Method and apparatus for determining operating frequency band, base station, duplexer, and medium

Abstract

The present disclosure discloses a method and apparatus for determining an operating frequency band, a base station, a duplexer, and a medium. The method comprises: determining candidate frequency band information, the candidate frequency band information comprising a transmission frequency and a receiving frequency corresponding to each frequency-division duplexing (FDD) frequency band among a plurality of FDD frequency bands; determining a plurality of transmission operating frequencies and a plurality of receiving operating frequencies supported by a radio frequency front end of a base station; and, on the basis of the candidate frequency band information, determining a target operating frequency band of a duplexer matching the radio frequency front end from the plurality of transmission operating frequencies and the plurality of receiving operating frequencies, a target transmission operating frequency and a target receiving operating frequency that correspond to the target operating frequency band corresponding to different FDD frequency bands, respectively. According to the described technical solution, the degree of isolation of the duplexer matching the radio frequency front end of the base station can be improved without increasing the costs, the occupied layout area, and insertion loss.

Description

Method, device, base station, duplexer and medium for determining working frequency band

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 2024103838743 filed with the Chinese Patent Office on April 1, 2024, entitled “A method, device, base station, duplexer and medium for determining a working frequency band,” the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The embodiments of the present disclosure relate to the field of communication technologies, and in particular to a method, device, base station, duplexer, and medium for determining an operating frequency band. Background Art

[0004] The RF front-end of a low-power base station (such as a small cell) usually supports two or more frequency division duplexing (FDD) frequency bands. A duplexer can be set in the RF front-end of the base station to distinguish between uplink and downlink during communication.

[0005] In practical applications, higher duplexer isolation indicates better duplexer performance and more effective suppression of interference signals. Existing technology can improve duplexer isolation by cascading two surface acoustic wave (SAW) duplexers, but this approach is costly, requires more board space, and has higher insertion loss.

[0006] Application Contents

[0007] The present disclosure provides a method, device, base station, duplexer and medium for determining an operating frequency band, which can improve the isolation of a duplexer adapted to the radio frequency front end of a base station without increasing cost, occupying board area or insertion loss.

[0008] An embodiment of the present disclosure provides a method for determining an operating frequency band, which is applied to a base station. The method includes:

[0009] Determining candidate frequency band information, where the candidate frequency band information includes a transmit frequency and a receive frequency corresponding to each of a plurality of frequency division duplex (FDD) frequency bands;

[0010] Determining a plurality of transmitting operating frequencies and a plurality of receiving operating frequencies supported by a radio frequency front end of the base station;

[0011] Based on the candidate frequency band information, the target operating frequency band of the duplexer adapted by the RF front end is determined from multiple transmitting operating frequencies and multiple receiving operating frequencies, and the target transmitting operating frequency and the target receiving operating frequency corresponding to the target operating frequency band respectively correspond to different FDD frequency bands.

[0012] Optionally, the candidate frequency band information further includes a frequency band identifier corresponding to each FDD frequency band. Accordingly, based on the candidate frequency band information, determining a target operating frequency band of the duplexer adapted by the RF front end from a plurality of transmit operating frequencies and a plurality of receive operating frequencies includes:

[0013] Determining, based on the candidate frequency band information, a frequency band identifier corresponding to each of the multiple transmit operating frequencies;

[0014] Determining, based on the candidate frequency band information, a frequency band identifier corresponding to each receiving operating frequency in the multiple receiving operating frequencies;

[0015] Any combination of a transmitting operating frequency and a receiving operating frequency corresponding to different frequency band identifiers is determined as a target operating frequency band of the duplexer adapted by the radio frequency front end.

[0016] Optionally, determining, based on the candidate frequency band information, a frequency band identifier corresponding to each of the multiple transmit operating frequencies includes:

[0017] For each transmitting operating frequency, the frequency band identifier corresponding to the transmitting frequency consistent with the transmitting operating frequency in the candidate frequency band information is determined as the frequency band identifier corresponding to the transmitting operating frequency.

[0018] Optionally, determining, based on the candidate frequency band information, a frequency band identifier corresponding to each receiving operating frequency in the multiple receiving operating frequencies includes:

[0019] For each receiving operating frequency, a frequency band identifier corresponding to a receiving frequency consistent with the receiving operating frequency in the candidate frequency band information is determined as the frequency band identifier corresponding to the receiving operating frequency.

[0020] Optionally, the multiple FDD frequency bands included in the candidate frequency band information are FDD frequency bands defined in the Third Generation Partnership Project 3GPP.

[0021] Optionally, the duplexer is a surface acoustic wave (SAW) duplexer.

[0022] The present disclosure also provides a device for determining an operating frequency band, which is configured in a base station. The device includes:

[0023] A first determining module is configured to determine candidate frequency band information, where the candidate frequency band information includes a transmitting frequency and a receiving frequency corresponding to each of a plurality of frequency division duplex (FDD) frequency bands;

[0024] A second determining module is configured to determine a plurality of transmitting operating frequencies and a plurality of receiving operating frequencies supported by the radio frequency front end of the base station;

[0025] The third determination module is configured to determine the target operating frequency band of the duplexer adapted by the RF front-end from multiple transmitting operating frequencies and multiple receiving operating frequencies based on the candidate frequency band information, and the target transmitting operating frequency and the target receiving operating frequency corresponding to the target operating frequency band respectively correspond to different FDD frequency bands.

[0026] The present disclosure also provides a base station, including:

[0027] at least one processor; and

[0028] a memory communicatively connected to the at least one processor; wherein,

[0029] The memory stores a computer program executable by the at least one processor. The computer program is executed by the at least one processor to enable the at least one processor to perform the method according to the first aspect.

[0030] The present disclosure also provides a duplexer, including:

[0031] A first filter configured to pass a target transmit operating frequency and a second filter configured to pass a target receive operating frequency, wherein the target transmit operating frequency and the target receive operating frequency are determined based on the method according to the first aspect.

[0032] An embodiment of the present disclosure further provides a computer-readable storage medium having a computer program stored thereon, which implements the method described in the first aspect when the program is executed by a processor.

[0033] The embodiments of the present disclosure provide a method, device, base station, duplexer and medium for determining an operating frequency band, the method being applied to a base station, the method comprising: determining candidate frequency band information, the candidate frequency band information comprising a transmit frequency and a receive frequency corresponding to each of a plurality of frequency division duplex (FDD) frequency bands; determining a plurality of transmit operating frequencies and a plurality of receive operating frequencies supported by the RF front end of the base station; based on the candidate frequency band information, determining a target operating frequency band of the duplexer adapted by the RF front end from the plurality of transmit operating frequencies and the plurality of receive operating frequencies, the target transmitting operating frequency and the target receiving operating frequency corresponding to the target operating frequency band respectively corresponding to different FDD frequency bands. The above technical solution can, without increasing the cost, occupying the board area, and inserting the loss, use a combination of the target transmitting operating frequency and the target receiving operating frequency corresponding to different FDD frequency bands as the target operating frequency band of the duplexer adapted by the RF front end of the base station, thereby improving the isolation of the duplexer adapted by the RF front end of the base station as much as possible.

[0034] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] FIG1 is a flow chart of a method for determining a working frequency band according to the present disclosure;

[0037] FIG2 is a schematic structural diagram of a device for determining a working frequency band according to the present disclosure;

[0038] FIG3 is a schematic diagram of a target operating frequency band of a duplexer adapted by a radio frequency front end of a base station according to the present disclosure;

[0039] FIG4 is a schematic structural diagram of a base station implementing an embodiment of the present disclosure. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the solutions of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present disclosure.

[0041] It should be noted that the terms "first," "second," and the like in the present disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the numbers used in this manner are interchangeable where appropriate so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or that are inherent to these processes, methods, products, or apparatus.

[0042] Figure 1 is a flowchart of a method for determining an operating frequency band provided in accordance with the present disclosure. This embodiment is applicable to determining the operating frequency band of a duplexer adapted to the RF front-end of a base station. The method can be performed by an operating frequency band determination device, which can be implemented in the form of software and / or hardware and integrated into the base station.

[0043] In the embodiments of the present disclosure, there is no limitation on base stations. Base stations of any type classified by power can be used, such as small cells, distributed antenna systems (DAS), and other low-power base stations. Small cells can be understood as low-power wireless access nodes.

[0044] As shown in FIG1 , the method includes:

[0045] S110 : Determine candidate frequency band information, where the candidate frequency band information includes a transmitting frequency and a receiving frequency corresponding to each of a plurality of frequency division duplex (FDD) frequency bands.

[0046] The candidate frequency band information may be information about candidate FDD frequency bands for duplexers paired with the base station's transmit and receive signals. Due to the operating characteristics of frequency division duplexing, each FDD frequency band corresponds to two separate paired frequencies. That is, each FDD frequency band has its own corresponding transmit frequency and receive frequency. These paired frequencies distinguish uplink and downlink signals, and a guard band exists between the transmit and receive frequencies to prevent interference between uplink and downlink signals.

[0047] In the embodiments of the present disclosure, candidate frequency band information can be determined based on actual application needs and is not limited herein. The candidate frequency band information may include the transmit frequency and receive frequency corresponding to each of the multiple FDD frequency bands, and may also include a frequency band identifier corresponding to each FDD frequency band. The frequency band identifier corresponding to the FDD frequency band can be understood as a unique identifier configured to distinguish a particular FDD frequency band from other FDD frequency bands.

[0048] In one embodiment, the multiple FDD frequency bands included in the candidate frequency band information are FDD frequency bands defined in the 3rd Generation Partnership Project 3GPP.

[0049] Table 1 shows the frequency band identifier, uplink frequency, and downlink frequency corresponding to each of the multiple FDD frequency bands defined in 3GPP. Table 1 is only an exemplary description of some FDD frequency bands and may also include information corresponding to other FDD frequency bands not shown.

[0050] Table 1 Multiple FDD frequency bands defined in 3GPP

[0051] As can be seen from Table 1, for example, the DL frequency range (i.e., transmit frequency) of frequency band 3 is 1805-1880 MHz, and the UL frequency range (i.e., receive frequency) is 1710-1785 MHz, with a transmit-receive frequency interval of only 20 MHz; the DL frequency range of frequency band 7 is 2620-2690 MHz, and the UL frequency range is 2500-2570 MHz, with a transmit-receive frequency interval of only 50 MHz; the DL frequency range of frequency band 25 is 1930-1995 MHz, and the UL frequency range is 1850-1915 MHz, with a transmit-receive frequency interval of only 15 MHz.

[0052] Due to the fixed transmit and receive frequency restrictions, duplexers adapted for these FDD bands have low isolation. For example, in some FDD bands with transmit and receive frequency spacing less than 50 MHz, surface acoustic wave (SAW) duplexers cannot achieve transmit and receive isolation exceeding 70 dB, even if the SAW duplexer is enlarged to 3 x 3 mm or even larger.

[0053] However, as fifth-generation mobile communication technology (5G) places increasing demands on the DL download speed of small base stations and shared base stations by multiple operators become increasingly common, the bandwidth of each frequency band that the RF module of a base station needs to support is becoming wider and wider. The nonlinear products of the power amplifier (PA) in the FDD band and the degree of signal leakage from the transmit pin to the receive pin (also known as Tx leakage to Rx) have an increasingly greater impact on receive sensitivity. To meet the sensitivity requirements of small base stations, the isolation of the FDD duplexer needs to be greater than or equal to 78dB.

[0054] Therefore, based on the multiple FDD frequency bands included in the candidate frequency band information, the embodiment of the present disclosure redesigns the corresponding working frequency band for the duplexer adapted to the RF front end of the base station to improve the isolation of the duplexer. At the same time, in conjunction with the transmission and reception separation of the same FDD frequency band antenna, the transmission and reception isolation of the FDD frequency band can be significantly improved.

[0055] S120: Determine multiple transmitting operating frequencies and multiple receiving operating frequencies supported by the radio frequency front end of the base station.

[0056] The transmit operating frequency refers to the base station's operating frequency when transmitting signals, while the receive operating frequency refers to the base station's operating frequency when receiving signals. A base station's RF front-end typically supports multiple transmit and receive operating frequencies. These frequencies are not limited and can be factory-set.

[0057] It should be noted that the transmitting frequencies corresponding to the multiple FDD frequency bands included in the candidate frequency band information may include the multiple transmitting operating frequencies supported by the RF front-end of the base station in this step; the receiving frequencies corresponding to the multiple FDD frequency bands included in the candidate frequency band information may include the multiple receiving operating frequencies supported by the RF front-end of the base station in this step.

[0058] S130. Based on the candidate frequency band information, determine a target operating frequency band of the duplexer adapted by the RF front-end from a plurality of transmitting operating frequencies and a plurality of receiving operating frequencies, wherein the target transmitting operating frequency and the target receiving operating frequency corresponding to the target operating frequency band respectively correspond to different FDD frequency bands.

[0059] The target operating frequency band can be understood as the frequency band required for operation of the duplexer adapted by the base station's RF front-end, as determined in the embodiments of the present disclosure. The target operating frequency band corresponds to a pair of operating frequencies: a target transmit operating frequency (the frequency configured to transmit signals) and a target receive operating frequency (the frequency configured to receive signals). These paired operating frequencies distinguish between uplink and downlink links.

[0060] In this step, the FDD frequency band corresponding to each of the multiple transmit operating frequencies in the candidate frequency band information can be determined; the FDD frequency band corresponding to each of the multiple receive operating frequencies in the candidate frequency band information can be determined; and any combination of a transmit operating frequency and a receive operating frequency corresponding to a different FDD frequency band can be determined as a target operating frequency band. The target transmit operating frequency is the transmit operating frequency included in the combination corresponding to the target operating frequency band; and the target receive operating frequency is the receive operating frequency included in the combination corresponding to the target operating frequency band.

[0061] In one embodiment, the duplexer is a surface acoustic wave (SAW) duplexer. In the disclosed embodiments, a SAW duplexer is used as the duplexer for the base station's RF front-end adaptation, reducing its size and cost to a certain extent compared to dielectric duplexers. Furthermore, in the disclosed embodiments, there is no need to cascade two stages of SAW duplexers. By combining different FDD frequency bands for transmission and reception, a single SAW duplexer can be used to improve duplexer isolation.

[0062] It can be understood that after combining transmission and reception in different FDD frequency bands, the transmission and reception antennas of the same FDD frequency band can be separated without increasing the number of antennas, which is equivalent to further improving the isolation between transmission and reception in the FDD frequency band.

[0063] The embodiments of the present disclosure provide a method, device, base station, duplexer and medium for determining an operating frequency band, the method being applied to a base station, the method comprising: determining candidate frequency band information, the candidate frequency band information comprising a transmit frequency and a receive frequency corresponding to each of a plurality of frequency division duplex (FDD) frequency bands; determining a plurality of transmit operating frequencies and a plurality of receive operating frequencies supported by the RF front end of the base station; based on the candidate frequency band information, determining a target operating frequency band of the duplexer adapted by the RF front end from the plurality of transmit operating frequencies and the plurality of receive operating frequencies, the target transmitting operating frequency and the target receiving operating frequency corresponding to the target operating frequency band respectively corresponding to different FDD frequency bands. The above technical solution can, without increasing the cost, occupying the board area, and inserting the loss, use a combination of the target transmitting operating frequency and the target receiving operating frequency corresponding to different FDD frequency bands as the target operating frequency band of the duplexer adapted by the RF front end of the base station, thereby improving the isolation of the duplexer adapted by the RF front end of the base station as much as possible.

[0064] In one embodiment, the candidate frequency band information further includes a frequency band identifier corresponding to each FDD frequency band. Accordingly, based on the candidate frequency band information, determining a target operating frequency band of the duplexer adapted by the RF front end from a plurality of transmit operating frequencies and a plurality of receive operating frequencies includes:

[0065] Determining, based on the candidate frequency band information, a frequency band identifier corresponding to each of the multiple transmit operating frequencies;

[0066] Determining, based on the candidate frequency band information, a frequency band identifier corresponding to each receiving operating frequency in the multiple receiving operating frequencies;

[0067] Any combination of a transmitting operating frequency and a receiving operating frequency corresponding to different frequency band identifiers is determined as a target operating frequency band of the duplexer adapted by the radio frequency front end.

[0068] Based on the transmission frequencies corresponding to the various FDD frequency bands included in the candidate frequency band information, the frequency band identifier of the FDD frequency band corresponding to each of the multiple transmission operating frequencies is determined; based on the receiving frequencies corresponding to the various FDD frequency bands included in the candidate frequency band information, the frequency band identifier of the FDD frequency band corresponding to each of the multiple receiving operating frequencies is determined; and any combination of the transmission operating frequency and the receiving operating frequency corresponding to different frequency band identifiers is determined as the target operating frequency band of the duplexer adapted by the RF front-end.

[0069] In one embodiment, determining, based on the candidate frequency band information, a frequency band identifier corresponding to each of the multiple transmit operating frequencies includes:

[0070] For each transmitting operating frequency, the frequency band identifier corresponding to the transmitting frequency consistent with the transmitting operating frequency in the candidate frequency band information is determined as the frequency band identifier corresponding to the transmitting operating frequency.

[0071] In one embodiment, determining, based on the candidate frequency band information, a frequency band identifier corresponding to each receiving operating frequency in the multiple receiving operating frequencies includes:

[0072] For each receiving operating frequency, a frequency band identifier corresponding to a receiving frequency consistent with the receiving operating frequency in the candidate frequency band information is determined as the frequency band identifier corresponding to the receiving operating frequency.

[0073] The following is an exemplary description of the SAW duplexer adapted to the RF front end of the base station, in conjunction with Table 1:

[0074] For example, for the transmit operating frequency 2110-2170 MHz, the frequency band corresponding to the transmit frequency (i.e., DL) in the candidate frequency band information that is consistent with the transmit operating frequency is identified as frequency band 1;

[0075] For example, for a transmitting operating frequency of 1805-1880 MHz, the frequency band corresponding to the transmitting frequency consistent with the transmitting operating frequency in the candidate frequency band information is identified as frequency band 3;

[0076] For example, for a receiving operating frequency of 1920-1980 MHz, the frequency band corresponding to the receiving frequency (ie, UL) consistent with the receiving operating frequency in the candidate frequency band information is identified as frequency band 1;

[0077] For example, for a receiving operating frequency of 1710-1785 MHz, the frequency band identifier corresponding to the receiving frequency consistent with the receiving operating frequency in the candidate frequency band information is frequency band 3.

[0078] The transmit operating frequency corresponding to Band 1 and the receive operating frequency corresponding to Band 3 can be combined to form the target operating frequency band of one SAW duplexer. Alternatively, the receive operating frequency corresponding to Band 1 and the transmit operating frequency corresponding to Band 3 can be combined to form the target operating frequency band of another SAW duplexer. This arrangement increases the transmit and receive frequency separation between the two duplexers from a minimum of 20 MHz to a minimum of 40 MHz.

[0079] Similarly, based on the above combination, the transmit operating frequency corresponding to band 2 / 25 and the receive operating frequency corresponding to band 4 / 66 can be combined as the target operating frequency band of one SAW duplexer; the receive operating frequency corresponding to band 2 / 25 and the transmit operating frequency corresponding to band 4 / 66 can also be combined as the target operating frequency band of another SAW duplexer. The advantage of this setting is that the transmit and receive frequency interval between the two duplexers is increased from a minimum of 15MHz to a minimum of 150MHz.

[0080] By combining the transmission and reception of different FDD frequency bands into a target operating frequency band through the above method, the transmit and receive isolation of the SAW duplexer can still reach 60dB. In addition, since the transmit and receive antennas corresponding to the target operating frequency band are separated (not the same antenna), an isolation of about 20dB can be provided between the antennas. Therefore, when the RF front end of the small base station uses a SAW duplexer to distinguish between uplink and downlink, without increasing the number, size, cost, or number of duplexers, the transmit and receive isolation of the same target operating frequency band can reach 60+20=80dB, which can meet the needs of most application scenarios.

[0081] FIG2 is a schematic diagram of the structure of a device for determining an operating frequency band according to the present disclosure. This embodiment is applicable to the case of determining the operating frequency band of the duplexer adapted by the radio frequency front end of the base station. As shown in FIG2 , the specific structure of the device includes:

[0082] A first determining module 21 is configured to determine candidate frequency band information, where the candidate frequency band information includes a transmitting frequency and a receiving frequency corresponding to each of a plurality of frequency division duplex (FDD) frequency bands;

[0083] A second determining module 22 is configured to determine a plurality of transmitting operating frequencies and a plurality of receiving operating frequencies supported by the radio frequency front end of the base station;

[0084] The third determination module 23 is configured to determine the target operating frequency band of the duplexer adapted by the RF front-end from multiple transmitting operating frequencies and multiple receiving operating frequencies based on the candidate frequency band information, and the target transmitting operating frequency and the target receiving operating frequency corresponding to the target operating frequency band respectively correspond to different FDD frequency bands.

[0085] As you can understand, using this inter-frequency duplexer allows the transmit and receive antennas in the same FDD band to be allocated to two separate antennas without increasing the number of antennas. This means that the transmit and receive antennas in the same FDD band can be separated without increasing the number of antennas, significantly improving the isolation between transmit and receive signals across FDD bands.

[0086] The working frequency band determination device provided in this embodiment first determines the candidate frequency band information through a first determination module, and the candidate frequency band information includes the transmitting frequency and receiving frequency corresponding to each FDD frequency band in multiple frequency division duplex FDD frequency bands; then determines the multiple transmitting working frequencies and multiple receiving working frequencies supported by the RF front end of the base station through a second determination module; finally, based on the candidate frequency band information, the third determination module determines the target working frequency band of the duplexer adapted by the RF front end from the multiple transmitting working frequencies and the multiple receiving working frequencies, and the target transmitting working frequency and the target receiving working frequency corresponding to the target working frequency band correspond to different FDD frequency bands respectively. The above technical solution can, without increasing the cost, occupying the board area, and inserting loss, use the combination of the target transmitting working frequency and the target receiving working frequency corresponding to different FDD frequency bands as the target working frequency band of the duplexer adapted by the RF front end of the base station, thereby improving the isolation of the duplexer adapted by the RF front end of the base station as much as possible.

[0087] Optionally, the candidate frequency band information further includes a frequency band identifier corresponding to each FDD frequency band. Accordingly, the third determining module 23 includes:

[0088] a fourth determining module configured to determine a frequency band identifier corresponding to each of the plurality of transmitting operating frequencies based on the candidate frequency band information;

[0089] a fifth determining module configured to determine, based on the candidate frequency band information, a frequency band identifier corresponding to each receiving operating frequency in the plurality of receiving operating frequencies;

[0090] The sixth determination module is configured to determine any combination of a transmitting operating frequency and a receiving operating frequency corresponding to different frequency band identifiers as a target operating frequency band of the duplexer adapted by the RF front end.

[0091] Optionally, the fourth determining module is specifically configured to:

[0092] For each transmitting operating frequency, the frequency band identifier corresponding to the transmitting frequency consistent with the transmitting operating frequency in the candidate frequency band information is determined as the frequency band identifier corresponding to the transmitting operating frequency.

[0093] Optionally, the fifth determining module is specifically configured to:

[0094] For each receiving operating frequency, a frequency band identifier corresponding to a receiving frequency consistent with the receiving operating frequency in the candidate frequency band information is determined as the frequency band identifier corresponding to the receiving operating frequency.

[0095] Optionally, the multiple FDD frequency bands included in the candidate frequency band information are FDD frequency bands defined in the Third Generation Partnership Project 3GPP.

[0096] Optionally, the duplexer is a surface acoustic wave (SAW) duplexer.

[0097] The operating frequency band determination device provided in the embodiments of the present disclosure can execute the operating frequency band determination method provided in any embodiment of the present disclosure, and has the corresponding functional modules and beneficial effects of the execution method.

[0098] An embodiment of the present disclosure provides a duplexer, which includes a first filter configured to pass a target transmitting operating frequency and a second filter configured to pass a target receiving operating frequency. The target transmitting operating frequency and the target receiving operating frequency are determined based on the operating frequency band determination method provided in any embodiment of the present disclosure.

[0099] The first filter and the second filter can both be bandpass filters. The first filter only allows the target transmit operating frequency to pass, and the second filter only allows the target receive operating frequency to pass. The target transmit operating frequency and the target receive operating frequency are combined to form the target operating frequency band of the duplexer adapted by the base station's RF front-end. Any details not fully described in this embodiment can be referred to the above embodiments and will not be repeated here.

[0100] Figure 3 is a schematic diagram of a target operating frequency band of a duplexer adapted by the RF front end of a base station provided in accordance with the present disclosure. As shown in Figure 3, the transmitting operating frequencies supported by the RF front end of the base station include: B1-Tx (i.e., the downlink frequency 2110-2170MHz corresponding to FDD band 1 in Table 1), B3-Tx (i.e., the downlink frequency 1805-1880MHz corresponding to FDD band 3 in Table 1). The receiving operating frequencies supported by the RF front end of the base station include: B1-Rx (i.e., the uplink frequency 1920-1980MHz corresponding to FDD band 1 in Table 1), B3-Rx (i.e., the uplink frequency 1710-1785MHz corresponding to FDD band 3 in Table 1). By combining the transmitting operating frequency and the receiving operating frequency supported by the RF front end of the base station in different frequency bands, the target operating frequency band of the duplexer adapted by the RF front end of the base station can be determined.

[0101] As shown in Figure 3, the target operating frequency band of SAW duplexer 1 or SAW duplexer 2 can be a combination of B1-Rx corresponding to FDD band 1 and B3-Tx corresponding to FDD band 3, that is, the target transmitting operating frequency is B3-Tx (1805-1880MHz) and the target receiving operating frequency is B1-Rx (1920-1980MHz).

[0102] As shown in Figure 3, the target operating frequency band of SAW duplexer 3 or SAW duplexer 4 can be a combination of B1-Tx corresponding to FDD band 1 and B3-Rx corresponding to FDD band 3, that is, the target transmitting operating frequency is B1-Tx (2110-2170MHz) and the target receiving operating frequency is B3-Rx (1710-1785MHz).

[0103] The technical solution of the embodiment of the present disclosure can maximize the isolation of the duplexer adapted to the RF front end of the base station by combining transmission and reception in different FDD frequency bands.

[0104] Figure 4 is a schematic diagram of the structure of a base station implementing an embodiment of the present disclosure. The components, their connections and relationships, and their functions shown herein are merely examples and are not intended to limit the implementation of the present disclosure described and / or claimed herein.

[0105] As shown in Figure 4, base station 10 includes at least one processor 11 and memory, such as read-only memory (ROM) 12 and random access memory (RAM) 13, communicatively connected to at least one processor 11. The memory stores computer programs executable by the at least one processor, and processor 11 can perform various appropriate actions and processes based on the computer program stored in read-only memory (ROM) 12 or loaded from storage unit 18 into random access memory (RAM) 13. RAM 13 can also store various programs and data required for the operation of base station 10. Processor 11, ROM 12, and RAM 13 are interconnected via bus 14. An input / output (I / O) interface 15 is also connected to bus 14.

[0106] Various components in the base station 10 are connected to the I / O interface 15, including an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the base station 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0107] The processor 11 can be any general-purpose and / or specialized processing component with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the method for determining the operating frequency band.

[0108] In some embodiments, the operating frequency band determination method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the base station 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the operating frequency band determination method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the operating frequency band determination method in any other appropriate manner (e.g., by means of firmware).

[0109] Various embodiments of the systems and techniques described herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), system-on-chip systems (SOCs), programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that are executable and / or interpreted on a programmable system that includes at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0110] Computer programs configured to implement the methods of the present disclosure may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0111] In the context of the present disclosure, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by an instruction execution system, device or equipment or used in combination with an instruction execution system, device or equipment. A computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. A more specific example of a machine-readable storage medium can include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0112] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0113] A computing system may include clients and servers. The clients and servers are typically remote from each other and typically interact via a communication network. This client-server relationship arises through computer programs running on the respective computers, creating a client-server relationship. The server may be a cloud server, also known as a cloud computing server or cloud host. This server is a hosting product within the cloud computing service ecosystem that addresses the management difficulties and limited scalability of traditional physical hosting and VPS services.

[0114] It should be understood that the various forms of processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this disclosure can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions of this disclosure can be achieved, and this document is not limited here.

[0115] The above specific embodiments do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure shall be included within the scope of protection of this disclosure. Industrial Applicability

[0116] The embodiments of the present disclosure provide a method, device, base station, duplexer, and medium for determining an operating frequency band, which can improve the isolation of a duplexer adapted to the RF front end of a base station without increasing cost, occupying board area, or increasing insertion loss.

Claims

1. A method for determining an operating frequency band, characterized in that: Applied to a base station, the method includes: Determining candidate frequency band information, where the candidate frequency band information includes a transmit frequency and a receive frequency corresponding to each of a plurality of frequency division duplex (FDD) frequency bands; Determining a plurality of transmitting operating frequencies and a plurality of receiving operating frequencies supported by a radio frequency front end of the base station; Based on the candidate frequency band information, the target operating frequency band of the duplexer adapted by the RF front end is determined from multiple transmitting operating frequencies and multiple receiving operating frequencies, and the target transmitting operating frequency and the target receiving operating frequency corresponding to the target operating frequency band respectively correspond to different FDD frequency bands.

2. The method according to claim 1, characterized in that The candidate frequency band information further includes a frequency band identifier corresponding to each FDD frequency band. Accordingly, based on the candidate frequency band information, determining a target operating frequency band of the duplexer adapted by the RF front end from a plurality of transmit operating frequencies and a plurality of receive operating frequencies includes: Determining, based on the candidate frequency band information, a frequency band identifier corresponding to each of the multiple transmit operating frequencies; Determining, based on the candidate frequency band information, a frequency band identifier corresponding to each receiving operating frequency in the multiple receiving operating frequencies; Any combination of a transmitting operating frequency and a receiving operating frequency corresponding to different frequency band identifiers is determined as a target operating frequency band of the duplexer adapted by the radio frequency front end.

3. The method according to claim 2, characterized in that Determining, based on the candidate frequency band information, a frequency band identifier corresponding to each of the multiple transmit operating frequencies, includes: For each transmitting operating frequency, the frequency band identifier corresponding to the transmitting frequency consistent with the transmitting operating frequency in the candidate frequency band information is determined as the frequency band identifier corresponding to the transmitting operating frequency.

4. The method according to any one of claims 2 to 3, characterized in that: Determining, based on the candidate frequency band information, a frequency band identifier corresponding to each receiving operating frequency in the multiple receiving operating frequencies includes: For each receiving operating frequency, the frequency band identifier corresponding to the receiving frequency consistent with the receiving operating frequency in the candidate frequency band information is determined as the frequency band identifier corresponding to the receiving operating frequency.

5. The method according to any one of claims 1 to 4, characterized in that The multiple FDD frequency bands included in the candidate frequency band information are FDD frequency bands defined in the Third Generation Partnership Project 3GPP.

6. The method according to any one of claims 1 to 5, characterized in that The duplexer is a surface acoustic wave (SAW) duplexer.

7. A device for determining a working frequency band, characterized in that: Applied to a base station, the device includes: A first determining module is configured to determine candidate frequency band information, where the candidate frequency band information includes a transmitting frequency and a receiving frequency corresponding to each of a plurality of frequency division duplex (FDD) frequency bands; A second determining module is configured to determine a plurality of transmitting operating frequencies and a plurality of receiving operating frequencies supported by the radio frequency front end of the base station; The third determination module is configured to determine the target operating frequency band of the duplexer adapted by the RF front-end from multiple transmitting operating frequencies and multiple receiving operating frequencies based on the candidate frequency band information, and the target transmitting operating frequency and the target receiving operating frequency corresponding to the target operating frequency band respectively correspond to different FDD frequency bands.

8. A base station, characterized in that: include: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor. The computer program is executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 6.

9. A duplexer, characterized in that: include: A first filter configured to pass a target transmit operating frequency and a second filter configured to pass a target receive operating frequency, wherein the target transmit operating frequency and the target receive operating frequency are determined based on the method according to any one of claims 1-6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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