Uplink carrier selection method, terminal, base station and storage medium

Abstract

The embodiment of the invention discloses an uplink carrier selection method, a terminal, a base station and a storage medium, and the uplink carrier selection method applied to the terminal comprises the steps: receiving a first synchronous broadcast block through a first carrier of a first frequency band, and measuring the signal quality of the first synchronous broadcast block; selecting an optimal uplink carrier based on the signal quality of the first synchronous broadcast block and / or the relative path loss of a second carrier of a second frequency band; wherein the second carrier is within the coverage range of the first synchronous broadcast block.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular to an uplink carrier selection method, a terminal, a base station, and a storage medium. Background Art

[0002] The future wireless network will be a network that is deeply integrated with all frequency band resources such as low-frequency bands below 6GHz, mid-frequency bands, millimeter waves, terahertz, and visible light, and can meet the consistency requirements of user experience based on the dynamic complementarity of multiple frequency bands. Multi-band fusion networking technology uses carriers of multiple frequency bands as a service cell. After the terminal is turned on, it first searches for cells in a default frequency band to obtain information on all frequency bands belonging to the same service cell.

[0003] At present, for multi-band integrated networking at different sites, on the one hand, when there is no downlink carrier in other frequency bands, the terminal does not need to perform downlink synchronization and cannot select an uplink carrier. On the other hand, when there is a downlink carrier in other frequency bands, the terminal is likely to directly select the nearest high-frequency uplink carrier. However, the high-frequency band has the disadvantages of instability and easy blocking. Based on the above reasons, it is difficult for the terminal to ensure access is initiated on a suitable uplink carrier, and the access success rate is low. Summary of the invention

[0004] The embodiments of the present application provide an uplink carrier selection method, a terminal, and a storage medium, by which the terminal can timely discover and accurately select an optimal uplink carrier to ensure an access success rate.

[0005] The technical solution of the embodiment of the present application is implemented as follows:

[0006] The embodiment of the present application provides an uplink carrier selection method, which is applied to a terminal, and the method includes:

[0007] receiving a first synchronized broadcast block through a first carrier of a first frequency band, and measuring a signal quality of the first synchronized broadcast block;

[0008] An optimal uplink carrier is selected based on the signal quality of the first synchronized broadcast block and / or the relative path loss of the second carrier of the second frequency band; wherein the second carrier is within the coverage of the first synchronized broadcast block.

[0009] In the above method, it also includes:

[0010] Obtaining an index of the first synchronous broadcast block to obtain a first index;

[0011] Receiving system information; wherein the system information includes quality thresholds corresponding to indexes of different synchronous broadcast blocks;

[0012] Based on the system information, read a first quality threshold corresponding to the first index, and determine a threshold type of the first quality threshold from a first type and a second type;

[0013] The first quality threshold is used to evaluate the signal quality of the first synchronous broadcast block;

[0014] If the threshold type of the first quality threshold is the first type, it indicates that base stations of other frequency bands are deployed within the coverage of the first synchronous broadcast block;

[0015] If the threshold type of the first quality threshold is the second type, it indicates that no base stations of other frequency bands are deployed within the coverage of the first synchronous broadcast block.

[0016] In the above method, the step of determining the threshold type of the first quality threshold from the first type and the second type includes:

[0017] In a case where the number of quality thresholds carried in the system information is two, if the first quality threshold is the largest, determining that the threshold type of the first quality threshold is the first type; and if the first quality threshold is the smallest, determining that the threshold type of the first quality threshold is the second type;

[0018] In a case where the system information carries type indication information corresponding to each quality threshold, determining a threshold type of the first quality threshold from the first type and the second type according to the type indication information corresponding to the first quality threshold;

[0019] In a case where the system information carries a threshold reference value, if the first quality threshold is greater than or equal to the threshold reference value, determining that the threshold type of the first quality threshold is the first type; otherwise, determining that the threshold type of the first quality threshold is the second type;

[0020] In the case where the system information carries a difference reference value, if the difference between the first quality threshold and the minimum quality threshold carried by the system information is greater than or equal to the difference reference value, the threshold type of the first quality threshold is determined to be the first type; otherwise, the threshold type of the first quality threshold is determined to be the second type.

[0021] In the above method, the selecting the optimal uplink carrier based on the signal quality of the first synchronous broadcast block and / or the relative path loss of the second carrier of the second frequency band includes:

[0022] In a case where there is a downlink carrier in the second carrier and the threshold type of the first quality threshold is the first type, if the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold, and there is an uplink carrier in the first carrier, determining the uplink carrier in the first carrier as the optimal uplink carrier;

[0023] If the signal quality of the first synchronous broadcast block is greater than or equal to the first quality threshold, and there is no uplink carrier in the first carrier, determining the uplink carrier with the smallest relative path loss in the second carrier as the optimal uplink carrier;

[0024] If the signal quality of the first synchronous broadcast block is less than the first quality threshold, and there is an uplink carrier in the second carrier, determining the uplink carrier with the smallest relative path loss in the second carrier as the optimal uplink carrier;

[0025] If the signal quality of the first synchronization broadcast block is less than the first quality threshold and there is no uplink carrier in the second carrier, the uplink carrier in the first carrier is determined as the optimal uplink carrier.

[0026] In the above method, the relative path loss is the ratio of the difference between the transmit and receive power to the transmit power.

[0027] In the above method, the selecting the optimal uplink carrier based on the signal quality of the first synchronous broadcast block and / or the relative path loss of the second carrier of the second frequency band includes:

[0028] In a case where there is a downlink carrier in the second carrier and the threshold type of the first quality threshold is the second type, if the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold, determining an uplink carrier in the first carrier as the optimal uplink carrier;

[0029] If the signal quality of the first synchronous broadcast block is less than the first quality threshold, stop selecting the optimal uplink carrier.

[0030] In the above method, the selecting the optimal uplink carrier based on the signal quality of the first synchronous broadcast block and / or the relative path loss of the second carrier of the second frequency band includes:

[0031] In a case where there is no downlink carrier in the second carrier and the threshold type of the first quality threshold is the first type, if the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold and there is an uplink carrier in the first carrier, determining the uplink carrier in the first carrier as the optimal uplink carrier;

[0032] If the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold and there is no uplink carrier in the first carrier, or the signal quality of the first synchronization broadcast block is less than the first quality threshold, the uplink carrier with the lowest frequency in the second carrier is determined as the optimal uplink carrier.

[0033] In the above method, the selecting the optimal uplink carrier based on the signal quality of the first synchronous broadcast block and / or the relative path loss of the second carrier of the second frequency band includes:

[0034] In a case where there is no downlink carrier in the second carrier and the threshold type of the first quality threshold is the second type, if the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold, determining an uplink carrier in the first carrier as the optimal uplink carrier;

[0035] If the signal quality of the first synchronous broadcast block is less than the first quality threshold, stop selecting the optimal uplink carrier.

[0036] The present application provides an uplink carrier selection method, which is applied to a base station. The method includes:

[0037] A first synchronization broadcast block is sent through a first carrier in a first frequency band so that a terminal receives the first synchronization broadcast block through the first carrier, and an optimal uplink carrier is selected based on the signal quality of the first synchronization broadcast block and / or the relative path loss of the second carrier in the second frequency band; wherein the second carrier is within the coverage range of the first synchronization broadcast block.

[0038] In the above method, it also includes:

[0039] Sending system information to the terminal;

[0040] The system information includes quality thresholds corresponding to indexes of different synchronized broadcast blocks, so that the terminal reads a first quality threshold corresponding to a first index of the first synchronized broadcast block from the system information, and determines a threshold type of the first quality threshold from a first type and a second type;

[0041] The first quality threshold is used to evaluate the signal quality of the first synchronous broadcast block;

[0042] If the threshold type of the first quality threshold is the first type, it indicates that base stations of other frequency bands are deployed within the coverage range of the synchronous broadcast block;

[0043] If the threshold type of the first quality threshold is the second type, it indicates that no base stations of other frequency bands are deployed within the coverage of the synchronous broadcast block.

[0044] An embodiment of the present application provides a terminal, including:

[0045] A receiving module, configured to receive a first synchronous broadcast block through a first carrier of a first frequency band, and measure a signal quality of the first synchronous broadcast block;

[0046] A selection module is used to select an optimal uplink carrier based on the signal quality of the first synchronous broadcast block and / or the relative path loss of the second carrier in the second frequency band; wherein the second carrier is within the coverage range of the first synchronous broadcast block.

[0047] An embodiment of the present application provides a base station, including:

[0048] A sending module, used to send a first synchronization broadcast block through a first carrier in a first frequency band, so that a terminal receives the first synchronization broadcast block through the first carrier, and selects an optimal uplink carrier based on the signal quality of the first synchronization broadcast block and / or the relative path loss of the second carrier in the second frequency band; wherein the second carrier is within the coverage range of the first synchronization broadcast block.

[0049] An embodiment of the present application provides a terminal, characterized by comprising: a first processor, a first memory and a first communication bus;

[0050] The first communication bus is used to implement a communication connection between the first processor and the first memory;

[0051] The first processor is used to execute one or more computer programs stored in the first memory to implement an uplink carrier selection method applied to a terminal.

[0052] An embodiment of the present application provides a base station, including: a second processor, a second memory, and a second communication bus;

[0053] The second communication bus is used to implement a communication connection between the second processor and the second memory;

[0054] The second processor is used to execute one or more computer programs stored in the second memory to implement an uplink carrier selection method applied to a base station.

[0055] An embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, and the computer program implements an uplink carrier selection method when executed by a processor.

[0056] The embodiment of the present application provides an uplink carrier selection method, terminal, base station and storage medium. The uplink carrier selection method applied to the terminal includes: receiving a first synchronous broadcast block through a first carrier of a first frequency band, and measuring the signal quality of the first synchronous broadcast block; selecting the optimal uplink carrier based on the signal quality of the first synchronous broadcast block and / or the relative path loss of a second carrier of a second frequency band; wherein the second carrier is within the coverage of the first synchronous broadcast block. The technical solution provided by the embodiment of the present application, the terminal adopts a set uplink carrier selection method, compares the advantages and disadvantages of the carriers from the perspective of signal quality and relative path loss, can timely discover and accurately select the optimal uplink carrier, and ensure the access success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 A flow chart of an uplink carrier selection method provided in an embodiment of the present application Figure 1 ;

[0058] Figure 2 A flow chart of an uplink carrier selection method provided in an embodiment of the present application Figure 2 ;

[0059] Figure 3 A schematic diagram of an exemplary multi-band fusion networking scenario provided in an embodiment of the present application

[0060] Figure 4 A schematic diagram of a terminal structure provided in an embodiment of the present application Figure 1 ;

[0061] Figure 5 A schematic diagram of a terminal structure provided in an embodiment of the present application Figure 2 ;

[0062] Figure 6 A schematic diagram of a base station structure provided in an embodiment of the present application Figure 1 ;

[0063] Figure 7 A schematic diagram of a base station structure provided in an embodiment of the present application Figure 2 . DETAILED DESCRIPTION

[0064] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0065] The following will specifically describe the technical solution of the present application and how the technical solution of the present application solves the above technical problems through embodiments and in conjunction with the accompanying drawings. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0066] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0067] In an embodiment of the present application, the uplink carrier selection method can be applicable to a multi-band networking scenario with different sites, that is, it is applicable to a scenario where carriers of multiple frequency bands that do not share a common site are used as a virtual service cell. The first carrier and the second carrier involved in the method may specifically be carriers of different frequency bands belonging to the same service cell.

[0068] An embodiment of the present application provides an uplink carrier selection method, which is applied to a terminal. Figure 1 A flow chart of an uplink carrier selection method provided in an embodiment of the present application Figure 1 .like Figure 1 As shown, in an embodiment of the present application, the uplink carrier selection method applied to the terminal mainly includes the following steps:

[0069] S101. Receive a first synchronized broadcast block via a first carrier in a first frequency band, and measure signal quality of the first synchronized broadcast block.

[0070] In an embodiment of the present application, the terminal may receive a first synchronization signal block (SSB) sent by a base station through a first carrier of a first frequency band, and measure a signal quality of the first SSB.

[0071] It should be noted that in the embodiments of the present application, the first frequency band can be any designated default frequency band, for example, the frequency band with the lowest frequency, and the first carrier is any carrier on the first frequency band. The specific first frequency band and first carrier can be set according to actual needs and application scenarios, and the embodiments of the present application are not limited.

[0072] S102. Select an optimal uplink carrier based on the signal quality of the first synchronized broadcast block and / or the relative path loss of the second carrier in the second frequency band; wherein the second carrier is within the coverage of the first synchronized broadcast block.

[0073] In an embodiment of the present application, the terminal selects the optimal uplink carrier based on the signal quality of the first SSB and / or the relative path loss of the second carrier in the second frequency band.

[0074] It should be noted that in the embodiment of the present application, the second frequency band is a frequency band different from the first frequency band, and the second carrier of the second frequency band is within the coverage range of the first SSB. The specific second carrier of the second frequency band is not limited in the embodiment of the present application.

[0075] In an embodiment of the present application, the terminal also needs to first obtain a first quality threshold for evaluating the signal quality of the first SSB for selecting the optimal uplink carrier. The terminal may also perform the following steps: obtain the index of the first SSB to obtain the first index; receive system information; wherein the system information includes quality thresholds corresponding to the indexes of different SSBs; based on the system information, read the first quality threshold corresponding to the first index, and determine the threshold type of the first quality threshold from the first type and the second type; wherein the first quality threshold is used to evaluate the signal quality of the first SSB; if the threshold type of the first quality threshold is the first type, it indicates that base stations of other frequency bands are deployed within the coverage of the first SSB; if the threshold type of the first quality threshold is the second type, it indicates that base stations of other frequency bands are not deployed within the coverage of the first SSB.

[0076] It should be noted that, in an embodiment of the present application, each SSB has its index, and the index of the SSB corresponds to a quality threshold for evaluating the signal quality of the SSB. The quality thresholds corresponding to the indexes of different SSBs are configured in the system information, and the system information can be specifically sent by the base station to the terminal.

[0077] It should be noted that in the embodiments of the present application, the quality threshold can be determined according to the base station deployment situation. If base stations of other frequency bands are deployed within the SSB coverage area, the quality threshold is set higher and the threshold type is the first type. This can avoid the situation where the terminal may directly select the nearest high-frequency uplink carrier when the signal quality is good enough, and the high-frequency uplink carrier has the disadvantages of instability and easy blocking. If base stations of other frequency bands are not deployed within the SSB coverage area, the threshold is set lower and the threshold type is the second type to ensure that the terminal always selects the optimal uplink carrier.

[0078] In an embodiment of the present application, the terminal determines the threshold type of the first quality threshold from the first type and the second type, including:

[0079] In a case where the number of quality thresholds carried in the system information is two, if the first quality threshold is the largest, determining the threshold type of the first quality threshold to be the first type; if the first quality threshold is the smallest, determining the threshold type of the first quality threshold to be the second type;

[0080] In a case where the system information carries type indication information corresponding to each quality threshold, determining a threshold type of the first quality threshold from the first type and the second type according to the type indication information corresponding to the first quality threshold;

[0081] In the case where the threshold reference value is carried in the system information, if the first quality threshold is greater than or equal to the threshold reference value, determining that the threshold type of the first quality threshold is the first type; otherwise, determining that the threshold type of the first quality threshold is the second type;

[0082] In the case where the system information carries a difference reference value, if the difference between the first quality threshold and the minimum quality threshold carried by the system information is greater than or equal to the difference reference value, the threshold type of the first quality threshold is determined to be the first type; otherwise, the threshold type of the first quality threshold is determined to be the second type.

[0083] It can be understood that in the embodiment of the present application, as described in the above steps, the terminal can compare the quality thresholds, the threshold type of the larger quality threshold is the first type, and the threshold type of the smaller quality threshold is the second type, or the threshold type of the quality threshold can be directly read from the system information, or the quality threshold can be compared with the threshold reference value to determine the threshold type, or the difference relative to the minimum quality threshold can be compared with the difference reference value to determine the threshold type. The specific method used depends on the information carried in the system information, and the embodiment of the present application is not limited.

[0084] It should be noted that in an embodiment of the present application, the system information may also include the SSB transmission power of the first frequency band and the second frequency band, the cell identifier of the service cell of the first carrier including the first frequency band, the frequency points of all frequency bands included in the cell, the bandwidth, the default uplink part bandwidth (Bandwidth Part, BWP), the default downlink BWP, random access related parameter configuration, etc.

[0085] In an embodiment of the present application, the terminal selects the optimal uplink carrier based on the signal quality of the first SSB and / or the relative path loss of the second carrier in the second frequency band, including: when there is a downlink carrier in the second carrier and the threshold type of the first quality threshold is the first type, if the signal quality of the first SSB is greater than or equal to the first quality threshold and there is an uplink carrier in the first carrier, then the uplink carrier in the first carrier is determined as the optimal uplink carrier; if the signal quality of the first SSB is greater than or equal to the first quality threshold and there is no uplink carrier in the first carrier, then the uplink carrier with the smallest relative path loss in the second carrier is determined as the optimal uplink carrier; if the signal quality of the first SSB is less than the first quality threshold and there is an uplink carrier in the second carrier, then the uplink carrier with the smallest relative path loss in the second carrier is determined as the optimal uplink carrier; if the signal quality of the first SSB is less than the first quality threshold and there is an uplink carrier in the second carrier, then the uplink carrier with the smallest relative path loss in the second carrier is determined as the optimal uplink carrier; if the signal quality of the first SSB is less than the first quality threshold and there is no uplink carrier in the second carrier, then the uplink carrier in the first carrier is determined as the optimal uplink carrier.

[0086] It should be noted that, in the embodiment of the present application, the relative path loss is the ratio of the difference between the transmit and receive power to the transmit power.

[0087] It should be noted that in an embodiment of the present application, there is a downlink carrier in the second carrier, and the terminal can first search for the second SSB in the second frequency band to obtain downlink synchronization.

[0088] It can be understood that in the embodiment of the present application, when there is a downlink carrier in the second carrier, if the threshold type of the first quality threshold is the first type, it indicates that there are base stations in other frequency bands within the coverage of the first SSB, and the second carrier of the second frequency band within the coverage of the first SSB is usually of good quality. If the signal quality of the first SSB is greater than or equal to the first quality threshold, it indicates that the signal quality of the first SSB is good. In this case, the uplink carrier in the first carrier can be determined as the optimal uplink carrier to avoid selecting other high-frequency uplink carriers, which will cause instability and easy blocking. Of course, if there is no uplink carrier in the first carrier, the uplink carrier with the smallest relative path loss in the second carrier is considered to be determined as the optimal uplink carrier. In this way, while ensuring uplink access, the transmission quality can also be relatively good. In addition, if the signal quality of the first SSB is less than the first quality threshold, it indicates that the signal quality of the first SSB is poor. In this case, the optimal uplink carrier can be further determined based on whether the second carrier has an uplink carrier and the relative path loss of the uplink carrier.

[0089] In an embodiment of the present application, the terminal selects the optimal uplink carrier based on the signal quality of the first SSB and / or the relative path loss of the second carrier in the second frequency band, and also includes: when there is a downlink carrier in the second carrier and the threshold type of the first quality threshold is the second type, if the signal quality of the first SSB is greater than or equal to the first quality threshold, the uplink carrier in the first carrier is determined as the optimal uplink carrier; if the signal quality of the first SSB is less than the first quality threshold, stop selecting the optimal uplink carrier.

[0090] It can be understood that in an embodiment of the present application, if the threshold type of the first quality threshold is the second type, it indicates that there are no base stations in other frequency bands within the coverage range of the first SSB. Based on this, if the signal quality of the first SSB is greater than or equal to the first quality threshold, it indicates that the signal quality of the first SSB is good. In this case, the uplink carrier in the first carrier can be determined as the optimal uplink carrier. Of course, if the signal quality of the first SSB is less than the first quality threshold, it indicates that the signal quality of the first SSB is poor. In this case, no uplink carrier may be selected.

[0091] In an embodiment of the present application, the terminal selects the optimal uplink carrier based on the signal quality of the first SSB and / or the relative path loss of the second carrier in the second frequency band, and also includes: when there is no downlink carrier in the second carrier and the threshold type of the first quality threshold is the first type, if the signal quality of the first SSB is greater than or equal to the first quality threshold and there is an uplink carrier in the first carrier, the uplink carrier in the first carrier is determined as the optimal uplink carrier; if the signal quality of the first SSB is greater than or equal to the first quality threshold and there is no uplink carrier in the first carrier, or the signal quality of the first SSB is less than the first quality threshold, then the uplink carrier with the lowest frequency in the second carrier is determined as the optimal uplink carrier.

[0092] It can be understood that in an embodiment of the present application, there is no downlink carrier in the second carrier, that is, the second carrier is all uplink carriers. If the threshold type of the first quality threshold is the first type, it indicates that there are base stations in other frequency bands within the coverage range of the first SSB, and the second carrier of the second frequency band within the coverage range of the first SSB is usually of good quality. If the signal quality of the first SSB is greater than or equal to the first quality threshold, it indicates that the signal quality of the first SSB is good. In this case, the uplink carrier in the first carrier can be determined as the optimal uplink carrier to avoid selecting other high-frequency uplink carriers, which will cause instability and easy blocking. Of course, if the first carrier has no uplink carrier, or the signal quality of the first SSB is less than the first quality threshold, it indicates that the signal quality of the first SSB is poor. In this case, the uplink carrier with the lowest frequency in the second carrier can be determined as the optimal uplink carrier to achieve better quality uplink access.

[0093] In an embodiment of the present application, the terminal selects the optimal uplink carrier based on the signal quality of the first SSB and / or the relative path loss of the second carrier in the second frequency band, and also includes: when there is no downlink carrier in the second carrier and the threshold type of the first quality threshold is the second type, if the signal quality of the first SSB is greater than or equal to the first quality threshold, the uplink carrier in the first carrier is determined as the optimal uplink carrier; if the signal quality of the first SSB is less than the first quality threshold, stop selecting the optimal uplink carrier.

[0094] It can be understood that in an embodiment of the present application, if the threshold type of the first quality threshold is the second type, it indicates that there are no base stations in other frequency bands within the coverage range of the first SSB. Based on this, if the signal quality of the first SSB is greater than or equal to the first quality threshold, it indicates that the signal quality of the first SSB is good. In this case, the uplink carrier in the first carrier can be determined as the optimal uplink carrier. If the signal quality of the first SSB is less than the first quality threshold, it indicates that the signal quality of the first SSB is poor. In this case, no uplink carrier may be selected.

[0095] It can be understood that in an embodiment of the present application, the terminal selects the optimal uplink carrier based on the signal quality of the first SBS and / or the relative path loss of the second carrier in the second frequency band. Specifically, by executing the above-mentioned judgment criteria, combined with the quality threshold, threshold type, and whether there is an uplink carrier, downlink carrier and other information, the advantages and disadvantages of the carriers are compared from the perspective of signal quality and relative path loss, and the selection of the optimal uplink carrier is comprehensively considered. The optimal uplink carrier can be discovered and accurately selected in a timely manner, thereby reducing the terminal uplink access delay and ensuring the access success rate.

[0096] The embodiment of the present application also provides an uplink carrier selection method, which is applied to a base station. Figure 2 A flow chart of an uplink carrier selection method provided in an embodiment of the present application Figure 2 .like Figure 2 As shown, the uplink carrier selection method applied to the base station mainly includes the following steps:

[0097] S201. Send a first synchronization broadcast block through a first carrier in a first frequency band so that a terminal receives the first synchronization broadcast block through the first carrier, and select an optimal uplink carrier based on the signal quality of the first synchronization broadcast block and / or the relative path loss of a second carrier in a second frequency band; wherein the second carrier is within the coverage range of the first synchronization broadcast block.

[0098] In an embodiment of the present application, the base station can send the first SSB through the first carrier of the first frequency band. Correspondingly, as described in the above step S101, the terminal can receive the first SSB through the first carrier of the first frequency band to perform uplink carrier selection and determine the optimal uplink carrier.

[0099] In an embodiment of the present application, the base station may also perform the following steps: sending system information to the terminal; wherein the system information includes quality thresholds corresponding to indexes of different SSBs, so that the terminal reads the first quality threshold corresponding to the first index of the first SSB from the system information, and determines the threshold type of the first quality threshold from the first type and the second type; the first quality threshold is used to evaluate the signal quality of the first SSB; if the threshold type of the first quality threshold is the first type, it indicates that base stations of other frequency bands are deployed within the coverage range of the SSB; if the threshold type of the first quality threshold is the second type, it indicates that base stations of other frequency bands are not deployed within the coverage range of the synchronous broadcast block.

[0100] It should be noted that, in the embodiments of the present application, type indication information, threshold reference values, difference reference values, etc. corresponding to each quality threshold may also be carried in the system information, which is used to enable the terminal to determine the threshold type of the quality threshold. In addition, the system information may further include the SSB transmission power of the first frequency band and the second frequency band, the cell identifier of the serving cell of the first carrier of the first frequency band, the frequency points, bandwidths, default uplink BWP, default downlink BWP, random access related parameter configurations, etc. of all frequency bands included in the cell.

[0101] The following is based on specific examples to illustrate the method for selecting the optimal uplink carrier provided by the present application.

[0102] Figure 3 This is a schematic diagram of an exemplary multi-band fusion networking scenario provided for the embodiments of the present application. As Figure 3 shown, assume that F1 is the carrier of the default frequency band (equivalent to the first carrier of the first frequency band above), and within the coverage range of the transmitted SSB0, there are carriers F2 and F3, corresponding to base stations a and b respectively. Within the coverage range of SSB1, there is carrier F3, within the coverage range of SSB2, there is carrier F2, and within the coverage range of SSB3, there is no carrier of any frequency band. For SSB0, SSB1, and SSB2, the configured quality threshold is 5, for SSB3, the configured quality threshold is 1, for SSB0, SSB1, and SSB2, the configured quality thresholds are 5, 4, and 5, and the threshold types are all the first type. For SSB3, the configured quality threshold is 1, and the threshold type is the second type. For SSB0, SSB1, and SSB2, the configured quality thresholds are 5, 4, and 5, and the threshold reference value is 2. Since the quality thresholds are all greater than the threshold reference value, they are of the first type. For SSB3, the configured quality threshold is 1, which is less than the threshold reference value, so it is of the second type. Or, for SSB0, SSB1, and SSB2, the configured quality thresholds are 5, 4, and 5, for SSB3, the configured threshold is 1, the minimum value of the quality threshold is 1, and the difference reference value is 2. Then the difference between the quality threshold of SSB0 and the minimum value is 5 - 1 = 4 > 2, so the quality threshold of SSB0 is of the first type. Similarly, the quality thresholds of SSB1 and SSB2 are both of the first type, and the quality threshold of SSB3 is of the second type.

[0103] Exemplarily, the transmission power of F1 is 10, the transmission power of F2 is 2, and the transmission power of F3 is 4. Assume that the frequency F1 < F2 < F3. If terminal 1 searches for SSB0 of F1, and assume that both F2 and F3 (F2 and F3 are equivalent to the second carrier above) have downlinks, and terminal 1 searches for SSBs of F2 and F3 to obtain downlink synchronization, then:

[0104] Terminal 1 obtains that the quality threshold of SSB0 is 5;

[0105] The signal quality of SSB0 measured by terminal 1 is 7, which is greater than the quality threshold 5. If F1 has an uplink, the uplink carrier of F1 is selected. If F1 has no uplink, the relative path loss of F3 is 0.5, and the relative path loss of F2 is 0.25, terminal 1 selects the uplink carrier of F2.

[0106] The signal quality of SSB0 measured by terminal 1 is 4, which is less than the quality threshold 5, and when F2 and F3 have uplink, terminal 1 selects the uplink carrier of F2; if F2 has no uplink and F3 has uplink, terminal 1 selects the uplink carrier of F3; if both F2 and F3 have no uplink, terminal 1 selects the uplink carrier of F1;

[0107] If terminal 1 searches for SSB0 of F1, assuming that F2 and F3 have no downlink:

[0108] Terminal 1 selects the quality threshold of SSB0 as 5;

[0109] The signal quality of SSB0 measured by terminal 1 is 7, which is greater than the quality threshold 5. If F1 has an uplink, the uplink carrier of F1 is selected; if F1 has no uplink, the uplink carrier of F2 is selected;

[0110] The signal quality of SSB0 measured by terminal 1 is 4, which is less than the quality threshold 5, and the uplink carrier F2 is selected.

[0111] For example, if terminal 2 searches for SSB3 of F1 and the quality threshold is 1, since the quality threshold is particularly small, the signal quality measured by terminal 2 can basically meet the demand. If it is greater than 1, the uplink carrier of F1 is selected; if it is less than 1, terminal 2 does not select any uplink carrier.

[0112] An embodiment of the present application provides a terminal. Figure 4 A schematic diagram of a terminal structure provided in an embodiment of the present application Figure 1 .like Figure 4 As shown, the terminal includes:

[0113] The receiving module 301 is configured to receive a first synchronous broadcast block through a first carrier of a first frequency band, and measure a signal quality of the first synchronous broadcast block;

[0114] The selection module 302 is used to select the optimal uplink carrier based on the signal quality of the first synchronous broadcast block and / or the relative path loss of the second carrier in the second frequency band; wherein the second carrier is within the coverage of the first synchronous broadcast block.

[0115] In an embodiment of the present application, the receiving module 301 is further used to receive system information; wherein the system information includes quality thresholds corresponding to indexes of different synchronous broadcast blocks;

[0116] The selection module 302 is also used to obtain the index of the first synchronous broadcast block to obtain a first index; based on the system information, read the first quality threshold corresponding to the first index, and determine the threshold type of the first quality threshold from the first type and the second type; wherein the first quality threshold is used to evaluate the signal quality of the first synchronous broadcast block; if the threshold type of the first quality threshold is the first type, it indicates that base stations of other frequency bands are deployed within the coverage range of the first synchronous broadcast block; if the threshold type of the first quality threshold is the second type, it indicates that base stations of other frequency bands are not deployed within the coverage range of the first synchronous broadcast block.

[0117] In an embodiment of the present application, the selection module 302 is further configured to, when the number of quality thresholds carried in the system information is two, if the first quality threshold is the largest, determine that the threshold type of the first quality threshold is the first type; if the first quality threshold is the smallest, determine that the threshold type of the first quality threshold is the second type; when the system information carries type indication information corresponding to each quality threshold, determine the threshold type of the first quality threshold from the first type and the second type according to the type indication information corresponding to the first quality threshold; when the system information carries a threshold reference value, if the first quality threshold is greater than or equal to the threshold reference value, determine that the threshold type of the first quality threshold is the first type; otherwise, determine that the threshold type of the first quality threshold is the second type; when the system information carries a difference reference value, if the difference between the first quality threshold and the minimum quality threshold carried by the system information is greater than or equal to the difference reference value, determine that the threshold type of the first quality threshold is the first type; otherwise, determine that the threshold type of the first quality threshold is the second type.

[0118] In one embodiment of the present application, the selection module 302 is also used to, when there is a downlink carrier in the second carrier and the threshold type of the first quality threshold is the first type, if the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold and there is an uplink carrier in the first carrier, then the uplink carrier in the first carrier is determined as the optimal uplink carrier; if the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold and there is no uplink carrier in the first carrier, then the uplink carrier with the smallest relative path loss in the second carrier is determined as the optimal uplink carrier; if the signal quality of the first synchronization broadcast block is less than the first quality threshold and there is an uplink carrier in the second carrier, then the uplink carrier with the smallest relative path loss in the second carrier is determined as the optimal uplink carrier; if the signal quality of the first synchronization broadcast block is less than the first quality threshold and there is an uplink carrier in the second carrier, then the uplink carrier with the smallest relative path loss in the second carrier is determined as the optimal uplink carrier; if the signal quality of the first synchronization broadcast block is less than the first quality threshold and there is no uplink carrier in the second carrier, then the uplink carrier in the first carrier is determined as the optimal uplink carrier.

[0119] In one embodiment of the present application, the relative path loss is the ratio of the difference between the transmit and receive power to the transmit power.

[0120] In one embodiment of the present application, the selection module 302 is also used to, when there is a downlink carrier in the second carrier and the threshold type of the first quality threshold is the second type, if the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold, then determine the uplink carrier in the first carrier as the optimal uplink carrier; if the signal quality of the first synchronization broadcast block is less than the first quality threshold, stop selecting the optimal uplink carrier.

[0121] In one embodiment of the present application, the selection module 302 is also used to, when there is no downlink carrier in the second carrier and the threshold type of the first quality threshold is the first type, if the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold and there is an uplink carrier in the first carrier, determine the uplink carrier in the first carrier as the optimal uplink carrier; if the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold and there is no uplink carrier in the first carrier, or the signal quality of the first synchronization broadcast block is less than the first quality threshold, then determine the uplink carrier with the lowest frequency in the second carrier as the optimal uplink carrier.

[0122] In one embodiment of the present application, the selection module 302 is also used to, when there is no downlink carrier in the second carrier and the threshold type of the first quality threshold is the second type, if the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold, then determine the uplink carrier in the first carrier as the optimal uplink carrier; if the signal quality of the first synchronization broadcast block is less than the first quality threshold, stop selecting the optimal uplink carrier.

[0123] Figure 5 A schematic diagram of a terminal structure provided in an embodiment of the present application Figure 2 .like Figure 5 As shown, the terminal includes: a first processor 401, a first memory 402 and a first communication bus 403;

[0124] The first communication bus 403 is used to implement a communication connection between the first processor 401 and the first memory 402;

[0125] The first processor 401 is configured to execute one or more computer programs stored in the first memory 402 to implement an uplink carrier selection method applied to a terminal.

[0126] The embodiment of the present application also provides a base station. Figure 6 A schematic diagram of a base station structure provided in an embodiment of the present application Figure 1 .like Figure 6 As shown, the base station includes:

[0127] The sending module 501 is used to send a first synchronization broadcast block through a first carrier in a first frequency band, so that a terminal receives the first synchronization broadcast block through the first carrier, and selects an optimal uplink carrier based on the signal quality of the first synchronization broadcast block and / or the relative path loss of the second carrier in the second frequency band; wherein the second carrier is within the coverage range of the first synchronization broadcast block.

[0128] In one embodiment of the present application, the sending module 501 is also used to send system information to the terminal; wherein the system information includes quality thresholds corresponding to indexes of different synchronous broadcast blocks, so that the terminal reads the first quality threshold corresponding to the first index of the first synchronous broadcast block from the system information, and determines the threshold type of the first quality threshold from the first type and the second type; the first quality threshold is used to evaluate the signal quality of the first synchronous broadcast block; if the threshold type of the first quality threshold is the first type, it indicates that base stations of other frequency bands are deployed within the coverage range of the synchronous broadcast block; if the threshold type of the first quality threshold is the second type, it indicates that base stations of other frequency bands are not deployed within the coverage range of the synchronous broadcast block.

[0129] Figure 7 A schematic diagram of a base station structure provided in an embodiment of the present application Figure 2 .like Figure 7 As shown, the base station includes: a second processor 601, a second memory 602 and a second communication bus 603;

[0130] The second communication bus 603 is used to implement a communication connection between the second processor 601 and the second memory 602;

[0131] The second processor 601 is configured to execute one or more computer programs stored in the second memory 602 to implement an uplink carrier selection method applied to a base station.

[0132] The embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and the computer program implements an uplink carrier selection method when executed by a processor. The computer-readable storage medium can be a volatile memory (volatile memory), such as a random access memory (Random-Access Memory, RAM); or a non-volatile memory (non-volatile memory), such as a read-only memory (Read-Only Memory, ROM), a flash memory (flash memory), a hard disk (Hard Disk Drive, HDD) or a solid-state drive (Solid-State Drive, SSD); or it can be a respective device including one or any combination of the above memories, such as a mobile phone, a computer, a tablet device, a personal digital assistant, etc.

[0133] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of hardware embodiments, software embodiments, or embodiments in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0134] The present application is described with reference to implementation flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the process in the flowchart. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0135] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which is implemented in the implementation flow diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0136] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operation steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing the steps in the flowchart. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0137] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the utility application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for selecting an uplink carrier, characterized in that: Applied to a terminal, the method comprises: receiving a first synchronized broadcast block through a first carrier of a first frequency band, and measuring a signal quality of the first synchronized broadcast block; An optimal uplink carrier is selected based on the signal quality of the first synchronized broadcast block and / or the relative path loss of the second carrier of the second frequency band; wherein the second carrier is within the coverage of the first synchronized broadcast block.

2. The method according to claim 1, characterized in that: The method further comprises: Obtaining an index of the first synchronous broadcast block to obtain a first index; Receiving system information; wherein the system information includes quality thresholds corresponding to indexes of different synchronous broadcast blocks; Based on the system information, read a first quality threshold corresponding to the first index, and determine a threshold type of the first quality threshold from a first type and a second type; The first quality threshold is used to evaluate the signal quality of the first synchronous broadcast block; If the threshold type of the first quality threshold is the first type, it indicates that base stations of other frequency bands are deployed within the coverage of the first synchronous broadcast block; If the threshold type of the first quality threshold is the second type, it indicates that no base stations of other frequency bands are deployed within the coverage of the first synchronous broadcast block.

3. The method according to claim 2, characterized in that The determining of the threshold type of the first quality threshold from the first type and the second type comprises: In a case where the number of quality thresholds carried in the system information is two, if the first quality threshold is the largest, determining that the threshold type of the first quality threshold is the first type; and if the first quality threshold is the smallest, determining that the threshold type of the first quality threshold is the second type; In a case where the system information carries type indication information corresponding to each quality threshold, determining a threshold type of the first quality threshold from the first type and the second type according to the type indication information corresponding to the first quality threshold; In a case where the system information carries a threshold reference value, if the first quality threshold is greater than or equal to the threshold reference value, determining that the threshold type of the first quality threshold is the first type; otherwise, determining that the threshold type of the first quality threshold is the second type; In the case where the system information carries a difference reference value, if the difference between the first quality threshold and the minimum quality threshold carried by the system information is greater than or equal to the difference reference value, the threshold type of the first quality threshold is determined to be the first type; otherwise, the threshold type of the first quality threshold is determined to be the second type.

4. The method according to claim 2, characterized in that: The selecting the optimal uplink carrier based on the signal quality of the first synchronous broadcast block and / or the relative path loss of the second carrier in the second frequency band includes: In a case where there is a downlink carrier in the second carrier and the threshold type of the first quality threshold is the first type, if the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold, and there is an uplink carrier in the first carrier, determining the uplink carrier in the first carrier as the optimal uplink carrier; If the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold, and there is no uplink carrier in the first carrier, determining the uplink carrier with the smallest relative path loss in the second carrier as the optimal uplink carrier; If the signal quality of the first synchronous broadcast block is less than the first quality threshold, and there is an uplink carrier in the second carrier, determining the uplink carrier with the smallest relative path loss in the second carrier as the optimal uplink carrier; If the signal quality of the first synchronization broadcast block is less than the first quality threshold and there is no uplink carrier in the second carrier, the uplink carrier in the first carrier is determined as the optimal uplink carrier.

5. The method according to claim 4, characterized in that The relative path loss is the ratio of the difference between the transmit and receive power to the transmit power.

6. The method according to claim 2, characterized in that The selecting the optimal uplink carrier based on the signal quality of the first synchronous broadcast block and / or the relative path loss of the second carrier in the second frequency band includes: In a case where there is a downlink carrier in the second carrier and the threshold type of the first quality threshold is the second type, if the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold, determining an uplink carrier in the first carrier as the optimal uplink carrier; If the signal quality of the first synchronous broadcast block is less than the first quality threshold, stop selecting the optimal uplink carrier.

7. The method according to claim 2, characterized in that: The selecting the optimal uplink carrier based on the signal quality of the first synchronous broadcast block and / or the relative path loss of the second carrier in the second frequency band includes: In a case where there is no downlink carrier in the second carrier and the threshold type of the first quality threshold is the first type, if the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold and there is an uplink carrier in the first carrier, determining the uplink carrier in the first carrier as the optimal uplink carrier; If the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold and there is no uplink carrier in the first carrier, or the signal quality of the first synchronization broadcast block is less than the first quality threshold, the uplink carrier with the lowest frequency in the second carrier is determined as the optimal uplink carrier.

8. The method according to claim 2, characterized in that: The selecting the optimal uplink carrier based on the signal quality of the first synchronous broadcast block and / or the relative path loss of the second carrier in the second frequency band includes: In a case where there is no downlink carrier in the second carrier and the threshold type of the first quality threshold is the second type, if the signal quality of the first synchronization broadcast block is greater than or equal to the first quality threshold, determining an uplink carrier in the first carrier as the optimal uplink carrier; If the signal quality of the first synchronous broadcast block is less than the first quality threshold, stop selecting the optimal uplink carrier.

9. A method for selecting an uplink carrier, characterized in that: Applied to a base station, the method comprises: A first synchronization broadcast block is sent through a first carrier in a first frequency band so that a terminal receives the first synchronization broadcast block through the first carrier, and an optimal uplink carrier is selected based on the signal quality of the first synchronization broadcast block and / or the relative path loss of the second carrier in the second frequency band; wherein the second carrier is within the coverage range of the first synchronization broadcast block.

10. The method according to claim 9, characterized in that The method further comprises: Sending system information to the terminal; The system information includes quality thresholds corresponding to indexes of different synchronized broadcast blocks, so that the terminal reads a first quality threshold corresponding to a first index of the first synchronized broadcast block from the system information, and determines a threshold type of the first quality threshold from a first type and a second type; The first quality threshold is used to evaluate the signal quality of the first synchronous broadcast block; If the threshold type of the first quality threshold is the first type, it indicates that base stations of other frequency bands are deployed within the coverage range of the synchronous broadcast block; If the threshold type of the first quality threshold is the second type, it indicates that no base stations of other frequency bands are deployed within the coverage of the synchronous broadcast block.

11. A terminal, characterized in that: include: A receiving module, configured to receive a first synchronous broadcast block through a first carrier of a first frequency band, and measure a signal quality of the first synchronous broadcast block; A selection module is used to select an optimal uplink carrier based on the signal quality of the first synchronous broadcast block and / or the relative path loss of the second carrier in the second frequency band; wherein the second carrier is within the coverage range of the first synchronous broadcast block.

12. A base station, characterized in that: include: A sending module, used to send a first synchronization broadcast block through a first carrier in a first frequency band, so that a terminal receives the first synchronization broadcast block through the first carrier, and selects an optimal uplink carrier based on the signal quality of the first synchronization broadcast block and / or the relative path loss of the second carrier in the second frequency band; wherein the second carrier is within the coverage range of the first synchronization broadcast block.

13. A terminal, characterized in that: include: a first processor, a first memory, and a first communication bus; The first communication bus is used to implement a communication connection between the first processor and the first memory; The first processor is used to execute one or more computer programs stored in the first memory to implement the uplink carrier selection method according to any one of claims 1-8.

14. A base station, characterized in that: include: a second processor, a second memory, and a second communication bus; The second communication bus is used to realize the communication connection between the second processor and the second memory; The second processor is used to execute one or more computer programs stored in the second memory to implement the uplink carrier selection method according to claim 9 or 10.

15. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the uplink carrier selection method according to any one of claims 1 to 10 is implemented.

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