A multi-frequency communication system

Abstract

The present application provides a multi-frequency communication system, which includes a baseband processing chip, a radio frequency integrated chip ROC, a downlink module and a frequency-selective transmitting unit; the frequency-selective transmitting unit has multiple control transmitting modules; the baseband processing chip generates a frequency-selective control signal, sends a digital signal to the ROC, and sends the frequency-selective control signal to the ROC, the downlink module and the frequency-selective transmitting unit; the ROC sets the transmission parameters according to the frequency-selective control signal, converts the digital signal into an analog signal, modulates the analog signal on the target frequency band according to the transmission parameters, and sends the modulated analog signal to the downlink module; the downlink module sends the modulated analog signal to the frequency-selective transmitting unit; the frequency-selective transmitting unit disconnects other control transmitting modules, processes the modulated model signal through the target control module to obtain the radio frequency signal of the target frequency band, and transmits the radio frequency signal of the target frequency band. Through this system, network equipment can select the frequency band of the radio frequency signal and improve spectrum utilization.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a multi-frequency communication system. Background Art

[0002] With the evolution of communication systems, the amount of data transmitted between devices in some application scenarios is extremely large, such as real-time upload of coal mine production data, telemedicine, virtual reality (VR), and augmented reality (AR). To improve the spectrum utilization of communication systems, base station coverage, and transmission speed, base stations can be designed to operate in frequency division duplex (FDD) mode, where the uplink (the physical channel for data transmission signals from mobile stations to base stations) and downlink (the physical channel for data transmission signals from base stations to mobile stations) are transmitted on different frequencies. In an FDD architecture, for downlink transmission, network devices only support a specific transmit frequency band or two adjacent transmit frequency bands. In scenarios with low out-of-band suppression (for example, where network devices are used only to transmit radio frequency signals), when an FDD-mode base station can transmit on two adjacent transmit frequency bands, if the downlink load on one frequency band is high while the downlink load on the other frequency band is low or unloaded, spectrum utilization is reduced, and unnecessary power consumption of the system is increased.

[0003] It can be seen that at a time when spectrum resources are becoming increasingly scarce, how to flexibly allocate spectrum resources and improve spectrum utilization is an urgent problem to be solved. Summary of the Invention

[0004] The present application provides a multi-frequency communication system, through which spectrum resources can be pooled, network equipment can flexibly allocate spectrum resources, and improve spectrum utilization.

[0005] In a first aspect, the present application provides a multi-frequency communication system, which is applied to a network device, and includes a baseband processing chip, a radio frequency integrated chip (ROC), a downlink module (TXSIP), and a frequency-selective transmitting unit; the baseband processing chip is connected to the ROC, the ROC is connected to the TXSIP, the TXSIP is connected to the frequency-selective transmitting unit, and the frequency-selective transmitting unit includes multiple control transmitting modules, each control transmitting unit corresponding to a frequency band; wherein:

[0006] The baseband processing chip is used to generate a frequency selection control signal based on the channel request information from the terminal device. It is also used to send a digital signal to the ROC, and to send a frequency selection control signal to the ROC, TXSIP, and the frequency selection switch. The frequency selection control signal carries the identifier of the selected target frequency band. The ROC is used to set the transmission parameters corresponding to the target frequency band according to the frequency selection control signal. The transmission parameters include the local oscillator frequency and the sampling frequency. It is also used to convert the digital signal into an analog signal and modulate the analog signal onto the target frequency band according to the transmission parameters. It is also used to send the modulated analog signal to the TXSIP. The TXSIP is used to send the modulated analog signal to the frequency selection transmission unit. The frequency selection transmission unit is used to determine the target control transmission module corresponding to the target frequency band from multiple control transmission modules; connect the target control transmission module and disconnect the control transmission modules other than the target control transmission module; process the modulated analog signal through the target control transmission module to obtain a radio frequency signal, and transmit the radio frequency signal.

[0007] Based on the multi-frequency communication system of the first aspect, the network device can flexibly select one or more frequency bands for transmitting radio frequency signals through the frequency selection transmitting unit, thereby realizing flexible and optional multi-frequency signal transmission.

[0008] In one possible implementation, the frequency-selective transmission unit includes a frequency-selective switch, multiple processing units, and an antenna, each processing unit including a power amplifier PA and a filter; the control transmission module consists of a processing unit, a frequency-selective switch, and an antenna; the TXSIP is connected to the frequency-selective switch; wherein: the frequency-selective switch is used to connect the processing unit corresponding to the target frequency band based on the frequency-selective control signal, and disconnect the processing units other than the target processing unit in the multiple processing units; it is also used to receive the modulated analog signal from the TXSIP and send the modulated analog signal to the target processing unit; the target processing unit is used to process the modulated model signal to obtain the radio frequency signal of the target frequency band; the antenna is used to transmit the radio frequency signal of the target frequency band.

[0009] Based on this possible multi-band communication system, network equipment can control the frequency band of the RF signal transmitted by the antenna through a frequency selector switch, thereby pooling downlink spectrum resources and enabling flexible and selectable multi-band signal transmission. In addition, the architecture of replacing the duplexer with a filter simplifies the design complexity of the multi-band duplexer, reducing cost and weight.

[0010] In one possible implementation, the frequency-selective transmission unit includes an ultra-wideband power amplifier (PA), multiple filters, and an antenna; the TXSIP is connected to the ultra-wideband PA, the ultra-wideband PA is connected to the multiple filters, and the antenna is connected to the multiple filters; the ultra-wideband PA includes multiple amplification control units, each corresponding to a frequency band, and each filter corresponding to a frequency band; the control transmission module includes an amplification control unit, a filter, and an antenna in the ultra-wideband PA; wherein:

[0011] The ultra-wideband PA is configured to connect the target amplification control unit corresponding to the target frequency band in the ultra-wideband PA via a gate voltage control circuit and disconnect all amplification control units in the ultra-wideband PA except the target amplification control unit. The PA is also configured to receive a modulated analog signal from the TXSIP. The modulated analog signal is amplified via the target control unit and connected to a filter corresponding to the target frequency band to process the modulated analog signal to obtain a radio frequency signal in the target frequency band. The antenna is configured to transmit the radio frequency signal in the target frequency band.

[0012] Based on this possible multi-frequency communication system, network equipment can control the frequency band of the RF signal transmitted by the antenna through the ultra-wideband PA, thereby pooling downlink spectrum resources and achieving flexible and optional multi-frequency signal transmission. In addition, it reduces the design complexity of the filter, reducing cost and weight.

[0013] In one possible implementation, the frequency-selective transmission unit includes an ultra-wideband power amplifier (PA) and a filter antenna. The ultra-wideband PA includes multiple amplification control units, each corresponding to a frequency band. The control transmission module consists of an amplification control unit in the ultra-wideband PA and the filter antenna. The TXSIP is connected to the ultra-wideband PA, and the filter antenna is connected to the ultra-wideband PA via multiple feed ports.

[0014] The UWB PA is configured to activate the target amplification control unit corresponding to the target frequency band in the UWB PA through a gate voltage control circuit, and to deactivate all amplification control units in the UWB PA except the target amplification control unit. The UWB PA is also configured to receive a modulated analog signal from the TXSIP; the target control unit processes the modulated analog signal to generate an RF signal in the target frequency band. The filtering antenna is configured to transmit the RF signal in the target frequency band.

[0015] Based on this possible multi-frequency communication system, network equipment can control the frequency band of the RF signal transmitted by the antenna through an ultra-wideband PA, thereby pooling downlink spectrum resources and achieving flexible and optional multi-frequency signal transmission. This also reduces the design complexity of the filter, reduces cost and weight, and improves integration.

[0016] In one possible implementation, the channel request information includes the frequency band of the terminal device; when the frequency band of the terminal device is different from the working frequency band of the network device, a frequency selection control signal is generated according to the frequency band of the terminal device, and the target frequency band is the frequency band of the terminal device.

[0017] In one possible implementation, the number of target frequency bands is at least two, the baseband processing chip includes multiple baseband processing units, each baseband processing unit corresponds to a target frequency band, and the baseband processing chip is also used to compensate for the amplitude difference between the target frequency bands in the digital domain; the ROC is also used to compensate for the amplitude difference between the target frequency bands in the analog common channel.

[0018] In one possible implementation, the channel request information includes the frequency band in which the terminal device is located and the load status of each frequency band in multiple frequency bands supported by the operator corresponding to the terminal device; the baseband processing chip is used to determine at least two target frequency bands from multiple frequency bands based on the load status of each frequency band, and the load status of the target frequency band is greater than a first value; based on the target frequency band, generate a frequency selection control signal.

[0019] In one possible implementation, the baseband processing chip is further used to send a frequency band switching instruction to the first terminal device if the target frequency band does not include the frequency band where the first terminal device is located, and the frequency band switching instruction is used to instruct the first terminal device to switch to the target frequency band.

[0020] In a second aspect, the present application provides a signal transmission method, which is applied to a network device, and the method includes: the network device obtains frequency band information of a first frequency band in which a terminal device is located; when the first frequency band is equal to a second frequency band corresponding to the network device, the network device sends a radio frequency signal based on the second frequency band; when the first frequency band is not equal to the second frequency band corresponding to the network device, the network device sends a radio frequency signal based on the first frequency band.

[0021] Based on the signal transmission method of the second aspect, when the network device is lightly loaded or unloaded, there is no need to change the current network architecture. The network device can flexibly determine the frequency band of the transmitted signal according to the current operating frequency band of the terminal device, thereby improving the flexibility of the network device in transmitting signals.

[0022] In a third aspect, the present application provides a signal transmission method, which is applied to a network device, and the method includes: the network device obtains frequency band information of a terminal device in a service cell; the network device determines at least two target frequency bands based on the frequency band information of the terminal device in the service cell; and the network device sends a radio frequency signal based on the at least two target frequency bands.

[0023] Based on the signal transmission method of the third aspect, there is no need to change the current network architecture. The network equipment can flexibly determine the frequency band of the transmitted signal based on the frequency band information of the terminal equipment in the service cell, thereby improving the flexibility of the network equipment in transmitting signals and reducing costs without changing the network architecture.

[0024] In one possible implementation, if the target frequency band does not include the frequency band where the first terminal device is located, the network device sends a frequency band switching instruction to the first terminal device, where the frequency band switching instruction is used to instruct the first terminal device to switch to the target frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a communication architecture provided for this application;

[0026] Figure 2 A schematic diagram of a multi-frequency communication architecture provided in this application;

[0027] Figure 3 A schematic diagram of another multi-frequency communication architecture provided by this application;

[0028] Figure 4 A schematic diagram of another multi-frequency communication architecture provided by this application;

[0029] Figure 5 A schematic diagram of another multi-frequency communication architecture provided by this application;

[0030] Figure 6 A flow chart of a signal transmission method provided in this application;

[0031] Figure 7 A flowchart of another signal transmission method provided in this application. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings.

[0033] The terms "first" and "second" and the like in the specification, claims, and drawings of this application are used to distinguish between different objects, not to describe a particular order. Furthermore, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of operations or units is not limited to the listed operations or units, but may optionally include operations or units not listed, or may optionally include other operations or units inherent to the process, method, product, or apparatus.

[0034] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] In the present application, "at least one (item)" refers to one or more, "more than one" refers to two or more, "at least two (items)" refers to two or three and more than three, and "and / or" is used to describe the corresponding relationship between corresponding objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the corresponding objects before and after are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0036] To facilitate understanding of this application, the following first explains the relevant technical features involved in the embodiments of this application. It should be noted that these explanations are intended to make the embodiments of this application easier to understand and should not be regarded as limiting the scope of protection claimed in this application.

[0037] 1. Terminal equipment

[0038] Terminal devices, also known as user equipment (UE), include devices that provide voice and / or data connectivity to users. For example, they may include handheld devices with wireless connectivity or processing devices connected to a wireless modem. The terminal device can communicate with the core network via a radio access network (RAN) and exchange voice and / or data with the RAN. The terminal device may include a wireless terminal device, a mobile terminal device, a device-to-device (D2D) terminal device, a vehicle-to-everything (V2X) terminal device, a machine-to-machine / machine-type communication (M2M / MTC) terminal device, an Internet of Things (IoT) terminal device, a subscriber unit, a subscriber station, a mobile station, a remote station, an access point (AP), a remote terminal, an access terminal, a user terminal, a user agent, or user equipment. For example, it may include a mobile phone (also known as a "cellular" phone), a computer with a mobile terminal device, a portable, pocket-sized, handheld, or computer-integrated mobile device, etc. Examples include personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and other devices. Also included are limited devices, such as those with low power consumption, limited storage capacity, or limited computing power. Examples include information sensing devices such as barcode scanners, radio frequency identification (RFID), sensors, global positioning systems (GPS), and laser scanners.

[0039] 2. Network equipment

[0040] Network equipment is the node or device that connects the terminal device to the wireless network. For example, network equipment includes but is not limited to: the new generation base station (gNB) in the 5G communication system, evolved node B (eNB), next generation eNB (ng-eNB), wireless backhaul equipment, home base station (HeNB or HNB), baseband unit (BBU), transmitting and receiving point (TRP), transmitting point (TP), mobile switching center, etc.

[0041] 3. Baseband signal

[0042] A baseband signal is the raw electrical signal emitted by a signal source (also known as a transmitting terminal), without any modulation (spectral shifting or transformation). It can be understood as a signal that directly expresses the information being transmitted. For example, the sound waves of our speech are baseband signals.

[0043] 4. Frequency, frequency band and frequency point

[0044] Frequency in mobile communications refers to the frequency of wireless signal transmission. For example, in the Global System for Mobile Communications (GSM) 900 network, the uplink receiving frequency range is 890MHz to 915MHz, and the downlink transmitting frequency range is 935MHz to 960MHz.

[0045] The frequency band refers to the frequency range. GSM includes multiple frequency bands. For example, the uplink frequency band of the GSM900 network is 890MHz to 915MHz, and the downlink frequency band is 935MHz to 960MHz.

[0046] Frequency points are numbers assigned to fixed frequencies. For example, the GSM900 network defines 125 fixed frequencies at 200 kHz intervals: 890 MHz, 890.2 MHz, 890.4 MHz, 890.6 MHz, 890.8 MHz, 891 MHz, and so on, 915 MHz. These frequencies are numbered 1, 2, 3, 4, and so on, 125. These numbers are called frequency points. In the GSM network, frequency points are used to specify the receive and transmit frequencies of transceivers (the receive and transmit frequencies have a corresponding relationship). For example, in the GSM900 network, specifying a carrier frequency of 3 indicates that the uplink receive frequency of that carrier is 890.4 MHz, and the downlink transmit frequency is 935.4 MHz.

[0047] 5. Multi-frequency antennas and broadband antennas

[0048] A multi-band antenna can transmit RF signals in multiple frequency bands. It includes multiple oscillators, each corresponding to a frequency band (which can be understood as each oscillator being used to transmit RF signals in a single frequency band). A broadband antenna can transmit RF signals in multiple frequency bands. A broadband antenna includes a single oscillator, which is used to transmit RF signals in multiple frequency bands. Unless otherwise specified, the antennas mentioned in this application can be replaced by multi-band antennas or broadband antennas. This applies throughout the application.

[0049] 6. Frequency division duplex (FDD)

[0050] The physical channel for transmitting data signals from a mobile station to a base station, i.e., the channel used to receive (RX) data, is called the uplink; the physical channel for transmitting (TX) data from a base station to a mobile station, i.e., the channel used to transmit (TX) data, is called the downlink. In an FDD architecture, network equipment uses different frequencies for uplink and downlink transmissions. For downlink transmissions in an FDD architecture, network equipment supports only sending RF signals over a specific transmit frequency band or over two adjacent transmit frequency bands.

[0051] See Figure 1 , Figure 1This is a schematic diagram of a network device transmitting and receiving signals in an FDD architecture. The architecture includes a baseband processing chip 10, a radio on chip (ROC) 11, a downlink module (TX systema chip, TXSIP) 12, a power amplifier (PA) 13, a low noise amplifier (LNA) 14, a duplexer 15, and an antenna 16. The network device corresponds to multiple signal transmission frequency bands (such as Figure 1 fm0~fmn) and multiple signal receiving frequency bands (such as Figure 1 There is a one-to-one correspondence between the PA 13 and the signal transmission frequency band, there is a one-to-one correspondence between the LNA 14 and the signal reception frequency band, and there is a one-to-one correspondence between the duplexer 15 and the PA 13 (or LNA 14).

[0052] The baseband processing chip 10 includes but is not limited to a high-standard baseband processing unit (BBH), a low-standard baseband processing unit (Low standards) and an application-specific integrated circuit (ASIC). Figure 1 The feedback signal (FB) corresponds to the signal transmission frequency segment one-to-one. For example, the PA amplifies the signal transmission frequency segment fm0 and sends FB1 to the ROC. The PA amplifies the signal transmission frequency segment fm1 and sends FB2 to the ROC.

[0053] Exemplarily, when the RF signal sent by the network device to the terminal device is in the transmit frequency band fm1, the baseband processing chip 10 processes the baseband signal (including but not limited to encoding, multiplexing, filtering, and clipping) and sends the digital signal to the ROC 11. The ROC 11 converts the digital signal into an analog signal through a radio frequency digital to analog converter (RFDAC), and modulates the analog signal on the transmit frequency band fm1. Further, the ROC 11 sends the modulated analog signal to the TXSIP 12. The TXSIP 12 performs analog amplification on the PA 13 corresponding to the transmit frequency band fm1, and obtains a RF signal after filtering through the TX filter in the duplexer 15 connected to the PA 13 corresponding to the transmit frequency band fm1. Further, the RF signal is sent to the terminal device through the antenna 16.

[0054] When the network device receives a radio frequency signal from a terminal device in the receive frequency band RX1, the radio frequency signal transmitted by the terminal device is received by antenna 16. The RX filter in duplexer 15 (connected to LNA 14 corresponding to receive frequency band RX1) performs frequency selection filtering based on the signal receive frequency band of the network device. The filtered radio frequency signal is then amplified by LNA 14 corresponding to receive frequency band RX1. The amplified radio frequency signal then flows to ROC 11. ROC 11 converts the radio frequency signal into a digital signal via a radio frequency analog to digital converter (RFADC). Furthermore, ROC 11 sends the digital signal to baseband processing chip 10 for processing (including but not limited to sampling, decoding, and modulation).

[0055] Based on this, it can be seen that if the network equipment under the FDD architecture corresponds to two or more transmission frequency bands, when the downlink load of a certain transmission frequency band is large, and other transmission frequency bands are unloaded (no load) or lightly loaded (light load), the network equipment will still send data information to the terminal equipment in its service cell based on two or more transmission frequency bands, but this not only increases the system power consumption, but also reduces the frequency utilization.

[0056] This application provides a multi-frequency communication architecture. Figure 1 The RX filter included in the duplexer 15 is removed (or it can be understood that the duplexer 15 is changed to a TX filter), and a frequency selection switch is added to the communication architecture to control the frequency band of the antenna's RF signal, that is, it can be understood that the communication architecture is a transmitting module that is only used for sending (TX-only), and the downlink spectrum resources are pooled to support flexible and optional multi-frequency transmission. In a possible application scenario, in order to meet the uplink business of large amounts of data, multiple uplink frequency bands can also be integrated on the same network device through hardware. In this case, the network device can be regarded as a large uplink receiving module that is only used for receiving. In this scenario, the transmitting module that is only used for sending (TX-only) can cooperate with the large uplink receiving module to form a multi-frequency communication architecture with separated sending and receiving, making the networking of mobile communications more flexible.

[0057] The following further describes in detail the multi-frequency communication architecture provided in the embodiments of the present application:

[0058] See Figure 2 , Figure 2The present application provides a multi-frequency communication architecture, which includes a baseband processing chip 10, a ROC 11, a TXSIP 12, and a frequency-selective transmitting unit 13. The baseband processing chip 10 is connected to the ROC 11, the ROC 11 is connected to the TXSIP 12, and the TXSIP 12 is connected to the frequency-selective transmitting unit 13. The frequency-selective transmitting unit 13 includes multiple control transmitting modules, each of which corresponds to a frequency band, such as Figure 2 The control transmission module 0 corresponds to the frequency band fm0, the control transmission module 1 corresponds to the frequency band fm1, and the control transmission module n corresponds to the frequency band fmn.

[0059] The baseband processing chip 10 is configured to generate a frequency selection control signal (also known as a frequency channel change control signal (Freq-CC)) based on channel request information from a terminal device. It is also configured to send a digital signal to the ROC 11, as well as to send the frequency selection control signal to the ROC 11, the TXSIP 12, and the frequency selection transmission unit 13. The frequency selection control signal carries the identifier of the selected target frequency band. The ROC 11 is configured to set the transmission parameters corresponding to the target frequency band based on the frequency selection control signal. The transmission parameters include the local oscillator frequency and the sampling frequency. It is also configured to convert the digital signal into an analog signal and modulate the analog signal onto the target frequency band based on the transmission parameters. It is also configured to send the modulated analog signal to the TXSIP 12. TXSIP is used to send the modulated analog signal to the frequency-selective transmitting unit 13; the frequency-selective transmitting unit 13 is used to determine the target control transmitting module corresponding to the target frequency band from multiple control transmitting modules; connect the target control transmitting module and disconnect the control transmitting modules other than the target control transmitting module; process the modulated analog signal through the target control transmitting module to obtain a radio frequency signal, and transmit the radio frequency signal.

[0060] The number of the target frequency bands may be one or more, which is described in detail below in two cases.

[0061] Case 1: The number of target frequency bands is one

[0062] When the network device is unloaded, the channel request information includes the frequency band of the terminal device (which can be understood as the current working frequency band of the terminal device). When the frequency band of the terminal device is different from the working frequency band of the network device, the baseband processing chip 10 generates a frequency selection control signal according to the frequency band of the terminal device, that is, the identifier of the target frequency band carried in the frequency selection control signal is the identifier of the frequency band of the terminal device.

[0063] In the case where the network device is lightly loaded, the channel request information includes the frequency band corresponding to the terminal device. Furthermore, the baseband processing chip 10 determines a target frequency band from the multiple frequency bands corresponding to the multiple terminal devices; and generates a frequency selection control signal based on the target frequency band. For example, the terminal devices connected to the network device are: terminal device 1 and terminal device 2, wherein terminal device 1 corresponds to frequency band fm0, and terminal device 2 corresponds to frequency band fm1. In this case, the network device can determine one frequency band from frequency band fm0 and frequency band fm1 as the target frequency band. It should be noted that in this case, the method of determining the target frequency band can be randomly selected or determined according to a preset algorithm, and this solution does not specifically limit this.

[0064] For example, if the default operating frequency band of a communication system using this multi-band communication architecture is fm0, and the frequency band of the terminal device in the channel request information of the terminal device is fmn, the baseband processing chip 10 determines the frequency band fmn of the terminal device as the target frequency band and generates a frequency selection control signal. Furthermore, the baseband processing chip 10 sends the frequency selection control signal to the ROC 11, TXSIP 12, and the frequency selection transmitting unit 13, so that the operating parameters of the ROC 11, TXSIP 12, and the frequency selection transmitting unit 13 are adjusted and set according to the target frequency band fmn. The ROC 11 sets the transmission parameters (such as the local oscillator frequency and sampling frequency) corresponding to the target frequency band fmn according to the frequency selection control signal. The TXSIP 12 and the frequency selection transmitting unit 13 determine the control transmitting module n corresponding to the target frequency band fmn as the target control transmitting module according to the frequency selection control signal. The control transmitting module n is connected, and all control transmitting modules except the control transmitting module n are disconnected. The baseband processing chip 10 filters, clips, and processes the baseband signal to obtain a digital signal, and sends the digital signal to the ROC 11. The ROC 11 converts the digital signal into an analog signal, modulates the analog signal onto the target frequency band fmn according to the transmission parameters corresponding to the target frequency band fmn, and sends the modulated analog signal to the TXSIP 12. The TXSIP 12 sends the modulated analog signal to the control transmission module n in the frequency-selective transmission unit, so that the control transmission module n amplifies, attenuates, and filters the modulated analog signal to obtain a radio frequency signal of the target frequency band fmn, and controls the transmission module n to transmit the radio frequency signal of the target frequency band fmn.

[0065] Scenario 2: There are multiple target frequency bands (at least two)

[0066] The network device is not unloaded or lightly loaded. In this case, the channel request information includes the load status of the frequency band corresponding to the terminal device and each of the multiple frequency bands supported by the terminal device's corresponding operator. Furthermore, based on the load status of each frequency band, the baseband processing chip 10 determines at least two target frequency bands from the multiple frequency bands, where the load status of the target frequency bands is greater than a first value, and generates a frequency selection control signal based on the target frequency bands. The first value is preset based on the application scenario and can be adjusted accordingly based on the specific application scenario. This is not particularly limited.

[0067] In other words, all terminal devices within the service cell of the network device report their own operating frequency bands and the operator to which they belong (since the frequency bands supported by each operator are different, it can be understood as obtaining information on multiple frequency bands supported by the terminal device's corresponding operator). Furthermore, the network device determines the load status of each of the multiple frequency bands supported by the operator, and based on the load status of each of the multiple frequency bands supported by the operator, determines the frequency band with a load status greater than a first value (which can also be understood as greater than or equal to the first value) as the target frequency band.

[0068] Exemplarily, there are multiple terminal devices in the cell served by the network device, among which the channel request information reported by terminal device 1 is: the frequency band is fm0, and the frequency bands supported by the operator are fm0, fm1 and fm2; the channel request information reported by terminal device 2 is: the frequency band is fm1, and the frequency bands supported by the operator are fm0, fm1 and fm2; the channel request information reported by terminal device 3 is: the frequency band is fm2, and the frequency bands supported by the operator are fm0, fm1 and fm2. If the maximum number of terminal devices allowed in the fm0 frequency band is 6, and there are currently 4 terminal devices in the cell served by the network device, and the frequency band is fm0, then the load status of fm0 is calculated as 4 / 6, which is 66.7%; if the maximum number of terminal devices allowed in the fm1 frequency band is 6, and there are currently 3 terminal devices in the cell served by the network device, and the frequency band is fm1, then the load status of fm1 is calculated as 3 / 6, which is 50%; if the maximum number of terminal devices allowed in the fm2 frequency band is 6, and there are currently 2 terminal devices in the cell served by the network device, and the frequency band is fm2, then the load status of fm2 is calculated as 2 / 6, which is 33.3%. If the first value is 50%, the frequency band with a load status greater than or equal to 50% is determined as the target frequency band, that is, the operator's frequency bands fm0 and fm1 are determined as the target frequency bands, and the frequency selection control signal is generated based on fm0 and fm1.

[0069] In this case, in one possible implementation, if the target frequency band does not include the frequency band where the first terminal device is located, the baseband processing unit sends a frequency band switching instruction to the first terminal device, and the frequency band switching instruction is used to instruct the first terminal device to switch to the target frequency band.

[0070] For example, there are multiple terminal devices in the cell served by the network device, among which the channel request information reported by terminal device 1 is: the frequency band is fm0, and the frequency bands supported by the operator are fm0, fm1 and fm2; the channel request information reported by terminal device 2 is: the frequency band is fm1, and the frequency bands supported by the operator are fm0, fm1 and fm2; the channel request information reported by terminal device 3 is: the frequency band is fm2, and the frequency bands supported by the operator are fm0, fm1 and fm2. If the target frequency bands are fm0 and fm1, the terminal device 3 that is not in the target frequency band is the first terminal device. The baseband processing chip 10 sends a frequency band switching instruction to the terminal device 3, and the frequency band switching instruction can carry the identifier of the target frequency band, so that the terminal device 3 switches to the target frequency band (frequency band fm0 or frequency band fm1). The specific target frequency band to which the terminal device 3 switches among the multiple target frequency bands can be determined according to the algorithm of the terminal device or the load conditions of each target frequency band. Since it is not the main content of this solution, it will not be discussed in detail here.

[0071] In one possible implementation, there are at least two target frequency bands. The baseband processing chip includes multiple baseband processing units, each corresponding to a target frequency band. The baseband processing chip 10 is further configured to compensate for amplitude differences between the target frequency bands in the digital domain, and the ROC 11 is further configured to compensate for amplitude differences between the target frequency bands in the analog common channel. By implementing this possible implementation, the transmit power of each target frequency band is made uniform.

[0072] In other words, when there are at least two target frequency bands, the baseband processing chip 10 and the ROC 11 are further configured to adjust the amplitude values ​​of the baseband signals corresponding to the target frequency bands so that the amplitude values ​​of the target frequency bands are the same. The baseband processing chip 10 adjusts the amplitude values ​​of the baseband signals in the digital domain, and the ROC 11 adjusts the amplitude values ​​of the baseband signals in the analog common channel.

[0073] For example, there are two target frequency bands: target frequency band fm0 and target frequency band fm1. Baseband processing chip 10 includes baseband processing unit 0 and baseband processing unit 1, where baseband processing unit 0 corresponds to target frequency band fm0 and baseband processing unit 1 corresponds to target frequency band fm1. When the amplitude of baseband signal 0 corresponding to target frequency band 0 is 10 dB and the amplitude of baseband signal 1 corresponding to target frequency band 1 is 8 dB, the amplitude of baseband signal 0 can be adjusted to 9 dB, and the amplitude of baseband signal 1 can be adjusted to 9 dB.

[0074] Next, based on the specific composition structure of the frequency-selective transmitting unit, it is divided into the following three structures for detailed discussion.

[0075] Structure 1: The frequency-selective transmission unit includes a frequency-selective switch, multiple processing units, and an antenna. Each processing unit includes a PA and a filter. Figure 2 The control transmission module in the frequency-selective transmission unit 13 consists of a processing unit, a frequency-selective switch, and an antenna. In this communication architecture, the TXSIP is connected to the frequency-selective switch, which can control the connection or disconnection of multiple processing units, each of which is connected to an antenna.

[0076] For details, please see Figure 3 , Figure 3 This application provides another multi-band communication architecture, which includes a baseband processing chip 10, a ROC 11, a TXSIP 12, a frequency selection switch 13, multiple processing units 14, and an antenna 15. Each processing unit 13 includes a power amplifier and a filter. The baseband processing chip 10 is connected to the ROC 11, which is connected to the TXSIP 12. The TXSIP 12 is connected to one or more of the multiple processing units 14 via the frequency selection switch 13. The antenna 15 is connected to the multiple processing units via multiple feed ports. Each processing unit 14 corresponds to one feed port of the antenna 15.

[0077] exist Figure 3 In the illustrated multi-band communication architecture, the baseband processing chip 10 is configured to generate a frequency selection control signal (also known as a frequency channel change control signal (Freq-CC)) based on channel request information from a terminal device. The baseband processing chip 10 is configured to send a digital signal to the ROC 11, as well as to send the frequency selection control signal to the ROC 11, the TXSIP 12, and the frequency selection switch 13. The frequency selection control signal carries an identifier of the selected target frequency band. The ROC 11 is configured to set the transmission parameters corresponding to the target frequency band based on the frequency selection control signal, including the local oscillator frequency and the sampling frequency. The baseband processing chip 10 is configured to convert the digital signal into an analog signal and modulate the analog signal onto the target frequency band based on the transmission parameters. The baseband processing chip 10 is configured to send the modulated analog signal to the TXSIP 12. The TXSIP 12 is configured to connect the target processing unit corresponding to the target frequency band via the frequency selection switch 13, and to disconnect the processing units 14 other than the target processing unit. The baseband processing chip 10 is configured to send the modulated analog signal to the target processing unit. The target processing unit is used to process the modulated model signal to obtain a radio frequency signal of the target frequency band. The antenna 15 is used to transmit the radio frequency signal of the target frequency band.

[0078] If the antenna is a multi-frequency antenna with a coplanar design of multiple frequency planes fm0 to fmn (each frequency plane can be understood as corresponding to a frequency band), each frequency band in the multi-frequency antenna corresponds to a feeding port. Each feeding port of the multi-frequency antenna is connected to a processing unit 14.

[0079] In the case where the number of target frequency bands in the aforementioned scenario 1 is one, if the default operating frequency band of the communication system using the multi-frequency communication architecture is fm0, the frequency band of the terminal device in the channel request information of the terminal device is fmn. In this case, the baseband processing chip 10 determines the frequency band fmn in which the terminal device is located as the target frequency band and generates a frequency selection control signal. Furthermore, the baseband processing chip 10 sends the frequency selection control signal to the ROC 11, TXSIP 12, and the frequency selection switch 13, so that the operating parameters of the ROC 11, TXSIP 12, and the frequency selection switch 13 are adjusted and set according to the target frequency band fmn. Among them, the ROC 11 sets the transmission parameters (such as the local oscillator frequency and the sampling frequency) corresponding to the target frequency band fmn according to the frequency selection control signal, and the TXSIP 12 and the frequency selection switch 13 determine the target processing unit corresponding to the target frequency band fmn according to the frequency selection control signal, connects the target processing unit, and disconnects other processing units except the target processing unit. The baseband processing chip 10 obtains a digital signal after filtering, clipping, and other processing on the baseband signal, and sends the digital signal to the ROC 11; the ROC 11 converts the digital signal into an analog signal, modulates the analog signal on the target frequency band fmn according to the transmission parameters corresponding to the target frequency band fmn, and sends the modulated analog signal to the TXSIP 12; the TXSIP 12 sends the modulated analog signal to the target processing unit, so that the target processing unit amplifies, attenuates, and filters the modulated analog signal to obtain a radio frequency signal of the target frequency band fmn. Further, the radio frequency signal of the target frequency band fmn is transmitted through the multi-frequency antenna 15.

[0080] In the case where the number of target frequency bands in the aforementioned second scenario is at least two, if the number of target frequency bands is 2: target frequency band fm0 and target frequency band fm1. The baseband processing chip 10 includes a baseband processing unit 0 and a baseband processing unit 1, wherein the baseband processing unit 0 corresponds to the target frequency band fm0, and the baseband processing unit 1 corresponds to the target frequency band fm1. The antenna is a multi-frequency antenna with a coplanar design of multiple frequency planes fm0 to fmn (it can be understood that each frequency plane corresponds to a frequency band), and each frequency band in the multi-frequency antenna corresponds to a feeding port. Each feeding port of the multi-frequency antenna is connected to a processing unit 14. In this case, the baseband processing chip 10 generates a frequency selection control signal based on the target frequency band fm0 and the target frequency band fm1. Furthermore, the baseband processing chip 10 sends the frequency selection control signal to the ROC 11, the TXSIP 12 and the frequency selection switch 13, so that the ROC 11 sets the transmission parameters (such as local oscillator frequency and sampling frequency) corresponding to the target frequency band fm0 and the target frequency band fm1 according to the frequency selection control signal, and the TXSIP 12 and the frequency selection switch 13 determine the target processing unit corresponding to the target frequency band fm0 and the target processing unit corresponding to the target frequency band fm1 according to the frequency selection control signal, and connect the target processing unit corresponding to the target frequency band fm0 and the target processing unit corresponding to the target frequency band fm1, and disconnect other processing units except the target processing unit. The baseband processing chip 10 performs carrier-level combining on the two baseband signals to obtain a combined signal, and sends the combined signal to the ROC 11; the ROC 11 converts the combined signal into an analog signal, and modulates the analog signal on the target frequency band fm0 according to the transmission parameters corresponding to the target frequency band fm0, and modulates the analog signal on the target frequency band fm1 according to the transmission parameters corresponding to the target frequency band fm1, and sends the modulated analog signal to the TXSIP 12; the TXSIP 12 sends the modulated analog signal to the target processing unit corresponding to the target frequency band fm0 and the target processing unit corresponding to the target frequency band fm1, so that the target processing unit amplifies, attenuates and filters the modulated analog signal to obtain the target frequency bands: the RF signals of the target frequency band fm0 and the target frequency band fm1, and further transmits the RF signals of the target frequency band fm0 and the target frequency band fm1 through the multi-frequency antenna 15.

[0081] Scenario 2: The frequency-selective transmission unit includes an ultra-wideband PA, multiple filters, and an antenna. The ultra-wideband PA includes multiple amplification control units, each of which corresponds to a frequency band, and each of which corresponds to a frequency band. This can be understood as follows: Figure 2 The control transmission module in the frequency-selective transmission unit 13 consists of an amplification control unit, a filter, and an antenna in the ultra-wideband PA. In this multi-band communication architecture, the TXSIP is connected to the ultra-wideband PA, which is connected to multiple filters, and the antenna is connected to multiple filters.

[0082] For details, please see Figure 4 , Figure 4 Another multi-band communication architecture provided by the present application includes a baseband processing chip 10, a ROC 11, a TXSIP 12, an ultra-wideband PA 13, a filter 14, and an antenna 15. The baseband processing chip 10 is connected to the ROC 11, the ROC 11 is connected to the TXSIP 12, the TXSIP 12 is connected to the ultra-wideband PA 13, the ultra-wideband PA 13 is connected to multiple filters 14, and the antenna 15 is connected to multiple filters 14. The ultra-wideband PA includes multiple amplification control units, each of which corresponds to a frequency band, and each of which corresponds to a frequency band.

[0083] exist Figure 4 In the illustrated multi-band communication architecture, baseband processing chip 10 is configured to generate a frequency selection control signal based on channel request information from a terminal device. It is also configured to send a digital signal to ROC 11, as well as to send a frequency selection control signal to ROC 11, TXSIP 12, and ultra-wideband PA 13. The frequency selection control signal carries an identifier of the selected target frequency band. ROC 11 is configured to set transmission parameters corresponding to the target frequency band based on the frequency selection control signal, including the local oscillator frequency and sampling frequency. It is also configured to convert the digital signal into an analog signal and modulate the analog signal onto the target frequency band based on the transmission parameters. It is also configured to send the modulated analog signal to TXSIP 12. TXSIP 12 is configured to connect the target amplification control unit corresponding to the target frequency band in ultra-wideband PA 13 via a gate voltage control circuit, thereby shutting down all amplification control units in ultra-wideband PA 13 except the target amplification control unit. It is also configured to send the modulated analog signal to ultra-wideband PA 13. The ultra-wideband PA 13 is used to amplify the modulated analog signal through the target control unit and connect it to the filter corresponding to the target frequency band to process the modulated analog signal to obtain the RF signal of the target frequency band. The antenna 15 is used to transmit the RF signal of the target frequency band.

[0084] In the aforementioned scenario 1, when there is only one target frequency band, if the default operating frequency band of the communication system using this multi-band communication architecture is fm0, and the frequency band of the terminal device in the channel request information of the terminal device is fmn. In this case, the baseband processing chip 10 determines the frequency band fmn of the terminal device as the target frequency band and generates a frequency selection control signal. Furthermore, the baseband processing chip 10 sends the frequency selection control signal to the ROC 11, TXSIP 12, and ultra-wideband PA 13, so that the operating parameters of the ROC 11, TXSIP 12, and ultra-wideband PA 13 are adjusted and set according to the target frequency band fmn. Among them, ROC 11 sets the transmission parameters (such as local oscillator frequency and sampling frequency) corresponding to the target frequency band fmn according to the frequency selection control signal. TXSIP 12 and ultra-wideband PA 13 determine the target amplification control unit corresponding to the target frequency band fmn in the ultra-wideband PA 13 according to the frequency selection control signal, connect the target amplification control unit through the gate voltage circuit, and disconnect all amplification control units in the ultra-wideband PA 13 except the target amplification control unit. The baseband processing chip 10 filters, clips, and processes the baseband signal to obtain a digital signal, and sends the digital signal to the ROC 11. The ROC 11 converts the digital signal into an analog signal, modulates the analog signal onto the target frequency band fmn according to the transmission parameters corresponding to the target frequency band fmn, and sends the modulated analog signal to the TXSIP 12. The TXSIP 12 sends the modulated analog signal to the ultra-wideband PA 13, so that the ultra-wideband PA 13 amplifies the modulated analog signal through the target amplification control unit, attenuates and filters the analog signal through the filter 14 corresponding to the target frequency band, and obtains a radio frequency signal of the target frequency band fmn. The radio frequency signal of the target frequency band fmn is further transmitted through the antenna 15.

[0085] In the case where the number of target frequency bands in the aforementioned second scenario is at least two, if the number of target frequency bands is two: target frequency band fm0 and target frequency band fm1. The baseband processing chip 10 includes baseband processing unit 0 and baseband processing unit 1, wherein baseband processing unit 0 corresponds to target frequency band fm0 and baseband processing unit 1 corresponds to target frequency band fm1. The antenna is a broadband antenna, which is connected to multiple filters via a feed port. In this case, the baseband processing chip 10 generates a frequency selection control signal based on the target frequency band fm0 and the target frequency band fm1. Furthermore, the baseband processing chip 10 sends the frequency selection control signal to the ROC 11, TXSIP 12 and ultra-wideband PA 13, so that the ROC 11 sets the transmission parameters (such as local oscillator frequency and sampling frequency) corresponding to the target frequency band fm0 and the target frequency band fm1 according to the frequency selection control signal, and the TXSIP 12 and the ultra-wideband PA 13 determine the target amplification control unit corresponding to the target frequency band fm0 and the target amplification control unit corresponding to the target frequency band fm1 according to the frequency selection control signal, and connect the target amplification control unit corresponding to the target frequency band fm0 and the target amplification control unit corresponding to the target frequency band fm1 through the gate voltage circuit, and disconnect other amplification control units except the target amplification control unit. The baseband processing chip 10 performs carrier-level combining on the two baseband signals to obtain a combined signal, and sends the combined signal to the ROC 11; the ROC 11 converts the combined signal into an analog signal, and modulates the analog signal onto the target frequency band fm0 according to the transmission parameters corresponding to the target frequency band fm0, and modulates the analog signal onto the target frequency band fm1 according to the transmission parameters corresponding to the target frequency band fm1, and sends the modulated analog signal to the TXSIP 12; the TXSIP 12 sends the modulated analog signal to the ultra-wideband PA 13, so that the ultra-wideband PA 13 amplifies, attenuates, and filters the modulated analog signal through the target amplification control unit corresponding to the target frequency band fm0 and the target amplification control unit corresponding to the target frequency band fm1, to obtain the target frequency bands: the target frequency band fm0 and the target frequency band fm1 RF signals, and further transmits the target frequency band fm0 and the target frequency band fm1 RF signals through the broadband antenna 15.

[0086] Scenario 3: The frequency-selective transmission unit includes an ultra-wideband PA and a filter antenna. The ultra-wideband PA includes multiple amplification control units, each of which corresponds to a frequency band. Figure 2 The control and transmission module in the UWB PA consists of an amplification control unit and a filter antenna. In this multi-band communication architecture, the TXSIP is connected to the UWB PA, and the filter antenna is connected to the UWB PA through multiple feed ports;

[0087] For details, please see Figure 5 , Figure 5Another multi-band communication architecture provided by the present application includes a baseband processing chip 10, a ROC 11, a TXSIP 12, an ultra-wideband PA 13, and a filtering antenna 14, wherein the baseband processing chip 10 is connected to the ROC 11, the ROC 11 is connected to the TXSIP 12, the TXSIP 12 is connected to the ultra-wideband PA 13, and the filtering antenna 14 is connected to the ultra-wideband PA 13 through multiple feeding ports; wherein:

[0088] In such Figure 5 In the illustrated multi-band communication architecture, baseband processing chip 10 is configured to generate a frequency selection control signal based on channel request information from a terminal device. It is also configured to send a digital signal to ROC 11, as well as to send the frequency selection control signal to ROC 11, TXSIP 12, and ultra-wideband PA 13. The frequency selection control signal carries the identifier of the target frequency band. ROC 11 is configured to set transmit parameters corresponding to the target frequency band based on the frequency selection control signal, including the local oscillator frequency and sampling frequency. It is also configured to convert the digital signal into an analog signal and modulate the analog signal to the target frequency band based on the transmit parameters. It is also configured to send the modulated analog signal to TXSIP 12. TXSIP 12 is configured to activate the target amplification control unit corresponding to the target frequency band in ultra-wideband PA 13 through a gate voltage control circuit, and to deactivate all amplification control units in ultra-wideband PA 13 except the target amplification control unit. Ultra-wideband PA 13 processes the modulated model signal to obtain a radio frequency signal in the target frequency band. The filtering antenna 14 is configured to transmit the radio frequency signal in the target frequency band.

[0089] Among them, the filtering antenna 14 can transmit radio frequency signals in the frequency band fm0 to the frequency band fmn, and the filtering antenna 14 is connected to the ultra-wideband PA 13 through multiple feeding ports. The ultra-wideband PA 13 includes multiple amplification control units, each of which corresponds to a frequency band. The filtering antenna 14 includes multiple second processing units, each of which corresponds to a frequency band. The second processing unit includes an antenna element and a cavity filter.

[0090] In the aforementioned scenario 1, when there is only one target frequency band, if the default operating frequency band of the communication system using this multi-band communication architecture is fm0, and the frequency band of the terminal device in the channel request information of the terminal device is fmn. In this case, the baseband processing chip 10 determines the frequency band fmn of the terminal device as the target frequency band and generates a frequency selection control signal. Furthermore, the baseband processing chip 10 sends the frequency selection control signal to the ROC 11, TXSIP 12, and ultra-wideband PA 13, so that the operating parameters of the ROC 11, TXSIP 12, and ultra-wideband PA 13 are adjusted and set according to the target frequency band fmn. ROC 11 sets the transmission parameters (such as the local oscillator frequency and sampling frequency) corresponding to the target frequency band fmn based on the frequency selection control signal. TXSIP 12 and ultra-wideband PA 13 determine the target amplification control unit corresponding to the target frequency band fmn in ultra-wideband PA 13 based on the frequency selection control signal. The target amplification control unit is connected via a gate voltage circuit, while all other amplification control units in ultra-wideband PA 13 except the target amplification control unit are disconnected. Baseband processing chip 10 filters and clips the baseband signal to obtain a digital signal, which it transmits to ROC 11. ROC 11 converts the digital signal into an analog signal, modulates the analog signal onto the target frequency band fmn based on the transmission parameters corresponding to the target frequency band fmn, and transmits the modulated analog signal to TXSIP 12. TXSIP 12 transmits the modulated analog signal to ultra-wideband PA 13, which amplifies the modulated analog signal via the target amplification control unit. Furthermore, ultra-wideband PA 13 transmits the amplified analog signal to filtering antenna 14. The filtering antenna 14 transmits a radio frequency signal in the target frequency band fmn.

[0091] In the case where the number of target frequency bands in the aforementioned second scenario is at least two, if the number of target frequency bands is two: target frequency band fm0 and target frequency band fm1. The baseband processing chip 10 includes baseband processing unit 0 and baseband processing unit 1, wherein baseband processing unit 0 corresponds to target frequency band fm0 and baseband processing unit 1 corresponds to target frequency band fm1. The antenna is a broadband antenna, which is connected to multiple filters via a feed port. In this case, the baseband processing chip 10 generates a frequency selection control signal based on the target frequency band fm0 and the target frequency band fm1. Furthermore, the baseband processing chip 10 sends the frequency selection control signal to the ROC 11, TXSIP 12 and ultra-wideband PA 13, so that the ROC 11 sets the transmission parameters (such as local oscillator frequency and sampling frequency) corresponding to the target frequency band fm0 and the target frequency band fm1 according to the frequency selection control signal, and the TXSIP 12 and the ultra-wideband PA 13 determine the target amplification control unit corresponding to the target frequency band fm0 and the target amplification control unit corresponding to the target frequency band fm1 according to the frequency selection control signal, and connect the target amplification control unit corresponding to the target frequency band fm0 and the target amplification control unit corresponding to the target frequency band fm1 through the gate voltage circuit, and disconnect other amplification control units except the target amplification control unit. The baseband processing chip 10 performs carrier-level combining on the two baseband signals to obtain a combined signal, and sends the combined signal to the ROC 11; the ROC 11 converts the combined signal into an analog signal, and modulates the analog signal on the target frequency band fm0 according to the transmission parameters corresponding to the target frequency band fm0, and modulates the analog signal on the target frequency band fm1 according to the transmission parameters corresponding to the target frequency band fm1, and sends the modulated analog signal to the TXSIP 12; the TXSIP 12 sends the modulated analog signal to the ultra-wideband PA 13, so that the ultra-wideband PA 13 amplifies, attenuates, and filters the modulated analog signal through the target amplification control unit corresponding to the target frequency band fm0 and the target amplification control unit corresponding to the target frequency band fm1, to obtain the target frequency bands: the target frequency band fm0 and the target frequency band fm1 RF signals, and further transmits the target frequency band fm0 and the target frequency band fm1 RF signals through the filtering antenna 14.

[0092] This application also provides a signal transmission method, which is applied to network equipment and is suitable for application scenarios where the network equipment is lightly loaded or unloaded. Figure 6 , Figure 6 FIG. 1 is a flow chart of a signal transmission method. Figure 6 As shown, the signal transmission method includes S601 to S603. Figure 6 The execution subject of the method shown may be a network device, a chip or a chip system of the network device, etc. Figure 6 The following is an example of how a method is executed using a network device.

[0093] S601: The network device obtains frequency band information of a first frequency band in which a terminal device is located.

[0094] The network device receives channel request information from the terminal device, where the channel request information includes frequency band information of a first frequency band where the terminal device is located. The first frequency band can be understood as the working frequency band of the terminal device when sending the channel request information.

[0095] S602: When the first frequency band is equal to the second frequency band corresponding to the network device, the network device sends a radio frequency signal based on the second frequency band.

[0096] The second frequency band corresponding to the network device can be understood as the operating frequency band in which the network device currently transmits RF signals. The network device determines whether the first frequency band corresponding to the terminal device is equal to the second frequency band corresponding to the network device. If the first frequency band is equal to the second frequency band, the network device transmits RF signals based on the second frequency band. This means that the network device does not change the operating frequency band in which it currently transmits RF signals.

[0097] S603: When the first frequency band is not equal to the second frequency band corresponding to the network device, the network device sends a radio frequency signal based on the first frequency band.

[0098] When the first frequency band is not equal to the second frequency band, the network device sends the radio frequency signal based on the first frequency band, which can be understood as the network device changing the current working frequency band of the radio frequency signal, and the network device switches the current working frequency band of the radio frequency signal to the frequency band corresponding to the terminal device.

[0099] This application also provides another signal transmission method, which is applied to network equipment and is suitable for application scenarios where the network equipment has a large load. Figure 7 , Figure 7 FIG. 1 is a flow chart of a signal transmission method. Figure 7 As shown, the signal transmission method includes S701 to S703. Figure 7 The execution subject of the method shown may be a network device, a chip or a chip system of the network device, etc. Figure 7 The following is an example of how a method is executed using a network device.

[0100] S701. The network device obtains frequency band information of a terminal device in a service cell.

[0101] The network device receives channel request information from all terminal devices in its service cell, where the channel request information includes frequency band information of the terminal device and frequency band information supported by the operator corresponding to the terminal device.

[0102] Exemplarily, the cell served by the network device includes terminal device 1, terminal device 2, and terminal device 3. The channel request information reported by terminal device 1 is: the frequency band is fm0, and the frequency bands supported by the operator are fm0, fm1, and fm2; the channel request information reported by terminal device 2 is: the frequency band is fm1, and the frequency bands supported by the operator are fm0, fm1, and fm2; the channel request information reported by terminal device 3 is: the frequency band is fm2, and the frequency bands supported by the operator are fm0, fm1, and fm2.

[0103] S702. The network device determines at least two target frequency bands based on the frequency band information of the terminal device in the serving cell.

[0104] The network device collects statistics on the load status of each frequency band in the frequency band information supported by the operator, and determines at least two target frequency bands according to the load status of each frequency band.

[0105] Exemplarily, there are multiple terminal devices in the cell served by the network device, among which the channel request information reported by terminal device 1 is: the frequency band is fm0, and the frequency bands supported by the operator are fm0, fm1 and fm2; the channel request information reported by terminal device 2 is: the frequency band is fm1, and the frequency bands supported by the operator are fm0, fm1 and fm2; the channel request information reported by terminal device 3 is: the frequency band is fm2, and the frequency bands supported by the operator are fm0, fm1 and fm2. If the maximum number of terminal devices allowed in the frequency band fm0 is 6, and there are currently 4 terminal devices in the cell served by the network device, and the frequency band is fm0, then the load status of fm0 is calculated as 4 / 6, which is 66.7%; if the maximum number of terminal devices allowed in the frequency band fm1 is 6, and there are currently 3 terminal devices in the cell served by the network device, and the frequency band is fm1, then the load status of fm1 is calculated as 3 / 6, which is 50%; if the maximum number of terminal devices allowed in the frequency band fm2 is 6, and there are currently 2 terminal devices in the cell served by the network device, and the frequency band is fm2, then the load status of fm2 is calculated as 2 / 6, which is 33.3%. The network device determines the frequency band with a load status greater than or equal to a first value as the target frequency band. In this case, if the first value is 50%, the network device determines the frequency band with a load status greater than or equal to 50% as the target frequency band. In other words, the operator's frequency bands fm0 and fm1 are determined as the target frequency bands, and generates a frequency selection control signal based on fm0 and fm1.

[0106] S703: The network device sends a radio frequency signal based on the at least two target frequency bands.

[0107] In one possible implementation, if the target frequency band does not include the frequency band where the first terminal device is located, the network device sends a frequency band switching instruction to the first terminal device, where the frequency band switching instruction is used to instruct the first terminal device to switch to the target frequency band.

[0108] Exemplarily, there are multiple terminal devices in the cell served by the network device, among which the channel request information reported by terminal device 1 is: the frequency band is fm0, and the frequency bands supported by the operator are fm0, fm1 and fm2; the channel request information reported by terminal device 2 is: the frequency band is fm1, and the frequency bands supported by the operator are fm0, fm1 and fm2; the channel request information reported by terminal device 3 is: the frequency band is fm2, and the frequency bands supported by the operator are fm0, fm1 and fm2. If the target frequency bands are fm0 and fm1, the terminal device 3 that is not in the target frequency band is the first terminal device. The network device sends a frequency band switching instruction to terminal device 3, and the frequency band switching instruction can carry the identifier of the target frequency band, so that terminal device 3 switches to the target frequency band (frequency band fm0 or frequency band fm1). Specifically, which target frequency band the terminal device 3 switches to among the multiple target frequency bands can be determined based on the algorithm of the terminal device or the load conditions of each target frequency band. This is not the main content of this solution and will not be discussed in detail here.

[0109] It should be noted that for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

[0110] The descriptions of the various embodiments provided in this application can refer to each other. The descriptions of each embodiment have their own focus. For parts not described in detail in a particular embodiment, please refer to the relevant descriptions of other embodiments. For the convenience and brevity of description, for example, the functions and execution steps of the various devices and equipment provided in the embodiments of this application can refer to the relevant descriptions of the method embodiments of this application. The various method embodiments and the various device embodiments can also refer to, be combined with, or quote each other.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-frequency communication system, characterized in that: The system is applied to network equipment, and includes a baseband processing chip, a radio frequency integrated circuit (ROC), a downlink module (TXSIP), and a frequency-selective transmitting unit. The baseband processing chip is connected to the ROC, the ROC is connected to the TXSIP, and the TXSIP is connected to the frequency-selective transmitting unit. The frequency-selective transmitting unit includes multiple control transmitting modules, each of which corresponds to a frequency band. The baseband processing chip is configured to generate a frequency selection control signal based on channel request information from the terminal device; further configured to send a digital signal to the ROC, and to send the frequency selection control signal to the ROC, the TXSIP, and the frequency selection transmitting unit; the frequency selection control signal carries an identifier of a selected target frequency band; the target frequency band is determined based on a load status of each of a plurality of frequency bands supported by an operator corresponding to the terminal device; The ROC is configured to set transmission parameters corresponding to the target frequency band according to the frequency selection control signal, wherein the transmission parameters include a local oscillator frequency and a sampling frequency; convert the digital signal into an analog signal, and modulate the analog signal onto the target frequency band according to the transmission parameters; and transmit the modulated analog signal to the TXSIP; The TXSIP is configured to send the modulated analog signal to the frequency-selective transmitting unit; The frequency selection transmitting unit is used to determine the target control transmitting module corresponding to the target frequency band from the multiple control transmitting modules; connect the target control transmitting module and disconnect the control transmitting modules other than the target control transmitting module; process the modulated analog signal through the target control transmitting module to obtain a radio frequency signal, and transmit the radio frequency signal.

2. The system according to claim 1, characterized in that The frequency-selective transmission unit includes a frequency-selective switch, multiple processing units, and an antenna, each processing unit including a power amplifier PA and a filter; the control transmission module is composed of a processing unit, the frequency-selective switch, and the antenna; the TXSIP is connected to the frequency-selective switch; wherein: The frequency selection switch is used to connect the target processing unit corresponding to the target frequency band based on the frequency selection control signal, and disconnect the processing units other than the target processing unit among the multiple processing units; and is also used to receive the modulated analog signal from the TXSIP and send the modulated analog signal to the target processing unit; The target processing unit is used to process the modulated analog signal to obtain a radio frequency signal of a target frequency band; The antenna is used to transmit the radio frequency signal of the target frequency band.

3. The system according to claim 1, characterized in that The frequency-selective transmission unit includes an ultra-wideband power amplifier (PA), multiple filters, and an antenna; the TXSIP is connected to the ultra-wideband PA, the ultra-wideband PA is connected to the multiple filters, and the antenna is connected to the multiple filters; the ultra-wideband PA includes multiple amplification control units, each amplification control unit corresponds to a frequency band, and each filter corresponds to a frequency band; the control transmission module is composed of an amplification control unit, a filter, and an antenna in the ultra-wideband PA; wherein: The ultra-wideband PA is configured to connect the target amplification control unit corresponding to the target frequency band in the ultra-wideband PA through a gate voltage control circuit, and disconnect the amplification control units in the ultra-wideband PA other than the target amplification control unit; is further configured to receive the modulated analog signal from the TXSIP; is further configured to amplify the modulated analog signal through the target amplification control unit, connect the filter corresponding to the target frequency band, and process the modulated analog signal to obtain a radio frequency signal in the target frequency band; The antenna is used to transmit the radio frequency signal of the target frequency band.

4. The system according to claim 1, characterized in that The frequency-selective transmission unit includes an ultra-wideband power amplifier (PA) and a filter antenna. The ultra-wideband PA includes multiple amplification control units, each corresponding to a frequency band. The control transmission module is composed of an amplification control unit and a filter antenna in the ultra-wideband PA. The TXSIP is connected to the ultra-wideband PA, and the filter antenna is connected to the ultra-wideband PA via multiple feeding ports. The ultra-wideband PA is configured to enable a target amplification control unit corresponding to the target frequency band in the ultra-wideband PA through a gate voltage control circuit, and to disconnect amplification control units other than the target amplification control unit in the ultra-wideband PA; and is further configured to receive the modulated analog signal from the TXSIP; and to process the modulated analog signal through the target amplification control unit to obtain a radio frequency signal of the target frequency band. The filtering antenna is used to transmit the radio frequency signal of the target frequency band.

5. The system according to any one of claims 1 to 4, characterized in that: The channel request information includes the frequency band of the terminal device; The baseband processing chip generates a frequency selection control signal according to the channel request information from the terminal device, including: In the case where the frequency band of the terminal device is different from the working frequency band of the network device, a frequency selection control signal is generated according to the frequency band of the terminal device, and the target frequency band is the frequency band of the terminal device.

6. The system according to any one of claims 1 to 4, characterized in that: The number of the target frequency bands is at least two, the baseband processing chip includes multiple baseband processing units, each baseband processing unit corresponds to a target frequency band, The baseband processing chip is further used to compensate for the amplitude difference between each target frequency band in the digital domain; The ROC is also used to compensate for the amplitude difference between various target frequency bands in the simulated common channel.

7. The system according to claim 6, characterized in that The channel request information includes the frequency band where the terminal device is located and the load status of each frequency band among the multiple frequency bands supported by the operator corresponding to the terminal device; The baseband processing chip is used to generate a frequency selection control signal according to the channel request information from the terminal device, including: determining at least two target frequency bands from the plurality of frequency bands based on the load status of each frequency band, wherein the load status of the target frequency bands is greater than a first value; Based on the target frequency band, a frequency selection control signal is generated.

8. The system according to claim 7, characterized in that: The baseband processing chip is further used for: If the target frequency band does not include the frequency band in which the first terminal device is located, a frequency band switching instruction is sent to the first terminal device, where the frequency band switching instruction is used to instruct the first terminal device to switch to the target frequency band.

Images