Method and related device for determining frequency domain position of control resource set

Abstract

Embodiments of this application disclose a method and related devices for determining the frequency-domain position of a control resource set. The method includes: before the terminal device successfully initializes access, the terminal device receives configuration information of a first control resource set; before the terminal device successfully initializes access or after the terminal device successfully initializes access, the terminal device listens for downlink physical control channels to obtain uplink and downlink scheduling control information according to a first common resource block set occupied by the first control resource set, where a first starting common resource block included in the first common resource block set is determined according to a second starting common resource block of a first downlink bandwidth part and the configuration information of the first control resource set, and the configuration information is used to indicate the position of physical resource blocks occupied by the first control resource set within the first downlink bandwidth part. By using this application, the complexity of determining the frequency-domain position of the first control resource set can be reduced.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a method and related device for determining the frequency-domain position of a control resource set. Background Art

[0002] A common control resource set (commonControlResourceSet) can carry scheduling information for random access responses, paging, and system messages. For a terminal device, it can listen for scheduling information of random access responses, paging, and system messages on the common control resource set. For a network device, it can send scheduling information of random access responses, paging, and system messages on the common control resource set. In existing solutions, more than one frequency-domain position of the common control resource set is determined, increasing the complexity of determining the frequency-domain position of the common control resource set. Summary of the Invention

[0003] Embodiments of this application provide a method and related device for determining the frequency-domain position of a control resource set, in order to reduce the complexity of determining the frequency-domain position of a first control resource set.

[0004] In a first aspect, embodiments of this application provide a possible method for determining the frequency-domain position of a control resource set, which is completed by a terminal device and a network device, and includes:

[0005] Before the terminal device successfully completes initial access, the network device sends configuration information of a first control resource set to the terminal device; correspondingly, before the terminal device successfully completes initial access, the terminal device receives the configuration information of the first control resource set;

[0006] Before the terminal device successfully completes initial access or after the terminal device successfully completes initial access, the network device broadcasts uplink and downlink scheduling control information on a downlink physical control channel according to a first common resource block set occupied by the first control resource set; correspondingly, before the terminal device successfully completes initial access, the network device broadcasts uplink and downlink scheduling control information on a downlink physical control channel according to the first common resource block set occupied by the first control resource set.

[0007] Wherein, a first starting common resource block included in the first common resource block set is determined according to a second starting common resource block of a first downlink bandwidth part and the configuration information of the first control resource set, and the configuration information is used to indicate the position of physical resource blocks occupied by the first control resource set within the first downlink bandwidth part;

[0008] In the first aspect, the frequency-domain position of the first control resource set before and after the initial access of the terminal device is successful is the same. In this way, the terminal device and the network device only need to calculate the frequency-domain position of the first control resource set once, reducing the complexity of determining the frequency-domain position of the first control resource set.

[0009] In combination with the first aspect, optionally, for the terminal device, the initial access success of the terminal device recognized by the terminal device is used to indicate one of the following moments:

[0010] The moment when the terminal device successfully receives the initial transmission of Message 4 and sends an acknowledgment message to the network device;

[0011] After the terminal device successfully receives the initial transmission of Message 4, the moment when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identifier C-RNTI;

[0012] The moment when the terminal device successfully receives the retransmission of Message 4 and sends an acknowledgment message to the network device;

[0013] After the terminal device successfully receives the retransmission of Message 4, the moment when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identifier C-RNTI;

[0014] The moment when the terminal device successfully receives the configuration information for indicating that the DCI scrambled by C-RNTI needs to be blindly detected after successfully receiving the initial transmission of Message 4;

[0015] The moment when the terminal device successfully receives the configuration information for indicating that the DCI scrambled by C-RNTI needs to be blindly detected after successfully receiving the retransmission of Message 4.

[0016] In combination with the first aspect, optionally, for the network device, the initial access success of the terminal device recognized by the network device is used to indicate one of the following moments:

[0017] The moment when the network device receives the acknowledgment message sent by the terminal device for the initial transmission Message 4 sent by the network device;

[0018] The moment when the network device receives the acknowledgment message sent by the terminal device for the retransmission Message 4 sent by the network device;

[0019] After the network device receives the acknowledgment message sent by the terminal device for the initial transmission Message 4 sent by the network device, the moment when the network device sends the configuration information for indicating that the DCI scrambled by C-RNTI needs to be blindly detected to the terminal device;

[0020] After the network device receives the acknowledgment message sent by the terminal device for the retransmission message 4 sent by the network device, the network device sends to the terminal device the time for indicating the configuration information of the DCI that needs to be blindly detected with the C-RNTI scrambling.

[0021] In combination with the first aspect, optionally, the first downlink bandwidth part is defined according to the control resource set coreset#0 or configured according to the system information block SIB 1.

[0022] In combination with the first aspect, optionally, the identifier of the first control resource set is not 0.

[0023] In combination with the first aspect, optionally, when the first downlink bandwidth part is defined according to coreset#0, the second starting common resource block of the first downlink bandwidth part is determined according to the second starting physical resource block of the first downlink bandwidth part and the first offset; wherein, the first offset is used to indicate the number of physical resource blocks by which the second starting physical resource block differs from the reference point, and the reference point is a common reference point of the resource block grid, and the reference point is used to indicate the center position of subcarrier 0 in the common resource block CRB 0 configured with a preset subcarrier spacing.

[0024] In combination with the first aspect, optionally, the first offset is determined according to the second offset between the second starting physical resource block of the first downlink bandwidth part and the third starting physical resource block of the SS / PBCH block and the common resource block offset of the SS / PBCH block; wherein, the second offset is used to indicate the number of physical resource blocks (PRBs) by which the second starting physical resource block differs from the third starting physical resource block of the SS / PBCH block; the common resource block offset of the SS / PBCH block is used to indicate the number of physical resource blocks by which the third starting physical resource block differs from the reference point.

[0025] In combination with the first aspect, optionally, when the first downlink bandwidth part is configured according to SIB 1, the second starting common resource block of the first downlink bandwidth part is determined according to the second starting physical resource block of the first downlink bandwidth part and the third offset; wherein, the third offset is used to indicate the number of physical resource blocks by which the second starting physical resource block differs from the reference point, and the reference point is a common reference point of the resource block grid, and the reference point is used to indicate the center position of subcarrier 0 in the common resource block CRB 0 configured with a preset subcarrier spacing.

[0026] In a second aspect, an embodiment of the present application provides another possible method for determining the frequency domain position of a control resource set, which is completed by a terminal device and a network device, and includes:

[0027] Before the terminal device successfully initializes access, the network device sends configuration information of a first control resource set to the terminal device; correspondingly, before the terminal device successfully initializes access, the terminal device receives the configuration information of the first control resource set;

[0028] Before the terminal device successfully initializes access, the network device does not broadcast uplink and downlink scheduling control information on the downlink physical control channel according to the set of common resource blocks occupied by the first control resource set; correspondingly, before the terminal device successfully initializes access, the terminal device does not listen to the downlink physical control channel according to the set of common resource blocks occupied by the first control resource set;

[0029] After the terminal device successfully initializes access, the network device broadcasts uplink and downlink scheduling control information on the downlink physical control channel according to the first set of common resource blocks occupied by the first control resource set; correspondingly, after the terminal device successfully initializes access, the terminal device listens to the downlink physical control channel according to the first set of common resource blocks occupied by the first control resource set to obtain uplink and downlink scheduling control information;

[0030] The first starting common resource block included in the first set of common resource blocks is determined according to the second starting common resource block of the first downlink bandwidth part and the configuration information of the first control resource set, and the configuration information is used to indicate the position of the physical resource blocks occupied by the first control resource set within the first downlink bandwidth part.

[0031] In a second aspect, before the terminal device successfully initializes access, neither the network device nor the terminal device needs to determine the frequency-domain position of the first control resource set. After the terminal device successfully initializes access, the frequency-domain position of the first control resource set is determined based on the referenced downlink bandwidth part. In this way, the terminal device and the network device only need to calculate the frequency-domain position of the first control resource set once, reducing the complexity of determining the frequency-domain position of the first control resource set.

[0032] In combination with the second aspect, optionally, for the terminal device, the successful initialization access of the terminal device recognized is used to indicate one of the following moments:

[0033] The moment when the terminal device successfully receives the initial transmission of Message 4 and sends an acknowledgment message to the network device;

[0034] After the terminal device successfully receives the initial transmission of Message 4, the moment when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identifier C-RNTI;

[0035] The moment when the terminal device successfully receives the retransmission of Message 4 and sends an acknowledgment message to the network device;

[0036] The time when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identity C-RNTI after the terminal device successfully receives the retransmitted message 4;

[0037] The time when the terminal device successfully receives the configuration information of the DCI indicating that blind detection of the DCI scrambled by the C-RNTI is required after successfully receiving the initial transmission of message 4;

[0038] The time when the terminal device successfully receives the configuration information of the DCI indicating that blind detection of the DCI scrambled by the C-RNTI is required after successfully receiving the retransmitted message 4.

[0039] Combined with the second aspect, optionally, for the network device, the time when the network device determines that the initial access of the terminal device is successful is used to indicate one of the following times:

[0040] The time when the network device receives the acknowledgment message sent by the terminal device for the initial transmission message 4 sent by the network device;

[0041] The time when the network device receives the acknowledgment message sent by the terminal device for the retransmitted message 4 sent by the network device;

[0042] The time when the network device sends the configuration information of the DCI indicating that blind detection of the DCI scrambled by the C-RNTI is required to the terminal device after receiving the acknowledgment message sent by the terminal device for the initial transmission message 4 sent by the network device;

[0043] The time when the network device sends the configuration information of the DCI indicating that blind detection of the DCI scrambled by the C-RNTI is required to the terminal device after receiving the acknowledgment message sent by the terminal device for the retransmitted message 4 sent by the network device.

[0044] Combined with the second aspect, optionally, the first downlink bandwidth part is defined according to the control resource set coreset#0 or configured according to the system information block SIB 1.

[0045] Combined with the second aspect, optionally, the identifier of the first control resource set is not 0.

[0046] Combined with the second aspect, optionally, when the first downlink bandwidth part is defined according to coreset#0, the second starting common resource block of the first downlink bandwidth part is determined according to the second starting physical resource block of the first downlink bandwidth part and the first offset;

[0047] Wherein, the first offset is used to indicate the number of physical resource blocks by which the second starting physical resource block differs from the reference point, and the reference point is a common reference point of the resource block grid, and the reference point is used to indicate the center position of subcarrier 0 in the common resource block CRB 0 configured with a preset subcarrier spacing.

[0048] In combination with the second aspect, optionally, the first offset is determined based on a second offset between a second starting physical resource block of the first downlink bandwidth part and a third starting physical resource block of the SS / PBCH block and a common resource block offset of the SS / PBCH block; wherein, the second offset is used to indicate the number of physical resource blocks (PRBs) by which the second starting physical resource block differs from the third starting physical resource block of the SS / PBCH block; the common resource block offset of the SS / PBCH block is used to indicate the number of physical resource blocks by which the common resource block corresponding to the third starting physical resource block differs from the reference point.

[0049] In combination with the second aspect, optionally, when the first downlink bandwidth part is configured according to SIB 1, the second starting common resource block of the first downlink bandwidth part is determined based on the second starting physical resource block of the first downlink bandwidth part and a third offset; wherein, the third offset is used to indicate the number of physical resource blocks by which the second starting physical resource block differs from the reference point, and the reference point is a common reference point of the resource block grid, and the reference point is used to indicate the center position of subcarrier 0 in the common resource block (CRB) 0 configured with a preset subcarrier spacing.

[0050] In a third aspect, an embodiment of the present application provides a possible method for determining the frequency domain position of a control resource set, which is completed by a terminal device and a network device, and includes:

[0051] Before the terminal device successfully initializes access, the network device sends configuration information of a first control resource set to the terminal device; correspondingly, before the terminal device successfully initializes access, the terminal device receives the configuration information of the first control resource set;

[0052] Before the terminal device successfully initializes access, the network device broadcasts uplink and downlink scheduling control information on the downlink physical control channel according to a first set of common resource blocks occupied by the first control resource set; correspondingly, before the terminal device successfully initializes access, the terminal device listens to the downlink physical control channel to obtain uplink and downlink scheduling control information according to the first set of common resource blocks occupied by the first control resource set; the first starting common resource block included in the first set of common resource blocks is determined based on the second starting common resource block of the first downlink bandwidth part and the configuration information of the first control resource set, and the configuration information is used to indicate the position of the physical resource blocks occupied by the first control resource set within the first downlink bandwidth part;

[0053] After the terminal device successfully initializes access, the network device broadcasts uplink and downlink scheduling control information on the downlink physical control channel according to the third common resource block set occupied by the first control resource set; correspondingly, after the terminal device successfully initializes access, the terminal device listens to the downlink physical control channel to obtain uplink and downlink scheduling control information according to the third common resource block set occupied by the first control resource set; the third starting common resource block included in the third common resource block set is determined according to the fourth starting common resource block of the second downlink bandwidth part and the configuration information of the first control resource set, and the configuration information is used to indicate the position of the physical resource block occupied by the first control resource set within the second downlink bandwidth part;

[0054] The second starting common resource block of the first downlink bandwidth part is the same as the fourth starting common resource block of the second downlink bandwidth part.

[0055] In the third aspect, before and after the terminal device successfully initializes access, the frequency domain position of the first control resource set can be determined according to the frequency domain positions of different downlink bandwidth parts. However, since the starting common resource block positions of different downlink bandwidths are set to be the same, it is still possible to make the frequency domain positions of the first control resource set with different downlink bandwidth parts as references the same. In this way, the terminal device and the network device only need to calculate the frequency domain position of the first control resource set once, reducing the complexity of determining the frequency domain position of the first control resource set.

[0056] Combined with the third aspect, optionally, for the terminal device, the successful initialization access of the terminal device recognized is used to indicate one of the following moments:

[0057] The moment when the terminal device successfully receives the initial transmission of Message 4 and sends an acknowledgment message to the network device;

[0058] After the terminal device successfully receives the initial transmission of Message 4, the moment when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identifier C-RNTI;

[0059] The moment when the terminal device successfully receives the retransmission of Message 4 and sends an acknowledgment message to the network device;

[0060] After the terminal device successfully receives the retransmission of Message 4, the moment when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identifier C-RNTI;

[0061] In the case where the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the terminal device successfully receives the initial transmission of Message 4 and sends an acknowledgment message to the network device, the moment when the handover from the first downlink bandwidth part to the second downlink bandwidth part is completed;

[0062] When the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the terminal device successfully receives the retransmitted Message 4 and sends an acknowledgment message to the network device, the time when the handover from the first downlink bandwidth part to the second downlink bandwidth part is completed;

[0063] When the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the terminal device successfully receives the initial transmission of Message 4 and hands over from the first downlink bandwidth part to the second downlink bandwidth part, the time when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identity C-RNTI;

[0064] When the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the terminal device successfully receives the retransmitted Message 4 and hands over from the first downlink bandwidth part to the second downlink bandwidth part, the time when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identity C-RNTI;

[0065] When the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the terminal device successfully receives the initial transmission of Message 4 and hands over from the first downlink bandwidth part to the second downlink bandwidth part, the time when the configuration information for indicating that the DCI scrambled by C-RNTI needs to be blindly detected is received;

[0066] When the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the terminal device successfully receives the initial transmission of Message 4 and hands over from the first downlink bandwidth part to the second downlink bandwidth part, the time when the configuration information for indicating that the DCI scrambled by C-RNTI needs to be blindly detected is received.

[0067] In combination with the third aspect, optionally, for the network device, the time when the network device determines that the initial access of the terminal device is successful is used to indicate one of the following times:

[0068] The time when the network device receives the acknowledgment message sent by the user equipment for the initial transmission of Message 4 sent by the network device;

[0069] The time when the network device receives the acknowledgment message sent by the terminal device for the retransmitted Message 4 sent by the network device;

[0070] After the network device receives the acknowledgment message sent by the terminal device for the initial transmission of Message 4 sent by the network device, the time when the network device sends the configuration information for indicating that the DCI scrambled by C-RNTI needs to be blindly detected to the terminal device;

[0071] After the network device receives the acknowledgment message sent by the terminal device for the retransmission message 4 sent by the network device, it sends to the terminal device the time for indicating the configuration information of the DCI that needs to blindly detect the C-RNTI scrambling;

[0072] In the case where the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the network device receives the acknowledgment message sent by the terminal device for the initial transmission message 4 sent by the network device, the handover completion time from the first downlink bandwidth part to the second downlink bandwidth part;

[0073] In the case where the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the network device receives the acknowledgment message sent by the terminal device for the retransmission message 4 sent by the network device, the handover completion time from the first downlink bandwidth part to the second downlink bandwidth part;

[0074] In the case where the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the network device receives the acknowledgment message sent by the terminal device for the initial transmission message 4 sent by the network device and performs a handover from the first downlink bandwidth part to the second downlink bandwidth part, the time for sending to the terminal device the configuration information of the DCI that needs to blindly detect the C-RNTI scrambling;

[0075] In the case where the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the network device receives the acknowledgment message sent by the terminal device for the retransmission message 4 sent by the network device and performs a handover from the first downlink bandwidth part to the second downlink bandwidth part, the time for sending to the terminal device the configuration information of the DCI that needs to blindly detect the C-RNTI scrambling.

[0076] Combined with the third aspect, optionally, the first downlink bandwidth part is defined according to the control resource set coreset#0, and the second downlink bandwidth part is configured according to the system information block SIB 1.

[0077] Combined with the third aspect, optionally, the identifier of the first control resource set is not 0.

[0078] Combined with the third aspect, optionally, in the case where the first downlink bandwidth part is defined according to coreset#0, the second starting common resource block of the first downlink bandwidth part is determined according to the second starting physical resource block of the first downlink bandwidth part and the first offset; wherein, the first offset is used to indicate the number of physical resource blocks by which the second starting physical resource block differs from the reference point, and the reference point is a common reference point of the resource block grid, and the reference point is used to indicate the center position of subcarrier 0 in the common resource block CRB 0 configured with a preset subcarrier spacing.

[0079] In combination with the third aspect, optionally, the first offset is determined based on a second offset between a second starting physical resource block of the first downlink bandwidth part and a third starting physical resource block of the SS / PBCH block and a common resource block offset of the SS / PBCH block; wherein, the second offset is used to indicate the number of physical resource blocks (PRBs) by which the second starting physical resource block differs from the third starting physical resource block of the SS / PBCH block; the common resource block offset of the SS / PBCH block is used to indicate the number of physical resource blocks by which the third starting physical resource block differs from the reference point.

[0080] In combination with the third aspect, optionally, when the second downlink bandwidth part is configured according to SIB 1, a fourth starting common resource block of the second downlink bandwidth part is determined based on a fourth starting physical resource block of the second downlink bandwidth part and a third offset; wherein, the third offset is used to indicate the number of physical resource blocks by which the fourth starting physical resource block differs from the reference point, the reference point is a common reference point of the resource block grid, and the reference point is used to indicate the center position of subcarrier 0 in common resource block CRB 0 configured with a preset subcarrier spacing.

[0081] Fourth aspect, embodiments of the present application provide a possible method for determining the frequency domain position of a control resource set, which is completed by a terminal device and a network device, and includes:

[0082] After the terminal device successfully initializes access, the network device sends configuration information of a first control resource set to the terminal device; correspondingly, after the terminal device successfully initializes access, the terminal device receives the configuration information of the first control resource set;

[0083] After the terminal device successfully initializes access, the network device broadcasts uplink and downlink scheduling control information on the downlink physical control channel according to a first set of common resource blocks occupied by the first control resource set; correspondingly, after the terminal device successfully initializes access, the terminal device listens to the downlink physical control channel according to the first set of common resource blocks occupied by the first control resource set to obtain uplink and downlink scheduling control information;

[0084] Wherein, a first starting common resource block included in the first set of common resource blocks is determined based on a second starting common resource block of the first downlink bandwidth part and the configuration information of the first control resource set, and the configuration information is used to indicate the position of the physical resource blocks occupied by the first control resource set within the first downlink bandwidth part.

[0085] In a fourth aspect, neither the network device nor the terminal device needs to determine the frequency-domain position of the first control resource set before the terminal device's initial access is successful. After the terminal device's initial access, the frequency-domain position of the first control resource set is determined based on the referenced downlink bandwidth part. In this way, the terminal device and the network device only need to calculate the frequency-domain position of the first control resource set once, reducing the complexity of determining the frequency-domain position of the first control resource set.

[0086] Combined with the fourth aspect, optionally, for the terminal device, the moment when the terminal device determines that the initial access is successful is used to indicate one of the following moments:

[0087] The moment when the terminal device successfully receives the initial transmission of Message 4 and sends an acknowledgment message to the network device;

[0088] After the terminal device successfully receives the initial transmission of Message 4, the moment when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identity C-RNTI;

[0089] The moment when the terminal device successfully receives the retransmission of Message 4 and sends an acknowledgment message to the network device;

[0090] After the terminal device successfully receives the retransmission of Message 4, the moment when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identity C-RNTI;

[0091] The moment when the terminal device receives the configuration information indicating that it needs to blindly detect the DCI scrambled by C-RNTI after successfully receiving the initial transmission of Message 4;

[0092] The moment when the terminal device receives the configuration information indicating that it needs to blindly detect the DCI scrambled by C-RNTI after successfully receiving the retransmission of Message 4.

[0093] Combined with the fourth aspect, optionally, for the network device, the moment when the network device determines that the terminal device's initial access is successful is used to indicate one of the following moments:

[0094] The moment when the network device receives the acknowledgment message sent by the terminal device for the initial transmission of Message 4 sent by the network device;

[0095] The moment when the network device receives the acknowledgment message sent by the terminal device for the retransmission of Message 4 sent by the network device;

[0096] After the network device receives the acknowledgment message sent by the terminal device for the initial transmission of Message 4 sent by the network device, the moment when the network device sends the configuration information indicating that it needs to blindly detect the DCI scrambled by C-RNTI to the terminal device;

[0097] After the network device receives the acknowledgement message sent by the terminal device for the retransmission message 4 sent by the network device, it sends to the terminal device the time for indicating the configuration information of the DCI that needs to be blindly detected with C-RNTI scrambling.

[0098] Combined with the fourth aspect, optionally, the first downlink bandwidth part is configured according to the system information block SIB 1 or the message for configuring other downlink bandwidth parts after the terminal device successfully accesses initially.

[0099] Combined with the fourth aspect, optionally, the identifier of the first control resource set is not 0.

[0100] Combined with the fourth aspect, optionally, when the first downlink bandwidth part is configured according to SIB 1, the second starting common resource block of the first downlink bandwidth part is determined according to the second starting physical resource block of the first downlink bandwidth part and a third offset;

[0101] Wherein, the third offset is used to indicate the number of physical resource blocks by which the second starting physical resource block differs from a reference point, and the reference point is a common reference point of the resource block grid, and the reference point is used to indicate the center position of subcarrier 0 in the common resource block CRB 0 configured with a preset subcarrier spacing.

[0102] Combined with the fourth aspect, optionally, the configuration information of the first control resource set and the configuration information of the first downlink bandwidth part are received simultaneously.

[0103] Fifth aspect, an embodiment of the present application provides an apparatus for determining the frequency domain position of a control resource set. The apparatus can be a terminal device or a chip in the terminal device. The apparatus can include a processing unit and a transceiver unit. When the apparatus is a terminal device, the processing unit can be a processor, and the transceiver unit can be a transceiver; the terminal device can further include a storage unit, and the storage unit can be a memory; the storage unit is used to store instructions, and the processing unit executes the instructions stored in the storage unit so that the terminal device executes the method executed by the terminal device in any one of the first aspect to the fourth aspect and any possible implementation manners thereof. When the apparatus is a chip in the terminal device, the processing unit can be a processor, and the transceiver unit can be an input / output interface, a pin or a circuit, etc.; the processing unit executes the instructions stored in the storage unit so that the terminal device executes the method executed by the terminal device in any one of the first aspect to the fourth aspect and any possible implementation manners thereof, and the storage unit can be a storage unit in the chip (for example, a register, a cache, etc.), or a storage unit outside the chip in the terminal device (for example, a read-only memory, a random access memory, etc.).

[0104] Sixth aspect, an embodiment of the present application provides an apparatus for determining the frequency-domain position of a control resource set. The apparatus may be a network device or a chip within the network device. The apparatus may include a processing unit and a transceiver unit. When the apparatus is a network device, the processing unit may be a processor and the transceiver unit may be a transceiver; the network device may further include a storage unit, and the storage unit may be a memory; the storage unit is used to store instructions, and the processing unit executes the instructions stored in the storage unit so that the network device executes the method performed by the network device in any one of the first aspect to the fourth aspect and any possible implementation manners thereof. When the apparatus is a chip within the network device, the processing unit may be a processor, and the transceiver unit may be an input / output interface, a pin, a circuit, etc.; the processing unit executes the instructions stored in the storage unit so that the network device executes the method performed by the network device in any one of the first aspect to the fourth aspect and any possible implementation manners thereof. The storage unit may be a storage unit within the chip (for example, a register, a cache, etc.), or may be a storage unit outside the chip within the network device (for example, a read-only memory, a random access memory, etc.).

[0105] Seventh aspect, an embodiment of the present application provides a computer program product, which includes: computer program code. When the computer program code runs on a computer, it causes the computer to execute the method performed by the terminal device in any one of the first aspect to the fourth aspect and any possible implementation manners thereof.

[0106] Eighth aspect, an embodiment of the present application provides a computer program product, which includes: computer program code. When the computer program code runs on a computer, it causes the computer to execute the method performed by the network device in any one of the first aspect to the fourth aspect and any possible implementation manners thereof.

[0107] Ninth aspect, an embodiment of the present application provides a computer-readable medium, which stores program code. When the computer program code runs on a computer, it causes the computer to execute the method performed by the terminal device in any one of the first aspect to the fourth aspect and any possible implementation manners thereof.

[0108] Tenth aspect, an embodiment of the present application provides a computer-readable medium, which stores program code. When the computer program code runs on a computer, it causes the computer to execute the method performed by the network device in any one of the first aspect to the fourth aspect and any possible implementation manners thereof. Description of the Drawings

[0109] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the embodiments of the present application will be described below.

[0110] Figure 1 FIG. 1 provides a schematic diagram of a possible communication system architecture for an embodiment of the present application;

[0111] Figure 2 FIG. 2 provides an example diagram of the frequency-domain position of a possible common control resource set for an embodiment of the present application;

[0112] Figure 3 FIG. 3 provides a flowchart of a method for determining the frequency-domain position of a control resource set for an embodiment of the present application;

[0113] Figure 4 FIG. 4 provides an example diagram of the frequency-domain position of a control resource set for an embodiment of the present application;

[0114] Figure 5 FIG. 5 provides an example diagram of the frequency-domain position of a control resource set for an embodiment of the present application;

[0115] Figure 6 FIG. 6 provides an example diagram of the frequency-domain position of a downlink bandwidth part and a first control resource set for an embodiment of the present application;

[0116] Figure 7 FIG. 7 is an example diagram of the time-domain and frequency-domain positions of a first control resource set provided by an embodiment of the present application;

[0117] Figure 8 FIG. 8 is an example diagram of determining the frequency-domain position of a downlink bandwidth part provided by an embodiment of the present application;

[0118] Figure 9 FIG. 9 provides a flowchart of a method for determining the frequency-domain position of a control resource set for an embodiment of the present application;

[0119] Figure 10 FIG. 10 provides an example diagram of the frequency-domain position of a control resource set for an embodiment of the present application;

[0120] Figure 11 FIG. 11 provides an example diagram of the frequency-domain position of a control resource set for an embodiment of the present application;

[0121] Figure 12 FIG. 12 provides a flowchart of a method for determining the frequency-domain position of a control resource set for an embodiment of the present application;

[0122] Figure 13 FIG. 13 provides an example diagram of the frequency-domain position of a control resource set for an embodiment of the present application;

[0123] Figure 14This is a schematic flowchart of a method for determining the frequency-domain position of a control resource set provided by an embodiment of the present application;

[0124] Figure 15 This is an example diagram of the frequency-domain position of a control resource set provided by an embodiment of the present application;

[0125] Figure 16 This is a schematic structural diagram of a terminal device provided by an embodiment of the present application;

[0126] Figure 17 This is a schematic structural diagram of another terminal device provided by an embodiment of the present application;

[0127] Figure 18 This is a schematic structural diagram of a network device provided by an embodiment of the present application;

[0128] Figure 19 This is a schematic structural diagram of another network device provided by an embodiment of the present application. Detailed implementation manners

[0129] Next, the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application.

[0130] Please refer to Figure 1 , Figure 1 This is a schematic architecture diagram of a possible communication system involved in an embodiment of the present application. As Figure 1 shown, the communication system includes a network device 101 and a terminal device 102. The network device 101 and the terminal device 102 can communicate through the air interface technology of the communication system, including scenarios where uplink and downlink scheduling control information is transmitted on the physical downlink control channel (PDCCH).

[0131] Among them, the PDCCH includes the time-frequency position of the commonControlResourceSet. For the frequency-domain position of the commonControlResourceSet, that is, the position of the common resource block (CRB), it is determined with reference to the currently activated downlink bandwidth part. For example, when the currently activated downlink bandwidth part is the initial downlink bandwidth part, the CRB position of the commonControlResourceSet is determined with reference to the initial downlink bandwidth part. For the terminal device, it can listen to the downlink physical control channel at the frequency-domain position of the commonControlResourceSet to obtain the uplink and downlink scheduling control information. For the network device, it can send the uplink and downlink scheduling control information on the downlink physical control channel at the frequency-domain position of the commonControlResourceSet. For example, the uplink and downlink scheduling control information can be the control information for scheduling the random access response, the control information for scheduling the paging message, or the control information for scheduling the system message, etc.

[0132] In the existing technical solutions, there are two configuration methods for the initial downlink bandwidth part (initial DL BWP). One is defined by CORESET#0. In this case, the size and frequency-domain position of the initial downlink bandwidth part are the same as those of CORESET#0, where CORESET is the control resource set. The other is to configure the initial DL BWP in the System Information Block 1 (SIB 1). Before the terminal device successfully initializes access, the initial downlink bandwidth part defined by CORESET#0 becomes effective. After the terminal device successfully initializes access, the initial DL BWP configured in SIB 1 becomes effective. The initial DL BWP configured in SIB 1 can be different from the initial DL BWP defined by CORESET#0, but the frequency-domain position of the initial DL BWP configured in SIB 1 should include the frequency-domain position of CORESET#0.

[0133] When the frequency-domain position of CORESET#0 is inconsistent with the frequency-domain position of the initial DL BWP configured in SIB 1, the frequency-domain positions of the commonControlResourceSet determined by these two configurations are also different. As Figure 2 shown, this figure provides an example diagram of the frequency-domain position of a possible common control resource set provided by an embodiment of the present application.

[0134] As Figure 2 shown, it can be seen that the frequency-domain position of CORESET #0 is inconsistent with the frequency-domain position of the initial DL BWP configured in SIB1, and the starting resource block position RB-x of CORESET #0 is different from the starting resource block position RB-y of the initial DL BWP configured in SIB1. In this case, the starting resource block position of commonControlResourceSet 1 determined according to the initial downlink bandwidth part defined by CORESET #0 is also different from the starting resource block position of commonControlResourceSet 2 determined according to the initial DL BWP configured in SIB1.

[0135] For the terminal device, before the terminal device successfully initializes access, it listens for control information such as scheduling random access responses, paging, and system messages according to the frequency-domain position of commonControlResourceSet 1; after the terminal device successfully initializes access, it listens for information such as scheduling random access responses, paging, and system messages according to the frequency-domain position of commonControlResourceSet 2.

[0136] For the network device, if there are terminal devices that have successfully initialized access and terminal devices that have not successfully initialized access within the coverage area of the network device, the network device needs to send scheduling information such as random access responses, paging, and system messages to the terminal devices that have not successfully initialized access at the frequency-domain position of commonControlResourceSet 1; and needs to send scheduling information such as random access responses, paging, and system messages to the terminal devices that have successfully initialized access at the frequency-domain position of commonControlResourceSet 2.

[0137] It can be seen that in Figure 2 this scenario, in the existing solution, before and after the terminal device successfully initializes access, the calculated frequency-domain position of commonControlResourceSet is different. This results in the same public information being sent on different frequency-domain resources, and both the terminal device and the network device calculate the frequency-domain position of commonControlResourceSet based on whether the access is successful, increasing the complexity of determining the frequency-domain position of commonControlResourceSet.

[0138] In this application Figures 3 to 15In the embodiments, it is possible to calculate the frequency domain position of the commonControlResourceSet before and after the initial access of the terminal device is successful, and the frequency domain positions are the same. In this way, the terminal device and the network device only need to calculate the frequency domain position of the commonControlResourceSet once, reducing the complexity of determining the frequency domain position of the commonControlResourceSet. Specifically, refer to the detailed description of the embodiments of this application below. Figures 3 to 15 of the embodiments.

[0139] The terminal device involved in this application may refer to a user equipment (UE), which can be a handheld terminal, a laptop computer, a subscriber unit, a cellular phone, a smartphone, a personal digital assistant (PDA) computer, a tablet computer, a wireless modem, a handheld device, a laptop computer, a cordless phone, or a wireless local loop (WLL) station, a machine type communication (MTC) terminal, or other devices that can access the mobile network. The terminal device and the network device communicate with each other using a certain air interface technology.

[0140] The network device involved in this application may refer to an access network device, which is mainly responsible for functions such as radio resource management, quality of service (QoS) management, data compression, and encryption on the air interface side. The network device may include various forms of base stations, such as: macro base stations, micro base stations (also called small stations), relay stations, access points, etc. In systems using different radio access technologies, the names of the devices with base station functions may be different. For example, in the fifth generation (5G) system, it is called a gNB; in the fourth generation (4G) system, it is called an evolved NodeB (eNB or eNodeB), etc.

[0141] It can be understood that the first control resource set involved in this application may also be a common control resource set or a control resource set named in other ways, and the embodiments of this application do not limit this.

[0142] Embodiments of this application can also be applied to other communication systems that need to determine the frequency-domain position of the control resource set. The term "system" can be interchanged with "network". The system architecture described in the embodiments of this application is for facilitating the description of the technical solutions of the embodiments of this application, and does not constitute a limitation on the technical solutions provided by the embodiments of this application. Those of ordinary skill in the art know that with the evolution of the network architecture, the technical solutions provided by the embodiments of this application are equally applicable to similar technical problems. In the description of this application, "a plurality of" means two or more than two, and "at least two" means two or more than two.

[0143] Next, the specific implementation manners of the embodiments of this application will be introduced.

[0144] Based on Figure 1 the communication system shown, please refer to Figure 3 , which is a schematic flowchart of a method for determining the frequency-domain position of a control resource set provided by an embodiment of this application. Figure 3 The method shown includes steps 301 to 303.

[0145] 301. Before the terminal device successfully initializes access, the network device sends the configuration information of the first control resource set to the terminal device.

[0146] Correspondingly, before the terminal device successfully initializes access, the terminal device receives the configuration information of the first control resource set.

[0147] 302. Before the terminal device successfully initializes access, the network device sends uplink and downlink scheduling control information on the downlink physical control channel according to the first common resource block set occupied by the first control resource set.

[0148] Correspondingly, before the terminal device successfully initializes access, the terminal device listens to the downlink physical control channel to obtain uplink and downlink scheduling control information according to the first common resource block set occupied by the first control resource set.

[0149] 303. After the terminal device successfully initializes access, the network device sends uplink and downlink scheduling control information on the downlink physical control channel according to the first common resource block set occupied by the first control resource set.

[0150] Correspondingly, after the terminal device successfully initializes access, the terminal device listens to the downlink physical control channel to obtain uplink and downlink scheduling control information according to the first common resource block set occupied by the first control resource set.

[0151] Since the number of uplink and downlink scheduling control information sent by the network device is uncertain, the embodiments of this application do not limit the number of executions of steps 302 and 303.

[0152] Among them, the configuration information is used to indicate the position of the physical resource blocks (PRBs) occupied by the first control resource set within the first downlink bandwidth part. The identifier of the first control resource set in this application is not 0.

[0153] Optionally, the configuration information of the first control resource set can be obtained from SIB 1, and this configuration information can take effect both before and after the terminal device successfully initializes access. Here, taking effect means that the terminal device can listen for the downlink physical control channel according to the frequency-domain position of the first control resource set to obtain the uplink and downlink scheduling control information; or, the network device can send the uplink and downlink scheduling control information on the downlink physical control channel according to the frequency-domain position of the first control resource set.

[0154] Optionally, in a scenario where the first downlink bandwidth part included is the initial DL BWP configured by SIB 1, the configuration information of the first downlink bandwidth part can also be obtained from SIB 1, but the configuration information of the first downlink bandwidth part configured by SIB 1 takes effect after the terminal device successfully initializes access. Here, taking effect means that the downlink control information can be received according to the frequency-domain position of the first downlink bandwidth part configured by SIB 1, or the network device can send the downlink control information according to the frequency-domain position of the first downlink bandwidth part configured by SIB 1. Among them, the terminal device can determine the frequency-domain position of the first downlink bandwidth part by using a high-layer signaling locationAndBandwidth and / or other parameters of the first downlink bandwidth part.

[0155] The first common resource block occupied by the first control resource set includes the first starting common resource block and the common resource blocks occupied by the first control resource set. In the embodiments of this application, both the network device and the terminal device can implement determining the first starting common resource block, and can both implement determining the common resource blocks starting from the first starting common resource block occupied by the first control resource set according to the configuration information and the starting common resource block of the downlink bandwidth part referred to. The methods for determining the first starting common resource block can be introduced in the following two cases (Case A1 and Case A2).

[0156] In Case A1, please refer to Figure 4 , which provides an example diagram of the frequency-domain position of a control resource set for the embodiments of this application. In Figure 4Among them, the first downlink bandwidth part is the initial DL BWP defined by CORESET #0, and the first starting common resource block of the first control resource set is determined according to the second starting common resource block of CORESET #0 and the configuration information of the first control resource set. Specifically, after determining the second starting common resource block of CORESET #0, the detailed process of determining the first starting common resource block can be referred to Figure 6 for a detailed introduction. Among them, the fourth offset refers to the number of common resource blocks by which the second starting common resource block of CORESET #0 differs from the first starting common resource block of the first control resource set.

[0157] Among them, the second starting common resource block of CORESET #0 refers to the smallest CRB occupied by CORESET #0; the first starting common resource block of the first control resource set refers to the smallest CRB occupied by the first control resource set. The second starting common resource block of CORESET #0 is determined according to the second starting physical resource block of CORESET #0 and the first offset. The first offset is used to indicate the number of physical resource blocks by which the second starting physical resource block differs from the reference point. The reference point is a common reference point of the resource block grid, and the reference point is used to indicate the center position of subcarrier 0 in the common resource block CRB 0 configured with a preset subcarrier spacing. As Figure 4 shown, the common reference point can be the position of reference point A (point A), which indicates the center position of subcarrier 0 in the common resource block CRB 0.

[0158] The first offset is determined according to the second offset between the second starting physical resource block of the first downlink bandwidth part and the third starting physical resource block of the SS / PBCH block (Synchronization / Physical Broadcast Channel block) and the common resource block offset of the SS / PBCH block. Among them, the second offset is used to indicate the number of physical resource blocks by which the second starting physical resource block differs from the third starting physical resource block of the SS / PBCH block; the common resource block offset of the SS / PBCH block is used to indicate the number of physical resource blocks by which the third starting physical resource block differs from the reference point, as Figure 4 shown as the offset relative to reference point A So the first offset is equal to minus the value of the second offset. Among them, the third starting physical resource block is the RB with the smallest RB index value of the CRB that overlaps with the first RB of the SS / PBCH block.

[0159] Only the determination method of the second starting common resource block of CORESET #0 is briefly introduced here. For further details, please refer to Figure 8 for a detailed description.

[0160] Based on the first case A1, optionally, in practical applications, only the first downlink bandwidth part can be determined by CORESET #0. In this case, only the frequency domain position of the first control resource set can be determined based on the first downlink bandwidth part defined by CORESET #0. Or, optionally, in practical applications, the first downlink bandwidth part can be defined by CORESET #0 and the first downlink bandwidth part can be configured by SIB 1. In this case, the frequency domain position of the first control resource set is selected to be determined based on the first downlink bandwidth part defined by CORESET #0.

[0161] For the terminal device, before the terminal device successfully initializes the access, the configuration information of the first control resource set can be obtained in the SIB 1 message. For the network device, before the terminal device successfully initializes the access, the configuration information of the first control resource set can be carried in the SIB1 message. The terminal device and the network device can determine the first starting common resource position of the first control resource set according to the second starting common resource block of CORESET #0. Before the terminal device successfully initializes the access, the terminal device Figure 4 as shown in the first control resource set 1 listens to the downlink physical control channel to obtain the uplink and downlink scheduling control information. The network device Figure 4 as shown in the first control resource set 1 sends the uplink and downlink scheduling control information on the downlink physical control channel. After the terminal device successfully initializes the access, the terminal device Figure 4 as shown in the first control resource set 2 listens to the downlink physical control channel to obtain the uplink and downlink scheduling control information. The network device Figure 4 as shown in the first control resource set 2 sends the uplink and downlink scheduling control information on the downlink physical control channel. The frequency domain position of the first control resource set determined by this method is the same. The terminal device and the network device only need to calculate the position of the first control resource set once, which reduces the complexity of determining the frequency domain position of the first control resource set.

[0162] The embodiment of the present application does not limit the determination time of the frequency domain position of the first control resource set. The frequency domain position of the first control resource set can be determined according to the configuration information and the frequency domain position of the first downlink bandwidth part defined by CORESET #0 before the terminal device successfully initializes the access, or the frequency domain position of the first control resource set can be determined according to the configuration information and the frequency domain position of the first downlink bandwidth part defined by CORESET #0 after the successful initialization of the access.

[0163] In the second case A2, please refer to Figure 5, which provides another example diagram for controlling the frequency-domain position of the resource set in the embodiments of the present application. In Figure 5 , the first downlink bandwidth part is the initial DL BWP configured by SIB 1, and the first starting common resource block of the first control resource set is determined according to the second starting common resource block of the first downlink bandwidth part configured by SIB 1 and the configuration information of the first control resource set. Specifically, after determining the second starting common resource block of the first downlink bandwidth part configured by SIB 1, the detailed process of determining the first starting common resource block of the first control resource set can be referred to Figure 6 for a detailed introduction. Among them, the fifth offset refers to the number of common resource blocks by which the second starting common resource block of the first downlink bandwidth part configured by SIB 1 differs from the first starting common resource block of the first control resource set.

[0164] Among them, when the first downlink bandwidth part is configured according to SIB 1, the second starting common resource block of the first downlink bandwidth part is determined according to the second starting physical resource block of the first downlink bandwidth part and the third offset; among them, the third offset is used to indicate the number of physical resource blocks by which the second starting physical resource block differs from the reference point. The reference point is a common reference point of the resource block grid, and the reference point is used to indicate the center position of subcarrier 0 in the common resource block CRB 0 configured with a preset subcarrier spacing. As Figure 5 shown, the common reference point can be the position of reference point A (point A), which indicates the center position of subcarrier 0 in the common resource block CRB 0. Here, only the determination method of the second starting common resource block of the first downlink bandwidth part configured by SIB 1 is briefly introduced. For a detailed introduction, please refer to Figure 8 for a detailed description.

[0165] Based on the second case of A, optionally, in practical applications, there may be only one way to configure the first downlink bandwidth part through SIB 1. In this case, the frequency-domain position of the first control resource set can only be determined based on the first downlink bandwidth part configured by SIB 1. Or, optionally, in practical applications, the first downlink bandwidth part can be configured through CORESET#0 and SIB 1. In this case, it is selected to determine the frequency-domain position of the first control resource set based on the first downlink bandwidth part configured by SIB 1.

[0166] For a terminal device, before the terminal device successfully initializes access, it can obtain the configuration information of the first control resource set in the SIB 1 message. For a network device, before the terminal device successfully initializes access, it can carry the configuration information of the first control resource set in the SIB1 message. The terminal device and the network device can determine the first starting common resource position of the first control resource set according to the second starting common resource block of the first downlink bandwidth part configured by SIB 1. Before the terminal device successfully initializes access, the terminal device listens for the downlink physical control channel according to Figure 5 the first control resource set 1 shown to obtain uplink and downlink scheduling control information, and the network device sends uplink and downlink scheduling control information on the downlink physical control channel according to Figure 5 the first control resource set 1 shown. After the terminal device successfully initializes access, the terminal device listens for the downlink physical control channel according to Figure 5 the first control resource set 2 shown to obtain uplink and downlink scheduling control information, and the network device sends uplink and downlink scheduling control information on the downlink physical control channel according to Figure 5 the first control resource set 2 shown. The frequency domain position of the first control resource set determined by this method is the same. The terminal device and the network device only need to calculate the position of the first control resource set once, reducing the complexity of determining the frequency domain position of the first control resource set.

[0167] In the embodiments of this application, the determination time of the frequency domain position of the first control resource set by the terminal device is not limited. The frequency domain position of the first control resource set can be determined according to the configuration information and the frequency domain position of the first downlink bandwidth part configured by SIB 1 before the terminal device successfully initializes access, or the frequency domain position of the first control resource set can be determined according to the configuration information and the frequency domain position of the first downlink bandwidth part configured by SIB 1 after the terminal device successfully initializes access.

[0168] Among them, Figure 3 、 Figure 4 and Figure 5 the moment T represents the moment when the terminal device successfully initializes access. The network device and the terminal device may have different identifications of the moment T. In an alternative implementation, for the terminal device, the moment when the terminal device determines successful initialization access is used to indicate one of the following (3-1), (3-2), (3-3), (3-4), (3-5), (3-6):

[0169] (3-1) The moment when the terminal device successfully receives the initial transmission of message 4 and sends an acknowledgment message to the network device;

[0170] The moment when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identifier (C-RNTI) after successfully receiving the initial transmission of Message 4;

[0171] The moment when the terminal device successfully receives the retransmission of Message 4 and sends an acknowledgement message to the network device;

[0172] The moment when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identifier C-RNTI after successfully receiving the retransmission of Message 4;

[0173] The moment when the terminal device successfully receives the configuration information for indicating the DCI scrambled by the C-RNTI that needs to be blindly detected after successfully receiving the initial transmission of Message 4;

[0174] The moment when the terminal device successfully receives the configuration information for indicating the DCI scrambled by the C-RNTI that needs to be blindly detected after successfully receiving the retransmission of Message 4.

[0175] For the network device, the moment when the network device determines the successful initial access is used to indicate one of the following (3-7), (3-8), (3-9), (3-10):

[0176] The moment when the network device receives the acknowledgement message sent by the terminal device for the initial transmission of Message 4 sent by the network device;

[0177] The moment when the network device receives the acknowledgement message sent by the terminal device for the retransmission of Message 4 sent by the network device;

[0178] The moment when the network device sends the configuration information for indicating the DCI scrambled by the C-RNTI that needs to be blindly detected to the terminal device after receiving the acknowledgement message sent by the terminal device for the initial transmission of Message 4 sent by the network device;

[0179] The moment when the network device sends the configuration information for indicating the DCI scrambled by the C-RNTI that needs to be blindly detected to the terminal device after receiving the acknowledgement message sent by the terminal device for the retransmission of Message 4 sent by the network device.

[0180] In the embodiments of the present application, the frequency domain position of the first control resource set before and after the successful initial access of the terminal device is the same. In this way, the terminal device and the network device only need to calculate the frequency domain position of the first control resource set once, reducing the complexity of determining the frequency domain position of the first control resource set.

[0181] Please refer to Figure 6 , which provides an example diagram of the frequency domain position of the downlink bandwidth part and the first control resource set. Within one DL BWP of one cell, the network device can indicate the resource allocation of the first control resource set within one BWP through the higher layer signaling frequencyDomainResources. Here, frequencyDomainResources is the configuration information of the first control resource set involved in this application. According to the protocol description, frequencyDomainResources is a 45-bit bitmap. The 45-bitmap indicates the frequency domain resource allocation of the first control resource set within the first downlink bandwidth part, and each bit indicates six consecutive non-overlapping physical resource blocks (Physical Resource Blocks, PRBs). The first starting common resource block index of the first control resource set is aligned with a multiple of 6 of the common resource block index.

[0182] As Figure 6 shown, assuming that the starting common resource block index of the downlink bandwidth part is then since the index of the first starting common resource block of the first control resource set must be a multiple of 6, the starting common resource block of frequencyDomainResources is Specifically, it means that the six PRBs indicated by the first bit of the 45-bitmap start from CRB 36 and are arranged upwards in sequence. If the bit value is 1, it means that the corresponding six consecutive PRBs are allocated to the first control resource set. If the bit value is 0, it means that the corresponding six consecutive PRBs are not allocated to the first control resource set. If the PRB part indicated by the bit exceeds the downlink bandwidth part, the excess part is set to 0, indicating that it is not allocated to the first control resource set.

[0183] For example, in the case of frequencyDomainResources = "00000111111110...", it can be seen that the 30 PRBs corresponding to the first 5 bits are not allocated to the first control resource set. The index of the first starting common resource block of the first control resource set is 36 + 30 = 66, that is, the first starting common resource block of the first control resource set is CRB 66. Taking the Figure 6 downlink bandwidth part as Figure 4 shown in the case of the first bandwidth defined by CORESET#0, in this way Figure 4The fourth offset may be CRB 66 - CRB 33 = CRB 33, specifically indicating that there is a difference of 33 common resource blocks between the first starting common resource block of the first control resource set and the starting common resource block of the downlink bandwidth part.

[0184] Optionally, Figure 6 The downlink bandwidth part (DL BWP) involved in [reference] may be the initial downlink bandwidth part defined by CORESET #0, or may be the initial downlink bandwidth part configured by SIB 1, or may be a newly configured initial DL BWP, or may be other DL BWPs, etc. For various possible configuration cases of the above downlink bandwidth parts, reference can be made to Figure 6 the description of determining the first starting common resource block of the first control resource set based on the common starting position of the downlink bandwidth part and the configuration information of the first control resource set.

[0185] Furthermore, please refer to Figure 7 which provides an example diagram of the time-domain resources of a first control resource set for an embodiment of this application. In a specific implementation, a network device may configure a first control resource set for a terminal device through a configuration message of the first control resource set in a high-layer signaling (such as a Radio Resource Control (RRC) signaling), where the configuration message includes parameters such as the CORESET id of the first control resource set, frequency-domain resource indication, the number of consecutive OFDM symbols in the time domain, etc. The number of consecutive OFDM symbols in the time domain may take one value among 1, 2, and 3. The frequency-domain resource indication may be the Figure 6 45-bit bitmap shown in [reference]. The network device configures 1 search space set for the terminal device through a SearchSpace configuration message in a high-layer signaling (such as an RRC signaling), where the configuration message includes parameters such as the search space set id, the indication of the monitoring occasion in 1 time slot (slot), the aggregation level, and the corresponding number of candidate PDCCHs, etc. For example: The time-domain position of the first control resource set blindly detected within the search space is as shown in Figure 7 [reference], the indication of the monitoring occasion of the search space within 1 slot 0 is on the first symbol within 1 slot 0, and the first control resource set corresponding to the CORESET id in the search space lasts for 3 symbols in the time domain, such as the symbols 0 to 2 in Figure 7 [reference]. The frequency-domain resource position of the first control resource set is determined by the 45-bit bitmap. In addition, the specific process of determining the frequency-domain position of the first control resource set can refer to the introduction of the method shown in Figure 6 [reference].

[0186] When the downlink bandwidth part is defined by CORESET #0 or configured by SIB 1, assuming that the initial downlink bandwidth part defined by CORESET #0 is represented by downlink bandwidth part one, and the initial downlink bandwidth part configured by SIB 1 is represented by downlink bandwidth part two, the detailed determination process of the frequency domain positions of downlink bandwidth part one and downlink bandwidth part two can be found in Figure 8 the detailed description. For the convenience of applying to each embodiment, the common resource blocks of downlink bandwidth part one are represented by the fifth common resource block here. The fifth common resource block includes the fifth starting common resource block and other common resource blocks occupied by downlink bandwidth part one; the common resource blocks of downlink bandwidth part two are represented by the sixth common resource block here. The sixth common resource block includes the sixth starting common resource block and other common resource blocks occupied by downlink bandwidth part two.

[0187] (1) After the terminal device detects the SS / PBCH block within the operating bandwidth, the ssb-SubcarrierOffset(K SSB ) in the MIB indicates the subcarrier offset between the RB with the smallest RB index value of the CRB overlapping with the first RB of the SS / PBCH block and the first RB of the SS / PBCH block; the RB with the smallest index value of the CRB overlapping with the first RB of the SS / PBCH block is the third starting physical resource block of the SS / PBCH block involved in this application.

[0188] (2) Obtain the high 4 bits of pdcch-ConfigSIB 1 in the MIB. The high four bits indicate the second offset between the SS / PBCH block and downlink bandwidth part one.

[0189] The second offset here refers to the number of physical resource blocks between the fifth starting physical resource block of downlink bandwidth part one and the third starting physical resource block of the SS / PBCH block, and the second offset is in units of PRB.

[0190] In this way, the fifth starting physical resource block of downlink bandwidth part one can be determined according to the third starting physical resource block of the SS / PBCH block and the second offset.

[0191] (3) According to listening to the DCI format 1_0 scrambled by SI-RNTI in downlink bandwidth part one, obtain the scheduling information of SIB 1, and receive the SIB 1 message on the scheduled time-frequency resources. By obtaining ServingCellConfigCommonSIB in the SIB 1 message, the following information can be obtained:

[0192] I. Offset relative to reference point A (offsetToPointA): It is used to indicate the PRB offset between the third starting physical resource position of the cell - defining SS / PBCH block and Point A. Here, the third starting physical resource position refers to the smallest index value RB of the CRB that overlaps with the first RB of the SS / PBCH block.

[0193] In this way, the third starting common resource block of the SS / PBCH block can be determined based on offsetToPointA and the third starting physical resource position of the SS / PBCH block. The third starting common resource block refers to the RB with the smallest index value of the CRB that overlaps with the first RB of the SS / PBCH block.

[0194] Furthermore, offsetToPointA combined with the second offset in (2) can determine the first offset. Based on the first offset and the fifth starting physical resource block of the first downlink bandwidth part, the fifth starting common resource block of the first downlink bandwidth part can be determined. The fifth starting common resource block refers to the lowest common resource block occupied by the first downlink bandwidth part.

[0195] II. locationAndBandwidth: It is used to indicate information such as the starting physical resource block containing the second downlink bandwidth part and the number of common resource blocks it occupies, as Figure 8 shown.

[0196] III. carrierBandwidth: It is used to indicate a set of carriers corresponding to different sub - carrier intervals and the width of each carrier in the frequency domain;

[0197] OffsetToCarrier: It is used to indicate the frequency domain offset from the lowest available sub - carrier of each carrier to Point A, where Point A is the center position of sub - carrier 0 of the Common RB.

[0198] In this way, by combining II and III, the sixth starting common resource block of the second downlink bandwidth part and other common resource blocks occupied by the second downlink bandwidth part can be determined. The sixth starting common resource block refers to the lowest common resource block occupied by the second downlink bandwidth part.

[0199] Among them, the resource block grid involved in each embodiment of the present application is used to map physical resources. When the physical layer performs resource mapping, the time-frequency resource unit (Resource Element, RE) is used as the basic unit. One RE consists of one symbol in the time domain and one subcarrier in the frequency domain. One resource block (Resource Block, RB) is composed of all OFDM symbols in one time slot and 12 subcarriers in the frequency domain. The position of the RE is represented by (k, l), where k represents the OFDM serial number and l represents the subcarrier serial number. By giving the coordinates (k, l), the specified RE can be located.

[0200] Optionally, before the terminal device initially accesses, when the network device configures the configuration information of the first control resource set, the terminal device can obtain the configuration information of the first control resource set through ServingCellConfigCommonSIB in the SIB 1 message, and then can determine the first starting common resource block of the first control resource set with the following row bandwidth part one as the reference, or determine the first starting common resource block of the first control resource set with the following row bandwidth part two as the reference.

[0201] Based on Figure 1 the communication system shown, please refer to Figure 9 , which is a schematic flowchart of another method provided by the embodiments of the present application for determining the frequency domain position of the control resource set. Figure 9 The method shown includes step 901 and step 902.

[0202] 901. Before the terminal device initially accesses successfully, the network device sends the configuration information of the first control resource set to the terminal device.

[0203] Correspondingly, before the terminal device initially accesses successfully, the terminal device receives the configuration information of the first control resource set.

[0204] 902. After the terminal device initially accesses successfully, the network device sends the uplink and downlink scheduling control information on the downlink physical control channel according to the first common resource block set occupied by the first control resource set.

[0205] Correspondingly, after the terminal device initially accesses successfully, the terminal device listens to the downlink physical control channel to obtain the uplink and downlink scheduling control information according to the first common resource block set occupied by the first control resource set.

[0206] Among them, the configuration information is used to indicate the position of the physical resource block occupied by the first control resource set within the first downlink bandwidth part. The identifier of the first control resource set of the present application is not 0.

[0207] Before the terminal device successfully initializes the access, the terminal device does not monitor the downlink physical control channel according to the common resource block set occupied by the first control resource set. Moreover, the frequency-domain position of the first control resource set is determined with reference to a downlink bandwidth part. For specific details, please refer to Figure 10 and Figure 11 for the specific introduction.

[0208] Optionally, the configuration information of the first control resource set can be obtained from SIB 1, and this configuration information becomes effective after the terminal device successfully initializes the access. Here, "becoming effective" means that the terminal device can monitor the downlink physical control channel according to the frequency-domain position of the first control resource set to obtain uplink and downlink scheduling control information; or, the network device can send uplink and downlink scheduling control information on the downlink physical control channel according to the frequency-domain position of the first control resource set.

[0209] Optionally, in a scenario where the first downlink bandwidth part includes the initial DL BWP configured by SIB 1, the configuration information of the first downlink bandwidth part can also be obtained from SIB 1, but the configuration information of the first downlink bandwidth part configured by SIB 1 becomes effective after the terminal device successfully initializes the access. Here, "becoming effective" means that the downlink control information can be received according to the frequency-domain position of the first downlink bandwidth part configured by SIB 1, or the network device can send downlink control information according to the frequency-domain position of the first downlink bandwidth part configured by SIB 1. Among them, the terminal device can determine the frequency-domain position of the first downlink bandwidth part by using a high-layer signaling locationAndBandwidth and / or other parameters of the first downlink bandwidth part.

[0210] The first common resource block occupied by the first control resource set includes the first starting common resource block and other common resource blocks occupied by the first control resource set. In the embodiments of the present application, both the network device and the terminal device can determine the first starting common resource block, and can also determine the common resource blocks starting from the first starting common resource block occupied by the first control resource set according to the configuration information and the starting common resource block of the referenced downlink bandwidth part. There are two cases (Case B1 and Case B2) to introduce how to determine the first starting common resource block.

[0211] In Case B1, please refer to Figure 10 , which provides another example diagram of the frequency-domain position of a control resource set for the embodiments of the present application. In Figure 10Among them, the first downlink bandwidth part is the initial DL BWP defined by CORESET#0, and the first starting common resource block of the first control resource set is determined according to the second starting common resource block of CORESET#0 and the configuration information of the first control resource set. Specifically, after determining the second starting common resource block of CORESET#0, the detailed process of determining the first starting common resource block can be referred to Figure 6 for a detailed introduction. Among them, the fourth offset refers to the number of common resource blocks by which the second starting common resource block of CORESET#0 differs from the first starting common resource block of the first control resource set.

[0212] Among them, the second starting common resource block of CORESET#0 refers to the smallest CRB occupied by CORESET#0; the first starting common resource block of the first control resource set refers to the smallest CRB occupied by the first control resource set. The second starting common resource block of CORESET#0 is determined according to the second starting physical resource block of CORESET#0 and the first offset. The first offset is used to indicate the number of physical resource blocks by which the second starting physical resource block differs from the reference point. The reference point is a common reference point of the resource block grid, and the reference point is used to indicate the center position of subcarrier 0 in common resource block CRB 0 configured with a preset subcarrier spacing. As Figure 10 shown, the common reference point can be the position of reference point A (point A), which indicates the center position of subcarrier 0 in common resource block CRB 0.

[0213] The first offset is determined according to the second offset between the second starting physical resource block of the first downlink bandwidth part and the third starting physical resource block of the SS / PBCH block and the common resource block offset of the SS / PBCH block. Among them, the second offset is used to indicate the number of physical resource blocks by which the second starting physical resource block differs from the third starting physical resource block of the SS / PBCH block; the common resource block offset of the SS / PBCH block is used to indicate the number of physical resource blocks by which the third starting physical resource block differs from the reference point, as Figure 10 shown as the offset relative to reference point A So the first offset is equal to minus the value of the second offset. Among them, the third starting physical resource block is the RB with the smallest RB index value among the CRBs overlapping with the first RB of the SS / PBCH block.

[0214] Here only a simple introduction to the determination method of the second starting common resource block of CORESET#0 is given. For further details, please refer to Figure 8 for a detailed description.

[0215] Based on Case B1, optionally, in actual applications, there may be only one way to configure the first downlink bandwidth part, which is defined by CORESET#0 in this case. Or, optionally, in actual applications, the first downlink bandwidth part can be configured / defined by CORESET#0 and SIB 1. In this case, the frequency-domain position of the first control resource set is determined by selecting the first downlink bandwidth part defined by CORESET#0.

[0216] For the terminal device, before the terminal device successfully initializes the access, it can obtain the configuration information of the first control resource set in the SIB 1 message. For the network device, before the terminal device successfully initializes the access, it can carry the configuration information of the first control resource set in the SIB1 message. The terminal device and the network device can determine the first starting common resource position of the first control resource set according to the second starting common resource block of CORESET#0. After the terminal device successfully initializes the access, the terminal device Figure 10 listens for the downlink physical control channel according to the first control resource set shown to obtain the uplink and downlink scheduling control information, and the network device Figure 10 sends the uplink and downlink scheduling control information on the downlink physical control channel according to the first control resource set shown. The frequency-domain positions of the first control resource set determined by this method are the same. The terminal device and the network device only need to calculate the position of the first control resource set once, reducing the complexity of determining the frequency-domain position of the first control resource set.

[0217] The embodiments of the present application do not limit the determination time of the frequency-domain position of the first control resource set. The frequency-domain position of the first control resource set can be determined according to the configuration information and the frequency-domain position of the first downlink bandwidth part defined by CORESET#0 before the terminal device successfully initializes the access, or the frequency-domain position of the first control resource set can be determined according to the configuration information and the frequency-domain position of the first downlink bandwidth part defined by CORESET#0 after the terminal device successfully initializes the access.

[0218] In Case B2, please refer to Figure 11 for another example diagram of the frequency-domain position of the control resource set provided by the embodiments of the present application. In Figure 11 , the first downlink bandwidth part is the initial DL BWP configured by SIB 1, and the first starting common resource block of the first control resource set is determined according to the second starting common resource block of the first downlink bandwidth part configured by SIB 1 and the configuration information of the first control resource set. Specifically, after determining the second starting common resource block of the first downlink bandwidth part configured by SIB 1, the detailed process of determining the first starting common resource block of the first control resource set can be found in Figure 6A detailed introduction is provided. Among them, the fifth offset refers to the number of common resource blocks by which the second starting common resource block of the first downlink bandwidth part configured by SIB 1 differs from the first starting common resource block of the first control resource set.

[0219] Among them, when the first downlink bandwidth part is configured according to SIB 1, the second starting common resource block of the first downlink bandwidth part is determined based on the second starting physical resource block of the first downlink bandwidth part and the third offset; among them, the third offset is used to indicate the number of physical resource blocks by which the second starting physical resource block differs from the reference point, and the reference point is a common reference point of the resource block grid, and the reference point is used to indicate the center position of subcarrier 0 in the common resource block CRB 0 configured with a preset subcarrier spacing. As Figure 11 shown, the common reference point can be the position of reference point A (point A), which indicates the center position of subcarrier 0 in the common resource block CRB 0. Here, only a simple introduction to the determination method of the second starting common resource block of the first downlink bandwidth part configured by SIB 1 is provided. For a detailed introduction, please refer to Figure 8 the detailed description.

[0220] Based on the second case of B, optionally, in actual applications, there can be only one way to configure the first downlink bandwidth part, and in this case, it is configured by SIB 1. Or, optionally, in actual applications, the first downlink bandwidth part can be configured by CORESET#0 and SIB 1. In this case, the frequency domain position of the first control resource set is determined by selecting the first downlink bandwidth part configured by SIB 1.

[0221] For the terminal device, before the terminal device successfully initializes access, it can obtain the configuration information of the first control resource set in the SIB 1 message. For the network device, before the terminal device successfully initializes access, it can carry the configuration information of the first control resource set in the SIB1 message. The terminal device and the network device can determine the first starting common resource position of the first control resource set according to the second starting common resource block of the first downlink bandwidth part configured by SIB 1. After the terminal device successfully initializes access, the terminal device listens for the downlink physical control channel according to Figure 11 the first control resource set shown to obtain the uplink and downlink scheduling control information, and the network device sends the uplink and downlink scheduling control information on the downlink physical control channel according to Figure 11 the first control resource set shown. The frequency domain position of the first control resource set determined by this method is the same. The terminal device and the network device only need to calculate the position of the first control resource set once, reducing the complexity of determining the frequency domain position of the first control resource set.

[0222] The embodiments of the present application do not limit the determination time of the frequency domain position of the first control resource set. The frequency domain position of the first control resource set can be determined according to the configuration information and the frequency domain position of the first downlink bandwidth part configured by SIB 1 before the terminal device successfully initializes the access, or the frequency domain position of the first control resource set can be determined according to the configuration information and the frequency domain position of the first downlink bandwidth part configured by SIB 1 after the terminal device successfully initializes the access.

[0223] Among them, Figure 9 、 Figure 10 and Figure 11 the moment T represents the moment when the terminal device successfully initializes the access. The network device and the terminal device may have different identifications of the moment T. In an optional implementation, for the terminal device, the moment when the terminal device determines the successful initialization of the access is used to indicate one of the following moments (10-1), (10-2), (10-3), (10-4), (10-5), (10-6):

[0224] (10-1) The moment when the terminal device successfully receives the initial transmission of message 4 and sends an acknowledgment message to the network device;

[0225] (10-2) After the terminal device successfully receives the initial transmission of message 4, the moment when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identifier C-RNTI;

[0226] (10-3) The moment when the terminal device successfully receives the retransmission of message 4 and sends an acknowledgment message to the network device;

[0227] (10-4) After the terminal device successfully receives the retransmission of message 4, the moment when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identifier C-RNTI;

[0228] (10-5) The moment when the terminal device successfully receives the configuration information for indicating the DCI scrambled by C-RNTI that needs to be blindly detected after successfully receiving the initial transmission of message 4;

[0229] (10-6) The moment when the terminal device successfully receives the configuration information for indicating the DCI scrambled by C-RNTI that needs to be blindly detected after successfully receiving the retransmission of message 4.

[0230] For the network device, the moment when the network device determines the successful initialization of the access is used to indicate one of the following moments (10-7), (10-8), (10-9), (10-10):

[0231] (10-7) The moment when the network device receives the acknowledgment message sent by the terminal device for the initial transmission message 4 sent by the network device;

[0232] (10-8) The time when the network device receives the acknowledgment message for the retransmission message 4 sent by the network device from the terminal device;

[0233] (10-9) The time when, after the network device receives the acknowledgment message for the initial transmission message 4 sent by the network device from the terminal device, the network device sends the configuration information of the DCI indicating that blind detection of the DCI scrambled by the C-RNTI is required to the terminal device;

[0234] (10-10) The time when, after the network device receives the acknowledgment message for the retransmission message 4 sent by the network device from the terminal device, the network device sends the configuration information of the DCI indicating that blind detection of the DCI scrambled by the C-RNTI is required to the terminal device.

[0235] In the embodiments of the present application, before the terminal device successfully initializes access, the network device does not send the uplink and downlink scheduling control information on the downlink physical control channel according to the common resource block set occupied by the first control resource set, and the terminal device does not listen for the downlink physical control channel according to the frequency domain position of the first control resource set. In this way, neither the network device nor the terminal device needs to determine the frequency domain position of the first control resource set before the terminal device successfully initializes access. After the terminal device successfully initializes access, the frequency domain position of the first control resource set is determined based on the referenced downlink bandwidth part. In this way, both the terminal device and the network device only need to calculate the frequency domain position of the first control resource set once, reducing the complexity of determining the frequency domain position of the first control resource set.

[0236] Based on Figure 1 the communication system shown, please refer to Figure 12 , which is a schematic flowchart of another method for determining the frequency domain position of the control resource set provided by the embodiments of the present application. Figure 12 The method shown includes steps 1201 to 1203.

[0237] 1201. Before the terminal device successfully initializes access, the network device sends the configuration information of the first control resource set to the terminal device.

[0238] Correspondingly, before the terminal device successfully initializes access, the terminal device receives the configuration information of the first control resource set.

[0239] 1202. Before the terminal device successfully initializes access, the network device sends the uplink and downlink scheduling control information on the downlink physical control channel according to the first common resource block set occupied by the first control resource set.

[0240] Correspondingly, before the terminal device successfully initializes access, the terminal device listens for the downlink physical control channel according to the first common resource block set occupied by the first control resource set to obtain the uplink and downlink scheduling control information.

[0241]

[0241] After the terminal device successfully performs initial access, the network device sends uplink and downlink scheduling control information on the downlink physical control channel according to the third common resource block set occupied by the first control resource set.

[0242]

[0242] Correspondingly, after the terminal device successfully performs initial access, the terminal device listens to the downlink physical control channel to obtain uplink and downlink scheduling control information according to the third common resource block set occupied by the first control resource set.

[0243]

[0243] Among them, in step 1202, the first starting common resource block included in the first common resource block set is determined according to the second starting common resource block of the first downlink bandwidth part and the configuration information of the first control resource set, and the configuration information is used to indicate the position of the physical resource block occupied by the first control resource set within the first downlink bandwidth part. The first downlink bandwidth part here may be defined by CORESET #0.

[0244]

[0244] In step 1203, the third starting common resource block included in the third common resource block set is determined according to the fourth starting common resource block of the second downlink bandwidth part and the configuration information of the first control resource set, and the configuration information is used to indicate the position of the physical resource block occupied by the first control resource set within the second downlink bandwidth part. The second downlink bandwidth part here may be configured by SIB 1.

[0245] In Figure 12 Figure 12 In the shown embodiment, the second starting common resource block of the first downlink bandwidth part is the same as the fourth starting common resource block of the second downlink bandwidth part. Although the downlink bandwidth parts referred to by the first control resource set are different before and after the terminal device successfully performs initial access, by setting the starting common resource blocks of these two downlink bandwidth parts to be the same, it is still possible to make the first starting common resource block of the first control resource set determined according to the first downlink bandwidth part the same as the third starting common resource block of the second control resource set determined according to the second downlink bandwidth part.

[0246]

[0246] The identifier of the first control resource set of this application is not 0.

[0247]

[0247] Optionally, the configuration information of the first control resource set can be obtained from SIB 1, and this configuration information can take effect before or after the terminal device successfully performs initial access. Here, taking effect means that: the terminal device can listen to the downlink physical control channel according to the frequency domain position of the first control resource set to obtain uplink and downlink scheduling control information; or, the network device can send uplink and downlink scheduling control information on the downlink physical control channel according to the frequency domain position of the first control resource set.

[0248] Optionally, in a scenario where the first downlink bandwidth part is the initial DL BWP configured by SIB 1, the configuration information of the first downlink bandwidth part can also be obtained from SIB 1. However, the configuration information of the first downlink bandwidth part configured by SIB 1 becomes effective after the terminal device successfully initializes the access. Here, the effectiveness means that the terminal device can determine the frequency-domain position of the first downlink bandwidth part using a high-layer signaling locationAndBandwidth and / or other parameters of the first downlink bandwidth part, and can receive downlink control information based on the frequency-domain position of the first downlink bandwidth part configured by SIB 1, or the network device can send downlink control information based on the frequency-domain position of the first downlink bandwidth part configured by SIB 1.

[0249] Before the terminal device successfully initializes the access, the first common resource blocks occupied by the first control resource set include the first starting common resource block and other common resource blocks occupied by the first control resource set. After the terminal device successfully initializes the access, the third common resource blocks occupied by the first control resource set include the third starting common resource block and other common resource blocks occupied by the first control resource set. In the embodiments of the present application, both the network device and the terminal device can determine the first starting common resource block and the third starting common resource block, and can determine the common resource blocks starting from the first starting common resource block occupied by the first control resource set according to the configuration information and the starting common resource block of the referenced downlink bandwidth part, and can determine the common resource blocks starting from the third starting common resource block occupied by the first control resource set according to the configuration information and the starting common resource block of the referenced downlink bandwidth part. For how to determine the first starting common resource block and the third starting common resource block, refer to Figure 13 the detailed introduction.

[0250] Please refer to Figure 13 , which provides another example diagram of the frequency-domain position of the control resource set for the embodiments of the present application. In Figure 13 , the first downlink bandwidth part is the initial DL BWP defined by CORESET#0, and the first starting common resource block of the first control resource set 1 is determined according to the second starting common resource block of CORESET#0 and the configuration information of the first control resource set. The second downlink bandwidth part is the initial DL BWP configured by SIB 1, and the third starting common resource block of the first control resource set 2 is determined according to the fourth starting common resource block of the initial DL BWP configured by SIB1 and the configuration information of the first control resource set. The second starting common resource block of the first downlink bandwidth part is the same as the fourth starting common resource block of the second downlink bandwidth part.

[0251] Specifically, after determining the second starting common resource block of CORESET#0, the detailed process of determining the first starting common resource block of the first control resource set 1 can be referred to Figure 6 for a detailed introduction. And after determining the fourth starting common resource block of the initial DL BWP configured by SIB1, the detailed process of determining the third starting common resource block of the first control resource set 2 can be referred to Figure 6 for a detailed introduction. Among them, the fourth offset refers to the number of common resource blocks by which the second starting common resource block of CORESET#0 differs from the first starting common resource block of the first control resource set.

[0252] Among them, the second starting common resource block of CORESET#0 refers to the smallest CRB occupied by CORESET#0; the first starting common resource block of the first control resource set refers to the smallest CRB occupied by the first control resource set. The second starting common resource block of CORESET#0 is determined according to the second starting physical resource block of CORESET#0 and the first offset. The first offset is used to indicate the number of physical resource blocks by which the second starting physical resource block differs from the reference point. The reference point is a common reference point of the resource block grid, and the reference point is used to indicate the center position of subcarrier 0 in the common resource block CRB 0 configured with a preset subcarrier spacing. As Figure 4 shown, the common reference point can be the position of reference point A (point A), which indicates the center position of subcarrier 0 in the common resource block CRB 0.

[0253] The first offset is determined according to the second offset between the second starting physical resource block of CORESET#0 and the third starting physical resource block of the SS / PBCH block and the common resource block offset of the SS / PBCH block. Among them, the second offset is used to indicate the number of physical resource blocks by which the second starting physical resource block differs from the third starting physical resource block of the SS / PBCH block; the common resource block offset of the SS / PBCH block is used to indicate the number of physical resource blocks by which the third starting physical resource block differs from the reference point, such as Figure 10 the offset relative to reference point A shown So the first offset is equal to the value obtained by subtracting the second offset.

[0254] Here only a simple introduction to the determination method of the second starting common resource block of CORESET#0 is given. For further details, please refer to Figure 8 for a detailed description.

[0255] Among them, when the second downlink bandwidth part is configured according to SIB 1, the second downlink bandwidth part ( Figure 13The fourth starting common resource block of the initial DL BWP configured in SIB1 is determined according to the fourth starting physical resource block of the second downlink bandwidth part and a third offset; wherein, the third offset is used to indicate the number of physical resource blocks by which the fourth starting physical resource block differs from a reference point, and the reference point is Figure 13 the position of reference point A (point A) in Figure 8 Here, only a simple introduction to the determination method of the fourth starting common resource block of the second downlink bandwidth part configured in SIB 1 is provided. For a detailed introduction, please refer to

[0256] For a terminal device, before the terminal device successfully initializes access, it can obtain the configuration information of the first control resource set in the SIB 1 message. For a network device, before the terminal device successfully initializes access, it can carry the configuration information of the first control resource set in the SIB1 message. The terminal device and the network device can determine the first starting common resource position of the first control resource set 1 according to the second starting common resource block of CORESET#0, and can determine the third starting common resource position of the first control resource set 2 according to the fourth starting common resource block of the initial DL BWP configured in SIB 1.

[0257] Before the terminal device successfully initializes access, the terminal device listens for the downlink physical control channel according to Figure 13 the first control resource set 1 shown in Figure 13 to obtain the uplink and downlink scheduling control information, and the network device sends the uplink and downlink scheduling control information on the downlink physical control channel according to Figure 13 the first control resource set 1 shown in Figure 13 After the terminal device successfully initializes access, the terminal device listens for the downlink physical control channel according to

[0258] the first control resource set 2 shown in

[0259] to obtain the uplink and downlink scheduling control information, and the network device sends the uplink and downlink scheduling control information on the downlink physical control channel according to Figure 12 and Figure 13The middle time T represents the time when the terminal device successfully initializes access. The network device and the terminal device may have different identifications of the time T. In an optional implementation manner, for the terminal device, the time when the terminal device determines successful initial access is used to indicate one of the following times (13-1), (13-2), (13-3), (13-4), (13-5), (13-6), (13-7), (13-8), (13-9), (13-10):

[0260] (13-1) The time when the terminal device successfully receives the initial transmission of Message 4 and sends an acknowledgment message to the network device;

[0261] (13-2) After the terminal device successfully receives the initial transmission of Message 4, the time when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identifier C-RNTI;

[0262] (13-3) The time when the terminal device successfully receives the retransmission of Message 4 and sends an acknowledgment message to the network device;

[0263] (13-4) After the terminal device successfully receives the retransmission of Message 4, the time when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identifier C-RNTI;

[0264] (13-5) When the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the terminal device successfully receives the initial transmission of Message 4 and sends an acknowledgment message to the network device, the time when the handover from the first downlink bandwidth part to the second downlink bandwidth part is completed;

[0265] (13-6) When the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the terminal device successfully receives the retransmission of Message 4 and sends an acknowledgment message to the network device, the time when the handover from the first downlink bandwidth part to the second downlink bandwidth part is completed;

[0266] (13-7) When the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the terminal device successfully receives the initial transmission of Message 4 and hands over from the first downlink bandwidth part to the second downlink bandwidth part, the time when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identifier C-RNTI;

[0267] When the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, the moment when the terminal device successfully receives the retransmitted Message 4 and then switches from the first downlink bandwidth part to the second downlink bandwidth part, and then the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identity C-RNTI;

[0268] When the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, the moment when the terminal device successfully receives the initial transmission of Message 4 and then switches from the first downlink bandwidth part to the second downlink bandwidth part, and then the terminal device successfully receives the configuration information of the DCI used to indicate that blind detection of the DCI scrambled by C-RNTI is required;

[0269] When the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, the moment when the terminal device successfully receives the initial transmission of Message 4 and then switches from the first downlink bandwidth part to the second downlink bandwidth part, and then the terminal device successfully receives the configuration information of the DCI used to indicate that blind detection of the DCI scrambled by C-RNTI is required.

[0270] For the network device, the moment when the network device determines the successful initial access is used to indicate one of the following moments in (13-11), (13-12), (13-13), (13-14):

[0271] (13-11) The moment when the network device receives the acknowledgment message sent by the terminal device for the initial transmission Message 4 sent by the network device;

[0272] (13-12) The moment when the network device receives the acknowledgment message sent by the terminal device for the retransmitted Message 4 sent by the network device;

[0273] (13-13) After the network device receives the acknowledgment message sent by the terminal device for the initial transmission Message 4 sent by the network device, the moment when the network device sends the configuration information of the DCI used to indicate that blind detection of the DCI scrambled by C-RNTI is required to the terminal device;

[0274] (13-14) After the network device receives the acknowledgment message sent by the terminal device for the retransmitted Message 4 sent by the network device, the moment when the network device sends the configuration information of the DCI used to indicate that blind detection of the DCI scrambled by C-RNTI is required to the terminal device;

[0275] (13-15) When the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the network device receives the acknowledgment message sent by the terminal device for the initial transmission Message 4 sent by the network device, the moment when the handover from the first downlink bandwidth part to the second downlink bandwidth part is completed;

[0276] (13-16) When the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the network device receives the acknowledgment message sent by the terminal device for the retransmission message 4 sent by the network device, the completion time of the handover from the first downlink bandwidth part to the second downlink bandwidth part;

[0277] (13-17) When the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the network device receives the acknowledgment message sent by the terminal device for the initial transmission message 4 sent by the network device and hands over from the first downlink bandwidth part to the second downlink bandwidth part, the time when the network device sends the configuration information of the DCI indicating that blind detection of C-RNTI scrambling is required to the terminal device;

[0278] (13-18) When the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different, after the network device receives the acknowledgment message sent by the terminal device for the retransmission message 4 sent by the network device and hands over from the first downlink bandwidth part to the second downlink bandwidth part, the time when the network device sends the configuration information of the DCI indicating that blind detection of C-RNTI scrambling is required to the terminal device.

[0279] In the embodiments of the present application, before and after the terminal device successfully initializes access, the frequency domain position of the first control resource set can be determined according to the frequency domain positions of different downlink bandwidth parts. However, since the starting common resource block positions of different downlink bandwidth parts are set to be the same, it is still possible to make the frequency domain positions of the first control resource set with different downlink bandwidth parts as references the same. In this way, the terminal device and the network device only need to calculate the frequency domain position of the first control resource set once, reducing the complexity of determining the frequency domain position of the first control resource set.

[0280] Based on Figure 1 the communication system shown, please refer to Figure 14 , which is a schematic flowchart of another method for determining the frequency domain position of a control resource set provided by the embodiments of the present application. Figure 14 The method shown includes step 1401 and step 1402.

[0281] 1401. After the terminal device successfully initializes access, the network device sends the configuration information of the first control resource set to the terminal device.

[0282] Correspondingly, after the terminal device successfully initializes access, the terminal device receives the configuration information of the first control resource set.

[0283] 1402. After the initial access of the terminal device is successful, the network device sends uplink and downlink scheduling control information on the downlink physical control channel according to the first common resource block set occupied by the first control resource set.

[0284] Correspondingly, after the initial access of the terminal device is successful, the terminal device listens to the downlink physical control channel to obtain uplink and downlink scheduling control information according to the first common resource block set occupied by the first control resource set.

[0285] Among them, the configuration information is used to indicate the position of the physical resource blocks occupied by the first control resource set within the first downlink bandwidth part. The identifier of the first control resource set in this application is not 0.

[0286] Among them, before the initial access of the terminal device is successful, the configuration information of the first control resource set will not be configured. After the initial access of the terminal device is successful, the configuration information of the first control resource set will be configured. After the initial access of the terminal device is successful, the terminal device can listen to the downlink physical control channel according to the common resource block set occupied by the first control resource set. Moreover, the frequency domain position of the first control resource set is determined with reference to a downlink bandwidth part. For specific details, please refer to Figure 15 the specific introduction.

[0287] Optionally, the configuration information of the first control resource set can be obtained from SIB1 after the initial access of the terminal device is successful, and this configuration information can take effect after the initial access of the terminal device is successful. Here, taking effect means that the terminal device can listen to the downlink physical control channel according to the frequency domain position of the first control resource set to obtain uplink and downlink scheduling control information; or the network device can send uplink and downlink scheduling control information on the downlink physical control channel according to the frequency domain position of the first control resource set.

[0288] Or, optionally, the configuration information of the first control resource set can be configured from other messages that configure the downlink bandwidth part after the initial access of the terminal device is successful. Figure 14 The embodiments shown do not limit this.

[0289] Further, optionally, Figure 14In the embodiment shown, the configuration information of the first control resource set and the configuration information of the first downlink bandwidth part are received simultaneously. The configuration information of the first control resource set is included in the configuration information of the first downlink bandwidth part. The determination of the frequency domain position of the first control resource set is based on the first downlink bandwidth that includes the configuration information of the first control resource set as a reference. That is to say, after the terminal device successfully initializes the access, the configuration information of the first control resource set and the configuration information of the first downlink bandwidth part can be obtained simultaneously in a configuration message. The frequency domain position of the first control resource set is determined according to the configuration information of the first downlink bandwidth part and the first control resource set.

[0290] The first common resource block occupied by the first control resource set includes the first starting common resource block and other common resource blocks occupied by the first control resource set. In the embodiments of the present application, both the network device and the terminal device can determine the first starting common resource block, and can determine the common resource blocks starting from the first starting common resource block occupied by the first control resource set according to the configuration information and the starting common resource block of the referenced downlink bandwidth part. For how to determine the first starting common resource block, please refer to Figure 15 for the specific introduction.

[0291] Please refer to Figure 15 , which provides another example diagram of the frequency domain position of the control resource set for the embodiments of the present application. In Figure 15 , the first downlink bandwidth part is configured by SIB 1 or other configuration messages. The first starting common resource block of the first control resource set is determined according to the second starting common resource block of the first downlink bandwidth part and the configuration information of the first control resource set. Specifically, after determining the second starting common resource block of the first downlink bandwidth part, the detailed process of determining the first starting common resource block can be found in Figure 6 for the detailed introduction, where the fifth offset refers to the number of common resource blocks by which the second starting common resource block of the first downlink bandwidth part configured by SIB 1 or other configuration messages differs from the first starting common resource block of the first control resource set.

[0292] Among them, the second starting common resource block of the first downlink bandwidth part is determined according to the second starting physical resource block of the first downlink bandwidth part and the third offset; where the third offset is used to indicate the number of physical resource blocks by which the second starting physical resource block differs from the reference point, and the reference point is a common reference point of the resource block grid, and the reference point is used to indicate the center position of subcarrier 0 in the common resource block CRB 0 configured with a preset subcarrier spacing. As Figure 15As shown, the common reference point may be the position of reference point A (point A), which indicates the center position of subcarrier 0 in common resource block CRB 0. Here, only the determination method of the second starting common resource block of the first downlink bandwidth part is briefly introduced. For a detailed introduction, please refer to Figure 8 for a detailed description.

[0293] Optionally, in actual applications, there may be only one way to configure the first downlink bandwidth part. Or, optionally, in actual applications, the first downlink bandwidth part can be configured through CORESET#0 and other configuration messages. In this case, the first downlink bandwidth part configured after the terminal device's initial access is successfully selected to determine the frequency domain position of the first control resource set.

[0294] For the terminal device, after the terminal device's initial access is successful, the configuration information of the first control resource set can be obtained in the configuration message. For the network device, after the terminal device's initial access is successful, the configuration information of the first control resource set can be carried in the configuration message. The terminal device and the network device can determine the first starting common resource position of the first control resource set according to the second starting common resource block of the first downlink bandwidth part in the configuration message. After the terminal device's initial access is successful, the terminal device listens for the downlink physical control channel according to Figure 15 the first control resource set shown to obtain the uplink and downlink scheduling control information, and the network device sends the uplink and downlink scheduling control information on the downlink physical control channel according to Figure 15 the first control resource set shown. The frequency domain position of the first control resource set determined by this method is the same. The terminal device and the network device only need to calculate the position of the first control resource set once, reducing the complexity of determining the frequency domain position of the first control resource set.

[0295] Among them, Figure 14 and Figure 15 the moment T represents the moment when the terminal device's initial access is successful. The network device and the terminal device may have different identifications of the moment T. In an optional implementation manner, for the terminal device, the moment when the terminal device determines the successful initial access is used to indicate one of the following moments (15-1), (15-2), (15-3), (15-4), (15-5), (15-6):

[0296] (15-1) The moment when the terminal device successfully receives the initial transmission of message 4 and sends an acknowledgment message to the network device;

[0297] (15-2) After the terminal device successfully receives the initial transmission of message 4, the moment when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identity C-RNTI;

[0298] The moment when the terminal device successfully receives the retransmitted Message 4 and sends an acknowledgement message to the network device;

[0299] (15-4) The moment when, after the terminal device successfully receives the retransmitted Message 4, the terminal device successfully receives downlink control information (DCI) scrambled by a cell radio network temporary identifier (C-RNTI);

[0300] (15-5) The moment when, after the terminal device successfully receives the initially transmitted Message 4, the terminal device successfully receives configuration information for indicating DCI scrambled by C-RNTI that needs to be blindly detected;

[0301] (15-6) The moment when, after the terminal device successfully receives the retransmitted Message 4, the terminal device successfully receives configuration information for indicating DCI scrambled by C-RNTI that needs to be blindly detected.

[0302] For the network device, the moment when the network device determines that the initial access is successful is used to indicate one of the following (15-7), (15-8), (15-9), and (15-10):

[0303] (15-7) The moment when the network device receives an acknowledgement message sent by the terminal device for the initially transmitted Message 4 sent by the network device;

[0304] (15-8) The moment when the network device receives an acknowledgement message sent by the terminal device for the retransmitted Message 4 sent by the network device;

[0305] (15-9) The moment when, after the network device receives an acknowledgement message sent by the terminal device for the initially transmitted Message 4 sent by the network device, the network device sends configuration information for indicating DCI scrambled by C-RNTI that needs to be blindly detected to the terminal device;

[0306] (15-10) The moment when, after the network device receives an acknowledgement message sent by the terminal device for the retransmitted Message 4 sent by the network device, the network device sends configuration information for indicating DCI scrambled by C-RNTI that needs to be blindly detected to the terminal device.

[0307] In the embodiments of the present application, before the terminal device's initial access is successful, the network device does not send uplink and downlink scheduling control information on the downlink physical control channel according to the set of common resource blocks occupied by the first control resource set, and the terminal device does not listen for the downlink physical control channel according to the frequency domain position of the first control resource set. Thus, before the terminal device's initial access is successful, neither the network device nor the terminal device needs to determine the frequency domain position of the first control resource set. After the terminal device's initial access, the frequency domain position of the first control resource set is determined based on the referenced downlink bandwidth part. In this way, the terminal device and the network device only need to calculate the frequency domain position of the first control resource set once, reducing the complexity of determining the frequency domain position of the first control resource set.

[0308] Regarding Figures 3 to 15 the method embodiments shown, it should be noted that in actual applications, in the first possible implementation, the time when the network device configures the first control resource set is not restricted. That is to say, the configuration message of the first control resource set can be configured before the terminal device's initial access is successful, or can be configured after the terminal device's initial access is successful. In this scenario, it can include Figures 3 to 15 the various implementable solutions described.

[0309] For example, since the time when the network device configures the first control resource set is uncertain, the terminal device can listen to the channel before initial access to obtain the configuration information of the first control resource set; in the case where the terminal device obtains the configuration information of the first control resource set or does not obtain the configuration information of the first control resource set, the terminal device can listen to the channel after initial access to obtain the configuration information of the first control resource set.

[0310] Based on the first possible implementation, further, the time when the downlink bandwidth part referred to for configuring the first control resource set can be unrestricted. In this scenario, if the network device configures a new downlink bandwidth part, in the case where the terminal device receives the configuration information of the new downlink bandwidth part, the position of the first control resource set can be determined with reference to the frequency domain position of the new downlink bandwidth part.

[0311] In the second possible implementation, the time when the network device configures the first control resource set can be restricted. For example, it is restricted that the configuration message of the first control resource set can be configured after the terminal device's initial access is successful. In this scenario, the implementation solutions described in Figure 14 and Figure 15 can be referred to. For example, since the time when the network device configures the first control resource set is after the terminal device's initial access is successful, the terminal device does not need to listen to the channel before initial access, but after the terminal device's initial access is successful, the terminal device starts to listen to the channel to obtain the configuration information of the first control resource set. This can reduce the power consumption of the terminal device due to uncertain listening.

[0312] Based on the second possible implementation, further, the time when the downlink bandwidth part referred to for configuring the first control resource set can be restricted. In this scenario, if the configuration time of the downlink bandwidth part is restricted to be after the terminal device's initial access is successful, then once the network device configures a new downlink bandwidth part, in the case where the terminal device receives the configuration information of the new downlink bandwidth part, the position of the first control resource set can be determined with reference to the frequency domain position of the new downlink bandwidth part.

[0313] In another possible implementation, regardless of whether the first control resource set is configured before or after the terminal device successfully initializes access, and regardless of whether the initial DL BWP is configured in SIB 1, after the terminal device successfully initializes access, the network device configures at least one of the first control resource set, the newly configured initial DL BWP, or other DL BWPs (non-initial DL BWP or BWP with BWP_ID not equal to 0) for the terminal device through higher layer signaling (such as RRC signaling):

[0314] If the configuration of the first control resource set is in the newly configured initial DL BWP, the frequency domain position of the first control resource set is referenced by CORESET#0 or by the newly configured initial DL BWP. That is, in Figures 3 - 15 the illustrated embodiment, after the terminal device successfully initializes access, if the network device configures the newly configured initial DL BWP for the terminal device through higher layer signaling (such as RRC signaling) and the subcarrier spacing of the newly configured initial DL BWP is the same as that of the initial DL BWP configured in SIB1, the frequency domain position of the first control resource set is referenced by CORESET#0 or by the newly configured initial DL BWP.

[0315] If the initial DL BWP is configured in SIB 1 before the terminal device successfully initializes access and the configuration of the first control resource set is in other DL BWPs, it includes the following two cases (1) and (2):

[0316] (1) If the frequency domain position of the other DL BWP includes the frequency domain position of CORESET#0 or includes the frequency domain position of the initial DL BWP configured in SIB 1 and the subcarrier spacing of the other DL BWP is the same as that of the initial DL BWP configured in SIB1, the frequency domain position of the first control resource set is referenced according to the downlink bandwidth part referenced before the successful initialization of access.

[0317] (2) If the frequency domain position of the other DL BWP does not include the frequency domain position of CORESET#0 or does not include the frequency domain position of the initial DL BWP configured in SIB 1 or the frequency domain position of the other DL BWP includes the frequency domain position of CORESET#0 or includes the frequency domain position of the initial DL BWP configured in SIB 1 and the subcarrier spacing of the other DL BWP is different from that of the initial DL BWP configured in SIB1, the other DL BWP is used as the reference.

[0318] Another thing to note is that when the terminal device successfully receives the message sent by the network device, it feedbacks 1 bit of message to perform positive / acknowledgment (ACK) or negative (Negative Acknowledgment, NACK) on the received message. The network device decides whether to send new data or retransmit according to whether the feedback from the terminal device is an ACK (bit value 1) or a NACK message (bit value 0). In the embodiments of this application, the moment of sending a certain message can be the moment of starting to send this message or the moment of confirming the completion of sending this message. This application does not make any limitations in this regard. For example, Figures 3 - 15 In the embodiments, the moment of designing to send the confirmation message can refer to the moment of sending the confirmation message or the moment of confirming the completion of sending this confirmation message.

[0319] Another thing to note is that if the first control resource set is configured in SIB 1, the frequency-domain resource position of the first control resource set is restricted within the frequency-domain resource range of CORESET#0, that is, less than or equal to the frequency-domain resource size of CORESET#0. If the first control resource set is not configured in SIB 1 but in other higher-layer signaling (such as RRC signaling), the frequency-domain resource position of the first control resource set can be within the frequency-domain resource range of CORESET#0 or not within the frequency-domain resource range of CORESET#0.

[0320] If the high-layer parameter of the search space for the random access channel is configured in the first downlink bandwidth part, after the initial access is successful, the network device configures the frequency-domain resource range of other downlink bandwidth parts for the terminal device through high-layer signaling (such as RRC signaling), including the frequency-domain resource range of the first downlink bandwidth part, and when the subcarrier spacing of other downlink bandwidth parts is the same as that of the first downlink bandwidth part, if the high-layer parameter of the search space for the random access channel is not configured in the currently active downlink bandwidth part, the network device can configure, through high-layer signaling (such as RRC signaling), for the terminal device in other downlink bandwidth parts to listen for the corresponding downlink control information in the search space for the random access channel configured in the first downlink bandwidth part, such as the downlink control information scrambled by RA-RNTI. The identifier of the currently active downlink bandwidth part takes a non-zero value. In this process, the terminal device does not need to change the radio frequency bandwidth or switch the carrier center frequency.

[0321] The above mainly introduced the solution provided by the embodiments of the present application from the perspective of devices. It can be understood that in order for the terminal device and the network device to implement the above functions, they include the corresponding hardware structures and / or software modules for executing each function. Combining the steps of each example described in the embodiments disclosed in the present application, the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different devices for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the technical solution of the embodiments of the present application.

[0322] The embodiments of the present application can divide the terminal device and the network device into functional modules or functional units according to the above device examples. For example, each functional module or functional unit can be divided corresponding to each function, or two or more functions can be integrated into one processing module or processing unit. The above integrated module or unit can be implemented in the form of hardware or in the form of a software functional module. It should be noted that the division of modules or units in the embodiments of the present application is illustrative, only a logical function division, and there may be other division methods in actual implementation.

[0323] Please refer to Figure 16 , Figure 16 which is a schematic structural diagram of a terminal device provided by the embodiments of the present application. This terminal device is used to implement Figures 3 to 15 the device embodiment of. As Figure 16 shown, the terminal device 1600 includes a transceiver module 1601 and a processing module 1602.

[0324] In the first possible implementation solution, the transceiver module 1601 and the processing module 1602 are used to implement Figures 3 to 5 the content of the embodiment shown. Among them:

[0325] The transceiver module 1601 is used to receive the configuration information of the first control resource set before the terminal device successfully initializes the access;

[0326] The processing module 1602 is used to listen to the downlink physical control channel to obtain the uplink and downlink scheduling control information according to the first common resource block set occupied by the first control resource set before the terminal device successfully initializes the access or after the terminal device successfully initializes the access;

[0327] The first starting common resource block included in the first common resource block set is determined according to the second starting common resource block of the first downlink bandwidth part and the configuration information of the first control resource set, where the configuration information is used to indicate the positions of the physical resource blocks occupied by the first control resource set within the first downlink bandwidth part.

[0328] In a second possible implementation, the transceiver module 1601 and the processing module 1602 are used to implement Figures 9 to 11 the content of the illustrated embodiment. Wherein:

[0329] The transceiver module 1601 is configured to receive the configuration information of the first control resource set before the terminal device successfully initializes access;

[0330] The processing module 1602 is configured to not monitor the downlink physical control channel according to the common resource block set occupied by the first control resource set before the terminal device successfully initializes access;

[0331] The processing module 1602 is further configured to, after the terminal device successfully initializes access, monitor the downlink physical control channel according to the first common resource block set occupied by the first control resource set to obtain the uplink and downlink scheduling control information;

[0332] The first starting common resource block included in the first common resource block set is determined according to the second starting common resource block of the first downlink bandwidth part and the configuration information of the first control resource set, where the configuration information is used to indicate the positions of the physical resource blocks occupied by the first control resource set within the first downlink bandwidth part.

[0333] In a third possible implementation, the transceiver module 1601 and the processing module 1602 are used to implement Figures 12 to 13 the content of the illustrated embodiment. Wherein:

[0334] The transceiver module 1601 is configured to receive the configuration information of the first control resource set before the terminal device successfully initializes access;

[0335] The processing module 1602 is configured to, before the terminal device successfully initializes access, monitor the downlink physical control channel according to the first common resource block set occupied by the first control resource set to obtain the uplink and downlink scheduling control information; the first starting common resource block included in the first common resource block set is determined according to the second starting common resource block of the first downlink bandwidth part and the configuration information of the first control resource set, where the configuration information is used to indicate the positions of the physical resource blocks occupied by the first control resource set within the first downlink bandwidth part;

[0336] The processing module 1602 is further configured to, after the initial access of the terminal device is successful, monitor a downlink physical control channel to obtain uplink and downlink scheduling control information according to a third common resource block set occupied by the first control resource set; the third starting common resource block included in the third common resource block set is determined according to a fourth starting common resource block of a second downlink bandwidth part and configuration information of the first control resource set, and the configuration information is used to indicate a position of a physical resource block occupied by the first control resource set within the second downlink bandwidth part.

[0337] The second starting common resource block of the first downlink bandwidth part is the same as the fourth starting common resource block of the second downlink bandwidth part.

[0338] In a fourth possible implementation solution, the transceiver module 1601 and the processing module 1602 are configured to implement Figures 14 to 15 the content of the illustrated embodiment. Wherein:

[0339] The transceiver module 1601 is configured to, after the initial access of the terminal device is successful, receive configuration information of a first control resource set.

[0340] The processing module 1602 is configured to, after the initial access of the terminal device is successful, monitor a downlink physical control channel to obtain uplink and downlink scheduling control information according to a first common resource block set occupied by the first control resource set.

[0341] The first starting common resource block included in the first common resource block set is determined according to a second starting common resource block of a first downlink bandwidth part and configuration information of the first control resource set, and the configuration information is used to indicate a position of a physical resource block occupied by the first control resource set within the first downlink bandwidth part.

[0342] It can be understood that the terminal device 1600 is configured to implement Figures 3 to 15 the steps performed by the terminal device in the embodiment. Regarding Figure 16 the specific implementation manners and corresponding beneficial effects of the functional blocks included in the terminal device, reference may be made to the specific introduction of the foregoing Figures 3 to 15 embodiment, which will not be elaborated here.

[0343] In an embodiment of the present application, the transceiver module may be a receiver or a receiving circuit. The transceiver module may also be a communication interface of the terminal device. The processing module may be a processor.

[0344] The above Figure 16 illustrated terminal device 1600 in the embodiment may be implemented by Figure 17 the illustrated terminal device 1160. As Figure 17As shown, the embodiment of the present application provides another structural schematic diagram of a terminal device. Figure 17 The terminal device 1160 shown includes: a processor 1701 and a transceiver 1702.

[0345] The transceiver 1702 is used to support information transmission between the terminal device 1160 and other terminal devices or other devices involved in the above embodiments.

[0346] The processor 1701 is used to control and manage the actions of the terminal device.

[0347] For example, in Figure 3 the embodiment shown, the transceiver 1702 is used to implement Figure 3 receiving the messages in steps 301, 302, and 303 in the embodiment shown; the processing unit 1701 is used to support the transceiver 1702 to execute the above steps.

[0348] For example, in Figure 9 the embodiment shown, the transceiver 1702 is used to implement Figure 9 receiving the messages in steps 901 and 902 in the embodiment shown; the processing unit 1701 is used to support the transceiver 1702 to execute the above steps.

[0349] For example, in Figure 12 the embodiment shown, the transceiver 1702 is used to implement Figure 12 receiving the messages in steps 1201, 1202, and 1203 in the embodiment shown; the processing unit 1701 is used to support the transceiver 1702 to execute the above steps.

[0350] For example, in Figure 14 the embodiment shown, the transceiver 1702 is used to implement Figure 14 receiving the messages in steps 1401 and 1402 in the embodiment shown; the processing unit 1701 is used to support the transceiver 1702 to execute the above steps.

[0351] The processor 1701 and the transceiver 1702 are communicatively connected, for example, connected by a bus 1704. The bus 1704 can be a PCI bus or an EISA bus, etc. The bus 1704 can be divided into an address bus, a data bus, and a control bus, etc. For the sake of simplicity of representation, Figure 17 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0352] The terminal device 1160 may further include a memory 1703. The memory 1703 is used to store program codes and data for the terminal device 1160 to execute, and the processor 1701 is used to execute the application program codes stored in the memory 1703 to implement Figures 3 to 15The actions of the terminal device provided by any of the embodiments shown.

[0353] It should be noted that in practical applications, the terminal device may include one or more processors, and the structure of the terminal device 1160 does not constitute a limitation on the embodiments of the present application.

[0354] The processor 1701 may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in connection with the disclosure of the present application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on.

[0355] The transceiver 1704 may be a communication interface or a transceiver circuit, etc. Among them, the transceiver is a general term. In specific implementations, the transceiver may include multiple interfaces.

[0356] The memory 1703 may include volatile memory, such as random access memory (RAM); the memory 1703 may also include non-volatile memory, such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid-state drive (SSD); the memory 1703 may further include a combination of the above types of memory.

[0357] In the embodiments of the present application, a computer storage medium is also provided, which can be used to store Figure 17 The computer software instructions used by the terminal device in the embodiments shown, which include programs designed for the terminal device in the above embodiments. The storage medium includes, but is not limited to, flash memory, hard disk, and solid-state drive.

[0358] In the embodiments of the present application, a computer program product is also provided. When the computer product is run by a computing device, it can execute the above Figure 17The data processing device designed for the terminal device in the illustrated embodiment.

[0359] Please refer to Figure 18 , Figure 18 which is a schematic structural diagram of another network device provided by an embodiment of the present application. It is used to implement Figure 8 and Figure 9 the embodiments. As Figure 18 shown, the network device 1800 includes a transceiver module 1801 and a processing module 1802.

[0360] In a first possible implementation, the transceiver module and the processing module are used to implement Figures 3 to 5 the content of the illustrated embodiment.

[0361] The transceiver module 1801 is configured to send configuration information of a first control resource set to the terminal device before the terminal device successfully initializes the access;

[0362] The processing module 1802 is configured to broadcast uplink and downlink scheduling control information on a downlink physical control channel according to a first common resource block set occupied by the first control resource set before the terminal device successfully initializes the access or after the terminal device successfully initializes the access;

[0363] The first starting common resource block included in the first common resource block set is determined according to a second starting common resource block of a first downlink bandwidth part and the configuration information of the first control resource set, and the configuration information is used to indicate the position of the physical resource block occupied by the first control resource set within the first downlink bandwidth part.

[0364] In a second possible implementation, the transceiver module and the processing module are used to implement Figures 9 to 11 the content of the illustrated embodiment. Among them:

[0365] The transceiver module 1801 is configured to send configuration information of a first control resource set to the terminal device before the terminal device successfully initializes the access;

[0366] The processing module 1802 is configured not to broadcast uplink and downlink scheduling control information on a downlink physical control channel according to a common resource block set occupied by the first control resource set before the terminal device successfully initializes the access;

[0367] The processing module 1802 is further configured to broadcast uplink and downlink scheduling control information on a downlink physical control channel according to a first common resource block set occupied by the first control resource set after the terminal device successfully initializes the access;

[0368] The first starting common resource block included in the first set of common resource blocks is determined according to the second starting common resource block of the first downlink bandwidth part and the configuration information of the first control resource set, where the configuration information is used to indicate the positions of the physical resource blocks occupied by the first control resource set within the first downlink bandwidth part.

[0369] In a third possible implementation, the transceiver module and the processing module are used to implement Figures 12 to 13 the content of the illustrated embodiment. Wherein:

[0370] The transceiver module 1801 is configured to, before the terminal device successfully initializes access, the network device sends the configuration information of the first control resource set to the terminal device;

[0371] The processing module 1802 is configured to, before the terminal device successfully initializes access, broadcast uplink and downlink scheduling control information on the downlink physical control channel according to the first set of common resource blocks occupied by the first control resource set; the first starting common resource block included in the first set of common resource blocks is determined according to the second starting common resource block of the first downlink bandwidth part and the configuration information of the first control resource set, where the configuration information is used to indicate the positions of the physical resource blocks occupied by the first control resource set within the first downlink bandwidth part;

[0372] The processing module 1802 is further configured to, after the terminal device successfully initializes access, broadcast uplink and downlink scheduling control information on the downlink physical control channel according to the third set of common resource blocks occupied by the first control resource set; the third starting common resource block included in the third set of common resource blocks is determined according to the fourth starting common resource block of the second downlink bandwidth part and the configuration information of the first control resource set, where the configuration information is used to indicate the positions of the physical resource blocks occupied by the first control resource set within the second downlink bandwidth part;

[0373] The second starting common resource block of the first downlink bandwidth part is the same as the fourth starting common resource block of the second downlink bandwidth part.

[0374] In a fourth possible implementation, the transceiver module and the processing module are used to implement Figures 14 to 15 the content of the illustrated embodiment. Wherein:

[0375] The transceiver module 1801 is configured to, after the terminal device successfully initializes access, send the configuration information of the first control resource set to the terminal device;

[0376] A processing module 1802, configured to broadcast uplink and downlink scheduling control information on a downlink physical control channel according to a first set of common resource blocks occupied by the first control resource set after the terminal device successfully initializes access; the first starting common resource block included in the first set of common resource blocks is determined according to a second starting common resource block of a first downlink bandwidth part and configuration information of the first control resource set, and the configuration information is used to indicate a position of a physical resource block occupied by the first control resource set within the first downlink bandwidth part.

[0377] It can be understood that the network device 1800 is used to implement Figures 3 to 15 the steps performed by the network device in the embodiment. Regarding Figure 16 the specific implementation manners and corresponding beneficial effects of the functional blocks included in the network device, reference can be made to the specific introduction of the foregoing Figures 3 to 15 embodiment, which will not be elaborated here.

[0378] In the embodiment of the present application, the transceiver module may be a receiver or a receiving circuit. The transceiver module may also be a communication interface of the terminal device. The processing module may be a processor.

[0379] The above Figure 18 shown network device may be implemented by Figure 19 the shown network device 1900. As Figure 19 shown, a schematic structural diagram of another network device is provided in the embodiment of the present application, Figure 19 the shown network device 1900 includes: a processor 1901 and a transceiver 1902.

[0380] The transceiver 1902 is used to support information transmission between the network device 1900 and other devices involved in the foregoing embodiment, and the processor 1901 is used to control and manage the actions of the network device 1900.

[0381] For example, in Figure 3 the shown embodiment, the transceiver 1702 is used to implement Figure 3 the messages in the sending steps 301, 302, and 303 in the shown embodiment; the processing unit 1701 is used to support the transceiver 1702 to execute the above steps.

[0382] For example, in Figure 9 the shown embodiment, the transceiver 1702 is used to implement Figure 9 the messages in the sending steps 901 and 902 in the shown embodiment; the processing unit 1701 is used to support the transceiver 1702 to execute the above steps.

[0383] For example, in Figure 12 the shown embodiment, the transceiver 1702 is used to implement Figure 12In the illustrated embodiment, messages in sending steps 1201, 1202, and 1203 are sent; the processing unit 1701 is used to support the transceiver 1702 to execute the above steps.

[0384] For example, in Figure 14 the illustrated embodiment, the transceiver 1702 is used to implement Figure 14 In the illustrated embodiment, messages in sending steps 1401 and 1402 are sent; the processing unit 1701 is used to support the transceiver 1702 to execute the above steps.

[0385] The processor 1901 and the transceiver 1902 are communicatively connected, for example, connected by a bus. The network device 1900 may further include a memory 1903. The memory 1903 is used to store program codes and data for the network device 1900 to execute, and the processor 1901 is used to execute the application program codes stored in the memory 1903 to implement Figure 8 or Figure 9 the actions of the network device provided in any of the illustrated embodiments.

[0386] It should be noted that in practical applications, the network device may include one or more processors, and the structure of the network device 1900 does not constitute a limitation on the embodiments of the present application.

[0387] The processor 1901 may be a CPU, NP, a hardware chip, or any combination thereof. The above hardware chip may be an ASIC, a PLD, or a combination thereof. The above PLD may be a CPLD, an FPGA, a GAL, or any combination thereof.

[0388] The memory 1903 may include a volatile memory, such as a RAM; the memory 1903 may also include a non-volatile memory, such as a ROM, a flash memory, a hard disk, or a solid-state drive; the memory 1903 may further include a combination of the above types of memories.

[0389] In the embodiments of the present application, a computer storage medium is further provided, which can be used to store Figure 18 the computer software instructions used by the network device in the illustrated embodiment, which include the programs designed for the network device in the above embodiments. The storage medium includes, but is not limited to, a flash memory, a hard disk, and a solid-state drive.

[0390] In the embodiments of the present application, a computer program product is further provided. When the computer product is run by a computing device, it can execute the above Figure 18 data processing device designed for the network device in the illustrated embodiment.

[0391] In the description, claims and drawings of this application, terms such as "first", "second", "third" and "fourth" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include unlisted steps or units, or may optionally further include other steps or units inherent to these processes, methods, products or devices.

[0392] In this application, "A and / or B" refers to one of the following cases: A, B, A and B. "At least one of..." refers to any of the listed items or any combination of any number of the listed items. For example, "at least one of A, B and C" refers to one of the following cases: A, B, C, A and B, B and C, A and C, A, B and C.

[0393] Those of ordinary skill in the art can understand that in various embodiments of this application, the magnitudes of the serial numbers of the above processes do not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of this application.

[0394] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of this application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that the computer can access or a data storage device such as a server or data center that includes one or more integrated available media. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

[0395] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above methods. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM), etc.

Claims

1. A method for monitoring a control channel, characterized in that, the method comprises: before the terminal device successfully initializes access, receiving first configuration information, wherein the first configuration information indicates the positions of physical resource blocks occupied by a first control resource set within a first downlink bandwidth part, and the first downlink bandwidth part is configured by a system information block 1 (SIB 1); before the terminal device successfully initializes access, monitoring a downlink physical control channel in the first control resource set configured by the first configuration information to obtain uplink and downlink scheduling control information.

2. The method according to claim 1, characterized in that, the first downlink bandwidth part becomes effective after the terminal device successfully initializes access.

3. The method according to claim 2, characterized in that, before the terminal device successfully initializes access, the first downlink bandwidth part is not effective and a second downlink bandwidth part is effective, and the second downlink bandwidth part is an initial downlink bandwidth part defined by a control resource set #0 (CORESET#0).

4. The method according to claim 3, characterized in that, the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different.

5. The method according to claim 1, characterized in that, the method further comprises: after the terminal device successfully initializes access, monitoring a downlink physical control channel in the first control resource set configured by the first configuration information to obtain uplink and downlink scheduling control information.

6. The method according to claim 1, characterized in that, the starting common resource block of a first common resource block set occupied by the first control resource set is determined according to the starting common resource block of the first downlink bandwidth part and the configuration information of the first control resource set.

7. The method according to claim 6, characterized in that, the starting common resource block of the first downlink bandwidth part is determined according to the starting physical resource block of the first downlink bandwidth part and a third offset.

8. The method according to claim 7, characterized in that, the third offset is the number of physical resource blocks between the starting physical resource block of the first downlink bandwidth part and a reference point, and the reference point is a common reference point of a resource block grid, and the reference point is used to indicate the center position of subcarrier 0 in a common resource block (CRB 0) configured with a preset subcarrier spacing.

9. The method according to claim 1, characterized in that, the SIB1 includes the first configuration information and second configuration information, and the second configuration information is the configuration information of the first downlink bandwidth part.

10. The method according to any one of claims 1 to 9, characterized in that, the first control resource set is a common control resource set, and the identifier of the first control resource set is not 0.

11. The method according to any one of claims 1 to 9, characterized in that, the moment when the terminal device successfully initializes access is one of the following moments: the moment when the terminal device successfully receives the initial transmission of message 4 and sends an acknowledgement message to the network device; After the terminal device successfully receives the initially transmitted Message 4, the moment when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identity C-RNTI; The moment when the terminal device successfully receives the retransmitted Message 4 and sends an acknowledgment message to the network device; After the terminal device successfully receives the retransmitted Message 4, the moment when the terminal device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identity C-RNTI; After the terminal device successfully receives the initially transmitted Message 4, the moment when it successfully receives the configuration information indicating the DCI to be blindly detected scrambled by C-RNTI; After the terminal device successfully receives the retransmitted Message 4, the moment when it successfully receives the configuration information indicating the DCI to be blindly detected scrambled by C-RNTI.

12. The method according to any one of claims 1 to 9, characterized in that The uplink and downlink scheduling control information is control information for scheduling a random access response, control information for scheduling a paging message, or control information for scheduling a system message.

13. A method for transmitting a control channel, characterized in that The method includes: Before the terminal device's initial access is successful, send first configuration information to the terminal device, where the first configuration information indicates the position of the physical resource blocks occupied by a first control resource set within a first downlink bandwidth part, and the first downlink bandwidth part is configured by system information block 1 SIB 1; Before the terminal device's initial access is successful, on the downlink physical control channel in the first control resource set configured by the first configuration information, send uplink and downlink scheduling control information to the terminal device.

14. The method according to claim 13, characterized in that After the terminal device's initial access is successful, the first downlink bandwidth part becomes effective.

15. The method according to claim 14, characterized in that Before the terminal device's initial access is successful, the first downlink bandwidth part is not effective, and a second downlink bandwidth part is effective, where the second downlink bandwidth part is the initial downlink bandwidth part defined by control resource set #0 CORESET#0.

16. The method according to claim 15, characterized in that The common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different.

17. The method according to claim 13, characterized in that The method further includes: After the terminal device's initial access is successful, send uplink and downlink scheduling control information on the downlink physical control channel in the first control resource set configured by the first configuration information.

18. The method according to claim 13, characterized in that The starting common resource block of the first common resource block set occupied by the first control resource set is determined according to the starting common resource block of the first downlink bandwidth part and the configuration information of the first control resource set.

19. The method according to claim 18, characterized in that The starting common resource block of the first downlink bandwidth part is determined according to the starting physical resource block of the first downlink bandwidth part and a third offset.

20. The method according to claim 19, wherein, the third offset is the number of physical resource blocks between the starting physical resource block of the first downlink bandwidth part and a reference point, and the reference point is a common reference point of the resource block grid, and the reference point is used to indicate the center position of subcarrier 0 in common resource block CRB 0 configured with a preset subcarrier spacing.

21. The method according to claim 13, wherein, the SIB1 includes the first configuration information and the second configuration information, and the second configuration information is the configuration information of the first downlink bandwidth part.

22. The method according to any one of claims 13 to 21, wherein, the first control resource set is a common control resource set, and the identifier of the first control resource set is not 0.

23. The method according to any one of claims 13 to 21, wherein, the moment when the terminal device's initial access is successful is one of the following moments: the moment when the network device receives the acknowledgement message sent by the terminal device for the initial transmission message 4 sent by the network device; the moment when the network device receives the acknowledgement message sent by the terminal device for the retransmission message 4 sent by the network device; the moment when, after the network device receives the acknowledgement message sent by the terminal device for the initial transmission message 4 sent by the network device, the network device sends the configuration information of the DCI for indicating that blind detection of C-RNTI scrambling is required to the terminal device; the moment when, after the network device receives the acknowledgement message sent by the terminal device for the retransmission message 4 sent by the network device, the network device sends the configuration information of the DCI for indicating that blind detection of C-RNTI scrambling is required to the terminal device.

24. The method according to any one of claims 13 to 21, wherein, the uplink and downlink scheduling control information is the control information for scheduling the random access response, the control information for scheduling the paging message, or the control information for scheduling the system message.

25. An apparatus, wherein, comprises: a transceiver module, configured to receive first configuration information before the initial access of the apparatus is successful, where the first configuration information indicates the positions of the physical resource blocks occupied by a first control resource set within a first downlink bandwidth part, and the first downlink bandwidth part is configured by system information block 1 SIB 1; a processing module, configured to, before the initial access of the apparatus is successful, listen for a downlink physical control channel in the first control resource set configured by the first configuration information to obtain uplink and downlink scheduling control information.

26. The apparatus according to claim 25, wherein, after the initial access of the apparatus is successful, the first downlink bandwidth part becomes effective.

27. The apparatus according to claim 26, wherein, Before the device is successfully initially accessed, the first downlink bandwidth part is not effective, and the second downlink bandwidth part is effective. The second downlink bandwidth part is the initial downlink bandwidth part defined by the control resource set #0 CORESET #0.

28. The device according to claim 27, wherein, the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different.

29. The device according to claim 25, wherein, the processing module is further configured to, after the device is successfully initially accessed, listen for a downlink physical control channel in the first control resource set configured by the first configuration information to obtain uplink and downlink scheduling control information.

30. The device according to claim 25, wherein, the starting common resource block of the first common resource block set occupied by the first control resource set is determined according to the starting common resource block of the first downlink bandwidth part and the configuration information of the first control resource set.

31. The device according to claim 30, wherein, the starting common resource block of the first downlink bandwidth part is determined according to the starting physical resource block of the first downlink bandwidth part and a third offset.

32. The device according to claim 31, wherein, the third offset is the number of physical resource blocks between the starting physical resource block of the first downlink bandwidth part and a reference point. The reference point is a common reference point of the resource block grid, and the reference point is used to indicate the center position of subcarrier 0 in the common resource block CRB 0 configured with a preset subcarrier spacing.

33. The device according to claim 25, wherein, the SIB1 includes the first configuration information and the second configuration information, and the second configuration information is the configuration information of the first downlink bandwidth part.

34. The device according to any one of claims 25 to 33, wherein, the first control resource set is a common control resource set, and the identifier of the first control resource set is not 0.

35. The device according to any one of claims 25 to 33, wherein, the moment when the device is successfully initially accessed is one of the following moments: the moment when the device successfully receives the initial transmission of message 4 and sends an acknowledgment message to the network device; after the device successfully receives the initial transmission of message 4, the moment when the device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identifier C-RNTI; the moment when the device successfully receives the retransmission of message 4 and sends an acknowledgment message to the network device; after the device successfully receives the retransmission of message 4, the moment when the device successfully receives the downlink control information DCI scrambled by the cell radio network temporary identifier C-RNTI; after the device successfully receives the initial transmission of message 4, the moment when the device successfully receives the configuration information for indicating the DCI scrambled by C-RNTI that needs to be blindly detected; after the device successfully receives the retransmission of message 4, the moment when the device successfully receives the configuration information for indicating the DCI scrambled by C-RNTI that needs to be blindly detected.

36. The device according to any one of claims 25 to 33, wherein, the uplink and downlink scheduling control information is control information for scheduling a random access response, control information for scheduling a paging message, or control information for scheduling a system message.

37. A device, wherein, comprising: a transceiver module, configured to send first configuration information before the terminal device successfully initializes access, the first configuration information indicating the position of physical resource blocks occupied by a first control resource set within a first downlink bandwidth part, the first downlink bandwidth part being configured by a system information block 1 (SIB 1); the transceiver module is further configured to send uplink and downlink scheduling control information on a downlink physical control channel in the first control resource set configured by the first configuration information before the terminal device successfully initializes access.

38. The device according to claim 37, wherein, after the terminal device successfully initializes access, the first downlink bandwidth part becomes effective.

39. The device according to claim 38, wherein, before the terminal device successfully initializes access, the first downlink bandwidth part is not effective, and a second downlink bandwidth part is effective, the second downlink bandwidth part being an initial downlink bandwidth part defined by a control resource set #0 (CORESET #0).

40. The device according to claim 39, wherein, the common resource blocks occupied by the first downlink bandwidth part and the second downlink bandwidth part are different.

41. The device according to claim 37, wherein, the transceiver module is further configured to send uplink and downlink scheduling control information on a downlink physical control channel in the first control resource set configured by the first configuration information after the terminal device successfully initializes access.

42. The device according to claim 37, wherein, the starting common resource block of a first set of common resource blocks occupied by the first control resource set is determined according to the starting common resource block of the first downlink bandwidth part and the configuration information of the first control resource set.

43. The device according to claim 42, wherein, the starting common resource block of the first downlink bandwidth part is determined according to the starting physical resource block of the first downlink bandwidth part and a third offset.

44. The device according to claim 43, wherein, the third offset is the number of physical resource blocks between the starting physical resource block of the first downlink bandwidth part and a reference point, the reference point being a common reference point of a resource block grid, and the reference point being used to indicate the center position of subcarrier 0 in a common resource block (CRB 0) configured with a preset subcarrier spacing.

45. The device according to claim 37, wherein, the SIB1 includes the first configuration information and second configuration information, and the second configuration information is the configuration information of the first downlink bandwidth part.

46. The device according to any one of claims 37 to 45, wherein, The first control resource set is a common control resource set, and the identifier of the first control resource set is not 0.

47. The apparatus according to any one of claims 37 to 45, wherein, the moment when the terminal device's initial access is successful is one of the following moments: the moment when the apparatus receives the acknowledgement message sent by the terminal device for the initial transmission message 4 sent by the apparatus; the moment when the apparatus receives the acknowledgement message sent by the terminal device for the retransmission message 4 sent by the apparatus; the moment when, after the apparatus receives the acknowledgement message sent by the terminal device for the initial transmission message 4 sent by the apparatus, the apparatus sends the configuration information of the DCI for indicating that blind detection of C-RNTI scrambling is required to the terminal device; the moment when, after the apparatus receives the acknowledgement message sent by the terminal device for the retransmission message 4 sent by the apparatus, the apparatus sends the configuration information of the DCI for indicating that blind detection of C-RNTI scrambling is required to the terminal device.

48. The apparatus according to any one of claims 37 to 45, wherein, the uplink and downlink scheduling control information is control information for scheduling a random access response, control information for scheduling a paging message, or control information for scheduling a system message.

49. A computer-readable storage medium, wherein, the computer-readable storage medium stores computer instructions, and the computer instructions cause the terminal device to execute the method according to any one of claims 1 to 12, or the method according to any one of claims 13 to 24 is executed.

50. An apparatus, wherein, the apparatus includes a processor and a storage medium, the storage medium stores instructions, and when the instructions are run by the processor, the processor executes the method according to any one of claims 1 to 12, or the method according to any one of claims 13 to 24.

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