Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments.
In recent years, with the development of communication technology, wireless communication devices are increasingly used. Wireless communication devices typically include a baseband system and a radio frequency system. The baseband system is used to generate a baseband signal. The radio frequency system is used for converting the baseband signal into a radio frequency signal, so that the radio frequency signal is transmitted into a wireless channel through an antenna.
At present, a radio frequency system in a wireless communication device can generally support multiple communication systems, signals of the multiple communication systems can include a 2G signal, a 4G signal and a 5G signal, and a radio frequency circuit of each communication system includes a power amplifier, so that the problem of high cost exists. For ease of understanding, a radio frequency system supporting multiple communication schemes will be illustrated below by taking a wireless communication device in a non-independent Networking (NSA) scenario applied in a New Radio (NR).
The 5G communication system introduces enhanced mobile broadband (enhanced mobile broadband, eMBB) technology. eMBB have a greater throughput, low latency, and a more consistent experience. Under eMBB application scenarios, data generated by the wireless communication device can grow geometrically, and mass data has unprecedented requirements on communication capability of the wireless communication device. Both the 5G NSA and independent networking (standalone, SA) deployment schemes have key schemes to improve communication rate.
Because the coverage area of the 5G base station is small, if the 5G base station and the long term evolution (long term evolution, LTE) base station are expected to cover the same area, the number of 5G base stations required is more than 3 times that of LTE base stations, and the network construction cost is suddenly increased. Due to the uneven economic development throughout the world and the different 4G (i.e. LTE) to 5G evolution strategies across countries, the 4G and 5G dual connectivity technology (E-UTRA NR dual connectivity, ENDC) scheme throughout the world will be an important 5G coverage scheme for a considerable period of time, i.e. the scheme with 4G and 5G dual connectivity guarantees signal continuity in 5G signal instability or uncovered areas.
NSA refers to deployment of 5G networks using existing 4G infrastructure, with the 5G carriers based on NSA architecture carrying only user data, their control signaling still being transmitted over the 4G network. For wireless communication devices, NSA requires that both 4G and 5G be able to operate simultaneously. In addition, many wireless communication devices also require one or more older standards. For example, many 4G/5G wireless communication devices are configured to support the 2G cellular standard, the global system for mobile communications (global system for mobile communications, GSM). 2G communications typically require higher transmit power (e.g., 33 dBm) at the cellular network antenna, for example, where 4G and 5G signals are not good, higher quality communications requirements may be ensured by 2G signal talk.
Fig. 1 is a schematic structural diagram of a radio frequency system 1000 supporting multiple communication systems according to the related art. As shown in fig. 1, the radio frequency system 1000 may include a radio frequency transceiver 110 and a radio frequency front end assembly 100, wherein the radio frequency front end assembly 100 includes a radio frequency front end transmit chip 120, a multimode, multi-frequency power amplifier (multimode multiband power amplifier, MMPA) 130, and a multimode, multi-frequency power amplifier 140.
The rf transceiver 110 may support the transmitting or receiving functions of wireless rf signals of various systems. The signals of the multiple communication systems may include, for example, a 2G signal, a 4G signal, and a 5G signal.
One end of the rf front-end transmitting chip 120 is connected to the rf transceiver 110, and the other end of the rf front-end transmitting chip 120 is connected to the antenna 121 to form a rf circuit for transmitting signals of a first communication system, which may be, for example, 2G signals. The rf front-end transmit chip 120 may also be referred to as a rf front-end transmit module (TxM), and the rf front-end transmit chip 120 may include an intermediate frequency amplifier 122, a low frequency power amplifier 126, and a switching device 129. One end of the switching device 129 is connected to the intermediate frequency amplifier 122 and the low frequency amplifier 126, and the other end of the switching device 129 is connected to the antenna 121. The radio frequency circuit of the signal of the first communication system may, for example, include two radio frequency branches, namely a radio frequency branch 123 and a radio frequency branch 127, where the radio frequency branch 123 is connected to the intermediate frequency power amplifier 122 and is used for transmitting the signal of the intermediate frequency band of the first communication system, and the radio frequency branch 127 is connected to the low frequency power amplifier 126 and is used for transmitting the signal of the low frequency band of the first communication system. It will be appreciated that when the rf transceiver 110 transmits signals in the if band of the first communication scheme, the switching device 129 may control the communication between the if power amplifier 122 and the antenna 121. When the rf transceiver 110 transmits a signal in the low frequency band of the first communication system, the switching device 129 may control the low frequency power amplifier 126 to communicate with the antenna 121. The switching device 129 may be a single pole, multi-throw switch, such as a single pole, 16-throw switch.
One end of the multimode, multifrequency power amplifier 130 is connected to the radio frequency transceiver 110, and the other end of the multimode, multifrequency power amplifier 130 is connected to the antenna 121 through the switching device 129 to form a radio frequency circuit for transmitting signals of a second communication system, which may be, for example, 4G signals. The multimode, multifrequency power amplifier 130 may include an intermediate frequency amplification power amplifier 132 and a switching device 133, a low frequency power amplifier 136 and a switching device 137, the switching device 133 may be, for example, a single pole, double throw switch, and the switching device 137 may be, for example, a single pole, triple throw switch. One end of the switching device 133 is connected to the intermediate frequency power amplifier 132, and the other end of the switching device 133 is connected to the antenna 121 through the switching device 129. One end of the switching device 137 is connected to the low frequency power amplifier 136, and the other end of the switching device 137 is connected to the antenna 121 through the switching device 129. The rf circuit of the signal in the second communication system may, for example, include two rf branches, namely, rf branch 134 and rf branch 138. The rf branch 134 is connected to the if power amplifier 132 and is operable to transmit signals in the if frequency band of the second communication system, and the rf branch 138 is connected to the low frequency power amplifier 136 and is operable to transmit signals in the low frequency band of the second communication system. It will be appreciated that when the rf transceiver 110 transmits signals in the if band of the second communication scheme, the switching device 129 may control the communication between the if power amplifier 132 and the antenna 121. When the rf transceiver 110 transmits a signal in the low frequency band of the second communication system, the switching device 129 may control to connect the low frequency power amplifier 136 and the antenna 121.
One end of the multimode, multifrequency power amplifier 140 is connected to the rf transceiver 110, and the other end of the multimode, multifrequency power amplifier 140 may be connected to the antenna 141 or may be connected to the antenna 121 through the switching device 129 to form a radio frequency circuit for transmitting signals of a third communication system, for example, the signals of the third communication system may be 5G signals, that is, a part of signals of the third communication system may be transmitted and received by the antenna 141, and another part of signals may be transmitted and received by the antenna 121. The multimode, multifrequency power amplifier 140 may include a high frequency power amplifier 142 and a switching device 143, an intermediate frequency power amplifier 144 and a switching device 145, a low frequency power amplifier 134 and a switching device 135, the switching device 143 may be, for example, a single pole, double throw switch, and the switching device 145 and the switching device 147 may each be, for example, a single pole, five throw switch. One end of the switching device 143 is connected to the high-frequency power amplifier 142, and the other end of the switching device 143 is connected to the antenna 141. One end of the switching device 145 is connected to the intermediate frequency power amplifier 144, and the other end of the switching device 145 may be connected to the antenna 121 through the switching device 129. One end of the switching device 147 is connected to the low frequency power amplifier 146, and the other end of the switching device 147 may be connected to the antenna 121 through the switching device 129. The rf circuit of the signal of the third communication system may include, for example, three rf branches connected to the high frequency power amplifier 142, the intermediate frequency power amplifier 144 and the low frequency power amplifier 146, respectively, to transmit the signal of the high/medium/low frequency band of the third communication system, respectively, in the same operation principle as the multimode multifrequency power amplifier 130. Reference may be made in particular to the description of the multimode, multifrequency power amplifier 130 section. For ease of description, fig. 1 mainly shows a portion of the radio frequency system 1000, and in practice, the radio frequency system 1000 may further include other devices, such as a switching device, an impedance adjusting device, a duplexer, and the like.
From the foregoing, it can be seen that the rf system 1000 can support signals of multiple communication schemes (e.g., 2G signal, 4G signal, 5G signal, etc.), and that each communication scheme includes a power amplifier in the rf circuit, and as an example, an intermediate frequency power amplifier 122 and a low frequency power amplifier 126 can be included in the 2G rf circuit, and a multimode multi-frequency power amplifier can be included in both the 4G and 5G rf circuits. Too many power amplifiers can make the cost of the rf system relatively high, and in addition, a relatively large area is occupied where the chip is such an earth.
In order to solve the above-mentioned problems, an embodiment of the present application provides a radio frequency system, which can support multiple communication systems, and the radio frequency system includes a radio frequency front end component, where the radio frequency front end component includes multiple radio frequency branches, a power amplifier and a switching device, and the multiple radio frequency branches can be used to correspondingly transmit signals of multiple communication systems. One end of the switching device is connected with the power amplifier, the other end of the switching device is connected with the plurality of radio frequency branches, and the switching device can switch the communication states of the plurality of radio frequency branches according to signals of different communication modes, so that the plurality of radio frequency branches can share the power amplifier, thereby being beneficial to reducing the cost of a radio frequency system and saving the occupied area of a chip in the radio frequency system.
Therefore, how to reduce the cost of the radio frequency system and save the occupied area of the radio frequency system chip is a problem to be solved.
In view of the foregoing, an embodiment of the present application provides a radio frequency system, and the following details of the embodiment of the present application are described.
Fig. 2 is a schematic diagram of a radio frequency system according to an embodiment of the present application. Referring to fig. 2, a radio frequency system 2000 in accordance with an embodiment of the present application includes a radio frequency transceiver 210 and a radio frequency front end component 200.
The rf transceiver 210 may support the transmission or reception functions of wireless rf signals of various systems. The signals of the multiple communication systems may include, for example, a 2G signal, a 4G signal, and a 5G signal.
The rf front-end module 200 is connected to an rf transceiver, and the rf front-end module 200 includes a plurality of rf circuits that can be used to transmit or receive signals of a plurality of communication systems. The radio frequency front end assembly 200 includes a first power amplifier 222, a first radio frequency branch 223, a second radio frequency branch 224, and a switching device 225.
The first power amplifier 222 is connected to the rf transceiver 210, and is used for amplifying the rf signal sent by the rf transceiver 210, and the first power amplifier 222 may be, for example, a low-frequency power amplifier, an intermediate-frequency power amplifier, etc., which is not limited in this embodiment of the present application.
The first radio frequency branch 223 is connected to the first power amplifier 222 and is configured to transmit signals of a first communication system, for example, a 2G signal.
The second rf branch 224 is also connected to the first power amplifier 222 and is configured to transmit signals of a second communication system, which may be a 4G signal.
One end T1 of the switching device 225 may be connected to the first power amplifier 222, and when the rf system 2000 transmits a signal of the first communication system, the other end T2 of the switching device 225 may be connected to the first rf branch 223, where the power amplifier 222 may be used to power amplify the signal of the first communication system. When the rf system 2000 transmits a signal of the second communication system, the other end T2 of the switching device 225 may be connected to the second rf branch 224, and the power amplifier 222 may be used to amplify the signal of the second communication system.
It can be seen that the rf system 2000 shown in fig. 2 can support multiple communication modes, and by providing the switching device 225 in the rf front-end module 200, which is matched with the power amplifier 222, the first rf branch 223 and the second rf branch 224 can share the same power amplifier, so that the cost of the rf system 2000 can be saved. In addition, the power amplifier on the second rf branch is saved, and the chip occupation area in the rf system 2000 can be reduced. It should be noted that, when the signal of the first communication system is a 2G signal, the radio frequency system 2000 may still satisfy the 4G and 5G signals in the ENDC state and transmit the scene.
One possible implementation of the rf front-end assembly 200 is given below by way of example in fig. 3.
As shown in fig. 3, the radio frequency front end assembly 200 may include a plurality of power amplifiers, and the first power amplifier 222 may be any of the plurality of power amplifiers. The plurality of power amplifiers may include, for example, a first power amplifier 222 and a second power amplifier 226, the first power amplifier 222 may be, for example, an intermediate frequency power amplifier, and the second power amplifier 226 may be, for example, a low frequency power amplifier. The content related to the first power amplifier 222 may be described with reference to portions of the content in fig. 2. The second power amplifier 226 may be connected to the rf transceiver 210 for power amplifying the rf signal in the low frequency band emitted by the rf transceiver 210. The rf front-end assembly 200 further includes a third rf leg 227, a fourth rf leg 228, and a switching device 229. The third radio frequency branch 227 may be used to transmit low frequency band signals of the first communication system, and the fourth radio frequency branch 228 may be used to transmit low frequency band signals of the second communication system. One end T1 of the switching device 229 may be connected to the second power amplifier 226, and when the rf system 2000 transmits the low frequency band signal of the first communication system, the other end T2 of the switching device 229 may be connected to the first rf branch 227, where the power amplifier 226 may be used to power amplify the low frequency band signal of the first communication system. When the rf system 2000 transmits the low frequency band signal of the second communication system, the other end T2 of the switching device 229 may be connected to the second rf branch 228, and the power amplifier 226 may be used to amplify the power of the low frequency band signal of the second communication system. It should be appreciated that each power amplifier in the rf front-end module 200 may simultaneously power amplify signals of multiple communication schemes. Taking the first power amplifier 222 as an example, when the first power amplifier 222 is an intermediate frequency power amplifier, the first power amplifier 222 can amplify signals in intermediate frequency bands of multiple communication systems at the same time. When the first power amplifier 222 is a low-frequency power amplifier, the first power amplifier 222 can amplify the signals of the low-frequency band of multiple communication systems at the same time. That is, signals of a plurality of communication schemes may share the first power amplifier 222 and the second power amplifier 226. For example, the radio frequency branch connected to the first power amplifier 222 for transmitting signals of different standards may include three radio frequency branches (for transmitting signals of three different standards), or more, and the embodiment of the present application is not limited in this particular manner.
In some embodiments, the radio frequency front end assembly 200 may include a radio frequency front end transmit chip 220, and the first power amplifier 222, the second radio frequency branch 223, the second radio frequency branch 224, and the switching device 225 may be integrated in the front end transmit chip 220. Of course, the rf front-end transmit chip 220 may further include a second power amplifier 226, a third rf branch 227, a fourth rf branch 228, and a switching device 229. As an example, the first power amplifier 222 may be an intermediate frequency power amplifier, the second power amplifier 226 may be a low frequency power amplifier, and both the two amplifiers may amplify the power of the signal of the first communication system and the signal of the second communication system, where the signal of the first communication system may be, for example, a 2G signal, and the signal of the second communication system may be a 4G signal.
With continued reference to fig. 3, in some embodiments, the rf front-end assembly 200 may further include a multimode, multifrequency power amplifier 240, one end of the multimode, multifrequency power amplifier 240 being connected to the rf transceiver 210, the other end of the multimode, multifrequency power amplifier 240 being connectable to an antenna 241, and also connectable to the antenna 221 via a switching device 129 to form an rf circuit for transmitting signals of a third communication scheme, which may be, for example, 5G signals. The multimode, multi-frequency power amplifier 240 may include a high frequency power amplifier 242 and a switching device 243, an intermediate frequency power amplifier 244 and a switching device 245, and a low frequency power amplifier 234 and a switching device 235. The multimode multi-frequency power amplifier 240 is the same device as the multimode multi-frequency power amplifier 140, and specific reference may be made to the description of the portion of the multimode multi-frequency power amplifier 140, without specific limitation. For ease of description, fig. 3 mainly shows a portion of the radio frequency system 2000, and in practice, the radio frequency system 2000 may further include other devices, such as a switching device, an impedance adjusting device, a duplexer, and the like.
For better understanding of the 2G signal, 4G signal, and 5G signal transmission processes, the first power amplifier 222 is used for the 2G signal and 4G signal, and as an example, the rf transceiver 210 may control the first rf branch 223 in the rf front-end transmitting chip 220 to be in an operating state when the rf system 2000 transmits the 2G signal, and the rf transceiver 210 may control the multimode multi-frequency power amplifier 240 and the second rf branch 224 in the rf front-end transmitting chip 220 to be in an operating state when the rf system 2000 simultaneously transmits the 4G signal and the 5G signal. Similarly, the second power amplifier 226 may be used to power amplify the 2G signal and the 4G signal, which will not be described in detail herein.
In some embodiments, the 2G signal, the 4G signal, and the 5G signal may also share the first power amplifier 222 and the second power amplifier 226 without affecting the 4G and 5G signals in the ENDC state and transmitting, which may further reduce the volume and cost of the radio frequency front end assembly 200.
In some embodiments, the radio frequency system 2000 may implement 4G signals and 5G signals in the ENDC state and transmit and receive, and the frequency band of the 4G signals may include, for example, the communication frequency band of low and medium frequencies of B1, B3, B5, and so on. The frequency band of the 5G signal may include, for example, communication frequency bands of high, medium and low frequencies such as N1, N28, N41, etc. The operation of the rf system 2000 will be described in detail below with reference to b3+n41 and a transmission scenario.
Working process in the ENDC state:
as shown in fig. 3, in order to implement the ENDC combined dual-transmission function of b3+n41, after the B3 signal is transmitted from the radio frequency transceiver 210, the B3 signal may enter the first power amplifier 222 in the radio frequency front-end transmitting chip 220, where one end T1 of the switching device 225 is connected to the first amplifier 222, the other end T2 of the switching device 225 is connected to the second radio frequency branch 224, and the B3 signal enters the transmitting (Tx) portion of the duplexer of the B3 signal through the switching device 133, then enters the switching device 129, and is transmitted through the antenna 221. At the same time, the N41 signal is transmitted from the rf transceiver 210, into the high frequency power amplifier 242 in the multimode, multifrequency power amplifier 240, out through the switching device 243, into the diplexer (e.g., time division diplexer) of the B41 signal, and finally out through the antenna 241. It should be understood that the rf signal of the corresponding frequency band may be received through the antenna, and a receiving process of the B3 signal received by the antenna 221 will be described below as an example. The antenna may receive a B3 signal transmitted by a network device or base station, etc., and then transmit to the radio frequency transceiver 210 via a receive (Rx) portion of a duplexer (which may be, for example, a frequency division duplexer) of the B3 signal.
Working process under GSM state:
The high-frequency band signal of GSM is sent from the radio-frequency transceiver 210 and can enter the first power amplifier 222 in the radio-frequency front-end transmitting chip 220, one end T1 of the switching device 225 is connected with the first power amplifier 222, the other end T2 of the switching device 225 is connected with the first radio-frequency branch 223, the high-frequency band signal of GSM enters the switching device 129 through the duplexer, and finally is transmitted out through the antenna 221. Similarly, the low-frequency band signal of GSM is sent from the radio-frequency transceiver 210 and can enter the second power amplifier 226 in the radio-frequency front-end transmitting chip 220, where one end T1 of the switching device 229 is connected to the second power amplifier 226, the other end T2 of the switching device 229 is connected to the third radio-frequency branch 227, and the low-frequency band signal of GSM enters the switching device 129 through the duplexer and finally is transmitted out through the antenna 221. It should be noted that, the first rf branch 223 and the third rf branch 227 further include an impedance adjusting device and the like.
The embodiment of the application also provides an ENDC combination technical scheme, and the technical scheme is described in detail below with reference to fig. 4 to 6.
As shown in fig. 4, the ENDC scheme mainly uses a 4G signal as an anchor point of a control plane, a 4G base station (eNB) as a master station, a 5G base station (gNB) as a slave station, and a 4G core network. Wherein the C-plane is responsible for handling control signals, i.e. managing call connections, and the U-plane is responsible for handling voice signals, i.e. managing call content. In NSA mode, the 5G network can be reconnected only by connecting the 4G network via the C-plane, i.e. the 5G network cannot be connected separately before the 4G network is connected.
In an LTE dual connection, a radio resource control (radio resource control, RRC) protocol may be established between the master station and the handset, i.e. RRC messages are only transmitted between the master station and the handset. However, the master station and the slave station respectively perform radio resource management (radio resource management, RRM), and the RRM functions are coordinated with each other through an X2 interface between the master station and the slave station, for example, after the slave station allocates resources, the master station interacts with the master station through the X2 interface, and then the master station sends an RRC message containing the resource configuration of the slave station to the mobile phone. In brief, the handset can only see the RRC message from the master station only and will only reply to the master station, as shown in fig. 5. Currently, in LTE-NR dual connectivity, not only are the master and slave stations each performing RRM, but the RRC protocol is also established independently between the master and slave stations and the handset. That is, the secondary station no longer performs RRM interaction coordination with the primary station through the X2 interface, but directly transmits from the secondary station to the handset through the RRC message, as shown in fig. 6. In addition, independent RRC connection also means that the master station and the slave station can independently set RRC measurements.
The embodiment of the application also provides wireless communication equipment, which comprises a baseband system and any possible radio frequency system, wherein the baseband system can be used for generating a baseband signal, and the radio frequency system can be used for generating a radio frequency signal according to the baseband signal.
An embodiment of the apparatus of the present application is described above in detail with reference to fig. 1 to 6, and an embodiment of the method of the present application is described below in detail with reference to fig. 7. It is to be understood that the description of the method embodiments corresponds to the description of the device embodiments, and that parts not described in detail can therefore be seen in the preceding device embodiments.
Fig. 7 is a flowchart of a control method of a radio frequency system according to an embodiment of the present application. The control method 700 can be used for the radio frequency system described above, wherein the radio frequency system comprises a radio frequency transceiver, a radio frequency front end component, a second radio frequency branch, a switching device and a switching device, wherein the radio frequency front end component comprises a first power amplifier, a first radio frequency branch, a second radio frequency branch and a switching device, the first power amplifier is connected with the radio frequency transceiver, the first radio frequency branch is connected with the first power amplifier and is used for transmitting signals of a first communication system, the second radio frequency branch is connected with the first power amplifier and is used for transmitting signals of a second communication system, one end of the switching device is connected with the first power amplifier, the other end of the switching device is connected with the first radio frequency branch when the radio frequency system transmits signals of the first communication system, and the other end of the switching device is connected with the second radio frequency branch when the radio frequency system transmits signals of the second communication system;
the method 700 may include steps S720-S740.
In step S720, when the radio frequency system transmits the signal of the first communication system, the other end of the switching device is controlled to be connected with the first radio frequency branch;
in step S740, when the radio frequency system transmits the signal of the second communication system, the other end of the switching device is controlled to be connected with the second radio frequency branch.
An apparatus 800 for controlling a radio frequency system according to an embodiment of the present application is described below with reference to fig. 8. The dashed lines in fig. 8 indicate that the unit or module is optional. The apparatus 800 may be used to implement the methods described in the method embodiments above. The apparatus 800 may be a computer or any type of electronic device.
The apparatus 800 may include one or more processors 810. The processor 810 may support the apparatus 800 to implement the methods described in the method embodiments above.
The apparatus 800 may also include one or more memories 820. The memory 820 has stored thereon a program that can be executed by the processor 810 to cause the processor 810 to perform the method described in the method embodiments above. The memory 820 may be separate from the processor 810 or may be integrated in the processor 810.
The apparatus 800 may also include a transceiver 830. The processor 810 may communicate with other devices via the transceiver 830. For example, the processor 810 may transmit and receive data to and from other devices via the transceiver 830.
The embodiment of the application also provides a machine-readable storage medium for storing a program. And which causes a computer to perform the methods in the various embodiments of the application.
The embodiment of the application also provides a computer program product. The computer program product includes a program. The program causes a computer to execute the method in the various embodiments of the application.
The embodiment of the application also provides a computer program. The computer program causes a computer to perform the methods of the various embodiments of the application.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present disclosure, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a machine-readable storage medium or transmitted from one machine-readable storage medium to another machine-readable storage medium, for example, from one website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The machine-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more servers, data centers, etc. integrated with the available medium. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., digital video disc (Digital Video Disc, DVD)), or a semiconductor medium (e.g., solid state disk (Solid STATE DISK, SSD)), etc.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
In the several embodiments provided in the present disclosure, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The foregoing is merely specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the disclosure, and it is intended to cover the scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.