Method and device for determining bandwidth part switching

Abstract

The present disclosure provides a method and device for determining bandwidth part (BWP) switching. The method comprises: determining downlink control information (DCI) for multi-carrier scheduling; on the basis of a BWP indication domain in the DCI, determining a target BWP ID; and for a cell corresponding to each effective frequency domain resource FDRA domain in the DCI, if the target BWP ID is different from an active BWP ID of the cell corresponding to the effective FDRA domain, determining to perform BWP switching on the cell corresponding to the effective FDRA domain. According to the method and device for determining BWP switching provided by the present disclosure, in a multi-carrier scheduling scenario, it can be effectively determined whether to perform BWP switching on a cell.

Description

Method and device for determining partial bandwidth switching

[0001] This disclosure claims priority to a Chinese patent application filed with the Patent Office of China on February 8, 2024, with application number 202410177320.8 and application name “Method and Device for Determining Partial Bandwidth Switching,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the field of communication technology, and in particular to a method and device for determining partial bandwidth switching. Background Art

[0003] In the relevant New Radio (NR) system, because each downlink control information (DCI) is used to schedule only one carrier, the BWP indication field in the DCI applies only to the corresponding scheduled carrier. When the BWP indicated by the bandwidth part (BWP) indication field in the downlink control information (DCI) is different from the currently active BWP, the terminal device performs BWP switching and pre-processes each information field in the DCI according to the configuration corresponding to the target BWP (the switched BWP), and then decodes each information field in the DCI.

[0004] To conserve Physical Downlink Control Channel (PDCCH) resources, a DCI capable of scheduling multiple carriers (hereinafter referred to as multi-carrier scheduling DCI or simply DCI) has been introduced. This DCI is used to schedule one or more carriers. However, when multi-carrier scheduling indicates BWP handover, there may be a discrepancy between the base station and the terminal regarding whether to perform BWP handover in a cell, resulting in reduced transmission accuracy and thus impacting network throughput.

[0005] Therefore, in a multi-carrier scheduling scenario, related technologies cannot effectively determine whether a cell performs BWP switching. Summary of the Invention

[0006] The present disclosure provides a method and apparatus for determining partial bandwidth switching, which solves the problem that related technologies cannot effectively determine whether a cell performs BWP switching in a multi-carrier scheduling scenario.

[0007] In a first aspect, the present disclosure provides a method for determining partial bandwidth switching, applied to a terminal device, the method comprising:

[0008] Determining downlink control information DCI for multi-carrier scheduling;

[0009] Determine a target BWP ID according to the partial bandwidth BWP indication field in the DCI;

[0010] For each cell corresponding to the valid frequency domain resource FDRA domain in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, it is determined that the cell corresponding to the valid FDRA domain performs BWP switching.

[0011] In the disclosed embodiment, the terminal device determines the target BWP (here, the BWP after switching) ID based on the received or acquired DCI, and then determines whether the cell performs BWP switching by comparing the target BWP ID with the active BWP ID of the cell corresponding to the valid FDRA domain. That is, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, the cell performs BWP switching; if the target BWP ID is the same as the active BWP ID of the cell corresponding to the valid FDRA domain, the cell does not perform BWP switching. This ensures that in a multi-carrier scheduling scenario, it is possible to effectively determine whether a cell performs BWP switching.

[0012] In some embodiments, if the DCI does not include a scheduled carrier indication field, the method further includes:

[0013] For each cell in the DCI, determine whether the FDRA field of the cell is valid by performing any one of the following operations:

[0014] determining, according to the FDRA domain information of the cell and the FDRA domain type corresponding to the active BWP of the cell, whether the FDRA domain of the cell in the DCI is valid;

[0015] Determining whether the FDRA field of the cell in the DCI is valid according to the FDRA field information of the cell and the FDRA field type configured by the target BWP;

[0016] Determine whether the FDRA field of the cell in the DCI is valid according to the pre-processed FDRA field information of each cell and the FDRA field type configured by the target BWP.

[0017] In some embodiments, if the DCI includes a scheduled carrier indication field, the method further includes:

[0018] According to the scheduling carrier indication field, determining that the cell corresponding to the scheduling carrier indication field is a cell of the first BWP to be switched;

[0019] Determine whether the cell to which the BWP is to be switched performs BWP switching by performing any of the following operations:

[0020] If the target BWP ID is different from the active BWP ID of the cell of the first BWP to be switched, determining to perform BWP switching on the cell of the first BWP to be switched;

[0021] Determining whether the FDRA domain of the cell to which the first BWP is to be switched is valid according to the FDRA domain information of the cell to which the first BWP is to be switched and the FDRA domain type corresponding to the active BWP of the cell to which the first BWP is to be switched, and if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determining to perform BWP switching on the cell corresponding to the valid FDRA domain;

[0022] Determine, based on the FDRA domain information of the cell of the first BWP to be switched and the FDRA domain type configured by the target BWP, whether the FDRA domain of the cell of the first BWP to be switched is valid; if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determine to perform BWP switching on the cell corresponding to the valid FDRA domain;

[0023] According to the pre-processed FDRA domain information of the cell of the first BWP to be switched and the FDRA domain type configured by the target BWP, determine whether the FDRA domain of the cell of the first BWP to be switched is valid; if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determine that the cell corresponding to the valid FDRA domain performs BWP switching.

[0024] In the embodiment of the present disclosure, depending on whether the DCI includes a scheduled carrier indication field, it is possible to determine whether each cell in the DCI performs BWP switching in different ways or based on different scenarios, thereby being able to effectively and accurately determine whether the cell performs BWP switching in a variety of scenarios.

[0025] In some embodiments, the method further comprises:

[0026] For each cell corresponding to the invalid FDRA field in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the invalid FDRA field, and it is determined that the cell corresponding to the invalid FDRA field is the cell indicated by the DCI for signaling indication, then determining that the cell corresponding to the invalid FDRA field is the cell of the second BWP to be switched;

[0027] Determine a cell with the smallest cell number from the cells of the second BWP to be switched, and determine that the cell with the smallest cell number performs BWP switching;

[0028] The cell indicated by the signaling is any one of the following:

[0029] Indicates the cell where the enhanced Type-3 codebook is triggered by the terminal device;

[0030] The cell indicated by the HARQ-ACK codebook retransmission;

[0031] Dormant community.

[0032] In the disclosed embodiment, for each cell corresponding to an invalid FDRA field in the DCI, cells for signaling indication, where the active BWP ID of the cell used for signaling indication is different from the target BWP ID, are obtained from the cells corresponding to all invalid FDRA fields in the DCI. The cell with the smallest cell number is determined from the obtained cells, and the cell with the smallest cell number performs BWP switching. This implements effective judgment on whether BWP switching is performed for the cell corresponding to the invalid FDRA field.

[0033] In some embodiments, pre-processing the FDRA domain information of each cell in the DCI includes:

[0034] For each cell in the DCI, when the FDRA field length corresponding to the target BWP is greater than the FDRA field length corresponding to the active BWP, if the first condition is met, 1 is added to the FDRA field until the length of the FDRA field is the same as that of the target BWP, and the pre-processed FDRA field information is obtained; if the first condition is not met, 0 is added to the FDRA field until the length of the FDRA field is the same as that of the target BWP, and the pre-processed FDRA field information is obtained; wherein, the first condition is that the FDRA field type configured for the target BWP is Type 1 or Type 2 and the subcarrier spacing is 15 kHz, and the FDRA field information in the DCI is all 1;

[0035] If the FDRA domain length corresponding to the target BWP is smaller than the FDRA domain length corresponding to the active BWP, read the information of the lowest corresponding bits in the FDRA domain information in the DCI that is the same as the FDRA domain length corresponding to the target BWP, and use the read information as the preprocessed FDRA domain information.

[0036] In an embodiment of the present disclosure, if the FDRA domain length corresponding to the target BWP is different from the FDRA domain length corresponding to the active BWP of the cell in the DCI, in order to ensure that the FDRA domain of the cell in the DCI can be effectively and accurately judged to be valid, the FDRA domain length corresponding to the target BWP can be compared with the FDRA domain length corresponding to the active BWP of the cell in the DCI. If the FDRA domain length corresponding to the target BWP is greater than the FDRA domain length corresponding to the active BWP, it is determined whether the first condition is met. If the first condition is met, 1 is added to the FDRA domain of the cell until it is the same as the FDRA domain length corresponding to the target BWP. Otherwise, 0 is added to the FDRA domain of the cell until it is the same as the FDRA domain length corresponding to the target BWP to obtain the pre-processed FDRA domain information; if the FDRA domain length corresponding to the target BWP is less than the FDRA domain length corresponding to the active BWP, the terminal device reads the lowest few bits of information in the FDRA domain of the cell that are the same as the FDRA domain length corresponding to the target BWP as the pre-processed FDRA domain information.

[0037] In some embodiments, the method further comprises:

[0038] Determine whether the BWP indication field in the DCI is valid through high-layer signaling configuration; or

[0039] Whether the BWP indication field in the DCI is valid is determined through dynamic indication information in the DCI, where the dynamic indication information is indicated by configuring a new DCI field in the DCI or by reusing an existing indication field in the DCI.

[0040] In the embodiments of the present disclosure, whether the BWP indication field in the DCI is valid (i.e., whether the BWP indication field in the DCI is valid / invalid) can be notified to the terminal through high-layer signaling configuration, or the validity / invalidity of the BWP indication field can be dynamically indicated in the DCI. Multiple methods are implemented to determine or indicate whether the BWP indication field in the DCI is valid.

[0041] In some embodiments, the terminal device supports the BWP switching capability of the DCI, or the terminal device does not support the BWP switching capability of the DCI.

[0042] In some embodiments, the information used to determine the BWP switching capability of the DCI includes first reporting information and second reporting information;

[0043] Among them, the first reporting information is used to indicate that the terminal device supports the BWP switching capability of the DCI; the second reporting information is used to indicate that the terminal does not support the BWP switching capability of the DCI.

[0044] In some embodiments, the BWP switching capability of the DCI is indicated by a bitmap;

[0045] The number of bits in the bitmap is the same as the maximum value of the scheduled cells in the DCI supported cell group;

[0046] For each bit position, the bit position includes a first state or a second state, the first state is used to indicate that the cell corresponding to the bit position supports the BWP switching capability of the DCI; the second state is used to indicate that the cell corresponding to the bit position does not support the BWP switching capability of the DCI.

[0047] In an embodiment of the present disclosure, a terminal device may have a BWP switching capability based on a multi-carrier scheduling DCI, or may not have a BWP switching capability based on a multi-carrier scheduling DCI; whether the terminal device has a BWP switching capability based on a multi-carrier scheduling DCI may be reported to the base station through two types of information (first reporting information and second reporting information), and may be indicated through a bitmap. When the terminal device has a BWP switching capability based on a multi-carrier scheduling DCI, the terminal device may perform BWP switching on one or more carriers according to the indication in the BWP indication field in the DCI; when the terminal device does not have a BWP switching capability based on a multi-carrier scheduling DCI, the terminal ignores the indication in the BWP indication field.

[0048] In some embodiments, each cell indicated by the DCI includes at least an activated cell indicated by the DCI.

[0049] In some embodiments, each cell indicated by the DCI includes a deactivated cell and a sleeping cell indicated by the DCI.

[0050] In a second aspect, the present disclosure provides a method for determining partial bandwidth switching, which is applied to a base station, the method comprising:

[0051] Determining downlink control information DCI for multi-carrier scheduling;

[0052] The DCI is sent to the terminal device; wherein the DCI is used by the terminal device to determine the target BWP ID according to the partial bandwidth BWP indication field in the DCI, and for each cell corresponding to the valid FDRA field in the DCI, when the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA field, determine that the cell corresponding to the valid FDRA field performs BWP switching.

[0053] In the disclosed embodiment, the base station first determines the DCI and then sends the DCI to the terminal. The terminal device determines the target BWP (here, the BWP after switching) ID based on the received or acquired DCI, and then determines whether the cell performs BWP switching by comparing the target BWP ID with the active BWP ID of the cell corresponding to the valid FDRA domain. That is, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, the cell performs BWP switching; if the target BWP ID is the same as the active BWP ID of the cell corresponding to the valid FDRA domain, the cell does not perform BWP switching. This ensures that in a multi-carrier scheduling scenario, it is possible to effectively determine whether a cell performs BWP switching.

[0054] In some embodiments, the DCI includes indication information of a cell used for signaling indication; wherein the cell used for signaling indication is any one of the following:

[0055] Indicates the cell where the enhanced Type-3 codebook is triggered by the terminal device;

[0056] The cell indicated by the HARQ-ACK codebook retransmission;

[0057] Sleeping quarters.

[0058] In some embodiments, the method further comprises:

[0059] Whether the BWP indication field in the DCI is valid is configured by high-layer signaling; or

[0060] Whether the BWP indication field in the DCI is valid is dynamically indicated in the DCI, where the dynamic indication includes configuring a new DCI field in the DCI for indication or reusing an existing indication field in the DCI for indication.

[0061] In the embodiments of the present disclosure, whether the BWP indication field in the DCI is valid (i.e., whether the BWP indication field in the DCI is valid / invalid) can be notified to the terminal through high-layer signaling configuration, or the validity / invalidity of the BWP indication field can be dynamically indicated in the DCI. Multiple methods are implemented to determine or indicate whether the BWP indication field in the DCI is valid.

[0062] In a third aspect, the present disclosure provides a device for determining partial bandwidth switching, the device being applied to a terminal device, the device comprising:

[0063] A first processing unit, configured to determine downlink control information DCI for multi-carrier scheduling;

[0064] A second processing unit is configured to determine a target BWP ID according to a partial bandwidth BWP indication field in the DCI;

[0065] For each cell corresponding to a valid FDRA domain in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, it is determined that the cell corresponding to the valid FDRA domain performs BWP switching.

[0066] In the disclosed embodiment, the terminal device determines the target BWP (here, the BWP after switching) ID based on the received or acquired DCI, and then determines whether the cell performs BWP switching by comparing the target BWP ID with the active BWP ID of the cell corresponding to the valid FDRA domain. That is, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, the cell performs BWP switching; if the target BWP ID is the same as the active BWP ID of the cell corresponding to the valid FDRA domain, the cell does not perform BWP switching. This ensures that in a multi-carrier scheduling scenario, it is possible to effectively determine whether a cell performs BWP switching.

[0067] In a fourth aspect, the present disclosure provides a device for determining partial bandwidth switching, applied to a base station, the device comprising:

[0068] a determining unit, configured to determine downlink control information DCII for multi-carrier scheduling;

[0069] A sending unit is used to send the DCI to the terminal device; wherein the DCI is used by the terminal device to determine the target BWP ID according to the partial bandwidth BWP indication field in the DCI, and for each cell corresponding to the valid FDRA field in the DCI, when the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA field, determine that the cell corresponding to the valid FDRA field performs BWP switching.

[0070] In the disclosed embodiment, the base station first determines the DCI and then sends the DCI to the terminal. The terminal device determines the target BWP (here, the BWP after switching) ID based on the received or acquired DCI, and then determines whether the cell performs BWP switching by comparing the target BWP ID with the active BWP ID of the cell corresponding to the valid FDRA domain. That is, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, the cell performs BWP switching; if the target BWP ID is the same as the active BWP ID of the cell corresponding to the valid FDRA domain, the cell does not perform BWP switching. This ensures that in a multi-carrier scheduling scenario, it is possible to effectively determine whether a cell performs BWP switching.

[0071] In a fifth aspect, the present disclosure provides a device for determining partial bandwidth switching, applied to a terminal device, the device including a memory, a transceiver, and a processor:

[0072] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0073] Determining downlink control information DCI for multi-carrier scheduling;

[0074] Determine a target BWP ID according to the partial bandwidth BWP indication field in the DCI;

[0075] For each cell corresponding to a valid FDRA domain in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, it is determined that the cell corresponding to the valid FDRA domain performs BWP switching.

[0076] In the disclosed embodiment, the terminal device determines the target BWP (here, the BWP after switching) ID based on the received or acquired DCI, and then determines whether the cell performs BWP switching by comparing the target BWP ID with the active BWP ID of the cell corresponding to the valid FDRA domain. That is, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, the cell performs BWP switching; if the target BWP ID is the same as the active BWP ID of the cell corresponding to the valid FDRA domain, the cell does not perform BWP switching. This ensures that in a multi-carrier scheduling scenario, it is possible to effectively determine whether a cell performs BWP switching.

[0077] In a sixth aspect, the present disclosure provides a device for determining partial bandwidth switching, which is applied to a base station. The device includes: a memory, a transceiver, and a processor:

[0078] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0079] Determining downlink control information DCI for multi-carrier scheduling;

[0080] The DCI is sent to the terminal device; wherein the DCI is used by the terminal device to determine the target BWP ID according to the partial bandwidth BWP indication field in the DCI, and for each cell corresponding to the valid FDRA field in the DCI, when the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA field, determine that the cell corresponding to the valid FDRA field performs BWP switching.

[0081] In the disclosed embodiment, the base station first determines the DCI and then sends the DCI to the terminal. The terminal device determines the target BWP (here, the BWP after switching) ID based on the received or acquired DCI, and then determines whether the cell performs BWP switching by comparing the target BWP ID with the active BWP ID of the cell corresponding to the valid FDRA domain. That is, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, the cell performs BWP switching; if the target BWP ID is the same as the active BWP ID of the cell corresponding to the valid FDRA domain, the cell does not perform BWP switching. This ensures that in a multi-carrier scheduling scenario, it is possible to effectively determine whether a cell performs BWP switching.

[0082] In a seventh aspect, the present disclosure provides a non-transitory readable storage medium, wherein the non-transitory readable storage medium stores a computer program, and the computer program is used to enable a processor to execute any of the methods described above.

[0083] The present disclosure provides a method and apparatus for determining partial bandwidth switching. The method first determines downlink control information (DCI) for multi-carrier scheduling, then determines a target BWP ID based on the partial bandwidth BWP indication field in the DCI. For each cell corresponding to a valid FDRA field in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA field, the method determines whether BWP switching is to be performed in the cell corresponding to the valid FDRA field. Therefore, the target BWP ID can be determined based on the BWP indication field in the DCI. The method then determines whether BWP switching is to be performed in the cell by comparing the target BWP ID with the active BWP ID of the cell corresponding to the valid FDRA field. This effectively determines whether BWP switching is to be performed in the cell in a multi-carrier scheduling scenario.

[0084] It should be understood that the contents described in the above summary of the invention are not intended to limit the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become easier to understand through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0086] FIG1 is a schematic flow chart of a method for determining partial bandwidth switching provided by an embodiment of the present disclosure;

[0087] FIG2 is an interactive diagram of a method for determining partial bandwidth switching provided by an embodiment of the present disclosure;

[0088] FIG3 is a schematic flow chart of a method for determining partial bandwidth switching according to another embodiment of the present disclosure;

[0089] FIG4 is a first structural diagram of a device for determining partial bandwidth switching provided by an embodiment of the present disclosure;

[0090] FIG5 is a second structural diagram of a device for determining partial bandwidth switching provided by an embodiment of the present disclosure;

[0091] FIG6 is a third structural diagram of a device for determining partial bandwidth switching provided by an embodiment of the present disclosure;

[0092] FIG7 is a fourth structural diagram of the apparatus for determining partial bandwidth switching provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0093] In the embodiments of the present disclosure, the term "and / or" describes the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0094] In the embodiments of the present disclosure, the term "plurality" refers to two or more than two, and other quantifiers are similar thereto.

[0095] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure and not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0096] In order to clearly understand the technical solutions of the present disclosure, the solutions of related technologies are first introduced in detail.

[0097] To conserve Physical Downlink Control Channel (PDCCH) resources, a DCI for multi-carrier scheduling (hereinafter referred to as multi-carrier scheduling DCI or DCI) was introduced to schedule one or more scheduled carriers. However, when multi-carrier scheduling indicates BWP switching, there may be a problem where the base station and the terminal have different understandings of whether to perform BWP switching in the cell, resulting in reduced transmission accuracy and thus affecting network throughput. Therefore, in multi-carrier scheduling scenarios, related technologies cannot effectively determine whether a cell performs BWP switching.

[0098] Based on the above research, the present disclosure proposes a method and apparatus for determining partial bandwidth switching. The terminal device determines the target BWP ID based on the BWP indication field in the DCI. If the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA field, the terminal device determines that the cell corresponding to the valid FDRA field performs BWP switching. Therefore, based on the BWP indication field in the DCI, the target BWP ID can be determined. Then, by comparing the target BWP ID with the active BWP ID of the cell corresponding to the valid FDRA field to see if they are the same, it is determined whether the cell performs BWP switching. This effectively determines whether the cell performs BWP switching in multi-carrier scheduling scenarios.

[0099] Among them, the method and the device are based on the same concept. Since the principles of solving problems by the method and the device are similar, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0100] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0101] 1 is a flow chart of a method for determining partial bandwidth switching provided by an embodiment of the present disclosure. The method for determining partial bandwidth switching provided by this embodiment is executed by a terminal device, and the method for determining partial bandwidth switching is described in detail.

[0102] Step 101: Determine downlink control information DCI for multi-carrier scheduling.

[0103] The DCI may include a BWP indication field, FDRA field information of each cell in the DCI, and may also include a scheduled carrier indication field, or may not include a scheduled carrier indication field, etc.

[0104] Step 102: Determine a target BWP ID according to the partial bandwidth BWP indication field in the DCI.

[0105] According to the BWP indication field in the DCI, the BWP ID after the cell handover is performed, ie, the target BWP ID, can be determined.

[0106] Step 103: For each cell corresponding to the valid frequency domain resource FDRA domain in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determine to perform BWP switching on the cell corresponding to the valid FDRA domain.

[0107] In the embodiment of the present disclosure, in combination with FIG2 , FIG2 is an interactive schematic diagram of a method for determining partial bandwidth switching provided by the embodiment of the present disclosure.

[0108] Step 1. The base station determines the DCI;

[0109] Step 2. The base station sends DCI to the terminal device;

[0110] Step 3. The terminal device determines whether to perform BWP switching for each cell indicated by the DCI based on the DCI.

[0111] In some embodiments, the terminal device determines the target BWP (here, the BWP after switching) ID based on the received or acquired DCI, and then determines whether the cell performs BWP switching by comparing the target BWP ID with the active BWP ID of the cell corresponding to the valid FDRA domain. That is, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, it is determined that the terminal performs BWP switching on the cell; if the target BWP ID is the same as the active BWP ID of the cell corresponding to the valid FDRA domain, it is determined that the cell does not need to perform BWP switching. This achieves the ability to effectively determine whether a cell performs BWP switching in a multi-carrier scheduling scenario.

[0112] It should be noted that the order of comparing the target BWP ID with the active BWP ID of the cell and determining whether the FDRA field of the cell is valid is not limited and can be determined according to the actual scenario. For example, 1. First compare the target BWP ID with the active BWP ID of the cell. If they are different, determine whether the FDRA field of the cell is valid, and then determine whether the cell performs BWP switching; 2. Determine whether the FDRA field of the cell is valid, and then compare the active BWP ID of the cell corresponding to the valid FDRA field with the target BWP ID, or compare the active BWP ID of the cell corresponding to the invalid FDRA field with the target BWP ID, and then determine whether the cell performs BWP switching. The following will not be repeated.

[0113] In some embodiments, if the DCI does not include a scheduled carrier indication field, the method further includes:

[0114] For each cell in the DCI, determine whether the FDRA field of the cell is valid by performing any one of the following operations:

[0115] Determining whether the FDRA field of the cell in the DCI is valid according to the FDRA field information of the cell and the FDRA field type corresponding to the active BWP of the cell;

[0116] Determining whether the FDRA field of the cell in the DCI is valid according to the FDRA field information of the cell and the FDRA field type configured by the target BWP; or

[0117] Determine whether the FDRA field of each cell in the DCI is valid according to the pre-processed FDRA field information of each cell and the FDRA field type configured by the target BWP.

[0118] In the embodiment of the present disclosure, if the DCI does not include the scheduled carrier indication field, the following three methods can be used to determine whether the FDRA field of each cell in the DCI is valid:

[0119] Method 1: Determine whether the FDRA domain of the cell is valid based on the FDRA domain information of the cell and the FDRA domain type corresponding to the active BWP of the cell;

[0120] Method 2: Preprocess the FDRA domain information of the cell to obtain preprocessed FDRA domain information, and determine whether the FDRA domain of this cell is valid based on the preprocessed FDRA domain information and the FDRA domain type configured by the target BWP.

[0121] Method 3: Determine whether the FDRA domain of the cell is valid by judging the FDRA domain information of the cell and the FDRA domain type configured by the target BWP.

[0122] Among them, for each cell corresponding to a valid FDRA domain in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, it is determined that the cell corresponding to the valid FDRA domain performs BWP switching; if the target BWP ID is the same as the active BWP ID of the cell corresponding to the valid FDRA domain, it is determined that the cell corresponding to the valid FDRA domain does not perform BWP switching.

[0123] For each cell corresponding to an invalid FDRA domain in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the invalid FDRA domain, and it is determined that the cell corresponding to the invalid FDRA domain is the cell indicated by the DCI for signaling indication, then the cell corresponding to the invalid FDRA domain is determined to be the cell of the second BWP to be switched; the cell with the smallest cell number is determined from the cells of the second BWP to be switched, and the cell with the smallest cell number is determined to perform BWP switching.

[0124] In some embodiments, the target BWP ID is searched from the cells corresponding to the invalid FDRA field of the DCI, and the active BWP ID of the cell corresponding to the invalid FDRA field is different, and the cell corresponding to the invalid FDRA field is the cell with the smallest cell number among the cells indicated by the DCI for signaling indication, and the cell with the smallest cell number is determined to perform BWP switching.

[0125] In some embodiments, if the DCI includes a scheduled carrier indication field, the method further includes:

[0126] According to the scheduled carrier indication field, determining that the cell corresponding to the scheduled carrier indication field is a cell of the first BWP to be switched;

[0127] Determine whether the cell to which the BWP is to be switched performs BWP switching by performing any of the following operations:

[0128] If the target BWP ID is different from the active BWP ID of the cell of the first BWP to be switched, determining to perform BWP switching on the cell of the first BWP to be switched;

[0129] Determining whether the FDRA domain of the cell to which the first BWP is to be switched is valid according to the FDRA domain information of the cell to which the first BWP is to be switched and the FDRA domain type corresponding to the active BWP of the cell to which the first BWP is to be switched, and if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determining to perform BWP switching on the cell corresponding to the valid FDRA domain;

[0130] Determine, based on the FDRA domain information of the cell of the first BWP to be switched and the FDRA domain type configured by the target BWP, whether the FDRA domain of the cell of the first BWP to be switched is valid; if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determine to perform BWP switching on the cell corresponding to the valid FDRA domain;

[0131] According to the pre-processed FDRA domain information of the cell of the first BWP to be switched and the FDRA domain type configured by the target BWP, determine whether the FDRA domain of the cell of the first BWP to be switched is valid; if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determine that the cell corresponding to the valid FDRA domain performs BWP switching.

[0132] In the embodiment of the present disclosure, if the DCI includes a scheduled carrier indication field, determining whether each cell in the DCI is valid can be achieved in the following four ways:

[0133] Method 1: According to the scheduled carrier indication field, determine the cell corresponding to the scheduled carrier indication field (here refers to the cell of the first BWP to be switched); compare the target BWP ID with the active BWP ID of the cell corresponding to the scheduled carrier indication field. If the target BWP ID is different from the active BWP ID of the cell corresponding to the scheduled carrier indication field, determine that the cell performs BWP switching; if the target BWP ID is the same as the active BWP ID of the cell corresponding to the scheduled carrier indication field, determine that the cell of the first BWP to be switched does not perform BWP switching.

[0134] Method 2: Determine the cell corresponding to the scheduled carrier indication domain (here refers to the cell of the first BWP to be switched) according to the scheduled carrier indication domain; determine whether the FDRA domain of this cell is valid according to the FDRA domain information of the cell corresponding to the scheduled carrier indication domain and the FDRA domain type corresponding to the active BWP of this cell. If the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determine that the cell corresponding to the valid FDRA domain performs BWP switching; if the target BWP ID is the same as the active BWP ID of the cell corresponding to the valid FDRA domain, determine that the cell corresponding to the valid FDRA domain does not perform BWP switching.

[0135] Method 3: Determine the cell corresponding to the scheduled carrier indication domain (here refers to the cell of the first BWP to be switched) according to the scheduled carrier indication domain; determine whether the FDRA domain of the cell of the first BWP to be switched is valid according to the FDRA domain information of the cell of the first BWP to be switched and the FDRA domain type configured by the target BWP; if the FDRA domain of the cell of the first BWP to be switched is valid, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determine that the cell corresponding to the valid FDRA domain performs BWP switching.

[0136] Method 4: Determine the cell corresponding to the scheduled carrier indication domain (here refers to the cell of the first BWP to be switched) according to the scheduled carrier indication domain; determine whether the FDRA domain of the cell of the first BWP to be switched is valid according to the pre-processed FDRA domain information of the cell of the first BWP to be switched and the FDRA domain type configured by the target BWP; if the FDRA domain of the cell of the first BWP to be switched is valid, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determine that the cell corresponding to the valid FDRA domain performs BWP switching.

[0137] Therefore, depending on whether the DCI includes a scheduled carrier indication field, whether each cell in the DCI performs BWP switching can be determined in different ways or based on different scenarios, which can effectively and accurately determine whether the cell performs BWP switching in multiple scenarios or situations.

[0138] In some embodiments, the method further comprises:

[0139] For each cell corresponding to the invalid FDRA field in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the invalid FDRA field, and it is determined that the cell corresponding to the invalid FDRA field is the cell indicated by the DCI for signaling indication, then determining that the cell corresponding to the invalid FDRA field is the cell of the second BWP to be switched;

[0140] Determine a cell with the smallest cell number from the cells of the second BWP to be switched, and determine that the cell with the smallest cell number performs BWP switching;

[0141] The cell indicated by the signaling is any one of the following:

[0142] Indicates the cell where the enhanced Type-3 codebook is triggered by the terminal device;

[0143] The cell indicated by the HARQ-ACK codebook retransmission;

[0144] Dormant cell (here refers to the cell of SCell dormancy).

[0145] In the disclosed embodiment, for each cell corresponding to an invalid FDRA field in the DCI, cells for signaling indication, where the active BWP ID of the cell used for signaling indication is different from the target BWP ID, are obtained from the cells corresponding to all invalid FDRA fields in the DCI. The cell with the smallest cell number is determined from the obtained cells, and the cell with the smallest cell number performs BWP switching. This implements effective judgment on whether BWP switching is performed for the cell corresponding to the invalid FDRA field.

[0146] In some embodiments, pre-processing the FDRA domain information of each cell in the DCI includes:

[0147] For each cell in the DCI, when the FDRA field length corresponding to the target BWP is greater than the FDRA field length corresponding to the active BWP, if the first condition is met, 1 is added to the FDRA field until the length of the FDRA field is the same as that of the target BWP, and the pre-processed FDRA field information is obtained; if the first condition is not met, 0 is added to the FDRA field until the length of the FDRA field is the same as that of the target BWP, and the pre-processed FDRA field information is obtained; wherein, the first condition is that the FDRA field type configured for the target BWP is Type 1 or Type 2 and the subcarrier spacing is 15 kHz, and the FDRA field information in the DCI is all 1;

[0148] If the FDRA domain length corresponding to the target BWP is smaller than the FDRA domain length corresponding to the active BWP, read the information of the lowest corresponding bits in the FDRA domain information in the DCI that is the same as the FDRA domain length corresponding to the target BWP, and use the read information as the preprocessed FDRA domain information.

[0149] In an embodiment of the present disclosure, if the FDRA domain length corresponding to the target BWP is different from the FDRA domain length corresponding to the active BWP of the cell in the DCI, in order to ensure that the FDRA domain of the cell in the DCI can be effectively and accurately judged to be valid, the FDRA domain length corresponding to the target BWP can be compared with the FDRA domain length corresponding to the active BWP of the cell in the DCI. If the FDRA domain length corresponding to the target BWP is greater than the FDRA domain length corresponding to the active BWP, it is determined whether the first condition is met. If the first condition is met, 1 is added to the FDRA domain of the cell until it is the same as the FDRA domain length corresponding to the target BWP. Otherwise, 0 is added to the FDRA domain of the cell until it is the same as the FDRA domain length corresponding to the target BWP to obtain the pre-processed FDRA domain information; if the FDRA domain length corresponding to the target BWP is less than the FDRA domain length corresponding to the active BWP, the terminal device reads the lowest few bits of information in the FDRA domain of the cell that are the same as the FDRA domain length corresponding to the target BWP as the pre-processed FDRA domain information.

[0150] In some embodiments, the method further comprises:

[0151] Determine whether the BWP indication field in the DCI is valid through high-layer signaling configuration; or

[0152] Whether the BWP indication field in the DCI is valid is determined through dynamic indication information in the DCI, where the dynamic indication information is indicated by configuring a new DCI field in the DCI or by reusing an existing indication field in the DCI.

[0153] In the embodiments of the present disclosure, whether the BWP indication field in the DCI is valid (i.e., whether the BWP indication field in the DCI is valid / invalid) can be notified to the terminal through high-layer signaling configuration, or the validity / invalidity of the BWP indication field can be dynamically indicated in the DCI. Multiple methods are implemented to determine or indicate whether the BWP indication field in the DCI is valid.

[0154] In some embodiments, the terminal device supports the BWP switching capability of the DCI, or the terminal device does not support the BWP switching capability of the DCI.

[0155] In some embodiments, the information used to determine the BWP switching capability of the DCI includes first reporting information and second reporting information;

[0156] Among them, the first reporting information is used to indicate that the terminal device supports the BWP switching capability of the DCI; the second reporting information is used to indicate that the terminal does not support the BWP switching capability of the DCI.

[0157] In some embodiments, the BWP switching capability of the DCI is indicated by a bitmap;

[0158] The number of bits in the bitmap is the same as the maximum value of the scheduled cells in the DCI supported cell group;

[0159] For each bit position, the bit position includes a first state or a second state, the first state is used to indicate that the cell corresponding to the bit position supports the BWP switching capability of the DCI; the second state is used to indicate that the cell corresponding to the bit position does not support the BWP switching capability of the DCI.

[0160] In an embodiment of the present disclosure, a terminal device may have a BWP switching capability based on a multi-carrier scheduling DCI, or may not have a BWP switching capability based on a multi-carrier scheduling DCI; whether the terminal device has a BWP switching capability based on a multi-carrier scheduling DCI may be reported to the base station through two types of information (first reporting information and second reporting information), and may be indicated through a bitmap. When the terminal device has a BWP switching capability based on a multi-carrier scheduling DCI, the terminal device may perform BWP switching on one or more carriers according to the indication in the BWP indication field in the DCI; when the terminal device does not have a BWP switching capability based on a multi-carrier scheduling DCI, the terminal ignores the indication in the BWP indication field.

[0161] In some embodiments, each cell indicated by the DCI includes at least an activated cell indicated by the DCI.

[0162] In some embodiments, each cell indicated by the DCI includes a deactivated cell and a sleeping cell indicated by the DCI.

[0163] In the present disclosure, when the multi-carrier scheduling DCI includes a BWP indication field and includes a scheduled carrier indication field, the terminal determines whether each cell performs BWP switching by comparing the BWP ID in the BWP indication field with the active BWP ID of each cell corresponding to the scheduled carrier indication field, and / or the FDRA field of each cell. When the multi-carrier DCI includes a BWP indication field and does not include a scheduled carrier indication field, the terminal determines whether each cell performs BWP switching by comparing the BWP ID in the BWP indication field with the active BWP ID and / or FDRA field of the cell.

[0164] Therefore, the present disclosure proposes a FDRA domain validity / invalidity judgment scheme for multi-carrier scheduling BWP switching, which is used to solve the problem of unclear judgment of FDRA validity / invalidity in the multi-carrier scheduling indication BWP switching scenario, avoid the situation where the base station and the terminal have inconsistent understanding of valid FDRA / invalid FDRA, and realize that in the multi-carrier scheduling scenario, it is possible to effectively determine whether the cell performs BWP switching.

[0165] In some embodiments, another embodiment of the present disclosure provides a method for determining partial bandwidth switching, which is applied to a terminal device. The method includes:

[0166] Determining downlink control information DCI for multi-carrier scheduling;

[0167] Determine a target BWP ID according to the partial bandwidth BWP indication field in the DCI;

[0168] If the DCI includes a scheduled carrier indication field, the target BWP ID in the BWP indication field is compared with the active BWP ID of each cell corresponding to the scheduled carrier indication field. If the target BWP ID and the active BWP ID of the cell are the same, the cell does not need to (or does not) perform BWP switching. If the target BWP ID and the active BWP ID of the cell are different, the cell performs BWP switching.

[0169] If the DCI does not include a scheduled carrier indication field, determining whether each cell in the DCI performs BWP switching is performed by the following operations:

[0170] Comparing the target BWP ID of the BWP indication field with the active BWP ID of the cell corresponding to the valid FDRA (herein, valid FDRA) field, if the target BWP ID of the cell and the active BWP ID of the cell corresponding to the valid FDRA field are the same, the cell does not need to (or does not) perform BWP switching; if the target BWP ID of the cell and the active BWP ID of the cell corresponding to the valid FDRA field are different, the cell performs BWP switching; and / or,

[0171] According to the comparison between the target BWP ID of the BWP indication field and the invalid FDRA field but the active BWP ID of the corresponding cell used for signaling, if the target BWP ID of the cell and the invalid FDRA (here refers to invalid FDRA) field but the active BWP ID of the corresponding cell used for signaling are the same, the cell does not need to (or does not) perform BWP switching; if the target BWP ID of the cell and the invalid FDRA field but the active BWP ID of the corresponding cell used for signaling are different, the cell performs BWP switching, or determines the cell with the smallest cell number from the cells that have the invalid FDRA field but the active BWP ID used for signaling to indicate the corresponding cell and are different from the target BWP ID, and performs BWP switching.

[0172] In some embodiments, the method further comprises:

[0173] For each cell in the DCI, determine whether the FDRA domain of the cell is valid based on the resource allocation type corresponding to the active BWP of the cell (here refers to the FDRA domain type corresponding to the active BWP of the cell) and the FDRA domain information in the DCI.

[0174] In the embodiment of the present disclosure, the method for determining partial bandwidth switching can be implemented by the following method 1:

[0175] The terminal device determines the actual scheduled and / or indicated cell based on the scheduled cell indication field (here refers to the scheduled carrier indication field), or determines the actual scheduled and / or indicated cell based on the FDRA indication information and the FDRA field type of the active BWP when there is no scheduled cell indication field. The terminal determines whether the cell performs BWP switching by comparing the target BWP ID and the active BWP ID of the actual scheduled and / or indicated cell.

[0176] Method 1 can be implemented in the following two scenarios:

[0177] Method 1-1: If the multi-carrier scheduling DCI includes a scheduled carrier indication field, the terminal compares the target BWP ID in the BWP indication field with the active BWP ID of the cell corresponding to the scheduled carrier indication field. If the target BWP ID and active BWP ID of the cell are the same, no BWP switching is performed. If the target BWP ID and active BWP ID of the scheduled cell are different, the terminal performs BWP switching for the cell indicated by the scheduled carrier.

[0178] The terminal reads and interprets DCI in the following order:

[0179] Cell set indication field (if any) → scheduled cell indication field → BWP indication field; this order is merely exemplary and does not limit the order of reading and interpreting DCI. The following order of reading and interpreting DCI is also not limited and will not be repeated.

[0180] Therefore, for DCI 1_3 with a scheduled cell indication field, it is simpler to use method 1-1 to determine BWP switching, and there is no need to perform the valid FDRA determination step.

[0181] Method 1-2: If the multi-carrier scheduling DCI does not include a scheduling carrier indication field, the terminal device compares the target BWP ID of the BWP indication field with the active BWP ID of the cell corresponding to the valid FDRA field and / or the active BWP ID of the invalid FDRA field but corresponding to the cell used for signaling indication (for example, the cell corresponding to the invalid FDRA field that is used for signaling indication and has the smallest cell number). If the target BWP ID and the active BWP ID of the cell are the same, there is no need to perform BWP switching; if the target BWP ID and the active BWP ID of the cell are different, the terminal performs BWP switching on this cell. Valid FDRA and invalid FDRA are determined based on the resource allocation type corresponding to the active BWP and the FDRA field information in the DCI.

[0182] The terminal device reads and interprets DCI in the following order:

[0183] Cell set indication field → valid FDRA field + invalid FDRA field (invalid FDRA field with the smallest cell number used for signaling → BWP indication field)

[0184] In some embodiments, another embodiment of the present disclosure provides a method for determining partial bandwidth switching, which is applied to a terminal device, and the method includes:

[0185] Determining downlink control information DCI for multi-carrier scheduling;

[0186] Determine a target BWP ID according to the partial bandwidth BWP indication field in the DCI;

[0187] If the DCI includes a scheduled carrier indication field, determine the cell corresponding to the scheduled carrier indication field, and compare the target BWP ID of the BWP indication field with the active BWP ID of the cell corresponding to the valid FDRA field in the cell corresponding to the scheduled carrier indication field. If the target BWP ID and the active BWP ID of the cell are the same, the cell does not need to (or does not) perform BWP switching. If the target BWP ID and the active BWP ID of the cell are different, the cell performs BWP switching.

[0188] If the DCI does not include a scheduled carrier indication field, the following steps are performed to determine whether each cell in the DCI performs BWP switching:

[0189] According to the target BWP ID of the BWP indication field, the active BWP ID of the cell corresponding to the valid FDRA (here referring to the valid FDRA) field is compared. If the target BWP ID of the cell and the active BWP ID of the cell corresponding to the valid FDRA field are the same, the cell does not need to (or does not) perform BWP switching. If the target BWP ID of the cell and the active BWP ID of the cell corresponding to the valid FDRA field are different, the cell performs BWP switching.

[0190] In some embodiments, the method further comprises:

[0191] For each cell in the DCI, determine whether the FDRA domain of the cell is valid based on the resource allocation type corresponding to the active BWP of the cell (here refers to the FDRA domain type corresponding to the active BWP of the cell) and the FDRA domain information in the DCI.

[0192] In the embodiment of the present disclosure, the method for determining partial bandwidth switching can be implemented by the following method 2:

[0193] The terminal device determines the actual scheduling cell of multi-carrier scheduling (here refers to the cell corresponding to the scheduled cell indication field or the cell corresponding to the called carrier indication field) based on the scheduled cell indication field, or when there is no scheduled cell indication field, based on the FDRA indication information (here refers to the FDRA field information) and the FDRA field type of the active BWP. The terminal device then determines whether the cell performs BWP switching by comparing the target BWP ID with the active BWP ID of the actual scheduling cell.

[0194] Method 2 can be implemented in the following two scenarios:

[0195] Method 2-1: If the multi-carrier scheduling DCI includes a scheduled carrier indication field, the terminal device compares the active BWP ID of the valid FDRA cell with the target BWP ID of the BWP indication field and the scheduled carrier corresponding to the scheduled carrier indication field (here refers to the scheduled cell corresponding to the scheduled carrier indication field or the cell corresponding to the scheduled carrier indication field). If the target BWP ID and the active BWP ID of the scheduled cell are the same, there is no need to perform BWP switching; if the target BWP ID and the active BWP ID of the scheduled cell are different, the terminal performs BWP switching on the cell indicated by the scheduled carrier. Valid FDRA and invalid FDRA are determined based on the resource allocation type corresponding to the active BWP and the FDRA field information in the DCI.

[0196] The terminal reads and interprets DCI in the following order:

[0197] Cell set indication field → scheduled cell indication field → valid FDRA field → BWP indication field

[0198] Method 2-2: If the multi-carrier scheduling DCI does not include a scheduled carrier indication field, the terminal device uses the target BWP ID in the BWP indication field and the valid FDRA field to correspond to the active BWP ID of the cell. If the target BWP ID and active BWP ID of the cell are the same, no BWP handover is required. If the target BWP ID and active BWP ID of the cell are different, the terminal performs a BWP handover for that cell. The valid and invalid FDRA fields are determined based on the resource allocation type corresponding to the active BWP and the FDRA field in the DCI.

[0199] The terminal reads and interprets DCI in the following order:

[0200] Cell set indication field → valid FDRA field → BWP indication field.

[0201] Therefore, for DCI 1_3 without a scheduled cell indication field, method 2-2 is simpler to determine BWP switching. There is no need to determine the cell used for signaling indication based on high-level configuration conditions, that is, to perform the step of finding the invalid FDRA field used for indicating signaling and with the smallest cell number.

[0202] Among them, when the multi-carrier scheduling DCI (DCI format 1_3 / 0_3) includes a BWP indication field, for method 1 and method 2, the terminal device can first interpret the cell set indication, and then interpret the scheduled cell indication field, and / or the FDRA indication field (here refers to the FDRA field information) to obtain the multi-carrier scheduling DCI scheduling cell or indication cell. Next, the terminal device compares the target BWP ID and the active BWP ID of the multi-carrier scheduling DCI scheduling and / or indication cell. The above is only exemplary, and the order of comparing the BWP ID and determining whether the FDRA field of the cell is valid is not limited here.

[0203] In some embodiments, another embodiment of the present disclosure provides a method for determining partial bandwidth switching, which is applied to a terminal device, and the method includes:

[0204] Determining downlink control information DCI for multi-carrier scheduling;

[0205] Determine a target BWP ID according to the partial bandwidth BWP indication field in the DCI;

[0206] If the DCI does not include a scheduled carrier indication field, perform any of the following:

[0207] Based on the FDRA field type configured by the target BWP and the FDRA field information in the DCI, determine whether the FDRA field of the cell is valid, and determine whether to perform BWP switching for each cell in the DCI based on the result of whether the FDRA field of the cell is valid and the target BWP ID;

[0208] Based on the FDRA field type and pre-processed FDRA field information configured by the target BWP, determine whether the pre-processed FDRA field of the cell is valid, and determine whether to perform BWP switching for each cell in the DCI based on the result of whether the pre-processed FDRA field of the cell is valid and the target BWP ID.

[0209] In some embodiments, if the DCI does not include a scheduled carrier indication field, the method further includes:

[0210] For each cell in the DCI, determine whether the FDRA field of the cell is valid by performing any one of the following operations:

[0211] determining, according to the FDRA domain information of the cell and the FDRA domain type corresponding to the active BWP of the cell, whether the FDRA domain of the cell in the DCI is valid;

[0212] Determining whether the FDRA field of the cell in the DCI is valid according to the FDRA field information of the cell and the FDRA field type configured by the target BWP;

[0213] Determine whether the FDRA field of the cell in the DCI is valid according to the pre-processed FDRA field information of each cell and the FDRA field type configured by the target BWP.

[0214] In some embodiments, the method further comprises:

[0215] For each cell corresponding to the invalid FDRA field in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the invalid FDRA field, and it is determined that the cell corresponding to the invalid FDRA field is the cell indicated by the DCI for signaling indication, then determining that the cell corresponding to the invalid FDRA field is the cell of the second BWP to be switched;

[0216] Determine a cell with the smallest cell number from the cells of the second BWP to be switched, and determine that the cell with the smallest cell number performs BWP switching;

[0217] The cell indicated by the signaling is any one of the following:

[0218] Indicates the cell where the enhanced Type-3 codebook is triggered by the terminal device;

[0219] The cell indicated by the HARQ-ACK codebook retransmission;

[0220] Dormant community.

[0221] In some embodiments, pre-processing the FDRA domain information of each cell in the DCI includes:

[0222] For each cell in the DCI, when the FDRA field length corresponding to the target BWP is greater than the FDRA field length corresponding to the active BWP, if the first condition is met, 1 is added to the FDRA field until the length of the FDRA field is the same as that of the target BWP, and the pre-processed FDRA field information is obtained; if the first condition is not met, 0 is added to the FDRA field until the length of the FDRA field is the same as that of the target BWP, and the pre-processed FDRA field information is obtained; wherein, the first condition is that the FDRA field type configured for the target BWP is Type 1 or Type 2 and the subcarrier spacing is 15 kHz, and the FDRA field information in the DCI is all 1;

[0223] If the FDRA domain length corresponding to the target BWP is smaller than the FDRA domain length corresponding to the active BWP, read the information of the lowest corresponding bits in the FDRA domain information in the DCI that is the same as the FDRA domain length corresponding to the target BWP, and use the read information as the preprocessed FDRA domain information.

[0224] In the embodiment of the present disclosure, the method for determining partial bandwidth switching can be implemented by the following method 3:

[0225] If the multi-carrier scheduling DCI does not include a scheduling cell indication, the terminal device determines the target BWP based on the BWP indication field and determines which cells undergo BWP switching according to the following method:

[0226] Method 3-1: The terminal device determines whether the corresponding carrier (here refers to the cell) performs BWP switching based on the FDRA field type configured by the target BWP and the FDRA field information in the DCI.

[0227] Method 3-2: The terminal device determines whether to perform BWP switching on the corresponding carrier based on the FDRA field type configured by the target BWP and the pre-processed FDRA field information. The pre-processing method of the FDRA field is as follows:

[0228] 1. When the FDRA field length corresponding to the target BWP is greater than the FDRA field length corresponding to the active BWP, if the FDRA field type configured by the BWP indicated by the DCI (also known as the target BWP) is Type 1 or Type 2 with a subcarrier spacing of 15kHz, and the FDRA field information in the DCI is all 1, then the FDRA field is supplemented with '1' until it is the same as the FDRA field length corresponding to the target BWP; otherwise, the FDRA field is supplemented with '0' until it is the same as the FDRA field length corresponding to the target BWP.

[0229] 2. When the length of the FDRA field corresponding to the target BWP is less than the length of the FDRA field corresponding to the active BWP, the terminal reads the lowest few bits of information in the FDRA field that are the same as the length of the FDRA field corresponding to the target BWP.

[0230] In method 3-1 or method 3-2, the method for determining whether the corresponding cell performs BWP switching is as follows:

[0231] Alt.1: If the FDRA field information corresponding to the cell is determined to be valid FDRA (and the active BWP ID of the cell corresponding to the valid FDRA is different from the target BWP ID), the terminal device performs BWP switching on this cell; otherwise, the terminal device does not perform BWP switching on this cell;

[0232] Alt.2: If the FDRA field information corresponding to the cell is valid FDRA or the FDRA field information corresponding to the cell is invalid FDRA but is used for signaling indication (and the active BWP ID of the cell corresponding to the valid FDRA is different from the target BWP ID), the terminal performs BWP switching on this cell (or the cell with the smallest cell number among the cells that meet the above conditions); otherwise, the terminal does not perform BWP switching on this cell.

[0233] The terminal device reads and interprets DCI in the following order:

[0234] Cell set indication field → BWP indication field → valid FDRA field.

[0235] In some embodiments, another embodiment of the present disclosure provides a method for determining partial bandwidth switching, which is applied to a terminal device, and the method includes:

[0236] Determining downlink control information DCI for multi-carrier scheduling;

[0237] Determine a target BWP ID according to the partial bandwidth BWP indication field in the DCI;

[0238] If the DCI includes a scheduling carrier indication field, determine the cell corresponding to the scheduled carrier indication field (herein, the scheduled cell / indicated cell), compare the target BWP ID determined according to the BWP indication field with the active BWP ID of the scheduled cell / indicated cell, and if the active BWP ID of the scheduled cell / indicated cell and the target BWP ID are different, determine that the scheduled cell / indicated cell is a cell to be subjected to BWP switching (herein, a cell in which BWP switching may occur); if the active BWP ID of the scheduled cell / indicated cell and the target BWP ID are the same, determine that the scheduled cell / indicated cell is a cell in which BWP switching is not to be performed;

[0239] Based on the FDRA domain type configured by the target BWP and the FDRA domain information of the cell to be BWP switched in the DCI, determine whether the FDRA domain of the cell to be BWP switched is valid, and determine whether the cell to be BWP switched in the DCI performs BWP switching based on the result of whether the FDRA domain of the cell to be BWP switched is valid and the target BWP ID; or, based on the FDRA domain type configured by the target BWP and the pre-processed FDRA domain information, determine whether the pre-processed FDRA domain of the cell to be BWP switched is valid, and determine whether the cell to be BWP switched in the DCI performs BWP switching based on the result of whether the pre-processed FDRA domain of the cell to be BWP switched is valid and the target BWP ID.

[0240] In the embodiment of the present disclosure, the method for determining partial bandwidth switching can be implemented by the following method 4:

[0241] If the multi-carrier scheduling DCI includes a scheduling cell indication (herein, the scheduled cell indication field), the terminal obtains the actual scheduled and / or indicated cell based on the scheduled cell indication field. The terminal device obtains the cell where BWP switching may occur based on the target BWP in the BWP indication field and the active BWP ID of the scheduled / indicated cell. The terminal then determines the cell where BWP switching may occur according to Method 3-1 / Method 3-2.

[0242] The terminal reads and interprets DCI in the following order:

[0243] Cell set indication field → scheduled cell indication field → BWP indication field → valid FDRA field.

[0244] In some embodiments, each cell indicated by the multi-carrier scheduling DCI includes at least an activated cell indicated by the multi-carrier scheduling DCI.

[0245] In some embodiments, the multi-carrier scheduling DCI includes a deactivated cell and a dormancy cell indicated by the multi-carrier scheduling DCI.

[0246] In some embodiments, all of the above methods (e.g., methods 1 to 4) and their sub-methods (e.g., method 1-1, method 1-2, method 2-1, method 2-2, method 3-1, method 3-2, etc.) can be combined in any manner and support various combinations based on high-level configuration / UE capabilities / protocol specifications. For example:

[0247] (1) Methods 1-1 and 1-2 are combined to achieve the effect of multi-carrier scheduling supporting the indicated cell and performing BWP switching. In addition, for the method of determining the scheduled cell based on the FDRA field, the terminal determines the scheduled cell based on the FDRA field type corresponding to the active BWP and the FDRA field information in the DCI.

[0248] (2) Method 2-1 and Method 2-2 are combined to achieve the effect that multi-carrier scheduling only indicates that the scheduled cell can perform BWP switching. In addition, for the method of determining the scheduled cell based on the FDRA field, the terminal device determines the scheduled cell based on the FDRA field type corresponding to the active BWP and the FDRA field information in the DCI.

[0249] (3) Method 4 is combined with Method 3-1 or Method 3-2 and alt1 to achieve the effect that multi-carrier scheduling only indicates that the scheduled cell can perform BWP switching. In addition, for the methods based on the scheduled cell indication and the FDRA field-based method of determining the scheduled cell, the terminal device determines the scheduled cell based on the FDRA field type corresponding to the target BWP.

[0250] (4) Method 1-1 and method 3-1 / method 3-2 and alt2 are combined to achieve the effect of carrier scheduling supporting the indicated cell and being able to perform BWP switching. In addition, for the method of determining the scheduled cell based on the FDRA field, the terminal device determines the scheduled cell based on the FDRA field type corresponding to the target BWP.

[0251] The scheduling cell refers to the cell where the network schedules the terminal to perform uplink or downlink data reception.

[0252] The indicated cell refers to the cell to which the network instructs the terminal to trigger enhanced Type-3 codebook / HARQ-ACK codebook retransmission indication / SCell dormancy.

[0253] The application scenarios of the present disclosure may include but are not limited to:

[0254] Scenario 1: DCI 1_3 includes a scheduled cell indication field and a BWP indication field. DCI 1_3 indicates that data is scheduled on one or more cells, indicates SCell dormancy indication on one cell, or triggers an enhanced Type-3 codebook, or retransmits an HARQ-ACK codebook.

[0255] Scenario 2: DCI 1_3 does not include the scheduled cell indication field and includes the BWP indication field. DCI 1_3 indicates that data is scheduled on one or more cells, indicates SCell dormancy indication on one cell, or enhanced Type-3 codebook triggering, or HARQ-ACK codebook retransmission, indicating that data is not scheduled on one or more cells.

[0256] Scenario 3: DCI 1_3 / 0_3 does not include the scheduled cell indication field and includes the BWP indication field. DCI 1_3 indicates that data is scheduled on one or more cells and indicates that data is not scheduled on one or more cells.

[0257] In addition, when some carriers in the combination perform BWP switching, the activated BWP numbers in the carrier combination will be inconsistent. Then, when the carrier combination is scheduled next time, some carriers in the carrier combination still need to perform BWP switching, which will cause a ping-pong effect of BWP switching. In order to solve the above problem, the present disclosure provides two solutions:

[0258] Solution 1: Use high-layer signaling to notify the terminal of the validity / invalidity of the BWP indication field in the DCI (DCI 0_3 / 1_3).

[0259] When the BWP indication field is configured to be invalid, no matter what value the BWP indication field indicates, the terminal will not perform BWP switching and will remain on the currently active BWP.

[0260] When the BWP indication field is configured to be valid, the terminal determines the target BWP index based on the indication value of the BWP indication field. The terminal determines whether to perform BWP switching in the cell based on whether the active BWP index of the cell is the same as the target BWP index and the FDRA field indication.

[0261] Solution 2: Dynamically indicate the validity / invalidity of the BWP indication field in the DCI, which at least includes introducing a new DCI field in the DCI, or reusing the existing indication field in the DCI for indication.

[0262] When the dynamic indication BWP indication field is invalid, no matter what value the BWP indication field indicates, the terminal device will not perform BWP switching and will remain on the currently active BWP.

[0263] When the dynamic indication BWP indication field is valid, the terminal determines the target BWP index based on the indication value of the BWP indication field. The terminal device determines whether the cell performs BWP switching based on whether the active BWP index and the target BWP index of the cell are the same and the FDRA field indication.

[0264] The following describes in detail the method for determining partial bandwidth switching through an embodiment, that is, based on the following assumptions, the method for determining partial bandwidth switching is described in detail (the terminal described below is a terminal device).

[0265] Assumption 1: The cell set corresponding to DCI 1_3 is cell set 1, corresponding to {CC1, CC2, CC3, CC4}. The FDRA field type corresponding to the BWP of each cell is shown in Table 1 below:

[0266] Table 1

[0267] Assumption 2: DCI 1_3 meets one of the following three conditions:

[0268] 1. If the DCI includes the one-shot HARQ-ACK request field set to '1', the terminal is provided with the pdsch-HARQ-ACK-EnhType3ToAddModList but the DCI does not include the enhanced Type 3 codebook indicator field;

[0269] 2. If the HARQ-ACK retransmission indicator field in the DCI is set to 1;

[0270] 3. If the DCI does not include the one-shot HARQ-ACK request field or the one-shot HARQ-ACK request field is set to '0', or if the DCI does not include the HARQ-ACK retransmission indicator or the HARQ-ACK retransmission indicator is set to '0', and the terminal is provided with the SCell dormancy indication configuration but the DCI does not include the SCell dormancy indication field.

[0271] DCI 1_3 uses the Type-2 type field of the cell corresponding to the smallest invalid FDRA to perform enhanced Type-3 codebook triggering / HARQ-ACK codebook retransmission indication / SCell dormancy indication.

[0272] Assumption 3: For the case where DCI 1_3 includes a scheduled cell indication field, the table configured by the higher layer is as follows: Table 2:

[0273] Table 2

[0274] In the present disclosure, the scheduled cell indication field is taken as an example with an index value of 1. The FDRA fields of {CC1, CC2, CC3} are '101100', '11111', and '0000000', respectively.

[0275] In the case where DCI 1_3 does not include the scheduled cell indication field, the FDRA fields corresponding to {CC1, CC2, CC3, CC4} are '101100', '111111', '0000000', and '000000', respectively.

[0276] For CC1, CC2, CC3 and CC4, the number of bits required in the FDRA field of the target BWP is greater than the number of bits in the FDRA field of the active BWP.

[0277] Assumption 4: The BWP indication in DCI 1_3 is BWP ID#2.

[0278] Exemplary embodiment 1 (corresponding to the embodiment of method 1 above)

[0279] If the multi-carrier scheduling DCI includes a scheduled carrier indication field, the terminal parses the field in DCI format 1_3 as follows:

[0280] Cell set indication field → scheduled cell indication field → BWP indication field

[0281] Step 1: The terminal parses the cell set indication field to obtain cell set 1, corresponding to carriers {CC1, CC2, CC3, CC4};

[0282] Step 2: The terminal parses the scheduled cell indication field and finds the value '1', which corresponds to the scheduled cell combination CC1, CC2 and CC3.

[0283] Step 3: The terminal parses the BWP indication field and obtains the target BWP ID, which is BWP ID = 2 for CC1, CC2, and CC3;

[0284] Step 4: The terminal performs BWP switching on CC1, CC2, and CC3, switching to BWP ID = 2;

[0285] Otherwise, if the multi-carrier scheduling DCI does not include the scheduled carrier indication field, the terminal parses the DCI format 1_3 field as follows:

[0286] Cell set indication field → valid FDRA field + invalid FDRA field of the minimum cell identification number → BWP indication field

[0287] Step 1: The terminal parses the cell set indication field to obtain cell set 1, corresponding to carriers {CC1, CC2, CC3, CC4};

[0288] Step 2: The terminal determines the carrier index corresponding to the valid FDRA domain based on the FDRA domain type configuration of each carrier's active BWP, and obtains CC1 and CC2. If the terminal meets condition 2, the terminal further determines the minimum carrier index of the invalid FDRA domain, that is, obtains CC3.

[0289] Step 3: The terminal parses the BWP indication field and compares the target BWP ID (BWP 2) with the active BWP ID (BWP 1) corresponding to the carrier number determined in step 2. For carriers with different BWP IDs, proceed to step 4.

[0290] Step 4: The terminal performs BWP switching on CC1, CC2, and CC3 and switches to BWP ID = 2.

[0291] Exemplary embodiment 2 (corresponding to the above method 2)

[0292] If the multi-carrier scheduling DCI includes a scheduled carrier indication field, the terminal parses the field in DCI format 1_3 as follows:

[0293] Cell set indication field → scheduled cell indication field → valid FDRA field → BWP indication field

[0294] Step 1: The terminal parses the cell set indication field to obtain cell set 1, corresponding to carriers {CC1, CC2, CC3, CC4};

[0295] Step 2: The terminal parses the scheduled cell indication field and finds the value '1', which corresponds to the scheduled cell combination CC1, CC2 and CC3.

[0296] Step 3: If the terminal meets condition 2, the terminal determines the carrier numbers corresponding to the valid FDRA field as CC1 and CC2 according to the FDRA field type configuration of each carrier active BWP.

[0297] Step 3: The terminal parses the BWP indication field and obtains the target BWP ID, which is BWP ID = 2 for CC1 and CC2. The active BWP ID = 1 on CC1 and CC2 is;

[0298] Step 4: The terminal performs BWP switching on CC1 and CC2 and switches to BWP ID = 2;

[0299] Otherwise, if the multi-carrier scheduling DCI does not include the scheduled carrier indication field, the terminal parses the DCI format 1_3 field as follows;

[0300] Cell set indication field → valid FDRA field → BWP indication field

[0301] Step 1: The terminal parses the cell set indication field to obtain cell set 1, corresponding to carriers {CC1, CC2, CC3, CC4};

[0302] Step 2: The terminal determines the carrier numbers corresponding to the valid FDRA field as CC1 and CC2 according to the FDRA field type configuration of each carrier's active BWP.

[0303] Step 3: The terminal parses the BWP indication field and compares the target BWP ID (BWP 2) with the active BWP ID (BWP 1) corresponding to the carrier number determined in step 2. For carriers with different BWP IDs, proceed to step 4.

[0304] Step 4: The terminal performs BWP switching on CC1 and CC2 and switches to BWP ID=2.

[0305] Exemplary embodiment 3 (corresponding to the above method 4)

[0306] If the multi-carrier scheduling DCI includes a scheduled carrier indication field, the terminal parses the field in DCI format 1_3 as follows (corresponding to a combination of method 4 and method 3-1):

[0307] Cell set indication field → scheduled cell indication field → BWP indication field → valid FDRA field

[0308] Step 1: The terminal parses the cell set indication field to obtain cell set 1, corresponding to carriers {CC1, CC2, CC3, CC4};

[0309] Step 2: The terminal parses the scheduled cell indication field and finds the value '1', which corresponds to the scheduled cell combination CC1, CC2 and CC3.

[0310] Step 3: If the terminal parses the BWP indication field and obtains the target BWP ID as BWP 2 and the active BWP of CC1, CC2, and CC3 is BWP1, the next step needs to be executed; otherwise, the next step is not required.

[0311] Step 4: If the terminal meets condition 2, the terminal determines the valid / invalid FDR field based on the FDRA field type corresponding to BWP2 of CC1, CC2, and CC3. If condition 2 is not met, the terminal directly proceeds to step 5. If the FDRA field corresponding to a single carrier in the DCI is all 1s (i.e., invalid FDRA), the next step is not required; otherwise, the FDRA field corresponding to a single carrier in the DCI is valid, and the next step is required. In this use case, the target BWP has a Type-1 FDRA field, CC2 is invalid FDRA, and CC1 and CC3 are valid FDRA.

[0312] Step 5: The terminal performs handover on the cell corresponding to the valid FDRA, that is, the terminal performs BWP handover on CC1 and CC3;

[0313] If the multi-carrier scheduling DCI includes a scheduled carrier indication field, the terminal parses the field in DCI format 1_3 as follows (corresponding to a combination of method 4 and method 3-2):

[0314] Cell set indication field → scheduled cell indication field → BWP indication field → valid FDRA field

[0315] Step 1: The terminal parses the cell set indication field to obtain cell set 1, corresponding to carriers {CC1, CC2, CC3, CC4};

[0316] Step 2: The terminal parses the scheduled cell indication field and finds the value '1', which corresponds to the scheduled cell combination CC1, CC2 and CC3.

[0317] Step 3: If the terminal parses the BWP indication field and obtains the target BWP ID as BWP 2 and the active BWP of CC1, CC2, and CC3 is BWP1, the next step needs to be executed; otherwise, the next step is not required.

[0318] Step 4: If the FDRA field corresponding to a single carrier in the DCI is all 1s, the high-order bits of the FDRA field are padded with '1s' until the field matches the FDRA field corresponding to the target BWP. Otherwise, the high-order bits of the FDRA field are padded with '0s' until the field matches the FDRA field corresponding to the target BWP. If the terminal meets Assumption 2, the terminal determines whether the FDRA field is valid or invalid based on the processed FDRA field and the target. Otherwise, the terminal proceeds directly to Step 5. In this embodiment, CC1 and CC3 are valid FDRAs, and CC2 is invalid FDRA.

[0319] Step 5: The terminal performs handover on the cell corresponding to the valid FDRA, that is, the terminal performs BWP handover on CC1 and CC3.

[0320] Exemplary embodiment 4 (corresponding to method 3-1)

[0321] If the multi-carrier scheduling DCI does not include the scheduled carrier indication field, the terminal parses the DCI format 1_3 field as follows:

[0322] Cell set indication field → BWP indication field → valid FDRA field

[0323] Step 1: The terminal parses the cell set indication field to obtain cell set 1, corresponding to carriers {CC1, CC2, CC3, CC4};

[0324] Step 2: The terminal parses the BWP indication field to obtain the target BWP as BWP2 and compares it with the active BWP. If the target BWP is different from the active BWP of a carrier, proceed to step 2.

[0325] Among them, the following are the third and fourth steps corresponding to Alt.1:

[0326] Step 3: The terminal determines the valid / invalid FDRA field based on the FDRA field type corresponding to the BWP2 of CC1, CC2, CC3, and CC4 and the FDRA field corresponding to each carrier in the DCI. In this embodiment, the FDRA field type corresponding to the BWP2 of CC1, CC2, CC3, and CC4 is Type-2. Based on the FDRA field corresponding to each carrier, CC1, CC3, and CC4 are valid FDRAs, while CC2 is all '1', indicating an invalid FDRA field.

[0327] Step 4: The terminal reads the BWP indication field. If the target carrier in the BWP indication field is different from the active carrier, the terminal performs handover on the cell corresponding to the valid FDRA, that is, the terminal performs BWP handover on CC1, CC3, and CC4.

[0328] Among them, the following are the third, fourth and fifth steps corresponding to Alt.2:

[0329] Step 3: The terminal determines the valid / invalid FDR field based on the FDRA field type corresponding to the BWP2 of CC1, CC2, CC3, and CC4 and the FDRA field corresponding to each carrier in the DCI. In this embodiment, the FDRA field type corresponding to the BWP2 of CC1, CC2, CC3, and CC4 is Type-2. Based on the FDRA field corresponding to each carrier, CC1, CC3, and CC4 are valid FDRAs, while CC2 is all '1', indicating an invalid FDRA field.

[0330] Step 4: If the terminal satisfies condition 2, the terminal further determines the minimum carrier number of the invalid FDRA domain. Otherwise, execute step 4. In this embodiment, condition 2 is satisfied, and the minimum carrier number of the invalid FDRA domain is CC2

[0331] Step 5: The terminal performs switching on the carrier corresponding to the valid FDRA and the minimum carrier number in the invalid FDRA field, that is, the terminal performs BWP switching on CC1, CC2, CC3 and CC4.

[0332] Exemplary embodiment 5 (corresponding to method 3-2)

[0333] If the multi-carrier scheduling DCI does not include the scheduled carrier indication field, the terminal parses the DCI format 1_3 field as follows:

[0334] Cell set indication field → valid FDRA field → BWP indication field

[0335] Step 1: The terminal parses the cell set indication field to obtain cell set 1, corresponding to carriers {CC1, CC2, CC3, CC4};

[0336] Step 2: The terminal parses the BWP indication field to obtain the target BWP as BWP2 and compares it with the active BWP. If the target BWP is different from the active BWP of a carrier, proceed to step 3.

[0337] Among them, the following are the third and fourth steps corresponding to Alt.1:

[0338] Step 3: The terminal determines whether the FDRA field is valid or invalid based on the FDRA field type and processed FDRA field corresponding to BWP2 of CC1, CC2, CC3, and CC4. The FDRA field is processed as follows: if the FDRA field corresponding to a single carrier in the DCI is all 1s, the upper bits of the FDRA field are padded with '1s' until they match the FDRA field corresponding to the target BWP; otherwise, the upper bits of the FDRA field are padded with '0s' until they match the FDRA field corresponding to the target BWP. In this embodiment, the FDRA field type corresponding to BWP2 of CC1, CC2, CC3, and CC4 is Type-2. CC1, CC3, and CC4 padded with '0s' in the upper bits until they match the FDRA field corresponding to the target BWP, while CC2 padded with '1s' in the upper bits until they match the FDRA field corresponding to the target BWP. Based on the processed FDRA field corresponding to each carrier, CC1, CC3, and CC4 are valid FDRA fields, while CC2 is an all-1 field, indicating an invalid FDRA field.

[0339] Step 4: The terminal reads the BWP indication field. If the target carrier in the BWP indication field is different from the active carrier, the terminal performs handover on the cell corresponding to the valid FDRA, that is, the terminal performs BWP handover on CC1, CC3, and CC4.

[0340] Among them, the following are the third, fourth and fifth steps corresponding to Alt.2:

[0341] Step 3: The terminal determines the valid / invalid FDR field based on the FDRA field type corresponding to the BWP2 of CC1, CC2, CC3, and CC4 and the FDRA field corresponding to each carrier in the DCI. In this embodiment, the FDRA field type corresponding to the BWP2 of CC1, CC2, CC3, and CC4 is Type-2. Based on the FDRA field corresponding to each carrier, CC1, CC3, and CC4 are valid FDRAs, while CC2 is all '1', indicating an invalid FDRA field.

[0342] Step 4: If the terminal satisfies condition 2, the terminal further determines the minimum carrier number of the invalid FDRA field. Otherwise, step 4 is executed. In this embodiment, condition 2 is satisfied, and the minimum carrier number of the invalid FDRA field is CC2;

[0343] Step 5: The terminal performs switching on the carrier corresponding to the valid FDRA and the minimum carrier number in the invalid FDRA field, that is, the terminal performs BWP switching on CC1, CC2, CC3 and CC4.

[0344] Exemplary embodiment 6 (corresponding to the sub-scheme of method 1-2)

[0345] The terminal does not expect the network to use DCI1-3 to simultaneously indicate BWP switching and use the DCI field corresponding to the invalid FDRA field cell to indicate enhanced Type-3 codebook triggering / HARQ-ACK codebook retransmission indication / SCell dormancy indication.

[0346] Cell set indication field → valid FDRA field → BWP indication field

[0347] Step 1: The terminal parses the cell set indication field to obtain cell set 1, corresponding to carriers {CC1, CC2, CC3, CC4};

[0348] Step 2: The terminal determines the carrier index corresponding to the valid FDRA field according to the FDRA field type configuration of each carrier's active BWP, and obtains CC1 and CC2. If the terminal meets condition 2, the terminal does not need to obtain other DCI fields corresponding to the minimum carrier index of the invalid FDRA field;

[0349] Step 3: The terminal parses the BWP indication field and compares the target BWP ID (BWP 2) with the active BWP ID (BWP 1) corresponding to the carrier number determined in step 2. For carriers with different BWP IDs, proceed to step 4.

[0350] Step 4: The terminal performs BWP switching on CC1 and CC2 and switches to BWP ID=2.

[0351] Exemplary embodiment 7 (corresponding to the BWP indication field valid / invalid solution)

[0352] For the above solution 1, the validity / invalidity of the BWP indication field is indicated by a UE-specific RRC parameter.

[0353] If the network indicates to the terminal that the BWP indication field is invalid through UE-specific RRC parameters, even if the BWP indication field exists in DCI 0_3 / 1_3, the terminal continues to maintain the active BWP of each carrier to send and receive data / indications regardless of the value indicated by the BWP indication field.

[0354] If the network indicates to the terminal that the BWP indication field is valid through UE-specific RRC parameters, the terminal determines the target BWP index based on the BWP indication field in DCI 0_3 / 1_3. The terminal determines whether to perform BWP switching based on whether the active BWP index of the cell and the target BWP index are the same.

[0355] For the above solution 2: a new indication field or a multiplexing-related indication field in the DCI is used to indicate whether the BWP indication field is valid or invalid.

[0356] For example, the BWP indication field is extended and 1 bit is added to indicate whether the BWP indication field is valid.

[0357] If the network indicates to the terminal that the BWP indication field is invalid through the indication field value in the DCI, even if the BWP indication field exists in DCI 0_3 / 1_3, the terminal continues to maintain the active BWP of each carrier to send and receive data / indications regardless of the value indicated by the BWP indication field.

[0358] If the network indicates to the terminal that the BWP indication field is valid through the value of the indication field in the DCI, the terminal determines the target BWP index based on the BWP indication field in DCI 0_3 / 1_3. The terminal determines whether to perform BWP switching based on whether the active BWP index of the cell is the same as the target BWP index.

[0359] Example 8 (Solution for BWP Switching Capability Based on Multi-Carrier Scheduling DCI)

[0360] Method 6-1: When the terminal has the BWP switching capability based on multi-carrier scheduling DCI, the terminal performs BWP switching on one or more carriers according to the indication in the BWP indication field; when the terminal does not have the BWP switching capability of multi-carrier DCI, the terminal ignores the indication in the BWP indication field.

[0361] Method 6-2: The BWP switching capability of the multi-carrier scheduling DCI includes two reported values. One value indicates that the terminal performs BWP switching on one or more carriers according to the indication in the BWP indication field; the other data indicates that when the terminal does not have the BWP switching capability of the multi-carrier DCI, the terminal ignores the indication in the BWP indication field.

[0362] Among them, the BWP switching capability of the multi-carrier scheduled DCI in Method 6-1 and Method 6-2 can be used for DCI 0_3 and / or DCI 1_3, and acts on all cells in the cell group scheduled by DCI 0_3 / 1_3, or acts on all cells with DCI-based switching capability in the cell group scheduled by DCI 0_3 / 1_3.

[0363] Method 6-3: The BWP switching capability of the multi-carrier scheduled DCI is indicated using a bitmap, where the number of bits in the bitmap is equal to the maximum number of scheduled cells in the multi-carrier scheduled DCI supporting cell group. For each bit position, one state indicates that the corresponding cell supports the BWP switching capability of the multi-carrier DCI, and the terminal performs BWP switching for this cell according to the indication in the BWP indication field; the other state indicates that the corresponding cell does not support the BWP switching capability of the multi-carrier DCI, and the terminal ignores the indication in the BWP indication field.

[0364] The above-mentioned capabilities may be used in combination with any of the methods in Examples 1 to 7.

[0365] In single-carrier scheduling, the terminal determines whether to perform a BWP handover by simply comparing the target BWP indicated by the BWP field with the currently active BWP. In multi-carrier scheduling, however, DCI is used to schedule a cell group, and valid / invalid FDRA is used to indicate whether a cell within the group is scheduled. It is generally assumed that only scheduled and / or indicated cells will perform a BWP handover. Current technologies lack a method for determining the BWP handover cell using DCI in multi-carrier scheduling.

[0366] Therefore, the method for determining partial bandwidth switching proposed in the present disclosure can solve the problem of unclear judgment of whether FDRA is valid / invalid in the scenario of multi-carrier scheduling indicating BWP switching, avoid the situation where the base station and the terminal have inconsistent understanding of valid FDRA / invalid FDRA, and realize that in the multi-carrier scheduling scenario, it can effectively determine whether the cell performs BWP switching.

[0367] It should be noted that the implementation process of the method for determining partial bandwidth switching with the terminal device as the execution subject provided by the present disclosure can refer to the embodiments shown in Figures 1 and 2, and the implementation process will not be repeated here.

[0368] Referring to FIG. 3 , FIG. 3 is a flow chart of a method for determining partial bandwidth switching provided by another embodiment of the present disclosure, which is applied to a base station. The method includes:

[0369] Step 301: Determine downlink control information DCI for multi-carrier scheduling;

[0370] Step 302: Send the DCI to the terminal device; wherein the DCI is used by the terminal device to determine the target BWP ID according to the partial bandwidth BWP indication field in the DCI, and for each cell corresponding to the valid FDRA field in the DCI, when the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA field, determine that the cell corresponding to the valid FDRA field performs BWP switching.

[0371] In the disclosed embodiment, the base station first determines the DCI and then sends the DCI to the terminal. The terminal device determines the target BWP (here, the BWP after switching) ID based on the received or acquired DCI, and then determines whether the cell performs BWP switching by comparing the target BWP ID with the active BWP ID of the cell corresponding to the valid FDRA domain. That is, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, the cell performs BWP switching; if the target BWP ID is the same as the active BWP ID of the cell corresponding to the valid FDRA domain, the cell does not perform BWP switching. This ensures that in a multi-carrier scheduling scenario, it is possible to effectively determine whether a cell performs BWP switching.

[0372] In some embodiments, the DCI includes indication information of a cell used for signaling indication; wherein the cell used for signaling indication is any one of the following:

[0373] Indicates the cell where the enhanced Type-3 codebook is triggered by the terminal device;

[0374] The cell indicated by the HARQ-ACK codebook retransmission;

[0375] Sleeping quarters.

[0376] In some embodiments, the method further comprises:

[0377] Whether the BWP indication field in the DCI is valid is configured by high-layer signaling; or

[0378] Whether the BWP indication field in the DCI is valid is dynamically indicated in the DCI, where the dynamic indication includes configuring a new DCI field in the DCI for indication or reusing an existing indication field in the DCI for indication.

[0379] In the embodiments of the present disclosure, whether the BWP indication field in the DCI is valid (i.e., whether the BWP indication field in the DCI is valid / invalid) can be notified to the terminal through high-layer signaling configuration, or the validity / invalidity of the BWP indication field can be dynamically indicated in the DCI. Multiple methods are implemented to determine or indicate whether the BWP indication field in the DCI is valid.

[0380] It should be noted that the method for determining partial bandwidth switching provided by the present disclosure with the base station as the execution subject can be implemented with reference to the embodiments shown in Figures 2 and 3, and the implementation process will not be repeated here.

[0381] Figure 4 is a structural schematic diagram 1 of the device for determining partial bandwidth switching provided in an embodiment of the present disclosure. As shown in Figure 4, the device for determining partial bandwidth switching provided in this embodiment is applied to a terminal device. The device for determining partial bandwidth switching provided in this embodiment includes: a transceiver 400, which is used to receive and send data under the control of a processor 410.

[0382] In FIG4 , the bus architecture may include any number of interconnected buses and bridges, linking together various circuits of one or more processors represented by processor 410 and memory represented by memory 420. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 400 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, such as a wireless channel, a wired channel, an optical cable, and the like. For different user devices, the user interface 430 may also be an interface capable of connecting external or internal devices as required, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0383] The processor 410 is responsible for managing the bus architecture and general processing, and the memory 420 can store data used by the processor 410 when performing operations.

[0384] In some embodiments, the processor 410 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor may also adopt a multi-core architecture.

[0385] The processor 410 is configured to execute any of the methods provided by the embodiments of the present disclosure according to the obtained executable instructions by calling the program stored in the memory 420. The processor 410 and the memory 420 may also be physically separated.

[0386] In this embodiment, the memory 420 is used to store computer programs; the transceiver 400 is used to send and receive data under the control of the processor; and the processor 410 is used to read the computer program in the memory and perform the following operations:

[0387] Determining downlink control information DCI for multi-carrier scheduling;

[0388] Determine a target BWP ID according to the partial bandwidth BWP indication field in the DCI;

[0389] For each cell corresponding to a valid FDRA domain in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, it is determined that the cell corresponding to the valid FDRA domain performs BWP switching.

[0390] In the disclosed embodiment, the terminal device determines the target BWP (here, the BWP after switching) ID based on the received or acquired DCI, and then determines whether the cell performs BWP switching by comparing the target BWP ID with the active BWP ID of the cell corresponding to the valid FDRA domain. That is, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, the cell performs BWP switching; if the target BWP ID is the same as the active BWP ID of the cell corresponding to the valid FDRA domain, the cell does not perform BWP switching. This ensures that in a multi-carrier scheduling scenario, it is possible to effectively determine whether a cell performs BWP switching.

[0391] In some embodiments, the processor 410 is further configured to perform the following operations:

[0392] If the DCI does not include a scheduled carrier indication field, for each cell in the DCI, determine whether the FDRA field of the cell is valid by performing any one of the following operations:

[0393] determining, according to the FDRA domain information of the cell and the FDRA domain type corresponding to the active BWP of the cell, whether the FDRA domain of the cell in the DCI is valid;

[0394] Determining whether the FDRA field of the cell in the DCI is valid according to the FDRA field information of the cell and the FDRA field type configured by the target BWP;

[0395] Determine whether the FDRA field of the cell in the DCI is valid according to the pre-processed FDRA field information of each cell and the FDRA field type configured by the target BWP.

[0396] In some embodiments, the processor 410 is further configured to perform the following operations:

[0397] If the DCI includes a scheduled carrier indication field, determining, according to the scheduling carrier indication field, that the cell corresponding to the scheduling carrier indication field is a cell of the first BWP to be switched;

[0398] Determine whether the cell to which the BWP is to be switched performs BWP switching by performing any of the following operations:

[0399] If the target BWP ID is different from the active BWP ID of the cell of the first BWP to be switched, determining to perform BWP switching on the cell of the first BWP to be switched;

[0400] Determining whether the FDRA domain of the cell to which the first BWP is to be switched is valid according to the FDRA domain information of the cell to which the first BWP is to be switched and the FDRA domain type corresponding to the active BWP of the cell to which the first BWP is to be switched, and if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determining to perform BWP switching on the cell corresponding to the valid FDRA domain;

[0401] Determine, based on the FDRA domain information of the cell of the first BWP to be switched and the FDRA domain type configured by the target BWP, whether the FDRA domain of the cell of the first BWP to be switched is valid; if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determine to perform BWP switching on the cell corresponding to the valid FDRA domain;

[0402] According to the pre-processed FDRA domain information of the cell of the first BWP to be switched and the FDRA domain type configured by the target BWP, determine whether the FDRA domain of the cell of the first BWP to be switched is valid; if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determine that the cell corresponding to the valid FDRA domain performs BWP switching.

[0403] In the embodiment of the present disclosure, depending on whether the DCI includes a scheduled carrier indication field, it is possible to determine whether each cell in the DCI performs BWP switching in different ways or based on different scenarios, thereby being able to effectively and accurately determine whether the cell performs BWP switching in multiple scenarios or situations.

[0404] In some embodiments, the processor 410 is further configured to perform the following operations:

[0405] For each cell corresponding to the invalid FDRA field in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the invalid FDRA field, and it is determined that the cell corresponding to the invalid FDRA field is the cell indicated by the DCI for signaling indication, then determining that the cell corresponding to the invalid FDRA field is the cell of the second BWP to be switched;

[0406] Determine a cell with the smallest cell number from the cells of the second BWP to be switched, and determine that the cell with the smallest cell number performs BWP switching;

[0407] The cell indicated by the signaling is any one of the following:

[0408] Indicates the cell where the enhanced Type-3 codebook is triggered by the terminal device;

[0409] The cell indicated by the HARQ-ACK codebook retransmission;

[0410] Dormant community.

[0411] In the disclosed embodiment, for each cell corresponding to an invalid FDRA field in the DCI, cells for signaling indication, where the active BWP ID of the cell used for signaling indication is different from the target BWP ID, are obtained from the cells corresponding to all invalid FDRA fields in the DCI. The cell with the smallest cell number is determined from the obtained cells, and the cell with the smallest cell number performs BWP switching. This implements effective judgment on whether BWP switching is performed for the cell corresponding to the invalid FDRA field.

[0412] In some embodiments, the processor 410 is configured to, when pre-processing the FDRA field information of each cell in the DCI, include:

[0413] For each cell in the DCI, when the FDRA field length corresponding to the target BWP is greater than the FDRA field length corresponding to the active BWP, if the first condition is met, 1 is added to the FDRA field until the length of the FDRA field is the same as that of the target BWP, and the pre-processed FDRA field information is obtained; if the first condition is not met, 0 is added to the FDRA field until the length of the FDRA field is the same as that of the target BWP, and the pre-processed FDRA field information is obtained; wherein, the first condition is that the FDRA field type configured for the target BWP is Type 1 or Type 2 and the subcarrier spacing is 15 kHz, and the FDRA field information in the DCI is all 1;

[0414] If the FDRA domain length corresponding to the target BWP is smaller than the FDRA domain length corresponding to the active BWP, read the information of the lowest corresponding bits in the FDRA domain information in the DCI that is the same as the FDRA domain length corresponding to the target BWP, and use the read information as the preprocessed FDRA domain information.

[0415] In an embodiment of the present disclosure, if the FDRA domain length corresponding to the target BWP is different from the FDRA domain length corresponding to the active BWP of the cell in the DCI, in order to ensure that the FDRA domain of the cell in the DCI can be effectively and accurately judged to be valid, the FDRA domain length corresponding to the target BWP can be compared with the FDRA domain length corresponding to the active BWP of the cell in the DCI. If the FDRA domain length corresponding to the target BWP is greater than the FDRA domain length corresponding to the active BWP, it is determined whether the first condition is met. If the first condition is met, 1 is added to the FDRA domain of the cell until it is the same as the FDRA domain length corresponding to the target BWP. Otherwise, 0 is added to the FDRA domain of the cell until it is the same as the FDRA domain length corresponding to the target BWP to obtain the pre-processed FDRA domain information; if the FDRA domain length corresponding to the target BWP is less than the FDRA domain length corresponding to the active BWP, the terminal device reads the lowest few bits of information in the FDRA domain of the cell that are the same as the FDRA domain length corresponding to the target BWP as the pre-processed FDRA domain information.

[0416] In some embodiments, the processor 410 is further configured to perform the following operations:

[0417] Determine whether the BWP indication field in the DCI is valid through high-layer signaling configuration; or

[0418] Whether the BWP indication field in the DCI is valid is determined through dynamic indication information in the DCI, where the dynamic indication information is indicated by configuring a new DCI field in the DCI or by reusing an existing indication field in the DCI.

[0419] In the embodiments of the present disclosure, whether the BWP indication field in the DCI is valid (i.e., whether the BWP indication field in the DCI is valid / invalid) can be notified to the terminal through high-layer signaling configuration, or the validity / invalidity of the BWP indication field can be dynamically indicated in the DCI. Multiple methods are implemented to determine or indicate whether the BWP indication field in the DCI is valid.

[0420] In some embodiments, the terminal device supports the BWP switching capability of the DCI, or the terminal device does not support the BWP switching capability of the DCI.

[0421] In some embodiments, the information used to determine the BWP switching capability of the DCI includes first reporting information and second reporting information;

[0422] Among them, the first reporting information is used to indicate that the terminal device supports the BWP switching capability of the DCI; the second reporting information is used to indicate that the terminal does not support the BWP switching capability of the DCI.

[0423] In some embodiments, the BWP switching capability of the DCI is indicated by a bitmap;

[0424] The number of bits in the bitmap is the same as the maximum value of the scheduled cells in the DCI supported cell group;

[0425] For each bit position, the bit position includes a first state or a second state, the first state is used to indicate that the cell corresponding to the bit position supports the BWP switching capability of the DCI; the second state is used to indicate that the cell corresponding to the bit position does not support the BWP switching capability of the DCI.

[0426] In an embodiment of the present disclosure, a terminal device may have a BWP switching capability based on a multi-carrier scheduling DCI, or may not have a BWP switching capability based on a multi-carrier scheduling DCI; whether the terminal device has a BWP switching capability based on a multi-carrier scheduling DCI may be reported to the base station through two types of information (first reporting information and second reporting information), and may be indicated through a bitmap. When the terminal device has a BWP switching capability based on a multi-carrier scheduling DCI, the terminal device may perform BWP switching on one or more carriers according to the indication in the BWP indication field in the DCI; when the terminal device does not have a BWP switching capability based on a multi-carrier scheduling DCI, the terminal ignores the indication in the BWP indication field.

[0427] In some embodiments, each cell indicated by the DCI includes at least an activated cell indicated by the DCI.

[0428] In some embodiments, each cell indicated by the DCI includes a deactivated cell and a sleeping cell indicated by the DCI.

[0429] It should be noted that the device for determining partial bandwidth switching provided by the present disclosure can implement all the method steps implemented by the method embodiment described in the first aspect above, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be repeated here.

[0430] FIG5 is a second structural diagram of a device for determining partial bandwidth switching provided in an embodiment of the present disclosure. The device for determining partial bandwidth switching provided in this embodiment is applied to a terminal device. The device 500 for determining partial bandwidth switching provided in this embodiment includes:

[0431] A first processing unit 501 is configured to determine downlink control information DCI for multi-carrier scheduling;

[0432] The second processing unit 502 is configured to determine a target BWP ID according to the partial bandwidth BWP indication field in the DCI;

[0433] For each cell corresponding to a valid FDRA domain in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, it is determined that the cell corresponding to the valid FDRA domain performs BWP switching.

[0434] In the disclosed embodiment, the terminal device determines the target BWP (here, the BWP after switching) ID based on the received or acquired DCI, and then determines whether the cell performs BWP switching by comparing the target BWP ID with the active BWP ID of the cell corresponding to the valid FDRA domain. That is, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, the cell performs BWP switching; if the target BWP ID is the same as the active BWP ID of the cell corresponding to the valid FDRA domain, the cell does not perform BWP switching. This ensures that in a multi-carrier scheduling scenario, it is possible to effectively determine whether a cell performs BWP switching.

[0435] In some embodiments, the apparatus further includes: a third processing unit; the third processing unit is configured to:

[0436] When the DCI does not include a scheduled carrier indication field, for each cell in the DCI, determining whether the FDRA field of the cell is valid is performed by performing any one of the following operations:

[0437] determining, according to the FDRA domain information of the cell and the FDRA domain type corresponding to the active BWP of the cell, whether the FDRA domain of the cell in the DCI is valid;

[0438] Determining whether the FDRA field of the cell in the DCI is valid according to the FDRA field information of the cell and the FDRA field type configured by the target BWP;

[0439] Determine whether the FDRA field of the cell in the DCI is valid according to the pre-processed FDRA field information of each cell and the FDRA field type configured by the target BWP.

[0440] In some embodiments, the apparatus further includes: a fourth processing unit, the fourth processing unit being configured to:

[0441] When the DCI includes a scheduled carrier indication field, determining, according to the scheduling carrier indication field, that a cell corresponding to the scheduling carrier indication field is a cell of a first BWP to be switched;

[0442] Determine whether the cell to which the BWP is to be switched performs BWP switching by performing any of the following operations:

[0443] If the target BWP ID is different from the active BWP ID of the cell of the first BWP to be switched, determining to perform BWP switching on the cell of the first BWP to be switched;

[0444] Determining whether the FDRA domain of the cell to which the first BWP is to be switched is valid according to the FDRA domain information of the cell to which the first BWP is to be switched and the FDRA domain type corresponding to the active BWP of the cell to which the first BWP is to be switched, and if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determining to perform BWP switching on the cell corresponding to the valid FDRA domain;

[0445] Determine, based on the FDRA domain information of the cell of the first BWP to be switched and the FDRA domain type configured by the target BWP, whether the FDRA domain of the cell of the first BWP to be switched is valid; if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determine to perform BWP switching on the cell corresponding to the valid FDRA domain;

[0446] According to the pre-processed FDRA domain information of the cell of the first BWP to be switched and the FDRA domain type configured by the target BWP, determine whether the FDRA domain of the cell of the first BWP to be switched is valid; if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determine that the cell corresponding to the valid FDRA domain performs BWP switching.

[0447] In the embodiment of the present disclosure, depending on whether the DCI includes a scheduled carrier indication field, it is possible to determine whether each cell in the DCI performs BWP switching in different ways or based on different scenarios, thereby being able to effectively and accurately determine whether the cell performs BWP switching in multiple scenarios or situations.

[0448] In some embodiments, the apparatus further comprises: a fifth processing unit; the fifth processing unit is configured to:

[0449] For each cell corresponding to the invalid FDRA field in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the invalid FDRA field, and it is determined that the cell corresponding to the invalid FDRA field is the cell indicated by the DCI for signaling indication, then determining that the cell corresponding to the invalid FDRA field is the cell of the second BWP to be switched;

[0450] Determine a cell with the smallest cell number from the cells of the second BWP to be switched, and determine that the cell with the smallest cell number performs BWP switching;

[0451] The cell indicated by the signaling is any one of the following:

[0452] Indicates the cell where the enhanced Type-3 codebook is triggered by the terminal device;

[0453] The cell indicated by the HARQ-ACK codebook retransmission;

[0454] Dormant community.

[0455] In the disclosed embodiment, for each cell corresponding to an invalid FDRA field in the DCI, cells for signaling indication, where the active BWP ID of the cell used for signaling indication is different from the target BWP ID, are obtained from the cells corresponding to all invalid FDRA fields in the DCI. The cell with the smallest cell number is determined from the obtained cells, and the cell with the smallest cell number performs BWP switching. This implements effective judgment on whether BWP switching is performed for the cell corresponding to the invalid FDRA field.

[0456] In some embodiments, the apparatus further includes: a sixth processing unit; the sixth processing unit is configured to pre-process the FDRA domain information of each cell in the DCI; the sixth processing unit is configured to:

[0457] For each cell in the DCI, when the FDRA field length corresponding to the target BWP is greater than the FDRA field length corresponding to the active BWP, if the first condition is met, 1 is added to the FDRA field until the length of the FDRA field is the same as that of the target BWP, and the pre-processed FDRA field information is obtained; if the first condition is not met, 0 is added to the FDRA field until the length of the FDRA field is the same as that of the target BWP, and the pre-processed FDRA field information is obtained; wherein, the first condition is that the FDRA field type configured for the target BWP is Type 1 or Type 2 and the subcarrier spacing is 15 kHz, and the FDRA field information in the DCI is all 1;

[0458] When the FDRA domain length corresponding to the target BWP is smaller than the FDRA domain length corresponding to the active BWP, the information of the lowest corresponding bits that is the same as the FDRA domain length corresponding to the target BWP in the FDRA domain information in the DCI is read, and the read information is used as the preprocessed FDRA domain information.

[0459] In an embodiment of the present disclosure, if the FDRA domain length corresponding to the target BWP is different from the FDRA domain length corresponding to the active BWP of the cell in the DCI, in order to ensure that the FDRA domain of the cell in the DCI can be effectively and accurately judged to be valid, the FDRA domain length corresponding to the target BWP can be compared with the FDRA domain length corresponding to the active BWP of the cell in the DCI. If the FDRA domain length corresponding to the target BWP is greater than the FDRA domain length corresponding to the active BWP, it is determined whether the first condition is met. If the first condition is met, 1 is added to the FDRA domain of the cell until it is the same as the FDRA domain length corresponding to the target BWP. Otherwise, 0 is added to the FDRA domain of the cell until it is the same as the FDRA domain length corresponding to the target BWP to obtain the pre-processed FDRA domain information; if the FDRA domain length corresponding to the target BWP is less than the FDRA domain length corresponding to the active BWP, the terminal device reads the lowest few bits of information in the FDRA domain of the cell that are the same as the FDRA domain length corresponding to the target BWP as the pre-processed FDRA domain information.

[0460] In some embodiments, the apparatus further includes: a seventh processing unit; the seventh processing unit is configured to:

[0461] Determine whether the BWP indication field in the DCI is valid through high-layer signaling configuration; or

[0462] Whether the BWP indication field in the DCI is valid is determined through dynamic indication information in the DCI, where the dynamic indication information is indicated by configuring a new DCI field in the DCI or by reusing an existing indication field in the DCI.

[0463] In the embodiments of the present disclosure, whether the BWP indication field in the DCI is valid (i.e., whether the BWP indication field in the DCI is valid / invalid) can be notified to the terminal through high-layer signaling configuration, or the validity / invalidity of the BWP indication field can be dynamically indicated in the DCI. Multiple methods are implemented to determine or indicate whether the BWP indication field in the DCI is valid.

[0464] In some embodiments, the terminal device supports the BWP switching capability of the DCI, or the terminal device does not support the BWP switching capability of the DCI.

[0465] In some embodiments, the information used to determine the BWP switching capability of the DCI includes first reporting information and second reporting information;

[0466] Among them, the first reporting information is used to indicate that the terminal device supports the BWP switching capability of the DCI; the second reporting information is used to indicate that the terminal does not support the BWP switching capability of the DCI.

[0467] In some embodiments, the BWP switching capability of the DCI is indicated by a bitmap;

[0468] The number of bits in the bitmap is the same as the maximum value of the scheduled cells in the DCI supported cell group;

[0469] For each bit position, the bit position includes a first state or a second state, the first state is used to indicate that the cell corresponding to the bit position supports the BWP switching capability of the DCI; the second state is used to indicate that the cell corresponding to the bit position does not support the BWP switching capability of the DCI.

[0470] In an embodiment of the present disclosure, a terminal device may have a BWP switching capability based on a multi-carrier scheduling DCI, or may not have a BWP switching capability based on a multi-carrier scheduling DCI; whether the terminal device has a BWP switching capability based on a multi-carrier scheduling DCI may be reported to the base station through two types of information (first reporting information and second reporting information), and may be indicated through a bitmap. When the terminal device has a BWP switching capability based on a multi-carrier scheduling DCI, the terminal device may perform BWP switching on one or more carriers according to the indication in the BWP indication field in the DCI; when the terminal device does not have a BWP switching capability based on a multi-carrier scheduling DCI, the terminal ignores the indication in the BWP indication field.

[0471] In some embodiments, each cell indicated by the DCI includes at least an activated cell indicated by the DCI.

[0472] In some embodiments, each cell indicated by the DCI includes a deactivated cell and a sleeping cell indicated by the DCI.

[0473] It should be noted that the device for determining partial bandwidth switching provided by the present disclosure can implement all the method steps implemented by the method embodiment described in the first aspect above, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be repeated here.

[0474] FIG6 is a third structural diagram of the apparatus for determining partial bandwidth switching provided in an embodiment of the present disclosure. As shown in FIG6 , the apparatus for determining partial bandwidth switching provided in this embodiment is applied to a base station. The apparatus for determining partial bandwidth switching provided in this embodiment includes: a transceiver 600, configured to receive and send data under the control of a processor 610.

[0475] In FIG6 , the bus architecture may include any number of interconnected buses and bridges, linking together various circuits of one or more processors represented by processor 610 and memory represented by memory 620. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 600 may be a plurality of components, i.e., a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium, such as a wireless channel, a wired channel, an optical cable, or the like. The processor 610 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 610 when performing operations.

[0476] The processor 610 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor may also adopt a multi-core architecture.

[0477] In this embodiment, the memory 620 is used to store computer programs; the transceiver 600 is used to send and receive data under the control of the processor; and the processor 610 is used to read the computer program in the memory and perform the following operations:

[0478] Determining downlink control information DCI for multi-carrier scheduling;

[0479] The DCI is sent to the terminal device; wherein the DCI is used by the terminal device to determine the target BWP ID according to the partial bandwidth BWP indication field in the DCI, and for each cell corresponding to the valid FDRA field in the DCI, when the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA field, determine that the cell corresponding to the valid FDRA field performs BWP switching.

[0480] In the disclosed embodiment, the base station first determines the DCI and then sends the DCI to the terminal. The terminal device determines the target BWP (here, the BWP after switching) ID based on the received or acquired DCI, and then determines whether the cell performs BWP switching by comparing the target BWP ID with the active BWP ID of the cell corresponding to the valid FDRA domain. That is, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, the cell performs BWP switching; if the target BWP ID is the same as the active BWP ID of the cell corresponding to the valid FDRA domain, the cell does not perform BWP switching. This ensures that in a multi-carrier scheduling scenario, it is possible to effectively determine whether a cell performs BWP switching.

[0481] In some embodiments, the DCI includes indication information of a cell used for signaling indication; wherein the cell used for signaling indication is any one of the following:

[0482] Indicates the cell where the enhanced Type-3 codebook is triggered by the terminal device;

[0483] The cell indicated by the HARQ-ACK codebook retransmission;

[0484] Sleeping quarters.

[0485] In some embodiments, the processor 610 is further configured to perform the following operations:

[0486] Whether the BWP indication field in the DCI is valid is configured by high-layer signaling; or

[0487] Whether the BWP indication field in the DCI is valid is dynamically indicated in the DCI, where the dynamic indication includes configuring a new DCI field in the DCI for indication or reusing an existing indication field in the DCI for indication.

[0488] In the embodiments of the present disclosure, whether the BWP indication field in the DCI is valid (i.e., whether the BWP indication field in the DCI is valid / invalid) can be notified to the terminal through high-layer signaling configuration, or the validity / invalidity of the BWP indication field can be dynamically indicated in the DCI. Multiple methods are implemented to determine or indicate whether the BWP indication field in the DCI is valid.

[0489] It should be noted here that the device for determining partial bandwidth switching provided by the present disclosure can implement all the method steps implemented by the method embodiment described in the second aspect above, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be repeated here.

[0490] FIG7 is a fourth structural diagram of a device for determining partial bandwidth switching provided in an embodiment of the present disclosure. As shown in FIG7 , the device for determining partial bandwidth switching provided in this embodiment is applied to a base station. The device 700 for determining partial bandwidth switching provided in this embodiment includes:

[0491] The determining unit 701 is configured to determine downlink control information DCII for multi-carrier scheduling;

[0492] A sending unit 702 is configured to send the DCI to a terminal device; wherein the DCI is used by the terminal device to determine a target BWP ID based on a partial bandwidth BWP indication field in the DCI, and for each cell corresponding to a valid FDRA field in the DCI, when the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA field, determine that the cell corresponding to the valid FDRA field performs BWP switching.

[0493] In the disclosed embodiment, the base station first determines the DCI and then sends the DCI to the terminal. The terminal device determines the target BWP (here, the BWP after switching) ID based on the received or acquired DCI, and then determines whether the cell performs BWP switching by comparing the target BWP ID with the active BWP ID of the cell corresponding to the valid FDRA domain. That is, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, the cell performs BWP switching; if the target BWP ID is the same as the active BWP ID of the cell corresponding to the valid FDRA domain, the cell does not perform BWP switching. This ensures that in a multi-carrier scheduling scenario, it is possible to effectively determine whether a cell performs BWP switching.

[0494] In some embodiments, the DCI includes indication information of a cell used for signaling indication; wherein the cell used for signaling indication is any one of the following:

[0495] Indicates the cell where the enhanced Type-3 codebook is triggered by the terminal device;

[0496] The cell indicated by the HARQ-ACK codebook retransmission;

[0497] Sleeping quarters.

[0498] In some embodiments, the apparatus further comprises: a processing unit; the processing unit is configured to:

[0499] Whether the BWP indication field in the DCI is valid is configured by high-layer signaling; or

[0500] Whether the BWP indication field in the DCI is valid is dynamically indicated in the DCI, where the dynamic indication includes configuring a new DCI field in the DCI for indication or reusing an existing indication field in the DCI for indication.

[0501] In the embodiments of the present disclosure, whether the BWP indication field in the DCI is valid (i.e., whether the BWP indication field in the DCI is valid / invalid) can be notified to the terminal through high-layer signaling configuration, or the validity / invalidity of the BWP indication field can be dynamically indicated in the DCI. Multiple methods are implemented to determine or indicate whether the BWP indication field in the DCI is valid.

[0502] It should be noted here that the device for determining partial bandwidth switching provided by the present disclosure can implement all the method steps implemented by the method embodiment described in the second aspect above, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be repeated here.

[0503] It should be noted that the division of units in the embodiments of the present disclosure is schematic and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of the present disclosure may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0504] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present disclosure, or the part that contributes to the relevant technology, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present disclosure.

[0505] The embodiments of the present disclosure further provide a non-transitory readable storage medium storing a computer program configured to cause a processor to execute any of the above method embodiments.

[0506] Among them, the non-transitory readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO)), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drives (SSDs)), etc.

[0507] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0508] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0509] These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0510] Obviously, those skilled in the art may make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include these modifications and variations.

Claims

1. A method for determining partial bandwidth switching, wherein: Applied to a terminal device, the method includes: Determining downlink control information DCI for multi-carrier scheduling; Determine a target BWP ID according to the partial bandwidth BWP indication field in the DCI; For each cell corresponding to a valid FDRA domain in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, it is determined that the cell corresponding to the valid FDRA domain performs BWP switching.

2. The method according to claim 1, wherein If the DCI does not include a scheduled carrier indication field, the method further includes: For each cell in the DCI, determine whether the FDRA field of the cell is valid by performing any one of the following operations: determining, according to the FDRA domain information of the cell and the FDRA domain type corresponding to the active BWP of the cell, whether the FDRA domain of the cell in the DCI is valid; Determining whether the FDRA field of the cell in the DCI is valid according to the FDRA field information of the cell and the FDRA field type configured by the target BWP; Determine whether the FDRA field of the cell in the DCI is valid according to the pre-processed FDRA field information of each cell and the FDRA field type configured by the target BWP.

3. The method according to claim 1, wherein If the DCI includes a scheduled carrier indication field, the method further includes: According to the scheduling carrier indication field, determining that the cell corresponding to the scheduling carrier indication field is a cell of the first BWP to be switched; Determine whether the cell to which the BWP is to be switched performs BWP switching by performing any of the following operations: If the target BWP ID is different from the active BWP ID of the cell of the first BWP to be switched, determining to perform BWP switching on the cell of the first BWP to be switched; Determining whether the FDRA domain of the cell to which the first BWP is to be switched is valid according to the FDRA domain information of the cell to which the first BWP is to be switched and the FDRA domain type corresponding to the active BWP of the cell to which the first BWP is to be switched, and if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determining to perform BWP switching on the cell corresponding to the valid FDRA domain; Determine, based on the FDRA domain information of the cell of the first BWP to be switched and the FDRA domain type configured by the target BWP, whether the FDRA domain of the cell of the first BWP to be switched is valid; if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determine to perform BWP switching on the cell corresponding to the valid FDRA domain; According to the pre-processed FDRA domain information of the cell of the first BWP to be switched and the FDRA domain type configured by the target BWP, determine whether the FDRA domain of the cell of the first BWP to be switched is valid; if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, determine that the cell corresponding to the valid FDRA domain performs BWP switching.

4. The method according to claim 1, wherein The method further comprises: For each cell corresponding to the invalid FDRA field in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the invalid FDRA field, and it is determined that the cell corresponding to the invalid FDRA field is the cell indicated by the DCI for signaling indication, then determining that the cell corresponding to the invalid FDRA field is the cell of the second BWP to be switched; Determine a cell with the smallest cell number from the cells of the second BWP to be switched, and determine that the cell with the smallest cell number performs BWP switching; The cell indicated by the signaling is any one of the following: Indicates the cell where the enhanced Type-3 codebook is triggered by the terminal device; The cell indicated by the HARQ-ACK codebook retransmission; Dormant community.

5. The method according to claim 2 or 3, wherein: Preprocessing the FDRA domain information of each cell in the DCI includes: For each cell in the DCI, when the FDRA field length corresponding to the target BWP is greater than the FDRA field length corresponding to the active BWP, if the first condition is met, 1 is added to the FDRA field until the length of the FDRA field is the same as that of the target BWP, and the pre-processed FDRA field information is obtained; if the first condition is not met, 0 is added to the FDRA field until the length of the FDRA field is the same as that of the target BWP, and the pre-processed FDRA field information is obtained; wherein, the first condition is that the FDRA field type configured for the target BWP is Type 1 or Type 2 and the subcarrier spacing is 15 kHz, and the FDRA field information in the DCI is all 1; If the FDRA domain length corresponding to the target BWP is smaller than the FDRA domain length corresponding to the active BWP, read the information of the lowest corresponding bits in the FDRA domain information in the DCI that is the same as the FDRA domain length corresponding to the target BWP, and use the read information as the preprocessed FDRA domain information.

6. The method according to claim 1, wherein The method further comprises: Determine whether the BWP indication field in the DCI is valid through high-layer signaling configuration; or Whether the BWP indication field in the DCI is valid is determined through dynamic indication information in the DCI, where the dynamic indication information is indicated by configuring a new DCI field in the DCI or by reusing an existing indication field in the DCI.

7. The method according to any one of claims 1 to 3, wherein: The terminal device supports the BWP switching capability of the DCI, or the terminal device does not support the BWP switching capability of the DCI.

8. The method according to claim 7, wherein: The information used to determine the BWP switching capability of the DCI includes first reporting information and second reporting information; Among them, the first reporting information is used to indicate that the terminal device supports the BWP switching capability of the DCI; the second reporting information is used to indicate that the terminal does not support the BWP switching capability of the DCI.

9. The method according to claim 7, wherein: The BWP switching capability of the DCI is indicated by a bitmap; The number of bits in the bitmap is the same as the maximum value of the scheduled cells in the DCI supported cell group; For each bit position, the bit position includes a first state or a second state, the first state is used to indicate that the cell corresponding to the bit position supports the BWP switching capability of the DCI; the second state is used to indicate that the cell corresponding to the bit position does not support the BWP switching capability of the DCI.

10. The method according to any one of claims 1 to 3, wherein: Each cell indicated by the DCI includes at least the activated cell indicated by the DCI.

11. The method according to claim 10, wherein: Each cell indicated by the DCI includes a deactivated cell and a sleeping cell indicated by the DCI.

12. A method for determining partial bandwidth switching, wherein: Applied to a base station, the method includes: Determining downlink control information DCI for multi-carrier scheduling; The DCI is sent to the terminal device; wherein the DCI is used by the terminal device to determine the target BWP ID according to the partial bandwidth BWP indication field in the DCI, and for each cell corresponding to the valid FDRA field in the DCI, when the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA field, determine that the cell corresponding to the valid FDRA field performs BWP switching.

13. The method according to claim 12, wherein: The DCI includes indication information of a cell used for signaling indication; wherein the cell used for signaling indication is any one of the following: Indicates the cell where the enhanced Type-3 codebook is triggered by the terminal device; The cell indicated by the HARQ-ACK codebook retransmission; Sleeping community.

14. The method according to claim 12, wherein: The method further comprises: Whether the BWP indication field in the DCI is valid is configured by high-layer signaling; or Whether the BWP indication field in the DCI is valid is dynamically indicated in the DCI, where the dynamic indication includes configuring a new DCI field in the DCI for indication or reusing an existing indication field in the DCI for indication.

15. A device for determining partial bandwidth switching, wherein: The device is applied to a terminal device, and includes: A first processing unit, configured to determine downlink control information DCI for multi-carrier scheduling; A second processing unit is configured to determine a target BWP ID according to a partial bandwidth BWP indication field in the DCI; For each cell corresponding to a valid FDRA domain in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, it is determined that the cell corresponding to the valid FDRA domain performs BWP switching.

16. A device for determining partial bandwidth switching, wherein: Applied to a base station, the device includes: a determining unit, configured to determine downlink control information DCI for multi-carrier scheduling; A sending unit is used to send the DCI to the terminal device; wherein the DCI is used by the terminal device to determine the target BWP ID according to the partial bandwidth BWP indication field in the DCI, and for each cell corresponding to the valid FDRA field in the DCI, when the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA field, determine that the cell corresponding to the valid FDRA field performs BWP switching.

17. A device for determining partial bandwidth switching, wherein: Applied to terminal equipment, the device includes a memory, a transceiver, and a processor: Memory for storing computer programs; a transceiver, configured to transmit and receive data under the control of the processor; and a processor, configured to read the computer program in the memory and perform the following operations: Determining downlink control information DCI for multi-carrier scheduling; Determine a target BWP ID according to the partial bandwidth BWP indication field in the DCI; For each cell corresponding to a valid FDRA domain in the DCI, if the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA domain, it is determined that the cell corresponding to the valid FDRA domain performs BWP switching.

18. A device for determining partial bandwidth switching, wherein: Applied to a base station, the device includes: a memory, a transceiver, and a processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: Determining downlink control information DCI for multi-carrier scheduling; The DCI is sent to the terminal device; wherein the DCI is used by the terminal device to determine the target BWP ID according to the partial bandwidth BWP indication field in the DCI, and for each cell corresponding to the valid FDRA field in the DCI, when the target BWP ID is different from the active BWP ID of the cell corresponding to the valid FDRA field, determine that the cell corresponding to the valid FDRA field performs BWP switching.

19. A non-transitory readable storage medium, wherein: The non-transitory readable storage medium stores a computer program, and the computer program is used to enable a processor to execute the method according to any one of claims 1 to 14.

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