is also detrimental to rapid load balancing between the two carriers.

[0147] In order to solve the above problems, this application provides corresponding embodiments, which are described in detail below.

[0148] Figure 10 is a flow chart of a communication method provided in an embodiment of the present application. The method is executed by a network device or a module (such as a chip) of a network device, and a terminal device or a module (such as a chip) of a terminal device. The following description uses the network device and the terminal device as an example to illustrate the method.

[0149] The method comprises the following steps:

[0150] Step 1001: A network device sends first configuration information to a terminal device. Correspondingly, the terminal device receives the first configuration information.

[0151] The first configuration information is used to configure a first carrier and a second carrier for the terminal device. The first carrier and the second carrier have the same link direction, for example, both are uplink carriers or both are downlink carriers. The link direction here refers to the direction of data or signaling transmission, including the uplink direction and the downlink direction.

[0152] Exemplarily, the first carrier and the second carrier belong to the same cell.

[0153] In one implementation method, the first carrier is located in a first sub-frequency band of a first frequency band, the second carrier is located in a second sub-frequency band of the first frequency band, and the first sub-frequency band and the second sub-frequency band are discontinuous.

[0154] In another implementation method, the first carrier is located in the uplink frequency band of the first frequency band, and the second carrier is located in the downlink frequency band of the first frequency band, or the first carrier is located in the downlink frequency band of the first frequency band, and the second carrier is located in the uplink frequency band of the first frequency band. The uplink frequency band and the downlink frequency band are discontinuous.

[0155] In another implementation method, the first carrier is located in the uplink frequency band of the FDD frequency band, and the first carrier is located in the downlink frequency band of the FDD frequency band, or the first carrier is located in the downlink frequency band of the FDD frequency band, and the first carrier is located in the uplink frequency band of the FDD frequency band, wherein the uplink frequency band and the downlink frequency band are discontinuous.

[0156] Exemplarily, the first carrier and the second carrier are two frequency parts of the same carrier, or may be two independent carriers.

[0157] Exemplarily, the above-mentioned first configuration information can be carried in radio resource control (RRC) signaling, system information block (SIB), master information block (MIB), downlink control information (DCI) or medium access control control element (MAC CE).

[0158] Exemplarily, the first configuration information is used to configure the frequency starting position (such as relative position or absolute position) and bandwidth size of the first carrier, and to configure the frequency starting position (such as relative position or absolute position) and bandwidth size of the second carrier.

[0159] As an implementation method, if the first carrier and the second carrier have the same bandwidth, the first configuration information may include the frequency starting position of the first carrier, the frequency starting position of the second carrier, and the bandwidth, which applies to both the first and second carriers. This method only requires the first configuration information to carry one bandwidth size, not two, which can save signaling overhead.

[0160] As another implementation method, if the bandwidths of the first carrier and the second carrier are different, the first configuration information includes the frequency starting position and bandwidth of the first carrier, and the frequency starting position and bandwidth of the second carrier. This method configures the bandwidth of the first carrier and the bandwidth of the second carrier separately, allowing for flexible bandwidth configuration based on service requirements, increasing configuration flexibility.

[0161] In an embodiment of the present application, the subcarrier spacing (SCS) of the first carrier and the second carrier can be the same, thereby reducing the processing complexity of the network device and the terminal device. Alternatively, the subcarrier spacing of the first carrier and the second carrier can be different, thereby supporting different types of service requirements.

[0162] Step 1002: The network device sends second configuration information to the terminal device. Correspondingly, the terminal device receives the second configuration information.

[0163] The second configuration information is used to configure X BWPs for the terminal device, where X is an integer greater than 1, or X is a positive integer. Here, X refers to the maximum number of BWPs that the network device can use for the terminal device, that is, the terminal device can use one or more of the X BWPs for data or signaling transmission.

[0164] The network device may activate one BWP among the X BWPs, or simultaneously activate N BWPs among the X BWPs, where N is an integer greater than 1.

[0165] In one implementation method, the X BWPs have the same link direction as the two carriers.

[0166] In one implementation method, frequency resources of at least two BWPs among the X BWPs do not overlap with each other.

[0167] The order of step 1001 and step 1002 is not limited. Step 1001 can be performed first and then step 1002, or step 1002 can be performed first and then step 1001, or step 1001 and step 1002 can be performed simultaneously.

[0168] The above scheme configures X BWPs with the same link direction as the first carrier and the second carrier for the terminal device, where X is an integer greater than 1, and allows multiple BWPs to be activated at the same time, thereby improving the efficiency of frequency resource utilization, increasing the data transmission rate of the terminal device, and improving the uplink and downlink transmission performance of the terminal device.

[0169] Regarding the relationship between the X BWPs and the first carrier and the second carrier, and the configuration of the X BWPs, two different implementation methods are given below.

[0170] Implementation method one, X is an integer greater than 1, the X BWPs have the same link direction as the first carrier and the second carrier, and M of the X BWPs are located in the first carrier, and the other XM of the X BWPs are located in the second carrier, and one or N of the X BWPs are activated simultaneously, M is a positive integer, XM is a positive integer, and N is an integer greater than 1.

[0171] Based on the first implementation method, the network device configures X BWPs for the terminal device, where X is greater than or equal to 2, and a portion of the X BWPs is located in the first carrier and another portion is located in the second carrier. One or more of the X BWPs can be activated simultaneously.

[0172] If the link direction of the first carrier and the second carrier is uplink, the link direction of the X BWPs is also uplink; if the link direction of the first carrier and the second carrier is downlink, the link direction of the X BWPs is also downlink.

[0173] Figure 11 is an example diagram of BWP configuration provided by an embodiment of the present application. In this example, the network device configures five BWPs for the terminal device, of which BWP#1, BWP#2, and BWP#3 are located on the first carrier, and BWP#4 and BWP#5 are located on the second carrier.

[0174] Exemplarily, if N BWPs out of the X BWPs are activated simultaneously, where N is an integer greater than 1, the activated N BWPs may all be located on the first carrier, for example, the N carriers include BWP#1 and BWP#2 in FIG11 ; or the N BWPs may all be located on the second carrier, for example, the N carriers include BWP#4 and BWP#5 in FIG11 ; or a portion of the N BWPs may be located on the first carrier, and another portion of the carriers may be located on the second carrier, for example, the N carriers include BWP#2, BWP#3, and BWP#4 in FIG11 .

[0175] For the BWP of the first implementation method, two methods for identifying the BWP are introduced below, refer to the following BWP identification method 1 and BWP identification method 2 respectively.

[0176] BWP identification method 1: The identifier of each BWP in the above-mentioned X BWPs includes two parts, namely a first part and a second part. The first part and the second part jointly uniquely indicate a BWP, and the first part of the identifiers of the X BWPs is the same, and the second parts of the identifiers of the X BWPs are different from each other.

[0177] Based on the BWP identification method, the identifiers of the configured X BWPs all include a first part and a second part, and the first part of the identifiers of the X BWPs are the same, so that the association between the X BWPs can be achieved. In this way, there is no need to associate the X BWPs through additional signaling, thereby reducing signaling overhead.

[0178] The first part of the BWP identifier may also be referred to as the parent identifier of the X BWPs, and the second part of the BWP identifier may also be referred to as the child identifier of the X BWPs.

[0179] Exemplarily, the network device may activate one or N BWPs among the X BWPs by using RRC signaling, MAC CE, DCI or other signaling or predefined rules, where N is an integer greater than 1.

[0180] As an example, three different activation methods are introduced below, namely activation method a, activation method b, and activation method c.

[0181] Activation method a, the network device sends a DCI to the terminal device, the DCI is used to activate 1 or N BWPs, the DCI includes a BWP indication field, the BWP indication field includes a first field and a second field, the first field is used to indicate the first part of the identifier of X BWPs, and the second field is used to indicate the second part of the identifier of 1 or N BWPs.

[0182] This solution activates 1 or N BWPs through DCI, which can realize dynamic activation of BWPs and increase the flexibility of the solution.

[0183] The BWP indication field may reuse the BWP indication field specified in the existing protocol.

[0184] Exemplarily, the first field of the BWP indication field includes A bits, which are used to indicate the common first part of the X BWPs, and the second field of the BWP indication field includes B bits, which are used to indicate the second part of the identifier of 1 or N BWPs. For example, if it is indicated that three BWPs are activated simultaneously, the first A bits of the BWP indication field indicate the common first part of the identifiers of the three BWPs, and the last B bits of the BWP indication field indicate the second part of each of the identifiers of the three BWPs.

[0185] Two different implementation methods for the second field of the BWP indication field to indicate the second part of the identifier of one or N BWPs are introduced below.

[0186] Method 1): The second field includes X bits (i.e., B = X), each of which corresponds to one of the X BWPs. One or N of the X bits takes a first value, indicating that the corresponding BWP is activated, and the remaining X-1 or XN bits of the X bits take a second value, indicating that the corresponding BWP is not activated. This can also be understood as each of the X bits being used to indicate the second part of the identifier of the BWP to be activated.

[0187] This solution activates the BWP by associating X bits with X BWPs, which can use fewer bits to indicate the activated BWP and reduce signaling overhead.

[0188] For example, if X equals 5 and the five configured BWPs are BWP#1, BWP#2, BWP#3, BWP#4, and BWP#5, the second field consists of five bits, each of which has a value of 0 or 1. For example, a value of 0 indicates that the corresponding BWP is inactive, while a value of 1 indicates that the corresponding BWP is active. If the five bits correspond, from high to low, to BWP#1, BWP#2, BWP#3, BWP#4, and BWP#5, and BWP#1 and BWP#2 need to be activated, the value of the five bits is 11000.

[0189] The X bits as a whole may also be referred to as a bitmap.

[0190] Mode 2): The second field includes the second part of the identifier of the one or N BWPs that need to be activated. That is, the second part of the identifier of the BWP that needs to be activated is explicitly included in the second field.

[0191] Exemplarily, if the maximum number of BWPs allowed to be activated is C, where C is less than or equal to X, and C is greater than or equal to the aforementioned N, and the second part of the identifier of each BWP occupies D bits, then the second field may include C*D bits, and each D bits may be used to indicate the second part of the identifier of the BWP that needs to be activated.

[0192] For example, X=10, C=8, the second part of the identifier of each BWP occupies 3 bits, then the second domain occupies 8*3=24 bits. If the number of BWPs that currently need to be activated is 5, then 5*3=15 bits in the second domain are used to represent the second part of the identifier of the 5 BWPs that need to be activated, and the other 9 bits can be set to a preset value, indicating that the second part of the identifier is not used to represent any BWP.

[0193] Activation method b: The network device sends a DCI to the terminal device, where the DCI is used to activate 1 or N BWPs. The DCI includes a first BWP indication field and a second BWP indication field. The first BWP indication field is used to indicate the first part of the identifier of X BWPs, and the second BWP indication field is used for the second part of the identifier of 1 or N BWPs.

[0194] The first BWP indication field may reuse the BWP indication field specified in the existing protocol, and the second BWP indication field may be a newly added BWP indication field.

[0195] For example, if three BWPs are activated simultaneously, the first BWP indication field indicates the common first part of the identifiers of the three BWPs, and the second BWP indication field indicates the respective second parts of the identifiers of the three BWPs.

[0196] Two different implementation methods for the second BWP indication field to indicate the second part of the identifier of 1 or N BWPs are described below.

[0197] In method 1), the second BWP indication field includes X bits, each of which corresponds one-to-one to each of the X BWPs. One or N of the X bits takes a first value, which indicates activation of the corresponding BWP. The remaining X-1 or XN bits of the X bits take a second value, which indicates deactivation of the corresponding BWP. This can also be understood as each of the X bits being used to indicate the second portion of the identifier of the BWP to be activated.

[0198] For example, if X equals 5 and the five configured BWPs are BWP#1, BWP#2, BWP#3, BWP#4, and BWP#5, the second field consists of five bits, each of which has a value of 0 or 1. For example, a value of 0 indicates that the corresponding BWP is inactive, while a value of 1 indicates that the corresponding BWP is active. If the five bits correspond, from high to low, to BWP#1, BWP#2, BWP#3, BWP#4, and BWP#5, and BWP#1 and BWP#2 need to be activated, the value of the five bits is 11000.

[0199] The X bits as a whole may also be referred to as a bitmap.

[0200] Mode 2): The second BWP indication field includes the second part of the identifier of the one or N BWPs that need to be activated. That is, the second part of the identifier of the BWP that needs to be activated is explicitly included in the second BWP indication field.

[0201] Exemplarily, if the maximum number of BWPs allowed to be activated is C, where C is less than or equal to X, and C is greater than or equal to the aforementioned N, and the second part of the identifier of each BWP occupies D bits, then the second BWP indication field may include C*D bits, and each D bits may be used to indicate the second part of the identifier of the BWP that needs to be activated.

[0202] For example, X=10, C=8, the second part of the identifier of each BWP occupies 3 bits, then the second BWP indication field occupies 8*3=24 bits. If the number of BWPs that currently need to be activated is 5, then 5*3=15 bits in the second BWP indication field are used to represent the second part of the identifier of the 5 BWPs that need to be activated, and the other 9 bits can be set to a preset value, indicating that the second part of the identifier is not used to represent any BWP.

[0203] Activation mode c, the network device sends a first signaling and DCI to the terminal device, where the first signaling indicates the first part of the identifier of 1 or N BWPs among X BPWs, and the DCI is used to indicate the second part of the identifier of the 1 or N BWPs. The first signaling is RRC signaling, SIB, MIB or MAC CE.

[0204] That is, this method indicates the common first part of the identifiers of the activated 1 or N BWPs through the first signaling, and indicates the respective second parts of the identifiers of the activated 1 or N BWPs through the DCI.

[0205] As an implementation method, the BWP indication field in the DCI may be used to indicate the second part of each identifier of the activated 1 or N BWPs. The BWP indication field may be a reused BWP indication field in an existing protocol or a newly added BWP indication field.

[0206] BWP identification method 2: Each of the X BWPs has a unique identification. That is, each BWP has an identification, and the identifications of different BWPs are different.

[0207] For example, the network device may send a DCI to the terminal device, where the DCI is used to activate one or N BWPs among the X BWPs. Three different implementation methods are described below, namely activation method 1, activation method 2, and activation method 3.

[0208] Activation mode 1: the DCI includes 1 or N BWP indication fields, and each BWP indication field indicates an identifier of a BWP.

[0209] For example, if the maximum number of BWPs allowed to be activated is C, where C is less than or equal to X, and C is greater than or equal to the aforementioned N, then the DCI may include C BWP indication fields. For example, if one BWP currently needs to be activated, the corresponding BWP indication field in the DCI may indicate the identity of the activated BWP, and the other C-1 BWP indication fields are not used to indicate the identity of any BWP. For another example, if three BWPs currently need to be activated, the corresponding three BWP indication fields in the DCI may indicate the identities of the three activated BWPs, respectively. Each of the three BWP indication fields is used to indicate the identity of one activated BWP, and the other C-3 BWP indication fields are not used to indicate the identity of any BWP.

[0210] Activation mode 2, the DCI includes a BWP indication field, the BWP indication field includes X bits, the X bits correspond one-to-one to X BWPs, N bits of the X bits take a first value, the first value is used to indicate that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value is used to indicate that the corresponding BWP is not activated.

[0211] For example, if X equals 5 and the five configured BWPs are BWP#1, BWP#2, BWP#3, BWP#4, and BWP#5, the BWP indication field consists of five bits, each of which takes a value of 0 or 1. For example, a value of 0 indicates that the corresponding BWP is inactive, while a value of 1 indicates that the corresponding BWP is active. If the five bits correspond, from high to low, to BWP#1, BWP#2, BWP#3, BWP#4, and BWP#5, and BWP#1 and BWP#2 need to be activated, the value of the five bits is 11000.

[0212] The X bits as a whole may also be referred to as a bitmap.

[0213] The BWP indication field may be a reused BWP indication field in an existing protocol.

[0214] Activation mode 3: The DCI includes a BWP indication field, which includes the identifiers of one or N BWPs that need to be activated. That is, the BWP indication field explicitly includes the identifiers of the BWPs that need to be activated.

[0215] Exemplarily, if the maximum number of BWPs allowed to be activated is C, where C is less than or equal to X, and C is greater than or equal to the aforementioned N, and the identifier of each BWP occupies D bits, then the BWP indication field may include C*D bits, and each D bits may be used to indicate the identifier of 1 BWP that needs to be activated.

[0216] For example, X=10, C=8, the identifier of each BWP occupies 3 bits, then the BWP indication field occupies 8*3=24 bits. If the number of BWPs that currently need to be activated is 5, then 5*3=15 bits in the BWP indication field are used to indicate the identifiers of the 5 BWPs that need to be activated, and the other 9 bits can be set to preset values, indicating that they are not used to indicate the identifier of any BWP.

[0217] The above introduces two different identification methods of BWP, and provides a variety of different specific implementation methods for each identification method.

[0218] As an implementation method, the X BWPs in the above implementation method 1 may further satisfy the following feature 1 and / or feature 2.

[0219] Feature 1: Some or all of the following parameters of the X BWPs are identical: BWP frequency resource parameters, channel parameters, or signal parameters. This means that the X BWPs can share parameters, or it can be understood that the parameters configured for the X BWPs are partially or completely identical.

[0220] Exemplarily, the channels here may include one or more of the following: PDSCH, PDCCH, PUSCH, PRACH or PUCCH.

[0221] Exemplarily, the signal here may include one or more of the following: DMRS of PDSCH, DMRS of PDCCH, DMRS of PUSCH, DMRS of PUCCH, PTRS of PDSCH, PTRS of PUSCH, CSI-RS, TRS, SRS or SSB.

[0222] Since the parameters configured for the X BWPs are partially or completely the same, the following benefits are achieved: first, signaling overhead can be reduced when configuring parameters; second, the memory specifications and implementation complexity of the terminal device can be reduced; third, when the X BWPs switch between each other, the switching delay can be reduced due to the presence of common parameters.

[0223] Feature 2: The switching delay between the X BWPs is less than a first threshold.

[0224] Referring to Table 1 above, when μ is 0, the subcarrier spacing is 15 kHz, and the first threshold is equal to the duration of 1 time slot (for type 1) or the duration of 3 time slots (for type 2). When μ is 1, the subcarrier spacing is 30 kHz, and the first threshold is equal to the duration of 2 time slots (for type 1) or the duration of 5 time slots (for type 2). When μ is 2, the subcarrier spacing is 60 kHz, and the first threshold is equal to the duration of 3 time slots (for type 1) or the duration of 9 time slots (for type 2). When μ is 3, the subcarrier spacing is 120 kHz, and the first threshold is equal to the duration of 6 time slots (for type 1) or the duration of 18 time slots (for type 2).

[0225] Therefore, in the embodiment of the present application, when X BWPs meet feature 2, when the X BWPs switch to each other, the switching delay will be shorter than the switching delay between BWPs in the existing protocol, that is, the switching delay can be reduced.

[0226] In order to satisfy the above-mentioned feature 2, a possible implementation method is: enhancing the capability of the terminal device so that the terminal device can reduce the switching delay between BWPs.

[0227] When the X BWPs configured for a terminal device meet the aforementioned characteristics 1 and / or 2, the switching delay between the X BWPs can be reduced. For example, the reduced switching delay can be symbol-level, such as 1 or 2 symbols, or even reduced to zero. In contrast, the BWP switching delay in existing protocols shown in Table 1 is slot-level.

[0228] In combination with the two aforementioned BWP identification methods, for the aforementioned BWP identification method 1, that is, the identification of each BWP includes a first part and a second part, if two BWPs contain the same first part, then the switching delay between the two BWPs can be reduced according to the aforementioned delay reduction method; if the two BWPs contain different first parts, then the maximum value of the switching delay between the two BWPs can be defined according to the existing protocol shown in Table 1. For example, the network device configures BWP#1 to BWP#10 for the terminal device in the manner of the embodiment of FIG10 , where the link direction of the 10 BWPs is the uplink direction, and the BWP#1 to BWP#10 constitute a group of BWPs, and the identifiers of BWP#1 to BWP#10 include the same first part and different second parts; and the network device configures BWP#11 to BWP#20 for the terminal device in the manner of the embodiment of FIG10 , where the link direction of the 10 BWPs can be all uplink or all downlink, and the BWP#11 to BWP#20 constitute a group of BWPs, and the identifiers of BWP#11 to BWP#20 include the same first part and different second parts. The first part of the identifiers of BWP#1 to BWP#10 is different from the first part of the identifiers of BWP#11 to BWP#20. The handover delay between any two BWPs from BWP#1 to BWP#10 can be reduced using the aforementioned delay reduction method. The handover delay between any two BWPs from BWP#11 to BWP#20 can also be reduced using the aforementioned delay reduction method. However, if any BWP from BWP#1 to BWP#10 is switched to any BWP from BWP#11 to BWP#20, or if any BWP from BWP#11 to BWP#20 is switched to any BWP from BWP#1 to BWP#10, the maximum handover delay for the BWP can be defined according to the existing protocol shown in Table 1. In other words, the handover delay between different BWPs within the same BWP group must be lower than the handover delay between different BWPs in different BWP groups.

[0229] For the aforementioned BWP identification method 2, that is, the identifier of each BWP is a unique identifier, the network device can associate multiple BWPs configured for the terminal device through signaling, wherein the switching delay between the associated multiple BWPs can be reduced according to the aforementioned delay reduction method. For example, the network device configures BWP#1 to BWP#10 for the terminal device in the manner of the embodiment of Figure 10 above, the link direction of the 10 BWPs is the uplink direction, the BWP#1 to BWP#10 constitute a group of BWPs, and the identifiers of BWP#1 to BWP#10 are different from each other; and BWP#11 to BWP#20 are configured for the terminal device in the manner of the embodiment of Figure 10 above, the link direction of the 10 BWPs can be all uplink directions or all downlink directions, the BWP#11 to BWP#20 constitute a group of BWPs, the identifiers of BWP#11 to BWP#20 are different from each other, and the identifier of any BWP in BWP#1 to BWP#10 is different from the identifier of any BWP in BWP#11 to BWP#20. If a network device indicates to a terminal device that BWP#1 to BWP#10 are associated with each other, and that BWP#11 to BWP#20 are associated with each other, the switching delay between any two BWPs in BWP#1 to BWP#10 can be reduced according to the aforementioned delay reduction method. The switching delay between any two BWPs in BWP#11 to BWP#20 can also be reduced according to the aforementioned delay reduction method. However, if any BWP in BWP#1 to BWP#10 switches to any BWP in BWP#11 to BWP#20, or if any BWP in BWP#11 to BWP#20 switches to any BWP in BWP#1 to BWP#10, the maximum switching delay of the BWPs can be defined according to the existing protocol shown in Table 1. In other words, the switching delay between different BWPs in the same BWP group must be lower than the switching delay between different BWPs in different BWP groups.

[0230] Implementation method two. In another embodiment, the relationship between X BWPs and the first carrier and the second carrier satisfies: X is a positive integer, the link directions of the X BWPs and the first carrier and the second carrier are the same, and the X BWPs include the first BWP, the frequency resources of the first BWP are continuous, and the frequency resources of the first BWP overlap with both the first carrier and the second carrier, and one or N BWPs of the X BWPs are activated at the same time, where N is an integer greater than 1.

[0231] Based on this second implementation method, the network device configures X BWPs for the terminal device, where X is greater than or equal to 1. One or more of the X BWPs can be activated simultaneously. The X BWPs include at least a first BWP, which can span frequency resources of the first carrier and the second carrier. That is, the frequency resources of the first BWP overlap with the frequency resources of both the first carrier and the second carrier.

[0232] The main difference between this implementation method 2 and the aforementioned implementation method 1 is that the BWP configured in this implementation method 2 may span the first and second carriers, meaning that a BWP overlaps both carriers simultaneously. In contrast, the BWP configured in the aforementioned implementation method 1 is within the first or second carrier and therefore does not overlap with both carriers simultaneously. This implementation method 2 places fewer restrictions on BWP configuration, increasing BWP configuration flexibility.

[0233] If X is an integer greater than 1, any BWP in the X BWPs, except the first BWP, can be similar to the first BWP, spanning the first and second carriers, or can be located within the first or second carrier. In other words, this method requires that at least one BWP (such as the first BWP) span the first and second carriers, while the configuration of other BWPs is not restricted and can be within the first or second carrier, or span both the first and second carriers.

[0234] If the link direction of the first carrier and the second carrier is uplink, the link direction of the X BWPs is also uplink; if the link direction of the first carrier and the second carrier is downlink, the link direction of the X BWPs is also downlink.

[0235] Figure 12 is an example diagram of a BWP configuration provided by an embodiment of the present application. In this example, the network device configures three BWPs for the terminal device, where BWP#1 is located on the first carrier, BWP#3 is located on the second carrier, and the frequency resources of BWP#2 overlap with the frequency resources of both the first and second carriers.

[0236] For the above-mentioned first BWP (for example, BWP#2 in Figure 12), only the valid resources within the first BWP can be used for data transmission. The valid resources within the first BWP refer to the overlapping part of the frequency resources of the first BWP and the frequency resources of the first carrier and / or the second carrier. The valid resources within the first BWP include the first valid resources located on the first carrier and / or the second valid resources located on the second carrier.

[0237] Based on the second implementation method, in one implementation method, the second configuration information includes RB start and L RB Among them, RB startIndicates the intra-carrier offset of the first BWP, that is, the offset of the frequency domain starting position of the first BWP compared to the frequency domain starting position of the reference carrier (or associated carrier), where the reference carrier is the first carrier or the second carrier. RB Indicates the bandwidth size of the first BWP, for example, the number of PRBs occupied by the first BWP. This solution explicitly carries the carrier offset of the first BWP and the bandwidth size of the first BWP in the second configuration information, which can improve the accuracy of the configuration.

[0238] Figure 13 is an example of the first BWP. Indicates the frequency domain starting position of the first BWP, with O carrier represents the frequency domain starting position of the reference carrier of the first BWP, then Among them, O carrier The network device may configure the reference carrier through signaling. In the example of FIG13 , the reference carrier of the first BWP is the first carrier.

[0239] As an implementation method, the reference carrier of the first BWP can be set by default to the carrier with the lower frequency position between the first carrier and the second carrier through protocol definition or pre-configuration, that is, the frequency domain starting position of the first BWP is located within the carrier with the lower frequency position between the first carrier and the second carrier.

[0240] As another implementation method, the second configuration information of the above step 1002 includes indication information, which is used to indicate the carrier where the frequency domain starting position of the first BWP is located, that is, the second configuration information explicitly indicates that the reference carrier of the first BWP is the first carrier or the second carrier.

[0241] The following describes how the network device configures the first BWP carrier offset (ie RB start ) and the bandwidth size of the first BWP (ie L RB ) in two different ways.

[0242] Configuration method 1: the second configuration information in step 1002 includes the intra-carrier offset of the first BWP and the bandwidth size of the first BWP.

[0243] Based on the first configuration method, the second configuration information explicitly carries the intra-carrier offset of the first BWP and the bandwidth size of the first BWP.

[0244] Configuration method 2, the second configuration information of the above step 1002 includes a resource indicator value (RIV) and a first parameter value, the RIV and the first parameter are used to determine the intra-carrier offset of the first BWP and the bandwidth size of the first BWP, and the first parameter is not less than the size of the frequency resource range occupied by the first carrier and the second carrier.

[0245] In this solution, since the RIV and the first parameter occupy fewer bits, signaling overhead can be reduced.

[0246] Figure 14 is an example of a first BWP. The size of the frequency resource range occupied by the first carrier and the second carrier refers to the continuous frequency domain resources between the frequency domain start position of the first carrier and the frequency domain end position of the second carrier, or refers to the continuous frequency domain resources between the frequency domain start position of the second carrier and the frequency domain end position of the first carrier.

[0247] Based on the second configuration method, the carrier offset of the first BWP and the bandwidth size of the first BWP are not explicitly carried in the second configuration information, but the RIV and the first parameter are carried. Then, the terminal device can derive the carrier offset of the first BWP and the bandwidth size of the first BWP based on the RIV and the first parameter.

[0248] For example, RB start , L RB 、The first parameter (with The following relationship is satisfied between (represented by) and RIV:

[0249] if but

[0250] if but

[0251] in, and An integer greater than 275. In principle, the value of shall not be less than the size of the frequency resource range occupied by the first carrier and the second carrier.

[0252] Two different implementations of physical resource block (PRB) indexing of valid resources within the first BWP are introduced below, which are respectively the following method A and method B. The first BWP includes one or more PRBs.

[0253] Method A: PRBs in the first BWP are numbered consecutively.

[0254] All PRBs in the first BWP are PRB numbered in order from low to high. For example, the first BWP includes p+1 PRBs, and the indexes of the PRBs in the first BWP are from 0 to p.

[0255] The indexes of the PRBs included in the first valid resource are continuous, and the indexes of the PRBs included in the second valid resource are continuous, but the indexes of the PRBs in the first valid resource and the indexes of the PRBs in the second valid resource are not continuous.

[0256] Figure 15 shows an example of the first BWP. The PRBs within the first BWP are indexed from 0 to p, the first valid resource is indexed from 0 to m, and the second valid resource is indexed from m+k to p. It can be seen that the index of the first PRB of the second valid resource (i.e., m+k) is discontinuous with the index of the last PRB of the first valid resource (i.e., m). There are k-1 PRBs within the first BWP that do not overlap with the frequency resources of the first carrier and do not overlap with the frequency resources of the second carrier.

[0257] Method B: PRBs are numbered consecutively within the valid resources of the first BWP.

[0258] The indexes of the PRBs included in the first effective resource are continuous, the indexes of the PRBs included in the second effective resource are continuous, and the indexes of the PRBs in the first effective resource and the indexes of the PRBs in the second effective resource are also continuous.

[0259] Figure 16 shows an example of a first valid resource and a second valid resource. The first valid resource is indexed from 0 to m, and the second valid resource is indexed from m+1 to q. It can be seen that the index of the first PRB of the second valid resource (i.e., m+1) is consecutive to the index of the last PRB of the first valid resource (i.e., m).

[0260] For the second implementation method, in one implementation method, the size of the resource block group (RBG) is determined according to the number of PRBs contained in the valid resources within the first BWP, rather than according to the number of RPBs contained in the first BWP, that is, the number of RPBs occupied by invalid resources needs to be excluded. The invalid resources here refer to the frequency domain resources of the first BWP that neither overlap with the frequency domain resources of the first carrier nor with the frequency domain resources of the second carrier. Among them, the size of the RBG refers to the number of PRBs contained in the RBG. Accordingly, the number of bits contained in the frequency domain resource allocation (FDRA) indication field in the DCI is determined based on the number of PRBs contained in the valid resources of the first BWP and the size of the RBG.

[0261] Regarding the second implementation method, in one implementation method, a first precoding codebook is used for PDSCH transmission or PUSCH transmission within a first valid resource, and a second precoding codebook is used within a second valid resource. The first precoding codebook and the second precoding codebook may be the same or different, and this application does not limit this.

[0262] Regarding the second implementation method, in one implementation method, a first resource is used within a first effective resource to perform downlink measurement and / or a second resource is used to perform measurement reporting, and a third resource is used within a second effective resource to perform downlink measurement and / or a fourth resource is used to perform measurement reporting. The first resource is different from the third resource, and the second resource and the fourth resource may be the same or different. That is, downlink measurement and reporting are performed independently within different effective resources of the first BWP. The downlink measurements here include, for example, channel state information (CSI) measurements, downlink path loss measurements, and the like. This solution performs downlink measurement and reporting independently within different effective resources, which can increase the flexibility and accuracy of measurement and reporting.

[0263] For the second implementation method, in one implementation method, the fifth resource is used within the first effective resource for uplink measurement, and the sixth resource is used within the second effective resource for uplink measurement. The fifth resource is different from the sixth resource. That is, uplink measurement is performed independently in different effective resources of the first BWP. For example, when a PUSCH transmission spans the first effective resource and the second effective resource, the first effective resource and the second effective resource can maintain the same number of transmission layers, but different antenna ports and precoding codebooks. This solution performs uplink measurement independently in different effective resources, which can increase the flexibility and accuracy of the measurement.

[0264] For the above-mentioned implementation method 2, the first BWP is taken as an example to introduce the relevant implementation method of the first BWP. For other BWPs, if the frequency domain resources of the BWP overlap with the frequency domain resources of the first carrier and the second carrier, the implementation method of the BWP can refer to the implementation method of the first BWP and will not be repeated.

[0265] As an implementation method, the BWP identification method, BWP activation method, and method for reducing the switching delay between multiple BWPs in the above-mentioned implementation method 2 can all refer to the BWP identification method, BWP activation method, and method for reducing the switching delay between multiple BWPs in the above-mentioned implementation method 1, or be implemented in other ways, and this application is not limited to this.

[0266] It is understood that in order to implement the functions in the above embodiments, the terminal device or network device includes hardware structures and / or software modules corresponding to the execution of each function. It should be readily apparent to those skilled in the art that, in combination with the units and method steps of each example described in the embodiments disclosed in this application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in hardware or in a manner driven by computer software depends on the specific application scenario and design constraints of the technical solution.

[0267] Figures 17 and 18 are schematic diagrams of the structures of possible communication devices provided in embodiments of the present application. These communication devices can be used to implement the functions of the terminal device or network device in the above method embodiments, thereby also achieving the beneficial effects of the above method embodiments. In the embodiments of the present application, the communication device can be a terminal device or a network device, or a module (such as a chip) applied to the terminal device or the network device.

[0268] The communication device 1700 shown in Figure 17 includes a processing unit 1710 and a transceiver unit 1720. The communication device 1700 is used to implement the functions of the terminal device or network device in the above method embodiment.

[0269] When the communication device 1700 is used to implement the function of the network device in the above method embodiment, the processing unit 1710 is used to control the transceiver unit 1720 to send first configuration information to the terminal device, where the first configuration information is used to configure a first carrier and a second carrier for the terminal device; and send second configuration information to the terminal device, where the second configuration information is used to configure X BWPs for the terminal device, where X is an integer greater than 1; wherein the first carrier, the second carrier, and the X BWPs have the same link direction, the first carrier is located in a first sub-band of a first frequency band, the second carrier is located in a second sub-band of the first frequency band, and the first sub-band is discontinuous with the second sub-band; M of the X BWPs are located in the first carrier, and the other XM of the X BWPs are located in the second carrier; and N of the X BWPs are activated simultaneously, where M is a positive integer, XM is a positive integer, and N is an integer greater than 1.

[0270] In a possible implementation method, some of the N BWPs are located in the first carrier, and another part is located in the second carrier.

[0271] In a possible implementation method, the identifier of each of the X BWPs includes a first part and a second part, the first parts of the identifiers of the X BWPs are the same, and the second parts of the identifiers of the X BWPs are different from each other.

[0272] In a possible implementation method, the processing unit 1710 is further configured to control the transceiver unit 1720 to send DCI to the terminal device, where the DCI is used to activate the N BWPs.

[0273] In a possible implementation method, the BWP indication field of the DCI includes a first field and a second field, the first field is used to indicate a first part of the identifiers of the N BWPs, and the second field is used to indicate a second part of the identifiers of the N BWPs.

[0274] In one possible implementation method, the second field includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

[0275] In a possible implementation method, the second field includes the second part of the identifiers of the N BWPs.

[0276] In a possible implementation method, the DCI includes a first BWP indication field and a second BWP indication field, the first BWP indication field is used to indicate a first part of the identifiers of the N BWPs, and the second BWP indication field is used to indicate a second part of the identifiers of the N BWPs.

[0277] In one possible implementation method, the second BWP indication field includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, and the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

[0278] In a possible implementation method, the second BWP indication field includes the second part of the identifiers of the N BWPs.

[0279] In one possible implementation method, the processing unit 1710 is further used to control the transceiver unit 1720 to send a first signaling and a DCI to the terminal device, where the first signaling is used to indicate the first part of the identifier of the N BWPs in the X BPWs, and the DCI is used to indicate the second part of the identifier of the N BWPs, and the first signaling is RRC signaling, SIB, MIB or MAC CE.

[0280] In a possible implementation method, each of the X BWPs has a unique identifier.

[0281] In a possible implementation method, the processing unit 1710 is further configured to control the transceiver unit 1720 to send DCI to the terminal device, where the DCI is used to activate the N BWPs.

[0282] In a possible implementation method, the DCI includes N BWP indication fields, and each of the N BWP indication fields is used to indicate an identifier of a BWP among the N BWPs.

[0283] In one possible implementation method, the DCI includes a BWP indication field, the BWP indication field includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

[0284] In a possible implementation method, the DCI includes a BWP indication field, and the BWP indication field includes identifiers of the N BWPs.

[0285] In a possible implementation method, some or all of the following parameters of the X BWPs are the same: BWP frequency resource parameters, channel parameters, or signal parameters.

[0286] In one possible implementation method, the channel includes one or more of the following: PDSCH, PDCCH, PUSCH, PRACH or PUCCH; the signal includes one or more of the following: DMRS of PDSCH, DMRS of PDCCH, DMRS of PUSCH, DMRS of PUCCH, PTRS of PDSCH, PTRS of PUSCH, CSI-RS, TRS, SRS or SSB.

[0287] In one possible implementation method, the switching delay between the X BWPs is less than a first threshold; wherein, when the subcarrier spacing is 15 kHz, the first threshold is equal to the length of 1 time slot or the length of 3 time slots; when the subcarrier spacing is 30 kHz, the first threshold is equal to the length of 2 time slots or the length of 5 time slots; when the subcarrier spacing is 60 kHz, the first threshold is equal to the length of 3 time slots or the length of 9 time slots; when the subcarrier spacing is 120 kHz, the first threshold is equal to the length of 6 time slots or the length of 18 time slots.

[0288] When the communication device 1700 is used to implement the functions of the terminal device in the above method embodiment, the processing unit 1710 is used to control the transceiver unit 1720 to receive first configuration information from a network device, where the first configuration information is used to configure a first carrier and a second carrier for the terminal device; and receive second configuration information from the network device, where the second configuration information is used to configure X BWPs for the terminal device, where X is an integer greater than 1; wherein the first carrier, the second carrier, and the X BWPs have the same link direction, the first carrier is located in a first sub-band of a first frequency band, the second carrier is located in a second sub-band of the first frequency band, and the first sub-band is discontinuous with the second sub-band; M of the X BWPs are located in the first carrier, and the other XM of the X BWPs are located in the second carrier; and N of the X BWPs are activated simultaneously, where M is a positive integer, XM is a positive integer, and N is an integer greater than 1.

[0289] In a possible implementation method, some of the N BWPs are located in the first carrier, and another part is located in the second carrier.

[0290] In a possible implementation method, the identifier of each of the X BWPs includes a first part and a second part, the first parts of the identifiers of the X BWPs are the same, and the second parts of the identifiers of the X BWPs are different from each other.

[0291] In a possible implementation method, the processing unit 1710 is further configured to control the transceiver unit 1720 to receive DCI from the network device, where the DCI is used to activate the N BWPs.

[0292] In a possible implementation method, the BWP indication field of the DCI includes a first field and a second field, the first field is used to indicate a first part of the identifiers of the N BWPs, and the second field is used to indicate a second part of the identifiers of the N BWPs.

[0293] In one possible implementation method, the second field includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

[0294] In a possible implementation method, the second field includes the second part of the identifiers of the N BWPs.

[0295] In a possible implementation method, the DCI includes a first BWP indication field and a second BWP indication field, the first BWP indication field is used to indicate a first part of the identifiers of the N BWPs, and the second BWP indication field is used to indicate a second part of the identifiers of the N BWPs.

[0296] In one possible implementation method, the second BWP indication field includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, and the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

[0297] In a possible implementation method, the second BWP indication field includes the second part of the identifiers of the N BWPs.

[0298] In one possible implementation method, the processing unit 1710 is further used to control the transceiver unit 1720 to receive first signaling and DCI from the network device, where the first signaling is used to indicate the first part of the identifier of the N BWPs in the X BPWs, and the DCI is used to indicate the second part of the identifier of the N BWPs, and the first signaling is RRC signaling, SIB, MIB or MAC CE.

[0299] In a possible implementation method, each of the X BWPs has a unique identifier.

[0300] In a possible implementation method, the processing unit 1710 is further configured to control the transceiver unit 1720 to receive DCI from the network device, where the DCI is used to activate the N BWPs.

[0301] In a possible implementation method, the DCI includes N BWP indication fields, and each of the N BWP indication fields is used to indicate an identifier of a BWP among the N BWPs.

[0302] In one possible implementation method, the DCI includes a BWP indication field, the BWP indication field includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

[0303] In a possible implementation method, the DCI includes a BWP indication field, and the BWP indication field includes identifiers of the N BWPs.

[0304] In a possible implementation method, some or all of the following parameters of the X BWPs are the same: BWP frequency resource parameters, channel parameters, or signal parameters.

[0305] In one possible implementation method, the channel includes one or more of the following: PDSCH, PDCCH, PUSCH, PRACH or PUCCH; the signal includes one or more of the following: DMRS of PDSCH, DMRS of PDCCH, DMRS of PUSCH, DMRS of PUCCH, PTRS of PDSCH, PTRS of PUSCH, CSI-RS, TRS, SRS or SSB.

[0306] In one possible implementation method, the switching delay between the X BWPs is less than a first threshold; wherein, when the subcarrier spacing is 15 kHz, the first threshold is equal to the length of 1 time slot or the length of 3 time slots; when the subcarrier spacing is 30 kHz, the first threshold is equal to the length of 2 time slots or the length of 5 time slots; when the subcarrier spacing is 60 kHz, the first threshold is equal to the length of 3 time slots or the length of 9 time slots; when the subcarrier spacing is 120 kHz, the first threshold is equal to the length of 6 time slots or the length of 18 time slots.

[0307] When the communication device 1700 is used to implement the function of the network device in the above method embodiment, the processing unit 1710 is used to control the transceiver unit 1720 to send first configuration information to the terminal device, where the first configuration information is used to configure a first carrier and a second carrier for the terminal device; and send second configuration information to the terminal device, where the second configuration information is used to configure X BWPs for the terminal device, where X is a positive integer; wherein the link direction of the first carrier, the second carrier, and the X BWPs are the same, the first carrier is located in a first sub-band of a first frequency band, the second carrier is located in a second sub-band of the first frequency band, and the first sub-band is discontinuous with the second sub-band; the X BWPs include a first BWP, the frequency resources of the first BWP are continuous, and overlap with both the first carrier and the second carrier; and N of the X BWPs are activated simultaneously, where N is an integer greater than 1.

[0308] In a possible implementation method, a frequency domain starting position of the first BWP is located within a carrier with a lower frequency position between the first carrier and the second carrier.

[0309] In a possible implementation method, the second configuration information includes indication information, where the indication information is used to indicate the carrier where the frequency domain starting position of the first BWP is located.

[0310] In a possible implementation method, the second configuration information includes the intra-carrier offset of the first BWP and the bandwidth size of the first BWP.

[0311] In one possible implementation method, the second configuration information includes RIV and a first parameter value, and the RIV and the first parameter are used to determine the intra-carrier offset of the first BWP and the bandwidth size of the first BWP, and the first parameter is not less than the size of the frequency resource range occupied by the first carrier and the second carrier.

[0312] In one possible implementation method, only the valid resources within the first BWP can be used for data transmission, and the valid resources within the first BWP refer to the overlapping part of the frequency resources of the first BWP and the frequency resources of the first carrier and / or the second carrier, and the valid resources within the first BWP include the first valid resources located on the first carrier and / or the second valid resources located on the second carrier.

[0313] In a possible implementation method, the PRBs in the first BWP are numbered consecutively; or the PRBs in the valid resources of the first BWP are numbered consecutively.

[0314] In a possible implementation method, the size of the RBG is determined according to the number of PRBs included in the valid resources within the first BWP.

[0315] In a possible implementation method, a first precoding codebook is used for PDSCH transmission or PUSCH transmission in the first valid resources, and a second precoding codebook is used in the second valid resources.

[0316] In one possible implementation method, a first resource is used within the first valid resource for downlink measurement and / or a second resource is used for measurement reporting, and a third resource is used within the second valid resource for downlink measurement and / or a fourth resource is used for measurement reporting; wherein, the first resource is different from the third resource.

[0317] In a possible implementation method, a fifth resource is used within the first effective resource to perform uplink measurement, and a sixth resource is used within the second effective resource to perform uplink measurement; wherein the fifth resource is different from the sixth resource.

[0318] When the communication device 1700 is used to implement the functions of the terminal device in the above method embodiment, the processing unit 1710 is used to control the transceiver unit 1720 to receive first configuration information from the network device, where the first configuration information is used to configure a first carrier and a second carrier for the terminal device; and receive second configuration information from the network device, where the second configuration information is used to configure X BWPs for the terminal device, where X is a positive integer; wherein the link direction of the first carrier, the second carrier, and the X BWPs are the same, the first carrier is located in a first sub-band of a first frequency band, the second carrier is located in a second sub-band of the first frequency band, and the first sub-band is discontinuous with the second sub-band; the X BWPs include a first BWP, the frequency resources of the first BWP are continuous, and overlap with both the first carrier and the second carrier; and N of the X BWPs are activated simultaneously, where N is an integer greater than 1.

[0319] In a possible implementation method, a frequency domain starting position of the first BWP is located within a carrier with a lower frequency position between the first carrier and the second carrier.

[0320] In a possible implementation method, the second configuration information includes indication information, where the indication information is used to indicate the carrier where the frequency domain starting position of the first BWP is located.

[0321] In a possible implementation method, the second configuration information includes the intra-carrier offset of the first BWP and the bandwidth size of the first BWP.

[0322] In one possible implementation method, the second configuration information includes RIV and a first parameter value, and the RIV and the first parameter are used to determine the intra-carrier offset of the first BWP and the bandwidth size of the first BWP, and the first parameter is not less than the size of the frequency resource range occupied by the first carrier and the second carrier.

[0323] In one possible implementation method, only the valid resources within the first BWP can be used for data transmission, and the valid resources within the first BWP refer to the overlapping part of the frequency resources of the first BWP and the frequency resources of the first carrier and / or the second carrier, and the valid resources within the first BWP include the first valid resources located on the first carrier and / or the second valid resources located on the second carrier.

[0324] In a possible implementation method, the PRBs in the first BWP are numbered consecutively; or the PRBs in the valid resources of the first BWP are numbered consecutively.

[0325] In a possible implementation method, the size of the RBG is determined according to the number of PRBs included in the valid resources within the first BWP.

[0326] In a possible implementation method, a first precoding codebook is used for PDSCH transmission or PUSCH transmission in the first valid resources, and a second precoding codebook is used in the second valid resources.

[0327] In one possible implementation method, a first resource is used within the first valid resource for downlink measurement and / or a second resource is used for measurement reporting, and a third resource is used within the second valid resource for downlink measurement and / or a fourth resource is used for measurement reporting; wherein, the first resource is different from the third resource.

[0328] In a possible implementation method, a fifth resource is used within the first effective resource to perform uplink measurement, and a sixth resource is used within the second effective resource to perform uplink measurement; wherein the fifth resource is different from the sixth resource.

[0329] For a more detailed description of the processing unit 1710 and the transceiver unit 1720, reference can be made to the relevant description in the above method embodiment, which will not be repeated here.

[0330] The communication device 1800 shown in FIG18 includes a processor 1810 and an interface circuit 1820. The processor 1810 and the interface circuit 1820 are coupled to each other. It is understood that the interface circuit 1820 may be a transceiver or an input / output interface. Optionally, the communication device 1800 may further include a memory 1830 for storing instructions executed by the processor 1810, or storing input data required by the processor 1810 to execute instructions, or storing data generated after the processor 1810 executes instructions.

[0331] When the communication device 1800 is used to implement the above method embodiment, the processor 1810 is used to implement the functions of the above processing unit 1710 , and the interface circuit 1820 is used to implement the functions of the above transceiver unit 1720 .

[0332] 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.

[0333] The method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disks, mobile hard disks, compact disc read-only memory (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 storage medium can be located in an ASIC. In addition, the ASIC can be located in a terminal device or a network device. Of course, the processor and storage medium can also exist as discrete components in an access network device or a terminal.

[0334] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. A computer program refers to a set of instructions that instruct an electronic computer or other device with message processing capabilities to perform each step of the action, usually written in a certain programming language and running on a certain target architecture. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer program or instruction can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instruction can be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired or wireless means. 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 or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; an optical medium, such as a digital video disk; or a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include both volatile and non-volatile types of storage media.

[0335] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0336] In this application, "at least one" means one or more, and "more" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character " / " generally indicates that the previous and next related objects are in an "or" relationship; in the formulas of this application, the character " / " indicates that the previous and next related objects are in a "division" relationship.

[0337] It is understood that the various numbers used in the embodiments of this application are merely for ease of description and are not intended to limit the scope of the embodiments of this application. The order of the sequence numbers of the above-mentioned processes does not necessarily imply a specific order of execution; the order of execution of the processes should be determined by their functions and inherent logic.

Claims

1. A communication method, characterized in that: The method comprises: Sending first configuration information to a terminal device, where the first configuration information is used to configure a first carrier and a second carrier for the terminal device; Sending second configuration information to the terminal device, where the second configuration information is used to configure X bandwidth parts BWP for the terminal device, where X is an integer greater than 1; The link directions of the first carrier, the second carrier and the X BWPs are the same, the first carrier is located in a first sub-band of a first frequency band, the second carrier is located in a second sub-band of the first frequency band, and the first sub-band is discontinuous with the second sub-band; M of the X BWPs are located in the first carrier, and the other XM of the X BWPs are located in the second carrier; N of the X BWPs are activated simultaneously, M is a positive integer, XM is a positive integer, and N is an integer greater than 1.

2. The method according to claim 1, characterized in that The identifier of each of the X BWPs includes a first part and a second part, the first parts of the identifiers of the X BWPs are the same, and the second parts of the identifiers of the X BWPs are different from each other.

3. The method according to claim 2, characterized in that The method further comprises: Downlink control information DCI is sent to the terminal device, where the DCI is used to activate the N BWPs.

4. The method according to claim 3, characterized in that The BWP indication field of the DCI includes a first field and a second field, the first field is used to indicate a first part of the identifiers of the N BWPs, and the second field is used to indicate a second part of the identifiers of the N BWPs.

5. The method according to claim 4, characterized in that The second domain includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

6. The method according to claim 4, characterized in that The second field includes a second portion of the identification of the N BWPs.

7. The method according to claim 3, characterized in that The DCI includes a first BWP indication field and a second BWP indication field, the first BWP indication field is used to indicate a first part of the identifiers of the N BWPs, and the second BWP indication field is used to indicate a second part of the identifiers of the N BWPs.

8. The method according to claim 7, characterized in that The second BWP indication field includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

9. The method according to claim 7, characterized in that The second BWP indication field includes a second part of the identifiers of the N BWPs.

10. The method according to claim 2, characterized in that The method further comprises: Sending a first signaling and a DCI to the terminal device, where the first signaling is used to indicate a first part of an identifier of N BWPs among the X BPWs, and the DCI is used to indicate a second part of an identifier of the N BWPs, wherein the first signaling is a radio resource control RRC signaling, a system information block SIB, a master information block MIB, or a media access control element MAC CE.

11. The method according to claim 1, characterized in that Each of the X BWPs has a unique identifier.

12. The method according to claim 11, characterized in that The method further comprises: Sending a DCI to the terminal device, where the DCI is used to activate the N BWPs.

13. The method according to claim 12, characterized in that The DCI includes N BWP indication fields, and each of the N BWP indication fields is used to indicate an identifier of a BWP among the N BWPs.

14. The method according to claim 12, characterized in that The DCI includes a BWP indication field, the BWP indication field includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

15. The method according to claim 12, characterized in that The DCI includes a BWP indication field, and the BWP indication field includes identifiers of the N BWPs.

16. A communication method, characterized in that: The method comprises: Receiving first configuration information from a network device, where the first configuration information is used to configure a first carrier and a second carrier for a terminal device; receiving second configuration information from the network device, where the second configuration information is used to configure X bandwidth parts BWP for the terminal device, where X is an integer greater than 1; The link directions of the first carrier, the second carrier and the X BWPs are the same, the first carrier is located in a first sub-band of a first frequency band, the second carrier is located in a second sub-band of the first frequency band, and the first sub-band is discontinuous with the second sub-band; M of the X BWPs are located in the first carrier, and the other XM of the X BWPs are located in the second carrier; N of the X BWPs are activated simultaneously, M is a positive integer, XM is a positive integer, and N is an integer greater than 1.

17. The method according to claim 16, characterized in that The identifier of each of the X BWPs includes a first part and a second part, the first parts of the identifiers of the X BWPs are the same, and the second parts of the identifiers of the X BWPs are different from each other.

18. The method according to claim 17, characterized in that The method further comprises: Downlink control information DCI is received from the network device, where the DCI is used to activate the N BWPs.

19. The method according to claim 18, characterized in that The BWP indication field of the DCI includes a first field and a second field, the first field is used to indicate a first part of the identifiers of the N BWPs, and the second field is used to indicate a second part of the identifiers of the N BWPs.

20. The method of claim 19, wherein: The second domain includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

21. The method of claim 19, wherein: The second field includes a second portion of the identification of the N BWPs.

22. The method of claim 18, wherein: The DCI includes a first BWP indication field and a second BWP indication field, the first BWP indication field is used to indicate a first part of the identifiers of the N BWPs, and the second BWP indication field is used to indicate a second part of the identifiers of the N BWPs.

23. The method of claim 22, wherein: The second BWP indication field includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

24. The method of claim 22, wherein: The second BWP indication field includes a second part of the identifiers of the N BWPs.

25. The method of claim 17, wherein: The method further comprises: Receive first signaling and DCI from the network device, where the first signaling is used to indicate a first part of an identifier of N BWPs among the X BPWs, and the DCI is used to indicate a second part of an identifier of the N BWPs, wherein the first signaling is radio resource control RRC signaling, a system information block SIB, a master information block MIB, or a media access control element MAC CE.

26. The method of claim 16, wherein: Each of the X BWPs has a unique identifier.

27. The method of claim 26, wherein: The method further comprises: A DCI is received from the network device, where the DCI is used to activate the N BWPs.

28. The method of claim 27, wherein: The DCI includes N BWP indication fields, and each of the N BWP indication fields is used to indicate an identifier of a BWP among the N BWPs.

29. The method of claim 27, wherein: The DCI includes a BWP indication field, the BWP indication field includes X bits, the X bits correspond one-to-one to the X BWPs, N bits of the X bits take a first value, the first value indicates that the corresponding BWP is activated, and the other XN bits of the X bits take a second value, and the second value indicates that the corresponding BWP is not activated.

30. The method of claim 27, wherein: The DCI includes a BWP indication field, and the BWP indication field includes identifiers of the N BWPs.

31. The method according to any one of claims 1 to 30, characterized in that Some or all of the following parameters of the X BWPs are the same: Frequency resource parameters, channel parameters or signal parameters of BWP.

32. The method according to any one of claims 1 to 31, characterized in that The switching delay between the X BWPs is less than a first threshold; Wherein, when the subcarrier spacing is 15 kHz, the first threshold is equal to the duration of 1 time slot or the duration of 3 time slots; When the subcarrier spacing is 30 kHz, the first threshold is equal to the duration of 2 time slots or the duration of 5 time slots; When the subcarrier spacing is 60 kHz, the first threshold is equal to the duration of 3 time slots or the duration of 9 time slots; When the subcarrier spacing is 120 kHz, the first threshold is equal to the duration of 6 time slots or the duration of 18 time slots.

33. A communication method, characterized in that: The method comprises: Sending first configuration information to a terminal device, where the first configuration information is used to configure a first carrier and a second carrier for the terminal device; Sending second configuration information to the terminal device, where the second configuration information is used to configure X bandwidth parts BWP for the terminal device, where X is a positive integer; The link directions of the first carrier, the second carrier and the X BWPs are the same, the first carrier is located in a first sub-band of a first frequency band, the second carrier is located in a second sub-band of the first frequency band, and the first sub-band is discontinuous with the second sub-band; the X BWPs include a first BWP, the frequency resources of the first BWP are continuous, and overlap with both the first carrier and the second carrier; N of the X BWPs are activated simultaneously, where N is an integer greater than 1.

34. A communication method, characterized in that: The method comprises: Receiving first configuration information from a network device, where the first configuration information is used to configure a first carrier and a second carrier for a terminal device; receiving second configuration information from the network device, where the second configuration information is used to configure X bandwidth parts BWP for the terminal device, where X is a positive integer; The link directions of the first carrier, the second carrier and the X BWPs are the same, the first carrier is located in a first sub-band of a first frequency band, the second carrier is located in a second sub-band of the first frequency band, and the first sub-band is discontinuous with the second sub-band; the X BWPs include a first BWP, the frequency resources of the first BWP are continuous, and overlap with both the first carrier and the second carrier; N of the X BWPs are activated simultaneously, where N is an integer greater than 1.

35. The method according to claim 33 or 34, characterized in that A frequency domain start position of the first BWP is located within a carrier with a lower frequency position between the first carrier and the second carrier.

36. The method according to claim 33 or 34, characterized in that The second configuration information includes indication information, where the indication information is used to indicate the carrier where the frequency domain starting position of the first BWP is located.

37. The method according to any one of claims 33 to 36, characterized in that The second configuration information includes an intra-carrier offset of the first BWP and a bandwidth size of the first BWP.

38. The method according to any one of claims 33 to 36, characterized in that The second configuration information includes a resource indication value RIV and a first parameter value, the RIV and the first parameter are used to determine the intra-carrier offset of the first BWP and the bandwidth size of the first BWP, and the first parameter is not less than the size of the frequency resource range occupied by the first carrier and the second carrier.

39. The method according to any one of claims 33 to 38, characterized in that Only valid resources within the first BWP can be used for data transmission. The valid resources within the first BWP refer to the overlapping parts of the frequency resources of the first BWP and the frequency resources of the first carrier and / or the second carrier. The valid resources within the first BWP include first valid resources located at the first carrier and / or second valid resources located at the second carrier.

40. The method of claim 39, wherein: The physical resource blocks (PRBs) in the first BWP are numbered consecutively; or, The consecutive numbers of PRBs in the valid resources of the first BWP.

41. The method according to claim 39 or 40, characterized in that The size of the resource block group RBG is determined according to the number of PRBs included in the valid resources within the first BWP.

42. The method according to any one of claims 39 to 41, characterized in that The first precoding codebook is used for PDSCH transmission or PUSCH transmission in the first valid resources, and the second precoding codebook is used in the second valid resources.

43. The method according to any one of claims 39 to 42, characterized in that Use a first resource within the first valid resource to perform downlink measurement and / or use a second resource to perform measurement reporting, and use a third resource within the second valid resource to perform downlink measurement and / or use a fourth resource to perform measurement reporting; wherein the first resource is different from the third resource.

44. The method according to any one of claims 39 to 43, characterized in that A fifth resource is used within the first effective resource to perform uplink measurement, and a sixth resource is used within the second effective resource to perform uplink measurement; wherein the fifth resource is different from the sixth resource.

45. A communication device, characterized in that: Comprising a module for performing the method of any one of claims 1 to 15, 31 to 32, or the method of any one of claims 16 to 32, or the method of any one of claims 33, 35 to 44, or the method of any one of claims 34 to 44.

46. ​​A communication device, characterized in that: The invention comprises a processor and an interface circuit, wherein the processor is used to communicate with other devices through the interface circuit and execute the method described in any one of claims 1 to 15, 31 to 32, or execute the method described in any one of claims 16 to 32, or execute the method described in any one of claims 33, 35 to 44, or execute the method described in any one of claims 34 to 44.

47. A computer program product, characterized in that The computer program product comprises instructions which, when executed on a processor, cause the processor to execute the method described in any one of claims 1 to 15, 31 to 32, or the method described in any one of claims 16 to 32, or the method described in any one of claims 33, 35 to 44, or the method described in any one of claims 34 to 44.

48. A computer-readable storage medium, characterized in that The storage medium stores a computer program or instruction. When the computer program or instruction is executed by the communication device, it implements the method described in any one of claims 1 to 15, 31 to 32, or implements the method described in any one of claims 16 to 32, or implements the method described in any one of claims 33, 35 to 44, or implements the method described in any one of claims 34 to 44.

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