CN104469991B

CN104469991B - The method and device of wireless telecommunications

Info

Publication number: CN104469991B
Application number: CN201410678071.7A
Authority: CN
Inventors: 张书; 孙建超
Original assignee: Baicells Technologies Co Ltd
Current assignee: Baicells Technologies Co Ltd
Priority date: 2014-11-21
Filing date: 2014-11-21
Publication date: 2018-01-16
Anticipated expiration: 2034-11-21
Also published as: CN104469991A

Abstract

The invention discloses a kind of method and device of wireless telecommunications.Wherein, this method includes：Frequency mixer is set between the communication chip and duplexer of terminal, and frequency mixer receives the first band radiofrequency signal generated by communication chip transitional information stream；First band radiofrequency signal is carried out frequency modulation processing by frequency mixer, obtains the second band radiofrequency signal after frequency modulation processing；Frequency mixer sends second band radiofrequency signal to duplexer；Or frequency mixer receives the 3rd band radio frequencies signal received by duplexer by antenna；3rd band radio frequencies signal is carried out frequency modulation processing by frequency mixer, obtains the 4th band radio frequencies signal；4th band radio frequencies signal is sent to communication chip by frequency mixer.The present invention solves in the prior art the problem of communication chip can not adjust working band as needed, result in the need for working band customization global communication chip as needed.

Description

Wireless communication method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for wireless communications.

Background

In a mobile communication system, a User Equipment (also referred to as UE, User Equipment or UT, User Terminal, etc.) transmits to a communication base station (3G network communication base station, multi-system network communication base station, Node B, evolved Node B, EvolvedNode B, etc.) or the communication Terminal receives a radio signal in a certain frequency band from the communication base station, thereby implementing radio communication.

The partial structure of the terminal is shown in fig. 1. The baseband processor performs baseband processing on the information source stream to be transmitted to generate a baseband signal supporting a communication protocol, and the radio frequency transceiver converts the received baseband signal into a radio frequency signal, so as to implement spectrum shifting (for example, shifting the baseband signal to a frequency band near 1800MHz or/2600 MHz), and then modulates the radio signal to a specific frequency band for communication. Similarly, the radio frequency transceiver demodulates the received radio frequency signal in the specific frequency band to generate a baseband signal, and provides the baseband signal to the baseband processor for processing, and restores the information source information to realize communication.

In the prior art, what frequency band of wireless communication can be supported by the terminal depends on the frequency modulation capability of the communication chip in the terminal. Therefore, for a frequency band with huge market demand, the communication chip corresponding to the frequency band is mature in technology and cheap in manufacturing cost, for example, the communication chip corresponding to a 3G system (adopting a wideband code division multiple access WCDMA communication protocol) which works near 900MHz and 1800MHz frequency bands is cheap and excellent in quality; the same is true for the terminal chip corresponding to the 4G system (using the LTE communication protocol) operating around the 2600MHz band. However, for frequency bands with smaller market demands, the corresponding terminal chips are often customized, which results in higher cost of terminals used in some private networks, even no production line provides similar products, such as private networks for public security, fire protection, coal mine, etc., using frequency bands different from the frequency bands for civil use, such as 1400MHz frequency bands. Currently, few communication chips are capable of supporting the LTE communication protocol running on these specific frequency bands. Such chips can only be customized to communication chip manufacturers, such as, for example, the united states of america, taiwan co-generation technologies, ltd. Therefore, on one hand, the cost of the terminal is very high, and on the other hand, mobile chip manufacturers need to build special production lines or enlarge mass production capacity according to requirements, so that a lot of time is consumed, and the mobile chip manufacturers cannot respond to the market quickly.

Aiming at the problem that the communication chip in the prior art can not adjust the working frequency band as required, and the whole communication chip is required to be customized according to the required working frequency band, an effective solution is not provided at present.

Disclosure of Invention

The present invention is directed to a method and an apparatus for wireless communication, so as to solve the problem that a communication chip in the prior art cannot adjust a working frequency band as required, so that the whole communication chip needs to be customized according to the required working frequency band.

To achieve the above object, according to an aspect of an embodiment of the present invention, a method of wireless communication is provided. The method comprises the following steps: a mixer is arranged between a communication chip of a terminal and a duplexer, and receives a first frequency band radio frequency signal generated by converting information flow through the communication chip; the frequency mixer carries out frequency modulation processing on the first frequency band radio frequency signal to obtain a second frequency band radio frequency signal after the frequency modulation processing; the mixer sends the second frequency band radio frequency signal to the duplexer; or the mixer receives a third-band radio-frequency signal received by the duplexer through the antenna; the frequency mixer performs frequency modulation processing on the third frequency band radio-frequency signal to obtain a fourth frequency band radio-frequency signal; the mixer transmits the fourth frequency band radio frequency signal to the communication chip.

In order to achieve the above object, according to another aspect of embodiments of the present invention, there is provided an apparatus for wireless communication, including a mixer disposed between a communication chip of the terminal and a duplexer; the frequency mixer is used for receiving a first frequency band radio frequency signal generated by converting an information stream through a communication chip; the frequency mixer carries out frequency modulation processing on the first frequency band radio frequency signal to obtain a second frequency band radio frequency signal after frequency modulation processing; finally, the mixer sends the second frequency band radio frequency signal to the duplexer; or the mixer is used for receiving a third-band radio-frequency signal received by the duplexer through the antenna; the frequency mixer performs frequency modulation processing on the third frequency band radio-frequency signal to obtain a fourth frequency band radio-frequency signal; and finally, the mixer transmits the fourth frequency band radio frequency signal to the communication chip.

According to the embodiment of the invention, a mixer is arranged between a communication chip of a terminal and a duplexer, and the mixer receives a first frequency band radio frequency signal generated by converting an information stream through the communication chip; the frequency mixer carries out frequency modulation processing on the first frequency band radio frequency signal to obtain a second frequency band radio frequency signal after the frequency modulation processing; the mixer sends the second frequency band radio frequency signal to the duplexer; or the mixer receives a third-band radio-frequency signal received by the duplexer through the antenna; the frequency mixer performs frequency modulation processing on the third frequency band radio-frequency signal to obtain a fourth frequency band radio-frequency signal; the mixer transmits the fourth frequency band radio frequency signal to the communication chip, and the problem that the communication chip in the prior art cannot adjust the working frequency band as required, so that the whole communication chip is required to be customized according to the required working frequency band is solved. The effect that the frequency of the radio-frequency signal generated by the standard communication chip can be modulated to the designated frequency through the frequency mixer and communication is carried out at the designated frequency is achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram of a wireless communication device in the prior art;

fig. 2 is a schematic structural diagram of a wireless communication device according to a first embodiment of the invention;

FIG. 3 is a schematic diagram of an alternative wireless communication device according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of an alternative wireless communication device according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an alternative wireless communication device according to an embodiment of the present invention;

FIG. 6 is a block diagram of an alternative wireless communication device according to an embodiment of the present invention;

FIG. 7 is a block diagram of an alternative wireless communication device according to an embodiment of the present invention;

FIG. 8 is a block diagram of an alternative wireless communication device according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of an alternative wireless communication device according to an embodiment of the present invention;

FIG. 10 is a block diagram of an alternative wireless communication device according to an embodiment of the present invention;

FIG. 11 is a block diagram of an alternative wireless communication device according to an embodiment of the present invention;

FIG. 12 is a block diagram of an alternative wireless communication device according to an embodiment of the present invention;

FIG. 13 is a block diagram of an alternative wireless communication device according to an embodiment of the present invention;

FIG. 14 is a block diagram of an alternative wireless communication device according to an embodiment of the present invention;

FIG. 15 is a block diagram of an alternative wireless communication device according to an embodiment of the present invention;

FIG. 16 is a block diagram of an alternative wireless communication device according to an embodiment of the present invention; and

fig. 17a and 17b are flowcharts of a wireless communication method according to a second embodiment of the invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example 1

An embodiment of the present invention also provides a wireless communication device, as shown in fig. 2, which may include a communication chip 20 and a duplexer 22, and a mixer 24 disposed between the communication chip 20 and the duplexer 22,

the mixer 24 is configured to receive a first frequency band radio frequency signal generated by converting an information stream through the communication chip 20, perform frequency modulation processing on the first frequency band radio frequency signal by the mixer 24 to obtain a second frequency band radio frequency signal after the frequency modulation processing, and finally send the second frequency band radio frequency signal to the duplexer 22 by the mixer 24.

Specifically, in the process of sending a signal by the terminal, the radio frequency transceiver included in the communication chip acquires a baseband signal from the baseband processor, and modulates the baseband signal to a first frequency band to generate a first frequency band radio frequency signal. The mixer is used for receiving a first frequency band radio frequency signal, modulating the signal to a second frequency band to generate a second frequency band radio frequency signal, and finally sending the second frequency band radio frequency signal through the antenna, wherein the first frequency band radio frequency signal is generated by the radio frequency transceiver according to the obtained baseband signal, and the radio frequency transceiver does not have the capability of directly generating the second frequency band radio frequency signal carried in the second frequency band.

Or,

mixer 24 receives a third band radio frequency signal received by duplexer 22 via an antenna; the frequency mixer 24 performs frequency modulation processing on the third frequency band radio-frequency signal to obtain a fourth frequency band radio-frequency signal; finally, the mixer 24 transmits the fourth band rf signal to the communication chip 20.

Specifically, in the process of receiving the signal by the terminal, the mixer is configured to obtain a third band radio frequency signal from the antenna and carried in a third band, modulate the third band radio frequency signal to a fourth band to generate a fourth band radio frequency signal, and demodulate the fourth band radio frequency signal by a radio frequency transceiver included in the communication chip to generate a baseband signal, where the radio frequency transceiver does not have a capability of directly processing the third band radio frequency signal carried in the third band.

In practical applications, the present invention can be applied to a terminal. The terminal of the invention, which can be a mobile phone (or handset), or other equipment capable of sending or receiving wireless signals, includes: personal Digital Assistants (PDAs), wireless modems, wireless communicators, handheld communicators, laptop computers, cordless telephones, Customer Premises Equipment (CPE) or Mifi capable of converting mobile signals to wifi signals, smart appliances, or other devices that can autonomously communicate with a mobile communication network without human operation, etc. The communication chip comprises a baseband processor and a radio frequency transceiver, and the baseband processor and the radio frequency transceiver can be independent chips. Of course, the mixer and the duplexer can be integrated together to reduce the occupied space and make the layout of the circuit more convenient.

Further, the communication chip can only transmit a first band rf signal or receive a fourth band rf signal, where the first band and the fourth band used by the first band rf signal and the fourth band rf signal are authorized (Licensed) wireless communication bands, and the third band and the second band used by the third band rf signal and the second band rf signal are unauthorized (Unlicensed) wireless communication bands.

Specifically, the invention can convert the radio frequency signal on a certain frequency band generated by the communication chip in the existing terminal to a frequency band which is not supported by another radio frequency transceiver or the communication chip through a frequency mixing method. Thus, the terminal can work in any frequency band only by adjusting the mixer. The first band rf signal and the fourth band rf signal may be rf signals in the same frequency band (e.g., TDD, time division Duplexing system) or rf signals in different frequency bands (e.g., FDD, frequency division Duplexing system) according to a duplex technology used by the communication technology.

In practical applications, the communication standard used by the communication base station IS not limited, and may be WCDMA (Wideband Code Division Multiple Access, Wideband CDMA), CDMA2000(IS-2000 standard Code Division Multiple Access, CDMA Multiple Access2000), WiMAX (Worldwide Interoperability for microwave Access), LTE (Long-Term Evolution), LTE-Advanced (further Evolution of LTE), and the like. Since the communication standards used by the terminals are different, the terminals operate in authorized mobile communication bands corresponding to the respective communication standards. If the communication chip working on the unauthorized mobile communication frequency band is needed, the communication chip needs to be individually customized according to the requirement by a manufacturer of the communication chip, so that the development period is long, the mass production cannot be realized due to small requirement, and the cost is often higher. The method of the invention can realize wireless communication on a specific frequency band quickly and low cost because the baseband processor and the radio frequency transceiver are generally produced in mass and have low price and the development of the mixer is mature.

The terminal comprises at least one antenna connected with the duplexer, and for a Frequency Division Duplex (FDD) system, signals transmitted and received by the terminal work in different frequency bands, and the duplexer ensures that the signals can be transmitted and received at the same time and normally work. For a Time Division Duplex (TDD) system, the signal transmitted by the terminal and the received signal are carried in the same frequency band but operate at different times, and the duplexer is actually a radio frequency switch capable of supporting the terminal to switch between transmitting signals or receiving signals at different times.

A band represents a contiguous segment of frequency, and for a Time Division Duplex (TDD) system, uplink and downlink transmissions use the same band, and thus are the same for both uplink and downlink regardless of the first band and the fourth band, or the second band and the third band, and typically a segment of a band is named or numbered as a band. For a Frequency Division Duplex (FDD) system, uplink and downlink transmissions use different frequency bands, that is, a first frequency band corresponding to the uplink transmission and a fourth frequency band corresponding to the downlink transmission in the embodiment of the present invention are different, and a second frequency band corresponding to the uplink transmission and a third frequency band corresponding to the downlink transmission are different, but they are also numbered or named as the same frequency band in pairs. For example, the following table shows four frequency bands, numbered 1, 22, 38, 41 respectively, defined by 3GPP in the LTE standard specification, as shown in table 1. For Time Division Duplex (TDD), the first and fourth frequency bands may be frequency bands corresponding to band 38 (2570 MHz-2620 MHz), the second and third frequency bands may be frequency bands corresponding to band 41 (2496 MHz-2690 MHz), and both uplink and downlink use the same frequency band. For a Frequency Division Duplex (FDD) system, the uplink and downlink are different for the same numbered frequency band, for example, the frequency band 22 includes an uplink frequency band and a downlink frequency band, which indicates 1920MHz-1980MHz for the transmission process in fig. 2, and indicates 2110MHz-2170MHz for the reception process, and only when the uplink frequency band of the first frequency band is mentioned, the 1920MHz-1980MHz is indicated exclusively; in the present invention, the first frequency band and the fourth frequency band may be frequency bands corresponding to frequency band 1, which correspond to 1920MHz-1980MHz and 2110MHz-2170MHz, respectively, for the terminal; the second and third frequency bands may be frequency bands corresponding to frequency band 22, which correspondingly correspond to 3410 MHz-3490 MHz and 3510 MHz-3590 MHz, respectively.

TABLE 1

The present invention does not limit the first frequency band, the second frequency band, the third frequency band, and the fourth frequency band, which are all frequency bands usable for wireless communication.

The method provided by the invention can convert the commercial chip to any specific frequency band, and can easily realize the terminal working on the frequency band under the condition that a chip manufacturer does not develop a special chip for the specific frequency band.

Here, further to the practical explanation, if the first frequency band and the fourth frequency band are Licensed (Licensed) frequency bands for mobile communication, the second frequency band and the third frequency band are Unlicensed (Unlicensed) frequency bands for mobile communication. For example, the first frequency band and the fourth frequency band are frequency bands around 1.8GHz (for example: 1880-1900MHz), frequency bands around 2.3GHz (for example: 2320-2370MHz) or frequency bands around 2.6GHz (for example, 2575-2635MHz), which are already allocated to one or more mobile communication operators, and corresponding commercial communication chips are mature, so that the frequency bands are called Licensed (Licensed); the second frequency band and the third frequency band are, for example, a frequency band around 2.4GHz (e.g., 2420-2483 MHz), a frequency band around 3.5GHz (e.g., 3550-3650MHz), a frequency band around 5.1GHz (e.g., 5150-5350MHz), or a frequency band around 5.8GHz (e.g., 5725-5850MHz), and the like, which are Unlicensed (Unlicensed) frequency bands, which can be freely used by more operators or the public, have a rich frequency spectrum, but are currently used less frequently. The method in the embodiment can convert the authorized frequency band (Licensed) generated by the commercial communication chip to any unauthorized frequency band (Unlicensed), and can easily realize the terminal which can enable the commercial communication chip only generating the radio frequency signal of the authorized frequency band to work on the Unlicensed frequency band under the condition that a chip manufacturer does not develop a special chip of the unauthorized frequency band.

In particular, the existing wireless communication includes wireless communication performed on licensed (licensed) frequency band and Unlicensed (Unlicensed) frequency band. Now using licensed (licensed) frequency bands, wireless communication is performed over the licensed (licensed) frequency bands, for example: mobile communication operators, such as china mobile and china unicom, etc., use frequency bands occupied by mobile communication operators in wireless communication, which are used by a certain mobile communication operator (hereinafter referred to as an operator) alone, and the operators manage and optimize resources of the frequency bands, for example, in an optimization manner: the density, transmission power, antenna tilt angle, etc. of the access devices operating in the frequency band are controlled, thereby ensuring reliability and effectiveness of wireless communication services provided in the frequency band. There are many wireless communications over Unlicensed (Unlicensed) frequency bands, such as those used for WLAN, which can be used by anyone for transmission of wireless communications.

Further, the communication chip processes the first band radio frequency signal and/or the fourth band radio frequency signal by a carrier aggregation technology, wherein the carrier aggregation technology is used for aggregating a plurality of band radio frequency signals together for wireless transmission.

Specifically, Carrier Aggregation (CA) technology can support Aggregation of multiple frequency bands for wireless transmission, for example, a system using LTE Release8 communication protocol supports only 20MHz frequency band, and transmission rate and available resources are limited; a system using the LTE Release10 communication protocol can support up to 5 frequency bands, that is, a frequency band supporting 5 × 20MHz to 100MHz at maximum, and a specific method is to aggregate 5 frequency bands together for use, where one frequency band is called a Primary Component Carrier (PCC) or a Primary Component Carrier for short, and is used for transmitting control information and data information; the other carriers are called Secondary Component Carriers (SCCs) or simply secondary carriers, and are used only for transmitting data information. In the prior art, in order to ensure coverage and transmission quality of control information, a main carrier is generally designed as a Licensed (Licensed) frequency band for mobile communication, and a frequency band for data transmission is designed as an Unlicensed (Unlicensed) frequency band for mobile communication, which results in that at least one Licensed (Licensed) frequency band for mobile communication must be owned in order to be able to operate using existing chips and products (only supporting information transmission of the main carrier operating on the Licensed frequency band for mobile communication), resulting in limitations on service innovation and cost.

In the invention, a method for using frequency mixing for a main carrier is provided, so that the limitation that a chip in the existing system can only support a Licensed (Licensed) frequency band of mobile communication for the main carrier can be broken through, so that business innovation can be supported by using the existing chip and products, for example, a frequency band near 5.8GHz can be opened for business innovation of operation in the future, each operator can use the frequency band for wireless communication at no charge, so that the operator can use the Unlicensed (Unlicensed) frequency band of mobile communication for the main carrier to directly build a network, so that the emerging wireless communication network can be built quickly without waiting for the maturity of a special chip of the frequency band, and the mode also reduces the cost for the operator to purchase frequency spectrum.

Preferably, as shown in fig. 3, in an alternative embodiment provided by the present application, the communication chip 20 includes: a baseband processor 201 and a radio frequency transceiver 203.

The baseband processor 201 is configured to convert an information stream into a baseband signal, or convert a baseband signal into an information stream.

The rf transceiver 203 is configured to convert a baseband signal into a first band rf signal or convert a fourth band rf signal into a baseband signal.

In particular, the baseband processor and the radio frequency transceiver may be separate chips or integrated in one chip. The baseband processor is mainly used for interconversion between information streams and baseband signals, and the radio frequency transceiver is mainly used for interconversion between baseband signals and radio frequency signals.

In the prior art, a baseband Processor is used to convert an information stream into a baseband signal according to a communication protocol, and the baseband Processor is usually integrated with an Application Processor to be a baseband Application Processor BB (baseband) or AP (Application Processor).

Preferably, as shown in fig. 4, in an alternative embodiment provided by the present application, between the mixer 24 and the duplexer 22, a power amplifier 231 and/or a low noise amplifier 233 is provided,

the power amplifier 231 is used for amplifying the second band radio frequency signal.

The low noise amplifier 233 serves to reduce noise and amplify the useful radio frequency signals carried on the third frequency band.

Further, in a case where the mixer receives a radio frequency signal of a first frequency band generated by converting the information stream by the communication chip, the mixer receives a first control instruction generated by the baseband processor, the radio frequency transceiver, or the communication chip. The mixer is started according to the first control instruction, and the radio-frequency signal of the first frequency band is subjected to frequency modulation processing to obtain a radio-frequency signal of a second frequency band.

Or,

in the case where the mixer receives the radio frequency signal of the second frequency band received by the duplexer through the antenna, the mixer receives a first control instruction, and the first control instruction is received by the baseband processor, the radio frequency transceiver, or the communication chip. The mixer is started according to the first control instruction, and frequency modulation processing is carried out on the radio-frequency signal of the third frequency band to obtain the radio-frequency signal of the fourth frequency band.

Specifically, the mixer receives a first control instruction generated by a baseband processor, a radio frequency transceiver or a communication chip, and processes the radio frequency signal of the first frequency band according to the first control instruction, so as to obtain the radio frequency signal of the second frequency band.

Or, the mixer receives a first control instruction generated by the baseband processor, the radio frequency transceiver or the communication chip, and processes the radio frequency signal of the third frequency band according to the first control instruction, so as to obtain the radio frequency signal of the fourth frequency band.

In practical application, the baseband processor, the radio frequency transceiver or the communication chip is directly connected with the mixer, and sends a first control instruction to the mixer for controlling the working mode of the mixer.

As shown in fig. 5, the baseband processor and the mixer are directly connected for explanation, and the baseband processor directly sends the first control command to the mixer to control the operation mode of the mixer. Because the mixer is a relatively independent device, the mixer processes radio frequency signals, and therefore power consumption is large. According to the embodiment of the invention, the baseband processor can control the frequency mixer through the first control instruction, so that the working mode of the frequency mixer can be adjusted timely, and the effect of saving electricity is achieved. For example, when the mixer is in an idle state when the terminal has no data to transmit/receive, the baseband processor may send a control command to the mixer to turn off the mixer or set the mixer in a sleep mode.

Similarly, the first control command may also be sent to the mixer by the radio frequency transceiver or the communication chip, which can achieve the same effect as the baseband processor. In addition, the baseband processor can send a control instruction to the radio frequency transceiver, and the radio frequency transceiver generates a first control instruction according to the instruction and sends the first control instruction to the mixer to indicate the working mode of the mixer. The control command between the baseband processor and the radio frequency transceiver and the first control command can be controlled by the same command or by different command forms.

Further, the first control instruction includes any one or more of the following instructions: the system comprises a working state instruction, a clock frequency instruction, an operation mode instruction and a system reset instruction, wherein the working state instruction is used for controlling the on or off of a mixer; the clock frequency instruction is used for synchronizing the clock frequency among the baseband processor, the radio frequency transceiver and/or the frequency mixer; the operation mode instruction is used for dynamically controlling a frequency adjustment mode of the frequency mixer for adjusting the frequency of the first frequency band radio frequency signal to a second frequency band radio frequency signal and/or adjusting the frequency of the third frequency band radio frequency signal to a fourth frequency band radio frequency signal; the system reset instruction is used for controlling the mixer to carry out reset operation.

Specifically, the mixer can be controlled in various ways by the first control instruction. The most basic control is the on/off state of the mixer. The mixer is in an open state when the mixer is used by controlling the switch of the mixer, so that the aim of saving energy is fulfilled. In addition, the clock frequency can be transmitted to synchronize the clock frequency between the baseband processor, the radio frequency transceiver or the communication chip and the frequency mixer; meanwhile, the processing mode of the mixer for the first frequency band radio-frequency signal or the third frequency band radio-frequency signal can be controlled through the operation mode instruction, the first frequency band radio-frequency signal is modulated to the second frequency band of the specific frequency band, and/or the third frequency band radio-frequency signal of the specific frequency band is modulated to the fourth frequency band.

In practical applications, the first control instruction represents a type of control instruction sent by the baseband processor to the mixer, and is not limited to an instruction for controlling an on/off state of the mixer, for example, the first control instruction may include a clock, a mode instruction, a reset (reset) instruction, and the like, and may be transmitted through an SPI (Serial Peripheral Interface) or a GPIO (General Purpose Input/Output) analog Interface, where the interfaces are General Purpose interfaces with a large number of chips, so that an additional Interface is not required to be designed to transmit the first control instruction, and compatibility between devices is ensured. The baseband processor, the radio frequency transceiver or the communication chip is directly connected to the frequency mixer, and sends a first control instruction to the frequency mixer for controlling the working mode of the frequency mixer.

Further, as shown in fig. 6, fig. 6 is a schematic structural diagram of controlling an operation mode of the power amplifier and/or the low noise amplifier by sending a second control instruction to the baseband processor. The power amplifier 231 and/or the low noise amplifier 233 receive a second control instruction, the second control instruction is generated by the baseband processor 201, the radio frequency transceiver 203, or the communication chip 20, wherein the second control instruction at least includes: and (5) operating state instructions. The power amplifier 231 and/or the low noise amplifier 233 will set the operation state to on or off according to the second control instruction.

Specifically, the power amplifier and/or the low noise amplifier respectively receives a second control instruction generated by the baseband processor, the radio frequency transceiver or the communication chip, and amplifies the radio frequency signal of the second frequency band according to the second control instruction, or performs noise reduction on the radio frequency signal of the fourth frequency band. The second control instruction may control the power amplifier or the low noise amplifier, or may control the power amplifier and the low noise amplifier simultaneously. Of course, only one of the power amplifier and the low noise amplifier may be controlled according to the actual application scenario.

In practical application, for the process of transmitting the radio frequency signal, after receiving the radio frequency signal modulated to the first frequency band generated by the radio frequency transceiver, the mixer modulates the radio frequency signal of the first frequency band to the second frequency band, inputs the radio frequency signal to the power amplifier for amplification, inputs the radio frequency signal to the duplexer, and finally transmits the radio frequency signal through the antenna. For the process of receiving signals, the antenna receives radio frequency signals of a third frequency band, the radio frequency signals are input into a low-noise amplifier after passing through a duplexer to eliminate partial noise and then are sent to a mixer, the mixer converts the signals into a fourth frequency band and then inputs the fourth frequency band into a radio frequency transceiver, baseband signals are generated through demodulation and finally input into a baseband processor, and information sent by a signal source is restored.

Specifically, since the power amplifier and/or the low noise amplifier may consume power, the embodiment of the present invention provides that the baseband processor, the radio frequency transceiver, the mixer, or the communication chip can output the second control command to the power amplifier and/or the low noise amplifier, so as to control the operating mode of the power amplifier and/or the low noise amplifier, thereby achieving the purpose of saving power.

As shown in fig. 7, the first control instruction and the second control instruction may be generated by the baseband processor, the radio frequency transmitter, or a communication chip composed of the baseband processor and the radio frequency transceiver. According to the actual requirement, in the application, only the first control instruction can be set to control the mixer, and only the second control instruction can be set to control the power amplifier and the low noise amplifier. Of course, the first control command and the second control command may be set simultaneously to control the mixer, the power amplifier, and the low noise amplifier separately.

Further, when the first control instruction and the second control instruction are generated by the baseband processor at the same time, the baseband processor sends the first control instruction to the mixer through the local first interface, and the baseband processor sends the second control instruction to the power amplifier and/or the low noise amplifier through the local second interface, or, when the first control instruction and the second control instruction are generated by the baseband processor at the same time, the baseband processor sends the first control instruction to the mixer through the local first interface and sends the second control instruction to the power amplifier and/or the low noise amplifier, respectively, or, when the first control instruction and the second control instruction are generated by the baseband processor at the same time, the baseband processor sends the first control instruction and the second control instruction to the mixer through the local first interface, and forwards the second control instruction to the power amplifier and/or the low noise amplifier through the mixer, or when the first control instruction and the second control instruction are generated by the baseband processor at the same time, the baseband processor sends the first control instruction to the mixer through the local first interface, and the mixer generates the second control instruction through the first control instruction and sends the second control instruction to the power amplifier and/or the low-noise amplifier.

Specifically, there are various ways to send the first control command and the second control command. The transmission can be carried out through different interfaces, and can also be carried out through the same interface in different instruction forms.

The baseband processor, the radio frequency transceiver, the mixer or the communication chip can be directly connected to the power amplifier and/or the low noise amplifier, and the second control instruction is sent to the power amplifier and/or the low noise amplifier to control the working mode of the power amplifier and/or the low noise amplifier. Of course, the same type of command may be sent to the mixer through the same interface of the baseband processor, the radio frequency transceiver, or the communication chip, and then the mixer separates the command to generate a second control command for controlling the power amplifier and/or the low noise amplifier.

In practical applications, the first control instruction and the second control instruction are both generated by the baseband processor and sent to the mixer and the power amplifier and/or the low noise amplifier, so that two interfaces for sending the two instructions can be combined.

As shown in fig. 8, taking the case of sending the first control command and the second control command by baseband processing at the same time as an example, two sending interfaces for sending the first control command and sending the second control command are combined, so that the baseband processor only needs to output one signal to achieve the purpose of controlling the mixer, the power amplifier and/or the low noise amplifier, thereby avoiding the high complexity and high cost caused by the baseband processor chip extending out of more interfaces.

In addition, as shown in fig. 9, the second control command is generated by the mixer as an example. The mixer generates a second control instruction for controlling the power amplifier and/or the low noise amplifier by receiving a first control instruction generated by the baseband processor, the radio frequency transceiver or the communication chip. Therefore, the ports of the baseband processor, the radio frequency transceiver or the communication chip for outputting the control signaling can be reduced, and special changes of the baseband processor and the radio frequency transceiver aiming at the second control signaling can be reduced as much as possible, so that the technical scheme of the invention is simpler and more feasible.

Preferably, as shown in fig. 10, in an alternative embodiment provided by the present application, a first channel selector 251 and a second channel selector 253 are disposed between the communication chip 20 and the mixer 24 of the terminal, the first channel selector 251 is further connected to the new duplexer 23 with antenna through the new power amplifier 235, and the second channel selector 253 is further connected to the new duplexer 23 with antenna through the new low noise amplifier 237.

Wherein, the first channel selector 251 is used to control whether to perform frequency modulation processing on the transmitted rf signal by the mixer 24;

the second channel selector 253 is used to control whether to receive the frequency modulated signal from the mixer 24.

Specifically, a first channel selector and a second channel selector which respectively control the transmission data and the reception data may be arranged between the radio frequency transceiver and the mixer, and the two channel selectors may be controlled by a third control instruction, so as to achieve the purpose of controlling whether to perform frequency modulation processing on the transmitted or received radio frequency signal. The first channel selector and the second channel selector may be provided independently of each other, or the first channel selector and the second channel selector may be provided integrally.

The specific control mode may include the following steps:

the first channel selector and the second channel selector acquire a third control instruction.

And the first channel selector controls whether the frequency modulation processing is carried out on the transmitted radio-frequency signal through the mixer or not according to a third control instruction.

The second channel selector controls whether or not to receive the signal frequency-modulated by the mixer, according to a third control instruction.

In practical applications, a first channel selector and a second channel selector are included between the radio frequency transceiver and the mixer. The first channel selector is used for selecting whether a radio-frequency signal carried in a first frequency band from the radio-frequency transceiver needs to enter the mixer for frequency modulation processing, and the second channel selector is used for selecting whether the radio-frequency signal subjected to frequency modulation from the mixer to a fourth frequency band is sent to the radio-frequency transceiver for processing or the radio-frequency signal carried in a third frequency band or not subjected to frequency modulation processing is sent to the radio-frequency transceiver for processing.

Specifically, for transmitting rf signals, the rf transceiver transmits rf signals operating in a first frequency band. By adding the first channel selector, whether the radio frequency signals are processed by the mixer and then subjected to power amplification can be intelligently selected according to actual needs, and the radio frequency signals carried in the first frequency band or the second frequency band can be flexibly selected. The same is true for receiving the radio frequency signals, and the second channel selector can flexibly select to receive the radio frequency signals carried in the third frequency band or the fourth frequency band, so that the method has good flexibility.

There are many methods for controlling channel selection, and a fixed selection method may be set when the device leaves a factory; the first channel selector and/or the second channel selector may be controlled by a third control instruction; the first channel selector and/or the second channel selector can be controlled through manual selection of a user; in addition to this, it is also possible to control the first channel selector and the second channel selector by receiving a selection indication sent from the base station.

Preferably, as shown in fig. 11, a first channel selector 251 and a second channel selector 253 are provided between the communication chip 20 and the mixer 24 of the terminal, a third channel selector 255 is provided between the power amplifier 231 and the duplexer 22, a fourth channel selector 257 is provided between the low noise amplifier 233 and the duplexer 22, the first channel selector 251 is further connected to the third channel selector 255, and the second channel selector 253 is further connected to the fourth channel selector 257.

The third channel selector 255 and the first channel selector 251 control whether the frequency modulation processing is performed on the transmitted rf signal by the mixer 24.

The fourth channel selector 257 and the second channel selector 253 control whether or not to receive the signal frequency-modulated by the mixer 24.

Specifically, in addition to providing the first channel selector and the second channel selector between the radio frequency transceiver and the mixer, respectively, a third channel selector and a fourth channel selector may be provided between the mixer and the duplexer, respectively. The first channel selector is connected with the third channel selector, and the second channel selector is directly connected with the fourth channel selector. By adding the third channel selector and the fourth channel selector, whether the radio-frequency signals are subjected to frequency modulation processing through the frequency mixer can be selected without adding an additional duplexer and an antenna. The third channel selector and the fourth channel selector may be provided independently of each other, or may be provided by integrating the third channel selector and the fourth channel selector together, as in the case of the first channel selector and the second channel selector.

The specific control mode may include the following steps:

the first channel selector, the second channel selector, the third channel selector, and the fourth channel selector acquire a third control instruction.

And the first channel selector and the third channel selector control whether the frequency modulation processing is carried out on the transmitted radio-frequency signal through the frequency mixer or not according to a third control instruction.

And the second channel selector and the fourth channel selector control whether to receive the radio-frequency signals subjected to frequency modulation processing by the frequency mixer or not according to a third control instruction.

In practical applications, a channel selector may also be included between the mixer and the duplexer for selecting whether the signal processed by the mixer or not is sent to the duplexer and finally sent out, and for selecting whether the signal from the duplexer needs to enter the mixer for processing.

Preferably, as shown in fig. 12, in an alternative embodiment provided by the present application, the manner of connecting the first channel selector 251 and the third channel selector 255 and/or connecting the second channel selector 253 and the fourth channel selector 257 includes: directly or via a new power amplifier 235 and/or a new low noise amplifier 237, respectively, wherein the first channel selector 251 is connected to the third channel selector 255 via the new power amplifier 235 and the second channel selector 253 is connected to the fourth channel selector 257 via the low noise amplifier 237.

Specifically, the first channel selector and the third channel selector, and the second channel selector and the fourth channel selector may be connected by other means, such as a power amplifier and/or a low noise amplifier, or a filter, in addition to direct or indirect connection.

The first channel selector, the second channel selector, the duplexer and the antenna are arranged in such a way that the radio-frequency signal carried in the first frequency band directly output by the radio-frequency transceiver can be utilized, but an additional duplexer and an additional antenna are required. By adding the third channel selector and the fourth channel selector between the mixer and the duplexer, the duplexer and the antenna can be reused, thereby reducing the manufacturing cost and the occupied space. Wherein the duplexer and the antenna are compatible with the radio frequency signals of the first frequency band and the radio frequency signals of the second frequency band, i.e. they guarantee good performance for the signals carried on both frequency bands.

The control methods of the third channel selector and the fourth channel selector may be various, and may be a fixed selection method set at the time of factory shipment; the first channel selector and/or the second channel selector may be controlled by a third control instruction; the first channel selector and/or the second channel selector can be controlled through manual selection of a user; in addition to this, it is also possible to control the first channel selector and the second channel selector by receiving a selection indication sent from the base station. In the following description, the first channel selector and the second channel selector are not described in detail.

Further, the third control instruction is obtained by any one or more of the following: and generating by the baseband processor, generating by the radio frequency transceiver, setting the third control instruction in advance to obtain, and receiving the selection instruction sent by the base station.

Specifically, the third control instruction for controlling the first channel selector, the second channel selector, the third channel selector, and the fourth channel selector may be obtained in various manners, and may be configured according to specific practical situations.

When the first channel selector and/or the second channel selector and the third channel selector and/or the fourth channel selector are/is controlled by manually selecting and generating a third control instruction by a user, an entity selection button can be arranged on the terminal or a virtual switch is added in a setting menu, and a selection instruction is sent to the channel selector according to the setting of the user so as to select to send the radio-frequency signal carried on the first frequency band and/or receive the radio-frequency signal carried on the third frequency band. For example, a button is added to the exterior of the terminal, and the on and off of the button controls the selection of the channel by the first channel selector and/or the second channel selector, respectively. The control of the first channel selector and/or the second channel selector and the third channel selector and/or the fourth channel selector can also be realized by adding setting items on a setting menu of an operating system (such as an apple ios system or an android system) loaded on the terminal and generating a third control instruction by selecting the setting items on the menu.

When the third control instruction sent from the base station is received to control the first channel selector and/or the second channel selector and the third channel selector and/or the fourth channel selector, the base station can be flexibly selected according to the traffic load. If the base station finds that the network load of the third frequency band is heavy, the base station can send a selection instruction to the terminal to indicate the terminal to directly select a communication channel corresponding to the radio-frequency signal of the fourth frequency band for receiving.

It should be further noted that the selection instructions for controlling the first channel selector and the third channel selector in the transmission process may be different from the selection instructions for controlling the second channel selector and the fourth channel selector in the reception process. That is, the transmission selection indications of the first channel selector and the third channel selector may be different, and the reception selection indications of the second channel selector and the fourth channel selector may be different. For example, the terminal may transmit signals in a frequency band modulated by the radio frequency transceiver via the mixer, receive signals directly in the frequency band of the radio frequency transceiver without the mixer, or vice versa, which may make the transmission or reception of signals more flexible.

For example, when the mobile communication network detects that the uplink traffic (terminal transmission, base station reception) in the first frequency band directly transmitted by the radio frequency transceiver and the downlink traffic (base station transmission, terminal reception) in the third frequency band requiring frequency modulation by the mixer are heavier, the base station may transmit a third control instruction to instruct the terminal to perform communication by using the second frequency band radio frequency signal generated by the frequency modulation processing by the mixer during the uplink traffic; and when the terminal is indicated to carry out downlink service, the fourth frequency band radio frequency signal which can be directly received by the radio frequency transceiver is used for communication.

Furthermore, the second control instruction for controlling the power amplifier and/or the low noise amplifier may also be passed through an interface to which the channel selector is connected. In practical applications, the second control instruction may be omitted when the second control instruction only comprises an instruction to control the power amplifier and/or the low noise amplifier to be switched on/off, in which case the connections between the first channel selector and the second channel selector and the power amplifier and the low noise amplifier, respectively, comprise a power interface, and the power amplifier and/or the low noise amplifier is directly switched off if the channel selector does not select the channel.

Preferably, as shown in fig. 13, in an alternative embodiment provided by the present application, at least one balun 26 is added between the communication chip 20 and the mixer 24, and/or between the mixer 24 and the power amplifier 231, and/or between the mixer 24 and the low noise amplifier 233.

Specifically, additional devices, such as unbalanced-to-balanced converters (BALUN), may be provided between the communication chip, the mixer, the power amplifier, and the low noise amplifier for the purpose of improving communication quality.

In practical applications, as in fig. 13, the dotted line part is a position where a non-equilibrium converter (BALUN) can be set. Adding a BALUN (BALUN) between the rf transceiver and the mixer for converting between single ended and differential signals ensures proper current and output power. Of course, the BALUN (BALUN) can also be integrated directly in the chip, for example in a radio frequency transceiver or mixer.

Preferably, as shown in fig. 14, in an alternative embodiment provided by the present application, a filter 28 is added between the mixer 24 and the power amplifier 231 and/or between the mixer 24 and the low noise amplifier 233, respectively.

Specifically, a filter is added between the mixer and the power amplifier and/or between the mixer and the low-noise amplifier, so that the influence of noise on the output signal is smaller, and the communication quality is improved.

As shown in fig. 15, when the first channel selector and/or the second channel selector and/or the third channel selector and/or the fourth channel selector are/is included, the first channel selector and/or the second channel selector are/is disposed between at least one of the unbalanced-balanced converters 26 and one side of the mixer 24, and the first channel selector and/or the second channel selector are/is connected to one side of the unbalanced-balanced converter 26 and one side of the mixer 24, respectively; a third channel selector and/or a fourth channel selector is arranged between the other side of the mixer 24 and the at least one balun 26, the third channel selector and/or the fourth channel selector being connected to the other side of the mixer 24 and the balun 26, respectively.

Preferably, as shown in fig. 16, in an alternative embodiment provided by the present application, a crystal clock source 30 is provided, the crystal clock source 30 is respectively connected to the baseband processor 201 and/or the radio frequency transceiver 203 and the mixer 24, and the crystal clock source 30 is used for synchronizing clock frequencies of the baseband processor 201 and the mixer 24.

Specifically, by adding the crystal clock source separately, the crystal clock does not need to be additionally configured for the mixer, so that the cost is further reduced, and the overall clock frequency is conveniently controlled. The crystal clock source may be integrated in the baseband processor or the rf transceiver, or may be independent of the baseband processor or the rf transceiver.

Example 2

The embodiment of the invention provides a wireless communication method.

Fig. 17a and 17b are flowcharts of a wireless communication method according to an embodiment of the invention. A mixer is arranged between a communication chip of a terminal and a duplexer, and the method comprises the following steps:

in step S10a, the mixer receives a first band rf signal generated by converting the information stream through the communication chip.

Step S12a, the frequency mixer performs frequency modulation processing on the first frequency band radio frequency signal to obtain a frequency modulated second frequency band radio frequency signal.

In step S14a, the mixer sends the second band rf signal to the duplexer.

Specifically, in the process of transmitting the signal by the terminal in the above steps S10a to S14a, the rf transceiver included in the communication chip acquires the baseband signal from the baseband processor and modulates the baseband signal to the first frequency band to generate the first frequency band rf signal. The mixer receives a first frequency band radio frequency signal, modulates the signal to a second frequency band to generate a second frequency band radio frequency signal, and finally sends the second frequency band radio frequency signal out through an antenna, wherein the first frequency band radio frequency signal is generated by a radio frequency transceiver according to the acquired baseband signal, and the radio frequency transceiver does not have the capability of directly generating the second frequency band radio frequency signal carried in the second frequency band.

Or,

in step S10b, the mixer receives the third band rf signal received by the duplexer via the antenna.

Step S12b, the mixer performs frequency modulation processing on the third frequency band rf signal to obtain a fourth frequency band rf signal.

In step S14b, the mixer transmits the fourth band rf signal to the communication chip.

Specifically, in the process of receiving the signal at the terminal in the above steps S10b to S14b, the mixer acquires the third band rf signal carried in the third frequency band from the antenna, and modulates the third band rf signal into the fourth frequency band to generate the fourth band rf signal, and the rf transceiver included in the communication chip demodulates the fourth band rf signal to generate the baseband signal, where the rf transceiver does not have the capability of directly processing the third band rf signal carried in the third frequency band.

Preferably, in an optional embodiment provided by the present application, the communication chip can only transmit the radio frequency signal in the first frequency band, or receive the radio frequency signal in the fourth frequency band, where the first frequency band and the fourth frequency band used by the radio frequency signal in the first frequency band and the radio frequency signal in the fourth frequency band are authorized radio communication frequency bands, and the third frequency band and the second frequency band used by the radio frequency signal in the third frequency band and the radio frequency signal in the second frequency band are unauthorized radio communication frequency bands.

A band represents a contiguous segment of frequency, and for a Time Division Duplex (TDD) system, uplink and downlink transmissions use the same band, and thus are the same for both uplink and downlink regardless of the first band and the fourth band, or the second band and the third band, and typically a segment of a band is named or numbered as a band. For a Frequency Division Duplex (FDD) system, uplink and downlink transmissions use different frequency bands, that is, a first frequency band corresponding to the uplink transmission and a fourth frequency band corresponding to the downlink transmission in the embodiment of the present invention are different, and a second frequency band corresponding to the uplink transmission and a third frequency band corresponding to the downlink transmission are different, but they are also numbered or named as the same frequency band in pairs. For example, the following table shows four frequency bands, numbered 1, 22, 38, 41 respectively, defined by 3GPP in the LTE standard specification, as shown in table 1 in the above device embodiment. For Time Division Duplex (TDD), the first and fourth frequency bands may be frequency bands corresponding to band 38 (2570 MHz-2620 MHz), the second and third frequency bands may be frequency bands corresponding to band 41 (2496 MHz-2690 MHz), and both uplink and downlink use the same frequency band. For a Frequency Division Duplex (FDD) system, the uplink and downlink are different for the same numbered frequency band, for example, the frequency band 22 includes an uplink frequency band and a downlink frequency band, which indicates 1920MHz-1980MHz for the transmission process in fig. 2, and indicates 2110MHz-2170MHz for the reception process, and only when the uplink frequency band of the first frequency band is mentioned, the 1920MHz-1980MHz is indicated exclusively; in the present invention, the first frequency band and the fourth frequency band may be frequency bands corresponding to frequency band 1, which correspond to 1920MHz-1980MHz and 2110MHz-2170MHz, respectively, for the terminal; the second and third frequency bands may be frequency bands corresponding to frequency band 22, which correspondingly correspond to 3410 MHz-3490 MHz and 3510 MHz-3590 MHz, respectively.

A frequency band represents a contiguous segment of frequency, and for a TDD system both uplink and downlink transmissions use the same frequency band, and thus for both uplink and downlink regardless of the first and fourth frequency bands or the second and third frequency bands. For the FDD system, uplink and downlink transmissions use different frequency bands, and if not specifically described, in the embodiment of the present invention, a first frequency band corresponding to the uplink transmission and a fourth frequency band corresponding to the downlink transmission are provided, and a second frequency band corresponding to the uplink transmission and a third frequency band corresponding to the downlink transmission are also provided. For example, the following table shows four frequency bands, numbered 1, 22, 38, 41, defined by 3GPP in the LTE standard specification. For TDD, the first frequency band and the fourth frequency band may be frequency bands corresponding to frequency band 38, the second frequency band and the third frequency band may be frequency bands corresponding to frequency band 41, and since the same frequency band is used for uplink and downlink, it is not necessary to separately describe for uplink and downlink. For FDD system, if not specifically stated, the first frequency band or the fourth frequency band may represent frequency band 1, the second frequency band or the third frequency band may represent frequency band 22, including uplink frequency band and downlink frequency band, and represent 1920MHz-1980MHz for the transmission process in the above figure, and represent 2110MHz-2170MHz for the reception process, and only when the uplink frequency band of the first frequency band is specifically mentioned, 1920MHz-1980MHz is specifically indicated.

Here, further to the practical explanation, if the first frequency band and the fourth frequency band are Licensed (Licensed) frequency bands for mobile communication, the second frequency band and the third frequency band are Unlicensed (Unlicensed) frequency bands for mobile communication. For example, the first frequency band and the fourth frequency band are frequency bands around 1.8GHz (for example: 1880-1900MHz), frequency bands around 2.3GHz (for example: 2320-2370MHz) or frequency bands around 2.6GHz (for example, 2575-2635MHz), which are already allocated to one or more mobile communication operators, and corresponding commercial communication chips are mature, so that the frequency bands are called Licensed (Licensed); the second frequency band and the third frequency band are, for example, a frequency band around 2.4GHz (e.g., 2420-2483 MHz), a frequency band around 3.5GHz (e.g., 3550-3650MHz), a frequency band around 5.1GHz (e.g., 5150-5350MHz), or a frequency band around 5.8GHz (e.g., 5725-5850MHz), etc., which are Unlicensed (Unlicensed) frequency bands, which can be freely used by more operators or the general public, and are rich in frequency spectrum but are less frequently used at present. The method in the embodiment can convert the authorized frequency band (Licensed) generated by the commercial communication chip to any unauthorized frequency band (Unlicensed), and can easily realize the terminal which can enable the commercial communication chip only generating the radio frequency signal of the authorized frequency band to work on the Unlicensed frequency band under the condition that a chip manufacturer does not develop a special chip of the unauthorized frequency band.

Preferably, in an optional embodiment provided by the present application, the communication chip supports a carrier aggregation technology, where the carrier aggregation technology is used to aggregate radio frequency signals carried on at least two frequency bands together for wireless transmission, and the first frequency band radio frequency signal and/or the fourth frequency band radio frequency signal are/is a main carrier of at least two carriers processed by the communication chip.

Preferably, in an alternative embodiment provided by the present application, the communication chip includes a baseband processor, a radio frequency transceiver, wherein,

the baseband processor is used for converting the information stream into a baseband signal or converting the baseband signal into the information stream.

The radio frequency transceiver is used for converting the baseband signal into a first frequency band radio frequency signal or converting the fourth frequency band radio frequency signal into a baseband signal.

Specifically, as shown in fig. 3, the baseband processor and the rf transceiver may be separate chips or integrated in one chip. The baseband processor is mainly used for interconversion between information streams and baseband signals, and the radio frequency transceiver is mainly used for interconversion between baseband signals and radio frequency signals.

In the prior art, a baseband processor is used to convert an information stream into baseband signals according to a communication protocol, and the baseband processor is usually integrated with an application processor to become a baseband application processor BB/AP.

Preferably, in an optional embodiment provided by the present application, in a case that the mixer receives a radio frequency signal of a first frequency band generated by converting an information stream by a communication chip, the step S12a of performing frequency modulation processing on the radio frequency signal of the first frequency band by the mixer to obtain a frequency-modulated radio frequency signal of a second frequency band includes:

in step S121a, the mixer receives a first control command, where the first control command is generated by the baseband processor, the radio frequency transceiver, or the communication chip.

Step S123a, the mixer is started according to the first control instruction, and performs frequency modulation on the radio frequency signal of the first frequency band to obtain a radio frequency signal of the second frequency band.

Or,

when the mixer receives the rf signal of the second frequency band received by the duplexer via the antenna, the step S12b of performing frequency modulation processing on the rf signal of the third frequency band by the mixer to obtain the rf signal of the fourth frequency band includes:

in step S121b, the mixer receives a first control command, where the first control command is a baseband processor, a radio frequency transceiver, or a communication chip.

Step S123b, the mixer is started according to the first control instruction, and performs frequency modulation processing on the radio frequency signal of the third frequency band to obtain a radio frequency signal of the fourth frequency band.

Specifically, through the steps S121a and S123a, the mixer receives a first control command generated by the baseband processor, the radio frequency transceiver, or the communication chip, and processes the radio frequency signal of the first frequency band according to the first control command, so as to obtain the radio frequency signal of the second frequency band.

Alternatively, through the steps S121b and S123b, the mixer receives the first control command generated by the baseband processor, the radio frequency transceiver, or the communication chip, and processes the radio frequency signal of the third frequency band according to the first control command, so as to obtain the radio frequency signal of the fourth frequency band.

In practical applications, as shown in fig. 4, the baseband processor, the rf transceiver or the communication chip is directly connected to the mixer, and sends a first control command to the mixer for controlling the operation mode of the mixer.

Preferably, in an optional embodiment provided by the present application, the first control instruction includes any one or more of the following instructions: the system comprises a working state instruction, a clock frequency instruction, an operation mode instruction and a system reset instruction, wherein the working state instruction is used for controlling the on or off of a mixer; the clock frequency instruction is used for synchronizing the clock frequency among the baseband processor, the radio frequency transceiver and/or the frequency mixer; the operation mode instruction is used for dynamically controlling a frequency adjustment mode of the frequency mixer for adjusting the frequency of the first frequency band radio frequency signal to a second frequency band radio frequency signal and/or adjusting the frequency of the third frequency band radio frequency signal to a fourth frequency band radio frequency signal; the system reset instruction is used for controlling the mixer to carry out reset operation.

Preferably, in an optional embodiment provided by the present application, a power amplifier and/or a low-noise amplifier is disposed between the mixer and the duplexer, where the power amplifier is configured to amplify the radio frequency signals in the second frequency band, and the low-noise amplifier is configured to reduce noise and amplify useful radio frequency signals carried in the third frequency band, where the step of performing frequency modulation processing on the radio frequency signals in the first frequency band by the mixer in step S12a to obtain the radio frequency signals in the second frequency band after frequency modulation processing, or performing frequency modulation processing on the radio frequency signals in the third frequency band in step S12b to obtain the radio frequency signals in the fourth frequency band further includes:

step S121, the power amplifier and/or the low noise amplifier receives a second control instruction, where the second control instruction is generated by the baseband processor, the radio frequency transceiver, or the communication chip, and the second control instruction at least includes: and (5) operating state instructions.

In step S123, the power amplifier and/or the low noise amplifier sets the operating state to be on or off according to the second control instruction.

Specifically, through the steps S121 and S123, the power amplifier and/or the low noise amplifier respectively receives a second control instruction generated by the baseband processor, the radio frequency transceiver, or the communication chip, and performs amplification processing on the radio frequency signal of the second frequency band according to the second control instruction, or performs noise reduction processing on the radio frequency signal of the fourth frequency band. The second control instruction may control the power amplifier or the low noise amplifier, or may control the power amplifier and the low noise amplifier simultaneously. Of course, only one of the power amplifier and the low noise amplifier may be controlled according to the actual application scenario.

In practical application, as shown in fig. 6, for the process of transmitting the radio frequency signal, after receiving the radio frequency signal modulated to the first frequency band generated by the radio frequency transceiver, the mixer modulates the radio frequency signal of the first frequency band to the second frequency band, inputs the modulated radio frequency signal to the power amplifier for amplification, inputs the amplified radio frequency signal to the duplexer, and finally transmits the amplified radio frequency signal through the antenna. For the process of receiving signals, the antenna receives radio frequency signals of a third frequency band, the radio frequency signals are input into a low-noise amplifier after passing through a duplexer to eliminate partial noise and then are sent to a mixer, the mixer converts the signals into a fourth frequency band and then inputs the fourth frequency band into a radio frequency transceiver, baseband signals are generated through demodulation and finally input into a baseband processor, and information sent by a signal source is restored.

As shown in fig. 7, the present invention is a schematic structural diagram of controlling an operation mode of the power amplifier and/or the low noise amplifier by sending a second control instruction to the baseband processor.

The first control instruction and the second control instruction may be generated by the baseband processor, the radio frequency transmitter alone or by a communication chip composed of the baseband processor and the radio frequency transceiver. According to the actual requirement, in the application, only the first control instruction can be set to control the mixer, and only the second control instruction can be set to control the power amplifier and the low noise amplifier. Of course, the first control command and the second control command may be set simultaneously to control the mixer, the power amplifier, and the low noise amplifier separately.

Preferably, in an alternative embodiment provided by the present application, when the first control instruction and the second control instruction are generated simultaneously by the baseband processor, the baseband processor sends the first control instruction to the mixer through the local first interface, and the baseband processor sends the second control instruction to the power amplifier and/or the low noise amplifier through the local second interface, or, when the first control instruction and the second control instruction are generated simultaneously by the baseband processor, the baseband processor sends the first control instruction to the mixer through the local first interface and sends the second control instruction to the power amplifier and/or the low noise amplifier, respectively, or, when the first control instruction and the second control instruction are generated simultaneously by the baseband processor, the baseband processor sends the first control instruction and the second control instruction to the mixer through the local first interface, and forwarding the second control instruction to the power amplifier and/or the low-noise amplifier through the mixer, or when the first control instruction and the second control instruction are generated by the baseband processor at the same time, the baseband processor respectively sends the first control instruction to the mixer through the local first interface, and the mixer generates the second control instruction through the first control instruction and sends the second control instruction to the power amplifier and/or the low-noise amplifier.

Preferably, in an optional embodiment provided by the present application, a first channel selector and a second channel selector are disposed between a communication chip and a mixer of a terminal, the first channel selector is further connected to a new duplexer with an antenna through a new power amplifier, the second channel selector is further connected to the new duplexer with the antenna through a new low noise amplifier, and before the mixer receives a radio frequency signal generated by converting an information stream through the communication chip or a radio frequency signal received by the duplexer, the method further includes:

In practical applications, as shown in fig. 10, a first channel selector and a second channel selector are included between the radio frequency transceiver and the mixer. The first channel selector is used for selecting whether a radio-frequency signal carried in a first frequency band from the radio-frequency transceiver needs to enter the mixer for frequency modulation processing, and the second channel selector is used for selecting whether the radio-frequency signal subjected to frequency modulation from the mixer to a fourth frequency band is sent to the radio-frequency transceiver for processing or the radio-frequency signal carried in a third frequency band or not subjected to frequency modulation processing is sent to the radio-frequency transceiver for processing.

Preferably, in an optional embodiment provided by the present application, a first channel selector and a second channel selector are disposed between a communication chip and a mixer of the terminal, a third channel selector and a fourth channel selector are disposed between the mixer and a duplexer, the first channel selector is further connected to the third channel selector, the second channel selector is further connected to the fourth channel selector, and before the mixer receives a radio frequency signal generated by converting an information stream through the communication chip or a radio frequency signal received by the duplexer, the method further includes:

The first channel selector and the third channel selector, and the second channel selector and the fourth channel selector may be connected by other means, for example, by a filter, in addition to direct or indirect connection.

In practical applications, as shown in fig. 11, a channel selector may also be included between the mixer and the duplexer for selecting whether the signal processed by the mixer or not is sent to the duplexer and finally sent out, and for selecting whether the signal from the duplexer needs to enter the mixer for processing.

The first channel selector, the second channel selector, the duplexer and the antenna are arranged in such a way that the radio-frequency signal carried in the first frequency band directly output by the radio-frequency transceiver can be utilized, but an additional duplexer and an additional antenna are required. As shown in fig. 12, by adding the third channel selector and the fourth channel selector between the mixer and the duplexer, the duplexer and the antenna can be reused (reused), thereby reducing the manufacturing cost and the occupied space. Wherein the duplexer and the antenna are compatible with the radio frequency signals of the first frequency band and the radio frequency signals of the second frequency band, i.e. they guarantee good performance for the signals carried on both frequency bands.

Preferably, in an optional embodiment provided by the present application, the third control instruction is obtained by any one or more of the following manners: and generating by the baseband processor, generating by the radio frequency transceiver, setting the third control instruction in advance to obtain, and receiving the selection instruction sent by the base station.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a mobile terminal, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wireless communication method applied in a terminal, wherein a mixer is disposed between a communication chip and a duplexer of the terminal, the method comprising:

the frequency mixer receives a first frequency band radio frequency signal generated by converting information flow through the communication chip;

the frequency mixer performs frequency modulation processing on the first frequency band radio frequency signal to obtain a second frequency band radio frequency signal after the frequency modulation processing;

the mixer sends the second frequency band radio frequency signal to the duplexer;

or,

the mixer receives a third-band radio-frequency signal received by the duplexer through an antenna;

the frequency mixer performs frequency modulation processing on the third frequency band radio-frequency signal to obtain a fourth frequency band radio-frequency signal;

the mixer transmits the fourth frequency band radio frequency signal to the communication chip;

the communication chip can only send the first frequency band radio frequency signal or receive the fourth frequency band radio frequency signal, wherein the first frequency band and the fourth frequency band used by the first frequency band radio frequency signal and the fourth frequency band radio frequency signal are authorized wireless communication frequency bands, and the third frequency band and the second frequency band used by the third frequency band radio frequency signal and the second frequency band radio frequency signal are unauthorized wireless communication frequency bands.

2. The method of claim 1, wherein the communication chip supports carrier aggregation technology, wherein,

the carrier aggregation technology is used for aggregating radio frequency signals carried on at least two frequency bands together for wireless transmission, and the first frequency band radio frequency signal and/or the fourth frequency band radio frequency signal are/is a main carrier in at least two carriers processed by the communication chip.

3. The method of claim 1, wherein the communication chip comprises a baseband processor, a radio frequency transceiver, wherein,

the baseband processor is used for converting the information stream into a baseband signal or converting the baseband signal into the information stream;

the radio frequency transceiver is configured to convert the baseband signal into the first band radio frequency signal, or convert the fourth band radio frequency signal into the baseband signal.

4. The method of claim 1,

when the frequency mixer receives a radio frequency signal of a first frequency band generated by converting an information stream by the communication chip, the frequency mixer performs frequency modulation processing on the radio frequency signal of the first frequency band to obtain a radio frequency signal of a second frequency band after the frequency modulation processing, and the step includes:

the frequency mixer receives a first control instruction, and the first control instruction is generated by the communication chip;

the frequency mixer is started according to the first control instruction, and frequency modulation processing is carried out on the radio-frequency signal of the first frequency band to obtain a radio-frequency signal of a second frequency band;

or,

when the mixer receives the radio-frequency signal of the second frequency band received by the duplexer through the antenna, the frequency modulation processing is performed on the radio-frequency signal of the third frequency band by the mixer to obtain the radio-frequency signal of the fourth frequency band, and the step of obtaining the radio-frequency signal of the fourth frequency band includes:

the frequency mixer receives the first control instruction, and the first control instruction is generated by the communication chip;

and the frequency mixer is started according to the first control instruction, and performs frequency modulation processing on the radio-frequency signal of the third frequency band to obtain the radio-frequency signal of the fourth frequency band.

5. The method of claim 4, wherein the first control instruction comprises any one or more of: the frequency mixer comprises a working state instruction, a clock frequency instruction, an operation mode instruction and a system reset instruction, wherein the working state instruction is used for controlling the on or off of the frequency mixer; the clock frequency instruction is used for synchronizing the clock frequency among a baseband processor, a radio frequency transceiver and/or the frequency mixer; the operation mode instruction is used for dynamically controlling a frequency adjustment mode of the frequency mixer for frequency modulation of the first frequency band radio frequency signal to the second frequency band radio frequency signal and/or frequency modulation of the third frequency band radio frequency signal to the fourth frequency band radio frequency signal; the system reset instruction is used for controlling the frequency mixer to carry out reset operation.

6. The method according to claim 1, wherein a power amplifier and/or a low noise amplifier are disposed between the mixer and the duplexer, wherein the power amplifier is configured to amplify the second band rf signals, and the low noise amplifier is configured to reduce noise and amplify the third band rf signals, and wherein the mixer performs frequency modulation on the first band rf signals to obtain the second band rf signals after frequency modulation, or performs frequency modulation on the third band rf signals to obtain the fourth band rf signals, and further comprises:

the power amplifier and/or the low noise amplifier receives a second control instruction, the second control instruction is generated by the communication chip, wherein the second control instruction at least comprises: a working state instruction;

and the power amplifier and/or the low-noise amplifier sets the working state to be on or off according to the second control instruction.

7. The method according to claim 4 or 5, wherein a power amplifier and/or a low noise amplifier is provided between the mixer and the duplexer, wherein the power amplifier is used for amplifying the second band radio frequency signals, the low noise amplifier is used for reducing noise and amplifying the third band radio frequency signals, wherein,

the step of performing frequency modulation processing on the first frequency band radio frequency signal by the mixer to obtain the second frequency band radio frequency signal after the frequency modulation processing, or performing frequency modulation processing on the third frequency band radio frequency signal to obtain the fourth frequency band radio frequency signal by the mixer further includes:

the power amplifier and/or the low noise amplifier receives a second control instruction, where the second control instruction is generated by the baseband processor, the radio frequency transceiver, or the communication chip, and the second control instruction at least includes: a working state instruction;

8. The method according to claim 7, wherein the baseband processor sends the first control command to the mixer through a local first interface and sends the second control command to the power amplifier and/or the low noise amplifier through a local second interface when the first control command and the second control command are generated simultaneously by the baseband processor, or the baseband processor sends the first control command to the mixer and sends the second control command to the power amplifier and/or the low noise amplifier through a local first interface and sends the first control command to the mixer and the second control command to the low noise amplifier respectively when the first control command and the second control command are generated simultaneously by the baseband processor, or the baseband processor sends the first control command and the second control command to the mixer and/or the low noise amplifier respectively when the first control command and the second control command are generated simultaneously by the baseband processor, the baseband processor sends the first control instruction and the second control instruction to the mixer through a local first interface respectively, and forwards the second control instruction to the power amplifier and/or the low-noise amplifier through the mixer, or when the first control instruction and the second control instruction are generated by the baseband processor simultaneously, the baseband processor sends the first control instruction to the mixer through the local first interface respectively, and the mixer generates the second control instruction through the first control instruction and sends the second control instruction to the power amplifier and/or the low-noise amplifier.

9. The method according to claim 8, wherein a first channel selector and a second channel selector are provided between the communication chip of the terminal and the mixer, the first channel selector is further connected to a new duplexer with an antenna through a new power amplifier, the second channel selector is further connected to a new duplexer with an antenna through a new low noise amplifier, and before the mixer receives the radio frequency signal generated by the conversion of the information stream by the communication chip or the radio frequency signal received by the duplexer, the method further comprises:

the first channel selector and the second channel selector acquire a third control instruction;

the first channel selector controls whether the frequency modulation processing is carried out on the transmitted radio-frequency signal through the mixer or not according to the third control instruction;

and the second channel selector controls whether to receive the signals subjected to frequency modulation processing by the frequency mixer according to the third control instruction.

10. The method according to claim 8, wherein a first channel selector and a second channel selector are disposed between a communication chip of the terminal and the mixer, a third channel selector is disposed between the power amplifier and the duplexer, a fourth channel selector is disposed between the low-noise amplifier and the duplexer, the first channel selector is further connected to the third channel selector, the second channel selector is further connected to the fourth channel selector, and before the mixer receives the radio frequency signal generated by the conversion of the information stream by the communication chip or the radio frequency signal received by the duplexer, the method further comprises:

the first channel selector, the second channel selector, the third channel selector and the fourth channel selector acquire a third control instruction;

the first channel selector and the third channel selector control whether the frequency modulation processing is carried out on the transmitted radio-frequency signal through the frequency mixer or not according to the third control instruction;

and the second channel selector and the fourth channel selector control whether to receive the radio-frequency signals subjected to frequency modulation processing by the frequency mixer or not according to the third control instruction.

11. The method of claim 9 or 10, wherein the third control instruction is obtained by any one or more of: and the baseband processor generates, the radio frequency transceiver generates, sets the third control instruction in advance to obtain, and receives a selection instruction sent by a base station.

12. A wireless communication device is applied in a terminal, and is characterized in that a mixer is arranged between a communication chip of the terminal and a duplexer;

the frequency mixer is used for receiving a first frequency band radio frequency signal generated by converting an information stream through the communication chip; the frequency mixer performs frequency modulation processing on the first frequency band radio frequency signal to obtain a second frequency band radio frequency signal after frequency modulation processing; finally, the mixer sends the second frequency band radio frequency signal to the duplexer;

or,

the mixer is used for receiving a third-band radio-frequency signal received by the duplexer through an antenna; performing frequency modulation processing on the third frequency band radio-frequency signal by the frequency mixer to obtain a fourth frequency band radio-frequency signal;

finally, the mixer transmits the fourth frequency band radio frequency signal to the communication chip;

13. The apparatus of claim 12, wherein the communication chip comprises: a baseband processor, a radio frequency transceiver;

wherein the baseband processor is configured to convert the information stream into a baseband signal, or convert the baseband signal into the information stream;

14. The apparatus according to claim 13, wherein a power amplifier and/or a low noise amplifier is disposed between the mixer and the duplexer;

the power amplifier is used for amplifying the second frequency band radio frequency signal, and the low-noise amplifier is used for reducing noise and amplifying the third frequency band radio frequency signal.

15. The apparatus of claim 14, wherein a first channel selector and a second channel selector are provided between the communication chip of the terminal and the mixer, the first channel selector further connected to a new duplexer with an antenna through a new power amplifier, the second channel selector further connected to a new duplexer with an antenna through a new low noise amplifier;

wherein the first channel selector is configured to control whether to perform the frequency modulation processing on the transmitted radio frequency signal through the mixer;

the second channel selector is used for controlling whether to receive the signals subjected to frequency modulation processing by the frequency mixer.

16. The apparatus according to claim 14, wherein a first channel selector and a second channel selector are disposed between the communication chip of the terminal and the mixer, and a third channel selector and a fourth channel selector are disposed between the mixer and the duplexer, the first channel selector further connected to the third channel selector, and the second channel selector further connected to the fourth channel selector;

the third channel selector and the first channel selector jointly control whether the frequency modulation processing is carried out on the transmitted radio-frequency signal through the mixer or not;

the fourth channel selector and the second channel selector jointly control whether the signals frequency-modulated by the frequency mixer are received or not.

17. The apparatus of claim 16, wherein the manner in which the first and third channel selectors and/or the second and fourth channel selectors are coupled comprises:

the first channel selector is connected with the third channel selector through the new power amplifier, and the second channel selector is connected with the fourth channel selector through the new low noise amplifier.

18. The apparatus of claim 14, wherein at least one balun is added between the communication chip and the mixer, and/or between the mixer and the power amplifier, and/or between the mixer and the low noise amplifier.

19. The apparatus of claim 14, wherein a filter is added between the mixer and the power amplifier and/or between the mixer and the low noise amplifier, respectively.

20. An arrangement according to any one of claims 13 to 19, wherein a crystal clock source is provided, said crystal clock source being coupled to said baseband processor and/or radio frequency transceiver and said mixer respectively, said crystal clock source being arranged to synchronise the clock frequency of said baseband processor and said mixer.